Merge "Replace custom header spy window with custom touchable regions" into main

9 files changed, 426 insertions, 114 deletions

diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecorViewModel.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecorViewModel.java
index 7265fb8f8027..c9f2d2e8c0e2 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecorViewModel.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecorViewModel.java
@@ -26,6 +26,7 @@ import static android.view.WindowManager.TRANSIT_CHANGE;
 
 import static com.android.window.flags.Flags.enableDisplayFocusInShellTransitions;
 
+import android.annotation.NonNull;
 import android.app.ActivityManager.RunningTaskInfo;
 import android.content.ContentResolver;
 import android.content.Context;
@@ -110,6 +111,7 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel, FocusT
                     }
                     mMainExecutor.execute(() -> {
                         mExclusionRegion.set(systemGestureExclusion);
+                        onExclusionRegionChanged(displayId, mExclusionRegion);
                     });
                 }
             };
@@ -163,7 +165,7 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel, FocusT
             boolean isFocusedGlobally) {
         final WindowDecoration decor = mWindowDecorByTaskId.get(taskId);
         if (decor != null) {
-            decor.relayout(decor.mTaskInfo, isFocusedGlobally);
+            decor.relayout(decor.mTaskInfo, isFocusedGlobally, decor.mExclusionRegion);
         }
     }
 
@@ -199,9 +201,9 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel, FocusT
 
         if (enableDisplayFocusInShellTransitions()) {
             // Pass the current global focus status to avoid updates outside of a ShellTransition.
-            decoration.relayout(taskInfo, decoration.mHasGlobalFocus);
+            decoration.relayout(taskInfo, decoration.mHasGlobalFocus, decoration.mExclusionRegion);
         } else {
-            decoration.relayout(taskInfo, taskInfo.isFocused);
+            decoration.relayout(taskInfo, taskInfo.isFocused, decoration.mExclusionRegion);
         }
     }
 
@@ -240,7 +242,7 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel, FocusT
         } else {
             decoration.relayout(taskInfo, startT, finishT, false /* applyStartTransactionOnDraw */,
                     false /* setTaskCropAndPosition */,
-                    mFocusTransitionObserver.hasGlobalFocus(taskInfo));
+                    mFocusTransitionObserver.hasGlobalFocus(taskInfo), mExclusionRegion);
         }
     }
 
@@ -254,7 +256,7 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel, FocusT
 
         decoration.relayout(taskInfo, startT, finishT, false /* applyStartTransactionOnDraw */,
                 false /* setTaskCropAndPosition */,
-                mFocusTransitionObserver.hasGlobalFocus(taskInfo));
+                mFocusTransitionObserver.hasGlobalFocus(taskInfo), mExclusionRegion);
     }
 
     @Override
@@ -266,6 +268,15 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel, FocusT
         decoration.close();
     }
 
+    private void onExclusionRegionChanged(int displayId, @NonNull Region exclusionRegion) {
+        final int decorCount = mWindowDecorByTaskId.size();
+        for (int i = 0; i < decorCount; i++) {
+            final CaptionWindowDecoration decoration = mWindowDecorByTaskId.valueAt(i);
+            if (decoration.mTaskInfo.displayId != displayId) continue;
+            decoration.onExclusionRegionChanged(exclusionRegion);
+        }
+    }
+
     private boolean shouldShowWindowDecor(RunningTaskInfo taskInfo) {
         if (taskInfo.getWindowingMode() == WINDOWING_MODE_FREEFORM) {
             return true;
@@ -333,7 +344,7 @@ public class CaptionWindowDecorViewModel implements WindowDecorViewModel, FocusT
         windowDecoration.setTaskDragResizer(taskPositioner);
         windowDecoration.relayout(taskInfo, startT, finishT,
                 false /* applyStartTransactionOnDraw */, false /* setTaskCropAndPosition */,
-                mFocusTransitionObserver.hasGlobalFocus(taskInfo));
+                mFocusTransitionObserver.hasGlobalFocus(taskInfo), mExclusionRegion);
     }
 
     private class CaptionTouchEventListener implements
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java
index c9546731a193..982fda0ddf36 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java
@@ -36,6 +36,7 @@ import android.graphics.Color;
 import android.graphics.Insets;
 import android.graphics.Point;
 import android.graphics.Rect;
+import android.graphics.Region;
 import android.graphics.drawable.GradientDrawable;
 import android.os.Handler;
 import android.util.Size;
@@ -174,7 +175,8 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
     }
 
     @Override
-    void relayout(RunningTaskInfo taskInfo, boolean hasGlobalFocus) {
+    void relayout(RunningTaskInfo taskInfo, boolean hasGlobalFocus,
+            @NonNull Region displayExclusionRegion) {
         final SurfaceControl.Transaction t = new SurfaceControl.Transaction();
         // The crop and position of the task should only be set when a task is fluid resizing. In
         // all other cases, it is expected that the transition handler positions and crops the task
@@ -186,7 +188,7 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
         // synced with the buffer transaction (that draws the View). Both will be shown on screen
         // at the same, whereas applying them independently causes flickering. See b/270202228.
         relayout(taskInfo, t, t, true /* applyStartTransactionOnDraw */,
-                shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus);
+                shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus, displayExclusionRegion);
     }
 
     @VisibleForTesting
@@ -198,7 +200,8 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
             boolean isStatusBarVisible,
             boolean isKeyguardVisibleAndOccluded,
             InsetsState displayInsetsState,
-            boolean hasGlobalFocus) {
+            boolean hasGlobalFocus,
+            @NonNull Region globalExclusionRegion) {
         relayoutParams.reset();
         relayoutParams.mRunningTaskInfo = taskInfo;
         relayoutParams.mLayoutResId = R.layout.caption_window_decor;
@@ -210,6 +213,7 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
         relayoutParams.mSetTaskVisibilityPositionAndCrop = shouldSetTaskVisibilityPositionAndCrop;
         relayoutParams.mIsCaptionVisible = taskInfo.isFreeform()
                 || (isStatusBarVisible && !isKeyguardVisibleAndOccluded);
+        relayoutParams.mDisplayExclusionRegion.set(globalExclusionRegion);
 
         if (TaskInfoKt.isTransparentCaptionBarAppearance(taskInfo)) {
             // If the app is requesting to customize the caption bar, allow input to fall
@@ -236,7 +240,8 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
     void relayout(RunningTaskInfo taskInfo,
             SurfaceControl.Transaction startT, SurfaceControl.Transaction finishT,
             boolean applyStartTransactionOnDraw, boolean shouldSetTaskVisibilityPositionAndCrop,
-            boolean hasGlobalFocus) {
+            boolean hasGlobalFocus,
+            @NonNull Region globalExclusionRegion) {
         final boolean isFreeform =
                 taskInfo.getWindowingMode() == WindowConfiguration.WINDOWING_MODE_FREEFORM;
         final boolean isDragResizeable = ENABLE_WINDOWING_SCALED_RESIZING.isTrue()
@@ -249,7 +254,8 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
         updateRelayoutParams(mRelayoutParams, taskInfo, applyStartTransactionOnDraw,
                 shouldSetTaskVisibilityPositionAndCrop, mIsStatusBarVisible,
                 mIsKeyguardVisibleAndOccluded,
-                mDisplayController.getInsetsState(taskInfo.displayId), hasGlobalFocus);
+                mDisplayController.getInsetsState(taskInfo.displayId), hasGlobalFocus,
+                globalExclusionRegion);
 
         relayout(mRelayoutParams, startT, finishT, wct, oldRootView, mResult);
         // After this line, mTaskInfo is up-to-date and should be used instead of taskInfo
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java
index 5e3026a73971..a2d81a0ed90a 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java
@@ -220,6 +220,7 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
                     }
                     mMainExecutor.execute(() -> {
                         mExclusionRegion.set(systemGestureExclusion);
+                        onExclusionRegionChanged(displayId, mExclusionRegion);
                     });
                 }
             };
@@ -432,7 +433,7 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
             boolean isFocusedGlobally) {
         final WindowDecoration decor = mWindowDecorByTaskId.get(taskId);
         if (decor != null) {
-            decor.relayout(decor.mTaskInfo, isFocusedGlobally);
+            decor.relayout(decor.mTaskInfo, isFocusedGlobally, decor.mExclusionRegion);
         }
     }
 
