Refactor CaptionAppearanceFragment to improve maintainability (3/n)

Root cause: There is a bunch of different logic of preferences in CaptionAppearanceFragment. It’s hard to implement new features and hard to maintain and hard to be testable.
Solution: Move out color and edge preference logic of CaptionAppearanceFragment into controllers to reduce the complexity of the relationship between preference and fragment.

Bug: 197695932
Test: make RunSettingsRoboTests ROBOTEST_FILTER=com.android.settings.accessibility
Change-Id: I8ed80b445a0d376a7e9dda87feda82420a78a9da

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

@@ -19,10 +19,12 @@ package com.android.settings.accessibility;
 import static com.android.settings.accessibility.AccessibilityUtil.State.OFF;
 import static com.android.settings.accessibility.AccessibilityUtil.State.ON;
 
+import android.content.ContentResolver;
 import android.content.Context;
 import android.provider.Settings;
 import android.view.View;
 import android.view.accessibility.CaptioningManager;
+import android.view.accessibility.CaptioningManager.CaptionStyle;
 
 import com.android.internal.widget.SubtitleView;
 import com.android.settings.R;
@@ -32,9 +34,7 @@ import com.google.common.annotations.VisibleForTesting;
 
 import java.util.Locale;
 
-/**
- * Helper class for caption.
- */
+/** Helper class for caption. */
 public class CaptionHelper {
 
     /* WebVtt specifies line height as 5.3% of the viewport height. */
@@ -42,10 +42,12 @@ public class CaptionHelper {
     static final float LINE_HEIGHT_RATIO = 0.0533f;
 
     private final Context mContext;
+    private final ContentResolver mContentResolver;
     private final CaptioningManager mCaptioningManager;
 
     public CaptionHelper(Context context) {
         mContext = context;
+        mContentResolver = mContext.getContentResolver();
         mCaptioningManager = context.getSystemService(CaptioningManager.class);
     }
 
@@ -104,4 +106,84 @@ public class CaptionHelper {
             previewText.setText(R.string.captioning_preview_characters);
         }
     }
+
+    /**
+     * Sets the user's preferred captioning background color.
+     *
+     * @param color The captioning background color
+     */
+    public void setBackgroundColor(int color) {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR, color);
+    }
+
+    /** Returns the captioning background color.*/
+    public int getBackgroundColor() {
+        final CaptionStyle attrs = CaptionStyle.getCustomStyle(mContentResolver);
+        return attrs.hasBackgroundColor() ? attrs.backgroundColor : CaptionStyle.COLOR_UNSPECIFIED;
+    }
+
+    /**
+     * Sets the user's preferred captioning foreground color.
+     *
+     * @param color The captioning foreground color
+     */
+    public void setForegroundColor(int color) {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR, color);
+    }
+
+    /** Returns the captioning foreground color.*/
+    public int getForegroundColor() {
+        final CaptionStyle attrs = CaptionStyle.getCustomStyle(mContentResolver);
+        return attrs.hasForegroundColor() ? attrs.foregroundColor : CaptionStyle.COLOR_UNSPECIFIED;
+    }
+
+    /**
+     * Sets the user's preferred captioning window color.
+     *
+     * @param color The captioning window color
+     */
+    public void setWindowColor(int color) {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_CAPTIONING_WINDOW_COLOR, color);
+    }
+
+    /** Returns the captioning window color.*/
+    public int getWindowColor() {
+        final CaptionStyle attrs = CaptionStyle.getCustomStyle(mContentResolver);
+        return attrs.hasWindowColor() ? attrs.windowColor : CaptionStyle.COLOR_UNSPECIFIED;
+    }
+
+    /**
+     * Sets the user's preferred captioning edge color.
+     *
+     * @param color The captioning edge color
+     */
+    public void setEdgeColor(int color) {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_CAPTIONING_EDGE_COLOR, color);
+    }
+
+    /** Returns the captioning edge color.*/
+    public int getEdgeColor() {
+        final CaptionStyle attrs = CaptionStyle.getCustomStyle(mContentResolver);
+        return attrs.edgeColor;
+    }
+
+    /**
+     * Sets the user's preferred captioning edge type.
+     *
+     * @param type The captioning edge type
+     */
+    public void setEdgeType(int type) {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_CAPTIONING_EDGE_TYPE, type);
+    }
+
+    /** Returns the captioning edge type.*/
+    public int getEdgeType() {
+        final CaptionStyle attrs = CaptionStyle.getCustomStyle(mContentResolver);
+        return attrs.edgeType;
+    }
 }