Release v0.3.10-beta02

Added support for private clipboard and clipboard history

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 120
+trim_trailing_whitespace = true
+
+[{*.har,*.json}]
+indent_size = 2
+
+[*.kt]
+ij_kotlin_name_count_to_use_star_import = 99
+ij_kotlin_name_count_to_use_star_import_for_members = 99

.gitattributes

@@ -1 +1,2 @@
-* text=auto eol=lf
+* text=auto eol=lf
+*.bat text=auto eol=crlf

README.md

@@ -1,14 +1,15 @@
 <img align="left" width="80" height="80"
 src="fastlane/metadata/android/en-US/images/icon.png" alt="App icon">
 
-# FlorisBoard [![Release](https://img.shields.io/github/v/release/florisboard/florisboard)](https://github.com/florisboard/florisboard/releases) [![Crowdin](https://badges.crowdin.net/florisboard/localized.svg)](https://crowdin.florisboard.patrickgold.dev) ![FlorisBoard CI](https://github.com/florisboard/florisboard/workflows/FlorisBoard%20CI/badge.svg?event=push)
+# FlorisBoard [![Crowdin](https://badges.crowdin.net/florisboard/localized.svg)](https://crowdin.florisboard.patrickgold.dev) ![FlorisBoard CI](https://github.com/florisboard/florisboard/workflows/FlorisBoard%20CI/badge.svg?event=push)
 
 **FlorisBoard** is a free and open-source keyboard for Android 6.0+
 devices. It aims at being modern, user-friendly and customizable while
-fully respecting your privacy. Currently in alpha/early-beta state.
+fully respecting your privacy. Currently in early-beta state.
 
-## Public Alpha Test Programme
-Wanna try it out on your device? Use one of the following options:
+### Stable [![Latest stable release](https://img.shields.io/github/v/release/florisboard/florisboard)](https://github.com/florisboard/florisboard/releases/latest)
+
+Releases on this track are in general stable and ready for everyday use, except for features marked as experimental. Use one of the following options to receive FlorisBoard's stable releases:
 
 _A. Get it on F-Droid_:
 
@@ -36,6 +37,16 @@ for and download FlorisBoard without prior joining the alpha group.
 
 _C. Use the APK provided in the release section of this repo_
 
+### Beta [![Latest beta release](https://img.shields.io/github/v/release/florisboard/florisboard?include_prereleases)](https://github.com/florisboard/florisboard/releases)
+
+Releases on this track are also in general stable and should be ready for everyday use, though crashes and bugs are more likely to occur. Use releases from this track if you want to get new features faster and give feedback for brand-new stuff. Options to get beta releases:
+
+_A. IzzySoft's repo for F-Droid_:
+
+[<img src="https://gitlab.com/IzzyOnDroid/repo/-/raw/master/assets/IzzyOnDroid.png" height="64" alt="IzzySoft repo badge">](https://apt.izzysoft.de/fdroid/index/apk/dev.patrickgold.florisboard.beta)
+
+_B. Use the APK provided in the release section of this repo_
+
 ### Giving feedback
 If you want to give feedback to FlorisBoard, there are several ways to
 do so, as listed [here](CONTRIBUTING.md#giving-general-feedback).
@@ -62,11 +73,9 @@ milestones, please refer to the [Feature roadmap](#feature-roadmap).
 * [x] Landscape orientation support (needs tweaks)
 
 ### Layouts
-* [x] Latin character layouts (QWERTY, QWERTZ, AZERTY, Swiss, Spanish,
-      Norwegian, Swedish/Finnish, Icelandic, Danish, Hungarian,
-      Croatian, Polish, Romanian); more coming in future versions
-* [x] Non-latin character layouts (Arabic, Persian, Greek, Russian
-      (JCUKEN))
+* [x] Latin character layouts (QWERTY, QWERTZ, AZERTY, Swiss, Spanish, Norwegian, Swedish/Finnish, Icelandic, Danish,
+      Hungarian, Croatian, Polish, Romanian, Colemak, Dvorak, ...)
+* [x] Non-latin character layouts (Arabic, Persian, Greek, Russian (JCUKEN))
 * [x] Adapt to situation in app (password, url, text, etc. )
 * [x] Special character layout(s)
 * [x] Numeric layout
@@ -88,6 +97,7 @@ milestones, please refer to the [Feature roadmap](#feature-roadmap).
 ### Other useful features
 * [x] One-handed mode
 * [x] Clipboard/cursor tools
+* [x] Clipboard manager/history
 * [x] Integrated number row / symbols in character layouts
 * [x] Gesture support
 * [x] Full integration in IME service list of Android (xml/method)
@@ -106,7 +116,7 @@ most likely be delayed back, even though I'm eager to stick to these as
 close as possible.
 
 ### [v0.4.0](https://github.com/florisboard/florisboard/milestone/4)
-- Module A: Smartbar rework (Implemented with #91)
+- Module A: Smartbar rework (Implemented with [#91])
   - Ability to enable/disable Smartbar (features below thus only work if
     Smartbar is enabled)
   - Dynamic switching between clipboard tools and word suggestions
@@ -115,14 +125,13 @@ close as possible.
   - Complete rework of the Smartbar code base and the Smartbar layout
     definition in XML
 
-- Module B: Composing suggestions
+- Module B: Composing suggestions (Phase 1: [#329])
   - Auto-suggestion of words based of precompiled dictionaries
   - Management of custom dictionary entries
-  - Opt-in only: Learning of often typed word pais to better predict next
-    words over time. Data collected here is stored locally and never leaves
+  - Next-word suggestions by training language models. Data collected here is stored locally and never leaves
     the user's device.
 
-- Module C: Extension packs (base implementation with #162)
+- Module C: Extension packs (base implementation with [#162])
   - Ability to load dictionaries (and later potentially other cool
     features too) only if needed to keep the core APK size small
   - Currently unclear how exactly this will work, but this is definitely
@@ -132,13 +141,14 @@ close as possible.
   - Swiping over the characters will automatically convert this to a word
   - Possibly also add improvements based on the Flow keyboard
 
-- Module E: Theme rework (Implemented with #162)
+- Module E: Theme rework (Implemented with [#162])
   - Themes are now based on the Asset schema
   - Dynamic theme creation
-  - Different theme modes (`Always day`, `Always dark`, `Follow system`
+  - Different theme modes (`Always day`, `Always night`, `Follow system`
     and `Follow time`)
   - Define a separate theme both for day and night theme
   - Adapt to app theme if possible
+  - Theme import/export
 
 ### [v0.5.0](https://github.com/florisboard/florisboard/milestone/5)
 There's no exact roadmap yet but it is planned that the media part of
@@ -151,9 +161,12 @@ passes...
 
 Backlog (currently not assigned to any milestone):
 
-- Theme import/export
 - Floating keyboard
 
+[#91]: https://github.com/florisboard/florisboard/pull/91
+[#162]: https://github.com/florisboard/florisboard/pull/162
+[#329]: https://github.com/florisboard/florisboard/pull/329
+
 ## Contributing
 Wanna contribute to FlorisBoard? That's great to hear! There are lots of
 different ways to help out. Bug reporting, making pull requests,
@@ -176,11 +189,24 @@ to get more information on this topic.
   [Jared Rummler](https://github.com/jaredrummler)
 * [Timber](https://github.com/JakeWharton/timber) by
   [JakeWharton](https://github.com/JakeWharton)
-* [kotlin-result](https://github.com/michaelbull/kotlin-result) by
-  [Michael Bull](https://github.com/michaelbull)
 * [expandable-fab](https://github.com/nambicompany/expandable-fab) by
   [Nambi](https://github.com/nambicompany)
 
