1 files changed, 47 insertions, 4 deletions

diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 7a91d1e9c28a..f236b5a73be0 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -28,7 +28,6 @@ import static android.content.Intent.EXTRA_USER_HANDLE;
 import static android.os.Process.ROOT_UID;
 import static android.os.Process.SHELL_UID;
 import static android.os.Process.SYSTEM_UID;
-import static android.os.Process.THREAD_PRIORITY_DISPLAY;
 import static android.os.Process.myPid;
 import static android.os.Trace.TRACE_TAG_WINDOW_MANAGER;
 import static android.os.UserHandle.USER_NULL;
@@ -48,7 +47,6 @@ import static android.view.WindowManager.LayoutParams.INPUT_FEATURE_NO_INPUT_CHA
 import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
 import static android.view.WindowManager.LayoutParams.LAST_SUB_WINDOW;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW;
-import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_TASK_SNAPSHOT;
 import static android.view.WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
 import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
@@ -228,7 +226,6 @@ import com.android.server.DisplayThread;
 import com.android.server.EventLogTags;
 import com.android.server.FgThread;
 import com.android.server.LocalServices;
-import com.android.server.ThreadPriorityBooster;
 import com.android.server.UiThread;
 import com.android.server.Watchdog;
 import com.android.server.input.InputManagerService;
@@ -493,12 +490,15 @@ public class WindowManagerService extends IWindowManager.Stub
      */
     Runnable mWaitingForDrawnCallback;
 
+    /** List of window currently causing non-system overlay windows to be hidden. */
+    private ArrayList<WindowState> mHidingNonSystemOverlayWindows = new ArrayList<>();
+
     /**
      * Stores for each user whether screencapture is disabled
      * This array is essentially a cache for all userId for
      * {@link android.app.admin.DevicePolicyManager#getScreenCaptureDisabled}
      */
-    SparseArray<Boolean> mScreenCaptureDisabled = new SparseArray<>();
+    private SparseArray<Boolean> mScreenCaptureDisabled = new SparseArray<>();
 
     IInputMethodManager mInputMethodManager;
 
@@ -1435,6 +1435,9 @@ public class WindowManagerService extends IWindowManager.Stub
                 }
             }
 
+            final boolean hideSystemAlertWindows = !mHidingNonSystemOverlayWindows.isEmpty();
+            win.setForceHideNonSystemOverlayWindowIfNeeded(hideSystemAlertWindows);
+
             final AppWindowToken aToken = token.asAppWindowToken();
             if (type == TYPE_APPLICATION_STARTING && aToken != null) {
                 aToken.startingWindow = win;
@@ -1708,6 +1711,7 @@ public class WindowManagerService extends IWindowManager.Stub
         }
         mPendingRemove.remove(win);
         mResizingWindows.remove(win);
+        updateNonSystemOverlayWindowsVisibilityIfNeeded(win, false /* surfaceShown */);
         mWindowsChanged = true;
         if (DEBUG_WINDOW_MOVEMENT) Slog.v(TAG_WM, "Final remove of window: " + win);
 
@@ -6414,6 +6418,21 @@ public class WindowManagerService extends IWindowManager.Stub
             ArrayList<WindowState> windows) {
         mRoot.dumpWindowsNoHeader(pw, dumpAll, windows);
 
+        if (!mHidingNonSystemOverlayWindows.isEmpty()) {
+            pw.println();
+            pw.println("  Hiding System Alert Windows:");
+            for (int i = mHidingNonSystemOverlayWindows.size() - 1; i >= 0; i--) {
+                final WindowState w = mHidingNonSystemOverlayWindows.get(i);
+                pw.print("  #"); pw.print(i); pw.print(' ');
+                pw.print(w);
+                if (dumpAll) {
+                    pw.println(":");
+                    w.dump(pw, "    ", true);
+                } else {
+                    pw.println();
+                }
+            }
+        }
         if (mPendingRemove.size() > 0) {
             pw.println();
             pw.println("  Remove pending for:");
@@ -7519,4 +7538,28 @@ public class WindowManagerService extends IWindowManager.Stub
             }
         }
     }
+
+    void updateNonSystemOverlayWindowsVisibilityIfNeeded(WindowState win, boolean surfaceShown) {
+        if (!win.hideNonSystemOverlayWindowsWhenVisible()) {
+            return;
+        }
+        final boolean systemAlertWindowsHidden = !mHidingNonSystemOverlayWindows.isEmpty();
+        if (surfaceShown) {
+            if (!mHidingNonSystemOverlayWindows.contains(win)) {
+                mHidingNonSystemOverlayWindows.add(win);
+            }
+        } else {
+            mHidingNonSystemOverlayWindows.remove(win);
+        }
+
+        final boolean hideSystemAlertWindows = !mHidingNonSystemOverlayWindows.isEmpty();
+
+        if (systemAlertWindowsHidden == hideSystemAlertWindows) {
+            return;
+        }
+
+        mRoot.forAllWindows((w) -> {
+            w.setForceHideNonSystemOverlayWindowIfNeeded(hideSystemAlertWindows);
+        }, false /* traverseTopToBottom */);
+    }
 }