Remove unused code

* isColorTransformAccelerated() already moved to ColorDisplayManager
* TurnScreenDarker fragment already moved to top level accessibility settings or TextAndDisplay fragment

Bug: 174829936
Test: manual test
Change-Id: I34ec6947129a5042d573e94eabe3c24c2fe761b5

src/com/android/settings/accessibility/AccessibilitySettings.java

@@ -84,10 +84,6 @@ public class AccessibilitySettings extends DashboardFragment {
             CATEGORY_INTERACTION_CONTROL, CATEGORY_DOWNLOADED_SERVICES
     };
 
-    // Preferences
-    private static final String DISPLAY_MAGNIFICATION_PREFERENCE_SCREEN =
-            "magnification_preference_screen";
-
     // Extras passed to sub-fragments.
     static final String EXTRA_PREFERENCE_KEY = "preference_key";
     static final String EXTRA_CHECKED = "checked";
@@ -155,19 +151,6 @@ public class AccessibilitySettings extends DashboardFragment {
     private final Map<ComponentName, PreferenceCategory> mPreBundledServiceComponentToCategoryMap =
             new ArrayMap<>();
 
-    private Preference mDisplayMagnificationPreferenceScreen;
-
-    /**
-     * Check if the color transforms are color accelerated. Some transforms are experimental only
-     * on non-accelerated platforms due to the performance implications.
-     *
-     * @param context The current context
-     */
-    public static boolean isColorTransformAccelerated(Context context) {
-        return context.getResources()
-                .getBoolean(com.android.internal.R.bool.config_setColorTransformAccelerated);
-    }
-
     public AccessibilitySettings() {
         // Observe changes to anything that the shortcut can toggle, so we can reflect updates
         final Collection<AccessibilityShortcutController.ToggleableFrameworkFeatureInfo> features =
@@ -305,10 +288,6 @@ public class AccessibilitySettings extends DashboardFragment {
             PreferenceCategory prefCategory = findPreference(CATEGORIES[i]);
             mCategoryToPrefCategoryMap.put(CATEGORIES[i], prefCategory);
         }
-
-        // Display magnification.
-        mDisplayMagnificationPreferenceScreen = findPreference(
-                DISPLAY_MAGNIFICATION_PREFERENCE_SCREEN);
     }
 
     private void updateAllPreferences() {
@@ -501,6 +480,7 @@ public class AccessibilitySettings extends DashboardFragment {
          *                          installed accessibility services
          * @return The list of {@link RestrictedPreference}
          */
+        @VisibleForTesting
         List<RestrictedPreference> createAccessibilityServicePreferenceList(
                 List<AccessibilityServiceInfo> installedServices) {
 
@@ -566,6 +546,7 @@ public class AccessibilitySettings extends DashboardFragment {
          *                           installed accessibility shortcuts
          * @return The list of {@link RestrictedPreference}
          */
+        @VisibleForTesting
         List<RestrictedPreference> createAccessibilityActivityPreferenceList(
                 List<AccessibilityShortcutInfo> installedShortcuts) {
             final Set<ComponentName> enabledServices =

src/com/android/settings/accessibility/TurnScreenDarkerFragment.java

@@ -1,110 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * 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 com.android.settings.accessibility;
-
-import android.app.settings.SettingsEnums;
-import android.content.Context;
-import android.hardware.display.ColorDisplayManager;
-import android.os.Bundle;
-import android.provider.Settings;
-
-import androidx.preference.Preference;
-import androidx.preference.PreferenceCategory;
-
-import com.android.settings.R;
-import com.android.settings.dashboard.DashboardFragment;
-import com.android.settings.display.DarkUIPreferenceController;
-import com.android.settings.search.BaseSearchIndexProvider;
-import com.android.settingslib.search.SearchIndexable;
-
-/** Accessibility settings for turning screen darker. */
-@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
-public class TurnScreenDarkerFragment extends DashboardFragment {
-
-    private static final String TAG = "TurnDarkerFragment";
-
-    private static final String CATEGORY_EXPERIMENTAL = "experimental_category";
-
-    // Preferences
-    private static final String TOGGLE_INVERSION_PREFERENCE = "toggle_inversion_preference";
-    private static final String DISPLAY_REDUCE_BRIGHT_COLORS_PREFERENCE_SCREEN =
-            "reduce_bright_colors_preference";
-
-    private Preference mToggleInversionPreference;
-    private Preference mReduceBrightColorsPreference;
-
-    @Override
-    public int getMetricsCategory() {
-        return SettingsEnums.ACCESSIBILITY_TURN_SCREEN_DARKER;
-    }
-
-
-    @Override
-    public void onCreate(Bundle icicle) {
-        super.onCreate(icicle);
-        initializeAllPreferences();
-        updateSystemPreferences();
-    }
-
-    @Override
-    public void onAttach(Context context) {
-        super.onAttach(context);
-        use(DarkUIPreferenceController.class).setParentFragment(this);
-    }
-
-    @Override
-    protected int getPreferenceScreenResId() {
-        return R.xml.accessibility_turn_screen_darker;
-    }
-
-    @Override
-    protected String getLogTag() {
-        return TAG;
-    }
-
-    private void initializeAllPreferences() {
-        // Display inversion.
-        mToggleInversionPreference = findPreference(TOGGLE_INVERSION_PREFERENCE);
-
-        // Reduce brightness.
-        mReduceBrightColorsPreference =
-                findPreference(DISPLAY_REDUCE_BRIGHT_COLORS_PREFERENCE_SCREEN);
-    }
-
-    /**
-     * Updates preferences related to system configurations.
-     */
-    private void updateSystemPreferences() {
-        final PreferenceCategory experimentalCategory = getPreferenceScreen().findPreference(
-                CATEGORY_EXPERIMENTAL);
-        if (ColorDisplayManager.isColorTransformAccelerated(getContext())) {
-            mToggleInversionPreference.setSummary(AccessibilityUtil.getSummary(
-                    getContext(), Settings.Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED));
-            getPreferenceScreen().removePreference(experimentalCategory);
-        } else {
-            // Move following preferences to experimental category if device don't supports HWC
-            // hardware-accelerated color transform.
-            getPreferenceScreen().removePreference(mToggleInversionPreference);
-            getPreferenceScreen().removePreference(mReduceBrightColorsPreference);
-            experimentalCategory.addPreference(mToggleInversionPreference);
-            experimentalCategory.addPreference(mReduceBrightColorsPreference);
-        }
-    }
-
-    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider(R.xml.accessibility_turn_screen_darker);
-}