+## Usage notes for included binary dictionary files
+All binary dictionaries included within this project in
+(this)[app/src/main/assets/ime/dict) asset folder are built from various
+sources, as stated below.
+
+### Source 1: [wordfreq library by LuminosoInsight](https://github.com/LuminosoInsight/wordfreq):
+`wordfreq` is a repository which provides both a Python library and raw
+data (the wordlists). Only the data has been extracted in order to build
+binary dictionary files from it. `wordfreq`'s data is licensed under the
+Creative Commons Attribution-ShareAlike 4.0 license
+(https://creativecommons.org/licenses/by-sa/4.0/).
+
+For further information on what wordfreq's data depends on, see
+(https://github.com/LuminosoInsight/wordfreq#license).
+
 ## License
 ```
 Copyright 2020 Patrick Goldinger

app/.gitignore

@@ -1 +0,0 @@
-/build

app/build.gradle

@@ -1,76 +0,0 @@
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
-
-android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.2"
-
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_1_8.toString()
-    }
-
-    defaultConfig {
-        applicationId "dev.patrickgold.florisboard"
-        minSdkVersion 23
-        targetSdkVersion 29
-        versionCode 26
-        versionName "0.3.7"
-
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-    }
-
-    buildFeatures {
-        viewBinding true
-    }
-
-    buildTypes {
-        debug {
-            applicationIdSuffix ".debug"
-            resValue 'string', 'floris_app_name', 'FlorisBoard Debug'
-        }
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
-            resValue 'string', 'floris_app_name', '@string/app_name'
-        }
-    }
-
-    testOptions {
-        unitTests {
-            includeAndroidResources = true
-        }
-    }
-}
-
-dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
-    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.core:core-ktx:1.3.2'
-    implementation 'androidx.preference:preference-ktx:1.1.1'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    testImplementation 'junit:junit:4.12'
-    testImplementation 'androidx.test:core:1.3.0'
-    testImplementation 'org.mockito:mockito-core:1.10.19'
-    testImplementation 'org.mockito:mockito-inline:2.13.0'
-    testImplementation 'org.robolectric:robolectric:4.4'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
-    implementation 'com.google.android:flexbox:2.0.1'
-    implementation "com.squareup.moshi:moshi-kotlin:1.9.2"
-    implementation 'com.squareup.moshi:moshi-adapters:1.9.2'
-    implementation 'com.google.android.material:material:1.2.1'
-    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.7"
-    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.7"
-    implementation 'com.jaredrummler:colorpicker:1.1.0'
-    implementation 'com.jakewharton.timber:timber:4.7.1'
-    implementation "com.michael-bull.kotlin-result:kotlin-result:1.1.9"
-    implementation 'com.nambimobile.widgets:expandable-fab:1.0.2'
-}

app/build.gradle.kts

@@ -0,0 +1,102 @@
+
+plugins {
+    id("com.android.application") version "4.1.2"
+    kotlin("android") version "1.4.30"
+    kotlin("kapt") version "1.4.30"
+}
+
+android {
+    compileSdkVersion(30)
+    buildToolsVersion("30.0.3")
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+        freeCompilerArgs = listOf("-Xallow-result-return-type") // enables use of kotlin.Result
+    }
+
+    defaultConfig {
+        applicationId = "dev.patrickgold.florisboard"
+        minSdkVersion(23)
+        targetSdkVersion(30)
+        versionCode(30)
+        versionName("0.3.10")
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildFeatures {
+        viewBinding = true
+    }
+
+    buildTypes {
+        named("debug").configure {
+            applicationIdSuffix = ".debug"
+            versionNameSuffix = "-debug"
+
+            resValue("mipmap", "floris_app_icon", "@mipmap/ic_app_icon_debug")
+            resValue("mipmap", "floris_app_icon_round", "@mipmap/ic_app_icon_debug_round")
+            resValue("string", "floris_app_name", "FlorisBoard Debug")
+        }
+
+        create("beta") // Needed because by default the "beta" BuildType does not exist
+        named("beta").configure {
+            applicationIdSuffix = ".beta"
+            versionNameSuffix = "-beta02"
+            proguardFiles.add(getDefaultProguardFile("proguard-android-optimize.txt"))
+
+            resValue("mipmap", "floris_app_icon", "@mipmap/ic_app_icon_beta")
+            resValue("mipmap", "floris_app_icon_round", "@mipmap/ic_app_icon_beta_round")
+            resValue("string", "floris_app_name", "FlorisBoard Beta")
+        }
+
+        named("release").configure {
+            proguardFiles.add(getDefaultProguardFile("proguard-android-optimize.txt"))
+
+            resValue("mipmap", "floris_app_icon", "@mipmap/ic_app_icon_release")
+            resValue("mipmap", "floris_app_icon_round", "@mipmap/ic_app_icon_release_round")
+            resValue("string", "floris_app_name", "@string/app_name")
+        }
+    }
+
+    testOptions {
+        unitTests {
+            isIncludeAndroidResources = true
+        }
+    }
+
+    lintOptions {
+        isAbortOnError = false
+    }
+}
+
+
+dependencies {
+    implementation("androidx.activity", "activity-ktx", "1.2.1")
+    implementation("androidx.appcompat", "appcompat", "1.2.0")
+    implementation("androidx.core", "core-ktx", "1.3.2")
+    implementation("androidx.fragment", "fragment-ktx", "1.3.0")
+    implementation("androidx.preference", "preference-ktx", "1.1.1")
+    implementation("androidx.constraintlayout", "constraintlayout", "2.0.4")
+    implementation("androidx.lifecycle", "lifecycle-service", "2.2.0")
+    implementation("com.google.android", "flexbox", "2.0.1") // requires jcenter as of version 2.0.1
+    implementation("com.squareup.moshi", "moshi-kotlin", "1.11.0")
+    implementation("com.squareup.moshi", "moshi-adapters", "1.11.0")
+    implementation("com.google.android.material", "material", "1.3.0")
+    implementation("org.jetbrains.kotlinx", "kotlinx-coroutines-android", "1.4.2")
+    implementation("com.jaredrummler", "colorpicker", "1.1.0")
+    implementation("com.jakewharton.timber", "timber", "4.7.1")
+    implementation("com.nambimobile.widgets", "expandable-fab", "1.0.2")
+    implementation("androidx.room", "room-runtime", "2.2.6")
+    kapt("androidx.room", "room-compiler","2.2.6")
+
+    testImplementation("junit", "junit", "4.13.1")
+    testImplementation("org.mockito", "mockito-inline", "3.7.7")
+    testImplementation("org.robolectric", "robolectric", "4.5.1")
+    androidTestImplementation("androidx.test.ext", "junit", "1.1.2")
+    androidTestImplementation("androidx.test.espresso", "espresso-core", "3.3.0")
+}

app/proguard-rules.pro

@@ -1,21 +0,0 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile

app/src/androidTest/java/dev/patrickgold/florisboard/ExampleInstrumentedTest.kt

@@ -1,13 +1,11 @@
 package dev.patrickgold.florisboard
 
-import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.ext.junit.runners.AndroidJUnit4
-
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Assert.assertEquals
 import org.junit.Test
 import org.junit.runner.RunWith
 
-import org.junit.Assert.*
-
 /**
  * Instrumented test, which will execute on an Android device.
  *

app/src/main/AndroidManifest.xml

@@ -23,9 +23,9 @@
     <application
         android:name=".ime.core.FlorisApplication"
         android:allowBackup="false"
-        android:icon="@mipmap/ic_launcher"
+        android:icon="@mipmap/floris_app_icon"
         android:label="@string/floris_app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
+        android:roundIcon="@mipmap/floris_app_icon_round"
         android:supportsRtl="true"
         android:theme="@style/SettingsTheme">
 
@@ -46,19 +46,19 @@
         <!-- Settings Activity -->
         <activity
             android:name="dev.patrickgold.florisboard.settings.SettingsMainActivity"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/settings__title"
             android:launchMode="singleTask"
-            android:roundIcon="@mipmap/ic_launcher_round"
+            android:roundIcon="@mipmap/floris_app_icon_round"
             android:theme="@style/SettingsTheme"/>
 
         <!-- Using an activity alias to disable/enable the app icon in the launcher -->
         <activity-alias
             android:name="dev.patrickgold.florisboard.SettingsLauncherAlias"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/floris_app_name"
             android:launchMode="singleTask"
-            android:roundIcon="@mipmap/ic_launcher_round"
+            android:roundIcon="@mipmap/floris_app_icon_round"
             android:targetActivity="dev.patrickgold.florisboard.setup.SetupActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
@@ -69,48 +69,56 @@
         <!-- Theme Selector Activity -->
         <activity
             android:name="dev.patrickgold.florisboard.settings.ThemeManagerActivity"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/settings__title"
             android:theme="@style/SettingsTheme"/>
 
         <!-- Theme Editor Activity -->
         <activity
             android:name="dev.patrickgold.florisboard.settings.ThemeEditorActivity"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/settings__theme_editor__title"
             android:theme="@style/SettingsTheme"/>
 
         <!-- About Activity -->
         <activity
             android:name="dev.patrickgold.florisboard.settings.AboutActivity"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/about__title"
-            android:roundIcon="@mipmap/ic_launcher_round"
+            android:roundIcon="@mipmap/floris_app_icon_round"
             android:theme="@style/SettingsTheme"/>
 
         <!-- Advanced Activity -->
         <activity
             android:name="dev.patrickgold.florisboard.settings.AdvancedActivity"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/settings__advanced__title"
-            android:roundIcon="@mipmap/ic_launcher_round"
+            android:roundIcon="@mipmap/floris_app_icon_round"
             android:theme="@style/SettingsTheme"/>
 
         <!-- Setup Activity -->
         <activity
             android:name="dev.patrickgold.florisboard.setup.SetupActivity"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/setup__title"
-            android:roundIcon="@mipmap/ic_launcher_round"
+            android:roundIcon="@mipmap/floris_app_icon_round"
             android:theme="@style/SettingsTheme"/>
 
         <!-- Crash Dialog Activity -->
         <activity
             android:name="dev.patrickgold.florisboard.crashutility.CrashDialogActivity"
-            android:icon="@mipmap/ic_launcher"
+            android:icon="@mipmap/floris_app_icon"
             android:label="@string/crash_dialog__title"
             android:theme="@style/CrashDialogTheme"/>
 
+        <provider
+            android:name="dev.patrickgold.florisboard.ime.clip.provider.FlorisContentProvider"
+            android:authorities="dev.patrickgold.florisboard.provider.clip"
+            android:grantUriPermissions="true"
+            android:exported="false">
+        </provider>
+
+
     </application>
 
 </manifest>

app/src/main/assets/ime/text/characters/bepo.json

@@ -31,6 +31,8 @@
         { "code":  231, "label": "ç" }
       ],
       [
+        { "code":  234, "label": "ê" },
+        { "code":  224, "label": "à" },
         { "code":  121, "label": "y" },
         { "code":  120, "label": "x" },
         { "code":  107, "label": "k" },

app/src/main/assets/ime/text/characters/colemak.json

@@ -18,7 +18,7 @@
         "relevant": [
           { "code":   58, "label": ":" }
         ]
-      } }
+      }, "shift": { "code":   58, "label": ":" } }
     ],
     [
       { "code":   97, "label": "a" },

app/src/main/assets/ime/text/characters/dvorak.json

@@ -12,25 +12,25 @@
           { "code":   33, "label": "!" },
           { "code":   34, "label": "\"" }
         ]
-      } },
+      }, "shift": { "code":   34, "label": "\"" } },
       { "code":   39, "label": "'", "groupId": 101, "variation": "password", "popup": {
         "relevant": [
           { "code":   33, "label": "!" },
           { "code":   34, "label": "\"" }
         ]
-      } },
+      }, "shift": { "code":   34, "label": "\"" } },
       { "code":   47, "label": "/", "groupId": 101, "variation": "uri" },
       { "code":   44, "label": ",", "popup": {
         "relevant": [
           { "code":   60, "label": "<" },
           { "code":   63, "label": "?" }
         ]
-      } },
+      }, "shift": { "code":   60, "label": "<" } },
       { "code":   46, "label": ".", "popup": {
         "relevant": [
           { "code":   62, "label": ">" }
         ]
-      } },
+      }, "shift": { "code":   62, "label": ">" } },
       { "code":  112, "label": "p" },
       { "code":  121, "label": "y" },
       { "code":  102, "label": "f" },

app/src/main/assets/ime/text/characters/extended_popups/$default.json

@@ -7,7 +7,8 @@
       "~enter": {
         "main": { "code": -213, "label": "switch_to_media_context", "type": "system_gui" },
         "relevant": [
-          { "code": -216, "label": "toggle_one_handed_mode_right", "type": "system_gui" }
+          { "code": -216, "label": "toggle_one_handed_mode_right", "type": "system_gui" },
+          { "code": -214, "label": "switch_to_clipboard_context", "type": "system_gui"}
         ]
       },
       "~left": {

app/src/main/assets/ime/text/extension/clipboard_cursor_row.json

@@ -10,7 +10,8 @@
       { "code":  -20, "label": "arrow_left", "type": "navigation" },
       { "code":  -21, "label": "arrow_right", "type": "navigation" },
       { "code": -131, "label": "clipboard_cut", "type": "enter_editing" },
-      { "code": -132, "label": "clipboard_paste", "type": "enter_editing" }
+      { "code": -132, "label": "clipboard_paste", "type": "enter_editing" },
+      { "code": -214, "label": "switch_to_clipboard_context", "type":  "system_gui"}
     ]
   ]
 }

app/src/main/assets/ime/text/numeric/advanced/default.json

@@ -48,7 +48,7 @@
       { "code":   48, "label": "0", "type": "numeric" },
       { "code":   61, "label": "=" },
       { "code":   46, "label": "." },
-      { "code":   10, "label": "enter", "type": "enter_editing" }
+      { "code":   10, "label": "enter", "groupId": 3, "type": "enter_editing" }
     ]
   ]
 }

app/src/main/assets/license/open_source_licenses.html

@@ -800,6 +800,384 @@ shall not be used in advertising or otherwise to promote the sale,
 use or other dealings in these Data Files or Software without prior
 written authorization of the copyright holder.
     </pre>
+
+    <hr>
+
+    <h3>Dictionary Source 1: wordfreq data</h3>
+    <span>Copyright (c) 2015 Luminoso Technologies, Inc.</span>
+    <pre>
+Creative Commons Attribution-ShareAlike 4.0 International Public
+License
+
+By exercising the Licensed Rights (defined below), You accept and agree
+to be bound by the terms and conditions of this Creative Commons
+Attribution-ShareAlike 4.0 International Public License ("Public
+License"). To the extent this Public License may be interpreted as a
+contract, You are granted the Licensed Rights in consideration of Your
+acceptance of these terms and conditions, and the Licensor grants You
+such rights in consideration of benefits the Licensor receives from
+making the Licensed Material available under these terms and
+conditions.
+
+
+Section 1 -- Definitions.
+
+  a. Adapted Material means material subject to Copyright and Similar
+     Rights that is derived from or based upon the Licensed Material
+     and in which the Licensed Material is translated, altered,
+     arranged, transformed, or otherwise modified in a manner requiring
+     permission under the Copyright and Similar Rights held by the
+     Licensor. For purposes of this Public License, where the Licensed
+     Material is a musical work, performance, or sound recording,
+     Adapted Material is always produced where the Licensed Material is
+     synched in timed relation with a moving image.
+
+  b. Adapter's License means the license You apply to Your Copyright
+     and Similar Rights in Your contributions to Adapted Material in
+     accordance with the terms and conditions of this Public License.
+
+  c. BY-SA Compatible License means a license listed at
+     creativecommons.org/compatiblelicenses, approved by Creative
+     Commons as essentially the equivalent of this Public License.
+
+  d. Copyright and Similar Rights means copyright and/or similar rights
+     closely related to copyright including, without limitation,
+     performance, broadcast, sound recording, and Sui Generis Database
+     Rights, without regard to how the rights are labeled or
+     categorized. For purposes of this Public License, the rights
+     specified in Section 2(b)(1)-(2) are not Copyright and Similar
+     Rights.
+
+  e. Effective Technological Measures means those measures that, in the
+     absence of proper authority, may not be circumvented under laws
+     fulfilling obligations under Article 11 of the WIPO Copyright
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+
+  f. Exceptions and Limitations means fair use, fair dealing, and/or
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+
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+
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+     or other material to which the Licensor applied this Public
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+  i. Licensed Rights means the rights granted to You subject to the
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+               Material.
+
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+
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+
+       3. To the extent possible, the Licensor waives any right to
+          collect royalties from You for the exercise of the Licensed
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+
+Section 3 -- License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the
+following conditions.
+
+  a. Attribution.
+
+       1. If You Share the Licensed Material (including in modified
+          form), You must:
+
+            a. retain the following if it is supplied by the Licensor
+               with the Licensed Material:
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+                 i. identification of the creator(s) of the Licensed
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+                    designated);
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+                ii. a copyright notice;
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+                    warranties;
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+
+            c. indicate the Licensed Material is licensed under this
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+
+       2. You may satisfy the conditions in Section 3(a)(1) in any
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+          reasonable to satisfy the conditions by providing a URI or
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+
+       3. If requested by the Licensor, You must remove any of the
+          information required by Section 3(a)(1)(A) to the extent
+          reasonably practicable.
+
+  b. ShareAlike.
+
+     In addition to the conditions in Section 3(a), if You Share
+     Adapted Material You produce, the following conditions also apply.
+
+       1. The Adapter's License You apply must be a Creative Commons
+          license with the same License Elements, this version or
+          later, or a BY-SA Compatible License.
+
+       2. You must include the text of, or the URI or hyperlink to, the
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+          context in which You Share Adapted Material.
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+       3. You may not offer or impose any additional or different terms
+          or conditions on, or apply any Effective Technological
+          Measures to, Adapted Material that restrict exercise of the
+          rights granted under the Adapter's License You apply.
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+
+Section 4 -- Sui Generis Database Rights.
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+Where the Licensed Rights include Sui Generis Database Rights that
+apply to Your use of the Licensed Material:
+
+  a. for the avoidance of doubt, Section 2(a)(1) grants You the right
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+
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+  c. You must comply with the conditions in Section 3(a) if You Share
+     all or a substantial portion of the contents of the database.
+
+For the avoidance of doubt, this Section 4 supplements and does not
+replace Your obligations under this Public License where the Licensed
+Rights include other Copyright and Similar Rights.
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+
+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
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+
+  c. The disclaimer of warranties and limitation of liability provided
+     above shall be interpreted in a manner that, to the extent
+     possible, most closely approximates an absolute disclaimer and
+     waiver of all liability.
+
+
+Section 6 -- Term and Termination.
+
+  a. This Public License applies for the term of the Copyright and
+     Similar Rights licensed here. However, if You fail to comply with
+     this Public License, then Your rights under this Public License
+     terminate automatically.
+
+  b. Where Your right to use the Licensed Material has terminated under
+     Section 6(a), it reinstates:
+
+       1. automatically as of the date the violation is cured, provided
+          it is cured within 30 days of Your discovery of the
+          violation; or
+
+       2. upon express reinstatement by the Licensor.
+
+     For the avoidance of doubt, this Section 6(b) does not affect any
+     right the Licensor may have to seek remedies for Your violations
+     of this Public License.
+
+  c. For the avoidance of doubt, the Licensor may also offer the
+     Licensed Material under separate terms or conditions or stop
+     distributing the Licensed Material at any time; however, doing so
+     will not terminate this Public License.
+
+  d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
+     License.
+
+
+Section 7 -- Other Terms and Conditions.
+
+  a. The Licensor shall not be bound by any additional or different
+     terms or conditions communicated by You unless expressly agreed.
+
+  b. Any arrangements, understandings, or agreements regarding the
+     Licensed Material not stated herein are separate from and
+     independent of the terms and conditions of this Public License.
+
+
+Section 8 -- Interpretation.
+
+  a. For the avoidance of doubt, this Public License does not, and
+     shall not be interpreted to, reduce, limit, restrict, or impose
+     conditions on any use of the Licensed Material that could lawfully
+     be made without permission under this Public License.
+
+  b. To the extent possible, if any provision of this Public License is
+     deemed unenforceable, it shall be automatically reformed to the
+     minimum extent necessary to make it enforceable. If the provision
+     cannot be reformed, it shall be severed from this Public License
+     without affecting the enforceability of the remaining terms and
+     conditions.
+
+  c. No term or condition of this Public License will be waived and no
+     failure to comply consented to unless expressly agreed to by the
+     Licensor.
+
+  d. Nothing in this Public License constitutes or may be interpreted
+     as a limitation upon, or waiver of, any privileges and immunities
+     that apply to the Licensor or You, including from the legal
+     processes of any jurisdiction or authority.
+
+
+=======================================================================
+
+Creative Commons is not a party to its public
+licenses. Notwithstanding, Creative Commons may elect to apply one of
+its public licenses to material it publishes and in those instances
+will be considered the “Licensor.” The text of the Creative Commons
+public licenses is dedicated to the public domain under the CC0 Public
+Domain Dedication. Except for the limited purpose of indicating that
+material is shared under a Creative Commons public license or as
+otherwise permitted by the Creative Commons policies published at
+creativecommons.org/policies, Creative Commons does not authorize the
+use of the trademark "Creative Commons" or any other trademark or logo
+of Creative Commons without its prior written consent including,
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+public licenses.
+
+Creative Commons may be contacted at creativecommons.org.
+    </pre>
 </body>
 
 </html>

app/src/main/java/dev/patrickgold/florisboard/ime/clip/ClipboardHistoryItemAdapter.kt

@@ -0,0 +1,114 @@
+package dev.patrickgold.florisboard.ime.clip
+
+import android.graphics.drawable.Drawable
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.clip.provider.ClipboardItem
+import dev.patrickgold.florisboard.ime.clip.provider.ItemType
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+
+class ClipboardHistoryItemAdapter(
+        private val dataSet: ArrayDeque<FlorisClipboardManager.TimedClipData>,
+        private val pins: ArrayDeque<ClipboardItem>
+    ) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    class ClipboardHistoryTextViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+        val textView: TextView = view.findViewById(R.id.clipboard_history_item_text)
+    }
+
+    class ClipboardHistoryImageViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+        val imgView: ImageView = view.findViewById(R.id.clipboard_history_item_img)
+    }
+
+    companion object {
+        private const val MAX_SIZE: Int = 256
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        return if (position < pins.size) {
+            // is a pin
+            pins[position].type.value
+        }else {
+            // regular history item
+            dataSet[position - pins.size].data.type.value
+        }
+    }
+
+
+
+
+    override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        // Create a new view, which defines the UI of the list item
+        val vh = when (viewType) {
+            ItemType.IMAGE.value -> {
+                val view = LayoutInflater.from(viewGroup.context)
+                    .inflate(R.layout.clipboard_history_item_image, viewGroup, false)
+
+                ClipboardHistoryImageViewHolder(view)
+            }
+            ItemType.TEXT.value  -> {
+                val view = LayoutInflater.from(viewGroup.context)
+                    .inflate(R.layout.clipboard_history_item_text, viewGroup, false)
+
+                ClipboardHistoryTextViewHolder(view)
+            }
+            else -> null
+        }!!
+        val clipboardInputManager = ClipboardInputManager.getInstance()
+        (vh.itemView as ClipboardHistoryItemView).keyboardView = clipboardInputManager.getClipboardHistoryView()
+        return vh
+    }
+
+    // Replace the contents of a view (invoked by the layout manager)
+    override fun onBindViewHolder(viewHolder: RecyclerView.ViewHolder, position: Int) {
+        when (viewHolder) {
+            is ClipboardHistoryTextViewHolder -> {
+                var text = if (position < pins.size) {
+                    (viewHolder.itemView as ClipboardHistoryItemView).setPinned()
+                    pins[position].text
+                }else {
+                    (viewHolder.itemView as ClipboardHistoryItemView).setUnpinned()
+                    dataSet[position - pins.size].data.text
+                }
+                if (text!!.length > MAX_SIZE) {
+                    text = text.subSequence(0 until MAX_SIZE).toString() + "..."
+                }
+                viewHolder.textView.text = text
+            }
+
+            is ClipboardHistoryImageViewHolder -> {
+                val uri = if (position < pins.size) {
+                    (viewHolder.itemView as ClipboardHistoryItemView).setPinned()
+                    pins[position].uri
+                }else {
+                    (viewHolder.itemView as ClipboardHistoryItemView).setUnpinned()
+                    dataSet[position - pins.size].data.uri
+                }
+
+
+                viewHolder.imgView.clipToOutline = true
+                viewHolder.imgView.visibility = GONE
+                // For very large images, this can take a bit
+                FlorisClipboardManager.getInstance().executor.execute {
+                    val resolver = FlorisBoard.getInstance().context.contentResolver
+                    val inputStream = resolver.openInputStream(uri!!)
+
+                    val drawable = Drawable.createFromStream(inputStream, "clipboard URI")
+                    viewHolder.itemView.post {
+                        viewHolder.imgView.setImageDrawable(drawable)
+                        viewHolder.imgView.visibility = VISIBLE
+                    }
+                }
+            }
+        }
+    }
+    override fun getItemCount() = pins.size + dataSet.size
+
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/ClipboardHistoryItemView.kt

@@ -0,0 +1,86 @@
+package dev.patrickgold.florisboard.ime.clip
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.ImageView
+import android.widget.TextView
+import android.widget.Toast
+import androidx.constraintlayout.widget.ConstraintLayout
+import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.theme.Theme
+import dev.patrickgold.florisboard.ime.theme.ThemeManager
+
+class ClipboardHistoryItemView: ConstraintLayout, ThemeManager.OnThemeUpdatedListener {
+
+    lateinit var keyboardView: ClipboardHistoryView
+    constructor(context: Context) : this(context, null as AttributeSet?)
+    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
+    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
+
+    private var popupManager: ClipboardPopupManager? = null
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+        popupManager = ClipboardPopupManager(keyboardView, FlorisBoard.getInstance().popupLayerView, this)
+
+        setOnClickListener{
+            onClickItem()
+        }
+
+        setOnLongClickListener{
+            onLongClickItem()
+        }
+
+        val themeManager = ThemeManager.default()
+        themeManager.registerOnThemeUpdatedListener(this)
+    }
+
+    override fun onThemeUpdated(theme: Theme) {
+        background.setTint(theme.getAttr(Theme.Attr.KEY_BACKGROUND).toSolidColor().color)
+        val pin = findViewById<ImageView>(R.id.clipboard_pin).drawable
+        pin?.setTint(theme.getAttr(Theme.Attr.KEY_FOREGROUND).toSolidColor().color)
+    }
+
+
+    private fun onLongClickItem() : Boolean {
+        popupManager?.show(this)
+        return true
+    }
+
+    private fun onClickItem(){
+        val position = ClipboardInputManager.getInstance().getPositionOfView(this)
+        val instance = FlorisClipboardManager.getInstance()
+        val canPaste = instance.canBePasted(instance.peekHistoryOrPin(position))
+        if (canPaste) {
+            instance.pasteItem(position)
+        }else {
+            Toast.makeText(context, context.getString(R.string.clip__cant_paste), Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    fun setPinned() {
+        val view = findViewById<TextView>(R.id.clipboard_history_item_text)
+        view?.run {
+            val params = layoutParams as LayoutParams
+            params.marginEnd = resources.getDimensionPixelSize(R.dimen.clipboard_text_item_pin_margin)
+            layoutParams = params
+        }
+        findViewById<ImageView>(R.id.clipboard_pin).visibility = VISIBLE
+        invalidate()
+        val themeManager = ThemeManager.default()
+        onThemeUpdated(themeManager.activeTheme)
+    }
+
+    fun setUnpinned(){
+        val view = findViewById<TextView>(R.id.clipboard_history_item_text)
+        // if text view, also update margin.
+        view?.run {
+            val params = layoutParams as LayoutParams
+            params.marginEnd = 0
+            layoutParams = params
+            invalidate()
+        }
+        findViewById<ImageView>(R.id.clipboard_pin).visibility = INVISIBLE
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/ClipboardHistoryView.kt

@@ -0,0 +1,71 @@
+package dev.patrickgold.florisboard.ime.clip
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.ImageButton
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.theme.Theme
+import dev.patrickgold.florisboard.ime.theme.ThemeManager
+import kotlin.math.roundToInt
+
+
+class ClipboardHistoryView : LinearLayout, FlorisBoard.EventListener,
+    ThemeManager.OnThemeUpdatedListener {
+    private val florisboard: FlorisBoard? = FlorisBoard.getInstanceOrNull()
+    private val themeManager: ThemeManager = ThemeManager.default()
+
+    var backButton: ImageButton? = null
+        private set
+
+    var clipText: TextView? = null
+        private set
+
+    var clipboardBar: LinearLayout? = null
+        private set
+
+    private var clipboardHistory: RecyclerView? = null
+
+    private var clearAll: ImageButton? = null
+
+    constructor(context: Context) : this(context, null)
+    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
+    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+        florisboard?.addEventListener(this)
+        themeManager.registerOnThemeUpdatedListener(this)
+        backButton = findViewById(R.id.back_to_keyboard_button)
+        clipText = findViewById(R.id.clipboard_text)
+        clipboardBar = findViewById(R.id.clipboard_bar)
+        clipboardHistory = findViewById(R.id.clipboard_history_items)
+        clearAll = findViewById(R.id.clear_clipboard_history)
+
+        onApplyThemeAttributes()
+        // lord alone knows why it doesn't work without this..
+        onThemeUpdated(themeManager.activeTheme)
+    }
+
+    override fun onDetachedFromWindow() {
+        themeManager.unregisterOnThemeUpdatedListener(this)
+        florisboard?.removeEventListener(this)
+        super.onDetachedFromWindow()
+    }
+
+    override fun onThemeUpdated(theme: Theme) {
+        val fgColor = theme.getAttr(Theme.Attr.KEY_FOREGROUND).toSolidColor().color
+        clipText?.setTextColor(fgColor)
+        backButton?.drawable?.setTint(fgColor)
+        clearAll?.setColorFilter(fgColor)
+    }
+
+    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+        val height = florisboard?.inputView?.desiredMediaKeyboardViewHeight ?: 0.0f
+        super.onMeasure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height.roundToInt(), MeasureSpec.EXACTLY))
+    }
+
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/ClipboardInputManager.kt

@@ -0,0 +1,218 @@
+package dev.patrickgold.florisboard.ime.clip
+
+import android.annotation.SuppressLint
+import android.os.Handler
+import android.os.Looper
+import android.view.MotionEvent
+import android.view.View
+import android.widget.*
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.StaggeredGridLayoutManager
+import dev.patrickgold.florisboard.BuildConfig
+import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.clip.provider.ClipboardItem
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.core.InputKeyEvent
+import dev.patrickgold.florisboard.ime.core.InputView
+import dev.patrickgold.florisboard.ime.text.key.KeyCode
+import dev.patrickgold.florisboard.ime.text.key.KeyData
+import kotlinx.coroutines.*
+import kotlin.math.pow
+
+/**
+ * Handles the clipboard view and allows for communication between UI and logic.
+ */
+class ClipboardInputManager private constructor() : CoroutineScope by MainScope(),
+    FlorisBoard.EventListener{
+
+    private val florisboard = FlorisBoard.getInstance()
+    private var repeatedKeyPressHandler: Handler? = null
+    private var recyclerView: RecyclerView? = null
+    private var adapter: ClipboardHistoryItemAdapter? = null
+
+    companion object {
+        private var instance: ClipboardInputManager? = null
+
+        @Synchronized
+        fun getInstance(): ClipboardInputManager {
+            if (instance == null) {
+                instance = ClipboardInputManager()
+            }
+            return instance!!
+        }
+    }
+
+    init {
+        florisboard.addEventListener(this)
+    }
+
+    override fun onCreateInputView() {
+        super.onCreateInputView()
+        repeatedKeyPressHandler = Handler(florisboard.context.mainLooper)
+    }
+
+    /**
+     * Called when a new input view has been registered. Used to initialize all media-relevant
+     * views and layouts.
+     */
+    @SuppressLint("ClickableViewAccessibility")
+    override fun onRegisterInputView(inputView: InputView) {
+
+        launch(Dispatchers.Default) {
+
+            inputView.findViewById<ImageButton>(R.id.back_to_keyboard_button)
+                .setOnTouchListener { view, event -> onButtonPressEvent(view, event) }
+
+            inputView.findViewById<ImageButton>(R.id.clear_clipboard_history)
+                .setOnTouchListener { view, event -> onButtonPressEvent(view, event) }
+
+            recyclerView = inputView.findViewById(R.id.clipboard_history_items)
+
+            if (BuildConfig.DEBUG && adapter == null) {
+                error("initClipboard() not called")
+            }
+
+            recyclerView!!.adapter = adapter
+            val manager = StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL)
+            recyclerView!!.layoutManager = manager
+        }
+    }
+
+    /**
+     * Clean-up of resources and stopping all coroutines.
+     */
+    override fun onDestroy() {
+
+        cancel()
+        instance = null
+    }
+
+
+    /**
+     * Returns a reference to the [ClipboardHistoryView]
+     */
+    fun getClipboardHistoryView() : ClipboardHistoryView{
+        return FlorisBoard.getInstance().inputView?.mainViewFlipper?.getChildAt(2) as ClipboardHistoryView
+    }
+
+    /**
+     * Returns the adapter position of the view, i.e the position that the item is displayed at (including pins and
+     * history items).
+     *
+     * @param view The ClipboardHistoryItemView whose position is to be determined.
+     * @return The adapter position of the view
+     */
+    fun getPositionOfView(view: View): Int {
+        return recyclerView?.getChildLayoutPosition(view)!!
+    }
+
+    /**
+     * Notify adapter that an item was inserted.
+     *
+     * @param position The position the item was inserted at
+     */
+    fun notifyItemInserted(position: Int) = adapter?.notifyItemInserted(position)
+
+    /**
+     * Notify adapter that an item was removed
+     * @param position The position the item was removed from
+     */
+    fun notifyItemRemoved(position: Int) = adapter?.notifyItemRemoved(position)
+
+    /**
+     * Notify adapter that an item range was removed.
+     * @param start The index the range starts at (inclusive)
+     * @param numberOfItems The number of items removed
+     */
+    fun notifyItemRangeRemoved(start: Int, numberOfItems: Int) = adapter?.notifyItemRangeRemoved(start, numberOfItems)
+
+    /**
+     * Notify adapter that an item was moved
+     * @param from The original position
+     * @param to The final position
+     */
+    fun notifyItemMoved(from: Int, to: Int) = adapter?.notifyItemMoved(from, to)
+
+    /**
+     * Notify adapter that an item was changed.
+     *
+     * @param i The position of the item
+     */
+    fun notifyItemChanged(i: Int) = adapter?.notifyItemChanged(i)
+
+    /**
+     * Handles clicks on the back to keyboard button.
+     */
+    private fun onButtonPressEvent(view: View, event: MotionEvent?): Boolean {
+
+        event ?: return false
+        val data = when (view.id) {
+            R.id.back_to_keyboard_button -> KeyData(code = KeyCode.SWITCH_TO_TEXT_CONTEXT)
+            R.id.clear_clipboard_history -> KeyData(code = KeyCode.CLEAR_CLIPBOARD_HISTORY)
+            else -> null
+        }!!
+        when (event.actionMasked) {
+            MotionEvent.ACTION_DOWN -> {
+                florisboard.keyPressVibrate()
+                florisboard.keyPressSound(data)
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.down(data))
+            }
+            MotionEvent.ACTION_UP -> {
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.up(data))
+            }
+            MotionEvent.ACTION_CANCEL -> {
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.cancel(data))
+            }
+        }
+
+        // MUST return false here so the background selector for showing a transparent bg works
+        return false
+    }
+
+    /**
+     * [recyclerView] will be linked to [dataSet] and [pins] when initialized.
+     *
+     * @param dataSet the data set to link to
+     * @param pins The pins to link to
+     */
+    fun initClipboard(dataSet: ArrayDeque<FlorisClipboardManager.TimedClipData>, pins: ArrayDeque<ClipboardItem>) {
+        this.adapter =  ClipboardHistoryItemAdapter(dataSet = dataSet, pins= pins)
+    }
+
+    /**
+     * Plays an animation of all items moving off the the clipboard from the top.
+     *
+     * @param start The index to start at (to ignore pins)
+     * @param size The size of the clipboard
+     * @return The time in millis till the last animation will complete.
+     */
+    fun clearClipboardWithAnimation(start: Int, size: Int): Long {
+        // list of views to animate
+        val views = arrayListOf<View>()
+        for(i in 0 until size){
+            recyclerView?.findViewHolderForLayoutPosition(i + start)?.let {
+                views.add(it.itemView)
+            }
+        }
+
+        // animate the views
+        var delay = 1L
+        for (view in views) {
+            delay += (10 * delay.toDouble().pow(0.1)).toLong()
+            val an = view.animate().translationX(1500f)
+            an.startDelay = delay
+            an.duration = 250
+        }
+
+        // a little while later we reset the views so they can be reused.
+        Handler(Looper.getMainLooper()).postDelayed({
+            for (view in views) {
+                view.translationX = 0f
+            }
+        }, 450 + delay)
+
+        return 280 + delay
+    }
+
+
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/ClipboardPopupManager.kt

@@ -0,0 +1,127 @@
+package dev.patrickgold.florisboard.ime.clip
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.widget.LinearLayout
+import android.widget.Space
+import android.widget.TextView
+import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.popup.PopupLayerView
+import kotlin.math.max
+
+class ClipboardPopupManager(private val keyboardView: ClipboardHistoryView,
+                            private val popupLayerView: PopupLayerView?,
+                            private val clipboardHistoryItem: ClipboardHistoryItemView) {
+
+    private val popupView: ClipboardPopupView = LayoutInflater.from(keyboardView.context).inflate(R.layout.clip_popup_layout, null) as ClipboardPopupView
+    private var width = 0
+    private var height = 0
+    private var xOffset = 0
+    private var yOffset = 0
+
+
+    init {
+        popupLayerView?.addView(popupView)
+    }
+
+
+    private fun pinButtonListener() {
+        val pos = ClipboardInputManager.getInstance().getPositionOfView(clipboardHistoryItem)
+        val pinned = FlorisClipboardManager.getInstance().isPinned(pos)
+        if (pinned) {
+            FlorisClipboardManager.getInstance().unpinClip(pos)
+            hide()
+        } else {
+            FlorisClipboardManager.getInstance().pinClip(pos)
+            hide()
+        }
+    }
+
+    /**
+     * Show a popup.
+     */
+    fun show(view: ClipboardHistoryItemView) {
+        val pinButton = popupView.findViewById<LinearLayout>(R.id.pin_clip_item)
+        pinButton.setOnClickListener {
+            pinButtonListener()
+        }
+
+        val pos = ClipboardInputManager.getInstance().getPositionOfView(clipboardHistoryItem)
+        val pinned = FlorisClipboardManager.getInstance().isPinned(pos)
+
+        if (pinned) {
+            pinButton.findViewById<TextView>(R.id.pin_clip_item_text).text = view.context.getString(R.string.clip__unpin_item)
+        }
+
+        val delete = popupView.findViewById<LinearLayout>(R.id.remove_from_history)
+        delete.setOnClickListener {
+            FlorisClipboardManager.getInstance().removeClip(pos)
+            hide()
+        }
+
+        val clipboardManager = FlorisClipboardManager.getInstance()
+        val clipItem = clipboardManager.peekHistoryOrPin(pos)
+        val pasteShouldBeEnabled = FlorisClipboardManager.getInstance().canBePasted(clipItem)
+        // the clipboard item has any of the supported mime types of the editor OR is plain text.
+
+        val paste = popupView.findViewById<LinearLayout>(R.id.paste_clip_item)
+        if (pasteShouldBeEnabled) {
+            paste.setOnClickListener {
+                FlorisClipboardManager.getInstance().pasteItem(pos)
+                hide()
+            }
+            popupView.findViewById<Space>(R.id.paste_clip_item_space).visibility = VISIBLE
+            paste.visibility = VISIBLE
+        }else {
+            popupView.findViewById<Space>(R.id.paste_clip_item_space).visibility = GONE
+            paste.visibility = GONE
+        }
+
+        FlorisBoard.getInstance().isClipboardContextMenuShown = true
+        popupLayerView?.clipboardPopupManager = this
+        popupLayerView?.intercept = popupView
+        calc(view)
+
+        popupView.properties.let {
+            it.width = this.width
+            it.height = this.height
+            it.xOffset = this.xOffset
+            it.yOffset = this.yOffset
+        }
+        popupView.show(keyboardView)
+    }
+
+    /**
+     * Calculate sizes of popup.
+     */
+    private fun calc(view: ClipboardHistoryItemView) {
+        val widthMeasureSpec: Int = View.MeasureSpec.makeMeasureSpec(view.width, View.MeasureSpec.AT_MOST)
+        val heightMeasureSpec: Int = View.MeasureSpec.makeMeasureSpec(100000, View.MeasureSpec.AT_MOST)
+        popupView.invalidate()
+        popupView.measure(widthMeasureSpec, heightMeasureSpec)
+
+        width = view.width * 4 / 5
+        height = popupView.measuredHeight
+        xOffset = view.x.toInt() + (view.width - width) / 2
+        // y offset is either where the top of the item is OR if the top is off screen, the top of the keyboard.
+        yOffset = max(view.y.toInt() - keyboardView.height - height / 2 - 20, keyboardView.y.toInt() - keyboardView.height - height / 2 - 20)
+    }
+
+    /**
+     * Hides a popup.
+     */
+    fun hide() {
+        popupView.hide()
+        popupLayerView?.intercept = null
+        popupLayerView?.clipboardPopupManager = null
+        FlorisBoard.getInstance().isClipboardContextMenuShown = false
+
+        popupView.apply {
+            visibility = GONE
+        }
+
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/ClipboardPopupView.kt

@@ -0,0 +1,130 @@
+package dev.patrickgold.florisboard.ime.clip
+
+import android.content.Context
+import android.graphics.drawable.PaintDrawable
+import android.util.AttributeSet
+import android.view.View
+import android.widget.FrameLayout
+import android.widget.ImageView
+import android.widget.LinearLayout
+import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.theme.Theme
+import dev.patrickgold.florisboard.ime.theme.ThemeManager
+import dev.patrickgold.florisboard.util.ViewLayoutUtils
+
+class ClipboardPopupView: LinearLayout, ThemeManager.OnThemeUpdatedListener {
+
+    constructor(context: Context) : this(context, null)
+    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
+    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(
+        context,
+        attrs,
+        defStyleAttr
+    )
+
+    private var backgroundDrawable: PaintDrawable = PaintDrawable().apply {
+        setCornerRadius(ViewLayoutUtils.convertDpToPixel(6.0f, context))
+    }
+    private val themeManager: ThemeManager = ThemeManager.default()
+
+    val properties: Properties = Properties(
+        width = 0,
+        height = 0,
+        xOffset = 0,
+        yOffset = 0
+    )
+    private val isShowing: Boolean
+        get() = visibility == VISIBLE
+
+    init {
+        visibility = GONE
+        background = backgroundDrawable
+    }
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+        themeManager.registerOnThemeUpdatedListener(this)
+    }
+
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        themeManager.unregisterOnThemeUpdatedListener(this)
+    }
+
+    override fun onThemeUpdated(theme: Theme) {
+        backgroundDrawable.apply {
+            setTint(theme.getAttr(Theme.Attr.POPUP_BACKGROUND).toSolidColor().color)
+        }
+
+        this.findViewById<ImageView>(R.id.pin_clip_item_icon).drawable.apply {
+            setTint(theme.getAttr(Theme.Attr.WINDOW_TEXT_COLOR).toSolidColor().color)
+        }
+
+
+        this.findViewById<ImageView>(R.id.remove_from_history_icon).drawable.apply {
+            setTint(theme.getAttr(Theme.Attr.WINDOW_TEXT_COLOR).toSolidColor().color)
+        }
+
+        this.findViewById<ImageView>(R.id.paste_clip_item_icon).drawable.apply {
+            setTint(theme.getAttr(Theme.Attr.WINDOW_TEXT_COLOR).toSolidColor().color)
+        }
+
+        if (isShowing) {
+            invalidate()
+        }
+    }
+
+    private fun applyProperties(anchor: View) {
+        val anchorCoords = IntArray(2)
+        anchor.getLocationInWindow(anchorCoords)
+        val anchorX = anchorCoords[0]
+        val anchorY = anchorCoords[1] + anchor.measuredHeight
+        when (val lp = layoutParams) {
+            is FrameLayout.LayoutParams -> lp.apply {
+                width = properties.width
+                height = properties.height
+                setMargins(
+                    anchorX + properties.xOffset,
+                    anchorY + properties.yOffset,
+                    0,
+                    0
+                )
+            }
+            else -> {
+                layoutParams = FrameLayout.LayoutParams(properties.width, properties.height).apply {
+                    setMargins(
+                        anchorX + properties.xOffset,
+                        anchorY + properties.yOffset,
+                        0,
+                        0
+                    )
+                }
+            }
+        }
+        if (isShowing) {
+            requestLayout()
+            invalidate()
+        }
+    }
+
+    fun show(anchor: View) {
+        applyProperties(anchor)
+        visibility = VISIBLE
+        requestLayout()
+        invalidate()
+    }
+
+    fun hide() {
+        visibility = GONE
+        requestLayout()
+        invalidate()
+    }
+
+    data class Properties(
+        var width: Int,
+        var height: Int,
+        var xOffset: Int,
+        var yOffset: Int
+    )
+
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/FlorisClipboardManager.kt

@@ -0,0 +1,401 @@
+package dev.patrickgold.florisboard.ime.clip
+
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.Context.CLIPBOARD_SERVICE
+import android.os.Handler
+import android.os.Looper
+import dev.patrickgold.florisboard.ime.clip.provider.*
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.core.PrefHelper
+import dev.patrickgold.florisboard.util.cancelAll
+import dev.patrickgold.florisboard.util.postAtScheduledRate
