Improve pattern layout for tiiiny screens

On small screens < sw400dp,
- Don't show icon
- Don't show "Screen lock options" button

Test: cd tests/robotests && mma
Bug: 72764729
Change-Id: I8d9863d43c877fcc18f504d91d3183760b3fafc2

res/layout/choose_lock_pattern_common.xml

@@ -42,7 +42,7 @@
 
             <ImageView
                 android:id="@+id/suw_layout_icon"
-                style="@style/LockPatternIconStyle"
+                style="@style/SuwGlifIcon"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:src="@drawable/ic_lock" />
@@ -73,6 +73,7 @@
                 style="@style/SuwDescription.Glif"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
+                android:layout_marginHorizontal="?attr/suwMarginSides"
                 android:minLines="2" />
 
             <TextView android:id="@+id/headerText"

res/layout/confirm_lock_pattern_internal_base.xml

@@ -34,7 +34,7 @@
 
             <ImageView
                 android:id="@+id/suw_layout_icon"
-                style="@style/LockPatternIconStyle"
+                style="@style/SuwGlifIcon"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="?attr/suwGlifHeaderGravity"

res/values-sw400dp/config.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-    Copyright (C) 2017 The Android Open Source Project
+    Copyright (C) 2018 Google Inc.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -17,7 +17,9 @@
 
 <resources>
 
-    <!-- Unhide the icon on bigger screens -->
+    <!-- Whether to use a UI variant that minimizes the number of UI elements on screen. This is
-    <style name="LockPatternIconStyle" parent="SuwGlifIcon" />
+         typically used when there is not enough space to display everything, because pattern view
+         doesn't interact well with scroll view -->
+    <bool name="config_lock_pattern_minimal_ui">false</bool>
 
 </resources>

res/values/config.xml

@@ -122,4 +122,10 @@
 
     <!-- Whether or not new device intro suggestion is supported for this device -->
     <bool name="config_new_device_intro_suggestion_supported">false</bool>
+
+    <!-- Whether to use a UI variant that minimizes the number of UI elements on screen. This is
+         typically used when there is not enough space to display everything, because pattern view
+         doesn't interact well with scroll view -->
+    <bool name="config_lock_pattern_minimal_ui">true</bool>
+
 </resources>

res/values/styles.xml

@@ -457,11 +457,6 @@
         <item name="*android:successColor">@color/setup_lock_pattern_view_success_color_light</item>
     </style>
 
-    <!-- Overridden in sw400dp -->
-    <style name="LockPatternIconStyle" parent="SuwGlifIcon">
-        <item name="android:visibility">gone</item>
-    </style>
-
     <style name="SuggestionConditionStyle">
         <item name="android:background">@color/suggestion_condition_background</item>
     </style>

src/com/android/settings/password/ChooseLockPattern.java

@@ -452,9 +452,16 @@ public class ChooseLockPattern extends SettingsActivity {
             final GlifLayout layout = (GlifLayout) inflater.inflate(
                     R.layout.choose_lock_pattern, container, false);
             layout.setHeaderText(getActivity().getTitle());
+            if (getResources().getBoolean(R.bool.config_lock_pattern_minimal_ui)) {
+                View iconView = layout.findViewById(R.id.suw_layout_icon);
+                if (iconView != null) {
+                    iconView.setVisibility(View.GONE);
+                }
+            } else {
                 if (mForFingerprint) {
                     layout.setIcon(getActivity().getDrawable(R.drawable.ic_fingerprint_header));
                 }
+            }
             return layout;
         }
 

src/com/android/settings/password/SetupChooseLockPattern.java

@@ -57,12 +57,14 @@ public class SetupChooseLockPattern extends ChooseLockPattern {
         @Override
         public void onViewCreated(View view, Bundle savedInstanceState) {
             super.onViewCreated(view, savedInstanceState);
-            Button optionsButton = (Button) view.findViewById(R.id.screen_lock_options);
+            if (!getResources().getBoolean(R.bool.config_lock_pattern_minimal_ui)) {
+                Button optionsButton = view.findViewById(R.id.screen_lock_options);
                 optionsButton.setVisibility(View.VISIBLE);
                 optionsButton.setOnClickListener((btn) ->
                         ChooseLockTypeDialogFragment.newInstance(mUserId)
                                 .show(getChildFragmentManager(), null));
             }
+        }
 