@@ -471,9 +472,9 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
         }
         if (enableDisplayFocusInShellTransitions()) {
             // Pass the current global focus status to avoid updates outside of a ShellTransition.
-            decoration.relayout(taskInfo, decoration.mHasGlobalFocus);
+            decoration.relayout(taskInfo, decoration.mHasGlobalFocus, decoration.mExclusionRegion);
         } else {
-            decoration.relayout(taskInfo, taskInfo.isFocused);
+            decoration.relayout(taskInfo, taskInfo.isFocused, decoration.mExclusionRegion);
         }
         mActivityOrientationChangeHandler.ifPresent(handler ->
                 handler.handleActivityOrientationChange(oldTaskInfo, taskInfo));
@@ -514,7 +515,8 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
         } else {
             decoration.relayout(taskInfo, startT, finishT, false /* applyStartTransactionOnDraw */,
                     false /* shouldSetTaskPositionAndCrop */,
-                    mFocusTransitionObserver.hasGlobalFocus(taskInfo));
+                    mFocusTransitionObserver.hasGlobalFocus(taskInfo),
+                    mExclusionRegion);
         }
     }
 
@@ -528,7 +530,8 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
 
         decoration.relayout(taskInfo, startT, finishT, false /* applyStartTransactionOnDraw */,
                 false /* shouldSetTaskPositionAndCrop */,
-                mFocusTransitionObserver.hasGlobalFocus(taskInfo));
+                mFocusTransitionObserver.hasGlobalFocus(taskInfo),
+                mExclusionRegion);
     }
 
     @Override
@@ -548,6 +551,15 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
         mWindowDecorByTaskId.remove(taskInfo.taskId);
     }
 
+    private void onExclusionRegionChanged(int displayId, @NonNull Region exclusionRegion) {
+        final int decorCount = mWindowDecorByTaskId.size();
+        for (int i = 0; i < decorCount; i++) {
+            final DesktopModeWindowDecoration decoration = mWindowDecorByTaskId.valueAt(i);
+            if (decoration.mTaskInfo.displayId != displayId) continue;
+            decoration.onExclusionRegionChanged(exclusionRegion);
+        }
+    }
+
     private void openHandleMenu(int taskId) {
         final DesktopModeWindowDecoration decoration = mWindowDecorByTaskId.get(taskId);
         decoration.createHandleMenu(checkNumberOfOtherInstances(decoration.mTaskInfo)
@@ -750,10 +762,13 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
 
         /**
          * Whether to pilfer the next motion event to send cancellations to the windows below.
-         * Useful when the caption window is spy and the gesture should be handle by the system
+         * Useful when the caption window is spy and the gesture should be handled by the system
          * instead of by the app for their custom header content.
+         * Should not have any effect when {@link Flags#enableAccessibleCustomHeaders()}, because
+         * a spy window is not used then.
          */
-        private boolean mShouldPilferCaptionEvents;
+        private boolean mIsCustomHeaderGesture;
+        private boolean mIsResizeGesture;
         private boolean mIsDragging;
         private boolean mTouchscreenInUse;
         private boolean mHasLongClicked;
@@ -867,7 +882,7 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
                 // to offset position relative to caption as a whole.
                 int[] viewLocation = new int[2];
                 v.getLocationInWindow(viewLocation);
-                final boolean isResizeEvent = decoration.shouldResizeListenerHandleEvent(e,
+                mIsResizeGesture = decoration.shouldResizeListenerHandleEvent(e,
                         new Point(viewLocation[0], viewLocation[1]));
                 // The caption window may be a spy window when the caption background is
                 // transparent, which means events will fall through to the app window. Make
@@ -875,21 +890,23 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
                 // customizable region and what the app reported as exclusion areas, because
                 // the drag-move or other caption gestures should take priority outside those
                 // regions.
-                mShouldPilferCaptionEvents = !(downInCustomizableCaptionRegion
-                        && downInExclusionRegion && isTransparentCaption) && !isResizeEvent;
+                mIsCustomHeaderGesture = downInCustomizableCaptionRegion
+                        && downInExclusionRegion && isTransparentCaption;
             }
-            if (!mShouldPilferCaptionEvents) {
-                // The event will be handled by a window below or pilfered by resize handler.
+            if (mIsCustomHeaderGesture || mIsResizeGesture) {
+                // The event will be handled by the custom window below or pilfered by resize
+                // handler.
                 return false;
             }
-            // Otherwise pilfer so that windows below receive cancellations for this gesture, and
-            // continue normal handling as a caption gesture.
-            if (mInputManager != null) {
+            if (mInputManager != null
+                    && !Flags.enableAccessibleCustomHeaders()) {
+                // Pilfer so that windows below receive cancellations for this gesture.
                 mInputManager.pilferPointers(v.getViewRootImpl().getInputToken());
             }
             if (isUpOrCancel) {
                 // Gesture is finished, reset state.
-                mShouldPilferCaptionEvents = false;
+                mIsCustomHeaderGesture = false;
+                mIsResizeGesture = false;
             }
             if (isAppHandle) {
                 return mHandleDragDetector.onMotionEvent(v, e);
@@ -1592,7 +1609,8 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
         windowDecoration.setDragPositioningCallback(taskPositioner);
         windowDecoration.relayout(taskInfo, startT, finishT,
                 false /* applyStartTransactionOnDraw */, false /* shouldSetTaskPositionAndCrop */,
-                mFocusTransitionObserver.hasGlobalFocus(taskInfo));
+                mFocusTransitionObserver.hasGlobalFocus(taskInfo),
+                mExclusionRegion);
         if (!DesktopModeFlags.ENABLE_HANDLE_INPUT_FIX.isTrue()) {
             incrementEventReceiverTasks(taskInfo.displayId);
         }
@@ -1618,6 +1636,7 @@ public class DesktopModeWindowDecorViewModel implements WindowDecorViewModel,
         pw.println(innerPrefix + "mTransitionDragActive=" + mTransitionDragActive);
         pw.println(innerPrefix + "mEventReceiversByDisplay=" + mEventReceiversByDisplay);
         pw.println(innerPrefix + "mWindowDecorByTaskId=" + mWindowDecorByTaskId);
+        pw.println(innerPrefix + "mExclusionRegion=" + mExclusionRegion);
     }
 
     private class DesktopModeOnTaskRepositionAnimationListener
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java
index d065ac33a958..cdcf14e0cbf3 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java
@@ -394,7 +394,8 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
     }
 