+import timber.log.Timber
+import java.io.Closeable
+import java.util.*
+import java.util.concurrent.ExecutorService
+import kotlin.collections.ArrayDeque
+
+/**
+ * [FlorisClipboardManager] manages the clipboard and clipboard history.
+ *
+ * Also just going to document how all the classes here work.
+ *
+ * [FlorisClipboardManager] handles storage and retrieval of clipboard items. All manipulation of the
+ * clipboard goes through here.
+ *
+ * [ClipboardInputManager] handles the input view and allows for communication between UI and logic
+ *
+ * [ClipboardHistoryView] is the view representing the clipboard context. Only does some theme stuff.
+ *
+ * [ClipboardHistoryItemView] is the view representing an item in the clipboard history (either image or text). Only
+ * does UI stuff.
+ *
+ * [ClipboardHistoryItemAdapter] is the recyclerview adapter that backs the clipboard history.
+ *
+ * [ClipboardPopupManager] handles the popups for each [ClipboardHistoryItemView] (each item has its own popup manager)
+ *
+ * [ClipboardPopupView] is the view representing a popup displayed when long pressing on a clipboard history item.
+ */
+class FlorisClipboardManager private constructor() : ClipboardManager.OnPrimaryClipChangedListener, Closeable {
+
+    private lateinit var pinsDao: PinnedClipboardItemDao
+    lateinit var executor: ExecutorService
+
+    // Using ArrayDeque because it's "technically" the correct data structure (I think).
+    // Newest stored first, oldest stored last.
+    private var history: ArrayDeque<TimedClipData> = ArrayDeque()
+    private var pins: ArrayDeque<ClipboardItem> = ArrayDeque()
+    private var current: ClipboardItem? = null
+    private var onPrimaryClipChangedListeners: ArrayList<OnPrimaryClipChangedListener> = arrayListOf()
+    private lateinit var systemClipboardManager: ClipboardManager
+    private lateinit var handler: Handler
+    private lateinit var prefHelper: PrefHelper
+
+    data class TimedClipData(val data: ClipboardItem, val timeUTC: Long)
+
+    interface OnPrimaryClipChangedListener {
+        fun onPrimaryClipChanged()
+    }
+
+    companion object {
+        private var instance: FlorisClipboardManager? = null
+
+        // 1 minute
+        private const val INTERVAL = 60 * 1000L
+
+        @Synchronized
+        fun getInstance(): FlorisClipboardManager {
+            if (instance == null) {
+                instance = FlorisClipboardManager()
+            }
+            return instance!!
+        }
+        /**
+         * Taken from ClipboardDescription.java from the AOSP
+         *
+         * Helper to compare two MIME types, where one may be a pattern.
+         * @param concreteType A fully-specified MIME type.
+         * @param desiredType A desired MIME type that may be a pattern such as * / *.
+         * @return Returns true if the two MIME types match.
+         */
+        fun compareMimeTypes(concreteType: String, desiredType: String): Boolean {
+            val typeLength = desiredType.length
+            if (typeLength == 3 && desiredType == "*/*") {
+                return true
+            }
+            val slashpos = desiredType.indexOf('/')
+            if (slashpos > 0) {
+                if (typeLength == slashpos + 2 && desiredType[slashpos + 1] == '*') {
+                    if (desiredType.regionMatches(0, concreteType, 0, slashpos + 1)) {
+                        return true
+                    }
+                } else if (desiredType == concreteType) {
+                    return true
+                }
+            }
+            return false
+        }
+    }
+
+
+    /**
+     * Adds a new item to the clipboard history (if enabled).
+     */
+    fun updateHistory(newData: ClipboardItem) {
+        val clipboardPrefs = prefHelper.clipboard
+
+        if (clipboardPrefs.enableHistory) {
+            if (clipboardPrefs.limitHistorySize) {
+                var numRemoved = 0
+                while (history.size >= clipboardPrefs.maxHistorySize) {
+                    numRemoved += 1
+                    history.removeLast().data.close()
+                }
+                ClipboardInputManager.getInstance().notifyItemRangeRemoved(history.size, numRemoved)
+            }
+
+
+            val timed = TimedClipData(newData, System.currentTimeMillis())
+            history.addFirst(timed)
+            ClipboardInputManager.getInstance().notifyItemInserted(pins.size)
+        }
+
+    }
+
+    /**
+     * Used so that [onPrimaryClipChanged] knows whether it was called by [changeCurrent] (and hence shouldn't update
+     * history)
+     */
+    private var shouldUpdateHistory = true
+
+    /**
+     * Changes current clipboard item. WITHOUT updating the history.
+     */
+    fun changeCurrent(newData: ClipboardItem, closePrevious: Boolean) {
+        if (prefHelper.clipboard.enableInternal) {
+            if (closePrevious) current?.close()
+            current = newData
+            val isEqual = when (newData.type) {
+                ItemType.TEXT -> newData.text == systemClipboardManager.primaryClip?.getItemAt(0)?.text
+                ItemType.IMAGE -> newData.uri == systemClipboardManager.primaryClip?.getItemAt(0)?.uri
+            }
+            if (prefHelper.clipboard.syncToSystem && !isEqual)
+                systemClipboardManager.setPrimaryClip(newData.toClipData())
+        } else {
+            shouldUpdateHistory = false
+            systemClipboardManager.setPrimaryClip(newData.toClipData())
+        }
+        onPrimaryClipChangedListeners.forEach { it.onPrimaryClipChanged() }
+    }
+
+
+    /**
+     * Change the current text on clipboard, update history (if enabled).
+     *
+     */
+    fun addNewClip(newData: ClipboardItem) {
+        updateHistory(newData)
+        // If history is disabled, this new item will replace the old one and hence should be closed.
+        changeCurrent(newData, !prefHelper.clipboard.enableHistory)
+    }
+
+    /**
+     * Wraps some plaintext in a ClipData and calls [addNewClip]
+     */
+    fun addNewPlaintext(newText: String) {
+        val newData = ClipboardItem(null, ItemType.TEXT, null, newText, arrayOf("text/plain"))
+        addNewClip(newData)
+    }
+
+    val primaryClip: ClipboardItem?
+        get() = if (prefHelper.clipboard.enableInternal) {
+            current
+        } else {
+            systemClipboardManager.primaryClip?.let { ClipboardItem.fromClipData(it, false) }
+        }
+
+    fun peekHistory(index: Int): ClipboardItem? {
+        return history.getOrNull(index)?.data
+    }
+
+    fun addPrimaryClipChangedListener(listener: OnPrimaryClipChangedListener) {
+        onPrimaryClipChangedListeners.add(listener)
+    }
+
+    fun removePrimaryClipChangedListener(listener: OnPrimaryClipChangedListener) {
+        onPrimaryClipChangedListeners.remove(listener)
+    }
+
+    /**
+     * Called by system clipboard when the contents are changed
+     */
+    override fun onPrimaryClipChanged() {
+        // Run on async thread to avoid blocking.
+        if (systemClipboardManager.primaryClip?.getItemAt(0)?.text == null &&
+            systemClipboardManager.primaryClip?.getItemAt(0)?.uri == null) {
+            return
+        }
+
+        val isEqual = when (primaryClip?.type) {
+            ItemType.TEXT -> primaryClip?.text == systemClipboardManager.primaryClip?.getItemAt(0)?.text
+            ItemType.IMAGE -> primaryClip?.uri == systemClipboardManager.primaryClip?.getItemAt(0)?.uri
+            null -> false
+        }
+        systemClipboardManager.primaryClip?.let {
+            if (prefHelper.clipboard.enableInternal) {
+                // In the event that the internal clipboard is enabled, sync to internal clipboard is enabled
+                // and the item is not already in internal clipboard, add it.
+                if (prefHelper.clipboard.syncToFloris && !isEqual) {
+                    addNewClip(ClipboardItem.fromClipData(it, true))
+                }
+            } else if (prefHelper.clipboard.enableHistory) {
+                // in the event history is enabled, and it should be updated it is updated
+                if (shouldUpdateHistory) {
+                    updateHistory(ClipboardItem.fromClipData(it, false))
+                } else {
+                    shouldUpdateHistory = true
+                }
+            }
+        }
+    }
+
+
+    fun hasPrimaryClip(): Boolean {
+        return this.primaryClip != null
+    }
+
+    /**
+     * Cleans up.
+     *
+     * Sets [instance] to null for GC. Unregisters the system clipboard listener, cancels clipboard clean ups.
+     */
+    override fun close() {
+        systemClipboardManager.removePrimaryClipChangedListener(this)
+        handler.cancelAll()
+        instance = null
+    }
+
+    /**
+     * Initialize the floris clipboard manager. Exists to avoid dependency loop due to reference
+     * to [FlorisBoard.context]
+     *
+     * Sets up the clipboard cleanup task, links the recycler view in clipInputManager to [history].
+     *
+     * @param context Required to register as an onPrimaryClipChangedListener of ClipboardManager
+     */
+    fun initialize(context: Context) {
+
+        this.systemClipboardManager = (context.getSystemService(CLIPBOARD_SERVICE) as ClipboardManager)
+        systemClipboardManager.addPrimaryClipChangedListener(this)
+
+        prefHelper = PrefHelper.getDefaultInstance(context)
+
+        val cleanUpClipboard = Runnable {
+
+            if (!prefHelper.clipboard.cleanUpOld) {
+                return@Runnable
+            }
+
+            val currentTime = System.currentTimeMillis()
+            var numToPop = 0
+            val expiryTime = prefHelper.clipboard.cleanUpAfter * 60 * 1000
+            for (item in history.asReversed()) {
+                if (item.timeUTC + expiryTime < currentTime) {
+                    numToPop += 1
+                } else {
+                    break
+                }
+            }
+            for (i in 0 until numToPop) {
+                history.removeLast().data.close()
+            }
+            ClipboardInputManager.getInstance().notifyItemRangeRemoved(pins.size + history.size, numToPop)
+        }
+        FlorisBoard.getInstance().clipInputManager.initClipboard(this.history, this.pins)
+        handler = Handler(Looper.getMainLooper())
+        prefHelper
+        handler.postAtScheduledRate(0, INTERVAL, cleanUpClipboard)
+        executor = FlorisBoard.getInstance().asyncExecutor
+        executor.execute {
+            pinsDao = PinnedItemsDatabase.getInstance().clipboardItemDao()
+            pinsDao.getAll().toCollection(this.pins)
+            FlorisContentProvider.getInstance().initIfNotAlready()
+        }
+    }
+
+
+    /**
+     * Clears the history with an animation.
+     */
+    fun clearHistoryWithAnimation() {
+        val clipInputManager = FlorisBoard.getInstance().clipInputManager
+        val delay = clipInputManager.clearClipboardWithAnimation(pins.size, history.size)
+
+        handler.postDelayed({
+            val size = history.size
+            for (item in history) {
+                item.data.close()
+            }
+            history.clear()
+            clipInputManager.notifyItemRangeRemoved(pins.size, size)
+        }, delay)
+    }
+
+    fun pinClip(adapterPos: Int) {
+        val clipInputManager = FlorisBoard.getInstance().clipInputManager
+        val pin = history.removeAt(adapterPos - pins.size)
+        pins.addFirst(pin.data)
+        clipInputManager.notifyItemMoved(adapterPos, 0)
+        clipInputManager.notifyItemChanged(0)
+
+        executor.execute {
+            val uid = pinsDao.insert(pin.data)
+            pin.data.uid = uid
+        }
+    }
+
+    /**
+     * Get the item at a particular [adapterPos] (i.e the position the item is displayed at.)
+     */
+    fun peekHistoryOrPin(adapterPos: Int): ClipboardItem {
+        return when {
+            adapterPos < pins.size -> pins[adapterPos]
+            else -> history[adapterPos - pins.size].data
+        }
+    }
+
+
+    fun isPinned(position: Int): Boolean {
+        return when {
+            position < pins.size -> true
+            else -> false
+        }
+    }
+
+    fun unpinClip(adapterPos: Int) {
+        val clipInputManager = FlorisBoard.getInstance().clipInputManager
+        val item = pins.removeAt(adapterPos)
+
+        val clipboardPrefs = prefHelper.clipboard
+        if (clipboardPrefs.limitHistorySize) {
+            var numRemoved = 0
+            while (history.size >= clipboardPrefs.maxHistorySize) {
+                numRemoved += 1
+                history.removeLast().data.close()
+            }
+            ClipboardInputManager.getInstance().notifyItemRangeRemoved(history.size, numRemoved)
+        }
+
+        val timed = TimedClipData(item, System.currentTimeMillis())
+        history.addFirst(timed)
+
+        clipInputManager.notifyItemMoved(adapterPos, pins.size)
+        clipInputManager.notifyItemChanged(pins.size)
+
+        executor.execute {
+            pinsDao.delete(item)
+        }
+    }
+
+    fun removeClip(pos: Int) {
+        when {
+            pos < pins.size -> {
+                val item = pins.removeAt(pos)
+                executor.execute {
+                    Timber.d("removing pin")
+                    pinsDao.delete(item)
+                }
+                item.close()
+            }
+            else -> {
+                history.removeAt(pos - pins.size).data.close()
+            }
+        }
+        val clipboardInputManager = ClipboardInputManager.getInstance()
+        clipboardInputManager.notifyItemRemoved(pos)
+    }
+
+
+    fun pasteItem(pos: Int) {
+        val item = peekHistoryOrPin(pos)
+        FlorisBoard.getInstance().activeEditorInstance.commitClipboardItem(item)
+    }
+
+    /**
+     * Returns true if the editor can accept the clip item, else false.
+     */
+    fun canBePasted(clipItem: ClipboardItem?): Boolean {
+        if (clipItem == null) return false
+
+        return clipItem.mimeTypes.contains("text/plain") || FlorisBoard.getInstance().activeEditorInstance.contentMimeTypes?.any { editorType ->
+            clipItem.mimeTypes.any { clipType ->
+                if (editorType != null) {
+                    compareMimeTypes(clipType, editorType)
+                }else { false }
+            }
+        } == true
+    }
+
+
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/provider/FileStorage.kt

@@ -0,0 +1,75 @@
+package dev.patrickgold.florisboard.ime.clip.provider
+
+import android.net.Uri
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import timber.log.Timber
+import java.io.File
+
+/**
+ * Backend class which is used by [FlorisContentProvider] to serve content.
+ */
+class FileStorage private constructor() {
+
+
+    companion object {
+        private const val BUF_SIZE = 1024 * 8
+        private var instance: FileStorage? = null
+        private var offset = 0
+
+
+        fun getInstance() : FileStorage {
+            if (this.instance == null){
+                this.instance = FileStorage()
+            }
+            return instance!!
+        }
+
+    }
+
+
+    /**
+     * Clones a content URI to internal storage.
+     * @param uri The URI
+     * @return  the file's name which is a unique long
+     */
+    @Synchronized
+    fun cloneURI(uri: Uri) : Long {
+        val context = FlorisBoard.getInstance().context
+        // nanoTime + the number of items created so that it's unique.
+        val name = (System.nanoTime() + offset)
+
+        // Just a normal copy from input stream to output stream.
+        val source = context.contentResolver.openInputStream(uri)!!
+        val sink = File(context.filesDir, name.toString()).outputStream()
+        var nread = 0L
+        val buf = ByteArray(BUF_SIZE)
+        var n: Int
+        while (source.read(buf).also { n = it } > 0) {
+            sink.write(buf, 0, n)
+            nread += n.toLong()
+        }
+
+        source.close()
+        sink.close()
+
+        return name
+    }
+
+    /**
+     * Deletes the file corresponding to an id.
+     */
+    fun deleteById(id: Long) {
+        Timber.d("Cleaning up $id")
+        val file = File(FlorisBoard.getInstance().filesDir, id.toString())
+        file.delete()
+    }
+
+    /**
+     * Get the file address of an id.
+     */
+    fun getAddress(id: Long): String {
+        return FlorisBoard.getInstance().filesDir.toString() + "/$id"
+    }
+
+
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/provider/FlorisContentProvider.kt

@@ -0,0 +1,132 @@
+package dev.patrickgold.florisboard.ime.clip.provider
+
+import android.content.*
+import android.database.Cursor
+import android.net.Uri
+import android.os.ParcelFileDescriptor
+import androidx.room.Room
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import timber.log.Timber
+import java.io.File
+import java.util.concurrent.ExecutorService
+
+/**
+ * Allows apps to access images on the clipboard.
+ *
+ * This is sometimes called by the UI thread, so all functions are non blocking.
+ * Database accesses are performed async.
+ */
+class FlorisContentProvider : ContentProvider() {
+    private lateinit var fileUriDao: FileUriDao
+    private val mimeTypes: HashMap<Long, Array<String>> = hashMapOf()
+    private lateinit var executor: ExecutorService
+
+    override fun onCreate(): Boolean {
+        instance = this
+        return true
+    }
+
+    fun initIfNotAlready(){
+        if (this::fileUriDao.isInitialized){
+            return
+        }
+
+
+        fileUriDao = Room.databaseBuilder(
+            context!!,
+            FileUriDatabase::class.java, "fileuridb"
+        ).build().fileUriDao()
+
+        executor = FlorisBoard.getInstance().asyncExecutor
+        for (fileUri in fileUriDao.getAll()) {
+            mimeTypes[fileUri.fileName] = fileUri.mimeTypes
+        }
+    }
+
+    override fun query(
+        uri: Uri,
+        projection: Array<out String>?,
+        selection: String?,
+        selectionArgs: Array<out String>?,
+        sortOrder: String?
+    ): Cursor? {
+        // just return nothing, nothing should call this function at all.
+        return null
+    }
+
+    override fun getType(uri: Uri): String {
+        return when (matcher.match(uri)) {
+            CLIP_ITEM -> mimeTypes.getOrElse(ContentUris.parseId(uri), { throw IllegalArgumentException("Don't have this item!") })[0]
+            CLIPS_TABLE -> "vnd.android.cursor.dir/$AUTHORITY.clip"
+            else -> throw IllegalArgumentException("Don't know what this is $uri")
+        }
+    }
+
+    override fun openFile(uri: Uri, mode: String): ParcelFileDescriptor {
+        val id = ContentUris.parseId(uri)
+        val path = File(FileStorage.getInstance().getAddress(id))
+
+        // Nothing has permission to write anyway.
+        return ParcelFileDescriptor.open(path, ParcelFileDescriptor.MODE_READ_ONLY)
+    }
+
+    override fun insert(uri: Uri, values: ContentValues?): Uri {
+        when (matcher.match(uri)){
+            CLIPS_TABLE -> {
+                val id = FileStorage.getInstance().cloneURI(Uri.parse(values?.getAsString("uri")))
+                val mimes =  values?.getAsString("mimetypes")?.split(",")?.toTypedArray()
+                mimes?.let {
+                    mimeTypes[id] = mimes
+                    executor.execute {
+                        Timber.d("Inserted file uri $id")
+                        fileUriDao.insert(FileUri(id, mimes))
+                    }
+                }
+
+                return ContentUris.withAppendedId(CLIPS_URI, id)
+            }
+            else -> throw IllegalArgumentException("Don't know what this is $uri")
+        }
+    }
+
+    override fun delete(uri: Uri, selection: String?, selectionArgs: Array<out String>?): Int {
+        when (matcher.match(uri)){
+            CLIP_ITEM -> {
+                val id = ContentUris.parseId(uri)
+                FileStorage.getInstance().deleteById(id)
+                mimeTypes.remove(id)
+                context?.revokeUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                executor.execute {
+                    fileUriDao.delete(id)
+                }
+                return 1
+            }
+            else -> throw IllegalArgumentException("Don't know what this is $uri")
+        }
+    }
+
+    override fun update(uri: Uri, values: ContentValues?, selection: String?, selectionArgs: Array<out String>?): Int {
+        throw IllegalArgumentException("This ContentProvider does not support update.")
+    }
+
+
+    companion object {
+        private var instance: FlorisContentProvider? = null
+        const val AUTHORITY = "dev.patrickgold.florisboard.provider.clip"
+        val CONTENT_URI: Uri = Uri.parse("content://$AUTHORITY")
+        val CLIPS_URI: Uri = Uri.parse("content://$AUTHORITY/clips")
+
+        fun getInstance(): FlorisContentProvider {
+            return instance!!
+        }
+
+        private const val CLIPS_TABLE = 1
+        private const val CLIP_ITEM = 0
+
+        val matcher: UriMatcher = UriMatcher(UriMatcher.NO_MATCH).apply {
+            addURI(AUTHORITY, "clips/#", CLIP_ITEM)
+            addURI(AUTHORITY, "clips", CLIPS_TABLE)
+        }
+
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/clip/provider/FlorisDatabase.kt

@@ -0,0 +1,242 @@
+package dev.patrickgold.florisboard.ime.clip.provider
+
+import android.content.ClipData
+import android.content.ContentValues
+import android.net.Uri
+import android.provider.BaseColumns
+import androidx.room.*
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import java.io.Closeable
+
+
+enum class ItemType(val value: Int) {
+    TEXT(1),
+    IMAGE(2);
+
+    companion object {
+        fun fromInt(value : Int) : ItemType {
+            return values().first { it.value == value }
+        }
+    }
+}
+
+
+/**
+ * Represents an item on the clipboard.
+ * The URI stored belongs to FlorisContentProvider, not whatever app copied the image
+ *
+ * If type == ItemType.IMAGE there must be a uri set
+ * if type == ItemType.TEXT there must be a text set
+ */
+@Entity(tableName = "pins")
+data class ClipboardItem(
+    /** Only used for pins */
+    @PrimaryKey(autoGenerate = true) @ColumnInfo(name=BaseColumns._ID, index=true) var uid: Long?,
+    val type: ItemType,
+    val uri: Uri?,
+    val text: String?,
+    val mimeTypes: Array<String>) : Closeable{
+
+    /**
+     * Creates a new ClipData which has the same contents as this.
+     */
+    fun toClipData(): ClipData {
+        return when (type) {
+            ItemType.IMAGE -> {
+                ClipData.newUri(FlorisBoard.getInstance().context.contentResolver, "Clipboard data", uri)
+            }
+            ItemType.TEXT -> {
+                ClipData.newPlainText("Clipboard data", text)
+            }
+        }
+    }
+
+    /**
+     * Instructs the content provider to delete this URI. If not an image, is a noop
+     */
+    override fun close() {
+        if (type == ItemType.IMAGE) {
+            FlorisBoard.getInstance().context.contentResolver.delete(this.uri!!, null, null)
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as ClipboardItem
+
+        if (uid != other.uid) return false
+        if (type != other.type) return false
+        if (uri != other.uri) return false
+        if (text != other.text) return false
+        if (!mimeTypes.contentEquals(other.mimeTypes)) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = uid.hashCode()
+        result = 31 * result + type.hashCode()
+        result = 31 * result + (uri?.hashCode() ?: 0)
+        result = 31 * result + (text?.hashCode() ?: 0)
+        result = 31 * result + mimeTypes.contentHashCode()
+        return result
+    }
+
+    companion object {
+        /**
+         * Returns a new ClipboardItem based on a ClipData
+         *
+         * @param data The ClipData to clone.
+         * @param cloneUri Whether to store the image using [FlorisContentProvider].
+         */
+        fun fromClipData(data: ClipData, cloneUri: Boolean) : ClipboardItem {
+
+            val type = when {
+                data.getItemAt(0)?.uri != null -> ItemType.IMAGE
+                data.getItemAt(0)?.text != null -> ItemType.TEXT
+                else -> null
+            }!!
+
+            val uri = if (type == ItemType.IMAGE) {
+                    if (data.getItemAt(0).uri.authority == FlorisContentProvider.CONTENT_URI.authority || !cloneUri){
+                        data.getItemAt(0).uri
+                    }else {
+                        val values = ContentValues().apply{
+                            put("uri", data.getItemAt(0).uri.toString())
+                            put("mimetypes", data.description.filterMimeTypes("*/*").joinToString(","))
+                        }
+                        FlorisBoard.getInstance().context.contentResolver.insert(FlorisContentProvider.CLIPS_URI, values)
+                    }
+            }else { null }
+
+            val text = data.getItemAt(0).text?.toString()
+            val mimeTypes = Array(data.description.mimeTypeCount) { "" }
+
+            (0 until data.description.mimeTypeCount).forEach {
+                    mimeTypes[it] = data.description.getMimeType(it)
+            }
+
+            return ClipboardItem(null, type, uri, text, mimeTypes)
+        }
+    }
+}
+
+class Converters {
+    @TypeConverter
+    fun uriFromString(value: String?): Uri? {
+        return Uri.parse(value)
+    }
+
+    @TypeConverter
+    fun stringFromUri(value: Uri?): String {
+        return value.toString()
+    }
+
+    @TypeConverter
+    fun itemTypeToInt(value: ItemType?): Int? {
+        return value?.value
+    }
+
+    @TypeConverter
+    fun intToItemType(value: Int?): ItemType? {
+        return value?.let { ItemType.fromInt(it) }
+    }
+
+    /**
+     * Only works because the string array is a mimetype.
+     * DOES NOT USE A GENERALIZED FORMAT.
+     */
+    @TypeConverter
+    fun mimeTypesToString(mimeTypes: Array<String>): String {
+        return mimeTypes.joinToString(",")
+    }
+    @TypeConverter
+    fun stringToMimeTypes(value: String): Array<String> {
+        return value.split(",").toTypedArray()
+    }
+}
+
+
+@Dao
+interface PinnedClipboardItemDao {
+    @Query("SELECT * FROM pins")
+    fun getAll(): List<ClipboardItem>
+
+    @Insert
+    fun insert(item: ClipboardItem) : Long
+
+    @Delete
+    fun delete(item: ClipboardItem)
+}
+
+@Database(entities = [ClipboardItem::class], version = 1)
+@TypeConverters(Converters::class)
+abstract class PinnedItemsDatabase : RoomDatabase() {
+    abstract fun clipboardItemDao() : PinnedClipboardItemDao
+
+    companion object {
+        private var instance: PinnedItemsDatabase? = null
+
+        fun getInstance(): PinnedItemsDatabase {
+
+            if (instance == null) {
+                instance = Room.databaseBuilder(
+                    FlorisBoard.getInstance().context,
+                    PinnedItemsDatabase::class.java,
+                    "pins").build()
+            }
+
+            return instance!!
+        }
+    }
+}
+
+@Entity(tableName = "file_uris")
+data class FileUri(
+    @PrimaryKey @ColumnInfo(name=BaseColumns._ID, index=true) val fileName: Long,
+    val mimeTypes: Array<String>
+) {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as FileUri
+
+        if (fileName != other.fileName) return false
+        if (!mimeTypes.contentEquals(other.mimeTypes)) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = 31 + fileName.hashCode()
+        result = 31 * result + mimeTypes.contentHashCode()
+        return result
+    }
+}
+
+@Dao
+interface FileUriDao {
+    @Query("SELECT * FROM file_uris WHERE ${BaseColumns._ID} == (:uid)")
+    fun getById(uid: Long) : FileUri
+
+    @Query("DELETE FROM file_uris WHERE ${BaseColumns._ID} == (:id)")
+    fun delete(id: Long)
+
+    @Insert
+    fun insert(vararg fileUris: FileUri)
+
+    @Query("SELECT COUNT(*) FROM file_uris WHERE ${BaseColumns._ID} == (:id)")
+    fun numberWithId(id: Long): Int
+
+    @Query("SELECT * FROM file_uris")
+    fun getAll(): List<FileUri>
+}
+
+@Database(entities = [FileUri::class], version = 1)
+@TypeConverters(Converters::class)
+abstract class FileUriDatabase : RoomDatabase() {
+    abstract fun fileUriDao() : FileUriDao
+}

app/src/main/java/dev/patrickgold/florisboard/ime/core/FlorisActivity.kt

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.core
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.os.Bundle
+import androidx.annotation.StringRes
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import androidx.viewbinding.ViewBinding
+import com.google.android.material.snackbar.Snackbar
+import dev.patrickgold.florisboard.R
+
+abstract class FlorisActivity<V : ViewBinding> : AppCompatActivity() {
+    private var _binding: V? = null
+    protected val binding: V
+        get() = _binding!!
+
+    private var _prefs: PrefHelper? = null
+    protected val prefs: PrefHelper
+        get() = _prefs!!
+
+    private var errorDialog: AlertDialog? = null
+    private var errorSnackbar: Snackbar? = null
+    private var errorThrowable: Throwable? = null
+    private var messageSnackbar: Snackbar? = null
+
+    protected abstract fun onCreateBinding(): V
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        _prefs = PrefHelper.getDefaultInstance(applicationContext)
+        onCreateBinding().let {
+            _binding = it
+            setContentView(it.root)
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        _binding = null
+        _prefs = null
+        errorDialog?.dismiss()
+        errorDialog = null
+        errorSnackbar?.dismiss()
+        errorSnackbar = null
+        errorThrowable = null
+        messageSnackbar?.dismiss()
+        messageSnackbar = null
+    }
+
+    protected fun showMessage(@StringRes snackbarMessageResId: Int) {
+        val snackbarMessage = resources.getString(snackbarMessageResId)
+        showMessage(snackbarMessage)
+    }
+
+    protected fun showMessage(snackbarMessage: String) {
+        messageSnackbar?.dismiss()
+        messageSnackbar = Snackbar.make(binding.root, snackbarMessage, Snackbar.LENGTH_LONG).apply {
+            setAction(android.R.string.ok) {
+                messageSnackbar?.dismiss()
+            }
+            show() }
+    }
+
+    protected fun showError(throwable: Throwable) {
+        val snackbarMessage = resources.getString(R.string.assets__error__snackbar_message)
+        showError(snackbarMessage, throwable)
+    }
+
+    protected fun showError(@StringRes snackbarMessageResId: Int, throwable: Throwable) {
+        val snackbarMessage = resources.getString(snackbarMessageResId)
+        showError(snackbarMessage, throwable)
+    }
+
+    protected fun showError(snackbarMessage: String, throwable: Throwable) {
+        errorDialog?.dismiss()
+        errorDialog = null
+        errorSnackbar?.dismiss()
+        errorSnackbar = Snackbar.make(binding.root, snackbarMessage, Snackbar.LENGTH_LONG).apply {
+            setAction(R.string.assets__error__details) {
+                errorDialog?.dismiss()
+                errorDialog = AlertDialog.Builder(this@FlorisActivity).run {
+                    setTitle(R.string.assets__error__details)
+                    setMessage(errorThrowable.toString())
+                    setPositiveButton(android.R.string.ok, null)
+                    setNeutralButton(R.string.crash_dialog__copy_to_clipboard) { _, _ ->
+                        val clipboardManager = getSystemService(Context.CLIPBOARD_SERVICE)
+                        if (clipboardManager != null && clipboardManager is ClipboardManager) {
+                            clipboardManager.setPrimaryClip(ClipData.newPlainText(errorThrowable.toString(), errorThrowable.toString()))
+                        }
+                    }
+                    create()
+                    show()
+                }
+            }
+            show()
+        }
+        errorThrowable = throwable
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/core/FlorisApplication.kt

@@ -19,6 +19,7 @@ package dev.patrickgold.florisboard.ime.core
 import android.app.Application
 import dev.patrickgold.florisboard.BuildConfig
 import dev.patrickgold.florisboard.crashutility.CrashUtility
+import dev.patrickgold.florisboard.ime.dictionary.DictionaryManager
 import dev.patrickgold.florisboard.ime.extension.AssetManager
 import dev.patrickgold.florisboard.ime.theme.ThemeManager
 import timber.log.Timber
@@ -32,6 +33,7 @@ class FlorisApplication : Application() {
         CrashUtility.install(this)
         val prefHelper = PrefHelper.getDefaultInstance(this)
         val assetManager = AssetManager.init(this)
+        DictionaryManager.init(this)
         ThemeManager.init(this, assetManager, prefHelper)
         prefHelper.initDefaultPreferences()
     }

app/src/main/java/dev/patrickgold/florisboard/ime/core/FlorisBoard.kt

@@ -17,16 +17,17 @@
 package dev.patrickgold.florisboard.ime.core
 
 import android.annotation.SuppressLint
-import android.content.ClipboardManager
 import android.content.Context
 import android.content.Intent
-import android.content.res.ColorStateList
 import android.content.res.Configuration
 import android.graphics.Color
 import android.inputmethodservice.ExtractEditText
 import android.inputmethodservice.InputMethodService
 import android.media.AudioManager
-import android.os.*
+import android.os.Build
+import android.os.Handler
+import android.os.VibrationEffect
+import android.os.Vibrator
 import android.provider.Settings
 import android.view.*
 import android.view.inputmethod.EditorInfo
@@ -36,13 +37,17 @@ import android.widget.Button
 import android.widget.FrameLayout
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.drawable.DrawableCompat
+import androidx.lifecycle.*
 import com.squareup.moshi.Json
 import dev.patrickgold.florisboard.BuildConfig
 import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.clip.ClipboardInputManager
+import dev.patrickgold.florisboard.ime.clip.FlorisClipboardManager
+import dev.patrickgold.florisboard.ime.landscapeinput.LandscapeInputUiMode
 import dev.patrickgold.florisboard.ime.media.MediaInputManager
+import dev.patrickgold.florisboard.ime.onehanded.OneHandedMode
 import dev.patrickgold.florisboard.ime.popup.PopupLayerView
 import dev.patrickgold.florisboard.ime.text.TextInputManager
-import dev.patrickgold.florisboard.ime.landscapeinput.LandscapeInputUiMode
 import dev.patrickgold.florisboard.ime.text.gestures.SwipeAction
 import dev.patrickgold.florisboard.ime.text.key.KeyCode
 import dev.patrickgold.florisboard.ime.text.key.KeyData
@@ -54,6 +59,9 @@ import dev.patrickgold.florisboard.util.*
 import timber.log.Timber
 import java.lang.ref.WeakReference
 import java.util.concurrent.CopyOnWriteArrayList
+import java.util.concurrent.Executor
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
 
 /**
  * Variable which holds the current [FlorisBoard] instance. To get this instance from another
@@ -65,13 +73,16 @@ private var florisboardInstance: FlorisBoard? = null
  * Core class responsible to link together both the text and media input managers as well as
  * managing the one-handed UI.
  */
-class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedListener,
+class FlorisBoard : InputMethodService(), LifecycleOwner, FlorisClipboardManager.OnPrimaryClipChangedListener,
     ThemeManager.OnThemeUpdatedListener {
+
     lateinit var prefs: PrefHelper
         private set
 
     val context: Context
         get() = inputWindowView?.context ?: this
+    private val serviceLifecycleDispatcher: ServiceLifecycleDispatcher = ServiceLifecycleDispatcher(this)
+
     private var extractEditLayout: WeakReference<ViewGroup?> = WeakReference(null)
     var inputView: InputView? = null
         private set
@@ -81,12 +92,23 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
     private var eventListeners: CopyOnWriteArrayList<EventListener> = CopyOnWriteArrayList()
 
     private var audioManager: AudioManager? = null
-    private var imeManager:InputMethodManager? = null
-    var clipboardManager: ClipboardManager? = null
+    var imeManager:InputMethodManager? = null
+    var florisClipboardManager: FlorisClipboardManager? = null
     private val themeManager: ThemeManager = ThemeManager.default()
     private var vibrator: Vibrator? = null
     private val osHandler = Handler()
 
+    private var internalBatchNestingLevel: Int = 0
+    private val internalSelectionCache = object {
+        var selectionCatchCount: Int = 0
+        var oldSelStart: Int = -1
+        var oldSelEnd: Int = -1
+        var newSelStart: Int = -1
+        var newSelEnd: Int = -1
+        var candidatesStart: Int = -1
+        var candidatesEnd: Int = -1
+    }
+
     var activeEditorInstance: EditorInstance = EditorInstance.default()
 
     lateinit var subtypeManager: SubtypeManager
@@ -94,31 +116,42 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
     private var currentThemeIsNight: Boolean = false
     private var currentThemeResId: Int = 0
     private var isNumberRowVisible: Boolean = false
+    private var isWindowShown: Boolean = false
 
     val textInputManager: TextInputManager
     val mediaInputManager: MediaInputManager
+    val clipInputManager: ClipboardInputManager
+
+    var isClipboardContextMenuShown = false
 
     init {
         florisboardInstance = this
 
         textInputManager = TextInputManager.getInstance()
         mediaInputManager = MediaInputManager.getInstance()
+        clipInputManager = ClipboardInputManager.getInstance()
     }
 
+    lateinit var asyncExecutor: ExecutorService
+
     companion object {
         private const val IME_ID: String = "dev.patrickgold.florisboard/.ime.core.FlorisBoard"
+        private const val IME_ID_BETA: String = "dev.patrickgold.florisboard.beta/dev.patrickgold.florisboard.ime.core.FlorisBoard"
         private const val IME_ID_DEBUG: String = "dev.patrickgold.florisboard.debug/dev.patrickgold.florisboard.ime.core.FlorisBoard"
 
         fun checkIfImeIsEnabled(context: Context): Boolean {
             val activeImeIds = Settings.Secure.getString(
                 context.contentResolver,
                 Settings.Secure.ENABLED_INPUT_METHODS
-            )
+            ) ?: "(none)"
             Timber.i("List of active IMEs: $activeImeIds")
             return when {
                 BuildConfig.DEBUG -> {
                     activeImeIds.split(":").contains(IME_ID_DEBUG)
                 }
+                context.packageName.endsWith(".beta") -> {
+                    activeImeIds.split(":").contains(IME_ID_BETA)
+                }
                 else -> {
                     activeImeIds.split(":").contains(IME_ID)
                 }
@@ -129,12 +162,15 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
             val selectedImeId = Settings.Secure.getString(
                 context.contentResolver,
                 Settings.Secure.DEFAULT_INPUT_METHOD
-            )
+            ) ?: "(none)"
             Timber.i("Selected IME: $selectedImeId")
             return when {
                 BuildConfig.DEBUG -> {
                     selectedImeId == IME_ID_DEBUG
                 }
+                context.packageName.endsWith(".beta") -> {
+                    selectedImeId.split(":").contains(IME_ID_BETA)
+                }
                 else -> {
                     selectedImeId == IME_ID
                 }
@@ -159,6 +195,10 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         }
     }
 
+    override fun getLifecycle(): Lifecycle {
+        return serviceLifecycleDispatcher.lifecycle
+    }
+
     override fun onCreate() {
         /*if (BuildConfig.DEBUG) {
             StrictMode.setThreadPolicy(
@@ -179,12 +219,11 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
             )
         }*/
         Timber.i("onCreate()")
+        serviceLifecycleDispatcher.onServicePreSuperOnCreate()
 
-        imeManager = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
-        audioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager
-        clipboardManager = context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
-        clipboardManager?.addPrimaryClipChangedListener(this)
-        vibrator = context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+        imeManager = getSystemService(Context.INPUT_METHOD_SERVICE) as? InputMethodManager
+        audioManager = getSystemService(Context.AUDIO_SERVICE) as? AudioManager
+        vibrator = context.getSystemService(Context.VIBRATOR_SERVICE) as? Vibrator
         prefs = PrefHelper.getDefaultInstance(this)
         prefs.initDefaultPreferences()
         prefs.sync()
@@ -199,6 +238,11 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
 
         AppVersionUtils.updateVersionOnInstallAndLastUse(this, prefs)
 
+        asyncExecutor = Executors.newSingleThreadExecutor()
+        florisClipboardManager = FlorisClipboardManager.getInstance()
+        florisClipboardManager!!.initialize(context)
+        florisClipboardManager?.addPrimaryClipChangedListener(this)
+
         super.onCreate()
         eventListeners.toList().forEach { it?.onCreate() }
     }
@@ -209,7 +253,9 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
 
         baseContext.setTheme(currentThemeResId)
 
-        inputWindowView = layoutInflater.inflate(R.layout.florisboard, null) as InputWindowView
+        inputWindowView = layoutInflater.inflate(R.layout.florisboard, null) as? InputWindowView
+        inputWindowView?.isHapticFeedbackEnabled = true
+
         eventListeners.toList().forEach { it?.onCreateInputView() }
 
         return inputWindowView
@@ -244,6 +290,22 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         return eel
     }
 
+    override fun onDestroy() {
+        Timber.i("onDestroy()")
+
+        themeManager.unregisterOnThemeUpdatedListener(this)
+        florisClipboardManager!!.removePrimaryClipChangedListener(this)
+        florisClipboardManager!!.close()
+        osHandler.removeCallbacksAndMessages(null)
+        florisboardInstance = null
+
+        serviceLifecycleDispatcher.onServicePreSuperOnDestroy()
+
+        eventListeners.toList().forEach { it?.onDestroy() }
+        eventListeners.clear()
+        super.onDestroy()
+    }
+
     override fun onEvaluateFullscreenMode(): Boolean {
         return resources?.configuration?.let { config ->
             if (config.orientation != Configuration.ORIENTATION_LANDSCAPE) {
@@ -281,7 +343,6 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
             }
         }
         this.inputView = inputView
-        initializeOneHandedEnvironment()
         updateSoftInputWindowLayoutParameters()
         updateOneHandedPanelVisibility()
         themeManager.notifyCallbackReceivers()
@@ -290,24 +351,10 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         eventListeners.toList().forEach { it?.onRegisterInputView(inputView) }
     }
 
-    override fun onDestroy() {
-        Timber.i("onDestroy()")
-
-        themeManager.unregisterOnThemeUpdatedListener(this)
-        clipboardManager?.removePrimaryClipChangedListener(this)
-        osHandler.removeCallbacksAndMessages(null)
-        florisboardInstance = null
-
-        eventListeners.toList().forEach { it?.onDestroy() }
-        eventListeners.clear()
-        super.onDestroy()
-    }
-
     override fun onStartInput(attribute: EditorInfo?, restarting: Boolean) {
         Timber.i("onStartInput($attribute, $restarting)")
-
         super.onStartInput(attribute, restarting)
-        currentInputConnection?.requestCursorUpdates(InputConnection.CURSOR_UPDATE_IMMEDIATE)
+        currentInputConnection?.requestCursorUpdates(InputConnection.CURSOR_UPDATE_MONITOR)
     }
 
     override fun onStartInputView(info: EditorInfo?, restarting: Boolean) {
@@ -341,7 +388,13 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
     }
 
     override fun onWindowShown() {
-        Timber.i("onWindowShown()")
+        if (isWindowShown) {
+            Timber.i("Ignoring onWindowShown()")
+            return
+        } else {
+            Timber.i("onWindowShown()")
+        }
+        isWindowShown = true
 
         prefs.sync()
         val newIsNumberRowVisible = prefs.keyboard.numberRow
@@ -360,7 +413,13 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
     }
 
     override fun onWindowHidden() {
-        Timber.i("onWindowHidden()")
+        if (!isWindowShown) {
+            Timber.i("Ignoring onWindowHidden()")
+            return
+        } else {
+            Timber.i("onWindowHidden()")
+        }
+        isWindowShown = false
 
         super.onWindowHidden()
         eventListeners.toList().forEach { it?.onWindowHidden() }
@@ -375,23 +434,74 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         super.onConfigurationChanged(newConfig)
     }
 
+    /**
+     * Begins a FlorisBoard internal batch edit. This enables the application to continue sending selection updates
+     * (some apps need to to this else they absolutely refuse to give visual feedback on cursor movement etc.). The
+     * selection update is then caught if [internalBatchNestingLevel] is greater than 0, thus not delegating the
+     * update to the editor instance. This is needed because else the UI stutters when too many updates arrive in a
+     * row.
+     */
+    fun beginInternalBatchEdit() {
+        internalBatchNestingLevel++
+    }
+
+    /**
+     * Ends an internal batch edit, if [internalBatchNestingLevel] is <= 1 and calls [onUpdateSelection] with the
+     * corresponding reported selection values. This call is not caught and the editor instance and other classes are
+     * able to update the UI. Resets the internal selection cache and is ready for the next batch edit.
+     */
+    fun endInternalBatchEdit() {
+        internalBatchNestingLevel = (internalBatchNestingLevel - 1).coerceAtLeast(0)
+        if (internalBatchNestingLevel == 0) {
+            internalSelectionCache.apply {
+                if (selectionCatchCount > 0) {
+                    onUpdateSelection(
+                        oldSelStart, oldSelEnd,
+                        newSelStart, newSelEnd,
+                        candidatesStart, candidatesEnd
+                    )
+                    selectionCatchCount = 0
+                    oldSelStart = -1
+                    oldSelEnd = -1
+                    newSelStart = -1
+                    newSelEnd = -1
+                    candidatesStart = -1
+                    candidatesEnd = -1
+                }
+            }
+        }
+    }
+
     override fun onUpdateSelection(
         oldSelStart: Int, oldSelEnd: Int,
         newSelStart: Int, newSelEnd: Int,
         candidatesStart: Int, candidatesEnd: Int
     ) {
-        Timber.i("onUpdateSelection($oldSelStart, $oldSelEnd, $newSelStart, $newSelEnd, $candidatesStart, $candidatesEnd)")
-
         super.onUpdateSelection(
             oldSelStart, oldSelEnd,
             newSelStart, newSelEnd,
             candidatesStart, candidatesEnd
         )
-        activeEditorInstance.onUpdateSelection(
-            oldSelStart, oldSelEnd,
-            newSelStart, newSelEnd
-        )
-        eventListeners.toList().forEach { it?.onUpdateSelection() }
+
+        if (internalBatchNestingLevel == 0) {
+            Timber.i("onUpdateSelection($oldSelStart, $oldSelEnd, $newSelStart, $newSelEnd, $candidatesStart, $candidatesEnd)")
+            activeEditorInstance.onUpdateSelection(
+                oldSelStart, oldSelEnd,
+                newSelStart, newSelEnd,
+                candidatesStart, candidatesEnd
+            )
+            eventListeners.toList().forEach { it?.onUpdateSelection() }
+        } else {
+            Timber.i("onUpdateSelection($oldSelStart, $oldSelEnd, $newSelStart, $newSelEnd, $candidatesStart, $candidatesEnd): caught due to internal batch level of $internalBatchNestingLevel!")
+            if (internalSelectionCache.selectionCatchCount++ == 0) {
+                internalSelectionCache.oldSelStart = oldSelStart
+                internalSelectionCache.oldSelEnd = oldSelEnd
+            }
+            internalSelectionCache.newSelStart = newSelStart
+            internalSelectionCache.newSelEnd = newSelEnd
+            internalSelectionCache.candidatesStart = candidatesStart
+            internalSelectionCache.candidatesEnd = candidatesEnd
+        }
     }
 
     override fun onThemeUpdated(theme: Theme) {
@@ -433,14 +543,6 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
 
         // Update InputView theme
         inputView?.setBackgroundColor(theme.getAttr(Theme.Attr.KEYBOARD_BACKGROUND).toSolidColor().color)
-        inputView?.oneHandedCtrlPanelStart?.setBackgroundColor(theme.getAttr(Theme.Attr.ONE_HANDED_BACKGROUND).toSolidColor().color)
-        inputView?.oneHandedCtrlPanelEnd?.setBackgroundColor(theme.getAttr(Theme.Attr.ONE_HANDED_BACKGROUND).toSolidColor().color)
-        ColorStateList.valueOf(theme.getAttr(Theme.Attr.ONE_HANDED_FOREGROUND).toSolidColor().color).also {
-            inputView?.oneHandedCtrlMoveStart?.imageTintList = it
-            inputView?.oneHandedCtrlMoveEnd?.imageTintList = it
-            inputView?.oneHandedCtrlCloseStart?.imageTintList = it
-            inputView?.oneHandedCtrlCloseEnd?.imageTintList = it
-        }
         inputView?.invalidate()
 
         // Update ExtractTextView theme and attributes
@@ -478,6 +580,7 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         val inputView = this.inputView ?: return
         val inputWindowView = this.inputWindowView ?: return
         // TODO: Check also if the keyboard is currently suppressed by a hardware keyboard
+
         if (!isInputViewShown) {
             outInsets?.contentTopInsets = inputWindowView.height
             outInsets?.visibleTopInsets = inputWindowView.height
@@ -486,6 +589,11 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         val visibleTopY = inputWindowView.height - inputView.measuredHeight
         outInsets?.contentTopInsets = visibleTopY
         outInsets?.visibleTopInsets = visibleTopY
+
+        if (isClipboardContextMenuShown) {
+            outInsets?.touchableInsets = Insets.TOUCHABLE_INSETS_FRAME
+            outInsets?.touchableRegion?.setEmpty()
+        }
     }
 
     /**
@@ -515,7 +623,12 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         if (prefs.keyboard.vibrationEnabled) {
             var vibrationStrength = prefs.keyboard.vibrationStrength
             if (vibrationStrength == -1 && prefs.keyboard.vibrationEnabledSystem) {
-                vibrationStrength = 36
+                val hapticsPerformed =
+                    inputWindowView?.performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP)
+
+                if (hapticsPerformed == false) {
+                    vibrationStrength = 36
+                }
             }
             if (vibrationStrength > 0) {
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
@@ -575,7 +688,7 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         i.flags = Intent.FLAG_ACTIVITY_NEW_TASK or
                   Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED or
                   Intent.FLAG_ACTIVITY_CLEAR_TOP
-        startActivity(i)
+        applicationContext.startActivity(i)
     }
 
     /**
@@ -630,6 +743,7 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
     private fun onSubtypeChanged(newSubtype: Subtype) {
         textInputManager.onSubtypeChanged(newSubtype)
