WM: Use task bounds for modal window touchable region

If the task is organized and the window is modal then use the parent
surface control to set the touchable region.

Bug: 168252846
Test: Dismiss dialog in splitscreen mode by tapping outside
Change-Id: I8fdd850a142022f979b12a66bb8ead32438123e3

3 files changed, 37 insertions, 26 deletions

diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index 51cd95e42742..c25fde472431 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -4750,6 +4750,16 @@ public interface WindowManager extends ViewManager {
                     return Integer.toString(inputFeature);
             }
         }
+
+        /**
+         * True if the window should consume all pointer events itself, regardless of whether they
+         * are inside of the window. If the window is modal, its touchable region will expand to the
+         * size of its task.
+         * @hide
+         */
+        public boolean isModal() {
+            return (flags & (FLAG_NOT_TOUCH_MODAL | FLAG_NOT_FOCUSABLE)) == 0;
+        }
     }
 
     /**
diff --git a/services/core/java/com/android/server/wm/InputMonitor.java b/services/core/java/com/android/server/wm/InputMonitor.java
index 1e7b676fbfe4..6afd3355b0a1 100644
--- a/services/core/java/com/android/server/wm/InputMonitor.java
+++ b/services/core/java/com/android/server/wm/InputMonitor.java
@@ -51,7 +51,6 @@ import static com.android.server.wm.WindowManagerService.LOGTAG_INPUT_FOCUS;
 import static java.lang.Integer.MAX_VALUE;
 
 import android.annotation.Nullable;
-import android.graphics.Rect;
 import android.graphics.Region;
 import android.os.Handler;
 import android.os.IBinder;
@@ -303,9 +302,6 @@ final class InputMonitor {
                 && !mDisableWallpaperTouchEvents;
         inputWindowHandle.setHasWallpaper(hasWallpaper);
 
-        final Rect frame = w.getFrame();
-        inputWindowHandle.setFrame(frame.left, frame.top, frame.right, frame.bottom);
-
         // Surface insets are hardcoded to be the same in all directions
         // and we could probably deprecate the "left/right/top/bottom" concept.
         // we avoid reintroducing this concept by just choosing one of them here.
@@ -315,11 +311,19 @@ final class InputMonitor {
         // what is on screen to what is actually being touched in the UI.
         inputWindowHandle.setScaleFactor(w.mGlobalScale != 1f ? (1f / w.mGlobalScale) : 1f);
 
-        final int flags = w.getSurfaceTouchableRegion(mTmpRegion, w.mAttrs.flags);
-        inputWindowHandle.setTouchableRegion(mTmpRegion);
+        // Update layout params flags to force the window to be not touch modal. We do this to
+        // restrict the window's touchable region to the task even if it request touches outside its
+        // window bounds. An example is a dialog in primary split should get touches outside its
+        // window within the primary task but should not get any touches going to the secondary
+        // task.
+        int flags = w.mAttrs.flags;
+        if (w.mAttrs.isModal()) {
+            flags = flags | FLAG_NOT_TOUCH_MODAL;
+        }
         inputWindowHandle.setLayoutParamsFlags(flags);
 
-        boolean useSurfaceCrop = false;
+        boolean useSurfaceBoundsAsTouchRegion = false;
+        SurfaceControl touchableRegionCrop = null;
         final Task task = w.getTask();
         if (task != null) {
             // TODO(b/165794636): Remove the special case for freeform window once drag resizing is
@@ -331,20 +335,22 @@ final class InputMonitor {
                 // we need to make sure that these changes in crop are reflected in the input
                 // windows, and so ensure this flag is set so that the input crop always reflects
                 // the surface hierarchy.
-                // TODO(b/168252846): we have some issues with modal-windows, so we need to cross
-                // that bridge now that we organize full-screen Tasks.
-                inputWindowHandle.setTouchableRegionCrop(null /* Use this surfaces crop */);
-                inputWindowHandle.setReplaceTouchableRegionWithCrop(true);
-                useSurfaceCrop = true;
+                useSurfaceBoundsAsTouchRegion = true;
+
+                if (w.mAttrs.isModal()) {
+                    TaskFragment parent = w.getTaskFragment();
+                    touchableRegionCrop = parent != null ? parent.getSurfaceControl() : null;
+                }
             } else if (task.cropWindowsToRootTaskBounds() && !w.inFreeformWindowingMode()) {
-                inputWindowHandle.setTouchableRegionCrop(task.getRootTask().getSurfaceControl());
-                inputWindowHandle.setReplaceTouchableRegionWithCrop(false);
-                useSurfaceCrop = true;
+                touchableRegionCrop = task.getRootTask().getSurfaceControl();
             }
         }
-        if (!useSurfaceCrop) {
-            inputWindowHandle.setReplaceTouchableRegionWithCrop(false);
-            inputWindowHandle.setTouchableRegionCrop(null);
+        inputWindowHandle.setReplaceTouchableRegionWithCrop(useSurfaceBoundsAsTouchRegion);
+        inputWindowHandle.setTouchableRegionCrop(touchableRegionCrop);
+
+        if (!useSurfaceBoundsAsTouchRegion) {
+            w.getSurfaceTouchableRegion(mTmpRegion, w.mAttrs);
+            inputWindowHandle.setTouchableRegion(mTmpRegion);
         }
     }
 
diff --git a/services/core/java/com/android/server/wm/WindowState.java b/services/core/java/com/android/server/wm/WindowState.java
index 2410d7ec13c2..955919a6fc46 100644
--- a/services/core/java/com/android/server/wm/WindowState.java
+++ b/services/core/java/com/android/server/wm/WindowState.java
@@ -51,7 +51,6 @@ import static android.view.WindowManager.LayoutParams.FLAG_DIM_BEHIND;
 import static android.view.WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD;
 import static android.view.WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
 import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
-import static android.view.WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
 import static android.view.WindowManager.LayoutParams.FLAG_SCALED;
 import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
 import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
@@ -2875,10 +2874,9 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
         }
     }
 
-    int getSurfaceTouchableRegion(Region region, int flags) {
-        final boolean modal = (flags & (FLAG_NOT_TOUCH_MODAL | FLAG_NOT_FOCUSABLE)) == 0;
+    void getSurfaceTouchableRegion(Region region, WindowManager.LayoutParams attrs) {
+        final boolean modal = attrs.isModal();
         if (modal) {
-            flags |= FLAG_NOT_TOUCH_MODAL;
             if (mActivityRecord != null) {
                 // Limit the outer touch to the activity root task region.
                 updateRegionForModalActivityWindow(region);
@@ -2910,8 +2908,6 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
         if (mInvGlobalScale != 1.f) {
             region.scale(mInvGlobalScale);
         }
-
-        return flags;
     }
 
     /**
@@ -3759,10 +3755,9 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
      * {@link WindowManager.LayoutParams#FLAG_NOT_TOUCH_MODAL touch modality.}
      */
     void getEffectiveTouchableRegion(Region outRegion) {
-        final boolean modal = (mAttrs.flags & (FLAG_NOT_TOUCH_MODAL | FLAG_NOT_FOCUSABLE)) == 0;
         final DisplayContent dc = getDisplayContent();
 
-        if (modal && dc != null) {
+        if (mAttrs.isModal() && dc != null) {
             outRegion.set(dc.getBounds());
             cropRegionToRootTaskBoundsIfNeeded(outRegion);
             subtractTouchExcludeRegionIfNeeded(outRegion);