     @Override
-    void relayout(ActivityManager.RunningTaskInfo taskInfo, boolean hasGlobalFocus) {
+    void relayout(ActivityManager.RunningTaskInfo taskInfo, boolean hasGlobalFocus,
+            @NonNull Region displayExclusionRegion) {
         final SurfaceControl.Transaction t = mSurfaceControlTransactionSupplier.get();
         // The visibility, crop and position of the task should only be set when a task is
         // fluid resizing. In all other cases, it is expected that the transition handler sets
@@ -415,7 +416,7 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
         // causes flickering. See b/270202228.
         final boolean applyTransactionOnDraw = taskInfo.isFreeform();
         relayout(taskInfo, t, t, applyTransactionOnDraw, shouldSetTaskVisibilityPositionAndCrop,
-                hasGlobalFocus);
+                hasGlobalFocus, displayExclusionRegion);
         if (!applyTransactionOnDraw) {
             t.apply();
         }
@@ -442,18 +443,18 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
     void relayout(ActivityManager.RunningTaskInfo taskInfo,
             SurfaceControl.Transaction startT, SurfaceControl.Transaction finishT,
             boolean applyStartTransactionOnDraw, boolean shouldSetTaskVisibilityPositionAndCrop,
-            boolean hasGlobalFocus) {
+            boolean hasGlobalFocus, @NonNull Region displayExclusionRegion) {
         Trace.beginSection("DesktopModeWindowDecoration#relayout");
         if (taskInfo.isFreeform()) {
             // The Task is in Freeform mode -> show its header in sync since it's an integral part
             // of the window itself - a delayed header might cause bad UX.
             relayoutInSync(taskInfo, startT, finishT, applyStartTransactionOnDraw,
-                    shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus);
+                    shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus, displayExclusionRegion);
         } else {
             // The Task is outside Freeform mode -> allow the handle view to be delayed since the
             // handle is just a small addition to the window.
             relayoutWithDelayedViewHost(taskInfo, startT, finishT, applyStartTransactionOnDraw,
-                    shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus);
+                    shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus, displayExclusionRegion);
         }
         Trace.endSection();
     }
@@ -462,11 +463,11 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
     private void relayoutInSync(ActivityManager.RunningTaskInfo taskInfo,
             SurfaceControl.Transaction startT, SurfaceControl.Transaction finishT,
             boolean applyStartTransactionOnDraw, boolean shouldSetTaskVisibilityPositionAndCrop,
-            boolean hasGlobalFocus) {
+            boolean hasGlobalFocus, @NonNull Region displayExclusionRegion) {
         // Clear the current ViewHost runnable as we will update the ViewHost here
         clearCurrentViewHostRunnable();
         updateRelayoutParamsAndSurfaces(taskInfo, startT, finishT, applyStartTransactionOnDraw,
-                shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus);
+                shouldSetTaskVisibilityPositionAndCrop, hasGlobalFocus, displayExclusionRegion);
         if (mResult.mRootView != null) {
             updateViewHost(mRelayoutParams, startT, mResult);
         }
@@ -489,7 +490,8 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
     private void relayoutWithDelayedViewHost(ActivityManager.RunningTaskInfo taskInfo,
             SurfaceControl.Transaction startT, SurfaceControl.Transaction finishT,
             boolean applyStartTransactionOnDraw, boolean shouldSetTaskVisibilityPositionAndCrop,
-            boolean hasGlobalFocus) {
+            boolean hasGlobalFocus,
+            @NonNull Region displayExclusionRegion) {
         if (applyStartTransactionOnDraw) {
             throw new IllegalArgumentException(
                     "We cannot both sync viewhost ondraw and delay viewhost creation.");
@@ -498,7 +500,7 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
         clearCurrentViewHostRunnable();
         updateRelayoutParamsAndSurfaces(taskInfo, startT, finishT,
                 false /* applyStartTransactionOnDraw */, shouldSetTaskVisibilityPositionAndCrop,
-                hasGlobalFocus);
+                hasGlobalFocus, displayExclusionRegion);
         if (mResult.mRootView == null) {
             // This means something blocks the window decor from showing, e.g. the task is hidden.
             // Nothing is set up in this case including the decoration surface.
@@ -513,7 +515,7 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
     private void updateRelayoutParamsAndSurfaces(ActivityManager.RunningTaskInfo taskInfo,
             SurfaceControl.Transaction startT, SurfaceControl.Transaction finishT,
             boolean applyStartTransactionOnDraw, boolean shouldSetTaskVisibilityPositionAndCrop,
-            boolean hasGlobalFocus) {
+            boolean hasGlobalFocus, @NonNull Region displayExclusionRegion) {
         Trace.beginSection("DesktopModeWindowDecoration#updateRelayoutParamsAndSurfaces");
         if (Flags.enableDesktopWindowingAppToWeb()) {
             setCapturedLink(taskInfo.capturedLink, taskInfo.capturedLinkTimestamp);
@@ -538,7 +540,8 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
         updateRelayoutParams(mRelayoutParams, mContext, taskInfo, applyStartTransactionOnDraw,
                 shouldSetTaskVisibilityPositionAndCrop, mIsStatusBarVisible,
                 mIsKeyguardVisibleAndOccluded, inFullImmersive,
-                mDisplayController.getInsetsState(taskInfo.displayId), hasGlobalFocus);
+                mDisplayController.getInsetsState(taskInfo.displayId), hasGlobalFocus,
+                displayExclusionRegion);
 
         final WindowDecorLinearLayout oldRootView = mResult.mRootView;
         final SurfaceControl oldDecorationSurface = mDecorationContainerSurface;
@@ -879,7 +882,8 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
             boolean isKeyguardVisibleAndOccluded,
             boolean inFullImmersiveMode,
             @NonNull InsetsState displayInsetsState,
-            boolean hasGlobalFocus) {
+            boolean hasGlobalFocus,
+            @NonNull Region displayExclusionRegion) {
         final int captionLayoutId = getDesktopModeWindowDecorLayoutId(taskInfo.getWindowingMode());
         final boolean isAppHeader =
                 captionLayoutId == R.layout.desktop_mode_app_header;
@@ -890,6 +894,7 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
         relayoutParams.mCaptionHeightId = getCaptionHeightIdStatic(taskInfo.getWindowingMode());
         relayoutParams.mCaptionWidthId = getCaptionWidthId(relayoutParams.mLayoutResId);
         relayoutParams.mHasGlobalFocus = hasGlobalFocus;
+        relayoutParams.mDisplayExclusionRegion.set(displayExclusionRegion);
 
         final boolean showCaption;
         if (Flags.enableFullyImmersiveInDesktop()) {
@@ -915,10 +920,20 @@ public class DesktopModeWindowDecoration extends WindowDecoration<WindowDecorLin
         relayoutParams.mIsInsetSource = isAppHeader && !inFullImmersiveMode;
         if (isAppHeader) {
             if (TaskInfoKt.isTransparentCaptionBarAppearance(taskInfo)) {
-                // If the app is requesting to customize the caption bar, allow input to fall
-                // through to the windows below so that the app can respond to input events on
-                // their custom content.
-                relayoutParams.mInputFeatures |= WindowManager.LayoutParams.INPUT_FEATURE_SPY;
+                // The app is requesting to customize the caption bar, which means input on
+                // customizable/exclusion regions must go to the app instead of to the system.
+                // This may be accomplished with spy windows or custom touchable regions:
+                if (Flags.enableAccessibleCustomHeaders()) {
+                    // Set the touchable region of the caption to only the areas where input should
+                    // be handled by the system (i.e. non custom-excluded areas). The region will
+                    // be calculated based on occluding caption elements and exclusion areas
+                    // reported by the app.
+                    relayoutParams.mLimitTouchRegionToSystemAreas = true;
+                } else {
+                    // Allow input to fall through to the windows below so that the app can respond
+                    // to input events on their custom content.
+                    relayoutParams.mInputFeatures |= WindowManager.LayoutParams.INPUT_FEATURE_SPY;
+                }
             } else {
                 if (ENABLE_CAPTION_COMPAT_INSET_FORCE_CONSUMPTION.isTrue()) {
                     // Force-consume the caption bar insets when the app tries to hide the caption.
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java
index b016c755e323..a3c75bf33cde 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/WindowDecoration.java
@@ -127,7 +127,7 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
                     }
 
                     mDisplayController.removeDisplayWindowListener(this);
-                    relayout(mTaskInfo, mHasGlobalFocus);
+                    relayout(mTaskInfo, mHasGlobalFocus, mExclusionRegion);
                 }
             };
 
