From ed1a96816098bb6d686ecc1acd2191ff11d3da0f Mon Sep 17 00:00:00 2001
From: Tommy Webb <tommy@calyxinstitute.org>
Date: Wed, 20 Dec 2023 22:58:35 -0500
Subject: [PATCH] Revamp outro animation

Use the wallpaper as part of the window background rather than trying
to replicate it with WallpaperManager. This allows us to perform a
circular hide to whatever the wallpaper currently looks like exactly,
rather than needing to obtain the wallpaper Bitmap or Drawable and
guess. Display the Finish activity edge-to-edge. Fade out rather
than slide out.

Change-Id: I1154043178a04ca0ced7e8365e338dc10f3377cb
---
 AndroidManifest.xml                           |  1 +
 res/drawable/{reveal.xml => background.xml}   |  4 +-
 res/layout/finish_activity.xml                | 17 ++---
 res/values/styles.xml                         | 10 ++-
 .../lineageos/setupwizard/FinishActivity.java | 67 ++++++++++---------
 5 files changed, 58 insertions(+), 41 deletions(-)
 rename res/drawable/{reveal.xml => background.xml} (86%)

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 0675d0cd..a8f24ef1 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -292,6 +292,7 @@
         </activity>
 
         <activity android:name=".FinishActivity"
+                  android:theme="@style/EdgeToEdgeWallpaperBackground"
                   android:label="@string/activity_label_empty"
                   android:excludeFromRecents="true"
                   android:configChanges="mcc|mnc"
diff --git a/res/drawable/reveal.xml b/res/drawable/background.xml
similarity index 86%
rename from res/drawable/reveal.xml
rename to res/drawable/background.xml
index 015c1f24..2c5be642 100644
--- a/res/drawable/reveal.xml
+++ b/res/drawable/background.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-     Copyright (C) 2015 The CyanogenMod Project
+     Copyright (C) 2024 The LineageOS Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
@@ -15,5 +15,5 @@
      limitations under the License.
 -->
 <shape xmlns:android="http://schemas.android.com/apk/res/android" >
-    <solid android:color="@color/page_background" />
+    <solid android:color="?android:attr/colorBackground" />
 </shape>
diff --git a/res/layout/finish_activity.xml b/res/layout/finish_activity.xml
index 586e3f37..1b7855b2 100644
--- a/res/layout/finish_activity.xml
+++ b/res/layout/finish_activity.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
      Copyright (C) 2016 The CyanogenMod Project
-     Copyright (C) 2017-2021 The LineageOS Project
+     Copyright (C) 2017-2024 The LineageOS Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
@@ -25,7 +25,15 @@
     android:fitsSystemWindows="true"
     app:insetForeground="@android:color/transparent">
 
+    <ImageView
+        android:id="@+id/background"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@drawable/background"
+        android:visibility="visible"/>
+
     <LinearLayout
+        android:id="@+id/linear_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical"
@@ -49,11 +57,4 @@
 
     </LinearLayout>
 
-    <ImageView
-        android:id="@+id/reveal"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:background="@drawable/reveal"
-        android:visibility="invisible"/>
-
 </android.widget.FrameLayout>
diff --git a/res/values/styles.xml b/res/values/styles.xml
index f59b0a2b..10488179 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
      Copyright (C) 2013 The CyanogenMod Project
-     Copyright (C) 2017-2022 The LineageOS Project
+     Copyright (C) 2017-2024 The LineageOS Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
@@ -62,4 +62,12 @@
         <item name="android:paddingBottom">@dimen/welcome_title_padding_bottom</item>
         <item name="android:lineHeight">@dimen/welcome_title_line_height</item>
     </style>
+
+    <style name="EdgeToEdgeWallpaperBackground" parent="Theme.Setup">
+        <item name="android:windowShowWallpaper">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+        <item name="android:statusBarColor">?attr/android:windowBackground</item>
+        <item name="android:navigationBarColor">?attr/android:windowBackground</item>
+    </style>
 </resources>
diff --git a/src/org/lineageos/setupwizard/FinishActivity.java b/src/org/lineageos/setupwizard/FinishActivity.java
index 582be307..d88474ab 100644
--- a/src/org/lineageos/setupwizard/FinishActivity.java
+++ b/src/org/lineageos/setupwizard/FinishActivity.java
@@ -51,8 +51,14 @@ import android.os.UserHandle;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewAnimationUtils;
+import android.view.ViewGroup.MarginLayoutParams;
+import android.view.Window;
 import android.widget.ImageView;
 