         mediaInputManager.onSubtypeChanged(newSubtype)
+        clipInputManager.onSubtypeChanged(newSubtype)
     }
 
     fun setActiveInput(type: Int) {
@@ -640,61 +754,35 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
             R.id.media_input -> {
                 inputView?.mainViewFlipper?.displayedChild = 1
             }
-        }
-    }
-
-    private fun initializeOneHandedEnvironment() {
-        { v:View -> onOneHandedPanelButtonClick(v) }.also {
-            inputView?.oneHandedCtrlMoveStart?.setOnClickListener(it)
-            inputView?.oneHandedCtrlMoveEnd?.setOnClickListener(it)
-            inputView?.oneHandedCtrlCloseStart?.setOnClickListener(it)
-            inputView?.oneHandedCtrlCloseEnd?.setOnClickListener(it)
-        }
-    }
-
-    private fun onOneHandedPanelButtonClick(v: View) {
-        when (v.id) {
-            R.id.one_handed_ctrl_move_start -> {
-                prefs.keyboard.oneHandedMode = "start"
-            }
-            R.id.one_handed_ctrl_move_end -> {
-                prefs.keyboard.oneHandedMode = "end"
-            }
-            R.id.one_handed_ctrl_close_start,
-            R.id.one_handed_ctrl_close_end -> {
-                prefs.keyboard.oneHandedMode = "off"
+            R.id.clip_input -> {
+                inputView?.mainViewFlipper?.displayedChild = 2
             }
         }
-        updateOneHandedPanelVisibility()
     }
 
     fun toggleOneHandedMode(isRight: Boolean) {
-        when (prefs.keyboard.oneHandedMode) {
-            "off" -> {
-                prefs.keyboard.oneHandedMode = if (isRight) { "end" } else { "start" }
-            }
-            else -> {
-                prefs.keyboard.oneHandedMode = "off"
-            }
+        prefs.keyboard.oneHandedMode = when (prefs.keyboard.oneHandedMode) {
+            OneHandedMode.OFF -> if (isRight) { OneHandedMode.END } else { OneHandedMode.START }
+            else -> OneHandedMode.OFF
         }
         updateOneHandedPanelVisibility()
     }
 
-    private fun updateOneHandedPanelVisibility() {
+    fun updateOneHandedPanelVisibility() {
         if (resources.configuration.orientation != Configuration.ORIENTATION_PORTRAIT) {
             inputView?.oneHandedCtrlPanelStart?.visibility = View.GONE
             inputView?.oneHandedCtrlPanelEnd?.visibility = View.GONE
         } else {
             when (prefs.keyboard.oneHandedMode) {
-                "off" -> {
+                OneHandedMode.OFF -> {
                     inputView?.oneHandedCtrlPanelStart?.visibility = View.GONE
                     inputView?.oneHandedCtrlPanelEnd?.visibility = View.GONE
                 }
-                "start" -> {
+                OneHandedMode.START -> {
                     inputView?.oneHandedCtrlPanelStart?.visibility = View.GONE
                     inputView?.oneHandedCtrlPanelEnd?.visibility = View.VISIBLE
                 }
-                "end" -> {
+                OneHandedMode.END -> {
                     inputView?.oneHandedCtrlPanelStart?.visibility = View.VISIBLE
                     inputView?.oneHandedCtrlPanelEnd?.visibility = View.GONE
                 }
@@ -775,14 +863,21 @@ class FlorisBoard : InputMethodService(), ClipboardManager.OnPrimaryClipChangedL
         val defaultSubtypesLanguageNames: List<String>
 
         init {
-            val tmpCodes = mutableListOf<String>()
-            val tmpNames = mutableListOf<String>()
+            val tmpList = mutableListOf<Pair<String, String>>()
             for (defaultSubtype in defaultSubtypes) {
-                tmpCodes.add(defaultSubtype.locale.toString())
-                tmpNames.add(defaultSubtype.locale.displayName)
+                tmpList.add(Pair(defaultSubtype.locale.toString(), defaultSubtype.locale.displayName))
             }
-            defaultSubtypesLanguageCodes = tmpCodes.toList()
-            defaultSubtypesLanguageNames = tmpNames.toList()
+            // Sort language list alphabetically by the display name of a language
+            tmpList.sortBy { it.second }
+            // Move selected English variants to the top of the list
+            for (languageCode in listOf("en_CA", "en_AU", "en_UK", "en_US")) {
+                val index: Int = tmpList.indexOfFirst { it.first == languageCode }
+                if (index > 0) {
+                    tmpList.add(0, tmpList.removeAt(index))
+                }
+            }
+            defaultSubtypesLanguageCodes = tmpList.map { it.first }.toList()
+            defaultSubtypesLanguageNames = tmpList.map { it.second }.toList()
         }
     }
 }

app/src/main/java/dev/patrickgold/florisboard/ime/core/FlorisViewFlipper.kt

@@ -19,7 +19,6 @@ package dev.patrickgold.florisboard.ime.core
 import android.content.Context
 import android.util.AttributeSet
 import android.widget.ViewFlipper
-import java.lang.IllegalArgumentException
 
 /**
  * Custom ViewFlipper class used to prevent an unnecessary exception to be thrown when it is

app/src/main/java/dev/patrickgold/florisboard/ime/core/InputEventDispatcher.kt

@@ -0,0 +1,373 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.core
+
+import android.os.SystemClock
+import dev.patrickgold.florisboard.BuildConfig
+import dev.patrickgold.florisboard.ime.text.key.KeyCode
+import dev.patrickgold.florisboard.ime.text.key.KeyData
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import timber.log.Timber
+
+/**
+ * The main logic point of processing input events and delegating them to the registered event receivers. Currently,
+ * only [InputKeyEvent]s are supported, but in the future this class is thought to be the single point where input
+ * events can be dispatched.
+ */
+class InputEventDispatcher private constructor(
+    parentScope: CoroutineScope,
+    channelCapacity: Int,
+    private val mainDispatcher: CoroutineDispatcher,
+    private val defaultDispatcher: CoroutineDispatcher,
+    private val repeatableKeyCodes: IntArray
+) : InputKeyEventSender {
+    private val channel: Channel<InputKeyEvent> = Channel(channelCapacity)
+    private val scope: CoroutineScope = CoroutineScope(parentScope.coroutineContext)
+    private val pressedKeys: HashMap<Int, PressedKeyInfo> = hashMapOf()
+    var lastKeyEventDown: InputKeyEvent? = null
+        private set
+    var lastKeyEventUp: InputKeyEvent? = null
+        private set
+
+    /**
+     * The input key event register. If null, the dispatcher will still process input, but won't dispatch them to an
+     * event receiver.
+     */
+    var keyEventReceiver: InputKeyEventReceiver? = null
+
+    companion object {
+        /**
+         * The default input event channel capacity to be used in [new].
+         */
+        private const val DEFAULT_CHANNEL_CAPACITY: Int = 32
+
+        /**
+         * Creates a new [InputEventDispatcher] instance from given arguments and returns it.
+         *
+         * @param parentScope The parent coroutine scope which this dispatcher will attach its own scope to.
+         * @param channelCapacity The capacity of this input channel, defaults to [DEFAULT_CHANNEL_CAPACITY].
+         * @param mainDispatcher The main dispatcher used to switch the context to call the receiver callbacks.
+         *  Defaults to [Dispatchers.Main].
+         * @param defaultDispatcher The default dispatcher used to switch the context to call the receiver callbacks.
+         *  Defaults to [Dispatchers.Default].
+         * @param repeatableKeyCodes An int array of all key codes which are repeatable while being pressed down.
+         *
+         * @return A new [InputEventDispatcher] instance initialized with given arguments.
+         */
+        fun new(
+            parentScope: CoroutineScope,
+            channelCapacity: Int = DEFAULT_CHANNEL_CAPACITY,
+            mainDispatcher: CoroutineDispatcher = Dispatchers.Main,
+            defaultDispatcher: CoroutineDispatcher = Dispatchers.Default,
+            repeatableKeyCodes: IntArray = intArrayOf()
+        ): InputEventDispatcher = InputEventDispatcher(
+            parentScope, channelCapacity, mainDispatcher, defaultDispatcher, repeatableKeyCodes.clone()
+        )
+    }
+
+    init {
+        scope.launch(defaultDispatcher) {
+            for (ev in channel) {
+                if (!isActive) break
+                val startTime = System.nanoTime()
+                if (BuildConfig.DEBUG) {
+                    Timber.d(ev.toString())
+                }
+                when (ev.action) {
+                    InputKeyEvent.Action.DOWN -> {
+                        if (pressedKeys.containsKey(ev.data.code)) continue
+                        pressedKeys[ev.data.code] = PressedKeyInfo(
+                            eventTimeDown = ev.eventTime,
+                            repeatKeyPressJob = if (!repeatableKeyCodes.contains(ev.data.code)) { null } else {
+                                scope.launch(defaultDispatcher) {
+                                    delay(600)
+                                    while (isActive) {
+                                        channel.send(InputKeyEvent.repeat(ev.data))
+                                        delay(50)
+                                    }
+                                }
+                            }
+                        )
+                        withContext(mainDispatcher) {
+                            keyEventReceiver?.onInputKeyDown(ev)
+                        }
+                        if (ev.data.code != KeyCode.INTERNAL_BATCH_EDIT) {
+                            lastKeyEventDown = ev
+                        }
+                    }
+                    InputKeyEvent.Action.DOWN_UP -> {
+                        pressedKeys.remove(ev.data.code)?.repeatKeyPressJob?.cancel()
+                        withContext(mainDispatcher) {
+                            keyEventReceiver?.onInputKeyDown(ev)
+                            keyEventReceiver?.onInputKeyUp(ev)
+                        }
+                        if (ev.data.code != KeyCode.INTERNAL_BATCH_EDIT) {
+                            lastKeyEventDown = ev
+                            lastKeyEventUp = ev
+                        }
+                    }
+                    InputKeyEvent.Action.UP -> {
+                        pressedKeys.remove(ev.data.code)?.repeatKeyPressJob?.cancel()
+                        withContext(mainDispatcher) {
+                            keyEventReceiver?.onInputKeyUp(ev)
+                        }
+                        if (ev.data.code != KeyCode.INTERNAL_BATCH_EDIT) {
+                            lastKeyEventUp = ev
+                        }
+                    }
+                    InputKeyEvent.Action.REPEAT -> {
+                        if (pressedKeys.containsKey(ev.data.code)) {
+                            withContext(mainDispatcher) {
+                                keyEventReceiver?.onInputKeyRepeat(ev)
+                            }
+                        }
+                    }
+                    InputKeyEvent.Action.CANCEL -> {
+                        pressedKeys.remove(ev.data.code)?.repeatKeyPressJob?.cancel()
+                        withContext(mainDispatcher) {
+                            keyEventReceiver?.onInputKeyCancel(ev)
+                        }
+                    }
+                }
+                if (BuildConfig.DEBUG) {
+                    Timber.d("Time elapsed: ${(System.nanoTime() - startTime) / 1_000_000}")
+                }
+            }
+            val pressedKeysIterator = pressedKeys.iterator()
+            while (pressedKeysIterator.hasNext()) {
+                pressedKeysIterator.next().value.repeatKeyPressJob?.cancel()
+                pressedKeysIterator.remove()
+            }
+        }
+    }
+
+    override fun send(ev: InputKeyEvent) {
+        scope.launch(mainDispatcher) {
+            channel.send(ev)
+        }
+    }
+
+    /**
+     * Checks if there's currently a key down with given [code].
+     *
+     * @param code The key code to check for.
+     *
+     * @return True if the given [code] is currently down, false otherwise.
+     */
+    fun isPressed(code: Int): Boolean {
+        return pressedKeys.containsKey(code)
+    }
+
+    /**
+     * Closes this dispatcher and cancels the local coroutine scope.
+     */
+    fun close() {
+        keyEventReceiver = null
+        scope.cancel()
+    }
+
+    data class PressedKeyInfo(
+        val eventTimeDown: Long,
+        val repeatKeyPressJob: Job?
+    )
+}
+
+/**
+ * Data class representing a single input key event.
+ *
+ * @property eventTime The exact event time when this event occurred, measured in milliseconds since a static point in
+ *  the past. The exact point is irrelevant, but while this input dispatcher is active, the point must not change in
+ *  order for difference time calculation to succeed.
+ * @property action The action of this event.
+ * @property data The data of this event.
+ * @property count The count how often this event occurred. Is only respected by other methods if the [action] of this
+ *  event is [Action.DOWN_UP] or [Action.REPEAT], else always 1 is assumed.
+ */
+data class InputKeyEvent(
+    val eventTime: Long,
+    val action: Action,
+    val data: KeyData,
+    val count: Int
+) {
+    companion object {
+        /**
+         * Creates a new input key event with given [keyData] and sets the action to [Action.DOWN].
+         *
+         * @param keyData The key data of the input key event event to create.
+         *
+         * @return The created input key event.
+         */
+        fun down(keyData: KeyData): InputKeyEvent {
+            return InputKeyEvent(
+                eventTime = SystemClock.uptimeMillis(),
+                action = Action.DOWN,
+                data = keyData,
+                count = 1
+            )
+        }
+
+        /**
+         * Creates a new input key event with given [keyData] and sets the action to [Action.DOWN_UP].
+         *
+         * @param keyData The key data of the input key event event to create.
+         * @param count How often this event occurred. Must be grater or equal to 1, defaults to 1.
+         *
+         * @return The created input key event.
+         */
+        fun downUp(keyData: KeyData, count: Int = 1): InputKeyEvent {
+            return InputKeyEvent(
+                eventTime = SystemClock.uptimeMillis(),
+                action = Action.DOWN_UP,
+                data = keyData,
+                count = count
+            )
+        }
+
+        /**
+         * Creates a new input key event with given [keyData] and sets the action to [Action.UP].
+         *
+         * @param keyData The key data of the input key event event to create.
+         *
+         * @return The created input key event.
+         */
+        fun up(keyData: KeyData): InputKeyEvent {
+            return InputKeyEvent(
+                eventTime = SystemClock.uptimeMillis(),
+                action = Action.UP,
+                data = keyData,
+                count = 1
+            )
+        }
+
+        /**
+         * Creates a new input key event with given [keyData] and sets the action to [Action.REPEAT].
+         *
+         * @param keyData The key data of the input key event event to create.
+         * @param count How often this event occurred. Must be grater or equal to 1, defaults to 1.
+         *
+         * @return The created input key event.
+         */
+        fun repeat(keyData: KeyData, count: Int = 1): InputKeyEvent {
+            return InputKeyEvent(
+                eventTime = SystemClock.uptimeMillis(),
+                action = Action.REPEAT,
+                data = keyData,
+                count = count
+            )
+        }
+
+        /**
+         * Creates a new input key event with given [keyData] and sets the action to [Action.CANCEL].
+         *
+         * @param keyData The key data of the input key event event to create.
+         *
+         * @return The created input key event.
+         */
+        fun cancel(keyData: KeyData): InputKeyEvent {
+            return InputKeyEvent(
+                eventTime = SystemClock.uptimeMillis(),
+                action = Action.CANCEL,
+                data = keyData,
+                count = 1
+            )
+        }
+    }
+
+    /**
+     * Checks if the [other] input key event is a consecutive event while respecting [maxEventTimeDiff].
+     *
+     * @param other The other input key event to compare with this one.
+     * @param maxEventTimeDiff The maximum event time diff between this event and [other], in milliseconds.
+     *
+     * @return True if this event is a consecutive event of [other], false otherwise.
+     */
+    fun isConsecutiveEventOf(other: InputKeyEvent?, maxEventTimeDiff: Long): Boolean {
+        return other != null && data.code == other.data.code && eventTime - other.eventTime <= maxEventTimeDiff
+    }
+
+    /**
+     * Returns a string representation of this input key event.
+     */
+    override fun toString(): String {
+        return "FlorisKeyEvent { eventTime=${eventTime}ms, action=$action, data=$data, count=$count }"
+    }
+
+    /**
+     * The action of an input key event.
+     */
+    enum class Action {
+        DOWN,
+        DOWN_UP,
+        UP,
+        REPEAT,
+        CANCEL,
+    }
+}
+
+/**
+ * Interface which represents an input key event sender.
+ */
+interface InputKeyEventSender {
+    /**
+     * Sends given input key event [ev] to the underlying input channel, awaiting to be processed.
+     *
+     * @param ev The input key event to send.
+     */
+    fun send(ev: InputKeyEvent)
+}
+
+/**
+ * Interface which represents an input key event receiver.
+ */
+interface InputKeyEventReceiver {
+    /**
+     * Event method which gets called when a key went down.
+     *
+     * @param ev The associated input key event.
+     */
+    fun onInputKeyDown(ev: InputKeyEvent)
+
+    /**
+     * Event method which gets called when a key went up.
+     *
+     * @param ev The associated input key event.
+     */
+    fun onInputKeyUp(ev: InputKeyEvent)
+
+    /**
+     * Event method which gets called when a key is called repeatedly while being pressed down.
+     *
+     * @param ev The associated input key event.
+     */
+    fun onInputKeyRepeat(ev: InputKeyEvent)
+
+    /**
+     * Event method which gets called when a key press is cancelled.
+     *
+     * @param ev The associated input key event.
+     */
+    fun onInputKeyCancel(ev: InputKeyEvent)
+}

app/src/main/java/dev/patrickgold/florisboard/ime/core/InputView.kt

@@ -20,10 +20,12 @@ import android.content.Context
 import android.content.res.Configuration
 import android.util.AttributeSet
 import android.util.DisplayMetrics
+import android.view.ViewGroup
 import android.widget.ImageButton
 import android.widget.LinearLayout
 import android.widget.ViewFlipper
 import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.onehanded.OneHandedMode
 import dev.patrickgold.florisboard.ime.text.key.KeyVariation
 import dev.patrickgold.florisboard.ime.text.keyboard.KeyboardMode
 import dev.patrickgold.florisboard.util.ViewLayoutUtils
@@ -48,17 +50,9 @@ class InputView : LinearLayout {
 
     var mainViewFlipper: ViewFlipper? = null
         private set
-    var oneHandedCtrlPanelStart: LinearLayout? = null
+    var oneHandedCtrlPanelStart: ViewGroup? = null
         private set
-    var oneHandedCtrlPanelEnd: LinearLayout? = null
-        private set
-    var oneHandedCtrlMoveStart: ImageButton? = null
-        private set
-    var oneHandedCtrlMoveEnd: ImageButton? = null
-        private set
-    var oneHandedCtrlCloseStart: ImageButton? = null
-        private set
-    var oneHandedCtrlCloseEnd: ImageButton? = null
+    var oneHandedCtrlPanelEnd: ViewGroup? = null
         private set
 
     constructor(context: Context) : this(context, null)
@@ -77,10 +71,6 @@ class InputView : LinearLayout {
         mainViewFlipper = findViewById(R.id.main_view_flipper)
         oneHandedCtrlPanelStart = findViewById(R.id.one_handed_ctrl_panel_start)
         oneHandedCtrlPanelEnd = findViewById(R.id.one_handed_ctrl_panel_end)
-        oneHandedCtrlMoveStart = findViewById(R.id.one_handed_ctrl_move_start)
-        oneHandedCtrlMoveEnd = findViewById(R.id.one_handed_ctrl_move_end)
-        oneHandedCtrlCloseStart = findViewById(R.id.one_handed_ctrl_close_start)
-        oneHandedCtrlCloseEnd = findViewById(R.id.one_handed_ctrl_close_end)
 
         florisboard.registerInputView(this)
     }
@@ -88,8 +78,8 @@ class InputView : LinearLayout {
     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
         val heightFactor = when (resources.configuration.orientation) {
             Configuration.ORIENTATION_LANDSCAPE -> 1.0f
-            else -> if (prefs.keyboard.oneHandedMode != "off") {
-                0.9f
+            else -> if (prefs.keyboard.oneHandedMode != OneHandedMode.OFF) {
+                prefs.keyboard.oneHandedModeScaleFactor / 100.0f
             } else {
                 1.0f
             }
@@ -171,5 +161,4 @@ class InputView : LinearLayout {
             resources.getDimension(R.dimen.inputView_baseHeight)
         )
     }
-
 }

app/src/main/java/dev/patrickgold/florisboard/ime/core/InputWindowView.kt

@@ -18,12 +18,7 @@ package dev.patrickgold.florisboard.ime.core
 
 import android.content.Context
 import android.util.AttributeSet
-import android.util.Log
 import android.widget.FrameLayout
-import android.widget.LinearLayout
-import android.widget.ViewFlipper
-import dev.patrickgold.florisboard.BuildConfig
-import dev.patrickgold.florisboard.R
 
 /**
  * Root view of the keyboard.

app/src/main/java/dev/patrickgold/florisboard/ime/core/PrefHelper.kt

@@ -22,6 +22,7 @@ import android.provider.Settings
 import androidx.preference.PreferenceManager
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.landscapeinput.LandscapeInputUiMode
+import dev.patrickgold.florisboard.ime.onehanded.OneHandedMode
 import dev.patrickgold.florisboard.ime.text.gestures.DistanceThreshold
 import dev.patrickgold.florisboard.ime.text.gestures.SwipeAction
 import dev.patrickgold.florisboard.ime.text.gestures.VelocityThreshold
@@ -30,7 +31,6 @@ import dev.patrickgold.florisboard.ime.text.key.UtilityKeyAction
 import dev.patrickgold.florisboard.ime.theme.ThemeMode
 import dev.patrickgold.florisboard.util.TimeUtil
 import dev.patrickgold.florisboard.util.VersionName
-import kotlin.collections.HashMap
 
 /**
  * Helper class for an organized access to the shared preferences.
@@ -53,6 +53,7 @@ class PrefHelper(
     val smartbar = Smartbar(this)
     val suggestion = Suggestion(this)
     val theme = Theme(this)
+    val clipboard = Clipboard(this)
 
     /**
      * Checks the cache if an entry for [key] exists, else calls [getPrefInternal] to retrieve the
@@ -317,10 +318,13 @@ class PrefHelper(
             const val HEIGHT_FACTOR_CUSTOM =            "keyboard__height_factor_custom"
             const val HINTED_NUMBER_ROW_MODE =          "keyboard__hinted_number_row_mode"
             const val HINTED_SYMBOLS_MODE =             "keyboard__hinted_symbols_mode"
+            const val KEY_SPACING_HORIZONTAL =          "keyboard__key_spacing_horizontal"
+            const val KEY_SPACING_VERTICAL =            "keyboard__key_spacing_vertical"
             const val LANDSCAPE_INPUT_UI_MODE =         "keyboard__landscape_input_ui_mode"
             const val LONG_PRESS_DELAY =                "keyboard__long_press_delay"
             const val NUMBER_ROW =                      "keyboard__number_row"
             const val ONE_HANDED_MODE =                 "keyboard__one_handed_mode"
+            const val ONE_HANDED_MODE_SCALE_FACTOR =    "keyboard__one_handed_mode_scale_factor"
             const val POPUP_ENABLED =                   "keyboard__popup_enabled"
             const val SOUND_ENABLED =                   "keyboard__sound_enabled"
             const val SOUND_VOLUME =                    "keyboard__sound_volume"
@@ -354,6 +358,12 @@ class PrefHelper(
         var hintedSymbolsMode: KeyHintMode
             get() =  KeyHintMode.fromString(prefHelper.getPref(HINTED_SYMBOLS_MODE, KeyHintMode.ENABLED_ACCENT_PRIORITY.toString()))
             set(v) = prefHelper.setPref(HINTED_SYMBOLS_MODE, v)
+        var keySpacingHorizontal: Float = 2f
+            get() = prefHelper.getPref(KEY_SPACING_HORIZONTAL, 4) / 2f
+            private set
+        var keySpacingVertical: Float = 5f
+            get() = prefHelper.getPref(KEY_SPACING_VERTICAL, 10) / 2f
+            private set
         var landscapeInputUiMode: LandscapeInputUiMode
             get() =  LandscapeInputUiMode.fromString(prefHelper.getPref(LANDSCAPE_INPUT_UI_MODE, LandscapeInputUiMode.DYNAMICALLY_SHOW.toString()))
             set(v) = prefHelper.setPref(LANDSCAPE_INPUT_UI_MODE, v)
@@ -364,8 +374,11 @@ class PrefHelper(
             get() =  prefHelper.getPref(NUMBER_ROW, false)
             set(v) = prefHelper.setPref(NUMBER_ROW, v)
         var oneHandedMode: String
-            get() = prefHelper.getPref(ONE_HANDED_MODE, "off")
+            get() = prefHelper.getPref(ONE_HANDED_MODE, OneHandedMode.OFF)
             set(value) = prefHelper.setPref(ONE_HANDED_MODE, value)
+        var oneHandedModeScaleFactor: Int
+            get() =  prefHelper.getPref(ONE_HANDED_MODE_SCALE_FACTOR, 87)
+            set(v) = prefHelper.setPref(ONE_HANDED_MODE_SCALE_FACTOR, v)
         var popupEnabled: Boolean = false
             get() = prefHelper.getPref(POPUP_ENABLED, true)
             private set
@@ -426,11 +439,15 @@ class PrefHelper(
      */
     class Suggestion(private val prefHelper: PrefHelper) {
         companion object {
+            const val BLOCK_POSSIBLY_OFFENSIVE =    "suggestion__block_possibly_offensive"
             const val ENABLED =                     "suggestion__enabled"
             const val SUGGEST_CLIPBOARD_CONTENT =   "suggestion__suggest_clipboard_content"
             const val USE_PREV_WORDS =              "suggestion__use_prev_words"
         }
 
+        var blockPossiblyOffensive: Boolean
+            get() =  prefHelper.getPref(BLOCK_POSSIBLY_OFFENSIVE, true)
+            set(v) = prefHelper.setPref(BLOCK_POSSIBLY_OFFENSIVE, v)
         var enabled: Boolean
             get() =  prefHelper.getPref(ENABLED, true)
             set(v) = prefHelper.setPref(ENABLED, v)
@@ -478,4 +495,52 @@ class PrefHelper(
             get() =  prefHelper.getPref(SUNSET_TIME, TimeUtil.encode(18, 0))
             set(v) = prefHelper.setPref(SUNSET_TIME, v)
     }
+
+    /**
+     * Wrapper class for clipboard preferences
+     */
+    class Clipboard(private val prefHelper: PrefHelper) {
+        companion object {
+            const val ENABLE_INTERNAL    = "clipboard__enable_internal"
+            const val SYNC_TO_SYSTEM     = "clipboard__sync_to_system"
+            const val SYNC_TO_FLORIS     = "clipboard__sync_to_floris"
+            const val ENABLE_HISTORY     = "clipboard__enable_history"
+            const val CLEAN_UP_OLD       = "clipboard__clean_up_old"
+            const val LIMIT_HISTORY_SIZE = "clipboard__limit_history_size"
+            const val CLEAN_UP_AFTER     = "clipboard__clean_up_after"
+            const val MAX_HISTORY_SIZE   = "clipboard__max_history_size"
+        }
+
+        var enableInternal: Boolean
+            get() =  prefHelper.getPref(ENABLE_INTERNAL, false)
+            set(v) = prefHelper.setPref(ENABLE_INTERNAL, v)
+
+        var syncToSystem: Boolean
+            get() =  prefHelper.getPref(SYNC_TO_SYSTEM, false)
+            set(v) = prefHelper.setPref(SYNC_TO_SYSTEM, v)
+
+        var syncToFloris: Boolean
+            get() =  prefHelper.getPref(SYNC_TO_FLORIS, true)
+            set(v) = prefHelper.setPref(SYNC_TO_FLORIS, v)
+
+        var enableHistory: Boolean
+            get()  = prefHelper.getPref(ENABLE_HISTORY, false)
+            set(v) = prefHelper.setPref(ENABLE_HISTORY, v)
+
+        var cleanUpOld: Boolean
+            get() =  prefHelper.getPref(CLEAN_UP_OLD, false)
+            set(v) = prefHelper.setPref(CLEAN_UP_OLD, v)
+
+        var limitHistorySize: Boolean
+            get() =  prefHelper.getPref(LIMIT_HISTORY_SIZE, true)
+            set(v) = prefHelper.setPref(LIMIT_HISTORY_SIZE, v)
+
+        var cleanUpAfter: Int
+            get() =  prefHelper.getPref(CLEAN_UP_AFTER, 20)
+            set(v) = prefHelper.setPref(CLEAN_UP_AFTER, v)
+
+        var maxHistorySize: Int
+            get() =  prefHelper.getPref(MAX_HISTORY_SIZE, 20)
+            set(v) = prefHelper.setPref(MAX_HISTORY_SIZE, v)
+    }
 }

app/src/main/java/dev/patrickgold/florisboard/ime/core/SubtypeManager.kt

@@ -20,7 +20,10 @@ import android.content.Context
 import com.squareup.moshi.Moshi
 import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
 import dev.patrickgold.florisboard.util.LocaleUtils
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.MainScope
+import kotlinx.coroutines.launch
 import java.util.*
 
 /**

app/src/main/java/dev/patrickgold/florisboard/ime/dictionary/Dictionary.kt

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.dictionary
+
+import dev.patrickgold.florisboard.ime.extension.Asset
+import dev.patrickgold.florisboard.ime.nlp.LanguageModel
+import dev.patrickgold.florisboard.ime.nlp.MutableLanguageModel
+import dev.patrickgold.florisboard.ime.nlp.Token
+import dev.patrickgold.florisboard.ime.nlp.WeightedToken
+
+/**
+ * Standardized dictionary interface for interacting with dictionaries.
+ */
+interface Dictionary<T : Any, F : Comparable<F>> : Asset {
+    val languageModel: LanguageModel<T, F>
+
+    /**
+     * Gets token predictions based on the given [precedingTokens] and the [currentToken]. The
+     * length of the returned list is limited to [maxSuggestionCount]. Note that the returned list
+     * may at any time give back less items than [maxSuggestionCount] indicates.
+     */
+    fun getTokenPredictions(
+        precedingTokens: List<Token<T>>,
+        currentToken: Token<T>?,
+        maxSuggestionCount: Int,
+        allowPossiblyOffensive: Boolean
+    ): List<WeightedToken<T, F>>
+
+    fun getDate(): Long
+
+    fun getVersion(): Int
+}
+
+interface MutableDictionary<T : Any, F : Comparable<F>> : Dictionary<T, F> {
+    override val languageModel: MutableLanguageModel<T, F>
+
+    fun trainTokenPredictions(
+        precedingTokens: List<Token<T>>,
+        lastToken: Token<T>
+    )
+
+    fun setDate(date: Int)
+
+    fun setVersion(version: Int)
+}

app/src/main/java/dev/patrickgold/florisboard/ime/dictionary/DictionaryManager.kt

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.dictionary
+
+import android.content.Context
+import dev.patrickgold.florisboard.ime.extension.AssetRef
+import timber.log.Timber
+
+/**
+ * TODO: document
+ */
+class DictionaryManager private constructor(private val applicationContext: Context) {
+    private val dictionaryCache: MutableMap<String, Dictionary<String, Int>> = mutableMapOf()
+
+    companion object {
+        private var defaultInstance: DictionaryManager? = null
+
+        fun init(applicationContext: Context): DictionaryManager {
+            val instance = DictionaryManager(applicationContext)
+            defaultInstance = instance
+            return instance
+        }
+
+        fun default(): DictionaryManager {
+            val instance = defaultInstance
+            if (instance != null) {
+                return instance
+            } else {
+                throw UninitializedPropertyAccessException(
+                    "${DictionaryManager::class.simpleName} has not been initialized previously. Make sure to call init(applicationContext) before using default()."
+                )
+            }
+        }
+    }
+
+    fun loadDictionary(ref: AssetRef): Result<Dictionary<String, Int>> {
+        dictionaryCache[ref.toString()]?.let {
+            return Result.success(it)
+        }
+        if (ref.path.endsWith(".flict")) {
+            // Assume this is a Flictionary
+            Flictionary.load(applicationContext, ref).onSuccess { flict ->
+                dictionaryCache[ref.toString()] = flict
+                return Result.success(flict)
+            }.onFailure { err ->
+                Timber.i(err)
+                return Result.failure(err)
+            }
+        } else {
+            return Result.failure(Exception("Unable to determine supported type for given AssetRef!"))
+        }
+        return Result.failure(Exception("If this message is ever thrown, something is completely broken..."))
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/dictionary/Flictionary.kt

@@ -0,0 +1,430 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.dictionary
+
+import android.content.Context
+import dev.patrickgold.florisboard.ime.extension.AssetRef
+import dev.patrickgold.florisboard.ime.extension.AssetSource
+import dev.patrickgold.florisboard.ime.nlp.*
+import java.io.InputStream
+import java.util.*
+import kotlin.jvm.Throws
+
+/**
+ * Class Flictionary which takes care of loading the binary asset as well as providing words for
+ * queries.
+ *
+ * This class accepts binary dictionary files of the type "flict" as defined in here:
+ * https://github.com/florisboard/dictionary-tools/blob/main/flictionary.md
+ */
+class Flictionary private constructor(
+    override val name: String,
+    override val label: String,
+    override val authors: List<String>,
+    private val date: Long,
+    private val version: Int,
+    private val headerStr: String,
+    override val languageModel: LanguageModel<String, Int>
+) : Dictionary<String, Int> {
+    companion object {
+        private const val VERSION_0 =                           0x0
+
+        private const val MASK_BEGIN_PTREE_NODE =               0x80
+        private const val CMDB_BEGIN_PTREE_NODE =               0x00
+        private const val ATTR_PTREE_NODE_ORDER =               0x70
+        private const val ATTR_PTREE_NODE_TYPE =                0x0C
+        private const val ATTR_PTREE_NODE_TYPE_CHAR =           0
+        private const val ATTR_PTREE_NODE_TYPE_WORD_FILLER =    1
+        private const val ATTR_PTREE_NODE_TYPE_WORD =           2
+        private const val ATTR_PTREE_NODE_TYPE_SHORTCUT =       3
+        private const val ATTR_PTREE_NODE_SIZE =                0x03
+
+        private const val MASK_END =                            0xC0
+        private const val CMDB_END =                            0x80
+        private const val ATTR_END_COUNT =                      0x3F
+
+        private const val MASK_BEGIN_HEADER =                   0xE0
+        private const val CMDB_BEGIN_HEADER =                   0xC0
+        private const val ATTR_HEADER_VERSION =                 0x1F
+
+        private const val MASK_DEFINE_SHORTCUT =                0xF0
+        private const val CMDB_DEFINE_SHORTCUT =                0xE0
+
+        /**
+         * Loads a Flictionary binary asset from given [assetRef] and returns a result containing
+         * either the parsed dictionary or an exception giving information about the error which
+         * occurred.
+         */
+        fun load(context: Context, assetRef: AssetRef): Result<Flictionary> {
+            val buffer = ByteArray(5000) { 0 }
+            val inputStream: InputStream
+            if (assetRef.source == AssetSource.Assets) {
+                inputStream = context.assets.open(assetRef.path)
+            } else {
+                return Result.failure(Exception("Only AssetSource.Assets is currently supported!"))
+            }
+
+            var headerStr: String? = null
+            var date: Long = 0
+            var version = 0
+            val ngramTree = NgramTree()
+
+            var pos = 0
+            val ngramOrderStack = mutableListOf<Int>()
+            val ngramTreeStack = mutableListOf<NgramNode>()
+
+            while (true) {
+                if (inputStream.readNext(buffer, 0, 1) <= 0) {
+                    break
+                }
+                val cmd = buffer[0].toInt() and 0xFF
+                when {
+                    (cmd and MASK_BEGIN_PTREE_NODE) == CMDB_BEGIN_PTREE_NODE -> {
+                        if (pos == 0) {
+                            inputStream.close()
+                            return Result.failure(
+                                ParseException(
+                                    errorType = ParseException.ErrorType.UNEXPECTED_CMD_BEGIN_PTREE_NODE,
+                                    address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                )
+                            )
+                        }
+                        val order = ((cmd and ATTR_PTREE_NODE_ORDER) shr 4) + 1
+                        val type = ((cmd and ATTR_PTREE_NODE_TYPE) shr 2)
+                        val size = (cmd and ATTR_PTREE_NODE_SIZE) + 1
+                        val freq: Int
+                        val freqSize: Int
+                        when (type) {
+                            ATTR_PTREE_NODE_TYPE_CHAR -> {
+                                freq = NgramNode.FREQ_CHARACTER
+                                freqSize = 0
+                            }
+                            ATTR_PTREE_NODE_TYPE_WORD_FILLER -> {
+                                freq = NgramNode.FREQ_WORD_FILLER
+                                freqSize = 0
+                            }
+                            ATTR_PTREE_NODE_TYPE_WORD -> {
+                                if (inputStream.readNext(buffer, 1, 1) > 0) {
+                                    freq = buffer[1].toInt() and 0xFF
+                                } else {
+                                    inputStream.close()
+                                    return Result.failure(
+                                        ParseException(
+                                            errorType = ParseException.ErrorType.UNEXPECTED_EOF,
+                                            address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                        )
+                                    )
+                                }
+                                freqSize = 1
+                            }
+                            else -> return Result.failure(Exception("TODO: shortcut not supported"))
+                        }
+                        if (inputStream.readNext(buffer, freqSize + 1, size) > 0) {
+                            val char = String(buffer, freqSize + 1, size, Charsets.UTF_8)[0]
+                            val node = NgramNode(order, char, freq)
+                            val lastOrder = ngramOrderStack.lastOrNull()
+                            if (lastOrder == null) {
+                                ngramTree.higherOrderChildren.add(node)
+                            } else {
+                                if (lastOrder == order) {
+                                    ngramTreeStack.last().sameOrderChildren.add(node)
+                                } else {
+                                    ngramTreeStack.last().higherOrderChildren.add(node)
+                                }
+                            }
+                            ngramOrderStack.add(order)
+                            ngramTreeStack.add(node)
+                            pos += (freqSize + 1 + size)
+                        } else {
+                            inputStream.close()
+                            return Result.failure(
+                                ParseException(
+                                    errorType = ParseException.ErrorType.UNEXPECTED_EOF,
+                                    address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                )
+                            )
+                        }
+                    }
+
+                    (cmd and MASK_BEGIN_HEADER) == CMDB_BEGIN_HEADER -> {
+                        if (pos != 0) {
+                            inputStream.close()
+                            return Result.failure(
+                                ParseException(
+                                    errorType = ParseException.ErrorType.UNEXPECTED_CMD_BEGIN_HEADER,
+                                    address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                )
+                            )
+                        }
+                        version = cmd and ATTR_HEADER_VERSION
+                        if (version != VERSION_0) {
+                            inputStream.close()
+                            return Result.failure(
+                                ParseException(
+                                    errorType = ParseException.ErrorType.UNSUPPORTED_FLICTIONARY_VERSION,
+                                    address = pos,
+                                    cmdByte = cmd.toByte(),
+                                    absoluteDepth = ngramTreeStack.size
+                                )
+                            )
+                        }
+                        if (inputStream.readNext(buffer, 1, 9) > 0) {
+                            val size = (buffer[1].toInt() and 0xFF)
+                            date =
+                                ((buffer[2].toInt() and 0xFF).toLong() shl 56) +
+                                ((buffer[3].toInt() and 0xFF).toLong() shl 48) +
+                                ((buffer[4].toInt() and 0xFF).toLong() shl 40) +
+                                ((buffer[5].toInt() and 0xFF).toLong() shl 32) +
+                                ((buffer[6].toInt() and 0xFF).toLong() shl 24) +
+                                ((buffer[7].toInt() and 0xFF).toLong() shl 16) +
+                                ((buffer[8].toInt() and 0xFF).toLong() shl 8) +
+                                ((buffer[9].toInt() and 0xFF).toLong() shl 0)
+                            if (inputStream.readNext(buffer, 10, size) > 0) {
+                                headerStr = String(buffer, 10, size, Charsets.UTF_8)
+                                ngramOrderStack.add(-1)
+                                ngramTreeStack.add(NgramTree())
+                                pos += (10 + size)
+                            } else {
+                                inputStream.close()
+                                return Result.failure(
+                                    ParseException(
+                                        errorType = ParseException.ErrorType.UNEXPECTED_EOF,
+                                        address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                    )
+                                )
+                            }
+                        } else {
+                            inputStream.close()
+                            return Result.failure(
+                                ParseException(
+                                    errorType = ParseException.ErrorType.UNEXPECTED_EOF,
+                                    address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                )
+                            )
+                        }
+                    }
+
+                    (cmd and MASK_END) == CMDB_END -> {
+                        if (pos == 0) {
+                            inputStream.close()
+                            return Result.failure(
+                                ParseException(
+                                    errorType = ParseException.ErrorType.UNEXPECTED_CMD_END,
+                                    address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                )
+                            )
+                        }
+                        val n = (cmd and ATTR_END_COUNT)
+                        if (n > 0) {
+                            if (n <= ngramTreeStack.size) {
+                                for (c in 0 until n) {
+                                    ngramOrderStack.removeLast()
+                                    ngramTreeStack.removeLast()
+                                }
+                            } else {
+                                inputStream.close()
+                                return Result.failure(
+                                    ParseException(
+                                        errorType = ParseException.ErrorType.UNEXPECTED_ABSOLUTE_DEPTH_DECREASE_BELOW_ZERO,
+                                        address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size - n
+                                    )
+                                )
+                            }
+                        } else {
+                            inputStream.close()
+                            return Result.failure(
+                                ParseException(
+                                    errorType = ParseException.ErrorType.UNEXPECTED_CMD_END_ZERO_VALUE,
+                                    address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                                )
+                            )
+                        }
+                        pos += 1
+                    }
+                    else -> {
+                        inputStream.close()
+                        return Result.failure(
+                            ParseException(
+                                errorType = ParseException.ErrorType.INVALID_CMD_BYTE_PROVIDED,
+                                address = pos, cmdByte = cmd.toByte(), absoluteDepth = ngramTreeStack.size
+                            )
+                        )
+                    }
+                }
+            }
+            inputStream.close()
+
+            if (ngramTreeStack.size != 0) {
+                return Result.failure(
+                    ParseException(
+                        errorType = ParseException.ErrorType.UNEXPECTED_ABSOLUTE_DEPTH_NOT_ZERO_AT_EOF,
+                        address = pos, cmdByte = 0x00.toByte(), absoluteDepth = ngramTreeStack.size
+                    )
+                )
+            }
+
+            return Result.success(
+                Flictionary(
+                    name = "flict",
+                    label = "flict",
+                    authors = listOf(),
+                    headerStr = headerStr ?: "",
+                    date = date,
+                    version = version,
+                    languageModel = FlorisLanguageModel(ngramTree)
+                )
+            )
+        }
+    }
+
+    override fun getDate(): Long = date
+
+    override fun getVersion(): Int = version
+
+    // TODO: preceding tokens are currently ignored
+    override fun getTokenPredictions(
+        precedingTokens: List<Token<String>>,
+        currentToken: Token<String>?,
+        maxSuggestionCount: Int,
+        allowPossiblyOffensive: Boolean
+    ): List<WeightedToken<String, Int>> {
+        currentToken ?: return listOf()
+
+        return if (currentToken.data.isNotEmpty()) {
+            val retList = languageModel.matchAllNgrams(
+                ngram = Ngram(
+                    _tokens = listOf(Token(currentToken.data.toLowerCase(Locale.ENGLISH))),
+                    _freq = -1
+                ),
+                maxEditDistance = 2,
+                maxTokenCount = maxSuggestionCount,
+                allowPossiblyOffensive = allowPossiblyOffensive
+            )
+            retList
+        } else {
+            listOf()
+        }
+    }
+
+    /**
+     * A parse exception to be used by [Flictionary] to indicate where the parsing of a binary file
+     * failed, while also providing some additional information.
+     */
+    class ParseException(
+        private val errorType: ErrorType,
+        private val address: Int,
+        private val cmdByte: Byte,
+        private val absoluteDepth: Int
+    ) : Exception() {
+        enum class ErrorType {
+            UNSUPPORTED_FLICTIONARY_VERSION,
+            UNEXPECTED_CMD_BEGIN_HEADER,
+            UNEXPECTED_CMD_BEGIN_PTREE_NODE,
+            UNEXPECTED_CMD_DEFINE_SHORTCUT,
+            UNEXPECTED_CMD_END,
+            UNEXPECTED_CMD_END_ZERO_VALUE,
+            UNEXPECTED_ABSOLUTE_DEPTH_DECREASE_BELOW_ZERO,
+            UNEXPECTED_ABSOLUTE_DEPTH_NOT_ZERO_AT_EOF,
+            UNEXPECTED_EOF,
+            INVALID_CMD_BYTE_PROVIDED,
+        }
+
+        override val message: String
+            get() = toString()
+        override fun toString(): String {
+            return StringBuilder().run {
+                append(
+                    when (errorType) {
+                        ErrorType.UNSUPPORTED_FLICTIONARY_VERSION -> {
+                            "Unexpected Flictionary version: ${(cmdByte.toInt() and 0xFF) and ATTR_HEADER_VERSION}"
+                        }
+                        ErrorType.UNEXPECTED_CMD_BEGIN_HEADER -> {
+                            "Unexpected command: BEGIN_HEADER"
+                        }
+                        ErrorType.UNEXPECTED_CMD_BEGIN_PTREE_NODE -> {
+                            "Unexpected command: BEGIN_PTREE_NODE"
+                        }
+                        ErrorType.UNEXPECTED_CMD_DEFINE_SHORTCUT -> {
+                            "Unexpected command: DEFINE_SHORTCUT"
+                        }
+                        ErrorType.UNEXPECTED_CMD_END -> {
+                            "Unexpected command: END"
+                        }
+                        ErrorType.UNEXPECTED_CMD_END_ZERO_VALUE -> {
+                            "Unexpected zero value provided for command END"
+                        }
+                        ErrorType.UNEXPECTED_ABSOLUTE_DEPTH_DECREASE_BELOW_ZERO -> {
+                            "Unexpected decrease in absolute depth: cannot go below zero"
+                        }
+                        ErrorType.UNEXPECTED_ABSOLUTE_DEPTH_NOT_ZERO_AT_EOF -> {
+                            "Unexpected non-zero value in absolute depth at end of file"
+                        }
+                        ErrorType.UNEXPECTED_EOF -> {
+                            "Unexpected end of file while try to do look-ahead"
+                        }
+                        ErrorType.INVALID_CMD_BYTE_PROVIDED -> {
+                            "Invalid command byte provided"
+                        }
+                    }
+                )
+                append(
+                    String.format(
+                        "\n at address 0x%08X where cmd_byte=0x%02X and section_depth=%d",
+                        address,
+                        cmdByte,
+                        absoluteDepth
+                    )
+                )
+                toString()
+            }
+        }
+    }
+}
+
+/**
+ * Reads the next [len] bytes from the input stream into the given byte array [b]. This method guarantees to either
+ * read the full length requested or if an EOF file is encountered, -1 is returned. The first byte written is at
+ * `b[off]`, the second byte at `b[off+1]` and so on.
+ *
+ * @param b The byte array to read the next [len] bytes into.
+ * @param off The offset of the first byte written in the byte array [b]. Must be non-negative.
+ * @param len The number of bytes to read. Must be non-negative.
+ *
+ * @return The number of bytes read, always matching [len] or -1 if EOF was encountered.
+ *
+ * @throws IndexOutOfBoundsException if either [off] or [len] is negative or the byte array has insufficient space to
+ *  write the request [len] bytes into it.
+ */
+@Throws(IndexOutOfBoundsException::class)
+fun InputStream.readNext(b: ByteArray, off: Int, len: Int): Int {
+    if (off < 0 || len < 0 || len > b.size - off) {