@@ -143,7 +143,7 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
     SurfaceControl mDecorationContainerSurface;
 
     SurfaceControl mCaptionContainerSurface;
-    private WindowlessWindowManager mCaptionWindowManager;
+    private CaptionWindowlessWindowManager mCaptionWindowManager;
     private SurfaceControlViewHost mViewHost;
     private Configuration mWindowDecorConfig;
     TaskDragResizer mTaskDragResizer;
@@ -152,6 +152,7 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
     boolean mIsStatusBarVisible;
     boolean mIsKeyguardVisibleAndOccluded;
     boolean mHasGlobalFocus;
+    final Region mExclusionRegion = Region.obtain();
 
     /** The most recent set of insets applied to this window decoration. */
     private WindowDecorationInsets mWindowDecorationInsets;
@@ -218,7 +219,8 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
      *                 constructor.
      * @param hasGlobalFocus Whether the task is focused
      */
-    abstract void relayout(RunningTaskInfo taskInfo, boolean hasGlobalFocus);
+    abstract void relayout(RunningTaskInfo taskInfo, boolean hasGlobalFocus,
+            @NonNull Region displayExclusionRegion);
 
     /**
      * Used by the {@link DragPositioningCallback} associated with the implementing class to
@@ -244,6 +246,7 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
             mTaskInfo = params.mRunningTaskInfo;
         }
         mHasGlobalFocus = params.mHasGlobalFocus;
+        mExclusionRegion.set(params.mDisplayExclusionRegion);
         final int oldLayoutResId = mLayoutResId;
         mLayoutResId = params.mLayoutResId;
 
@@ -402,7 +405,7 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
                 final int elementWidthPx =
                         resources.getDimensionPixelSize(element.mWidthResId);
                 boundingRects[i] =
-                        calculateBoundingRect(element, elementWidthPx, captionInsetsRect);
+                        calculateBoundingRectLocal(element, elementWidthPx, captionInsetsRect);
                 // Subtract the regions used by the caption elements, the rest is
                 // customizable.
                 if (params.hasInputFeatureSpy()) {
@@ -477,9 +480,8 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
         if (mCaptionWindowManager == null) {
             // Put caption under a container surface because ViewRootImpl sets the destination frame
             // of windowless window layers and BLASTBufferQueue#update() doesn't support offset.
-            mCaptionWindowManager = new WindowlessWindowManager(
-                    mTaskInfo.getConfiguration(), mCaptionContainerSurface,
-                    null /* hostInputToken */);
+            mCaptionWindowManager = new CaptionWindowlessWindowManager(
+                    mTaskInfo.getConfiguration(), mCaptionContainerSurface);
         }
         mCaptionWindowManager.setConfiguration(mTaskInfo.getConfiguration());
         final WindowManager.LayoutParams lp =
@@ -492,6 +494,14 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
         lp.setTitle("Caption of Task=" + mTaskInfo.taskId);
         lp.setTrustedOverlay();
         lp.inputFeatures = params.mInputFeatures;
+        final Rect localCaptionBounds = new Rect(
+                outResult.mCaptionX,
+                outResult.mCaptionY,
+                outResult.mCaptionX + outResult.mCaptionWidth,
+                outResult.mCaptionY + outResult.mCaptionHeight);
+        final Region touchableRegion = params.mLimitTouchRegionToSystemAreas
+                ? calculateLimitedTouchableRegion(params, localCaptionBounds)
+                : null;
         if (mViewHost == null) {
             Trace.beginSection("CaptionViewHostLayout-new");
             mViewHost = mSurfaceControlViewHostFactory.create(mDecorWindowContext, mDisplay,
@@ -503,6 +513,9 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
                 mViewHost.getRootSurfaceControl().applyTransactionOnDraw(onDrawTransaction);
             }
             outResult.mRootView.setPadding(0, params.mCaptionTopPadding, 0, 0);
+            if (params.mLimitTouchRegionToSystemAreas) {
+                mCaptionWindowManager.setTouchRegion(mViewHost, touchableRegion);
+            }
             mViewHost.setView(outResult.mRootView, lp);
             Trace.endSection();
         } else {
@@ -514,13 +527,71 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
                 mViewHost.getRootSurfaceControl().applyTransactionOnDraw(onDrawTransaction);
             }
             outResult.mRootView.setPadding(0, params.mCaptionTopPadding, 0, 0);
+            if (params.mLimitTouchRegionToSystemAreas) {
+                mCaptionWindowManager.setTouchRegion(mViewHost, touchableRegion);
+            }
             mViewHost.relayout(lp);
             Trace.endSection();
         }
+        if (touchableRegion != null) {
+            touchableRegion.recycle();
+        }
         Trace.endSection(); // CaptionViewHostLayout
     }
 
-    private Rect calculateBoundingRect(@NonNull OccludingCaptionElement element,
+    @NonNull
+    private Region calculateLimitedTouchableRegion(
+            RelayoutParams params,
+            @NonNull Rect localCaptionBounds) {
+        // Make caption bounds relative to display to align with exclusion region.
+        final Point positionInParent = params.mRunningTaskInfo.positionInParent;
+        final Rect captionBoundsInDisplay = new Rect(localCaptionBounds);
+        captionBoundsInDisplay.offsetTo(positionInParent.x, positionInParent.y);
+
+        final Region boundingRects = calculateBoundingRectsRegion(params, captionBoundsInDisplay);
+
+        final Region customizedRegion = Region.obtain();
+        customizedRegion.set(captionBoundsInDisplay);
+        customizedRegion.op(boundingRects, Region.Op.DIFFERENCE);
+        customizedRegion.op(params.mDisplayExclusionRegion, Region.Op.INTERSECT);
+
+        final Region touchableRegion = Region.obtain();
+        touchableRegion.set(captionBoundsInDisplay);
+        touchableRegion.op(customizedRegion, Region.Op.DIFFERENCE);
+        // Return resulting region back to window coordinates.
+        touchableRegion.translate(-positionInParent.x, -positionInParent.y);
+
+        boundingRects.recycle();
+        customizedRegion.recycle();
+        return touchableRegion;
+    }
+
+    @NonNull
+    private Region calculateBoundingRectsRegion(
+            @NonNull RelayoutParams params,
+            @NonNull Rect captionBoundsInDisplay) {
+        final int numOfElements = params.mOccludingCaptionElements.size();
+        final Region region = Region.obtain();
+        if (numOfElements == 0) {
+            // The entire caption is a bounding rect.
+            region.set(captionBoundsInDisplay);
+            return region;
+        }
+        final Resources resources = mDecorWindowContext.getResources();
+        for (int i = 0; i < numOfElements; i++) {
+            final OccludingCaptionElement element = params.mOccludingCaptionElements.get(i);
+            final int elementWidthPx = resources.getDimensionPixelSize(element.mWidthResId);
+            final Rect boundingRect = calculateBoundingRectLocal(element, elementWidthPx,
+                    captionBoundsInDisplay);
+            // Bounding rect is initially calculated relative to the caption, so offset it to make
+            // it relative to the display.
+            boundingRect.offset(captionBoundsInDisplay.left, captionBoundsInDisplay.top);
+            region.union(boundingRect);
+        }
+        return region;
+    }
+
+    private Rect calculateBoundingRectLocal(@NonNull OccludingCaptionElement element,
             int elementWidthPx, @NonNull Rect captionRect) {
         switch (element.mAlignment) {
             case START -> {
@@ -539,7 +610,7 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
         mIsKeyguardVisibleAndOccluded = visible && occluded;
         final boolean changed = prevVisAndOccluded != mIsKeyguardVisibleAndOccluded;
         if (changed) {
-            relayout(mTaskInfo, mHasGlobalFocus);
+            relayout(mTaskInfo, mHasGlobalFocus, mExclusionRegion);
         }
     }
 
