Adding support for customize highlight region in preference

> Also fixing notification dots setting not getting highlighted

Bug: 184747760
Test: Manual
Change-Id: Ic9c2bfbb9750bed60afc14e824181f650c8cff33

res/xml/launcher_preferences.xml

@@ -22,14 +22,7 @@
         android:key="pref_icon_badging"
         android:title="@string/notification_dots_title"
         android:persistent="false"
-        android:widgetLayout="@layout/notification_pref_warning" >
-        <intent android:action="android.settings.NOTIFICATION_SETTINGS">
-            <!-- This extra highlights the "Allow notification dots" field in Notification settings -->
-            <extra
-                android:name=":settings:fragment_args_key"
-                android:value="notification_badging" />
-        </intent>
-    </com.android.launcher3.settings.NotificationDotsPreference>
+        android:widgetLayout="@layout/notification_pref_warning" />
 
     <!--
       LAUNCHER_ADD_NEW_APPS_TO_HOME_SCREEN_ENABLED(613)

src/com/android/launcher3/settings/NotificationDotsPreference.java

@@ -85,6 +85,12 @@ public class NotificationDotsPreference extends Preference
                 Settings.Secure.getUriFor(NOTIFICATION_ENABLED_LISTENERS),
                 false, mListenerListObserver);
         updateUI();
+
+        // Update intent
+        Bundle extras = new Bundle();
+        extras.putString(EXTRA_FRAGMENT_ARG_KEY, "notification_badging");
+        setIntent(new Intent("android.settings.NOTIFICATION_SETTINGS")
+                .putExtra(EXTRA_SHOW_FRAGMENT_ARGS, extras));
     }
 
     private void updateUI() {

src/com/android/launcher3/settings/PreferenceHighlighter.java

@@ -24,16 +24,18 @@ import android.animation.ValueAnimator;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
+import android.graphics.RectF;
 import android.util.Property;
 import android.view.View;
 
-import com.android.launcher3.util.Themes;
-
+import androidx.preference.Preference;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.recyclerview.widget.RecyclerView.ItemDecoration;
 import androidx.recyclerview.widget.RecyclerView.State;
 import androidx.recyclerview.widget.RecyclerView.ViewHolder;
 
+import com.android.launcher3.util.Themes;
+
 /**
  * Utility class for highlighting a preference
  */
@@ -62,14 +64,16 @@ public class PreferenceHighlighter extends ItemDecoration implements Runnable {
     private final Paint mPaint = new Paint();
     private final RecyclerView mRv;
     private final int mIndex;
+    private final Preference mPreference;
+    private final RectF mDrawRect = new RectF();
 
     private boolean mHighLightStarted = false;
     private int mHighlightColor = END_COLOR;
 
-
-    public PreferenceHighlighter(RecyclerView rv, int index) {
+    public PreferenceHighlighter(RecyclerView rv, int index, Preference preference) {
         mRv = rv;
         mIndex = index;
+        mPreference = preference;
     }
 
     @Override
@@ -92,7 +96,8 @@ public class PreferenceHighlighter extends ItemDecoration implements Runnable {
         if (!mHighLightStarted) {
             // Start highlight
             int colorTo = setColorAlphaBound(Themes.getColorAccent(mRv.getContext()), 66);
-            ObjectAnimator anim = ObjectAnimator.ofArgb(this, HIGHLIGHT_COLOR, END_COLOR, colorTo);
+            ObjectAnimator anim = ObjectAnimator.ofArgb(this, HIGHLIGHT_COLOR, END_COLOR,
+                    colorTo);
             anim.setDuration(HIGHLIGHT_FADE_IN_DURATION);
             anim.setRepeatMode(ValueAnimator.REVERSE);
             anim.setRepeatCount(4);
@@ -108,7 +113,11 @@ public class PreferenceHighlighter extends ItemDecoration implements Runnable {
 
         View view = holder.itemView;
         mPaint.setColor(mHighlightColor);
-        c.drawRect(0, view.getY(), parent.getWidth(), view.getY() + view.getHeight(), mPaint);
+        mDrawRect.set(0, view.getY(), parent.getWidth(), view.getY() + view.getHeight());
+        if (mPreference instanceof HighlightDelegate) {
+            ((HighlightDelegate) mPreference).offsetHighlight(view, mDrawRect);
+        }
+        c.drawRect(mDrawRect, mPaint);
     }
 
     private void removeHighlight() {
@@ -124,4 +133,16 @@ public class PreferenceHighlighter extends ItemDecoration implements Runnable {
         });
         anim.start();
     }
+
+    /**
+     * Interface to be implemented by a preference to customize the highlight are
+     */
+    public interface HighlightDelegate {
+
+        /**
+         * Allows the preference to update the highlight area
+         */
+        void offsetHighlight(View prefView, RectF bounds);
+
+    }
 }

src/com/android/launcher3/settings/SettingsActivity.java

@@ -237,7 +237,9 @@ public class SettingsActivity extends FragmentActivity
             RecyclerView list = getListView();
             PreferencePositionCallback callback = (PreferencePositionCallback) list.getAdapter();
             int position = callback.getPreferenceAdapterPosition(mHighLightKey);
-            return position >= 0 ? new PreferenceHighlighter(list, position) : null;
+            return position >= 0 ? new PreferenceHighlighter(
+                    list, position, screen.findPreference(mHighLightKey))
+                    : null;
         }
 
         private void requestAccessibilityFocus(@NonNull final RecyclerView rv) {