+        throw IndexOutOfBoundsException()
+    } else if (len == 0) {
+        return 0
+    }
+
+    var lenRead = 0
+    while (lenRead < len) {
+        val c = read()
+        if (c == -1) {
+            return -1
+        } else {
+            b[off + lenRead++] = c.toByte()
+        }
+    }
+    return lenRead
+}

app/src/main/java/dev/patrickgold/florisboard/ime/extension/Asset.kt

@@ -17,8 +17,6 @@
 package dev.patrickgold.florisboard.ime.extension
 
 import android.content.Context
-import com.github.michaelbull.result.Err
-import com.github.michaelbull.result.Result
 
 /**
  * Interface for an Asset to use within FlorisBoard. An asset is everything from a dictionary to a
@@ -61,6 +59,6 @@ interface Asset {
         /**
          * Loads an Asset of type [T] from the specified path.
          */
-        fun fromFile(context: Context, path: String): Result<T, Throwable> = Err(NotImplementedError())
+        fun fromFile(context: Context, path: String): Result<T> = Result.failure(NotImplementedError())
     }
 }

app/src/main/java/dev/patrickgold/florisboard/ime/extension/AssetManager.kt

@@ -17,17 +17,15 @@
 package dev.patrickgold.florisboard.ime.extension
 
 import android.content.Context
-import com.github.michaelbull.result.*
+import android.net.Uri
 import com.squareup.moshi.Moshi
-import com.squareup.moshi.adapters.PolymorphicJsonAdapterFactory
 import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
-import dev.patrickgold.florisboard.ime.popup.PopupExtension
 import dev.patrickgold.florisboard.ime.text.key.KeyTypeAdapter
 import dev.patrickgold.florisboard.ime.text.key.KeyVariationAdapter
 import dev.patrickgold.florisboard.ime.text.layout.LayoutTypeAdapter
-import dev.patrickgold.florisboard.ime.theme.Theme
 import timber.log.Timber
 import java.io.File
+import kotlin.reflect.KClass
 
 class AssetManager private constructor(private val applicationContext: Context) {
     private val moshi: Moshi = Moshi.Builder()
@@ -62,22 +60,22 @@ class AssetManager private constructor(private val applicationContext: Context)
         }
     }
 
-    fun deleteAsset(ref: AssetRef): Result<Nothing?, Throwable> {
+    fun deleteAsset(ref: AssetRef): Result<Unit> {
         return when (ref.source) {
             AssetSource.Internal -> {
                 val file = File(applicationContext.filesDir.absolutePath + "/" + ref.path)
                 if (file.isFile) {
                     val success = file.delete()
                     if (success) {
-                        Ok(null)
+                        Result.success(Unit)
                     } else {
-                        Err(Exception("Could not delete file."))
+                        Result.failure(Exception("Could not delete file."))
                     }
                 } else {
-                    Err(Exception("Provided reference is not a file."))
+                    Result.failure(Exception("Provided reference is not a file."))
                 }
             }
-            else -> Err(Exception("Can not delete an asset in source '${ref.source}'"))
+            else -> Result.failure(Exception("Can not delete an asset in source '${ref.source}'"))
         }
     }
 
@@ -100,7 +98,7 @@ class AssetManager private constructor(private val applicationContext: Context)
         }
     }
 
-    fun <T: Asset> listAssets(ref: AssetRef, assetClass: Class<T>): Result<Map<AssetRef, T>, Throwable> {
+    fun <T : Asset> listAssets(ref: AssetRef, assetClass: KClass<T>): Result<Map<AssetRef, T>> {
         val retMap = mutableMapOf<AssetRef, T>()
         return when (ref.source) {
             AssetSource.Assets -> {
@@ -117,9 +115,9 @@ class AssetManager private constructor(private val applicationContext: Context)
                             }
                         }
                     }
-                    Ok(retMap.toMap())
+                    Result.success(retMap.toMap())
                 } catch (e: Exception) {
-                    Err(e)
+                    Result.failure(e)
                 }
             }
             AssetSource.Internal -> {
@@ -139,19 +137,19 @@ class AssetManager private constructor(private val applicationContext: Context)
                         }
                     }
                 }
-                Ok(retMap.toMap())
+                Result.success(retMap.toMap())
             }
-            else -> Ok(retMap.toMap())
+            else -> Result.success(retMap.toMap())
         }
     }
 
-    fun <T: Asset> loadAsset(ref: AssetRef, assetClass: Class<T>): Result<T, Throwable> {
+    fun <T : Asset> loadAsset(ref: AssetRef, assetClass: KClass<T>): Result<T> {
         val rawJsonData = when (ref.source) {
             is AssetSource.Assets -> {
                 try {
                     applicationContext.assets.open(ref.path).bufferedReader().use { it.readText() }
                 } catch (e: Exception) {
-                    return Err(e)
+                    return Result.failure(e)
                 }
             }
             is AssetSource.Internal -> {
@@ -166,28 +164,67 @@ class AssetManager private constructor(private val applicationContext: Context)
             else -> "{}"
         }
         return try {
-            val adapter = moshi.adapter(assetClass)
+            val adapter = moshi.adapter(assetClass.java)
             val asset = adapter.fromJson(rawJsonData)
             if (asset != null) {
-                Ok(asset)
+                Result.success(asset)
             } else {
-                Err(NullPointerException("Asset failed to load!"))
+                Result.failure(NullPointerException("Asset failed to load!"))
             }
         } catch (e: Exception) {
-            Err(e)
+            Result.failure(e)
         }
     }
 
-    fun <T: Asset> writeAsset(ref: AssetRef, assetClass: Class<T>, asset: T): Result<Boolean, Throwable> {
+    fun <T : Asset> loadAsset(uri: Uri, assetClass: KClass<T>, maxSize: Int): Result<T> {
+        val rawJsonData = ExternalContentUtils.readTextFromUri(applicationContext, uri, maxSize).getOrElse {
+            return Result.failure(it)
+        }
+        return try {
+            val adapter = moshi.adapter(assetClass.java)
+            val asset = adapter.fromJson(rawJsonData)
+            if (asset != null) {
+                Result.success(asset)
+            } else {
+                Result.failure(NullPointerException("Asset failed to load!"))
+            }
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+
+    fun loadAssetRaw(ref: AssetRef): Result<String> {
+        return when (ref.source) {
+            is AssetSource.Assets -> {
+                try {
+                    Result.success(applicationContext.assets.open(ref.path).bufferedReader().use { it.readText() })
+                } catch (e: Exception) {
+                    Result.failure(e)
+                }
+            }
+            is AssetSource.Internal -> {
+                val file = File(applicationContext.filesDir.absolutePath + "/" + ref.path)
+                val contents = readFile(file)
+                if (contents.isBlank()) {
+                    Result.failure(Exception("File is blank!"))
+                } else {
+                    Result.success(contents)
+                }
+            }
+            else -> Result.failure(Exception("Unsupported asset ref!"))
+        }
+    }
+
+    fun <T : Asset> writeAsset(ref: AssetRef, assetClass: KClass<T>, asset: T): Result<Unit> {
         return when (ref.source) {
             AssetSource.Internal -> {
-                val adapter = moshi.adapter(assetClass)
+                val adapter = moshi.adapter(assetClass.java)
                 val rawJson = adapter.toJson(asset)
                 val file = File(applicationContext.filesDir.absolutePath + "/" + ref.path)
                 writeToFile(file, rawJson)
-                Ok(true)
+                Result.success(Unit)
             }
-            else -> Err(Exception("Can not write an asset in source '${ref.source}'"))
+            else -> Result.failure(Exception("Can not write an asset in source '${ref.source}'"))
         }
     }
 

app/src/main/java/dev/patrickgold/florisboard/ime/extension/AssetRef.kt

@@ -16,11 +16,6 @@
 
 package dev.patrickgold.florisboard.ime.extension
 
-import com.github.michaelbull.result.Err
-import com.github.michaelbull.result.Ok
-import com.github.michaelbull.result.Result
-import com.github.michaelbull.result.getOrElse
-
 /**
  * Data class which is a reference to an asset file. It indicates in which storage medium the asset
  * is as well as the relative path to it.
@@ -36,15 +31,15 @@ data class AssetRef(
     companion object {
         private const val DELIMITER: String = ":"
 
-        fun fromString(str: String): Result<AssetRef, String> {
+        fun fromString(str: String): Result<AssetRef> {
             val items = str.split(DELIMITER)
             if (items.size != 2) {
-                return Err("Unexpected length of given asset ref. Make sure that the asset ref string contains exactly 2 items separated by '$DELIMITER'!")
+                return Result.failure(Exception("Unexpected length of given asset ref. Make sure that the asset ref string contains exactly 2 items separated by '$DELIMITER'!"))
             }
             val retSource = AssetSource.fromString(items[0]).getOrElse {
-                return Err(it)
+                return Result.failure(Exception(it))
             }
-            return Ok(AssetRef(retSource, items[1]))
+            return Result.success(AssetRef(retSource, items[1]))
         }
     }
 

app/src/main/java/dev/patrickgold/florisboard/ime/extension/AssetSource.kt

@@ -16,9 +16,6 @@
 
 package dev.patrickgold.florisboard.ime.extension
 
-import com.github.michaelbull.result.Err
-import com.github.michaelbull.result.Ok
-import com.github.michaelbull.result.Result
 import java.util.*
 
 /**
@@ -52,16 +49,16 @@ sealed class AssetSource {
     companion object {
         private val externalRegex: Regex = """^external\\(([a-z]+\\.)*[a-z]+\\)\$""".toRegex()
 
-        fun fromString(str: String): Result<AssetSource, String> {
+        fun fromString(str: String): Result<AssetSource> {
             return when (val string = str.toLowerCase(Locale.ENGLISH)) {
-                "assets" -> Ok(Assets)
-                "internal" -> Ok(Internal)
+                "assets" -> Result.success(Assets)
+                "internal" -> Result.success(Internal)
                 else -> {
                     if (string.matches(externalRegex)) {
                         val packageName = string.substring(9, string.length - 1)
-                        Ok(External(packageName))
+                        Result.success(External(packageName))
                     } else {
-                        Err("'$str' is not a valid AssetSource.")
+                        Result.failure(Exception("'$str' is not a valid AssetSource."))
                     }
                 }
             }

app/src/main/java/dev/patrickgold/florisboard/ime/extension/ExternalContentUtils.kt

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.extension
+
+import android.content.Context
+import android.net.Uri
+
+class ExternalContentUtils private constructor() {
+    companion object {
+        fun readTextFromUri(context: Context, uri: Uri, maxSize: Int): Result<String> {
+            val contentResolver = context.contentResolver
+                ?: return Result.failure(NullPointerException("System content resolver not available"))
+            val inputStream = contentResolver.openInputStream(uri)
+                ?: return Result.failure(NullPointerException("Cannot open input stream for given uri '$uri'"))
+            val assetFileDescriptor = contentResolver.openAssetFileDescriptor(uri, "r")
+                ?: return Result.failure(NullPointerException("Cannot open asset file descriptor for given uri '$uri'"))
+            if (assetFileDescriptor.length > maxSize) {
+                return Result.failure(Exception("Contents of given uri '$uri' exceeds maximum size of $maxSize bytes!"))
+            }
+            val rawText = inputStream.bufferedReader(Charsets.UTF_8).use { it.readText() }
+            return Result.success(rawText)
+        }
+
+        fun writeTextToUri(context: Context, uri: Uri, text: String): Result<Unit> {
+            val contentResolver = context.contentResolver
+                ?: return Result.failure(NullPointerException("System content resolver not available"))
+            // Must use "rwt" mode to ensure destination file length is truncated after writing.
+            val outputStream = contentResolver.openOutputStream(uri, "rwt")
+                ?: return Result.failure(NullPointerException("Cannot open output stream for given uri '$uri'"))
+            outputStream.bufferedWriter(Charsets.UTF_8).use { it.write(text) }
+            return Result.success(Unit)
+        }
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/media/MediaInputManager.kt

@@ -17,7 +17,6 @@
 package dev.patrickgold.florisboard.ime.media
 
 import android.annotation.SuppressLint
-import android.os.Handler
 import android.view.MotionEvent
 import android.view.View
 import android.widget.*
@@ -25,16 +24,13 @@ import com.google.android.material.tabs.TabLayout
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.core.EditorInstance
 import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.core.InputKeyEvent
 import dev.patrickgold.florisboard.ime.core.InputView
 import dev.patrickgold.florisboard.ime.media.emoji.EmojiKeyData
 import dev.patrickgold.florisboard.ime.media.emoji.EmojiKeyboardView
 import dev.patrickgold.florisboard.ime.media.emoticon.EmoticonKeyData
 import dev.patrickgold.florisboard.ime.media.emoticon.EmoticonKeyboardView
-import dev.patrickgold.florisboard.ime.text.key.KeyCode
 import dev.patrickgold.florisboard.ime.text.key.KeyData
-import dev.patrickgold.florisboard.ime.text.key.KeyType
-import dev.patrickgold.florisboard.util.cancelAll
-import dev.patrickgold.florisboard.util.postAtScheduledRate
 import kotlinx.coroutines.*
 import timber.log.Timber
 import java.util.*
@@ -58,11 +54,10 @@ class MediaInputManager private constructor() : CoroutineScope by MainScope(),
 
     private var activeTab: Tab? = null
     private var mediaViewFlipper: ViewFlipper? = null
-    private var repeatedKeyPressHandler: Handler? = null
     private var tabLayout: TabLayout? = null
     private val tabViews = EnumMap<Tab, LinearLayout>(Tab::class.java)
 
-    var mediaViewGroup: LinearLayout? = null
+    private var mediaViewGroup: LinearLayout? = null
 
     companion object {
         private var instance: MediaInputManager? = null
@@ -80,11 +75,6 @@ class MediaInputManager private constructor() : CoroutineScope by MainScope(),
         florisboard.addEventListener(this)
     }
 
-    override fun onCreateInputView() {
-        super.onCreateInputView()
-        repeatedKeyPressHandler = Handler(florisboard.context.mainLooper)
-    }
-
     /**
      * Called when a new input view has been registered. Used to initialize all media-relevant
      * views and layouts.
@@ -145,30 +135,21 @@ class MediaInputManager private constructor() : CoroutineScope by MainScope(),
     private fun onBottomButtonEvent(view: View, event: MotionEvent?): Boolean {
         event ?: return false
         val data = when (view.id) {
-            R.id.media_input_switch_to_text_input_button -> {
-                KeyData(code = KeyCode.SWITCH_TO_TEXT_CONTEXT)
-            }
-            R.id.media_input_backspace_button -> {
-                KeyData(code = KeyCode.DELETE, type = KeyType.ENTER_EDITING)
-            }
-            else -> null
+            R.id.media_input_switch_to_text_input_button -> KeyData.SWITCH_TO_TEXT_CONTEXT
+            R.id.media_input_backspace_button -> KeyData.DELETE
+            else -> return false
         }
         when (event.actionMasked) {
             MotionEvent.ACTION_DOWN -> {
                 florisboard.keyPressVibrate()
                 florisboard.keyPressSound(data)
-                if (data?.code == KeyCode.DELETE && data.type == KeyType.ENTER_EDITING) {
-                    val delayMillis = florisboard.prefs.keyboard.longPressDelay.toLong()
-                    repeatedKeyPressHandler?.postAtScheduledRate(delayMillis, 25) {
-                        florisboard.textInputManager.sendKeyPress(data)
-                    }
-                }
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.down(data))
             }
-            MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
-                repeatedKeyPressHandler?.cancelAll()
-                if (event.actionMasked != MotionEvent.ACTION_CANCEL && data != null) {
-                    florisboard.textInputManager.sendKeyPress(data)
-                }
+            MotionEvent.ACTION_UP -> {
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.up(data))
+            }
+            MotionEvent.ACTION_CANCEL -> {
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.cancel(data))
             }
         }
         // MUST return false here so the background selector for showing a transparent bg works

app/src/main/java/dev/patrickgold/florisboard/ime/media/emoji/EmojiKeyView.kt

@@ -33,6 +33,8 @@ import dev.patrickgold.florisboard.ime.core.PrefHelper
 import dev.patrickgold.florisboard.ime.text.key.KeyHintMode
 import dev.patrickgold.florisboard.ime.theme.Theme
 import dev.patrickgold.florisboard.ime.theme.ThemeManager
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.MainScope
 
 /**
  * View class for managing the rendering and the events of a single emoji keyboard key.
@@ -46,7 +48,7 @@ import dev.patrickgold.florisboard.ime.theme.ThemeManager
 class EmojiKeyView(
     private val emojiKeyboardView: EmojiKeyboardView,
     val data: EmojiKeyData
-) : androidx.appcompat.widget.AppCompatTextView(emojiKeyboardView.context),
+) : androidx.appcompat.widget.AppCompatTextView(emojiKeyboardView.context), CoroutineScope by MainScope(),
     FlorisBoard.EventListener, ThemeManager.OnThemeUpdatedListener {
     private val florisboard: FlorisBoard? = FlorisBoard.getInstanceOrNull()
     private val prefs: PrefHelper = PrefHelper.getDefaultInstance(context)

app/src/main/java/dev/patrickgold/florisboard/ime/media/emoji/EmojiLayoutData.kt

@@ -19,13 +19,11 @@ package dev.patrickgold.florisboard.ime.media.emoji
 import android.content.Context
 import android.graphics.Paint
 import android.graphics.Typeface
-import android.util.Log
 import androidx.core.graphics.PaintCompat
 import timber.log.Timber
 import java.io.BufferedReader
 import java.io.IOException
 import java.io.InputStreamReader
-import java.lang.Exception
 import java.util.*
 
 private const val GROUP_IDENTIFIER          = "# group: "

app/src/main/java/dev/patrickgold/florisboard/ime/nlp/FlorisLanguageModel.kt

@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.nlp
+
+/**
+ * Represents the root node to a n-gram tree.
+ */
+open class NgramTree(
+    sameOrderChildren: MutableList<NgramNode> = mutableListOf(),
+    higherOrderChildren: MutableList<NgramNode> = mutableListOf()
+) : NgramNode(0, '?', -1, sameOrderChildren, higherOrderChildren)
+
+/**
+ * A node of a n-gram tree, which holds the character it represents, the corresponding frequency,
+ * a pre-computed string representing all parent characters and the current one as well as child
+ * nodes, one for the same order n-gram nodes and one for the higher order n-gram nodes.
+ */
+open class NgramNode(
+    val order: Int,
+    val char: Char,
+    val freq: Int,
+    val sameOrderChildren: MutableList<NgramNode> = mutableListOf(),
+    val higherOrderChildren: MutableList<NgramNode> = mutableListOf()
+) {
+    companion object {
+        const val FREQ_CHARACTER = -1
+        const val FREQ_WORD_MIN = 0
+        const val FREQ_WORD_MAX = 255
+        const val FREQ_WORD_FILLER = -2
+        const val FREQ_IS_POSSIBLY_OFFENSIVE = 0
+    }
+
+    val isCharacter: Boolean
+        get() = freq == FREQ_CHARACTER
+
+    val isWord: Boolean
+        get() = freq in FREQ_WORD_MIN..FREQ_WORD_MAX
+
+    val isWordFiller: Boolean
+        get() = freq == FREQ_WORD_FILLER
+
+    val isPossiblyOffensive: Boolean
+        get() = freq == FREQ_IS_POSSIBLY_OFFENSIVE
+
+    fun findWord(word: String): NgramNode? {
+        var currentNode = this
+        for ((pos, char) in word.withIndex()) {
+            val childNode = if (pos == 0) {
+                currentNode.higherOrderChildren.find { it.char == char }
+            } else {
+                currentNode.sameOrderChildren.find { it.char == char }
+            }
+            if (childNode != null) {
+                currentNode = childNode
+            } else {
+                return null
+            }
+        }
+        return if (currentNode.isWord || currentNode.isWordFiller) {
+            currentNode
+        } else {
+            null
+        }
+    }
+
+    /**
+     * This function allows to search for a given [input] word with a given [maxEditDistance] and
+     * adds all matches in the trie to the [list].
+     */
+    fun listSimilarWords(
+        input: String,
+        list: StagedSuggestionList<String, Int>,
+        word: StringBuilder,
+        allowPossiblyOffensive: Boolean,
+        maxEditDistance: Int,
+        deletionCost: Int = 0,
+        insertionCost: Int = 0,
+        substitutionCost: Int = 0,
+        pos: Int = -1
+    ) {
+        if (pos > -1) {
+            word.append(char)
+        }
+        val costSum = deletionCost + insertionCost + substitutionCost
+        if (pos > -1 && (pos + 1 == input.length) && isWord && ((isPossiblyOffensive && allowPossiblyOffensive)
+            || !isPossiblyOffensive)) {
+            // Using shift right instead of divide by 2^(costSum) as it is mathematically the
+            // same but faster.
+            if (list.canAdd(freq shr costSum)) {
+                list.add(word.toString(), freq shr costSum)
+            }
+        }
+        if (pos <= -1) {
+            for (childNode in higherOrderChildren) {
+                childNode.listSimilarWords(
+                    input, list, word, allowPossiblyOffensive, maxEditDistance, 0, 0, 0, 0
+                )
+            }
+        } else if (maxEditDistance == costSum) {
+            if (pos + 1 < input.length) {
+                sameOrderChildren.find { it.char == input[pos + 1] }?.listSimilarWords(
+                    input, list, word, allowPossiblyOffensive, maxEditDistance,
+                    deletionCost, insertionCost, substitutionCost, pos + 1
+                )
+            }
+        } else {
+            // Delete
+            if (pos + 2 < input.length) {
+                sameOrderChildren.find { it.char == input[pos + 2] }?.listSimilarWords(
+                    input, list, word, allowPossiblyOffensive, maxEditDistance,
+                    deletionCost + 1, insertionCost, substitutionCost, pos + 2
+                )
+            }
+            for (childNode in sameOrderChildren) {
+                if (pos + 1 < input.length && childNode.char == input[pos + 1]) {
+                    childNode.listSimilarWords(
+                        input, list, word, allowPossiblyOffensive, maxEditDistance,
+                        deletionCost, insertionCost, substitutionCost, pos + 1
+                    )
+                } else  {
+                    // Insert
+                    childNode.listSimilarWords(
+                        input, list, word, allowPossiblyOffensive, maxEditDistance,
+                        deletionCost, insertionCost + 1, substitutionCost, pos
+                    )
+                    if (pos + 1 < input.length) {
+                        // Substitute
+                        childNode.listSimilarWords(
+                            input, list, word, allowPossiblyOffensive, maxEditDistance,
+                            deletionCost, insertionCost, substitutionCost + 1, pos + 1
+                        )
+                    }
+                }
+            }
+        }
+        if (pos > -1) {
+            word.deleteAt(word.lastIndex)
+        }
+    }
+
+    fun listAllSameOrderWords(list: StagedSuggestionList<String, Int>, word: StringBuilder, allowPossiblyOffensive: Boolean) {
+        word.append(char)
+        if (isWord && ((isPossiblyOffensive && allowPossiblyOffensive) || !isPossiblyOffensive)) {
+            if (list.canAdd(freq)) {
+                list.add(word.toString(), freq)
+            }
+        }
+        for (childNode in sameOrderChildren) {
+            childNode.listAllSameOrderWords(list, word, allowPossiblyOffensive)
+        }
+        word.deleteAt(word.lastIndex)
+    }
+}
+
+open class FlorisLanguageModel(
+    initTreeObj: NgramTree? = null
+) : LanguageModel<String, Int> {
+    protected val ngramTree: NgramTree = initTreeObj ?: NgramTree()
+
+    override fun getNgram(vararg tokens: String): Ngram<String, Int> {
+        val ngramOut = getNgramOrNull(*tokens)
+        if (ngramOut != null) {
+            return ngramOut
+        } else {
+            throw NullPointerException("No n-gram found matching the given tokens: $tokens")
+        }
+    }
+
+    override fun getNgram(ngram: Ngram<String, Int>): Ngram<String, Int> {
+        val ngramOut = getNgramOrNull(ngram)
+        if (ngramOut != null) {
+            return ngramOut
+        } else {
+            throw NullPointerException("No n-gram found matching the given ngram: $ngram")
+        }
+    }
+
+    override fun getNgramOrNull(vararg tokens: String): Ngram<String, Int>? {
+        var currentNode: NgramNode = ngramTree
+        for (token in tokens) {
+            val childNode = currentNode.findWord(token)
+            if (childNode != null) {
+                currentNode = childNode
+            } else {
+                return null
+            }
+        }
+        return Ngram(tokens.toList().map { Token(it) }, currentNode.freq)
+    }
+
+    override fun getNgramOrNull(ngram: Ngram<String, Int>): Ngram<String, Int>? {
+        return getNgramOrNull(*ngram.tokens.toStringList().toTypedArray())
+    }
+
+    override fun hasNgram(ngram: Ngram<String, Int>, doMatchFreq: Boolean): Boolean {
+        val result = getNgramOrNull(ngram)
+        return if (result != null) {
+            if (doMatchFreq) {
+                ngram.freq == result.freq
+            } else {
+                true
+            }
+        } else {
+            false
+        }
+    }
+
+    override fun matchAllNgrams(
+        ngram: Ngram<String, Int>,
+        maxEditDistance: Int,
+        maxTokenCount: Int,
+        allowPossiblyOffensive: Boolean
+    ): List<WeightedToken<String, Int>> {
+        val ngramList = mutableListOf<WeightedToken<String, Int>>()
+        var currentNode: NgramNode = ngramTree
+        for ((t, token) in ngram.tokens.withIndex()) {
+            val word = token.data
+            if (t + 1 >= ngram.tokens.size) {
+                if (word.isNotEmpty()) {
+                    // The last word is not complete, so find all possible words and sort
+                    val splitWord = mutableListOf<Char>()
+                    var splitNode: NgramNode? = currentNode
+                    for ((pos, char) in word.withIndex()) {
+                        val node = if (pos == 0) {
+                            splitNode?.higherOrderChildren?.find { it.char == char }
+                        } else {
+                            splitNode?.sameOrderChildren?.find { it.char == char }
+                        }
+                        splitWord.add(char)
+                        splitNode = node
+                        if (node == null) {
+                            break
+                        }
+                    }
+                    if (splitNode != null) {
+                        // Input thus far is valid
+                        val wordNodes = StagedSuggestionList<String, Int>(maxTokenCount)
+                        val strBuilder = StringBuilder().append(word.substring(0, word.length - 1))
+                        splitNode.listAllSameOrderWords(wordNodes, strBuilder, allowPossiblyOffensive)
+                        ngramList.addAll(wordNodes)
+                    }
+                    if (ngramList.size < maxTokenCount) {
+                        val wordNodes = StagedSuggestionList<String, Int>(maxTokenCount)
+                        val strBuilder = StringBuilder()
+                        currentNode.listSimilarWords(word, wordNodes, strBuilder, allowPossiblyOffensive, maxEditDistance)
+                        ngramList.addAll(wordNodes)
+                    }
+                }
+            } else {
+                val node = currentNode.findWord(word)
+                if (node == null) {
+                    return ngramList
+                } else {
+                    currentNode = node
+                }
+            }
+        }
+        return ngramList
+    }
+
+    fun toFlorisMutableLanguageModel(): FlorisMutableLanguageModel = FlorisMutableLanguageModel(ngramTree)
+}
+
+open class FlorisMutableLanguageModel(
+    initTreeObj: NgramTree? = null
+) : MutableLanguageModel<String, Int>, FlorisLanguageModel(initTreeObj) {
+    override fun deleteNgram(ngram: Ngram<String, Int>) {
+        TODO("Not yet implemented")
+    }
+
+    override fun insertNgram(ngram: Ngram<String, Int>) {
+        TODO("Not yet implemented")
+    }
+
+    override fun updateNgram(ngram: Ngram<String, Int>) {
+        TODO("Not yet implemented")
+    }
+
+    fun toFlorisLanguageModel(): FlorisLanguageModel = FlorisLanguageModel(ngramTree)
+}

app/src/main/java/dev/patrickgold/florisboard/ime/nlp/LanguageModel.kt

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.nlp
+
+/**
+ * Abstract interface for a language model. Can house any n-grams with a minimum order of one.
+ */
+interface LanguageModel<T : Any, F : Comparable<F>> {
+    /**
+     * Tries to get the n-gram for the passed [tokens]. Throws a NPE if no match could be found.
+     */
+    @Throws(NullPointerException::class)
+    fun getNgram(vararg tokens: T): Ngram<T, F>
+
+    /**
+     * Tries to get the n-gram for the passed [ngram], whereas the frequency is ignored while
+     * searching. Throws a NPE if no match could be found.
+     */
+    @Throws(NullPointerException::class)
+    fun getNgram(ngram: Ngram<T, F>): Ngram<T, F>
+
+    /**
+     * Tries to get the n-gram for the passed [tokens]. Returns null if no match could be found.
+     */
+    fun getNgramOrNull(vararg tokens: T): Ngram<T, F>?
+
+    /**
+     * Tries to get the n-gram for the passed [ngram], whereas the frequency is ignored while
+     * searching. Returns null if no match could be found.
+     */
+    fun getNgramOrNull(ngram: Ngram<T, F>): Ngram<T, F>?
+
+    /**
+     * Checks if a given [ngram] exists within this model. If [doMatchFreq] is set to true, the
+     * frequency is also matched.
+     */
+    fun hasNgram(ngram: Ngram<T, F>, doMatchFreq: Boolean = false): Boolean
+
+    /**
+     * Matches all n-grams which match the given [ngram], whereas the last item in the n-gram is
+     * is used to search for predictions.
+     */
+    fun matchAllNgrams(
+        ngram: Ngram<T, F>,
+        maxEditDistance: Int,
+        maxTokenCount: Int,
+        allowPossiblyOffensive: Boolean
+    ): List<WeightedToken<T, F>>
+}
+
+/**
+ * Mutable version of [LanguageModel].
+ */
+interface MutableLanguageModel<T : Any, F : Comparable<F>> : LanguageModel<T, F> {
+    fun deleteNgram(ngram: Ngram<T, F>)
+
+    fun insertNgram(ngram: Ngram<T, F>)
+
+    fun updateNgram(ngram: Ngram<T, F>)
+}

app/src/main/java/dev/patrickgold/florisboard/ime/nlp/Ngram.kt

@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.nlp
+
+/**
+ * Abstract interface representing a n-gram of tokens. Each n-gram instance can be assigned a
+ * unique frequency [freq].
+ */
+open class Ngram<T : Any, F : Comparable<F>>(_tokens: List<Token<T>>, _freq: F) {
+    companion object {
+        /** Constant order value for unigrams. */
+        const val ORDER_UNIGRAM: Int = 1
+
+        /** Constant order value for bigrams. */
+        const val ORDER_BIGRAM: Int = 2
+
+        /** Constant order value for trigrams. */
+        const val ORDER_TRIGRAM: Int = 3
+    }
+
+    init {
+        if (_tokens.size < ORDER_UNIGRAM) {
+            throw Exception("A n-gram must contain at least 1 token!")
+        }
+    }
+
+    /**
+     * A list of tokens for this n-gram. The length of this list is guaranteed to be matching
+     * [order].
+     */
+    val tokens: List<Token<T>> = _tokens
+
+    /**
+     * The frequency value of this n-gram.
+     */
+    val freq: F = _freq
+
+    /**
+     * The order of this n-gram (1, 2, 3, ...).
+     */
+    val order: Int
+        get() = tokens.size
+}
+
+/**
+ * Abstract interface representing a token used in [Ngram].
+ */
+open class Token<T : Any>(_data: T) {
+    /**
+     * The data of this token.
+     */
+    val data: T = _data
+
+    override fun toString(): String {
+        return "Token(\"$data\")"
+    }
+
+    override fun hashCode(): Int {
+        return data.hashCode()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as Token<*>
+
+        if (data != other.data) return false
+
+        return true
+    }
+}
+
+/**
+ * Same as [Token] but allows to add a frequency value [freq].
+ */
+open class WeightedToken<T : Any, F : Comparable<F>>(_data: T, _freq: F) : Token<T>(_data) {
+    /**
+     * The frequency of this weighed token.
+     */
+    val freq: F = _freq
+
+    override fun toString(): String {
+        return "WeightedToken(\"$data\", $freq)"
+    }
+
+    override fun hashCode(): Int {
+        return data.hashCode() + 31 * freq.hashCode()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as WeightedToken<*, *>
+
+        if (data != other.data || freq != other.freq) return false
+
+        return true
+    }
+}
+
+/**
+ * Converts a list of tokens carrying [CharSequence] data to a list of [CharSequence].
+ */
+fun List<Token<CharSequence>>.toCharSequenceList(): List<CharSequence> {
+    return this.map { it.data }
+}
+
+/**
+ * Converts a list of tokens carrying [String] data to a list of [String].
+ */
+fun List<Token<String>>.toStringList(): List<String> {
+    return this.map { it.data }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/nlp/StagedSuggestionList.kt

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.nlp
+
+class StagedSuggestionList<T : Any, F : Comparable<F>>(
+    private val maxSize: Int
+) : Collection<WeightedToken<T, F>> {
+    private val internalArray: Array<WeightedToken<T, F>?> = Array(maxSize) { null }
+    private var internalSize: Int = 0
+
+    override val size: Int
+        get() = internalSize
+
+    fun add(token: T, freq: F): Boolean {
+        if (internalSize < maxSize) {
+            internalArray[internalSize++] = WeightedToken(token, freq)
+            internalArray.sortByDescending { it?.freq }
+            return true
+        } else {
+            if (internalArray.last()!!.freq < freq) {
+                internalArray[internalArray.lastIndex] = WeightedToken(token, freq)
+                internalArray.sortByDescending { it?.freq }
+                return true
+            }
+            return false
+        }
+    }
+
+    fun canAdd(freq: F): Boolean {
+        return internalSize < maxSize || internalArray.last()!!.freq < freq
+    }
+
+    fun clear() {
+        for (n in internalArray.indices) {
+            internalArray[n] = null
+        }
+        internalSize = 0
+    }
+
+    override fun contains(element: WeightedToken<T, F>): Boolean = internalArray.contains(element)
+
+    override fun containsAll(elements: Collection<WeightedToken<T, F>>): Boolean {
+        elements.forEach { if (!contains(it)) return false }
+        return true
+    }
+
+    @Throws(IndexOutOfBoundsException::class)
+    operator fun get(index: Int): WeightedToken<T, F> {
+        val element = getOrNull(index)
+        if (element == null) {
+            throw IndexOutOfBoundsException("The specified index $index is not within the bounds of this list!")
+        } else {
+            return element
+        }
+    }
+
+    fun getOrNull(index: Int): WeightedToken<T, F>? {
+        return internalArray.getOrNull(index)
+    }
+
+    override fun isEmpty(): Boolean = internalSize <= 0
+
+    override fun iterator(): Iterator<WeightedToken<T, F>> {
+        return StagedIterator(this)
+    }
+
+    class StagedIterator<T : Any, F : Comparable<F>> internal constructor (
+        private val stagedSuggestionList: StagedSuggestionList<T, F>
+    ) : Iterator<WeightedToken<T, F>> {
+        var index = 0
+
+        override fun next(): WeightedToken<T, F> = stagedSuggestionList[index++]
+
+        override fun hasNext(): Boolean = stagedSuggestionList.getOrNull(index) != null
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/nlp/TextProcessor.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.nlp
+
+class TextProcessor {
+    data class Word(
+        val word: String,
+        val isPossiblyOffensive: Boolean = false
+    )
+}

app/src/main/java/dev/patrickgold/florisboard/ime/onehanded/OneHandedMode.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.onehanded
+
+/**
+ * Static object which contains all possible one-handed mode strings.
+ */
+object OneHandedMode {
+    const val OFF: String = "off"
+    const val START: String = "start"
+    const val END: String = "end"
+}

app/src/main/java/dev/patrickgold/florisboard/ime/onehanded/OneHandedPanel.kt

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2021 Patrick Goldinger
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.patrickgold.florisboard.ime.onehanded
+
+import android.content.Context
+import android.content.res.ColorStateList
+import android.util.AttributeSet
+import android.view.Gravity
+import android.widget.ImageButton
+import android.widget.LinearLayout
+import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.theme.Theme
+import dev.patrickgold.florisboard.ime.theme.ThemeManager
+
+class OneHandedPanel : LinearLayout, ThemeManager.OnThemeUpdatedListener {
+    private var florisboard: FlorisBoard? = null
+    private var themeManager: ThemeManager? = null
+
+    private var closeBtn: ImageButton? = null
+    private var moveBtn: ImageButton? = null
+
+    private val panelSide: String
+
+    constructor(context: Context) : this(context, null)
+    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
+    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
+        context.obtainStyledAttributes(attrs, R.styleable.OneHandedPanel).apply {
+            panelSide = getString(R.styleable.OneHandedPanel_panelSide) ?: OneHandedMode.START
+            recycle()
+        }
+        orientation = VERTICAL
+        gravity = Gravity.CENTER_VERTICAL
+    }
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+        florisboard = FlorisBoard.getInstanceOrNull()
+        themeManager = ThemeManager.defaultOrNull()
+
+        closeBtn = findViewWithTag("one_handed_ctrl_close")
+        closeBtn?.setOnClickListener {
+            florisboard?.let {
+                it.prefs.keyboard.oneHandedMode = OneHandedMode.OFF
+                it.updateOneHandedPanelVisibility()
+            }
+        }
+        moveBtn = findViewWithTag("one_handed_ctrl_move")
+        moveBtn?.setOnClickListener {
+            florisboard?.let {
+                it.prefs.keyboard.oneHandedMode = panelSide
+                it.updateOneHandedPanelVisibility()
+            }
+        }
+
+        themeManager?.registerOnThemeUpdatedListener(this)
+    }
+
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        florisboard = null
+        themeManager?.unregisterOnThemeUpdatedListener(this)
+        themeManager = null
+
+        closeBtn?.setOnClickListener(null)
+        closeBtn = null
+        moveBtn?.setOnClickListener(null)
+        moveBtn = null
+    }
+
+    override fun onThemeUpdated(theme: Theme) {
+        setBackgroundColor(theme.getAttr(Theme.Attr.ONE_HANDED_BACKGROUND).toSolidColor().color)
+        ColorStateList.valueOf(theme.getAttr(Theme.Attr.ONE_HANDED_FOREGROUND).toSolidColor().color).also {
+            closeBtn?.imageTintList = it
+            moveBtn?.imageTintList = it
+        }
+        closeBtn?.invalidate()
+        moveBtn?.invalidate()
+        invalidate()
+    }
+
+    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+        val florisboard = florisboard ?: return super.onMeasure(widthMeasureSpec, heightMeasureSpec)
+        val width = (florisboard.inputView?.measuredWidth ?: 0) *
+            ((100 - florisboard.prefs.keyboard.oneHandedModeScaleFactor) / 100.0f)
+        super.onMeasure(MeasureSpec.makeMeasureSpec(width.toInt(),  MeasureSpec.EXACTLY), heightMeasureSpec)
+    }
+}

app/src/main/java/dev/patrickgold/florisboard/ime/popup/PopupLayerView.kt

@@ -18,10 +18,15 @@ package dev.patrickgold.florisboard.ime.popup
 
 import android.annotation.SuppressLint
 import android.content.Context
+import android.graphics.Rect
 import android.util.AttributeSet
 import android.view.MotionEvent
+import android.view.View
 import android.view.ViewGroup
 import android.widget.FrameLayout
+import dev.patrickgold.florisboard.ime.clip.ClipboardPopupManager
+import dev.patrickgold.florisboard.ime.clip.ClipboardPopupView
+import timber.log.Timber
 
 /**
  * Basic helper view class which acts as a non-interactive layer view, which sits above the whole
@@ -41,12 +46,29 @@ class PopupLayerView : FrameLayout {
         )
     }
 
+    var clipboardPopupManager: ClipboardPopupManager? = null
+    var intercept: ClipboardPopupView? = null
+    var shouldIntercept = true
+
     override fun onInterceptTouchEvent(ev: MotionEvent?): Boolean {
+        if (ev != null) {
+            intercept?.run {
+                val viewRect = Rect()
+                getGlobalVisibleRect(viewRect)
+                return when {
+                    !viewRect.contains(ev.x.toInt(), ev.y.toInt()) -> {
+                        clipboardPopupManager?.hide()
+                        true
+                    }
+                    else -> false
+                }
+            }
+        }
         return true
     }
 
     @SuppressLint("ClickableViewAccessibility")
-    override fun onTouchEvent(event: MotionEvent?): Boolean {
+    override fun onTouchEvent(ev: MotionEvent?): Boolean {
         return false
     }
 }

app/src/main/java/dev/patrickgold/florisboard/ime/popup/PopupManager.kt

@@ -17,7 +17,9 @@
 package dev.patrickgold.florisboard.ime.popup
 
 import android.content.res.Configuration
-import android.view.*
+import android.view.Gravity
+import android.view.MotionEvent
+import android.view.View
 import androidx.core.content.ContextCompat.getDrawable
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.media.emoji.EmojiKeyData
@@ -46,7 +48,8 @@ class PopupManager<T_KBD: View, T_KV: View>(
         KeyCode.ENTER,
         KeyCode.LANGUAGE_SWITCH,
         KeyCode.SWITCH_TO_TEXT_CONTEXT,
-        KeyCode.SWITCH_TO_MEDIA_CONTEXT
+        KeyCode.SWITCH_TO_MEDIA_CONTEXT,
+        KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT
     )
     private var keyPopupWidth: Int
     private var keyPopupHeight: Int
@@ -106,6 +109,11 @@ class PopupManager<T_KBD: View, T_KV: View>(
                             PopupExtendedView.Element.Icon(it, adjustedIndex)
                         } ?: PopupExtendedView.Element.Undefined
                     }
+                    KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT -> {
+                        getDrawable(keyView.context, R.drawable.ic_assignment)?.let {
+                            PopupExtendedView.Element.Icon(it, adjustedIndex)
+                        } ?: PopupExtendedView.Element.Undefined
+                    }
                     KeyCode.URI_COMPONENT_TLD -> {
                         PopupExtendedView.Element.Tld(
                             keyView.data.popup[adjustedIndex].label, adjustedIndex

app/src/main/java/dev/patrickgold/florisboard/ime/text/TextInputManager.kt

@@ -18,15 +18,19 @@ package dev.patrickgold.florisboard.ime.text
 
 import android.animation.ObjectAnimator
 import android.animation.ValueAnimator
-import android.content.Context
-import android.os.Handler
 import android.view.KeyEvent
-import android.view.inputmethod.*
 import android.widget.LinearLayout
 import android.widget.Toast
 import android.widget.ViewFlipper
+import dev.patrickgold.florisboard.BuildConfig
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.core.*
+import dev.patrickgold.florisboard.ime.dictionary.Dictionary
+import dev.patrickgold.florisboard.ime.dictionary.DictionaryManager
+import dev.patrickgold.florisboard.ime.extension.AssetRef
+import dev.patrickgold.florisboard.ime.extension.AssetSource
+import dev.patrickgold.florisboard.ime.nlp.Token
+import dev.patrickgold.florisboard.ime.nlp.toStringList
 import dev.patrickgold.florisboard.ime.text.editing.EditingKeyboardView
 import dev.patrickgold.florisboard.ime.text.gestures.SwipeAction
 import dev.patrickgold.florisboard.ime.text.key.*
@@ -50,7 +54,7 @@ import kotlin.math.roundToLong
  * TextInputManager is also the hub in the communication between the system, the active editor
  * instance and the Smartbar.
  */
-class TextInputManager private constructor() : CoroutineScope by MainScope(),
+class TextInputManager private constructor() : CoroutineScope by MainScope(), InputKeyEventReceiver,
     FlorisBoard.EventListener, SmartbarView.EventListener {
 
     private val florisboard = FlorisBoard.getInstance()
@@ -62,26 +66,37 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
     private val keyboardViews = EnumMap<KeyboardMode, KeyboardView>(KeyboardMode::class.java)
     private var editingKeyboardView: EditingKeyboardView? = null
     private var loadingPlaceholderKeyboard: KeyboardView? = null
-    private val osHandler = Handler()
     private var textViewFlipper: ViewFlipper? = null
     private var textViewGroup: LinearLayout? = null
+    private val dictionaryManager: DictionaryManager = DictionaryManager.default()
+    private var activeDictionary: Dictionary<String, Int>? = null
+    val inputEventDispatcher: InputEventDispatcher = InputEventDispatcher.new(
+        parentScope = this,
+        repeatableKeyCodes = intArrayOf(
+            KeyCode.ARROW_DOWN,
+            KeyCode.ARROW_LEFT,
+            KeyCode.ARROW_RIGHT,
+            KeyCode.ARROW_UP,
+            KeyCode.DELETE,
+            KeyCode.FORWARD_DELETE
+        )
+    )
 
     var keyVariation: KeyVariation = KeyVariation.NORMAL
     val layoutManager = LayoutManager(florisboard)
     private var smartbarView: SmartbarView? = null
 
-    // Caps/Space related properties
+    // Caps/Shift related properties
     var caps: Boolean = false
         private set
     var capsLock: Boolean = false
         private set
-    private var hasCapsRecentlyChanged: Boolean = false
-    private var hasSpaceRecentlyPressed: Boolean = false
+    private var newCapsState: Boolean = false
 
     // Composing text related properties
     var isManualSelectionMode: Boolean = false
-    private var isManualSelectionModeLeft: Boolean = false
-    private var isManualSelectionModeRight: Boolean = false
+    private var isManualSelectionModeStart: Boolean = false
+    private var isManualSelectionModeEnd: Boolean = false
 
     companion object {
         private var instance: TextInputManager? = null
@@ -106,6 +121,7 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
     override fun onCreate() {
         Timber.i("onCreate()")
 
+        inputEventDispatcher.keyEventReceiver = this
         var subtypes = florisboard.subtypeManager.subtypes
         if (subtypes.isEmpty()) {
             subtypes = listOf(Subtype.DEFAULT)
@@ -191,8 +207,9 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
     override fun onDestroy() {
         Timber.i("onDestroy()")
 
+        inputEventDispatcher.keyEventReceiver = null
+        inputEventDispatcher.close()
         cancel()
-        osHandler.removeCallbacksAndMessages(null)
         layoutManager.onDestroy()
         instance = null
     }
@@ -292,14 +309,21 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
         keyboardViews[mode]?.requestLayoutAllKeys()
         activeKeyboardMode = mode
         isManualSelectionMode = false
-        isManualSelectionModeLeft = false
-        isManualSelectionModeRight = false
+        isManualSelectionModeStart = false
+        isManualSelectionModeEnd = false
         smartbarView?.isQuickActionsVisible = false
         smartbarView?.updateSmartbarState()
     }
 
     override fun onSubtypeChanged(newSubtype: Subtype) {
         launch {
+            if (activeEditorInstance.isComposingEnabled) {
+                withContext(Dispatchers.IO) {
+                    dictionaryManager.loadDictionary(AssetRef(AssetSource.Assets,"ime/dict/en.flict")).let {
+                        activeDictionary = it.getOrDefault(null)
+                    }
+                }
+            }
             val keyboardView = keyboardViews[KeyboardMode.CHARACTERS]
             keyboardView?.computedLayout = layoutManager.fetchComputedLayoutAsync(KeyboardMode.CHARACTERS, newSubtype, florisboard.prefs).await()
             keyboardView?.updateVisibility()
@@ -311,13 +335,39 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
      * and passing this info on to the [SmartbarView] to turn it into candidate suggestions.
      */
     override fun onUpdateSelection() {
-        if (!activeEditorInstance.isNewSelectionInBoundsOfOld) {
-            isManualSelectionMode = false
-            isManualSelectionModeLeft = false
-            isManualSelectionModeRight = false
+        if (!inputEventDispatcher.isPressed(KeyCode.SHIFT)) {
+            updateCapsState()
         }
-        updateCapsState()
         smartbarView?.updateSmartbarState()
+        if (BuildConfig.DEBUG) {
+            Timber.i("current word: ${activeEditorInstance.cachedInput.currentWord.text}")
+        }
+        if (activeEditorInstance.isComposingEnabled && !inputEventDispatcher.isPressed(KeyCode.DELETE)) {
+            if (activeEditorInstance.shouldReevaluateComposingSuggestions) {
+                activeEditorInstance.shouldReevaluateComposingSuggestions = false
+                activeDictionary?.let {
+                    launch(Dispatchers.Default) {
+                        val startTime = System.nanoTime()
+                        val suggestions = it.getTokenPredictions(
+                            precedingTokens = listOf(),
+                            currentToken = Token(activeEditorInstance.cachedInput.currentWord.text),
+                            maxSuggestionCount = 3,
+                            allowPossiblyOffensive = !florisboard.prefs.suggestion.blockPossiblyOffensive
+                        ).toStringList()
+                        if (BuildConfig.DEBUG) {
+                            val elapsed = (System.nanoTime() - startTime) / 1000.0
+                            Timber.i("sugg fetch time: $elapsed us")
+                        }
+                        withContext(Dispatchers.Main) {
+                            smartbarView?.setCandidateSuggestionWords(startTime, suggestions)
+                            smartbarView?.updateCandidateSuggestionCapsState()
+                        }
+                    }
+                }
+            } else {