@@ -549,10 +620,14 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
         final boolean changed = prevStatusBarVisibility != mIsStatusBarVisible;
 
         if (changed) {
-            relayout(mTaskInfo, mHasGlobalFocus);
+            relayout(mTaskInfo, mHasGlobalFocus, mExclusionRegion);
         }
     }
 
+    void onExclusionRegionChanged(@NonNull Region exclusionRegion) {
+        relayout(mTaskInfo, mHasGlobalFocus, exclusionRegion);
+    }
+
     /**
      * Update caption visibility state and views.
      */
@@ -751,9 +826,11 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
         int mCaptionHeightId;
         int mCaptionWidthId;
         final List<OccludingCaptionElement> mOccludingCaptionElements = new ArrayList<>();
+        boolean mLimitTouchRegionToSystemAreas;
         int mInputFeatures;
         boolean mIsInsetSource = true;
         @InsetsSource.Flags int mInsetSourceFlags;
+        final Region mDisplayExclusionRegion = Region.obtain();
 
         int mShadowRadiusId;
         int mCornerRadius;
@@ -772,9 +849,11 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
             mCaptionHeightId = Resources.ID_NULL;
             mCaptionWidthId = Resources.ID_NULL;
             mOccludingCaptionElements.clear();
+            mLimitTouchRegionToSystemAreas = false;
             mInputFeatures = 0;
             mIsInsetSource = true;
             mInsetSourceFlags = 0;
+            mDisplayExclusionRegion.setEmpty();
 
             mShadowRadiusId = Resources.ID_NULL;
             mCornerRadius = 0;
@@ -830,6 +909,19 @@ public abstract class WindowDecoration<T extends View & TaskFocusStateConsumer>
         }
     }
 
+    private static class CaptionWindowlessWindowManager extends WindowlessWindowManager {
+        CaptionWindowlessWindowManager(
+                @NonNull Configuration configuration,
+                @NonNull SurfaceControl rootSurface) {
+            super(configuration, rootSurface, /* hostInputToken= */ null);
+        }
+
+        /** Set the view host's touchable region. */
+        void setTouchRegion(@NonNull SurfaceControlViewHost viewHost, @NonNull Region region) {
+            setTouchRegion(viewHost.getWindowToken().asBinder(), region);
+        }
+    }
+
     @VisibleForTesting
     public interface SurfaceControlViewHostFactory {
         default SurfaceControlViewHost create(Context c, Display d, WindowlessWindowManager wmm) {
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/CaptionWindowDecorationTests.kt b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/CaptionWindowDecorationTests.kt
index 5ebf5170bf86..59141ca39487 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/CaptionWindowDecorationTests.kt
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/CaptionWindowDecorationTests.kt
@@ -19,6 +19,7 @@ package com.android.wm.shell.windowdecor
 import android.app.ActivityManager
 import android.app.WindowConfiguration
 import android.content.ComponentName
+import android.graphics.Region
 import android.testing.AndroidTestingRunner
 import android.view.Display
 import android.view.InsetsState
@@ -33,6 +34,9 @@ import org.junit.runner.RunWith
 @SmallTest
 @RunWith(AndroidTestingRunner::class)
 class CaptionWindowDecorationTests : ShellTestCase() {
+
+    private val exclusionRegion = Region.obtain()
+
     @Test
     fun updateRelayoutParams_freeformAndTransparentAppearance_allowsInputFallthrough() {
         val taskInfo = createTaskInfo()
@@ -50,7 +54,8 @@ class CaptionWindowDecorationTests : ShellTestCase() {
             true /* isStatusBarVisible */,
             false /* isKeyguardVisibleAndOccluded */,
             InsetsState(),
-            true /* hasGlobalFocus */
+            true /* hasGlobalFocus */,
+            exclusionRegion
         )
 
         Truth.assertThat(relayoutParams.hasInputFeatureSpy()).isTrue()
@@ -72,7 +77,8 @@ class CaptionWindowDecorationTests : ShellTestCase() {
             true /* isStatusBarVisible */,
             false /* isKeyguardVisibleAndOccluded */,
             InsetsState(),
-            true /* hasGlobalFocus */
+            true /* hasGlobalFocus */,
+            exclusionRegion
         )
 
         Truth.assertThat(relayoutParams.hasInputFeatureSpy()).isFalse()
@@ -90,7 +96,8 @@ class CaptionWindowDecorationTests : ShellTestCase() {
             true /* isStatusBarVisible */,
             false /* isKeyguardVisibleAndOccluded */,
             InsetsState(),
-            true /* hasGlobalFocus */
+            true /* hasGlobalFocus */,
+            exclusionRegion
         )
         Truth.assertThat(relayoutParams.mOccludingCaptionElements.size).isEqualTo(2)
         Truth.assertThat(relayoutParams.mOccludingCaptionElements[0].mAlignment).isEqualTo(
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModelTests.kt b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModelTests.kt
index 956100d9bc03..be664f86e9f5 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModelTests.kt
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModelTests.kt
@@ -30,6 +30,7 @@ import android.content.Intent
 import android.content.Intent.ACTION_MAIN
 import android.content.pm.ActivityInfo
 import android.graphics.Rect
+import android.graphics.Region
 import android.hardware.display.DisplayManager
 import android.hardware.display.VirtualDisplay
 import android.hardware.input.InputManager
@@ -48,6 +49,7 @@ import android.testing.TestableLooper.RunWithLooper
 import android.util.SparseArray
 import android.view.Choreographer
 import android.view.Display.DEFAULT_DISPLAY
+import android.view.ISystemGestureExclusionListener
 import android.view.IWindowManager
 import android.view.InputChannel
 import android.view.InputMonitor
@@ -84,7 +86,6 @@ import com.android.wm.shell.common.DisplayController
 import com.android.wm.shell.common.DisplayInsetsController
 import com.android.wm.shell.common.DisplayLayout
 import com.android.wm.shell.common.MultiInstanceHelper
-import com.android.wm.shell.common.ShellExecutor
 import com.android.wm.shell.common.SyncTransactionQueue
 import com.android.wm.shell.desktopmode.DesktopActivityOrientationChangeHandler
 import com.android.wm.shell.desktopmode.DesktopModeEventLogger
@@ -131,6 +132,7 @@ import org.mockito.Mockito.times
 import org.mockito.kotlin.KArgumentCaptor
 import org.mockito.kotlin.verify
 import org.mockito.kotlin.any
+import org.mockito.kotlin.anyOrNull
 import org.mockito.kotlin.argThat
 import org.mockito.kotlin.argumentCaptor
 import org.mockito.kotlin.doNothing
@@ -175,7 +177,7 @@ class DesktopModeWindowDecorViewModelTests : ShellTestCase() {
     @Mock private lateinit var mockInputMonitorFactory:
             DesktopModeWindowDecorViewModel.InputMonitorFactory
     @Mock private lateinit var mockShellController: ShellController
-    @Mock private lateinit var mockShellExecutor: ShellExecutor
+    private val testShellExecutor = TestShellExecutor()
     @Mock private lateinit var mockAppHeaderViewHolderFactory: AppHeaderViewHolder.Factory
     @Mock private lateinit var mockRootTaskDisplayAreaOrganizer: RootTaskDisplayAreaOrganizer
     @Mock private lateinit var mockShellCommandHandler: ShellCommandHandler
@@ -230,13 +232,13 @@ class DesktopModeWindowDecorViewModelTests : ShellTestCase() {
 
         spyContext = spy(mContext)
         doNothing().`when`(spyContext).startActivity(any())
-        shellInit = ShellInit(mockShellExecutor)
+        shellInit = ShellInit(testShellExecutor)
         windowDecorByTaskIdSpy.clear()
         spyContext.addMockSystemService(InputManager::class.java, mockInputManager)
         desktopModeEventLogger = mock<DesktopModeEventLogger>()
         desktopModeWindowDecorViewModel = DesktopModeWindowDecorViewModel(
                 spyContext,
-                mockShellExecutor,
+                testShellExecutor,
                 mockMainHandler,
                 mockMainChoreographer,
                 bgExecutor,
@@ -1321,11 +1323,11 @@ class DesktopModeWindowDecorViewModelTests : ShellTestCase() {
 
         decoration.mHasGlobalFocus = true
         desktopModeWindowDecorViewModel.onTaskInfoChanged(task)
-        verify(decoration).relayout(task, true)
+        verify(decoration).relayout(eq(task), eq(true), anyOrNull())
 
         decoration.mHasGlobalFocus = false
         desktopModeWindowDecorViewModel.onTaskInfoChanged(task)
-        verify(decoration).relayout(task, false)
+        verify(decoration).relayout(eq(task), eq(false), anyOrNull())
     }
 
