Unify the caption preference class naming

Bug: 197695932
Test: make RunSettingsRoboTests
Change-Id: Ice244442ad21e6d9f006d488992e9f58cf5c8fb0

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

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2022 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.content.Context;
+import android.view.accessibility.CaptioningManager;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+
+import com.google.common.primitives.Floats;
+import com.google.common.primitives.Ints;
+
+/** Controller that shows the captioning scale and style summary. */
+public class CaptioningAppearancePreferenceController extends BasePreferenceController {
+
+    private final CaptioningManager mCaptioningManager;
+
+    public CaptioningAppearancePreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mCaptioningManager = context.getSystemService(CaptioningManager.class);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return mContext.getString(R.string.preference_summary_default_combination,
+                geFontScaleSummary(), getPresetSummary());
+    }
+
+    private float[] getFontScaleValuesArray() {
+        final String[] fontScaleValuesStrArray = mContext.getResources().getStringArray(
+                R.array.captioning_font_size_selector_values);
+        final int length = fontScaleValuesStrArray.length;
+        final float[] fontScaleValuesArray = new float[length];
+        for (int i = 0; i < length; ++i) {
+            fontScaleValuesArray[i] = Float.parseFloat(fontScaleValuesStrArray[i]);
+        }
+        return fontScaleValuesArray;
+    }
+
+    private CharSequence geFontScaleSummary() {
+        final float[] fontScaleValuesArray = getFontScaleValuesArray();
+        final String[] fontScaleSummaries = mContext.getResources().getStringArray(
+                R.array.captioning_font_size_selector_titles);
+        final float fontScale = mCaptioningManager.getFontScale();
+        final int idx = Floats.indexOf(fontScaleValuesArray, fontScale);
+        return fontScaleSummaries[idx == /* not exist */ -1 ? 0 : idx];
+    }
+
+    private CharSequence getPresetSummary() {
+        final int[] presetValuesArray = mContext.getResources().getIntArray(
+                R.array.captioning_preset_selector_values);
+        final String[] presetSummaries = mContext.getResources().getStringArray(
+                R.array.captioning_preset_selector_titles);
+        final int preset = mCaptioningManager.getRawUserStyle();
+        final int idx = Ints.indexOf(presetValuesArray, preset);
+        return presetSummaries[idx];
+    }
+}