Fix the cutout of magnification border

If the window is unmagnifiable, it might cause the cutout of
magnification region.
To fix it, we set the flag when the touchable region is not the
entier window frame.

To fix NexusLauncherTests, we add a flag to avoid updateViewLayout
too frequently that would impact memory test and have the performance
issue.

Bug: 196510717
Test: manual test on gestural and 3-button navigation
      presumbit test pass
      run atest NexusLauncherTests with foldables
Change-Id: Ifef81640fe6c08ee1b0dcd3915227fba3002ea43
Merged-In: Ifef81640fe6c08ee1b0dcd3915227fba3002ea43
(cherry picked from commit c8d588cff6697ad2bd7eedd7e668f67a8d1ba9c1)
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index a2e4c22..cc83431 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -61,7 +61,6 @@
 import com.android.launcher3.logger.LauncherAtom;
 import com.android.launcher3.model.data.FolderInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.touch.ItemClickHandler;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.SettingsCache;
@@ -108,6 +107,8 @@
     private final boolean mIsSafeModeEnabled;
     private final boolean mIsUserSetupComplete;
     private boolean mIsDestroyed = false;
+    // The flag to know if the window is excluded from magnification region computation.
+    private boolean mIsExcludeFromMagnificationRegion = false;
 
     public TaskbarActivityContext(Context windowContext, DeviceProfile dp,
             TaskbarNavButtonController buttonController, ScopedUnfoldTransitionProgressProvider
@@ -520,4 +521,25 @@
     protected boolean isUserSetupComplete() {
         return mIsUserSetupComplete;
     }
+
+    /**
+     * Called when we determine the touchable region.
+     *
+     * @param exclude {@code true} then the magnification region computation will omit the window.
+     */
+    public void excludeFromMagnificationRegion(boolean exclude) {
+        if (mIsExcludeFromMagnificationRegion == exclude) {
+            return;
+        }
+
+        mIsExcludeFromMagnificationRegion = exclude;
+        if (exclude) {
+            mWindowLayoutParams.privateFlags |=
+                    WindowManager.LayoutParams.PRIVATE_FLAG_EXCLUDE_FROM_SCREEN_MAGNIFICATION;
+        } else {
+            mWindowLayoutParams.privateFlags &=
+                    ~WindowManager.LayoutParams.PRIVATE_FLAG_EXCLUDE_FROM_SCREEN_MAGNIFICATION;
+        }
+        mWindowManager.updateViewLayout(mDragLayer, mWindowLayoutParams);
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
index cec892f..8c6185c 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
@@ -137,12 +137,14 @@
             // Always have nav buttons be touchable
             mControllers.navbarButtonsViewController.addVisibleButtonsRegion(
                     mTaskbarDragLayer, insetsInfo.touchableRegion);
+            boolean insetsIsTouchableRegion = true;
 
             if (mTaskbarDragLayer.getAlpha() < AlphaUpdateListener.ALPHA_CUTOFF_THRESHOLD) {
                 // Let touches pass through us.
                 insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
             } else if (mControllers.navbarButtonsViewController.isImeVisible()) {
                 insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_CONTENT);
+                insetsIsTouchableRegion = false;
             } else if (!mControllers.uiController.isTaskbarTouchable()) {
                 // Let touches pass through us.
                 insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
@@ -151,9 +153,11 @@
                 // Taskbar has some touchable elements, take over the full taskbar area
                 insetsInfo.setTouchableInsets(mActivity.isTaskbarWindowFullscreen()
                         ? TOUCHABLE_INSETS_FRAME : TOUCHABLE_INSETS_CONTENT);
+                insetsIsTouchableRegion = false;
             } else {
                 insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
             }
+            mActivity.excludeFromMagnificationRegion(insetsIsTouchableRegion);
         }
 
         /**