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+
 import lineageos.providers.LineageSettings;
 
 import org.lineageos.setupwizard.util.SetupWizardUtils;
@@ -61,7 +67,7 @@ public class FinishActivity extends BaseSetupWizardActivity {
 
     public static final String TAG = FinishActivity.class.getSimpleName();
 
-    private ImageView mReveal;
+    private ImageView mBackground;
 
     private SetupWizardApp mSetupWizardApp;
 
@@ -85,12 +91,34 @@ public class FinishActivity extends BaseSetupWizardActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        overridePendingTransition(R.anim.translucent_enter, R.anim.translucent_exit);
         if (LOGV) {
             logActivityState("onCreate savedInstanceState=" + savedInstanceState);
         }
         mSetupWizardApp = (SetupWizardApp) getApplication();
-        mReveal = (ImageView) findViewById(R.id.reveal);
+        mBackground = (ImageView) findViewById(R.id.background);
         setNextText(R.string.start);
+
+        // Edge-to-edge. Needed for the background view to fill the full screen.
+        final Window window = getWindow();
+        window.setDecorFitsSystemWindows(false);
+
+        // Make sure 3-button navigation bar is the same color as the rest of the screen.
+        window.setNavigationBarContrastEnforced(false);
+
+        // Ensure the main layout (not including the background view) does not get obscured by bars.
+        final View rootView = findViewById(R.id.root);
+        ViewCompat.setOnApplyWindowInsetsListener(rootView, (view, windowInsets) -> {
+            final View linearLayout = findViewById(R.id.linear_layout);
+            final Insets insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars());
+            final MarginLayoutParams params = (MarginLayoutParams) linearLayout.getLayoutParams();
+            params.leftMargin = insets.left;
+            params.topMargin = insets.top;
+            params.rightMargin = insets.right;
+            params.bottomMargin = insets.bottom;
+            linearLayout.setLayoutParams(params);
+            return WindowInsetsCompat.CONSUMED;
+        });
     }
 
     @Override
@@ -122,47 +150,26 @@ public class FinishActivity extends BaseSetupWizardActivity {
         hideNextButton();
 
         // Begin outro animation.
-        setupRevealImage();
-    }
-
-    private void setupRevealImage() {
-        Rect rect = getWindowManager().getCurrentWindowMetrics().getBounds();
-        final Point p = new Point(rect.width(), rect.height());
-        final WallpaperManager wallpaperManager =
-                WallpaperManager.getInstance(this);
-        wallpaperManager.forgetLoadedWallpaper();
-        final Bitmap wallpaper = wallpaperManager.getBitmap();
-        Bitmap cropped = null;
-        if (wallpaper != null) {
-            cropped = Bitmap.createBitmap(wallpaper, 0,
-                    0, Math.min(p.x, wallpaper.getWidth()),
-                    Math.min(p.y, wallpaper.getHeight()));
-        }
-        if (cropped != null) {
-            mReveal.setScaleType(ImageView.ScaleType.CENTER_CROP);
-            mReveal.setImageBitmap(cropped);
-        } else {
-            mReveal.setBackground(wallpaperManager
-                    .getBuiltInDrawable(p.x, p.y, false, 0, 0));
-        }
         animateOut();
     }
 
     private void animateOut() {
-        int cx = (mReveal.getLeft() + mReveal.getRight()) / 2;
-        int cy = (mReveal.getTop() + mReveal.getBottom()) / 2;
-        int finalRadius = Math.max(mReveal.getWidth(), mReveal.getHeight());
+        final View rootView = findViewById(R.id.root);
+        final int cx = (rootView.getLeft() + rootView.getRight()) / 2;
+        final int cy = (rootView.getTop() + rootView.getBottom()) / 2;
+        final float fullRadius = (float) Math.hypot(cx, cy);
         Animator anim =
-                ViewAnimationUtils.createCircularReveal(mReveal, cx, cy, 0, finalRadius);
+                ViewAnimationUtils.createCircularReveal(rootView, cx, cy, fullRadius, 0f);
         anim.setDuration(900);
         anim.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
-                mReveal.setVisibility(View.VISIBLE);
+                rootView.setVisibility(View.VISIBLE);
             }
 
             @Override
             public void onAnimationEnd(Animator animation) {
+                rootView.setVisibility(View.INVISIBLE);
                 mHandler.post(() -> {
                     if (LOGV) {
                         Log.v(TAG, "Animation ended");