+                smartbarView?.setCandidateSuggestionWords(System.nanoTime(), listOf())
+            }
+        }
     }
 
     override fun onPrimaryClipChanged() {
@@ -332,9 +382,7 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
         if (!capsLock) {
             caps = florisboard.prefs.correction.autoCapitalization &&
                     activeEditorInstance.cursorCapsMode != InputAttributes.CapsMode.NONE
-            launch(Dispatchers.Main) {
-                keyboardViews[activeKeyboardMode]?.invalidateAllKeys()
-            }
+            keyboardViews[activeKeyboardMode]?.invalidateAllKeys()
         }
     }
 
@@ -343,20 +391,24 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
      * class.
      */
     fun executeSwipeAction(swipeAction: SwipeAction) {
-        when (swipeAction) {
-            SwipeAction.DELETE_WORD -> handleDeleteWord()
-            SwipeAction.INSERT_SPACE -> handleSpace()
-            SwipeAction.MOVE_CURSOR_DOWN -> handleArrow(KeyCode.ARROW_DOWN)
-            SwipeAction.MOVE_CURSOR_UP -> handleArrow(KeyCode.ARROW_UP)
-            SwipeAction.MOVE_CURSOR_LEFT -> handleArrow(KeyCode.ARROW_LEFT)
-            SwipeAction.MOVE_CURSOR_RIGHT -> handleArrow(KeyCode.ARROW_RIGHT)
-            SwipeAction.MOVE_CURSOR_START_OF_LINE -> handleArrow(KeyCode.MOVE_HOME)
-            SwipeAction.MOVE_CURSOR_END_OF_LINE -> handleArrow(KeyCode.MOVE_END)
-            SwipeAction.SHIFT -> handleShift()
-            SwipeAction.SHOW_INPUT_METHOD_PICKER -> sendKeyPress(
-                KeyData(type = KeyType.FUNCTION, code = KeyCode.SHOW_INPUT_METHOD_PICKER)
-            )
-            else -> {}
+        val keyData = when (swipeAction) {
+            SwipeAction.DELETE_WORD -> KeyData.DELETE_WORD
+            SwipeAction.INSERT_SPACE -> KeyData.SPACE
+            SwipeAction.MOVE_CURSOR_DOWN -> KeyData.ARROW_DOWN
+            SwipeAction.MOVE_CURSOR_UP -> KeyData.ARROW_UP
+            SwipeAction.MOVE_CURSOR_LEFT -> KeyData.ARROW_LEFT
+            SwipeAction.MOVE_CURSOR_RIGHT -> KeyData.ARROW_RIGHT
+            SwipeAction.MOVE_CURSOR_START_OF_LINE -> KeyData.MOVE_START_OF_LINE
+            SwipeAction.MOVE_CURSOR_END_OF_LINE -> KeyData.MOVE_END_OF_LINE
+            SwipeAction.MOVE_CURSOR_START_OF_PAGE -> KeyData.MOVE_START_OF_PAGE
+            SwipeAction.MOVE_CURSOR_END_OF_PAGE -> KeyData.MOVE_END_OF_PAGE
+            SwipeAction.SHIFT -> KeyData.SHIFT
+            SwipeAction.SWITCH_TO_CLIPBOARD_CONTEXT -> KeyData.SWITCH_TO_CLIPBOARD_CONTEXT
+            SwipeAction.SHOW_INPUT_METHOD_PICKER -> KeyData.SHOW_INPUT_METHOD_PICKER
+            else -> null
+        }
+        if (keyData != null) {
+            inputEventDispatcher.send(InputKeyEvent.downUp(keyData))
         }
     }
 
@@ -364,6 +416,10 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
         setActiveKeyboardMode(KeyboardMode.CHARACTERS)
     }
 
+    override fun onSmartbarCandidatePressed(word: String) {
+        activeEditorInstance.commitCompletion(word)
+    }
+
     override fun onSmartbarPrivateModeButtonClicked() {
         Toast.makeText(florisboard.context, R.string.private_mode_dialog__title, Toast.LENGTH_LONG).show()
     }
@@ -381,11 +437,11 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
             R.id.quick_action_open_settings -> florisboard.launchSettings()
             R.id.quick_action_one_handed_toggle -> florisboard.toggleOneHandedMode(isRight = true)
             R.id.quick_action_undo -> {
-                handleUndo()
+                activeEditorInstance.performUndo()
                 return
             }
             R.id.quick_action_redo -> {
-                handleRedo()
+                activeEditorInstance.performRedo()
                 return
             }
         }
@@ -393,23 +449,13 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
         smartbarView?.updateSmartbarState()
     }
 
-    private fun handleUndo(){
-        activeEditorInstance.performUndo()
-    }
-
-    private fun handleRedo(){
-        activeEditorInstance.performRedo()
-    }
-
     /**
      * Handles a [KeyCode.DELETE] event.
      */
     private fun handleDelete() {
-        hasCapsRecentlyChanged = false
-        hasSpaceRecentlyPressed = false
         isManualSelectionMode = false
-        isManualSelectionModeLeft = false
-        isManualSelectionModeRight = false
+        isManualSelectionModeStart = false
+        isManualSelectionModeEnd = false
         activeEditorInstance.deleteBackwards()
     }
 
@@ -417,11 +463,9 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
      * Handles a [KeyCode.DELETE_WORD] event.
      */
     private fun handleDeleteWord() {
-        hasCapsRecentlyChanged = false
-        hasSpaceRecentlyPressed = false
         isManualSelectionMode = false
-        isManualSelectionModeLeft = false
-        isManualSelectionModeRight = false
+        isManualSelectionModeStart = false
+        isManualSelectionModeEnd = false
         activeEditorInstance.deleteWordsBeforeCursor(1)
     }
 
@@ -429,8 +473,6 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
      * Handles a [KeyCode.ENTER] event.
      */
     private fun handleEnter() {
-        hasCapsRecentlyChanged = false
-        hasSpaceRecentlyPressed = false
         if (activeEditorInstance.imeOptions.flagNoEnterAction) {
             activeEditorInstance.performEnter()
         } else {
@@ -461,44 +503,67 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
     }
 
     /**
-     * Handles a [KeyCode.SHIFT] event.
+     * Handles a [KeyCode.SHIFT] down event.
      */
-    private fun handleShift() {
-        if (hasCapsRecentlyChanged) {
-            osHandler.removeCallbacksAndMessages(null)
+    private fun handleShiftDown(ev: InputKeyEvent) {
+        if (ev.isConsecutiveEventOf(inputEventDispatcher.lastKeyEventDown, florisboard.prefs.keyboard.longPressDelay.toLong())) {
+            newCapsState = true
             caps = true
             capsLock = true
-            hasCapsRecentlyChanged = false
         } else {
-            caps = !caps
+            newCapsState = !caps
+            caps = true
             capsLock = false
-            hasCapsRecentlyChanged = true
-            osHandler.postDelayed({
-                hasCapsRecentlyChanged = false
-            }, 300)
         }
         keyboardViews[activeKeyboardMode]?.invalidateAllKeys()
+        smartbarView?.updateCandidateSuggestionCapsState()
+    }
+
+    /**
+     * Handles a [KeyCode.SHIFT] up event.
+     */
+    private fun handleShiftUp() {
+        caps = newCapsState
+        keyboardViews[activeKeyboardMode]?.invalidateAllKeys()
+        smartbarView?.updateCandidateSuggestionCapsState()
+    }
+
+    /**
+     * Handles a [KeyCode.SHIFT] cancel event.
+     */
+    private fun handleShiftCancel() {
+        caps = false
+        capsLock = false
+        keyboardViews[activeKeyboardMode]?.invalidateAllKeys()
+        smartbarView?.updateCandidateSuggestionCapsState()
+    }
+
+    /**
+     * Handles a [KeyCode.SHIFT] up event.
+     */
+    private fun handleShiftLock() {
+        val lastKeyEvent = inputEventDispatcher.lastKeyEventDown ?: return
+        if (lastKeyEvent.data.code == KeyCode.SHIFT && lastKeyEvent.action == InputKeyEvent.Action.DOWN) {
+            newCapsState = true
+            caps = true
+            capsLock = true
+            keyboardViews[activeKeyboardMode]?.invalidateAllKeys()
+            smartbarView?.updateCandidateSuggestionCapsState()
+        }
     }
 
     /**
      * Handles a [KeyCode.SPACE] event. Also handles the auto-correction of two space taps if
      * enabled by the user.
      */
-    private fun handleSpace() {
+    private fun handleSpace(ev: InputKeyEvent) {
         if (florisboard.prefs.correction.doubleSpacePeriod) {
-            if (hasSpaceRecentlyPressed) {
-                osHandler.removeCallbacksAndMessages(null)
+            if (ev.isConsecutiveEventOf(inputEventDispatcher.lastKeyEventUp, florisboard.prefs.keyboard.longPressDelay.toLong())) {
                 val text = activeEditorInstance.getTextBeforeCursor(2)
                 if (text.length == 2 && !text.matches("""[.!?‽\s][\s]""".toRegex())) {
                     activeEditorInstance.deleteBackwards()
                     activeEditorInstance.commitText(".")
                 }
-                hasSpaceRecentlyPressed = false
-            } else {
-                hasSpaceRecentlyPressed = true
-                osHandler.postDelayed({
-                    hasSpaceRecentlyPressed = false
-                }, 300)
             }
         }
         activeEditorInstance.commitText(KeyCode.SPACE.toChar().toString())
@@ -507,114 +572,64 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
     /**
      * Handles [KeyCode] arrow and move events, behaves differently depending on text selection.
      */
-    private fun handleArrow(code: Int) = activeEditorInstance.apply {
-        val selectionStartMin = 0
-        val selectionEndMax = cachedText.length
-        if (selection.isSelectionMode && isManualSelectionMode) {
-            // Text is selected and it is manual selection -> Expand selection depending on started
-            //  direction.
-            when (code) {
-                KeyCode.ARROW_DOWN -> {}
-                KeyCode.ARROW_LEFT -> {
-                    if (isManualSelectionModeLeft) {
-                        setSelection(
-                            (selection.start - 1).coerceAtLeast(selectionStartMin),
-                            selection.end
-                        )
-                    } else {
-                        setSelection(selection.start, selection.end - 1)
-                    }
-                }
-                KeyCode.ARROW_RIGHT -> {
-                    if (isManualSelectionModeRight) {
-                        setSelection(
-                            selection.start,
-                            (selection.end + 1).coerceAtMost(selectionEndMax)
-                        )
-                    } else {
-                        setSelection(selection.start + 1, selection.end)
-                    }
-                }
-                KeyCode.ARROW_UP -> {}
-                KeyCode.MOVE_HOME -> {
-                    if (isManualSelectionModeLeft) {
-                        setSelection(selectionStartMin, selection.end)
-                    } else {
-                        setSelection(selectionStartMin, selection.start)
-                    }
-                }
-                KeyCode.MOVE_END -> {
-                    if (isManualSelectionModeRight) {
-                        setSelection(selection.start, selectionEndMax)
-                    } else {
-                        setSelection(selection.end, selectionEndMax)
-                    }
+    private fun handleArrow(code: Int, count: Int) = activeEditorInstance.apply {
+        val isShiftPressed = isManualSelectionMode || inputEventDispatcher.isPressed(KeyCode.SHIFT)
+        when (code) {
+            KeyCode.ARROW_DOWN -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = false
+                    isManualSelectionModeEnd = true
                 }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_DOWN, meta(shift = isShiftPressed), count)
             }
-        } else if (selection.isSelectionMode && !isManualSelectionMode) {
-            // Text is selected but no manual selection mode -> arrows behave as if selection was
-            //  started in manual left mode
-            when (code) {
-                KeyCode.ARROW_DOWN -> {}
-                KeyCode.ARROW_LEFT -> {
-                    setSelection(selection.start, selection.end - 1)
-                }
-                KeyCode.ARROW_RIGHT -> {
-                    setSelection(
-                        selection.start,
-                        (selection.end + 1).coerceAtMost(selectionEndMax)
-                    )
-                }
-                KeyCode.ARROW_UP -> {}
-                KeyCode.MOVE_HOME -> {
-                    setSelection(selectionStartMin, selection.start)
-                }
-                KeyCode.MOVE_END -> {
-                    setSelection(selection.start, selectionEndMax)
+            KeyCode.ARROW_LEFT -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = true
+                    isManualSelectionModeEnd = false
                 }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_LEFT, meta(shift = isShiftPressed), count)
             }
-        } else if (!selection.isSelectionMode && isManualSelectionMode) {
-            // No text is selected but manual selection mode is active, user wants to start a new
-            //  selection. Must set manual selection direction.
-            when (code) {
-                KeyCode.ARROW_DOWN -> {}
-                KeyCode.ARROW_LEFT -> {
-                    setSelection(
-                        (selection.start - 1).coerceAtLeast(selectionStartMin),
-                        selection.start
-                    )
-                    isManualSelectionModeLeft = true
-                    isManualSelectionModeRight = false
-                }
-                KeyCode.ARROW_RIGHT -> {
-                    setSelection(
-                        selection.end,
-                        (selection.end + 1).coerceAtMost(selectionEndMax)
-                    )
-                    isManualSelectionModeLeft = false
-                    isManualSelectionModeRight = true
-                }
-                KeyCode.ARROW_UP -> {}
-                KeyCode.MOVE_HOME -> {
-                    setSelection(selectionStartMin, selection.start)
-                    isManualSelectionModeLeft = true
-                    isManualSelectionModeRight = false
-                }
-                KeyCode.MOVE_END -> {
-                    setSelection(selection.end, selectionEndMax)
-                    isManualSelectionModeLeft = false
-                    isManualSelectionModeRight = true
+            KeyCode.ARROW_RIGHT -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = false
+                    isManualSelectionModeEnd = true
                 }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_RIGHT, meta(shift = isShiftPressed), count)
             }
-        } else {
-            // No selection and no manual selection mode -> move cursor around
-            when (code) {
-                KeyCode.ARROW_DOWN -> activeEditorInstance.sendSystemKeyEvent(KeyEvent.KEYCODE_DPAD_DOWN)
-                KeyCode.ARROW_LEFT -> activeEditorInstance.sendSystemKeyEvent(KeyEvent.KEYCODE_DPAD_LEFT)
-                KeyCode.ARROW_RIGHT -> activeEditorInstance.sendSystemKeyEvent(KeyEvent.KEYCODE_DPAD_RIGHT)
-                KeyCode.ARROW_UP -> activeEditorInstance.sendSystemKeyEvent(KeyEvent.KEYCODE_DPAD_UP)
-                KeyCode.MOVE_HOME -> activeEditorInstance.sendSystemKeyEventAlt(KeyEvent.KEYCODE_DPAD_UP)
-                KeyCode.MOVE_END -> activeEditorInstance.sendSystemKeyEventAlt(KeyEvent.KEYCODE_DPAD_DOWN)
+            KeyCode.ARROW_UP -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = true
+                    isManualSelectionModeEnd = false
+                }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_UP, meta(shift = isShiftPressed), count)
+            }
+            KeyCode.MOVE_START_OF_PAGE -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = true
+                    isManualSelectionModeEnd = false
+                }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_UP, meta(alt = true, shift = isShiftPressed), count)
+            }
+            KeyCode.MOVE_END_OF_PAGE -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = false
+                    isManualSelectionModeEnd = true
+                }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_DOWN, meta(alt = true, shift = isShiftPressed), count)
+            }
+            KeyCode.MOVE_START_OF_LINE -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = true
+                    isManualSelectionModeEnd = false
+                }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_LEFT, meta(alt = true, shift = isShiftPressed), count)
+            }
+            KeyCode.MOVE_END_OF_LINE -> {
+                if (!selection.isSelectionMode && isManualSelectionMode) {
+                    isManualSelectionModeStart = false
+                    isManualSelectionModeEnd = true
+                }
+                sendDownUpKeyEvent(KeyEvent.KEYCODE_DPAD_RIGHT, meta(alt = true, shift = isShiftPressed), count)
             }
         }
     }
@@ -624,10 +639,10 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
      */
     private fun handleClipboardSelect() = activeEditorInstance.apply {
         if (selection.isSelectionMode) {
-            if (isManualSelectionMode && isManualSelectionModeLeft) {
-                setSelection(selection.start, selection.start)
+            if (isManualSelectionMode && isManualSelectionModeStart) {
+                selection.updateAndNotify(selection.start, selection.start)
             } else {
-                setSelection(selection.end, selection.end)
+                selection.updateAndNotify(selection.end, selection.end)
             }
             isManualSelectionMode = false
         } else {
@@ -638,27 +653,40 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
     }
 
     /**
-     * Handles a [KeyCode.CLIPBOARD_SELECT_ALL] event.
+     * Adjusts a given key data for caps state and returns the correct reference.
      */
-    private fun handleClipboardSelectAll() {
-        activeEditorInstance.setSelection(0, activeEditorInstance.cachedText.length)
+    private fun getAdjustedKeyData(keyData: KeyData): KeyData {
+        return if (caps && keyData is FlorisKeyData && keyData.shift != null) { keyData.shift!! } else { keyData }
     }
 
-    /**
-     * Main logic point for sending a key press. Different actions may occur depending on the given
-     * [KeyData]. This method handles all key press send events, which are text based. For media
-     * input send events see MediaInputManager.
-     *
-     * @param keyData The [KeyData] object which should be sent.
-     */
-    fun sendKeyPress(keyData: KeyData) {
-        when (keyData.code) {
+    override fun onInputKeyDown(ev: InputKeyEvent) {
+        val data = getAdjustedKeyData(ev.data)
+        when (data.code) {
+            KeyCode.INTERNAL_BATCH_EDIT -> {
+                florisboard.beginInternalBatchEdit()
+                return
+            }
+            KeyCode.SHIFT -> {
+                handleShiftDown(ev)
+            }
+        }
+    }
+
+    override fun onInputKeyUp(ev: InputKeyEvent) {
+        val data = getAdjustedKeyData(ev.data)
+        when (data.code) {
             KeyCode.ARROW_DOWN,
             KeyCode.ARROW_LEFT,
             KeyCode.ARROW_RIGHT,
             KeyCode.ARROW_UP,
-            KeyCode.MOVE_HOME,
-            KeyCode.MOVE_END -> handleArrow(keyData.code)
+            KeyCode.MOVE_START_OF_PAGE,
+            KeyCode.MOVE_END_OF_PAGE,
+            KeyCode.MOVE_START_OF_LINE,
+            KeyCode.MOVE_END_OF_LINE -> if (ev.action == InputKeyEvent.Action.DOWN_UP || ev.action == InputKeyEvent.Action.REPEAT) {
+                handleArrow(data.code, ev.count)
+            } else {
+                handleArrow(data.code, 1)
+            }
             KeyCode.CLIPBOARD_CUT -> activeEditorInstance.performClipboardCut()
             KeyCode.CLIPBOARD_COPY -> activeEditorInstance.performClipboardCopy()
             KeyCode.CLIPBOARD_PASTE -> {
@@ -666,25 +694,36 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
                 smartbarView?.resetClipboardSuggestion()
             }
             KeyCode.CLIPBOARD_SELECT -> handleClipboardSelect()
-            KeyCode.CLIPBOARD_SELECT_ALL -> handleClipboardSelectAll()
+            KeyCode.CLIPBOARD_SELECT_ALL -> activeEditorInstance.performClipboardSelectAll()
             KeyCode.DELETE -> {
                 handleDelete()
-                smartbarView?.resetClipboardSuggestion()
+                if (ev.action == InputKeyEvent.Action.DOWN_UP || ev.action == InputKeyEvent.Action.UP) {
+                    smartbarView?.resetClipboardSuggestion()
+                }
+            }
+            KeyCode.DELETE_WORD -> {
+                handleDeleteWord()
+                if (ev.action == InputKeyEvent.Action.DOWN_UP || ev.action == InputKeyEvent.Action.UP) {
+                    smartbarView?.resetClipboardSuggestion()
+                }
             }
             KeyCode.ENTER -> {
                 handleEnter()
                 smartbarView?.resetClipboardSuggestion()
             }
+            KeyCode.INTERNAL_BATCH_EDIT -> {
+                florisboard.endInternalBatchEdit()
+                return
+            }
             KeyCode.LANGUAGE_SWITCH -> handleLanguageSwitch()
             KeyCode.SETTINGS -> florisboard.launchSettings()
-            KeyCode.SHIFT -> handleShift()
-            KeyCode.SHOW_INPUT_METHOD_PICKER -> {
-                val im =
-                    florisboard.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
-                im.showInputMethodPicker()
-            }
+            KeyCode.SHIFT -> handleShiftUp()
+            KeyCode.SHIFT_LOCK -> handleShiftLock()
+            KeyCode.SHOW_INPUT_METHOD_PICKER -> florisboard.imeManager?.showInputMethodPicker()
             KeyCode.SWITCH_TO_MEDIA_CONTEXT -> florisboard.setActiveInput(R.id.media_input)
+            KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT -> florisboard.setActiveInput(R.id.clip_input)
             KeyCode.SWITCH_TO_TEXT_CONTEXT -> florisboard.setActiveInput(R.id.text_input)
+            KeyCode.CLEAR_CLIPBOARD_HISTORY -> florisboard.florisClipboardManager?.clearHistoryWithAnimation()
             KeyCode.TOGGLE_ONE_HANDED_MODE_LEFT -> florisboard.toggleOneHandedMode(isRight = false)
             KeyCode.TOGGLE_ONE_HANDED_MODE_RIGHT -> florisboard.toggleOneHandedMode(isRight = true)
             KeyCode.VIEW_CHARACTERS -> setActiveKeyboardMode(KeyboardMode.CHARACTERS)
@@ -699,49 +738,59 @@ class TextInputManager private constructor() : CoroutineScope by MainScope(),
                     KeyboardMode.NUMERIC,
                     KeyboardMode.NUMERIC_ADVANCED,
                     KeyboardMode.PHONE,
-                    KeyboardMode.PHONE2 -> when (keyData.type) {
+                    KeyboardMode.PHONE2 -> when (data.type) {
                         KeyType.CHARACTER,
                         KeyType.NUMERIC -> {
-                            val text = keyData.code.toChar().toString()
+                            val text = data.code.toChar().toString()
                             activeEditorInstance.commitText(text)
                         }
-                        else -> when (keyData.code) {
+                        else -> when (data.code) {
                             KeyCode.PHONE_PAUSE,
                             KeyCode.PHONE_WAIT -> {
-                                val text = keyData.code.toChar().toString()
+                                val text = data.code.toChar().toString()
                                 activeEditorInstance.commitText(text)
                             }
                         }
                     }
-                    else -> when (keyData.type) {
-                        KeyType.CHARACTER, KeyType.NUMERIC -> when (keyData.code) {
-                            KeyCode.SPACE -> handleSpace()
+                    else -> when (data.type) {
+                        KeyType.CHARACTER, KeyType.NUMERIC -> when (data.code) {
+                            KeyCode.SPACE -> handleSpace(ev)
                             KeyCode.URI_COMPONENT_TLD -> {
-                                val tld = keyData.label.toLowerCase(Locale.ENGLISH)
+                                val tld = data.label.toLowerCase(Locale.ENGLISH)
                                 activeEditorInstance.commitText(tld)
                             }
                             else -> {
-                                hasCapsRecentlyChanged = false
-                                hasSpaceRecentlyPressed = false
-                                var text = keyData.code.toChar().toString()
+                                var text = data.code.toChar().toString()
+                                val locale = if (florisboard.activeSubtype.locale.language == "el") { Locale.getDefault() } else { florisboard.activeSubtype.locale }
                                 text = when (caps && activeKeyboardMode == KeyboardMode.CHARACTERS) {
-                                    true -> text.toUpperCase(florisboard.activeSubtype.locale)
+                                    true -> text.toUpperCase(locale)
                                     false -> text
                                 }
                                 activeEditorInstance.commitText(text)
                             }
                         }
                         else -> {
-                            Timber.e("sendKeyPress(keyData): Received unknown key: $keyData")
+                            Timber.e("sendKeyPress(keyData): Received unknown key: $data")
                         }
                     }
                 }
                 smartbarView?.resetClipboardSuggestion()
             }
         }
-        if (keyData.code != KeyCode.SHIFT && !capsLock) {
+        if (data.code != KeyCode.SHIFT && !capsLock && !inputEventDispatcher.isPressed(KeyCode.SHIFT)) {
             updateCapsState()
         }
         smartbarView?.updateSmartbarState()
     }
+
+    override fun onInputKeyRepeat(ev: InputKeyEvent) {
+        onInputKeyUp(ev)
+    }
+
+    override fun onInputKeyCancel(ev: InputKeyEvent) {
+        val data = getAdjustedKeyData(ev.data)
+        when (data.code) {
+            KeyCode.SHIFT -> handleShiftCancel()
+        }
+    }
 }

app/src/main/java/dev/patrickgold/florisboard/ime/text/editing/EditingKeyView.kt

@@ -30,6 +30,7 @@ import android.widget.Button
 import androidx.appcompat.widget.AppCompatImageButton
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.core.InputKeyEvent
 import dev.patrickgold.florisboard.ime.core.PrefHelper
 import dev.patrickgold.florisboard.ime.text.key.KeyCode
 import dev.patrickgold.florisboard.ime.text.key.KeyData
@@ -46,10 +47,25 @@ class EditingKeyView : AppCompatImageButton, ThemeManager.OnThemeUpdatedListener
     private val florisboard: FlorisBoard? = FlorisBoard.getInstanceOrNull()
     private val prefs: PrefHelper = PrefHelper.getDefaultInstance(context)
     private val themeManager: ThemeManager = ThemeManager.default()
-    private val data: KeyData
+    private val data: KeyData = when (id) {
+        R.id.arrow_down -> KeyData.ARROW_DOWN
+        R.id.arrow_left -> KeyData.ARROW_LEFT
+        R.id.arrow_right -> KeyData.ARROW_RIGHT
+        R.id.arrow_up -> KeyData.ARROW_UP
+        R.id.backspace -> KeyData.DELETE
+        R.id.clipboard_copy -> KeyData.CLIPBOARD_COPY
+        R.id.clipboard_cut -> KeyData.CLIPBOARD_CUT
+        R.id.clipboard_paste -> KeyData.CLIPBOARD_PASTE
+        R.id.move_start_of_line -> KeyData.MOVE_START_OF_LINE
+        R.id.move_end_of_line -> KeyData.MOVE_END_OF_LINE
+        R.id.select -> KeyData.CLIPBOARD_SELECT
+        R.id.select_all -> KeyData.CLIPBOARD_SELECT_ALL
+        else -> KeyData.UNSPECIFIED
+    }
     private var isKeyPressed: Boolean = false
     private val repeatedKeyPressHandler: Handler = Handler(context.mainLooper)
 
+    private val defaultTextSize: Float = Button(context).textSize
     private var label: String? = null
     private var labelPaint: Paint = Paint().apply {
         alpha = 255
@@ -57,7 +73,7 @@ class EditingKeyView : AppCompatImageButton, ThemeManager.OnThemeUpdatedListener
         isAntiAlias = true
         isFakeBoldText = false
         textAlign = Paint.Align.CENTER
-        textSize = Button(context).textSize
+        textSize = defaultTextSize
         typeface = Typeface.DEFAULT
     }
 
@@ -71,22 +87,6 @@ class EditingKeyView : AppCompatImageButton, ThemeManager.OnThemeUpdatedListener
     constructor(context: Context) : this(context, null)
     constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, R.style.TextEditingButton)
     constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
-        val code = when (id) {
-            R.id.arrow_down -> KeyCode.ARROW_DOWN
-            R.id.arrow_left -> KeyCode.ARROW_LEFT
-            R.id.arrow_right -> KeyCode.ARROW_RIGHT
-            R.id.arrow_up -> KeyCode.ARROW_UP
-            R.id.backspace -> KeyCode.DELETE
-            R.id.clipboard_copy -> KeyCode.CLIPBOARD_COPY
-            R.id.clipboard_cut -> KeyCode.CLIPBOARD_CUT
-            R.id.clipboard_paste -> KeyCode.CLIPBOARD_PASTE
-            R.id.move_home -> KeyCode.MOVE_HOME
-            R.id.move_end -> KeyCode.MOVE_END
-            R.id.select -> KeyCode.CLIPBOARD_SELECT
-            R.id.select_all -> KeyCode.CLIPBOARD_SELECT_ALL
-            else -> 0
-        }
-        data = KeyData(code = code)
         context.obtainStyledAttributes(attrs, R.styleable.EditingKeyView).apply {
             label = getString(R.styleable.EditingKeyView_android_text)
             recycle()
@@ -123,7 +123,7 @@ class EditingKeyView : AppCompatImageButton, ThemeManager.OnThemeUpdatedListener
                         val delayMillis = prefs.keyboard.longPressDelay.toLong()
                         repeatedKeyPressHandler.postAtScheduledRate(delayMillis, 25) {
                             if (isKeyPressed) {
-                                florisboard?.textInputManager?.sendKeyPress(data)
+                                florisboard?.textInputManager?.inputEventDispatcher?.send(InputKeyEvent.downUp(data))
                             } else {
                                 repeatedKeyPressHandler.cancelAll()
                             }
@@ -135,7 +135,7 @@ class EditingKeyView : AppCompatImageButton, ThemeManager.OnThemeUpdatedListener
                 isKeyPressed = false
                 repeatedKeyPressHandler.cancelAll()
                 if (event.actionMasked != MotionEvent.ACTION_CANCEL) {
-                    florisboard?.textInputManager?.sendKeyPress(data)
+                    florisboard?.textInputManager?.inputEventDispatcher?.send(InputKeyEvent.downUp(data))
                 }
             }
             else -> return false
@@ -173,8 +173,10 @@ class EditingKeyView : AppCompatImageButton, ThemeManager.OnThemeUpdatedListener
             }
             val isPortrait =
                 resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT
-            if (!isPortrait) {
-                labelPaint.textSize *= 0.9f
+            labelPaint.textSize = if (isPortrait) {
+                defaultTextSize
+            } else {
+                defaultTextSize * 0.9f
             }
             val centerX = measuredWidth / 2.0f
             val centerY = measuredHeight / 2.0f + (labelPaint.textSize - labelPaint.descent()) / 2

app/src/main/java/dev/patrickgold/florisboard/ime/text/editing/EditingKeyboardView.kt

@@ -35,8 +35,6 @@ class EditingKeyboardView : ConstraintLayout, FlorisBoard.EventListener,
     private val florisboard: FlorisBoard? = FlorisBoard.getInstanceOrNull()
     private val themeManager: ThemeManager = ThemeManager.default()
 
-    private var arrowUpKey: EditingKeyView? = null
-    private var arrowDownKey: EditingKeyView? = null
     private var selectKey: EditingKeyView? = null
     private var selectAllKey: EditingKeyView? = null
     private var cutKey: EditingKeyView? = null
@@ -52,8 +50,6 @@ class EditingKeyboardView : ConstraintLayout, FlorisBoard.EventListener,
         florisboard?.addEventListener(this)
         themeManager.registerOnThemeUpdatedListener(this)
 
-        arrowUpKey = findViewById(R.id.arrow_up)
-        arrowDownKey = findViewById(R.id.arrow_down)
         selectKey = findViewById(R.id.select)
         selectAllKey = findViewById(R.id.select_all)
         cutKey = findViewById(R.id.clipboard_cut)
@@ -74,8 +70,6 @@ class EditingKeyboardView : ConstraintLayout, FlorisBoard.EventListener,
     override fun onUpdateSelection() {
         val isSelectionActive = florisboard?.activeEditorInstance?.selection?.isSelectionMode ?: false
         val isSelectionMode = florisboard?.textInputManager?.isManualSelectionMode ?: false
-        arrowUpKey?.isEnabled = !(isSelectionActive || isSelectionMode)
-        arrowDownKey?.isEnabled = !(isSelectionActive || isSelectionMode)
         selectKey?.isHighlighted = isSelectionActive || isSelectionMode
         selectAllKey?.visibility = when {
             isSelectionActive -> View.GONE
@@ -86,7 +80,11 @@ class EditingKeyboardView : ConstraintLayout, FlorisBoard.EventListener,
             else -> View.GONE
         }
         copyKey?.isEnabled = isSelectionActive
-        pasteKey?.isEnabled = florisboard?.clipboardManager?.hasPrimaryClip() ?: false
+        pasteKey?.isEnabled =
+            florisboard?.florisClipboardManager?.hasPrimaryClip() == true &&
+                florisboard.activeEditorInstance.contentMimeTypes?.any {
+                    florisboard.florisClipboardManager!!.primaryClip?.mimeTypes?.contains(it) ?: false
+                } == true
     }
 
     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {

app/src/main/java/dev/patrickgold/florisboard/ime/text/gestures/SwipeAction.kt

@@ -34,10 +34,13 @@ enum class SwipeAction {
     MOVE_CURSOR_RIGHT,
     MOVE_CURSOR_START_OF_LINE,
     MOVE_CURSOR_END_OF_LINE,
+    MOVE_CURSOR_START_OF_PAGE,
+    MOVE_CURSOR_END_OF_PAGE,
     SHIFT,
     SHOW_INPUT_METHOD_PICKER,
     SWITCH_TO_PREV_SUBTYPE,
     SWITCH_TO_NEXT_SUBTYPE,
+    SWITCH_TO_CLIPBOARD_CONTEXT,
     SWITCH_TO_PREV_KEYBOARD;
 
     companion object {

app/src/main/java/dev/patrickgold/florisboard/ime/text/gestures/SwipeGesture.kt

@@ -19,8 +19,9 @@ package dev.patrickgold.florisboard.ime.text.gestures
 import android.content.Context
 import android.view.MotionEvent
 import dev.patrickgold.florisboard.R
-import java.lang.Exception
-import kotlin.math.*
+import kotlin.math.PI
+import kotlin.math.abs
+import kotlin.math.atan
 
 /**
  * Wrapper class which holds all enums, interfaces and classes for detecting a swipe gesture.
@@ -63,10 +64,7 @@ abstract class SwipeGesture {
      * @property listener The listener to report detected swipes to.
      */
     class Detector(private val context: Context, private val listener: Listener) {
-        private var firstMotionEvent: MotionEvent? = null
-        private var lastMotionEvent: MotionEvent? = null
-        private var absUnitCountX: Int = 0
-        private var absUnitCountY: Int = 0
+        private var pointerDataMap: MutableMap<Int, PointerData> = mutableMapOf()
         private var thresholdWidth: Double = numericValue(context, DistanceThreshold.NORMAL)
         private var unitWidth: Double = thresholdWidth / 4.0
 
@@ -91,67 +89,83 @@ abstract class SwipeGesture {
                 when (event.actionMasked) {
                     MotionEvent.ACTION_DOWN,
                     MotionEvent.ACTION_POINTER_DOWN -> {
-                        resetState()
-                        firstMotionEvent = MotionEvent.obtainNoHistory(event)
-                        lastMotionEvent = firstMotionEvent
+                        if (event.actionMasked == MotionEvent.ACTION_DOWN) {
+                            resetState()
+                        }
+                        val pointerIndex = event.actionIndex
+                        val pointerId = event.getPointerId(pointerIndex)
+                        pointerDataMap[pointerId] = PointerData().apply {
+                            firstX = event.getX(pointerIndex)
+                            firstY = event.getY(pointerIndex)
+                            lastX = firstX
+                            lastY = firstY
+                        }
                     }
                     MotionEvent.ACTION_MOVE -> {
-                        val firstEvent = firstMotionEvent ?: return false
-                        val absDiffX = event.x - firstEvent.x
-                        val absDiffY = event.y - firstEvent.y
-                        val lastEvent = lastMotionEvent ?: return false
-                        val relDiffX = event.x - lastEvent.x
-                        val relDiffY = event.y - lastEvent.y
-                        return if (alwaysTriggerOnMove || abs(relDiffX) > (thresholdWidth / 2.0) || abs(relDiffY) > (thresholdWidth / 2.0)) {
-                            lastMotionEvent = MotionEvent.obtainNoHistory(event)
-                            val direction = detectDirection(relDiffX.toDouble(), relDiffY.toDouble())
-                            val newAbsUnitCountX = (absDiffX / unitWidth).toInt()
-                            val newAbsUnitCountY = (absDiffY / unitWidth).toInt()
-                            val relUnitCountX = newAbsUnitCountX - absUnitCountX
-                            val relUnitCountY = newAbsUnitCountY - absUnitCountY
-                            absUnitCountX = newAbsUnitCountX
-                            absUnitCountY = newAbsUnitCountY
-                            listener.onSwipe(Event(
-                                direction = direction,
-                                type = Type.TOUCH_MOVE,
-                                absUnitCountX,
-                                absUnitCountY,
-                                relUnitCountX,
-                                relUnitCountY
-                            ))
-                        } else {
-                            false
+                        for (pointerIndex in 0 until event.pointerCount) {
+                            val pointerId = event.getPointerId(pointerIndex)
+                            pointerDataMap[pointerId]?.apply {
+                                val absDiffX = event.getX(pointerIndex) - firstX
+                                val absDiffY = event.getY(pointerIndex) - firstY
+                                val relDiffX = event.getX(pointerIndex) - lastX
+                                val relDiffY = event.getY(pointerIndex) - lastY
+                                return if (alwaysTriggerOnMove || abs(relDiffX) > (thresholdWidth / 2.0) || abs(relDiffY) > (thresholdWidth / 2.0)) {
+                                    lastX = event.getX(pointerIndex)
+                                    lastY = event.getY(pointerIndex)
+                                    val direction = detectDirection(relDiffX.toDouble(), relDiffY.toDouble())
+                                    val newAbsUnitCountX = (absDiffX / unitWidth).toInt()
+                                    val newAbsUnitCountY = (absDiffY / unitWidth).toInt()
+                                    val relUnitCountX = newAbsUnitCountX - absUnitCountX
+                                    val relUnitCountY = newAbsUnitCountY - absUnitCountY
+                                    absUnitCountX = newAbsUnitCountX
+                                    absUnitCountY = newAbsUnitCountY
+                                    listener.onSwipe(Event(
+                                        direction = direction,
+                                        type = Type.TOUCH_MOVE,
+                                        pointerId,
+                                        absUnitCountX,
+                                        absUnitCountY,
+                                        relUnitCountX,
+                                        relUnitCountY
+                                    ))
+                                } else {
+                                    false
+                                }
+                            }
                         }
                     }
                     MotionEvent.ACTION_UP,
                     MotionEvent.ACTION_POINTER_UP -> {
-                        val firstEvent = firstMotionEvent ?: return false
-                        val absDiffX = event.x - firstEvent.x
-                        val absDiffY = event.y - firstEvent.y
-                        /*val velocityThresholdNV = numericValue(velocityThreshold)
-                        val velocity =
-                            ((convertPixelsToDp(
-                                sqrt(diffX.pow(2) + diffY.pow(2)),
-                                context
-                            ) / event.downTime) * 10.0f.pow(8)).toInt()*/
-                        // return if ((abs(diffX) > distanceThresholdNV || abs(diffY) > distanceThresholdNV) && velocity >= velocityThresholdNV) {
-                        val ret = if ((abs(absDiffX) > thresholdWidth || abs(absDiffY) > thresholdWidth)) {
-                            val direction = detectDirection(absDiffX.toDouble(), absDiffY.toDouble())
-                            absUnitCountX = (absDiffX / unitWidth).toInt()
-                            absUnitCountY = (absDiffY / unitWidth).toInt()
-                            listener.onSwipe(Event(
-                                direction = direction,
-                                type = Type.TOUCH_UP,
-                                absUnitCountX,
-                                absUnitCountY,
-                                absUnitCountX,
-                                absUnitCountY
-                            ))
-                        } else {
-                            false
+                        val pointerIndex = event.actionIndex
+                        val pointerId = event.getPointerId(pointerIndex)
+                        pointerDataMap.remove(pointerId)?.apply {
+                            val absDiffX = event.getX(pointerIndex) - firstX
+                            val absDiffY = event.getY(pointerIndex) - firstY
+                            /*val velocityThresholdNV = numericValue(velocityThreshold)
+                            val velocity =
+                                ((convertPixelsToDp(
+                                    sqrt(diffX.pow(2) + diffY.pow(2)),
+                                    context
+                                ) / event.downTime) * 10.0f.pow(8)).toInt()*/
+                            // return if ((abs(diffX) > distanceThresholdNV || abs(diffY) > distanceThresholdNV) && velocity >= velocityThresholdNV) {
+                            return if ((abs(absDiffX) > thresholdWidth || abs(absDiffY) > thresholdWidth)) {
+                                val direction = detectDirection(absDiffX.toDouble(), absDiffY.toDouble())
+                                absUnitCountX = (absDiffX / unitWidth).toInt()
+                                absUnitCountY = (absDiffY / unitWidth).toInt()
+                                listener.onSwipe(Event(
+                                    direction = direction,
+                                    type = Type.TOUCH_UP,
+                                    pointerId,
+                                    absUnitCountX,
+                                    absUnitCountY,
+                                    absUnitCountX,
+                                    absUnitCountY
+                                ))
+                            } else {
+                                false
+                            }
                         }
-                        resetState()
-                        return ret
+                        return false
                     }
                     MotionEvent.ACTION_CANCEL -> {
                         resetState()
@@ -159,7 +173,7 @@ abstract class SwipeGesture {
                     else -> return false
                 }
                 return false
-            } catch(e: Exception) {
+            } catch (e: Exception) {
                 return false
             }
         }
@@ -207,10 +221,16 @@ abstract class SwipeGesture {
          * Resets the state.
          */
         private fun resetState() {
-            firstMotionEvent = null
-            lastMotionEvent = null
-            absUnitCountX = 0
-            absUnitCountY = 0
+            pointerDataMap.clear()
+        }
+
+        class PointerData {
+            var firstX: Float = 0.0f
+            var firstY: Float = 0.0f
+            var lastX: Float = 0.0f
+            var lastY: Float = 0.0f
+            var absUnitCountX: Int = 0
+            var absUnitCountY: Int = 0
         }
     }
 
@@ -218,7 +238,7 @@ abstract class SwipeGesture {
      * An interface which provides an abstract callback function, which will be called for any
      * detected swipe event.
      */
-    fun interface Listener {
+    interface Listener {
         fun onSwipe(event: Event): Boolean
     }
 
@@ -230,6 +250,8 @@ abstract class SwipeGesture {
         val direction: Direction,
         /** The type of the swipe. */
         val type: Type,
+        /** The pointer ID of this event, corresponds to the value reported by the original MotionEvent. */
+        val pointerId: Int,
         /** The unit count on the x-axis, measured from the first event (ACTION_DOWN). */
         val absUnitCountX: Int,
         /** The unit count on the y-axis, measured from the first event (ACTION_DOWN). */

app/src/main/java/dev/patrickgold/florisboard/ime/text/key/KeyCode.kt

@@ -40,15 +40,17 @@ object KeyCode {
     const val ARROW_RIGHT =                  -21
     const val ARROW_UP =                     -22
     const val ARROW_DOWN =                   -23
-    const val MOVE_HOME =                    -24
-    const val MOVE_END =                     -25
+    const val MOVE_START_OF_PAGE =           -24
+    const val MOVE_END_OF_PAGE =             -25
+    const val MOVE_START_OF_LINE =           -26
+    const val MOVE_END_OF_LINE =             -27
 
     const val SETTINGS =                    -100
     const val CANCEL =                        -3
     const val CLEAR_INPUT =                  -13
     const val VOICE_INPUT =                   -4
 
-    const val DISABLED =                       0
+    const val UNSPECIFIED =                    0
 
     const val SPLIT_LAYOUT =                -110
     const val MERGE_LAYOUT =                -111
@@ -63,9 +65,10 @@ object KeyCode {
     const val CLIPBOARD_PASTE_POPUP =       -133
     const val CLIPBOARD_SELECT =            -134
     const val CLIPBOARD_SELECT_ALL =        -135
+    const val CLEAR_CLIPBOARD_HISTORY =     -136
 
-    const val UNDO =                        -136
-    const val REDO =                        -137
+    const val UNDO =                        -137
+    const val REDO =                        -138
 
     const val PHONE_PAUSE =                   44
     const val PHONE_WAIT =                    59
@@ -87,6 +90,8 @@ object KeyCode {
     const val TOGGLE_ONE_HANDED_MODE_RIGHT =-216
     const val URI_COMPONENT_TLD =           -255
 
+    const val INTERNAL_BATCH_EDIT =         -901
+
     const val KESHIDA =                     1600
     const val HALF_SPACE =                  8204
 }

app/src/main/java/dev/patrickgold/florisboard/ime/text/key/KeyData.kt

@@ -17,6 +17,7 @@
 package dev.patrickgold.florisboard.ime.text.key
 
 import dev.patrickgold.florisboard.ime.popup.PopupSet
+import dev.patrickgold.florisboard.ime.text.key.FlorisKeyData.Companion.GROUP_DEFAULT
 
 /**
  * Data class which describes a single key and its attributes.
@@ -33,7 +34,173 @@ open class KeyData(
     var type: KeyType = KeyType.CHARACTER,
     var code: Int = 0,
     var label: String = ""
-)
+) {
+    companion object {
+        /** Predefined key data for [KeyCode.ARROW_DOWN] */
+        val ARROW_DOWN = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.ARROW_DOWN,
+            label = "arrow_down"
+        )
+
+        /** Predefined key data for [KeyCode.ARROW_LEFT] */
+        val ARROW_LEFT = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.ARROW_LEFT,
+            label = "arrow_left"
+        )
+
+        /** Predefined key data for [KeyCode.ARROW_RIGHT] */
+        val ARROW_RIGHT = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.ARROW_RIGHT,
+            label = "arrow_right"
+        )
+
+        /** Predefined key data for [KeyCode.ARROW_UP] */
+        val ARROW_UP = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.ARROW_UP,
+            label = "arrow_up"
+        )
+
+        /** Predefined key data for [KeyCode.CLIPBOARD_COPY] */
+        val CLIPBOARD_COPY = KeyData(
+            type = KeyType.SYSTEM_GUI,
+            code = KeyCode.CLIPBOARD_COPY,
+            label = "clipboard_copy"
+        )
+
+        /** Predefined key data for [KeyCode.CLIPBOARD_CUT] */
+        val CLIPBOARD_CUT = KeyData(
+            type = KeyType.SYSTEM_GUI,
+            code = KeyCode.CLIPBOARD_CUT,
+            label = "clipboard_cut"
+        )
+
+        /** Predefined key data for [KeyCode.CLIPBOARD_PASTE] */
+        val CLIPBOARD_PASTE = KeyData(
+            type = KeyType.SYSTEM_GUI,
+            code = KeyCode.CLIPBOARD_PASTE,
+            label = "clipboard_paste"
+        )
+
+        /** Predefined key data for [KeyCode.CLIPBOARD_SELECT] */
+        val CLIPBOARD_SELECT = KeyData(
+            type = KeyType.SYSTEM_GUI,
+            code = KeyCode.CLIPBOARD_SELECT,
+            label = "clipboard_select"
+        )
+
+        /** Predefined key data for [KeyCode.CLIPBOARD_SELECT_ALL] */
+        val CLIPBOARD_SELECT_ALL = KeyData(
+            type = KeyType.SYSTEM_GUI,
+            code = KeyCode.CLIPBOARD_SELECT_ALL,
+            label = "clipboard_select_all"
+        )
+
+        /** Predefined key data for [KeyCode.DELETE] */
+        val DELETE = KeyData(
+            type = KeyType.ENTER_EDITING,
+            code = KeyCode.DELETE,
+            label = "delete"
+        )
+
+        /** Predefined key data for [KeyCode.DELETE_WORD] */
+        val DELETE_WORD = KeyData(
+            type = KeyType.ENTER_EDITING,
+            code = KeyCode.DELETE_WORD,
+            label = "delete_word"
+        )
+
+        /** Predefined key data for [KeyCode.INTERNAL_BATCH_EDIT] */
+        val INTERNAL_BATCH_EDIT = KeyData(
+            type = KeyType.FUNCTION,
+            code = KeyCode.INTERNAL_BATCH_EDIT,
+            label = "internal_batch_edit"
+        )
+
+        /** Predefined key data for [KeyCode.MOVE_START_OF_LINE] */
+        val MOVE_START_OF_LINE = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.MOVE_START_OF_LINE,
+            label = "move_start_of_line"
+        )
+
+        /** Predefined key data for [KeyCode.MOVE_END_OF_LINE] */
+        val MOVE_END_OF_LINE = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.MOVE_END_OF_LINE,
+            label = "move_end_of_line"
+        )
+
+        /** Predefined key data for [KeyCode.MOVE_START_OF_PAGE] */
+        val MOVE_START_OF_PAGE = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.MOVE_START_OF_PAGE,
+            label = "move_start_of_page"
+        )
+
+        /** Predefined key data for [KeyCode.MOVE_END_OF_PAGE] */
+        val MOVE_END_OF_PAGE = KeyData(
+            type = KeyType.NAVIGATION,
+            code = KeyCode.MOVE_END_OF_PAGE,
+            label = "move_end_of_page"
+        )
+
+        /** Predefined key data for [KeyCode.SHOW_INPUT_METHOD_PICKER] */
+        val SHOW_INPUT_METHOD_PICKER = KeyData(
+            type = KeyType.FUNCTION,
+            code = KeyCode.SHOW_INPUT_METHOD_PICKER,
+            label = "show_input_method_picker"
+        )
+
+        /** Predefined key data for [KeyCode.SWITCH_TO_TEXT_CONTEXT] */
+        val SWITCH_TO_TEXT_CONTEXT = KeyData(
+            type = KeyType.SYSTEM_GUI,