     @Test
@@ -1342,17 +1344,66 @@ class DesktopModeWindowDecorViewModelTests : ShellTestCase() {
 
         task.isFocused = true
         desktopModeWindowDecorViewModel.onTaskInfoChanged(task)
-        verify(decoration).relayout(task, true)
+        verify(decoration).relayout(eq(task), eq(true), anyOrNull())
 
         task.isFocused = false
         desktopModeWindowDecorViewModel.onTaskInfoChanged(task)
-        verify(decoration).relayout(task, false)
+        verify(decoration).relayout(eq(task), eq(false), anyOrNull())
+    }
+
+    @Test
+    fun testGestureExclusionChanged_updatesDecorations() {
+        val captor = argumentCaptor<ISystemGestureExclusionListener>()
+        verify(mockWindowManager)
+            .registerSystemGestureExclusionListener(captor.capture(), eq(DEFAULT_DISPLAY))
+        val task = createOpenTaskDecoration(
+            windowingMode = WINDOWING_MODE_FREEFORM,
+            displayId = DEFAULT_DISPLAY
+        )
+        val task2 = createOpenTaskDecoration(
+            windowingMode = WINDOWING_MODE_FREEFORM,
+            displayId = DEFAULT_DISPLAY
+        )
+        val newRegion = Region.obtain().apply {
+            set(Rect(0, 0, 1600, 80))
+        }
+
+        captor.firstValue.onSystemGestureExclusionChanged(DEFAULT_DISPLAY, newRegion, newRegion)
+        testShellExecutor.flushAll()
+
+        verify(task).onExclusionRegionChanged(newRegion)
+        verify(task2).onExclusionRegionChanged(newRegion)
+    }
+
+    @Test
+    fun testGestureExclusionChanged_otherDisplay_skipsDecorationUpdate() {
+        val captor = argumentCaptor<ISystemGestureExclusionListener>()
+        verify(mockWindowManager)
+            .registerSystemGestureExclusionListener(captor.capture(), eq(DEFAULT_DISPLAY))
+        val task = createOpenTaskDecoration(
+            windowingMode = WINDOWING_MODE_FREEFORM,
+            displayId = DEFAULT_DISPLAY
+        )
+        val task2 = createOpenTaskDecoration(
+            windowingMode = WINDOWING_MODE_FREEFORM,
+            displayId = 2
+        )
+        val newRegion = Region.obtain().apply {
+            set(Rect(0, 0, 1600, 80))
+        }
+
+        captor.firstValue.onSystemGestureExclusionChanged(DEFAULT_DISPLAY, newRegion, newRegion)
+        testShellExecutor.flushAll()
+
+        verify(task).onExclusionRegionChanged(newRegion)
+        verify(task2, never()).onExclusionRegionChanged(newRegion)
     }
 
     private fun createOpenTaskDecoration(
         @WindowingMode windowingMode: Int,
         taskSurface: SurfaceControl = SurfaceControl(),
         requestingImmersive: Boolean = false,
+        displayId: Int = DEFAULT_DISPLAY,
         onMaxOrRestoreListenerCaptor: ArgumentCaptor<Function0<Unit>> =
             forClass(Function0::class.java) as ArgumentCaptor<Function0<Unit>>,
         onImmersiveOrRestoreListenerCaptor: KArgumentCaptor<() -> Unit> =
@@ -1376,6 +1427,7 @@ class DesktopModeWindowDecorViewModelTests : ShellTestCase() {
     ): DesktopModeWindowDecoration {
         val decor = setUpMockDecorationForTask(createTask(
             windowingMode = windowingMode,
+            displayId = displayId,
             requestingImmersive = requestingImmersive
         ))
         onTaskOpening(decor.mTaskInfo, taskSurface)
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorationTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorationTests.java
index 884ad5c13f6a..1d2d0f078817 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorationTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorationTests.java
@@ -64,6 +64,7 @@ import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.PointF;
 import android.graphics.Rect;
+import android.graphics.Region;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.SystemProperties;
@@ -224,6 +225,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
     private TestableContext mTestableContext;
     private final ShellExecutor mBgExecutor = new TestShellExecutor();
     private final AssistContent mAssistContent = new AssistContent();
+    private final Region mExclusionRegion = Region.obtain();
 
     /** Set up run before test class. */
     @BeforeClass
@@ -283,7 +285,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         final DesktopModeWindowDecoration spyWindowDecor =
                 spy(createWindowDecoration(taskInfo));
 
-        spyWindowDecor.relayout(taskInfo, false /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, false /* hasGlobalFocus */, mExclusionRegion);
 
         // Menus should close if open before the task being invisible causes relayout to return.
         verify(spyWindowDecor).closeHandleMenu();
@@ -303,7 +305,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mShadowRadiusId).isNotEqualTo(Resources.ID_NULL);
     }
@@ -324,7 +327,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mCornerRadius).isGreaterThan(0);
     }
@@ -350,7 +354,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mWindowDecorConfig.densityDpi).isEqualTo(customTaskDensity);
     }
@@ -377,12 +382,14 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mWindowDecorConfig.densityDpi).isEqualTo(systemDensity);
     }
 
     @Test
+    @DisableFlags(Flags.FLAG_ENABLE_ACCESSIBLE_CUSTOM_HEADERS)
     public void updateRelayoutParams_freeformAndTransparentAppearance_allowsInputFallthrough() {
         final ActivityManager.RunningTaskInfo taskInfo = createTaskInfo(/* visible= */ true);
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FREEFORM);
@@ -400,12 +407,39 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.hasInputFeatureSpy()).isTrue();
     }
 
     @Test
+    @EnableFlags(Flags.FLAG_ENABLE_ACCESSIBLE_CUSTOM_HEADERS)
+    public void updateRelayoutParams_freeformAndTransparentAppearance_limitedTouchRegion() {
+        final ActivityManager.RunningTaskInfo taskInfo = createTaskInfo(/* visible= */ true);
+        taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FREEFORM);
+        taskInfo.taskDescription.setTopOpaqueSystemBarsAppearance(
+                APPEARANCE_TRANSPARENT_CAPTION_BAR_BACKGROUND);
+        final RelayoutParams relayoutParams = new RelayoutParams();
+
+        DesktopModeWindowDecoration.updateRelayoutParams(
+                relayoutParams,
+                mTestableContext,
+                taskInfo,
+                /* applyStartTransactionOnDraw= */ true,
+                /* shouldSetTaskPositionAndCrop */ false,
+                /* isStatusBarVisible */ true,
+                /* isKeyguardVisibleAndOccluded */ false,
+                /* inFullImmersiveMode */ false,
+                new InsetsState(),
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
+
+        assertThat(relayoutParams.mLimitTouchRegionToSystemAreas).isTrue();
+    }
+
+    @Test
+    @DisableFlags(Flags.FLAG_ENABLE_ACCESSIBLE_CUSTOM_HEADERS)
     public void updateRelayoutParams_freeformButOpaqueAppearance_disallowsInputFallthrough() {
         final ActivityManager.RunningTaskInfo taskInfo = createTaskInfo(/* visible= */ true);
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FREEFORM);
@@ -422,12 +456,38 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.hasInputFeatureSpy()).isFalse();
     }
 