         @Override
         public void onLockTypeSelected(ScreenLockType lock) {

tests/robotests/src/com/android/settings/password/ChooseLockPatternTest.java

@@ -22,6 +22,7 @@ import static org.robolectric.RuntimeEnvironment.application;
 
 import android.content.Intent;
 import android.os.UserHandle;
+import android.view.View;
 
 import com.android.settings.R;
 import com.android.settings.TestConfig;
@@ -102,15 +103,27 @@ public class ChooseLockPatternTest {
                 .isEqualTo(123);
     }
 
+    @Config(qualifiers = "sw400dp")
     @Test
-    public void assertThat_chooseLockIconChanged_WhenFingerprintExtraSet() {
+    public void fingerprintExtraSet_shouldDisplayFingerprintIcon() {
         ChooseLockPattern activity = createActivity(true);
         ChooseLockPatternFragment fragment = (ChooseLockPatternFragment)
                 activity.getFragmentManager().findFragmentById(R.id.main_content);
+
         ShadowDrawable drawable = Shadows.shadowOf(((GlifLayout) fragment.getView()).getIcon());
         assertThat(drawable.getCreatedFromResId()).isEqualTo(R.drawable.ic_fingerprint_header);
     }
 
+    @Test
+    public void smallScreens_shouldHideIcon() {
+        ChooseLockPattern activity = createActivity(true);
+        ChooseLockPatternFragment fragment = (ChooseLockPatternFragment)
+                activity.getFragmentManager().findFragmentById(R.id.main_content);
+
+        View iconView = fragment.getView().findViewById(R.id.suw_layout_icon);
+        assertThat(iconView.getVisibility()).isEqualTo(View.GONE);
+    }
+
     private ChooseLockPattern createActivity(boolean addFingerprintExtra) {
         return Robolectric.buildActivity(
                 ChooseLockPattern.class,

tests/robotests/src/com/android/settings/password/SetupChooseLockPatternTest.java

@@ -14,7 +14,7 @@
  * limitations under the License
  */
 
-package com.android.settings;
+package com.android.settings.password;
 
 import static com.google.common.truth.Truth.assertThat;
 
@@ -28,9 +28,11 @@ import android.os.UserHandle;
 import android.view.View;
 import android.widget.Button;
 
+import com.android.settings.R;
+import com.android.settings.SetupRedactionInterstitial;
+import com.android.settings.TestConfig;
 import com.android.settings.password.ChooseLockPattern.ChooseLockPatternFragment;
 import com.android.settings.password.ChooseLockPattern.IntentBuilder;
-import com.android.settings.password.SetupChooseLockPattern;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 import com.android.settings.testutils.shadow.SettingsShadowResources;
 import com.android.settings.testutils.shadow.SettingsShadowResourcesImpl;
@@ -89,8 +91,9 @@ public class SetupChooseLockPatternTest {
                 .isEqualTo(PackageManager.COMPONENT_ENABLED_STATE_ENABLED);
     }
 
+    @Config(qualifiers = "sw400dp")
     @Test
-    public void screenLockOptions_shouldBeVisible() {
+    public void sw400dp_shouldShowScreenLockOptions() {
         Button button = mActivity.findViewById(R.id.screen_lock_options);
         assertThat(button).isNotNull();
         assertThat(button.getVisibility()).isEqualTo(View.VISIBLE);
@@ -102,6 +105,13 @@ public class SetupChooseLockPatternTest {
         assertThat(count).named("List items shown").isEqualTo(3);
     }
 
+    @Test
+    public void smallScreens_shouldHideScreenLockOptions() {
+        Button button = mActivity.findViewById(R.id.screen_lock_options);
+        assertThat(button).isNotNull();
+        assertThat(button.getVisibility()).isEqualTo(View.GONE);
+    }
+
     @Test
     public void skipButton_shouldBeVisible_duringNonFingerprintFlow() {
         Button button = mActivity.findViewById(R.id.footerLeftButton);