Merge "Add contrast setting in dev options" into udc-dev

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -19,6 +19,7 @@ package com.android.settings.development;
 import static android.service.quicksettings.TileService.ACTION_QS_TILE_PREFERENCES;
 
 import android.app.Activity;
+import android.app.UiModeManager;
 import android.app.settings.SettingsEnums;
 import android.bluetooth.BluetoothA2dp;
 import android.bluetooth.BluetoothAdapter;
@@ -63,6 +64,7 @@ import com.android.settings.development.storage.SharedDataPreferenceController;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.search.actionbar.SearchMenuController;
+import com.android.settings.theme.ContrastPreferenceController;
 import com.android.settings.widget.SettingsMainSwitchBar;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.lifecycle.Lifecycle;
@@ -685,6 +687,8 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new IngressRateLimitPreferenceController((context)));
         controllers.add(new BackAnimationPreferenceController(context, fragment));
         controllers.add(new PhantomProcessPreferenceController(context));
+        controllers.add(new ContrastPreferenceController(
+                context, context.getSystemService(UiModeManager.class)));
 
         return controllers;
     }

src/com/android/settings/theme/ContrastPreferenceController.kt

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2023 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.theme
+
+import android.app.UiModeManager
+import android.app.UiModeManager.ContrastUtils.CONTRAST_LEVEL_HIGH
+import android.app.UiModeManager.ContrastUtils.CONTRAST_LEVEL_MEDIUM
+import android.app.UiModeManager.ContrastUtils.toContrastLevel
+import android.content.Context
+import android.content.Intent
+import android.os.UserHandle
+import android.text.TextUtils
+import androidx.preference.Preference
+import com.android.internal.annotations.VisibleForTesting
+import com.android.settings.R
+import com.android.settings.core.BasePreferenceController
+
+/**
+ * Controller that opens the contrast dialog and updates the text describing the current contrast
+ */
+class ContrastPreferenceController(
+        private val context: Context,
+        private val uiModeManager: UiModeManager) : BasePreferenceController(context, KEY) {
+
+    companion object {
+        @VisibleForTesting
+        const val KEY = "contrast_preference"
+    }
+
+    override fun getAvailabilityStatus(): Int {
+        return AVAILABLE
+    }
+
+    override fun handlePreferenceTreeClick(preference: Preference): Boolean {
+        if (TextUtils.equals(preference.key, preferenceKey)) {
+            val intent = Intent(Intent.ACTION_SHOW_CONTRAST_DIALOG)
+            context.startActivityAsUser(intent, UserHandle(UserHandle.USER_CURRENT))
+            return true
+        }
+        return false
+    }
+
+    override fun getSummary(): CharSequence = getSummary(toContrastLevel(uiModeManager.contrast))
+
+    @VisibleForTesting
+    fun getSummary(contrast: Int): String {
+        return when (contrast) {
+            CONTRAST_LEVEL_HIGH -> context.getString(R.string.contrast_high)
+            CONTRAST_LEVEL_MEDIUM -> context.getString(R.string.contrast_medium)
+            else -> context.getString(R.string.contrast_standard)
+        }
+    }
+}