     @Test
+    @EnableFlags(Flags.FLAG_ENABLE_ACCESSIBLE_CUSTOM_HEADERS)
+    public void updateRelayoutParams_freeformButOpaqueAppearance_unlimitedTouchRegion() {
+        final ActivityManager.RunningTaskInfo taskInfo = createTaskInfo(/* visible= */ true);
+        taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FREEFORM);
+        taskInfo.taskDescription.setTopOpaqueSystemBarsAppearance(0);
+        final RelayoutParams relayoutParams = new RelayoutParams();
+
+        DesktopModeWindowDecoration.updateRelayoutParams(
+                relayoutParams,
+                mTestableContext,
+                taskInfo,
+                /* applyStartTransactionOnDraw= */ true,
+                /* shouldSetTaskPositionAndCrop */ false,
+                /* isStatusBarVisible */ true,
+                /* isKeyguardVisibleAndOccluded */ false,
+                /* inFullImmersiveMode */ false,
+                new InsetsState(),
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
+
+        assertThat(relayoutParams.mLimitTouchRegionToSystemAreas).isFalse();
+    }
+
+    @Test
+    @DisableFlags(Flags.FLAG_ENABLE_ACCESSIBLE_CUSTOM_HEADERS)
     public void updateRelayoutParams_fullscreen_disallowsInputFallthrough() {
         final ActivityManager.RunningTaskInfo taskInfo = createTaskInfo(/* visible= */ true);
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
@@ -443,12 +503,36 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.hasInputFeatureSpy()).isFalse();
     }
 
     @Test
+    @EnableFlags(Flags.FLAG_ENABLE_ACCESSIBLE_CUSTOM_HEADERS)
+    public void updateRelayoutParams_fullscreen_unlimitedTouchRegion() {
+        final ActivityManager.RunningTaskInfo taskInfo = createTaskInfo(/* visible= */ true);
+        taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
+        final RelayoutParams relayoutParams = new RelayoutParams();
+
+        DesktopModeWindowDecoration.updateRelayoutParams(
+                relayoutParams,
+                mTestableContext,
+                taskInfo,
+                /* applyStartTransactionOnDraw= */ true,
+                /* shouldSetTaskPositionAndCrop */ false,
+                /* isStatusBarVisible */ true,
+                /* isKeyguardVisibleAndOccluded */ false,
+                /* inFullImmersiveMode */ false,
+                new InsetsState(),
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
+
+        assertThat(relayoutParams.mLimitTouchRegionToSystemAreas).isFalse();
+    }
+
+    @Test
     public void updateRelayoutParams_freeform_inputChannelNeeded() {
         final ActivityManager.RunningTaskInfo taskInfo = createTaskInfo(/* visible= */ true);
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FREEFORM);
@@ -464,7 +548,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(hasNoInputChannelFeature(relayoutParams)).isFalse();
     }
@@ -486,7 +571,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(hasNoInputChannelFeature(relayoutParams)).isTrue();
     }
@@ -508,7 +594,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(hasNoInputChannelFeature(relayoutParams)).isTrue();
     }
@@ -531,7 +618,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat((relayoutParams.mInsetSourceFlags & FLAG_FORCE_CONSUMING) != 0).isTrue();
     }
@@ -555,7 +643,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat((relayoutParams.mInsetSourceFlags & FLAG_FORCE_CONSUMING) == 0).isTrue();
     }
@@ -577,7 +666,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(
                 (relayoutParams.mInsetSourceFlags & FLAG_FORCE_CONSUMING_OPAQUE_CAPTION_BAR) != 0)
@@ -601,7 +691,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(
                 (relayoutParams.mInsetSourceFlags & FLAG_FORCE_CONSUMING_OPAQUE_CAPTION_BAR) == 0)
@@ -631,7 +722,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ true,
                 insetsState,
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         // Takes status bar inset as padding, ignores caption bar inset.
         assertThat(relayoutParams.mCaptionTopPadding).isEqualTo(50);
@@ -654,7 +746,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ true,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mIsInsetSource).isFalse();
     }
@@ -676,7 +769,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         // Header is always shown because it's assumed the status bar is always visible.
         assertThat(relayoutParams.mIsCaptionVisible).isTrue();
@@ -698,7 +792,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mIsCaptionVisible).isTrue();
     }
@@ -719,7 +814,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mIsCaptionVisible).isFalse();
     }
@@ -740,7 +836,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ true,
                 /* inFullImmersiveMode */ false,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mIsCaptionVisible).isFalse();
     }
@@ -762,7 +859,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ true,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mIsCaptionVisible).isTrue();
 
@@ -776,7 +874,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ false,
                 /* inFullImmersiveMode */ true,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mIsCaptionVisible).isFalse();
     }
@@ -798,7 +897,8 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
                 /* isKeyguardVisibleAndOccluded */ true,
                 /* inFullImmersiveMode */ true,
                 new InsetsState(),
-                /* hasGlobalFocus= */ true);
+                /* hasGlobalFocus= */ true,
+                mExclusionRegion);
 
         assertThat(relayoutParams.mIsCaptionVisible).isFalse();
     }
@@ -809,7 +909,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         final DesktopModeWindowDecoration spyWindowDecor = spy(createWindowDecoration(taskInfo));
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockTransaction).apply();
         verify(mMockRootSurfaceControl, never()).applyTransactionOnDraw(any());
@@ -824,7 +924,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         // Make non-resizable to avoid dealing with input-permissions (MONITOR_INPUT)
         taskInfo.isResizeable = false;
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockTransaction, never()).apply();
         verify(mMockRootSurfaceControl).applyTransactionOnDraw(mMockTransaction);
@@ -836,7 +936,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         final DesktopModeWindowDecoration spyWindowDecor = spy(createWindowDecoration(taskInfo));
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockSurfaceControlViewHostFactory, never()).create(any(), any(), any());
     }
@@ -848,7 +948,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
 
         ArgumentCaptor<Runnable> runnableArgument = ArgumentCaptor.forClass(Runnable.class);
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         // Once for view host, the other for the AppHandle input layer.
         verify(mMockHandler, times(2)).post(runnableArgument.capture());
@@ -865,7 +965,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         // Make non-resizable to avoid dealing with input-permissions (MONITOR_INPUT)
         taskInfo.isResizeable = false;
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockSurfaceControlViewHostFactory).create(any(), any(), any());
         verify(mMockHandler, never()).post(any());
@@ -877,11 +977,11 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         final DesktopModeWindowDecoration spyWindowDecor = spy(createWindowDecoration(taskInfo));
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
         ArgumentCaptor<Runnable> runnableArgument = ArgumentCaptor.forClass(Runnable.class);
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
         // Once for view host, the other for the AppHandle input layer.
         verify(mMockHandler, times(2)).post(runnableArgument.capture());
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockHandler).removeCallbacks(runnableArgument.getValue());
     }
@@ -892,7 +992,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         final DesktopModeWindowDecoration spyWindowDecor = spy(createWindowDecoration(taskInfo));
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
         ArgumentCaptor<Runnable> runnableArgument = ArgumentCaptor.forClass(Runnable.class);
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
         // Once for view host, the other for the AppHandle input layer.
         verify(mMockHandler, times(2)).post(runnableArgument.capture());
 
@@ -1132,7 +1232,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         runnableArgument.getValue().run();
 