+            code = KeyCode.SWITCH_TO_TEXT_CONTEXT,
+            label = "switch_to_text_context"
+        )
+        /** Predefined key data for [KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT] */
+        val SWITCH_TO_CLIPBOARD_CONTEXT = KeyData(
+            type = KeyType.SYSTEM_GUI,
+            code = KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT,
+            label = "switch_to_clipboard_context"
+        )
+
+        /** Predefined key data for [KeyCode.SHIFT] */
+        val SHIFT = KeyData(
+            type = KeyType.MODIFIER,
+            code = KeyCode.SHIFT,
+            label = "shift"
+        )
+
+        /** Predefined key data for [KeyCode.SHIFT_LOCK] */
+        val SHIFT_LOCK = KeyData(
+            type = KeyType.MODIFIER,
+            code = KeyCode.SHIFT_LOCK,
+            label = "shift_lock"
+        )
+
+        /** Predefined key data for [KeyCode.SPACE] */
+        val SPACE = KeyData(
+            type = KeyType.CHARACTER,
+            code = KeyCode.SPACE,
+            label = "space"
+        )
+
+        /** Predefined key data for [KeyCode.UNSPECIFIED] */
+        val UNSPECIFIED = KeyData(
+            type = KeyType.UNSPECIFIED,
+            code = KeyCode.UNSPECIFIED,
+            label = "unspecified"
+        )
+    }
+
+    override fun toString(): String {
+        return "KeyData { type=$type code=$code label=\"$label\" }"
+    }
+}
 
 /**
  * Data class which describes a single key and its attributes, while also providing additional
@@ -46,6 +213,10 @@ open class KeyData(
  *  or if the key should always be visible. Defaults to [KeyVariation.ALL].
  * @property popup List of keys which will be accessible while long pressing the key. Defaults to
  *  an empty set (no extended popup).
+ * @property shift An alternative key to use when the keyboard caps state is true. Useful for layouts
+ *  such as Colemak and Dvorak. Defaults to null (don't override base uppercase key). This override
+ *  property should only be used to provide an uppercase variant of two else not related variants, but
+ *  should not be used for providing an uppercase letter (e.g. 'a' -> 'A').
  */
 class FlorisKeyData(
     type: KeyType = KeyType.CHARACTER,
@@ -53,7 +224,8 @@ class FlorisKeyData(
     label: String = "",
     var groupId: Int = GROUP_DEFAULT,
     var variation: KeyVariation = KeyVariation.ALL,
-    var popup: PopupSet<KeyData> = PopupSet()
+    var popup: PopupSet<KeyData> = PopupSet(),
+    var shift: KeyData? = null
 ) : KeyData(type, code, label) {
     companion object {
         /**

app/src/main/java/dev/patrickgold/florisboard/ime/text/key/KeyType.kt

@@ -16,7 +16,6 @@
 
 package dev.patrickgold.florisboard.ime.text.key
 
-import android.annotation.SuppressLint
 import com.squareup.moshi.FromJson
 import java.util.*
 

app/src/main/java/dev/patrickgold/florisboard/ime/text/key/KeyView.kt

@@ -18,9 +18,14 @@ package dev.patrickgold.florisboard.ime.text.key
 
 import android.annotation.SuppressLint
 import android.content.res.Configuration
-import android.graphics.*
+import android.graphics.Canvas
+import android.graphics.Outline
+import android.graphics.Paint
+import android.graphics.Rect
+import android.graphics.Typeface
 import android.graphics.drawable.Drawable
 import android.graphics.drawable.PaintDrawable
+import android.opengl.Visibility
 import android.os.Handler
 import android.view.MotionEvent
 import android.view.View
@@ -30,10 +35,13 @@ import androidx.core.content.ContextCompat.getDrawable
 import androidx.core.view.children
 import com.google.android.flexbox.FlexboxLayout
 import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.clip.FlorisClipboardManager
 import dev.patrickgold.florisboard.ime.core.FlorisBoard
 import dev.patrickgold.florisboard.ime.core.ImeOptions
+import dev.patrickgold.florisboard.ime.core.InputKeyEvent
 import dev.patrickgold.florisboard.ime.core.PrefHelper
 import dev.patrickgold.florisboard.ime.core.Subtype
+import dev.patrickgold.florisboard.ime.popup.PopupManager
 import dev.patrickgold.florisboard.ime.text.gestures.SwipeAction
 import dev.patrickgold.florisboard.ime.text.gestures.SwipeGesture
 import dev.patrickgold.florisboard.ime.text.keyboard.KeyboardMode
@@ -41,7 +49,10 @@ import dev.patrickgold.florisboard.ime.text.keyboard.KeyboardView
 import dev.patrickgold.florisboard.ime.theme.Theme
 import dev.patrickgold.florisboard.ime.theme.ThemeManager
 import dev.patrickgold.florisboard.ime.theme.ThemeValue
-import dev.patrickgold.florisboard.util.*
+import dev.patrickgold.florisboard.util.ViewLayoutUtils
+import dev.patrickgold.florisboard.util.cancelAll
+import dev.patrickgold.florisboard.util.postDelayed
+import timber.log.Timber
 import java.util.*
 import kotlin.math.abs
 
@@ -69,7 +80,7 @@ class KeyView(
     private var hasTriggeredGestureMove: Boolean = false
     private var keyHintMode: KeyHintMode = KeyHintMode.DISABLED
     private val longKeyPressHandler: Handler = Handler(context.mainLooper)
-    private val repeatedKeyPressHandler: Handler = Handler(context.mainLooper)
+    val popupManager = PopupManager<KeyboardView, KeyView>(keyboardView, florisboard?.popupLayerView)
     private val prefs: PrefHelper = PrefHelper.getDefaultInstance(context)
     private var shouldBlockNextKeyCode: Boolean = false
 
@@ -112,11 +123,22 @@ class KeyView(
         layoutParams = FlexboxLayout.LayoutParams(
             FlexboxLayout.LayoutParams.WRAP_CONTENT, FlexboxLayout.LayoutParams.WRAP_CONTENT
         ).apply {
+            val keyMarginH: Int
+            val keyMarginV: Int
+
+            if (keyboardView.isSmartbarKeyboardView) {
+                keyMarginH = resources.getDimension(R.dimen.key_marginH).toInt()
+                keyMarginV = resources.getDimension(R.dimen.key_marginV).toInt()
+            } else {
+                keyMarginV = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingVertical, context).toInt()
+                keyMarginH = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingHorizontal, context).toInt()
+            }
+
             setMargins(
-                resources.getDimension((R.dimen.key_marginH)).toInt(),
-                resources.getDimension(R.dimen.key_marginV).toInt(),
-                resources.getDimension((R.dimen.key_marginH)).toInt(),
-                resources.getDimension(R.dimen.key_marginV).toInt()
+                keyMarginH,
+                keyMarginV,
+                keyMarginH,
+                keyMarginV
             )
             flexShrink = when (keyboardView.computedLayout?.mode) {
                 KeyboardMode.NUMERIC,
@@ -150,7 +172,7 @@ class KeyView(
         setPadding(0, 0, 0, 0)
 
         background = backgroundDrawable
-        elevation = if(themeValueCache.shouldShowBorder) 4.0f else 0.0f
+        elevation = if (themeValueCache.shouldShowBorder) 4.0f else 0.0f
 
         if (prefs.keyboard.hintedNumberRowMode != KeyHintMode.DISABLED && data.popup.hint?.type == KeyType.NUMERIC) {
             keyHintMode = prefs.keyboard.hintedNumberRowMode
@@ -175,17 +197,23 @@ class KeyView(
      */
     fun getComputedLetter(
         keyData: KeyData = data,
-        caps: Boolean = florisboard?.textInputManager?.caps ?: false && florisboard?.textInputManager?.getActiveKeyboardMode() == KeyboardMode.CHARACTERS,
+        caps: Boolean = florisboard?.textInputManager?.caps ?: false &&
+            florisboard?.textInputManager?.getActiveKeyboardMode() == KeyboardMode.CHARACTERS,
         subtype: Subtype = florisboard?.activeSubtype ?: Subtype.DEFAULT
     ): String {
-        return when (data.code) {
-            KeyCode.URI_COMPONENT_TLD -> keyData.label.toLowerCase(Locale.ENGLISH)
-            else -> {
-                val labelText = (keyData.code.toChar()).toString()
-                if (caps) {
-                    labelText.toUpperCase(subtype.locale)
-                } else {
-                    labelText
+        return if (caps && keyData is FlorisKeyData && keyData.shift != null) {
+            (keyData.shift!!.code.toChar()).toString()
+        } else {
+            when (data.code) {
+                KeyCode.URI_COMPONENT_TLD -> keyData.label.toLowerCase(Locale.ENGLISH)
+                else -> {
+                    val labelText = (keyData.code.toChar()).toString()
+                    val locale = if (subtype.locale.language == "el") { Locale.getDefault() } else { subtype.locale }
+                    if (caps) {
+                        labelText.toUpperCase(locale)
+                    } else {
+                        labelText
+                    }
                 }
             }
         }
@@ -217,79 +245,80 @@ class KeyView(
      */
     fun onFlorisTouchEvent(event: MotionEvent?): Boolean {
         if (event == null || !isEnabled) return false
+        val florisboard = florisboard ?: return false
+
+        val pointerIndex = event.actionIndex
+        val pointerId = event.getPointerId(pointerIndex)
+
         val alwaysTriggerOnMove = (hasTriggeredGestureMove
-                && florisboard?.activeEditorInstance?.isRawInputEditor == false
-                && (data.code == KeyCode.DELETE && prefs.gestures.deleteKeySwipeLeft == SwipeAction.DELETE_CHARACTERS_PRECISELY
-                || data.code == KeyCode.SPACE))
+            && (data.code == KeyCode.DELETE && prefs.gestures.deleteKeySwipeLeft == SwipeAction.DELETE_CHARACTERS_PRECISELY
+            || data.code == KeyCode.SPACE))
         if (swipeGestureDetector.onTouchEvent(event, alwaysTriggerOnMove)) {
             isKeyPressed = false
+            if (florisboard.textInputManager.inputEventDispatcher.isPressed(data.code)) {
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.cancel(data))
+            }
             longKeyPressHandler.cancelAll()
-            repeatedKeyPressHandler.cancelAll()
-            keyboardView.popupManager.hide()
+            popupManager.hide()
             return true
         }
+
         when (event.actionMasked) {
             MotionEvent.ACTION_DOWN -> {
-                if (data.code == KeyCode.SHIFT) {
-                    isKeyPressed = true
-                    florisboard?.keyPressVibrate()
-                    florisboard?.keyPressSound(data)
-                    florisboard?.textInputManager?.sendKeyPress(data)
-                } else {
-                    val delayMillis = prefs.keyboard.longPressDelay.toLong()
-                    hasTriggeredGestureMove = false
-                    shouldBlockNextKeyCode = false
-                    florisboard?.prefs?.keyboard?.let {
-                        if (it.popupEnabled){
-                            keyboardView.popupManager.show(this, keyHintMode)
-                        }
-                    }
-                    isKeyPressed = true
-                    florisboard?.keyPressVibrate()
-                    florisboard?.keyPressSound(data)
-                    when (data.code) {
-                        KeyCode.ARROW_DOWN,
-                        KeyCode.ARROW_LEFT,
-                        KeyCode.ARROW_RIGHT,
-                        KeyCode.ARROW_UP,
-                        KeyCode.DELETE -> {
-                            repeatedKeyPressHandler.postAtScheduledRate((delayMillis * 2.0f).toLong(), 25) {
-                                if (isKeyPressed) {
-                                    florisboard?.textInputManager?.sendKeyPress(data)
-                                } else {
-                                    repeatedKeyPressHandler.cancelAll()
-                                }
-                            }
-                        }
-                    }
-                    if (data.code == KeyCode.SPACE) {
-                        initSelectionStart = florisboard?.activeEditorInstance?.selection?.start ?: 0
-                        initSelectionEnd = florisboard?.activeEditorInstance?.selection?.end ?: 0
+                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.down(data))
+                isKeyPressed = true
+                val delayMillis = prefs.keyboard.longPressDelay.toLong()
+                hasTriggeredGestureMove = false
+                shouldBlockNextKeyCode = false
+                if (florisboard.prefs.keyboard.popupEnabled) {
+                    popupManager.show(this, keyHintMode)
+                }
+                isKeyPressed = true
+                florisboard.keyPressVibrate()
+                florisboard.keyPressSound(data)
+
+                when (data.code) {
+                    KeyCode.SPACE -> {
+                        initSelectionStart = florisboard.activeEditorInstance.selection.start
+                        initSelectionEnd = florisboard.activeEditorInstance.selection.end
                         longKeyPressHandler.postDelayed((delayMillis * 2.5f).toLong()) {
                             when (prefs.gestures.spaceBarLongPress) {
                                 SwipeAction.NO_ACTION,
-                                SwipeAction.INSERT_SPACE -> {}
+                                SwipeAction.INSERT_SPACE -> {
+                                }
                                 else -> {
-                                    florisboard?.executeSwipeAction(prefs.gestures.spaceBarLongPress)
+                                    this.florisboard.executeSwipeAction(prefs.gestures.spaceBarLongPress)
                                     shouldBlockNextKeyCode = true
                                 }
                             }
                         }
-                    } else {
+                    }
+                    KeyCode.SHIFT -> {
+                        longKeyPressHandler.postDelayed((delayMillis * 2.5).toLong()) {
+                            this.florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.downUp(KeyData.SHIFT_LOCK))
+                        }
+                    }
+                    KeyCode.LANGUAGE_SWITCH -> {
+                        longKeyPressHandler.postDelayed((delayMillis * 2.0).toLong()) {
+                            shouldBlockNextKeyCode = true
+                            this.florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.downUp(KeyData.SHOW_INPUT_METHOD_PICKER))
+                        }
+                    }
+                    else -> {
                         longKeyPressHandler.postDelayed(delayMillis) {
                             if (data.popup.isNotEmpty()) {
-                                keyboardView.popupManager.extend(this, keyHintMode)
+                                popupManager.extend(this@KeyView, keyHintMode)
                             }
                         }
                     }
                 }
             }
             MotionEvent.ACTION_MOVE -> {
-                if (keyboardView.popupManager.isShowingExtendedPopup) {
+                if (popupManager.isShowingExtendedPopup) {
                     val isPointerWithinBounds =
-                        keyboardView.popupManager.propagateMotionEvent(this, event)
+                        popupManager.propagateMotionEvent(this, event)
                     if (!isPointerWithinBounds && !shouldBlockNextKeyCode) {
-                        keyboardView.dismissActiveKeyViewReference()
+                        keyboardView.dismissActiveKeyViewReference(pointerId)
                     }
                 } else {
                     val parent = parent as ViewGroup
@@ -299,31 +328,49 @@ class KeyView(
                         || event.y > 1.35f * measuredHeight
                     ) {
                         if (!shouldBlockNextKeyCode) {
-                            keyboardView.dismissActiveKeyViewReference()
+                            keyboardView.dismissActiveKeyViewReference(pointerId)
                         }
                     }
                 }
             }
-            MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
+            MotionEvent.ACTION_UP -> {
                 longKeyPressHandler.cancelAll()
-                repeatedKeyPressHandler.cancelAll()
-                if (data.code != KeyCode.SHIFT) {
-                    if (hasTriggeredGestureMove && data.code == KeyCode.DELETE) {
-                        florisboard?.activeEditorInstance?.apply {
-                            if (selection.isSelectionMode) {
-                                deleteBackwards()
+                if (hasTriggeredGestureMove && data.code == KeyCode.DELETE) {
+                    florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.cancel(data))
+                    florisboard.activeEditorInstance.apply {
+                        if (selection.isSelectionMode) {
+                            deleteBackwards()
+                        }
+                    }
+                } else {
+                    val retData = popupManager.getActiveKeyData(this)
+                    if (!shouldBlockNextKeyCode && retData != null) {
+                        if (retData == data) {
+                            florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.up(data))
+                        } else {
+                            if (florisboard.textInputManager.inputEventDispatcher.isPressed(data.code)) {
+                                florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.cancel(data))
                             }
+                            florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.downUp(retData))
                         }
                     } else {
-                        val retData = keyboardView.popupManager.getActiveKeyData(this)
-                        if (event.actionMasked != MotionEvent.ACTION_CANCEL && !shouldBlockNextKeyCode && retData != null) {
-                            florisboard?.textInputManager?.sendKeyPress(retData)
-                        } else {
-                            shouldBlockNextKeyCode = false
+                        if (florisboard.textInputManager.inputEventDispatcher.isPressed(data.code)) {
+                            florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.cancel(data))
                         }
-                        keyboardView.popupManager.hide()
                     }
+                    popupManager.hide()
                 }
+                shouldBlockNextKeyCode = false
+                hasTriggeredGestureMove = false
+                isKeyPressed = false
+            }
+            MotionEvent.ACTION_CANCEL -> {
+                longKeyPressHandler.cancelAll()
+                if (data.code != KeyCode.SHIFT) {
+                    florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.cancel(data))
+                }
+                popupManager.hide()
+                shouldBlockNextKeyCode = false
                 hasTriggeredGestureMove = false
                 isKeyPressed = false
             }
@@ -343,8 +390,8 @@ class KeyView(
                 SwipeGesture.Type.TOUCH_MOVE -> when (prefs.gestures.deleteKeySwipeLeft) {
                     SwipeAction.DELETE_CHARACTERS_PRECISELY -> {
                         florisboard.activeEditorInstance.apply {
-                            setSelection(
-                                (selection.end + event.absUnitCountX).coerceIn(0, selection.end),
+                            selection.updateAndNotify(
+                                (selection.end + event.absUnitCountX + 1).coerceIn(0, selection.end),
                                 selection.end
                             )
                         }
@@ -388,12 +435,10 @@ class KeyView(
                     }
                     SwipeGesture.Direction.LEFT -> {
                         if (prefs.gestures.spaceBarSwipeLeft == SwipeAction.MOVE_CURSOR_LEFT) {
-                            if (!florisboard.activeEditorInstance.isRawInputEditor) {
-                                val s = (initSelectionEnd + event.absUnitCountX).coerceIn(0, florisboard.activeEditorInstance.cachedText.length)
-                                florisboard.activeEditorInstance.setSelection(s, s)
-                            } else {
-                                for (n in 0 until abs(event.relUnitCountX)) {
-                                    florisboard.executeSwipeAction(prefs.gestures.spaceBarSwipeLeft)
+                            abs(event.relUnitCountX).let {
+                                val count = if (!hasTriggeredGestureMove) { it - 1 } else { it }
+                                if (count > 0) {
+                                    florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.downUp(KeyData.ARROW_LEFT, count))
                                 }
                             }
                         } else {
@@ -405,12 +450,10 @@ class KeyView(
                     }
                     SwipeGesture.Direction.RIGHT -> {
                         if (prefs.gestures.spaceBarSwipeRight == SwipeAction.MOVE_CURSOR_RIGHT) {
-                            if (!florisboard.activeEditorInstance.isRawInputEditor) {
-                                val s = (initSelectionEnd + event.absUnitCountX).coerceIn(0, florisboard.activeEditorInstance.cachedText.length)
-                                florisboard.activeEditorInstance.setSelection(s, s)
-                            } else {
-                                for (n in 0 until abs(event.relUnitCountX)) {
-                                    florisboard.executeSwipeAction(prefs.gestures.spaceBarSwipeRight)
+                            abs(event.relUnitCountX).let {
+                                val count = if (!hasTriggeredGestureMove) { it - 1 } else { it }
+                                if (count > 0) {
+                                    florisboard.textInputManager.inputEventDispatcher.send(InputKeyEvent.downUp(KeyData.ARROW_RIGHT, count))
                                 }
                             }
                         } else {
@@ -435,6 +478,25 @@ class KeyView(
      *  by Devunwired
      */
     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+
+        val keyMarginH: Int
+        val keyMarginV: Int
+
+        if (keyboardView.isSmartbarKeyboardView) {
+            keyMarginH = resources.getDimension(R.dimen.key_marginH).toInt()
+            keyMarginV = resources.getDimension(R.dimen.key_marginV).toInt()
+        } else {
+            keyMarginV = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingVertical, context).toInt()
+            keyMarginH = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingHorizontal, context).toInt()
+        }
+
+        (layoutParams as ViewGroup.MarginLayoutParams).setMargins(
+            keyMarginH,
+            keyMarginV,
+            keyMarginH,
+            keyMarginV
+        )
+
         desiredWidth = (keyboardView.desiredKeyWidth * when (keyboardView.computedLayout?.mode) {
             KeyboardMode.NUMERIC,
             KeyboardMode.PHONE,
@@ -447,11 +509,11 @@ class KeyView(
             else -> when (data.code) {
                 KeyCode.SHIFT,
                 KeyCode.DELETE ->
-                        if ((keyboardView.computedLayout?.arrangement?.get(2)?.size ?: 0) > 10) {
-                            1.12f
-                        } else {
-                            1.56f
-                        }
+                    if ((keyboardView.computedLayout?.arrangement?.get(2)?.size ?: 0) > 10) {
+                        1.12f
+                    } else {
+                        1.56f
+                    }
                 KeyCode.VIEW_CHARACTERS,
                 KeyCode.VIEW_SYMBOLS,
                 KeyCode.VIEW_SYMBOLS2,
@@ -524,12 +586,25 @@ class KeyView(
             KeyCode.CLIPBOARD_CUT -> (florisboard != null
                     && florisboard.activeEditorInstance.selection.isSelectionMode
                     && !florisboard.activeEditorInstance.isRawInputEditor)
-            KeyCode.CLIPBOARD_PASTE -> florisboard?.clipboardManager?.hasPrimaryClip() == true
+            KeyCode.CLIPBOARD_PASTE -> (
+                // such gore. checks
+                // 1. has a clipboard item
+                // 2. the clipboard item has any of the supported mime types of the editor OR is plain text.
+                florisboard?.florisClipboardManager?.canBePasted(florisboard.florisClipboardManager?.primaryClip)
+            ) == true
             KeyCode.CLIPBOARD_SELECT_ALL -> {
                 florisboard?.activeEditorInstance?.isRawInputEditor == false
             }
+            KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT -> {
+                visibility = when (prefs.clipboard.enableHistory ) {
+                    true -> VISIBLE
+                    false -> GONE
+                }
+                prefs.clipboard.enableHistory
+            }
             else -> true
         }
+        if (data.code == KeyCode.CLIPBOARD_PASTE)
         if (!isEnabled) {
             isKeyPressed = false
         }
@@ -609,8 +684,17 @@ class KeyView(
             touchHitBox.set(-1, -1, -1, -1)
         } else {
             val parent = parent as ViewGroup
-            val keyMarginH = resources.getDimension((R.dimen.key_marginH)).toInt()
-            val keyMarginV = resources.getDimension((R.dimen.key_marginV)).toInt()
+
+            val keyMarginH: Int
+            val keyMarginV: Int
+
+            if (keyboardView.isSmartbarKeyboardView) {
+                keyMarginH = resources.getDimension(R.dimen.key_marginH).toInt()
+                keyMarginV = resources.getDimension(R.dimen.key_marginV).toInt()
+            } else {
+                keyMarginV = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingVertical, context).toInt()
+                keyMarginH = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingHorizontal, context).toInt()
+            }
 
             touchHitBox.apply {
                 left = when (this@KeyView) {
@@ -653,6 +737,12 @@ class KeyView(
                         }
                 }
             }
+            KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT -> {
+                when (prefs.clipboard.enableHistory) {
+                    true -> VISIBLE
+                    false -> GONE
+                }
+            }
             KeyCode.LANGUAGE_SWITCH -> {
                 val tempUtilityKeyAction = when {
                     prefs.keyboard.utilityKeyEnabled -> prefs.keyboard.utilityKeyAction
@@ -673,7 +763,11 @@ class KeyView(
             }
             else -> if (data.variation != KeyVariation.ALL) {
                 val keyVariation = florisboard?.textInputManager?.keyVariation ?: KeyVariation.NORMAL
-                visibility = if (data.variation == keyVariation) { VISIBLE } else { GONE }
+                visibility = if (data.variation == keyVariation) {
+                    VISIBLE
+                } else {
+                    GONE
+                }
                 updateTouchHitBox()
             }
         }
@@ -748,6 +842,9 @@ class KeyView(
                 KeyCode.CLIPBOARD_SELECT_ALL -> {
                     drawable = getDrawable(context, R.drawable.ic_select_all)
                 }
+                KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT -> {
+                    drawable = getDrawable(context, R.drawable.ic_assignment)
+                }
                 KeyCode.DELETE -> {
                     drawable = getDrawable(context, R.drawable.ic_backspace)
                 }
@@ -789,12 +886,16 @@ class KeyView(
                         KeyboardMode.CHARACTERS -> {
                             label = florisboard?.activeSubtype?.locale?.displayName
                         }
-                        else -> {}
+                        else -> {
+                        }
                     }
                 }
                 KeyCode.SWITCH_TO_MEDIA_CONTEXT -> {
                     drawable = getDrawable(context, R.drawable.ic_sentiment_satisfied)
                 }
+                KeyCode.SWITCH_TO_CLIPBOARD_CONTEXT -> {
+                    drawable = getDrawable(context, R.drawable.ic_assignment)
+                }
                 KeyCode.SWITCH_TO_TEXT_CONTEXT,
                 KeyCode.VIEW_CHARACTERS -> {
                     label = resources.getString(R.string.key__view_characters)
@@ -869,11 +970,11 @@ class KeyView(
                 }
                 else -> when {
                     (data.type == KeyType.CHARACTER || data.type == KeyType.NUMERIC) &&
-                            data.code != KeyCode.SPACE -> {
+                        data.code != KeyCode.SPACE -> {
                         val cachedTextSize = setTextSizeFor(
                             labelPaint,
-                            desiredWidth - (2.6f * drawablePaddingH),
-                            desiredHeight - (3.4f * drawablePaddingV),
+                            measuredWidth - (2.6f * drawablePaddingH),
+                            measuredHeight - (3.4f * drawablePaddingV),
                             // Note: taking a "X" here because it is one of the biggest letters and
                             //  the keys must have the same base character for calculation, else
                             //  they will all look different and weird...
@@ -888,7 +989,7 @@ class KeyView(
                                 else -> 1.0f
                             }
                         )
-                        keyboardView.popupManager.keyPopupTextSize = cachedTextSize
+                        popupManager.keyPopupTextSize = cachedTextSize
                     }
                     else -> {
                         setTextSizeFor(
@@ -911,7 +1012,11 @@ class KeyView(
                 themeValueCache.keyForeground.toSolidColor().color
             }
             labelPaint.alpha = if (keyboardView.computedLayout?.mode == KeyboardMode.CHARACTERS &&
-                data.code == KeyCode.SPACE) { 120 } else { 255 }
+                data.code == KeyCode.SPACE) {
+                120
+            } else {
+                255
+            }
             val centerX = measuredWidth / 2.0f
             val centerY = measuredHeight / 2.0f + (labelPaint.textSize - labelPaint.descent()) / 2
             if (label.contains("\n")) {

app/src/main/java/dev/patrickgold/florisboard/ime/text/keyboard/KeyboardRowView.kt

@@ -23,17 +23,25 @@ import com.google.android.flexbox.FlexDirection
 import com.google.android.flexbox.FlexboxLayout
 import com.google.android.flexbox.JustifyContent
 import dev.patrickgold.florisboard.R
+import dev.patrickgold.florisboard.ime.core.PrefHelper
+import dev.patrickgold.florisboard.util.ViewLayoutUtils
 
 /**
  * This class' sole purpose is to manage the layout within a row of [KeyboardView]. No logic is
  * handled in this class.
  */
-class KeyboardRowView(context: Context) : FlexboxLayout(context) {
+class KeyboardRowView(context: Context, val keyboardView: KeyboardView) : FlexboxLayout(context) {
     init {
+        val prefs: PrefHelper = PrefHelper.getDefaultInstance(context)
+        val keyMarginH = if (keyboardView.isSmartbarKeyboardView){
+            resources.getDimension(R.dimen.key_marginH).toInt()
+        }else{
+            ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingHorizontal, context).toInt()
+        }
         layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT).apply {
             setMargins(
-                resources.getDimension(R.dimen.keyboard_row_marginH).toInt(), 0,
-                resources.getDimension(R.dimen.keyboard_row_marginH).toInt(), 0
+                keyMarginH, 0,
+                keyMarginH, 0
             )
         }
         flexDirection = FlexDirection.ROW
@@ -49,4 +57,19 @@ class KeyboardRowView(context: Context) : FlexboxLayout(context) {
     override fun onTouchEvent(event: MotionEvent?): Boolean {
         return false
     }
+
+    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+        val prefs: PrefHelper = PrefHelper.getDefaultInstance(context)
+        val keyMarginH = if (keyboardView.isSmartbarKeyboardView){
+            resources.getDimension(R.dimen.key_marginH).toInt()
+        }else{
+            ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingHorizontal, context).toInt()
+        }
+        (layoutParams as MarginLayoutParams).setMargins(
+            keyMarginH, 0,
+            keyMarginH, 0
+        )
+
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec)
+    }
 }

app/src/main/java/dev/patrickgold/florisboard/ime/text/keyboard/KeyboardView.kt

@@ -27,15 +27,17 @@ import androidx.core.view.children
 import com.google.android.flexbox.FlexboxLayout
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.core.FlorisBoard
+import dev.patrickgold.florisboard.ime.core.InputKeyEvent
 import dev.patrickgold.florisboard.ime.core.PrefHelper
-import dev.patrickgold.florisboard.ime.popup.PopupManager
 import dev.patrickgold.florisboard.ime.text.gestures.SwipeAction
-import dev.patrickgold.florisboard.ime.text.key.KeyView
-import dev.patrickgold.florisboard.ime.text.layout.ComputedLayoutData
 import dev.patrickgold.florisboard.ime.text.gestures.SwipeGesture
 import dev.patrickgold.florisboard.ime.text.key.KeyCode
+import dev.patrickgold.florisboard.ime.text.key.KeyData
+import dev.patrickgold.florisboard.ime.text.key.KeyView
+import dev.patrickgold.florisboard.ime.text.layout.ComputedLayoutData
 import dev.patrickgold.florisboard.ime.theme.Theme
 import dev.patrickgold.florisboard.ime.theme.ThemeManager
+import dev.patrickgold.florisboard.util.ViewLayoutUtils
 import kotlin.math.roundToInt
 
 /**
@@ -48,10 +50,8 @@ import kotlin.math.roundToInt
  */
 class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Listener,
     ThemeManager.OnThemeUpdatedListener {
-    private var activeKeyView: KeyView? = null
-    private var activePointerId: Int? = null
-    private var activeX: Float = 0.0f
-    private var activeY: Float = 0.0f
+    private var activeKeyViews: MutableMap<Int, KeyView> = mutableMapOf()
+    private var initialKeyCodes: MutableMap<Int, Int> = mutableMapOf()
 
     var computedLayout: ComputedLayoutData? = null
         set(v) {
@@ -61,11 +61,9 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
     var desiredKeyWidth: Int = resources.getDimension(R.dimen.key_width).toInt()
     var desiredKeyHeight: Int = resources.getDimension(R.dimen.key_height).toInt()
     var florisboard: FlorisBoard? = FlorisBoard.getInstanceOrNull()
-    private var initialKeyCode: Int = 0
     private val isPreviewMode: Boolean
     val isSmartbarKeyboardView: Boolean
     val isLoadingPlaceholderKeyboard: Boolean
-    var popupManager = PopupManager<KeyboardView, KeyView>(this, florisboard?.popupLayerView)
     private val prefs: PrefHelper = PrefHelper.getDefaultInstance(context)
     private val themeManager: ThemeManager = ThemeManager.default()
     private val swipeGestureDetector = SwipeGesture.Detector(context, this)
@@ -97,7 +95,7 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
         destroyLayout()
         val computedLayout = computedLayout ?: return
         for (row in computedLayout.arrangement) {
-            val rowView = KeyboardRowView(context)
+            val rowView = KeyboardRowView(context, this)
             for (key in row) {
                 val keyView = KeyView(this, key, florisboard)
                 rowView.addView(keyView)
@@ -131,7 +129,6 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
      * Dismisses all shown key popups when keyboard is detached from window.
      */
     override fun onDetachedFromWindow() {
-        popupManager.dismissAllPopups()
         if (!isPreviewMode) {
             themeManager.unregisterOnThemeUpdatedListener(this)
         }
@@ -170,92 +167,93 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
      */
     @SuppressLint("ClickableViewAccessibility")
     override fun onTouchEvent(event: MotionEvent?): Boolean {
-        event ?: return false
-        if (isPreviewMode || isLoadingPlaceholderKeyboard) {
-            return false
-        }
-        val eventFloris = MotionEvent.obtainNoHistory(event)
+        if (event == null || isPreviewMode || isLoadingPlaceholderKeyboard) return false
+
         if (!isSmartbarKeyboardView && swipeGestureDetector.onTouchEvent(event)) {
-            sendFlorisTouchEvent(eventFloris, MotionEvent.ACTION_CANCEL)
-            activeKeyView = null
-            activePointerId = null
+            for (pointerIndex in 0 until event.pointerCount) {
+                val pointerId = event.getPointerId(pointerIndex)
+                sendFlorisTouchEvent(event, pointerIndex, pointerId, MotionEvent.ACTION_CANCEL)
+                activeKeyViews.remove(pointerId)
+            }
+            if (event.actionMasked == MotionEvent.ACTION_UP || event.actionMasked == MotionEvent.ACTION_CANCEL) {
+                florisboard?.textInputManager?.inputEventDispatcher?.send(InputKeyEvent.up(KeyData.INTERNAL_BATCH_EDIT))
+            }
             return true
         }
-        val pointerIndex = event.actionIndex
-        var pointerId = event.getPointerId(pointerIndex)
+
         when (event.actionMasked) {
-            MotionEvent.ACTION_DOWN,
+            MotionEvent.ACTION_DOWN -> {
+                florisboard?.textInputManager?.inputEventDispatcher?.send(InputKeyEvent.down(KeyData.INTERNAL_BATCH_EDIT))
+                val pointerIndex = event.actionIndex
+                val pointerId = event.getPointerId(pointerIndex)
+                searchForActiveKeyView(event, pointerIndex, pointerId)
+                initialKeyCodes[pointerId] = activeKeyViews[pointerId]?.data?.code ?: 0
+                sendFlorisTouchEvent(event, pointerIndex, pointerId, MotionEvent.ACTION_DOWN)
+            }
             MotionEvent.ACTION_POINTER_DOWN -> {
-                if (activePointerId == null) {
-                    activePointerId = pointerId
-                    activeX = event.getX(pointerIndex)
-                    activeY = event.getY(pointerIndex)
-                    searchForActiveKeyView()
-                    initialKeyCode = activeKeyView?.data?.code ?: 0
-                    sendFlorisTouchEvent(eventFloris, MotionEvent.ACTION_DOWN)
-                } else if (activePointerId != pointerId) {
-                    // New pointer arrived. Send ACTION_UP to current active view and move on
-                    sendFlorisTouchEvent(eventFloris, MotionEvent.ACTION_UP)
-                    activePointerId = pointerId
-                    activeX = event.getX(pointerIndex)
-                    activeY = event.getY(pointerIndex)
-                    searchForActiveKeyView()
-                    initialKeyCode = activeKeyView?.data?.code ?: 0
-                    sendFlorisTouchEvent(eventFloris, MotionEvent.ACTION_DOWN)
-                }
+                val pointerIndex = event.actionIndex
+                val pointerId = event.getPointerId(pointerIndex)
+                searchForActiveKeyView(event, pointerIndex, pointerId)
+                initialKeyCodes[pointerId] = activeKeyViews[pointerId]?.data?.code ?: 0
+                sendFlorisTouchEvent(event, pointerIndex, pointerId, MotionEvent.ACTION_DOWN)
             }
             MotionEvent.ACTION_MOVE -> {
-                for (index in 0 until event.pointerCount) {
-                    pointerId = event.getPointerId(index)
-                    if (activePointerId == pointerId) {
-                        activeX = event.getX(index)
-                        activeY = event.getY(index)
-                        if (activeKeyView == null) {
-                            searchForActiveKeyView()
-                            sendFlorisTouchEvent(eventFloris, MotionEvent.ACTION_DOWN)
-                        } else {
-                            sendFlorisTouchEvent(eventFloris, MotionEvent.ACTION_MOVE)
-                        }
+                for (pointerIndex in 0 until event.pointerCount) {
+                    val pointerId = event.getPointerId(pointerIndex)
+                    if (!activeKeyViews.containsKey(pointerId)) {
+                        searchForActiveKeyView(event, pointerIndex, pointerId)
+                        sendFlorisTouchEvent(event, pointerIndex, pointerId, MotionEvent.ACTION_DOWN)
+                    } else {
+                        sendFlorisTouchEvent(event, pointerIndex, pointerId, MotionEvent.ACTION_MOVE)
                     }
                 }
             }
-            MotionEvent.ACTION_UP,
-            MotionEvent.ACTION_CANCEL,
             MotionEvent.ACTION_POINTER_UP -> {
-                if (activePointerId == pointerId) {
-                    sendFlorisTouchEvent(eventFloris, MotionEvent.ACTION_UP)
-                    activeKeyView = null
-                    activePointerId = null
-                }
+                val pointerIndex = event.actionIndex
+                val pointerId = event.getPointerId(pointerIndex)
+                sendFlorisTouchEvent(event, pointerIndex, pointerId, event.actionMasked)
+                activeKeyViews.remove(pointerId)
+            }
+            MotionEvent.ACTION_UP,
+            MotionEvent.ACTION_CANCEL -> {
+                val pointerIndex = event.actionIndex
+                val pointerId = event.getPointerId(pointerIndex)
+                sendFlorisTouchEvent(event, pointerIndex, pointerId, event.actionMasked)
+                activeKeyViews.remove(pointerId)
+                florisboard?.textInputManager?.inputEventDispatcher?.send(InputKeyEvent.up(KeyData.INTERNAL_BATCH_EDIT))
             }
             else -> return false
         }
-        eventFloris.recycle()
         return true
     }
 
     /**
-     * Sends a touch [event] to [activeKeyView] with action set to [actionParam]. Normalizes passed
-     * actions (ACTION_POINTER_* will be converted to ACTION_*). Translates the absolute coords of
-     * a passed [event] to relative ones so the [activeKeyView] can work with it.
+     * Sends a touch [event] to the active key view which is associated with given [pointerId]. The action of the
+     * event is set to [actionParam]. Normalizes passed actions (ACTION_POINTER_* will be converted to ACTION_*).
+     * Translates the absolute coords of a passed [event] to relative ones so the active key view can work with it.
      *
-     * @param event The event to pass to [activeKeyView].
+     * @param event The event to pass to the active key view.
+     * @param pointerIndex The index of the pointer, used for getting coordinates.
+     * @param pointerId The unique ID of the pointer, used to reference the active key view.
      * @param actionParam The action to set the [event] to.
      */
-    private fun sendFlorisTouchEvent(event: MotionEvent, actionParam: Int) {
-        val keyView = activeKeyView ?: return
-        val keyViewParent = keyView.parent as ViewGroup
-        keyView.onFlorisTouchEvent(event.apply {
-            action = when (actionParam) {
+    private fun sendFlorisTouchEvent(event: MotionEvent, pointerIndex: Int, pointerId: Int, actionParam: Int) {
+        val keyView = activeKeyViews[pointerId] ?: return
+        val keyViewParent = keyView.parent as? ViewGroup ?: return
+        val eventToSend = MotionEvent.obtain(
+            event.downTime,
+            event.eventTime,
+            when (actionParam) {
                 MotionEvent.ACTION_POINTER_DOWN -> MotionEvent.ACTION_DOWN
                 MotionEvent.ACTION_POINTER_UP -> MotionEvent.ACTION_UP
                 else -> actionParam
-            }
-            setLocation(
-                activeX - keyViewParent.x - keyView.x,
-                activeY - keyViewParent.y - keyView.y
-            )
-        })
+            },
+            event.getX(pointerIndex) - keyViewParent.x - keyView.x,
+            event.getY(pointerIndex) - keyViewParent.y - keyView.y,
+            0
+        )
+        keyView.onFlorisTouchEvent(eventToSend)
+        eventToSend.recycle()
     }
 
     /**
@@ -264,7 +262,7 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
      */
     override fun onSwipe(event: SwipeGesture.Event): Boolean {
         return when {
-            initialKeyCode == KeyCode.DELETE -> {
+            initialKeyCodes[event.pointerId] == KeyCode.DELETE -> {
                 if (event.type == SwipeGesture.Type.TOUCH_UP && event.direction == SwipeGesture.Direction.LEFT &&
                     prefs.gestures.deleteKeySwipeLeft == SwipeAction.DELETE_WORD) {
                     florisboard?.executeSwipeAction(prefs.gestures.deleteKeySwipeLeft)
@@ -273,7 +271,16 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
                     false
                 }
             }
-            initialKeyCode > KeyCode.SPACE && !popupManager.isShowingExtendedPopup -> when {
+            initialKeyCodes[event.pointerId] == KeyCode.SHIFT && activeKeyViews[event.pointerId]?.data?.code != KeyCode.SHIFT &&
+                event.type == SwipeGesture.Type.TOUCH_UP -> {
+                activeKeyViews[event.pointerId]?.let {
+                    florisboard?.textInputManager?.inputEventDispatcher?.send(InputKeyEvent.up(it.popupManager.getActiveKeyData(it) ?: it.data))
+                    florisboard?.textInputManager?.inputEventDispatcher?.send(InputKeyEvent.cancel(KeyData.SHIFT))
+                }
+                true
+            }
+            initialKeyCodes[event.pointerId] ?: 0 > KeyCode.SPACE &&
+                activeKeyViews[event.pointerId]?.popupManager?.isShowingExtendedPopup == false -> when {
                 !prefs.glide.enabled -> when (event.type) {
                     SwipeGesture.Type.TOUCH_UP -> {
                         val swipeAction = when (event.direction) {
@@ -299,15 +306,17 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
     }
 
     /**
-     * Searches for an active key view at [activeX]/[activeY].
+     * Searches for an active key view at the passed pointer location.
      */
-    private fun searchForActiveKeyView() {
+    private fun searchForActiveKeyView(event: MotionEvent, pointerIndex: Int, pointerId: Int) {
+        val activeX = event.getX(pointerIndex)
+        val activeY = event.getY(pointerIndex)
         loop@ for (row in children) {
             if (row is FlexboxLayout) {
                 for (keyView in row.children) {
                     if (keyView is KeyView) {
                         if (keyView.touchHitBox.contains(activeX.toInt(), activeY.toInt())) {
-                            activeKeyView = keyView
+                            activeKeyViews[pointerId] = keyView
                             break@loop
                         }
                     }
@@ -317,22 +326,28 @@ class KeyboardView : LinearLayout, FlorisBoard.EventListener, SwipeGesture.Liste
     }
 
     /**
-     * Invalidates the current [activeKeyView] and sends a [MotionEvent.ACTION_CANCEL] to indicate
-     * the loss of focus.
+     * Invalidates the current active key view and sends a [MotionEvent.ACTION_CANCEL] to indicate the loss of focus.
      */
-    fun dismissActiveKeyViewReference() {
-        activeKeyView?.onFlorisTouchEvent(MotionEvent.obtain(
+    fun dismissActiveKeyViewReference(pointerId: Int) {
+        activeKeyViews.remove(pointerId)?.onFlorisTouchEvent(MotionEvent.obtain(
             0, 0, MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0
         ))
-        activeKeyView = null
     }
 
     /**
      * The desired key heights/widths are being calculated here.
      */
     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
-        val keyMarginH = resources.getDimension((R.dimen.key_marginH)).toInt()
-        val keyMarginV = resources.getDimension((R.dimen.key_marginV)).toInt()
+        val keyMarginH: Int
+        val keyMarginV: Int
+
+        if (isSmartbarKeyboardView){
+            keyMarginH = resources.getDimension(R.dimen.key_marginH).toInt()
+            keyMarginV = resources.getDimension(R.dimen.key_marginV).toInt()
+        }else {
+            keyMarginV = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingVertical, context).toInt()
+            keyMarginH = ViewLayoutUtils.convertDpToPixel(prefs.keyboard.keySpacingHorizontal, context).toInt()
+        }
 
         val desiredWidth = MeasureSpec.getSize(widthMeasureSpec).toFloat()
         desiredKeyWidth = if (isSmartbarKeyboardView) {

app/src/main/java/dev/patrickgold/florisboard/ime/text/layout/LayoutData.kt

@@ -18,7 +18,6 @@ package dev.patrickgold.florisboard.ime.text.layout
 
 import dev.patrickgold.florisboard.ime.text.key.FlorisKeyData
 import dev.patrickgold.florisboard.ime.text.key.KeyCode
-import dev.patrickgold.florisboard.ime.text.key.KeyData
 import dev.patrickgold.florisboard.ime.text.key.KeyType
 import dev.patrickgold.florisboard.ime.text.keyboard.KeyboardMode
 

app/src/main/java/dev/patrickgold/florisboard/ime/text/layout/LayoutManager.kt

@@ -17,8 +17,6 @@
 package dev.patrickgold.florisboard.ime.text.layout
 
 import android.content.Context
-import com.github.michaelbull.result.getOr
-import com.github.michaelbull.result.onSuccess
 import com.squareup.moshi.Moshi
 import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
 import dev.patrickgold.florisboard.ime.core.PrefHelper
@@ -79,10 +77,10 @@ class LayoutManager(private val context: Context) : CoroutineScope by MainScope(
             source = AssetSource.Assets,
             path = PopupManager.POPUP_EXTENSION_PATH_REL + "/" + (subtype?.locale?.language ?: "\$default") + ".json"
         )
-        assetManager.loadAsset(langTagRef, PopupExtension::class.java).onSuccess {
+        assetManager.loadAsset(langTagRef, PopupExtension::class).onSuccess {
             return it
         }
-        assetManager.loadAsset(langRef, PopupExtension::class.java).onSuccess {
+        assetManager.loadAsset(langRef, PopupExtension::class).onSuccess {
             return it
         }
         return PopupExtension.empty()
@@ -164,7 +162,8 @@ class LayoutManager(private val context: Context) : CoroutineScope by MainScope(
         }
 
         // Add popup to keys
-        if (keyboardMode == KeyboardMode.CHARACTERS) {
+        if (keyboardMode == KeyboardMode.CHARACTERS || keyboardMode == KeyboardMode.NUMERIC_ADVANCED ||
+            keyboardMode == KeyboardMode.SYMBOLS || keyboardMode == KeyboardMode.SYMBOLS2) {
             val extendedPopupsDefault = loadExtendedPopups()
             val extendedPopups = loadExtendedPopups(subtype)
             for (row in computedArrangement) {

app/src/main/java/dev/patrickgold/florisboard/ime/text/smartbar/SmartbarView.kt

@@ -53,6 +53,7 @@ class SmartbarView : ConstraintLayout, ThemeManager.OnThemeUpdatedListener {
     private val themeManager = ThemeManager.default()
     private var eventListener: WeakReference<EventListener?>? = null
     private val mainScope = MainScope()
+    private var lastSuggestionInitDate: Long = 0
 
     private var cachedActionStartAreaVisible: Boolean = false
     @IdRes private var cachedActionStartAreaId: Int? = null
@@ -121,6 +122,22 @@ class SmartbarView : ConstraintLayout, ThemeManager.OnThemeUpdatedListener {
             }
         }
 
+        binding.candidate0.setOnClickListener {
+            if (it is Button) {
+                eventListener?.get()?.onSmartbarCandidatePressed(it.text.toString())
+            }
+        }
+        binding.candidate1.setOnClickListener {
+            if (it is Button) {
+                eventListener?.get()?.onSmartbarCandidatePressed(it.text.toString())
+            }
+        }
+        binding.candidate2.setOnClickListener {
+            if (it is Button) {
+                eventListener?.get()?.onSmartbarCandidatePressed(it.text.toString())
+            }
