[DO NOT MERGE] Support blacklisting live wallpapers from showing sysui scrims

Add wallpaper changed broadcast receiver to BaseDragLayer, which
checks if the new wallpaper is blacklisted and relays that to
remove the scrims.

Bug: 150144115
Change-Id: I55b7b98fdd419cd76532492461a872367efed67b
(cherry picked from commit d6f917f182)

quickstep/recents_ui_overrides/src/com/android/quickstep/fallback/RecentsRootView.java

@@ -80,7 +80,8 @@ public class RecentsRootView extends BaseDragLayer<RecentsActivity> {
         if (!insets.equals(mInsets)) {
             super.setInsets(insets);
         }
-        setBackground(insets.top == 0 ? null
+        setBackground(insets.top == 0  || !mAllowSysuiScrims
+                ? null
                 : Themes.getAttrDrawable(getContext(), R.attr.workspaceStatusBarScrim));
     }
 

res/values/config.xml

@@ -118,4 +118,7 @@
 
 <!-- Recents -->
     <item type="id" name="overview_panel"/>
+
+    <string-array name="live_wallpapers_remove_sysui_scrims">
+    </string-array>
 </resources>

src/com/android/launcher3/dragndrop/DragLayer.java

@@ -556,7 +556,7 @@ public class DragLayer extends BaseDragLayer<Launcher> {
     @Override
     public void setInsets(Rect insets) {
         super.setInsets(insets);
-        mWorkspaceScrim.onInsetsChanged(insets);
+        mWorkspaceScrim.onInsetsChanged(insets, mAllowSysuiScrims);
         mOverviewScrim.onInsetsChanged(insets);
     }
 

src/com/android/launcher3/graphics/WorkspaceAndHotseatScrim.java

@@ -187,10 +187,13 @@ public class WorkspaceAndHotseatScrim extends Scrim {
         anim.start();
     }
 
-    public void onInsetsChanged(Rect insets) {
-        mDrawTopScrim = mTopScrim != null && insets.top > 0;
-        mDrawBottomScrim = mBottomMask != null &&
-                !mLauncher.getDeviceProfile().isVerticalBarLayout();
+    /**
+     * Determines whether to draw the top and/or bottom scrim based on new insets.
+     */
+    public void onInsetsChanged(Rect insets, boolean allowSysuiScrims) {
+        mDrawTopScrim = allowSysuiScrims && mTopScrim != null && insets.top > 0;
+        mDrawBottomScrim = allowSysuiScrims && mBottomMask != null
+                && !mLauncher.getDeviceProfile().isVerticalBarLayout();
     }
 
     @Override

src/com/android/launcher3/views/BaseDragLayer.java

@@ -23,7 +23,13 @@ import static android.view.MotionEvent.ACTION_UP;
 import static com.android.launcher3.util.DefaultDisplay.getSingleFrameMs;
 
 import android.annotation.TargetApi;
+import android.app.WallpaperInfo;
+import android.app.WallpaperManager;
+import android.content.BroadcastReceiver;
+import android.content.ComponentName;
 import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
 import android.graphics.Insets;
 import android.graphics.Rect;
 import android.graphics.RectF;
@@ -39,8 +45,11 @@ import android.view.WindowInsets;
 import android.view.accessibility.AccessibilityEvent;
 import android.widget.FrameLayout;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.InsettableFrameLayout;
+import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.MultiValueAlpha;
@@ -100,6 +109,14 @@ public abstract class BaseDragLayer<T extends Context & ActivityContext>
 
     protected final T mActivity;
     private final MultiValueAlpha mMultiValueAlpha;
+    private final WallpaperManager mWallpaperManager;
+    private final BroadcastReceiver mWallpaperChangeReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            onWallpaperChanged();
+        }
+    };
+    private final String[] mWallpapersWithoutSysuiScrims;
 
     // All the touch controllers for the view
     protected TouchController[] mControllers;
@@ -110,10 +127,15 @@ public abstract class BaseDragLayer<T extends Context & ActivityContext>
 
     private TouchCompleteListener mTouchCompleteListener;
 
+    protected boolean mAllowSysuiScrims = true;
+
     public BaseDragLayer(Context context, AttributeSet attrs, int alphaChannelCount) {
         super(context, attrs);
         mActivity = (T) ActivityContext.lookupContext(context);
         mMultiValueAlpha = new MultiValueAlpha(this, alphaChannelCount);
+        mWallpaperManager = context.getSystemService(WallpaperManager.class);
+        mWallpapersWithoutSysuiScrims = getResources().getStringArray(
+                R.array.live_wallpapers_remove_sysui_scrims);
     }
 
     /**
@@ -513,4 +535,47 @@ public abstract class BaseDragLayer<T extends Context & ActivityContext>
         }
         return super.dispatchApplyWindowInsets(insets);
     }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        mActivity.registerReceiver(mWallpaperChangeReceiver,
+                new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
+        onWallpaperChanged();
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        mActivity.unregisterReceiver(mWallpaperChangeReceiver);
+    }
+
+    private void onWallpaperChanged() {
+        WallpaperInfo newWallpaperInfo = mWallpaperManager.getWallpaperInfo();
+        boolean oldAllowSysuiScrims = mAllowSysuiScrims;
+        mAllowSysuiScrims = computeAllowSysuiScrims(newWallpaperInfo);
+        if (mAllowSysuiScrims != oldAllowSysuiScrims) {
+            // Reapply insets so scrim can be removed or re-added if necessary.
+            setInsets(mInsets);
+        }
+    }
+
+    /**
+     * Determines whether we can scrim the status bar and nav bar for the given wallpaper by
+     * checking against a list of live wallpapers that we don't show the scrims on.
+     */
+    private boolean computeAllowSysuiScrims(@Nullable WallpaperInfo newWallpaperInfo) {
+        if (newWallpaperInfo == null) {
+            // New wallpaper is static, not live. Thus, blacklist isn't applicable.
+            return true;
+        }
+        ComponentName newWallpaper = newWallpaperInfo.getComponent();
+        for (String wallpaperWithoutScrim : mWallpapersWithoutSysuiScrims) {
+            if (newWallpaper.equals(ComponentName.unflattenFromString(wallpaperWithoutScrim))) {
+                // New wallpaper is blacklisted from showing a scrim.
+                return false;
+            }
+        }
+        return true;
+    }
 }