         // Relayout decor with same captured link
-        decor.relayout(taskInfo, true /* hasGlobalFocus */);
+        decor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         // Verify handle menu's browser link not set to captured link since link is expired
         createHandleMenu(decor);
@@ -1313,7 +1413,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         final DesktopModeWindowDecoration spyWindowDecor = spy(createWindowDecoration(taskInfo));
         taskInfo.configuration.windowConfiguration.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockCaptionHandleRepository, never()).notifyCaptionChanged(any());
     }
@@ -1330,7 +1430,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         ArgumentCaptor<CaptionState> captionStateArgumentCaptor = ArgumentCaptor.forClass(
                 CaptionState.class);
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockCaptionHandleRepository, atLeastOnce()).notifyCaptionChanged(
                 captionStateArgumentCaptor.capture());
@@ -1357,7 +1457,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         ArgumentCaptor<CaptionState> captionStateArgumentCaptor = ArgumentCaptor.forClass(
                 CaptionState.class);
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
         verify(mMockAppHeaderViewHolder, atLeastOnce()).runOnAppChipGlobalLayout(
                 runnableArgumentCaptor.capture());
         runnableArgumentCaptor.getValue().invoke();
@@ -1380,7 +1480,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         ArgumentCaptor<CaptionState> captionStateArgumentCaptor = ArgumentCaptor.forClass(
                 CaptionState.class);
 
-        spyWindowDecor.relayout(taskInfo, false /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, false /* hasGlobalFocus */, mExclusionRegion);
 
         verify(mMockCaptionHandleRepository, atLeastOnce()).notifyCaptionChanged(
                 captionStateArgumentCaptor.capture());
@@ -1400,7 +1500,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         ArgumentCaptor<CaptionState> captionStateArgumentCaptor = ArgumentCaptor.forClass(
                 CaptionState.class);
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
         createHandleMenu(spyWindowDecor);
 
         verify(mMockCaptionHandleRepository, atLeastOnce()).notifyCaptionChanged(
@@ -1425,7 +1525,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         ArgumentCaptor<CaptionState> captionStateArgumentCaptor = ArgumentCaptor.forClass(
                 CaptionState.class);
 
-        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+        spyWindowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
         createHandleMenu(spyWindowDecor);
         spyWindowDecor.closeHandleMenu();
 
@@ -1543,7 +1643,7 @@ public class DesktopModeWindowDecorationTests extends ShellTestCase {
         windowDecor.setOpenInBrowserClickListener(mMockOpenInBrowserClickListener);
         windowDecor.mDecorWindowContext = mContext;
         if (relayout) {
-            windowDecor.relayout(taskInfo, true /* hasGlobalFocus */);
+            windowDecor.relayout(taskInfo, true /* hasGlobalFocus */, mExclusionRegion);
         }
         return windowDecor;
     }
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java
index 8e0434cb28f7..534803db5fe0 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/windowdecor/WindowDecorationTests.java
@@ -60,6 +60,7 @@ import android.content.res.Resources;
 import android.graphics.Color;
 import android.graphics.Point;
 import android.graphics.Rect;
+import android.graphics.Region;
 import android.platform.test.flag.junit.SetFlagsRule;
 import android.testing.AndroidTestingRunner;
 import android.util.DisplayMetrics;
@@ -508,7 +509,7 @@ public class WindowDecorationTests extends ShellTestCase {
         final TestWindowDecoration windowDecor = createWindowDecoration(taskInfo);
 
         windowDecor.relayout(taskInfo, true /* applyStartTransactionOnDraw */,
-                true /* hasGlobalFocus */);
+                true /* hasGlobalFocus */, Region.obtain());
 
         verify(mMockRootSurfaceControl).applyTransactionOnDraw(mMockSurfaceControlStartT);
     }
@@ -525,7 +526,7 @@ public class WindowDecorationTests extends ShellTestCase {
         mRelayoutParams.mCaptionTopPadding = 50;
 
         windowDecor.relayout(taskInfo, false /* applyStartTransactionOnDraw */,
-                true /* hasGlobalFocus */);
+                true /* hasGlobalFocus */, Region.obtain());
 
         assertEquals(50, mRelayoutResult.mCaptionTopPadding);
     }
@@ -944,7 +945,7 @@ public class WindowDecorationTests extends ShellTestCase {
 
         decor.onInsetsStateChanged(createInsetsState(statusBars(), false /* visible */));
 
-        verify(decor, times(2)).relayout(task, true /* hasGlobalFocus */);
+        verify(decor, times(2)).relayout(any(), any(), any(), any(), any(), any());
     }
 
     @Test
@@ -958,7 +959,7 @@ public class WindowDecorationTests extends ShellTestCase {
 
         decor.onInsetsStateChanged(createInsetsState(statusBars(), true /* visible */));
 
-        verify(decor, times(1)).relayout(task, true /* hasGlobalFocus */);
+        verify(decor, times(1)).relayout(any(), any(), any(), any(), any(), any());
     }
 
     @Test
@@ -973,7 +974,7 @@ public class WindowDecorationTests extends ShellTestCase {
         decor.onKeyguardStateChanged(true /* visible */, true /* occluding */);
 
         assertTrue(decor.mIsKeyguardVisibleAndOccluded);
-        verify(decor, times(2)).relayout(task, true /* hasGlobalFocus */);
+        verify(decor, times(2)).relayout(any(), any(), any(), any(), any(), any());
     }
 
     @Test
@@ -987,7 +988,7 @@ public class WindowDecorationTests extends ShellTestCase {
 
         decor.onKeyguardStateChanged(false /* visible */, true /* occluding */);
 
-        verify(decor, times(1)).relayout(task, true /* hasGlobalFocus */);
+        verify(decor, times(1)).relayout(any(), any(), any(), any(), any(), any());
     }
 
     private ActivityManager.RunningTaskInfo createTaskInfo() {
@@ -1061,9 +1062,16 @@ public class WindowDecorationTests extends ShellTestCase {
                     surfaceControlViewHostFactory, desktopModeEventLogger);
         }
 
-        @Override
         void relayout(ActivityManager.RunningTaskInfo taskInfo, boolean hasGlobalFocus) {
-            relayout(taskInfo, false /* applyStartTransactionOnDraw */, hasGlobalFocus);
+            relayout(taskInfo, false /* applyStartTransactionOnDraw */, hasGlobalFocus,
+                    Region.obtain());
+        }
+
+        @Override
+        void relayout(ActivityManager.RunningTaskInfo taskInfo, boolean hasGlobalFocus,
+                @NonNull Region displayExclusionRegion) {
+            relayout(taskInfo, false /* applyStartTransactionOnDraw */, hasGlobalFocus,
+                    displayExclusionRegion);
         }
 
         @Override
@@ -1085,11 +1093,13 @@ public class WindowDecorationTests extends ShellTestCase {
         }
 
         void relayout(ActivityManager.RunningTaskInfo taskInfo,
-                boolean applyStartTransactionOnDraw, boolean hasGlobalFocus) {
+                boolean applyStartTransactionOnDraw, boolean hasGlobalFocus,
+                @NonNull Region displayExclusionRegion) {
             mRelayoutParams.mRunningTaskInfo = taskInfo;
             mRelayoutParams.mApplyStartTransactionOnDraw = applyStartTransactionOnDraw;
             mRelayoutParams.mLayoutResId = R.layout.caption_layout;
             mRelayoutParams.mHasGlobalFocus = hasGlobalFocus;
+            mRelayoutParams.mDisplayExclusionRegion.set(displayExclusionRegion);
             relayout(mRelayoutParams, mMockSurfaceControlStartT, mMockSurfaceControlFinishT,
                     mMockWindowContainerTransaction, mMockView, mRelayoutResult);
         }