+        }
+
         binding.clipboardSuggestion.setOnClickListener {
             florisboard?.activeEditorInstance?.performClipboardPaste()
             shouldSuggestClipboardContents = false
@@ -259,7 +276,8 @@ class SmartbarView : ConstraintLayout, ThemeManager.OnThemeUpdatedListener {
                             KeyboardMode.PHONE2 -> null
                             else -> when {
                                 florisboard.activeEditorInstance.isComposingEnabled &&
-                                        shouldSuggestClipboardContents
+                                    shouldSuggestClipboardContents &&
+                                    florisboard.activeEditorInstance.selection.isCursorMode
                                 -> R.id.clipboard_suggestion_row
                                 florisboard.activeEditorInstance.isComposingEnabled &&
                                         florisboard.activeEditorInstance.selection.isCursorMode
@@ -283,9 +301,14 @@ class SmartbarView : ConstraintLayout, ThemeManager.OnThemeUpdatedListener {
 
     fun onPrimaryClipChanged() {
         if (prefs.suggestion.enabled && prefs.suggestion.suggestClipboardContent &&
-            florisboard?.activeEditorInstance?.isPrivateMode == false) {
-            shouldSuggestClipboardContents = true
-            val item = florisboard.clipboardManager?.primaryClip?.getItemAt(0)
+            florisboard?.activeEditorInstance?.isPrivateMode == false ) {
+
+                // only suggest if mime types make sense.
+                shouldSuggestClipboardContents = florisboard.florisClipboardManager?.canBePasted(
+                    florisboard.florisClipboardManager?.primaryClip
+                ) == true
+
+            val item = florisboard.florisClipboardManager?.primaryClip
             when {
                 item?.text != null -> {
                     binding.clipboardSuggestion.text = item.text
@@ -306,6 +329,28 @@ class SmartbarView : ConstraintLayout, ThemeManager.OnThemeUpdatedListener {
         updateSmartbarState()
     }
 
+    fun setCandidateSuggestionWords(suggestionInitDate: Long, suggestions: List<String>) {
+        if (suggestionInitDate > lastSuggestionInitDate) {
+            lastSuggestionInitDate = suggestionInitDate
+            binding.candidate1.text = suggestions.getOrNull(0) ?: ""
+            binding.candidate0.text = suggestions.getOrNull(1) ?: ""
+            binding.candidate2.text = suggestions.getOrNull(2) ?: ""
+        }
+    }
+
+    fun updateCandidateSuggestionCapsState() {
+        val tim = florisboard?.textInputManager ?: return
+        if (tim.capsLock) {
+            binding.candidate0.text = binding.candidate0.text.toString().toUpperCase(florisboard.activeSubtype.locale)
+            binding.candidate1.text = binding.candidate1.text.toString().toUpperCase(florisboard.activeSubtype.locale)
+            binding.candidate2.text = binding.candidate2.text.toString().toUpperCase(florisboard.activeSubtype.locale)
+        } else {
+            binding.candidate0.text = binding.candidate0.text.toString().toLowerCase(florisboard.activeSubtype.locale)
+            binding.candidate1.text = binding.candidate1.text.toString().toLowerCase(florisboard.activeSubtype.locale)
+            binding.candidate2.text = binding.candidate2.text.toString().toLowerCase(florisboard.activeSubtype.locale)
+        }
+    }
+
     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
         val heightMode = MeasureSpec.getMode(heightMeasureSpec)
         val heightSize = MeasureSpec.getSize(heightMeasureSpec).toFloat()
@@ -348,7 +393,7 @@ class SmartbarView : ConstraintLayout, ThemeManager.OnThemeUpdatedListener {
      */
     interface EventListener {
         fun onSmartbarBackButtonPressed() {}
-        //fun onSmartbarCandidatePressed() {}
+        fun onSmartbarCandidatePressed(word: String) {}
         //fun onSmartbarCandidateLongPressed() {}
         fun onSmartbarPrivateModeButtonClicked() {}
         fun onSmartbarQuickActionPressed(@IdRes quickActionId: Int) {}

app/src/main/java/dev/patrickgold/florisboard/ime/theme/ThemeManager.kt

@@ -22,7 +22,7 @@ import android.content.Context
 import android.content.pm.PackageManager
 import android.content.res.Configuration
 import android.graphics.Color
-import com.github.michaelbull.result.*
+import android.net.Uri
 import dev.patrickgold.florisboard.ime.core.PrefHelper
 import dev.patrickgold.florisboard.ime.extension.AssetManager
 import dev.patrickgold.florisboard.ime.extension.AssetRef
@@ -58,10 +58,10 @@ class ThemeManager private constructor(
         private set
 
     companion object {
-        /**
-         * The static relative path where a theme is located, regardless of the [AssetSource].
-         */
+        /** The static relative path where a theme is located, regardless of the [AssetSource]. */
         const val THEME_PATH_REL: String = "ime/theme"
+        /** Maximum size in bytes a theme file may have when loaded. */
+        const val THEME_MAX_SIZE: Int = 512_000
 
         private var defaultInstance: ThemeManager? = null
 
@@ -85,6 +85,8 @@ class ThemeManager private constructor(
                 )
             }
         }
+
+        fun defaultOrNull(): ThemeManager? = defaultInstance
     }
 
     init {
@@ -92,7 +94,7 @@ class ThemeManager private constructor(
     }
 
     /**
-     * Updates the current theme ref and loads the corresponding theme, as well as notfies all
+     * Updates the current theme ref and loads the corresponding theme, as well as notifies all
      * callback receivers about the new theme.
      */
     fun update() {
@@ -102,7 +104,7 @@ class ThemeManager private constructor(
         activeTheme = AdaptiveThemeOverlay(this, if (ref == null) {
             Theme.BASE_THEME
         } else {
-            loadTheme(ref).getOr(Theme.BASE_THEME)
+            loadTheme(ref).getOrDefault(Theme.BASE_THEME)
         })
         Timber.i(activeTheme.label)
         notifyCallbackReceivers()
@@ -247,23 +249,30 @@ class ThemeManager private constructor(
         }
     }
 
-    fun deleteTheme(ref: AssetRef): Result<Nothing?, Throwable> {
+    fun deleteTheme(ref: AssetRef): Result<Unit> {
         return assetManager.deleteAsset(ref)
     }
 
-    fun loadTheme(ref: AssetRef): Result<Theme, Throwable> {
-        assetManager.loadAsset(ref, ThemeJson::class.java).onSuccess { themeJson ->
-            val theme = themeJson.toTheme()
-            return Ok(theme)
-        }.onFailure {
+    fun loadTheme(ref: AssetRef): Result<Theme> {
+        val themeJson = assetManager.loadAsset(ref, ThemeJson::class).getOrElse {
             Timber.e(it.toString())
-            return Err(it)
+            return Result.failure(it)
         }
-        return Err(Exception("Unreachable code"))
+        val theme = themeJson.toTheme()
+        return Result.success(theme)
     }
 
-    fun writeTheme(ref: AssetRef, theme: Theme): Result<Boolean, Throwable> {
-        return assetManager.writeAsset(ref, ThemeJson::class.java, ThemeJson.fromTheme(theme))
+    fun loadTheme(uri: Uri): Result<Theme> {
+        val themeJson = assetManager.loadAsset(uri, ThemeJson::class, THEME_MAX_SIZE).getOrElse {
+            Timber.e(it.toString())
+            return Result.failure(it)
+        }
+        val theme = themeJson.toTheme()
+        return Result.success(theme)
+    }
+
+    fun writeTheme(ref: AssetRef, theme: Theme): Result<Unit> {
+        return assetManager.writeAsset(ref, ThemeJson::class, ThemeJson.fromTheme(theme))
     }
 
     private fun evaluateActiveThemeRef(): AssetRef? {
@@ -300,7 +309,7 @@ class ThemeManager private constructor(
                     prefs.theme.dayThemeRef
                 }
             }
-        }).onFailure { Timber.e(it) }.getOr(null)
+        }).onFailure { Timber.e(it) }.getOrDefault(null)
     }
 
     private fun indexThemeRefs() {
@@ -308,7 +317,7 @@ class ThemeManager private constructor(
         indexedNightThemeRefs.clear()
         assetManager.listAssets(
             AssetRef(AssetSource.Assets, THEME_PATH_REL),
-            ThemeMetaOnly::class.java
+            ThemeMetaOnly::class
         ).onSuccess {
             for ((ref, themeMetaOnly) in it) {
                 if (themeMetaOnly.isNightTheme) {
@@ -322,7 +331,7 @@ class ThemeManager private constructor(
         }
         assetManager.listAssets(
             AssetRef(AssetSource.Internal, THEME_PATH_REL),
-            ThemeMetaOnly::class.java
+            ThemeMetaOnly::class
         ).onSuccess {
             for ((ref, themeMetaOnly) in it) {
                 if (themeMetaOnly.isNightTheme) {

app/src/main/java/dev/patrickgold/florisboard/settings/AboutActivity.kt

@@ -16,6 +16,7 @@
 
 package dev.patrickgold.florisboard.settings
 
+import android.annotation.SuppressLint
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
@@ -32,6 +33,7 @@ class AboutActivity : AppCompatActivity() {
     private lateinit var binding: AboutActivityBinding
     private var licensesAlertDialog: AlertDialog? = null
 
+    @SuppressLint("SetTextI18n")
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         binding = AboutActivityBinding.inflate(layoutInflater)
@@ -41,7 +43,7 @@ class AboutActivity : AppCompatActivity() {
         setSupportActionBar(toolbar)
 
         // Set app version string
-        binding.appVersion.text = AppVersionUtils.getRawVersionName(this)
+        binding.appVersion.text = "v" + AppVersionUtils.getRawVersionName(this)
 
         // Set onClickListeners for buttons
         binding.privacyPolicyButton.setOnClickListener {

app/src/main/java/dev/patrickgold/florisboard/settings/ThemeEditorActivity.kt

@@ -28,10 +28,10 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
 import androidx.core.view.children
 import androidx.core.view.forEach
-import com.github.michaelbull.result.onSuccess
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.databinding.ThemeEditorActivityBinding
 import dev.patrickgold.florisboard.databinding.ThemeEditorGroupViewBinding
+import dev.patrickgold.florisboard.databinding.ThemeEditorMetaDialogBinding
 import dev.patrickgold.florisboard.ime.core.PrefHelper
 import dev.patrickgold.florisboard.ime.core.Subtype
 import dev.patrickgold.florisboard.ime.extension.AssetRef
@@ -60,6 +60,12 @@ class ThemeEditorActivity : AppCompatActivity() {
     private var editedThemeRef: AssetRef? = null
     private var isSaved: Boolean = false
 
+    private var themeLabel: String = ""
+        set(v) {
+            field = v
+            binding.themeNameLabel.text = v
+        }
+
     companion object {
         /** Constant code for a theme saved activity result. */
         const val RESULT_CODE_THEME_EDIT_SAVED: Int = 0xFBADC1
@@ -85,6 +91,8 @@ class ThemeEditorActivity : AppCompatActivity() {
             }
         }
 
+        binding.themeNameEditBtn.setOnClickListener { showMetaEditDialog() }
+
         val toolbar = findViewById<Toolbar>(R.id.toolbar)
         setSupportActionBar(toolbar)
 
@@ -129,22 +137,13 @@ class ThemeEditorActivity : AppCompatActivity() {
             R.id.add_group_btn -> addGroup()
             R.id.theme_cancel_btn -> onBackPressed()
             R.id.theme_save_btn -> {
-                val themeName = binding.themeNameValue.text.toString().trim()
-                if (Theme.validateField(Theme.ValidationField.THEME_LABEL, themeName)) {
-                    val ref = editedThemeRef
-                    if (ref != null) {
-                        themeManager.writeTheme(
-                            ref, editedTheme.copy(
-                                label = themeName
-                            )
-                        )
-                        isSaved = true
-                        finish()
-                    }
-                } else {
-                    binding.themeNameLabel.error =
-                        resources.getString(R.string.settings__theme_editor__error_theme_label_empty)
-                    binding.themeNameLabel.isErrorEnabled = true
+                val ref = editedThemeRef
+                if (ref != null) {
+                    themeManager.writeTheme(
+                        ref, editedTheme.copy(label = themeLabel)
+                    )
+                    isSaved = true
+                    finish()
                 }
             }
         }
@@ -305,7 +304,7 @@ class ThemeEditorActivity : AppCompatActivity() {
             }
         }
         editedTheme = editedTheme.copy(
-            label = binding.themeNameValue.text.toString(),
+            label = themeLabel,
             attributes = tempMap.toMap()
         )
         binding.keyboardPreview.onThemeUpdated(editedTheme)
@@ -315,7 +314,7 @@ class ThemeEditorActivity : AppCompatActivity() {
      * Builds the Ui for the current [editedTheme]. Also sorts the groups afterwards.
      */
     private fun buildUi() {
-        binding.themeNameValue.setText(editedTheme.label)
+        themeLabel = editedTheme.label
         for ((groupName, groupAttrs) in editedTheme.attributes) {
             val groupView = addGroup(groupName).root
             for ((attrName, attrValue) in groupAttrs) {
@@ -330,4 +329,29 @@ class ThemeEditorActivity : AppCompatActivity() {
         }
         sortGroups()
     }
+
+    private fun showMetaEditDialog() {
+        val dialogView = ThemeEditorMetaDialogBinding.inflate(layoutInflater)
+        dialogView.metaName.setText(editedTheme.label)
+        val dialog: AlertDialog
+        AlertDialog.Builder(this).apply {
+            setTitle(R.string.settings__theme_editor__edit_theme_name_dialog_title)
+            setCancelable(true)
+            setView(dialogView.root)
+            setPositiveButton(android.R.string.ok, null)
+            setNegativeButton(android.R.string.cancel, null)
+            create()
+            dialog = show()
+            dialog.getButton(android.app.AlertDialog.BUTTON_POSITIVE)?.setOnClickListener {
+                val tempThemeLabel = dialogView.metaName.text.toString().trim()
+                if (Theme.validateField(Theme.ValidationField.THEME_LABEL, tempThemeLabel)) {
+                    themeLabel = tempThemeLabel
+                    dialog.dismiss()
+                } else {
+                    dialogView.metaNameLabel.error = resources.getString(R.string.settings__theme_editor__error_theme_label_empty)
+                    dialogView.metaNameLabel.isErrorEnabled = true
+                }
+            }
+        }
+    }
 }

app/src/main/java/dev/patrickgold/florisboard/settings/ThemeManagerActivity.kt

@@ -17,26 +17,28 @@
 package dev.patrickgold.florisboard.settings
 
 import android.content.Intent
+import android.net.Uri
 import android.os.Bundle
 import android.view.MenuItem
 import android.view.View
 import android.widget.LinearLayout
 import android.widget.RadioButton
 import android.widget.Toast
+import androidx.activity.result.ActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.annotation.IdRes
 import androidx.appcompat.app.AlertDialog
-import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
 import androidx.core.view.forEach
-import com.github.michaelbull.result.getOr
-import com.github.michaelbull.result.onFailure
-import com.github.michaelbull.result.onSuccess
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.databinding.ThemeManagerActivityBinding
+import dev.patrickgold.florisboard.ime.core.FlorisActivity
 import dev.patrickgold.florisboard.ime.core.PrefHelper
 import dev.patrickgold.florisboard.ime.core.Subtype
+import dev.patrickgold.florisboard.ime.extension.AssetManager
 import dev.patrickgold.florisboard.ime.extension.AssetRef
 import dev.patrickgold.florisboard.ime.extension.AssetSource
+import dev.patrickgold.florisboard.ime.extension.ExternalContentUtils
 import dev.patrickgold.florisboard.ime.text.keyboard.KeyboardMode
 import dev.patrickgold.florisboard.ime.text.layout.LayoutManager
 import dev.patrickgold.florisboard.ime.theme.Theme
@@ -47,11 +49,9 @@ import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.launch
 import timber.log.Timber
 
-class ThemeManagerActivity : AppCompatActivity() {
-    private lateinit var binding: ThemeManagerActivityBinding
+class ThemeManagerActivity : FlorisActivity<ThemeManagerActivityBinding>() {
     private lateinit var layoutManager: LayoutManager
     private val mainScope = MainScope()
-    private lateinit var prefs: PrefHelper
     private val themeManager: ThemeManager = ThemeManager.default()
 
     private var key: String = ""
@@ -59,19 +59,70 @@ class ThemeManagerActivity : AppCompatActivity() {
     private var selectedTheme: Theme = Theme.empty()
     private var selectedRef: AssetRef? = null
 
-    companion object {
-        private const val EDITOR_REQ_CODE: Int = 0xFB01
+    private val themeEditor = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result: ActivityResult? ->
+        if (result?.resultCode == ThemeEditorActivity.RESULT_CODE_THEME_EDIT_SAVED) {
+            themeManager.update()
+            buildUi()
+        }
+    }
 
+    private val importTheme = registerForActivityResult(ActivityResultContracts.GetContent()) { uri: Uri? ->
+        // If uri is null it indicates that the selection activity was cancelled (mostly by pressing the back button),
+        // so we don't display an error message here.
+        if (uri == null) return@registerForActivityResult
+        val toBeImportedTheme = themeManager.loadTheme(uri)
+        if (toBeImportedTheme.isSuccess) {
+            val newTheme = toBeImportedTheme.getOrNull()!!.copy(
+                name = toBeImportedTheme.getOrNull()!!.name + "_imported",
+                label = toBeImportedTheme.getOrNull()!!.label + " (Imported)"
+            )
+            val newAssetRef = AssetRef(
+                AssetSource.Internal,
+                ThemeManager.THEME_PATH_REL + "/" + newTheme.name + ".json"
+            )
+            themeManager.writeTheme(newAssetRef, newTheme).onSuccess {
+                themeManager.update()
+                selectedTheme = newTheme
+                selectedRef = newAssetRef
+                setThemeRefInPrefs(newAssetRef)
+                buildUi()
+                showMessage(R.string.settings__theme_manager__theme_import_success)
+            }.onFailure {
+                showError(it)
+            }
+        } else {
+            showError(toBeImportedTheme.exceptionOrNull()!!)
+        }
+    }
+
+    private val exportTheme = registerForActivityResult(ActivityResultContracts.CreateDocument()) { uri: Uri? ->
+        // If uri is null it indicates that the selection activity was cancelled (mostly by pressing the back button,
+        // so we don't display an error message here.
+        if (uri == null) return@registerForActivityResult
+        val selectedRef = selectedRef
+        if (selectedRef != null) {
+            AssetManager.default().loadAssetRaw(selectedRef).onSuccess {
+                Timber.i(it)
+                ExternalContentUtils.writeTextToUri(this, uri, it).onSuccess {
+                    showMessage(R.string.settings__theme_manager__theme_export_success)
+                }.onFailure {
+                    showError(it)
+                }
+            }.onFailure {
+                showError(it)
+            }
+        } else {
+            showError(NullPointerException("selectedRef is null!"))
+        }
+    }
+
+    companion object {
         const val EXTRA_KEY: String = "key"
         const val EXTRA_DEFAULT_VALUE: String = "default_value"
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {
-        prefs = PrefHelper.getDefaultInstance(this)
-
         super.onCreate(savedInstanceState)
-        binding = ThemeManagerActivityBinding.inflate(layoutInflater)
-        setContentView(binding.root)
 
         key = intent.getStringExtra(EXTRA_KEY) ?: ""
         defaultValue = intent.getStringExtra(EXTRA_DEFAULT_VALUE) ?: ""
@@ -91,8 +142,10 @@ class ThemeManagerActivity : AppCompatActivity() {
 
         binding.fabOptionCreateEmpty.setOnClickListener { onActionClicked(it) }
         binding.fabOptionCreateFromSelected.setOnClickListener { onActionClicked(it) }
+        binding.fabOptionImport.setOnClickListener { onActionClicked(it) }
         binding.themeDeleteBtn.setOnClickListener { onActionClicked(it) }
         binding.themeEditBtn.setOnClickListener { onActionClicked(it) }
+        binding.themeExportBtn.setOnClickListener { onActionClicked(it) }
 
         layoutManager = LayoutManager(this).apply {
             preloadComputedLayout(KeyboardMode.CHARACTERS, Subtype.DEFAULT, prefs)
@@ -101,6 +154,10 @@ class ThemeManagerActivity : AppCompatActivity() {
         buildUi()
     }
 
+    override fun onCreateBinding(): ThemeManagerActivityBinding {
+        return ThemeManagerActivityBinding.inflate(layoutInflater)
+    }
+
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
             android.R.id.home -> {
@@ -132,7 +189,7 @@ class ThemeManagerActivity : AppCompatActivity() {
                     PrefHelper.Theme.NIGHT_THEME_REF -> prefs.theme.nightThemeRef
                     else -> ""
                 }
-            ).getOr(null)
+            ).getOrDefault(null)
         }
     }
 
@@ -177,15 +234,6 @@ class ThemeManagerActivity : AppCompatActivity() {
         }
     }
 
-    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
-        if (requestCode == EDITOR_REQ_CODE) {
-            themeManager.update()
-            buildUi()
-        } else {
-            super.onActivityResult(requestCode, resultCode, data)
-        }
-    }
-
     fun onActionClicked(view: View) {
         when (view.id) {
             R.id.fab_option_create_empty -> {
@@ -202,9 +250,11 @@ class ThemeManagerActivity : AppCompatActivity() {
                         ThemeManager.THEME_PATH_REL + "/" + newTheme.name + ".json"
                     )
                 themeManager.writeTheme(newAssetRef, newTheme).onSuccess {
-                    startActivityForResult(Intent(this, ThemeEditorActivity::class.java).apply {
-                        putExtra(ThemeEditorActivity.EXTRA_THEME_REF, newAssetRef.toString())
-                    }, EDITOR_REQ_CODE)
+                    themeEditor.launch(
+                        Intent(this, ThemeEditorActivity::class.java).apply {
+                            putExtra(ThemeEditorActivity.EXTRA_THEME_REF, newAssetRef.toString())
+                        }
+                    )
                 }.onFailure {
                     Timber.e(it.toString())
                 }
@@ -227,16 +277,18 @@ class ThemeManagerActivity : AppCompatActivity() {
                         ThemeManager.THEME_PATH_REL + "/" + themeCopy.name + ".json"
                     )
                 themeManager.writeTheme(newAssetRef, themeCopy).onSuccess {
-                    startActivityForResult(Intent(this, ThemeEditorActivity::class.java).apply {
-                        putExtra(ThemeEditorActivity.EXTRA_THEME_REF, newAssetRef.toString())
-                    }, EDITOR_REQ_CODE)
+                    themeEditor.launch(
+                        Intent(this, ThemeEditorActivity::class.java).apply {
+                            putExtra(ThemeEditorActivity.EXTRA_THEME_REF, newAssetRef.toString())
+                        }
+                    )
                 }.onFailure {
                     Timber.e(it.toString())
                 }
             }
-            /*R.id.fab_option_import -> {
-                Toast.makeText(this, "Import not yet implemented", Toast.LENGTH_SHORT).show()
-            }*/
+            R.id.fab_option_import -> {
+                importTheme.launch("*/*")
+            }
             R.id.theme_delete_btn -> {
                 val deleteRef = selectedRef?.copy()
                 if (deleteRef?.source == AssetSource.Internal) {
@@ -273,9 +325,11 @@ class ThemeManagerActivity : AppCompatActivity() {
             R.id.theme_edit_btn -> {
                 val editRef = selectedRef
                 if (editRef?.source == AssetSource.Internal) {
-                    startActivityForResult(Intent(this, ThemeEditorActivity::class.java).apply {
-                        putExtra(ThemeEditorActivity.EXTRA_THEME_REF, editRef.toString())
-                    }, EDITOR_REQ_CODE)
+                    themeEditor.launch(
+                        Intent(this, ThemeEditorActivity::class.java).apply {
+                            putExtra(ThemeEditorActivity.EXTRA_THEME_REF, editRef.toString())
+                        }
+                    )
                 } else {
                     // This toast normally should never show, though if the edit button is enabled
                     // even if it shouldn't, just show a toast so the user knows the app is
@@ -287,6 +341,9 @@ class ThemeManagerActivity : AppCompatActivity() {
                     ).show()
                 }
             }
+            R.id.theme_export_btn -> {
+                exportTheme.launch("${selectedTheme.name}.json")
+            }
         }
     }
 

app/src/main/java/dev/patrickgold/florisboard/settings/components/DialogSeekBarPreference.kt

@@ -22,6 +22,8 @@ import android.util.AttributeSet
 import android.view.LayoutInflater
 import android.widget.SeekBar
 import androidx.preference.Preference
+import androidx.preference.Preference.OnPreferenceChangeListener
+import androidx.preference.Preference.OnPreferenceClickListener
 import androidx.preference.PreferenceManager
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.databinding.SeekBarDialogBinding
@@ -161,4 +163,4 @@ class DialogSeekBarPreference : Preference {
     private fun seekBarProgressToActualValue(progress: Int): Int {
         return (progress * step) + min
     }
-}
+}

app/src/main/java/dev/patrickgold/florisboard/settings/components/ThemeSelectorPreference.kt

@@ -22,8 +22,8 @@ import android.content.Intent
 import android.content.SharedPreferences
 import android.util.AttributeSet
 import androidx.preference.Preference
+import androidx.preference.Preference.OnPreferenceClickListener
 import androidx.preference.PreferenceManager
-import com.github.michaelbull.result.onSuccess
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.core.PrefHelper
 import dev.patrickgold.florisboard.ime.extension.AssetRef
@@ -104,4 +104,4 @@ class ThemeSelectorPreference : Preference, SharedPreferences.OnSharedPreference
         i.putExtra(ThemeManagerActivity.EXTRA_DEFAULT_VALUE, defaultValue)
         context.startActivity(i)
     }
-}
+}

app/src/main/java/dev/patrickgold/florisboard/settings/components/TimePickerDialogPreference.kt

@@ -20,6 +20,8 @@ import android.app.TimePickerDialog
 import android.content.Context
 import android.util.AttributeSet
 import androidx.preference.Preference
+import androidx.preference.Preference.OnPreferenceChangeListener
+import androidx.preference.Preference.OnPreferenceClickListener
 import androidx.preference.PreferenceManager
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.util.TimeUtil
@@ -82,4 +84,4 @@ class TimePickerDialogPreference : Preference {
         }, time.hour, time.minute, true)
         timePickerDialog.show()
     }
-}
+}

app/src/main/java/dev/patrickgold/florisboard/settings/fragments/KeyboardFragment.kt

@@ -23,11 +23,13 @@ import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.PreferenceManager
 import dev.patrickgold.florisboard.R
 import dev.patrickgold.florisboard.ime.core.PrefHelper
+import dev.patrickgold.florisboard.ime.onehanded.OneHandedMode
 import dev.patrickgold.florisboard.settings.components.DialogSeekBarPreference
 
 class KeyboardFragment : PreferenceFragmentCompat(),
     SharedPreferences.OnSharedPreferenceChangeListener {
     private var heightFactorCustom: DialogSeekBarPreference? = null
+    private var oneHandedModeScaleFactor: DialogSeekBarPreference? = null
     private var utilityKeyAction: ListPreference? = null
     private var sharedPrefs: SharedPreferences? = null
 
@@ -36,8 +38,10 @@ class KeyboardFragment : PreferenceFragmentCompat(),
         sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context)
 
         heightFactorCustom = findPreference(PrefHelper.Keyboard.HEIGHT_FACTOR_CUSTOM)
+        oneHandedModeScaleFactor = findPreference(PrefHelper.Keyboard.ONE_HANDED_MODE_SCALE_FACTOR)
         utilityKeyAction = findPreference(PrefHelper.Keyboard.UTILITY_KEY_ACTION)
         onSharedPreferenceChanged(null, PrefHelper.Keyboard.HEIGHT_FACTOR)
+        onSharedPreferenceChanged(null, PrefHelper.Keyboard.ONE_HANDED_MODE)
         onSharedPreferenceChanged(null, PrefHelper.Keyboard.UTILITY_KEY_ENABLED)
     }
 
@@ -52,10 +56,16 @@ class KeyboardFragment : PreferenceFragmentCompat(),
     }
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
-        if (key == PrefHelper.Keyboard.HEIGHT_FACTOR) {
-            heightFactorCustom?.isVisible = sharedPrefs?.getString(key, "") == "custom"
-        } else if (key == PrefHelper.Keyboard.UTILITY_KEY_ENABLED) {
-            utilityKeyAction?.isVisible = sharedPrefs?.getBoolean(key, false) == true
+        when (key) {
+            PrefHelper.Keyboard.HEIGHT_FACTOR -> {
+                heightFactorCustom?.isVisible = sharedPrefs?.getString(key, "") == "custom"
+            }
+            PrefHelper.Keyboard.ONE_HANDED_MODE -> {
+                oneHandedModeScaleFactor?.isEnabled = sharedPrefs?.getString(key, "") != OneHandedMode.OFF
+            }
+            PrefHelper.Keyboard.UTILITY_KEY_ENABLED -> {
+                utilityKeyAction?.isVisible = sharedPrefs?.getBoolean(key, false) == true
+            }
         }
     }
 }

app/src/main/java/dev/patrickgold/florisboard/setup/EnableImeFragment.kt

@@ -33,7 +33,7 @@ class EnableImeFragment : Fragment() {
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
-    ): View? {
+    ): View {
         binding = SetupFragmentEnableImeBinding.inflate(inflater, container, false)
         binding.languageAndInputButton.setOnClickListener {
             val intent = Intent()

app/src/main/java/dev/patrickgold/florisboard/setup/FinishFragment.kt

@@ -22,7 +22,6 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import dev.patrickgold.florisboard.databinding.SetupFragmentFinishBinding
-import dev.patrickgold.florisboard.ime.theme.Theme
 
 class FinishFragment : Fragment() {
     private lateinit var binding: SetupFragmentFinishBinding
@@ -31,7 +30,7 @@ class FinishFragment : Fragment() {
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
-    ): View? {
+    ): View {
         binding = SetupFragmentFinishBinding.inflate(inflater, container, false)
 
         // Set theme to floris_day

app/src/main/java/dev/patrickgold/florisboard/util/AppVersionUtils.kt

@@ -18,7 +18,6 @@ package dev.patrickgold.florisboard.util
 
 import android.content.Context
 import dev.patrickgold.florisboard.ime.core.PrefHelper
-import java.lang.Exception
 
 object AppVersionUtils {
     fun getRawVersionName(context: Context): String {
@@ -69,12 +68,12 @@ data class VersionName(
                 if (list.size == 3) {
                     return VersionName(list[0], list[1], list[2])
                 }
-            } else if (raw.matches("""[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+""".toRegex())) {
+            } else if (raw.matches("""[0-9]+[.][0-9]+[.][0-9]+[-][0-9]+""".toRegex())) {
                 val list = raw.split(".").map { it.toInt() }
                 if (list.size == 4) {
                     return VersionName(list[0], list[1], list[2], null, list[3])
                 }
-            } else if (raw.matches("""[0-9]+[.][0-9]+[.][0-9]+[.][a-zA-Z]+""".toRegex())) {
+            } else if (raw.matches("""[0-9]+[.][0-9]+[.][0-9]+[-][a-zA-Z]+""".toRegex())) {
                 val list = raw.split(".")
                 if (list.size == 4) {
                     return VersionName(
@@ -82,7 +81,7 @@ data class VersionName(
                         list[3], null
                     )
                 }
-            } else if (raw.matches("""[0-9]+[.][0-9]+[.][0-9]+[.][a-zA-Z]+[0-9]+""".toRegex())) {
+            } else if (raw.matches("""[0-9]+[.][0-9]+[.][0-9]+[-][a-zA-Z]+[0-9]+""".toRegex())) {
                 val list = raw.split(".")
                 if (list.size == 4) {
                     val extraName = list[3].split("""[0-9]+""".toRegex())[0]

app/src/main/java/dev/patrickgold/florisboard/util/LocaleUtils.kt

@@ -35,7 +35,7 @@ object LocaleUtils {
         }
     }
 
-    class JsonAdapter() {
+    class JsonAdapter {
         @FromJson
         fun fromJson(raw: String): Locale {
             return stringToLocale(raw)

app/src/main/res/drawable/ic_assignment.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="?android:attr/textColorPrimary" android:pathData="M7 15h7v2H7zm0-4h10v2H7zm0-4h10v2H7zm12-4h-4.18C14.4 1.84 13.3 1 12 1c-1.3 0-2.4.84-2.82 2H5c-.14 0-.27.01-.4.04-.39.08-.74.28-1.01.55-.18.18-.33.4-.43.64-.1.23-.16.49-.16.77v14c0 .27.06.54.16.78s.25.45.43.64c.27.27.62.47 1.01.55.13.02.26.03.4.03h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm-7-.25c.41 0 .75.34.75.75s-.34.75-.75.75-.75-.34-.75-.75.34-.75.75-.75zM19 19H5V5h14v14z"/>
+</vector>

app/src/main/res/drawable/ic_clear_all.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="?android:attr/textColorPrimary" android:pathData="M5 13h14v-2H5v2zm-2 4h14v-2H3v2zM7 7v2h14V7H7z"/>
+</vector>

app/src/main/res/drawable/ic_pin.xml

@@ -0,0 +1,6 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp" android:height="24dp"
+    android:viewportWidth="24" android:viewportHeight="24"
+    android:autoMirrored="true">
+    <path android:fillColor="?android:attr/textColorPrimary" android:pathData="M14,4v5c0,1.12,0.37,2.16,1,3H9c0.65-0.86,1-1.9,1-3V4H14 M17,2H7C6.45,2,6,2.45,6,3c0,0.55,0.45,1,1,1c0,0,0,0,0,0l1,0v5 c0,1.66-1.34,3-3,3v2h5.97v7l1,1l1-1v-7H19v-2c0,0,0,0,0,0c-1.66,0-3-1.34-3-3V4l1,0c0,0,0,0,0,0c0.55,0,1-0.45,1-1 C18,2.45,17.55,2,17,2L17,2z"/>
+</vector>

app/src/main/res/drawable/ic_share.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="?android:attr/textColorPrimary" android:pathData="M18,16.08c-0.76,0 -1.44,0.3 -1.96,0.77L8.91,12.7c0.05,-0.23 0.09,-0.46 0.09,-0.7s-0.04,-0.47 -0.09,-0.7l7.05,-4.11c0.54,0.5 1.25,0.81 2.04,0.81 1.66,0 3,-1.34 3,-3s-1.34,-3 -3,-3 -3,1.34 -3,3c0,0.24 0.04,0.47 0.09,0.7L8.04,9.81C7.5,9.31 6.79,9 6,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3c0.79,0 1.5,-0.31 2.04,-0.81l7.12,4.16c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.61 1.31,2.92 2.92,2.92 1.61,0 2.92,-1.31 2.92,-2.92s-1.31,-2.92 -2.92,-2.92z"/>
+</vector>

app/src/main/res/drawable/shape_rect_rounded_3.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Bottom 2dp Shadow -->
+    <item>
+        <shape  android:shape="rectangle">
+
+            <solid android:color="@color/cardview_shadow_start_color" />
+            <corners android:radius="7dp" />
+
+        </shape>
+    </item>
+
+    <!-- White Top color -->
+    <item android:right="3px" android:bottom="5px">
+
+        <shape  android:shape="rectangle">
+            <corners android:radius="7dp" />
+
+        </shape>
+
+    </item>
+
+</layer-list>

app/src/main/res/layout/about_activity.xml

@@ -20,11 +20,12 @@
 
             <ImageView
                 android:id="@+id/app_icon"
-                android:src="@mipmap/ic_launcher"
+                android:background="@mipmap/floris_app_icon"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:paddingTop="16dp"
-                android:paddingBottom="8dp"
+                android:layout_marginTop="24dp"
+                android:layout_marginBottom="8dp"
+                android:elevation="8dp"
                 android:contentDescription="@string/about__app_icon_content_description"/>
 
             <TextView

app/src/main/res/layout/clip_popup_layout.xml

@@ -0,0 +1,105 @@
+<?xml version="1.0" encoding="utf-8"?>
+<dev.patrickgold.florisboard.ime.clip.ClipboardPopupView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="10dp"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:id="@+id/pin_clip_item"
+        android:orientation="horizontal"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:id="@+id/pin_clip_item_icon"
+            android:layout_width="wrap_content"
+            android:scaleX="0.8"
+            android:scaleY="0.8"
+            android:layout_height="wrap_content"
+            android:src="@drawable/ic_pin"
+            android:contentDescription="@string/clip__pin_item" />
+
+        <Space
+            android:layout_width="10dp"
+            android:layout_height="0dp"/>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/clip__pin_item"
+            android:id="@+id/pin_clip_item_text"
+            tools:layout_editor_absoluteY="3dp" />
+
+
+    </LinearLayout>
+
+    <Space
+        android:layout_width="0dp"
+        android:layout_height="10dp"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:id="@+id/remove_from_history"
+        android:orientation="horizontal"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:id="@+id/remove_from_history_icon"
+            android:layout_width="wrap_content"
+            android:scaleX="0.8"
+            android:scaleY="0.8"
+            android:layout_height="wrap_content"
+            android:src="@drawable/ic_delete"
+            android:contentDescription="@string/clip__delete_item" />
+
+        <Space
+            android:layout_width="10dp"
+            android:layout_height="0dp"/>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/clip__delete_item"
+            android:id="@+id/remove_from_history_text"
+            tools:layout_editor_absoluteY="3dp" />
+
+
+    </LinearLayout>
+
+    <Space
+        android:id="@+id/paste_clip_item_space"
+        android:layout_width="0dp"
+        android:layout_height="10dp"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:id="@+id/paste_clip_item"
+        android:orientation="horizontal"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:id="@+id/paste_clip_item_icon"
+            android:layout_width="wrap_content"
+            android:scaleX="0.8"
+            android:scaleY="0.8"
+            android:layout_height="wrap_content"
+            android:src="@drawable/ic_content_paste"
+            android:contentDescription="@string/clip__paste_item" />
+
+        <Space
+            android:layout_width="10dp"
+            android:layout_height="0dp"/>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/clip__paste_item"
+            android:id="@+id/paste_clip_item_text"
+            tools:layout_editor_absoluteY="3dp" />
+
+
+    </LinearLayout>
+
+</dev.patrickgold.florisboard.ime.clip.ClipboardPopupView>

app/src/main/res/layout/clipboard_history_item_image.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<dev.patrickgold.florisboard.ime.clip.ClipboardHistoryItemView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="5dp"
+    android:padding="0dp"
+    android:background="@drawable/shape_rect_rounded_3"
+    android:foreground="?selectableItemBackground"
+    >
+
+    <ImageView
+        android:id="@+id/clipboard_history_item_img"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:adjustViewBounds="true"
+        android:layout_marginEnd="0dp"
+        android:padding="0dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        android:background="@drawable/shape_rect_rounded_3"
+        tools:ignore="ContentDescription" />
+
+    <ImageView
+        android:id="@+id/clipboard_pin"
+        android:layout_width="15dp"
+        android:layout_height="15dp"
+        android:layout_marginEnd="5dp"
+        android:layout_marginTop="5dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        android:src="@drawable/ic_pin"
+        android:contentDescription="@string/clip__pin_item"/>
+
+</dev.patrickgold.florisboard.ime.clip.ClipboardHistoryItemView>

app/src/main/res/layout/clipboard_history_item_text.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<dev.patrickgold.florisboard.ime.clip.ClipboardHistoryItemView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="5dp"
+    android:padding="5dp"
+    android:foreground="?selectableItemBackground"
+    android:background="@drawable/shape_rect_rounded_3"
+    >
+
+    <TextView
+        android:id="@+id/clipboard_history_item_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="25dp"
+        android:padding="6dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="A clipboard item would go here." />
+
+    <ImageView
+        android:id="@+id/clipboard_pin"
+        android:layout_width="15dp"
+        android:layout_height="15dp"
+        android:layout_marginEnd="5dp"
+        android:layout_marginTop="5dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        android:src="@drawable/ic_pin"
+        android:contentDescription="@string/clip__pin_item"/>
+
+</dev.patrickgold.florisboard.ime.clip.ClipboardHistoryItemView>

app/src/main/res/layout/clipboard_layout.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<dev.patrickgold.florisboard.ime.clip.ClipboardHistoryView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/clip_input"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <LinearLayout
+            android:id="@+id/clipboard_bar"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <ImageButton
+                android:id="@+id/back_to_keyboard_button"
+                android:layout_width="@dimen/clipboard_button_width"
+                android:layout_height="@dimen/clipboard_button_height"
+                android:layout_gravity="center_vertical"
+                android:background="@drawable/button_transparent_bg_on_press"
+                android:hapticFeedbackEnabled="false"
+                android:soundEffectsEnabled="false"
+                android:layout_weight="0"
+                android:src="@drawable/ic_arrow_back"
+                android:contentDescription="@string/clip__back_to_text_input" />
+
+            <TextView
+                android:id="@+id/clipboard_text"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:gravity="center_vertical"
+                android:layout_weight="1"
+                android:text="@string/clip__context_header"
+                android:textSize="15sp" />
+
+            <ImageButton
+                android:id="@+id/clear_clipboard_history"
+                android:layout_width="@dimen/clipboard_button_width"
+                android:layout_height="@dimen/clipboard_button_height"
+                android:layout_gravity="center_vertical"
+                android:background="@drawable/button_transparent_bg_on_press"
+                android:hapticFeedbackEnabled="false"
+                android:soundEffectsEnabled="false"
+                android:layout_weight="0"
+                android:src="@drawable/ic_clear_all"
+                android:contentDescription="@string/clip__clear_history" />
+
+        </LinearLayout>
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:id="@+id/clipboard_history_items"
+            android:paddingLeft="5dp"
+            android:paddingRight="5dp"
+            />
+    </LinearLayout>
+
+</dev.patrickgold.florisboard.ime.clip.ClipboardHistoryView>

app/src/main/res/layout/editing_layout.xml

@@ -15,7 +15,7 @@
         app:layout_constraintHeight_percent="0.75"
         app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintBottom_toTopOf="@+id/move_home"
+        app:layout_constraintBottom_toTopOf="@+id/move_start_of_line"
         android:src="@drawable/ic_keyboard_arrow_left"/>
 
     <dev.patrickgold.florisboard.ime.text.editing.EditingKeyView
@@ -51,12 +51,12 @@
         app:layout_constraintWidth_percent="0.2"
         app:layout_constraintHeight_percent="0.75"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintBottom_toTopOf="@+id/move_end"
+        app:layout_constraintBottom_toTopOf="@+id/move_end_of_line"
         app:layout_constraintLeft_toRightOf="@+id/select"
         android:src="@drawable/ic_keyboard_arrow_right"/>
 
     <dev.patrickgold.florisboard.ime.text.editing.EditingKeyView
-        android:id="@+id/move_home"
+        android:id="@+id/move_start_of_line"
         style="@style/TextEditingButton"
         app:layout_constraintWidth_percent="0.35"
         app:layout_constraintHeight_percent="0.25"
@@ -65,11 +65,11 @@
         android:src="@drawable/ic_first_page"/>
 
     <dev.patrickgold.florisboard.ime.text.editing.EditingKeyView
-        android:id="@+id/move_end"
+        android:id="@+id/move_end_of_line"
         style="@style/TextEditingButton"
         app:layout_constraintWidth_percent="0.35"
         app:layout_constraintHeight_percent="0.25"
-        app:layout_constraintLeft_toRightOf="@+id/move_home"
+        app:layout_constraintLeft_toRightOf="@+id/move_start_of_line"
         app:layout_constraintBottom_toBottomOf="parent"
         android:src="@drawable/ic_last_page"/>
 
@@ -131,7 +131,7 @@
         app:layout_constraintHeight_percent="0.25"
         app:layout_constraintTop_toBottomOf="@+id/clipboard_paste"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toRightOf="@+id/move_end"
+        app:layout_constraintLeft_toRightOf="@+id/move_end_of_line"
         app:layout_constraintRight_toRightOf="parent"
         android:src="@drawable/ic_backspace"/>
 

app/src/main/res/layout/florisboard.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <dev.patrickgold.florisboard.ime.core.InputWindowView
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/florisboard"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
@@ -18,29 +19,32 @@
         android:background="?inputView_bgColorFallback"
         android:baselineAligned="false">
 
-        <LinearLayout
+        <dev.patrickgold.florisboard.ime.onehanded.OneHandedPanel
             android:id="@+id/one_handed_ctrl_panel_start"
-            style="@style/OneHandedPanel"
-            android:visibility="gone">
+            android:layout_width="@dimen/one_handed_width"
+            android:layout_height="match_parent"
+            android:layout_weight="0"
+            android:visibility="gone"
+            app:panelSide="start">
 
             <ImageButton
-                android:id="@+id/one_handed_ctrl_close_start"
-                style="@style/OneHandedPanelButton"
-                android:src="@drawable/ic_zoom_out_map"
-                android:contentDescription="@string/one_handed__close_btn_content_description"/>
-
-            <View
+                android:tag="one_handed_ctrl_close"
                 android:layout_width="match_parent"
                 android:layout_height="@dimen/one_handed_button_height"
-                android:visibility="invisible"/>
+                android:layout_marginBottom="@dimen/one_handed_button_height"
+                android:src="@drawable/ic_zoom_out_map"
+                android:background="@drawable/button_transparent_bg_on_press"
+                android:contentDescription="@string/one_handed__close_btn_content_description"/>
 
             <ImageButton
-                android:id="@+id/one_handed_ctrl_move_start"
-                style="@style/OneHandedPanelButton"
+                android:tag="one_handed_ctrl_move"
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/one_handed_button_height"
                 android:src="@drawable/ic_keyboard_arrow_left"
+                android:background="@drawable/button_transparent_bg_on_press"
                 android:contentDescription="@string/one_handed__move_start_btn_content_description"/>
 
-        </LinearLayout>
+        </dev.patrickgold.florisboard.ime.onehanded.OneHandedPanel>
 
         <dev.patrickgold.florisboard.ime.core.FlorisViewFlipper
             android:id="@+id/main_view_flipper"
@@ -53,31 +57,36 @@
 
             <include layout="@layout/media_input_layout"/>
 
+            <include layout="@layout/clipboard_layout"/>
+
         </dev.patrickgold.florisboard.ime.core.FlorisViewFlipper>
 
-        <LinearLayout
+        <dev.patrickgold.florisboard.ime.onehanded.OneHandedPanel
             android:id="@+id/one_handed_ctrl_panel_end"
-            style="@style/OneHandedPanel"
-            android:visibility="gone">
+            android:layout_width="@dimen/one_handed_width"
+            android:layout_height="match_parent"
+            android:layout_weight="0"
+            android:visibility="gone"
+            app:panelSide="end">
 
             <ImageButton
-                android:id="@+id/one_handed_ctrl_close_end"
-                style="@style/OneHandedPanelButton"
-                android:src="@drawable/ic_zoom_out_map"
-                android:contentDescription="@string/one_handed__close_btn_content_description"/>
-
-            <View
+                android:tag="one_handed_ctrl_close"
                 android:layout_width="match_parent"
                 android:layout_height="@dimen/one_handed_button_height"
-                android:visibility="invisible"/>
+                android:layout_marginBottom="@dimen/one_handed_button_height"
+                android:src="@drawable/ic_zoom_out_map"
+                android:background="@drawable/button_transparent_bg_on_press"
+                android:contentDescription="@string/one_handed__close_btn_content_description"/>
 
             <ImageButton
-                android:id="@+id/one_handed_ctrl_move_end"
-                style="@style/OneHandedPanelButton"
+                android:tag="one_handed_ctrl_move"
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/one_handed_button_height"
                 android:src="@drawable/ic_keyboard_arrow_right"
-                android:contentDescription="@string/one_handed__move_end_btn_content_description"/>
+                android:background="@drawable/button_transparent_bg_on_press"
+                android:contentDescription="@string/one_handed__move_start_btn_content_description"/>
 
-        </LinearLayout>
+        </dev.patrickgold.florisboard.ime.onehanded.OneHandedPanel>
 
     </dev.patrickgold.florisboard.ime.core.InputView>
 

app/src/main/res/layout/settings_fragment_home.xml

@@ -39,6 +39,16 @@
 
     </androidx.cardview.widget.CardView>
 
+    <androidx.cardview.widget.CardView
+        style="@style/SettingsCardView">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="This version includes experimental support for composing suggestions, currently regardless of your selected subtype the language is English (US). Note that currently only suggestions are displayed if at least one character of a word is typed in. Next-word suggestions are planned for the next version. If you want to give feedback on this feature, you can do so on the GitHub repository, feedback is always highly appreciated :)"/>
+
+    </androidx.cardview.widget.CardView>
+
     <androidx.cardview.widget.CardView
         style="@style/SettingsCardView">
 

app/src/main/res/layout/smartbar.xml

@@ -45,22 +45,19 @@
 
             <Button
                 android:id="@+id/candidate0"
-                style="@style/SmartbarCandidate"
-                android:text="suggestions"/>
+                style="@style/SmartbarCandidate"/>
 
             <View style="@style/SmartbarDivider"/>
 
             <Button
                 android:id="@+id/candidate1"
-                style="@style/SmartbarCandidate"
-                android:text="not yet"/>
+                style="@style/SmartbarCandidate"/>
 
             <View style="@style/SmartbarDivider"/>
 
             <Button
                 android:id="@+id/candidate2"
-                style="@style/SmartbarCandidate"
-                android:text="implemented"/>
+                style="@style/SmartbarCandidate"/>
 
         </LinearLayout>