Reduce the window tap exclude region for child above it (2b210c23) · Commits · e / os / android_frameworks_base

core/java/android/app/ActivityView.java

+39 −10

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import android.content.ComponentName;
		import android.content.Context;
		import android.content.Intent;
		import android.graphics.Insets;
		import android.graphics.Region;
		import android.hardware.display.DisplayManager;
		import android.hardware.display.VirtualDisplay;
		import android.hardware.input.InputManager;
		@@ -46,6 +47,7 @@ import android.view.SurfaceSession;
		import android.view.SurfaceView;
		import android.view.View;
		import android.view.ViewGroup;
		import android.view.ViewParent;
		import android.view.WindowManager;
		import android.view.WindowManagerGlobal;

		@@ -81,6 +83,9 @@ public class ActivityView extends ViewGroup {
		// Temp container to store view coordinates in window.
		private final int[] mLocationInWindow = new int[2];

		// The latest tap exclude region that we've sent to WM.
		private final Region mTapExcludeRegion = new Region();

		private TaskStackListener mTaskStackListener;

		private final CloseGuard mGuard = CloseGuard.get();
		@@ -279,11 +284,11 @@ public class ActivityView extends ViewGroup {
		}

		/**
		* Triggers an update of {@link ActivityView}'s location in window to properly set touch exclude
		* Triggers an update of {@link ActivityView}'s location in window to properly set tap exclude
		* regions and avoid focus switches by touches on this view.
		*/
		public void onLocationChanged() {
		updateLocation();
		updateTapExcludeRegion();
		}

		@Override
		@@ -291,15 +296,38 @@ public class ActivityView extends ViewGroup {
		mSurfaceView.layout(0 /* left /, 0 / top /, r - l / right /, b - t / bottom */);
		}

		/** Send current location and size to the WM to set tap exclude region for this view. */
		private void updateLocation() {
		@Override
		public boolean gatherTransparentRegion(Region region) {
		// The tap exclude region may be affected by any view on top of it, so we detect the
		// possible change by monitoring this function.
		updateTapExcludeRegion();
		return super.gatherTransparentRegion(region);
		}

		/** Compute and send current tap exclude region to WM for this view. */
		private void updateTapExcludeRegion() {
		if (!isAttachedToWindow()) {
		return;
		}
		if (!canReceivePointerEvents()) {
		cleanTapExcludeRegion();
		return;
		}
		try {
		getLocationInWindow(mLocationInWindow);
		final int x = mLocationInWindow[0];
		final int y = mLocationInWindow[1];
		mTapExcludeRegion.set(x, y, x + getWidth(), y + getHeight());

		// There might be views on top of us. We need to subtract those areas from the tap
		// exclude region.
		final ViewParent parent = getParent();
		if (parent instanceof ViewGroup) {
		((ViewGroup) parent).subtractObscuredTouchableRegion(mTapExcludeRegion, this);
		}

		WindowManagerGlobal.getWindowSession().updateTapExcludeRegion(getWindow(), hashCode(),
		mLocationInWindow[0], mLocationInWindow[1], getWidth(), getHeight());
		mTapExcludeRegion);
		} catch (RemoteException e) {
		e.rethrowAsRuntimeException();
		}
		@@ -322,7 +350,7 @@ public class ActivityView extends ViewGroup {
		mVirtualDisplay.setDisplayState(true);
		}

		updateLocation();
		updateTapExcludeRegion();
		}

		@Override
		@@ -330,7 +358,7 @@ public class ActivityView extends ViewGroup {
		if (mVirtualDisplay != null) {
		mVirtualDisplay.resize(width, height, getBaseDisplayDensity());
		}
		updateLocation();
		updateTapExcludeRegion();
		}

		@Override
		@@ -460,13 +488,14 @@ public class ActivityView extends ViewGroup {

		/** Report to server that tap exclude region on hosting display should be cleared. */
		private void cleanTapExcludeRegion() {
		if (!isAttachedToWindow()) {
		if (!isAttachedToWindow() \|\| mTapExcludeRegion.isEmpty()) {
		return;
		}
		// Update tap exclude region with an empty rect to clean the state on server.
		// Update tap exclude region with a null region to clean the state on server.
		try {
		WindowManagerGlobal.getWindowSession().updateTapExcludeRegion(getWindow(), hashCode(),
		0 /* left /, 0 / top /, 0 / width /, 0 / height */);
		null /* region */);
		mTapExcludeRegion.setEmpty();
		} catch (RemoteException e) {
		e.rethrowAsRuntimeException();
		}

core/java/android/view/IWindowSession.aidl

+4 −5

Original line number	Diff line number	Diff line
		@@ -255,12 +255,11 @@ interface IWindowSession {
		void updatePointerIcon(IWindow window);

		/**
		* Update a tap exclude region with a rectangular area identified by provided id in the window.
		* Touches on this region will not switch focus to this window. Passing an empty rect will
		* remove the area from the exclude region of this window.
		* Update a tap exclude region identified by provided id in the window. Touches on this region
		* will neither be dispatched to this window nor change the focus to this window. Passing an
		* invalid region will remove the area from the exclude region of this window.
		*/
		void updateTapExcludeRegion(IWindow window, int regionId, int left, int top, int width,
		int height);
		void updateTapExcludeRegion(IWindow window, int regionId, in Region region);

		/**
		* Called when the client has changed the local insets state, and now the server should reflect

core/java/android/view/View.java

+10 −0

Original line number	Diff line number	Diff line
		@@ -13898,6 +13898,16 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
		.getAccessibilityFocusedHost() == this);
		}

		/**
		* Returns whether this view can receive pointer events.
		*
		* @return {@code true} if this view can receive pointer events.
		* @hide
		*/
		protected boolean canReceivePointerEvents() {
		return (mViewFlags & VISIBILITY_MASK) == VISIBLE \|\| getAnimation() != null;
		}

		/**
		* Filter the touch event to apply security policies.
		*

core/java/android/view/ViewGroup.java

+45 −14

Original line number	Diff line number	Diff line
		@@ -2011,7 +2011,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		for (int i = childrenCount - 1; i >= 0; i--) {
		final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
		final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
		if (!canViewReceivePointerEvents(child)
		if (!child.canReceivePointerEvents()
		\|\| !isTransformedTouchPointInView(x, y, child, null)) {
		continue;
		}
		@@ -2094,7 +2094,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		childrenCount, i, customOrder);
		final View child = getAndVerifyPreorderedView(
		preorderedList, children, childIndex);
		if (!canViewReceivePointerEvents(child)
		if (!child.canReceivePointerEvents()
		\|\| !isTransformedTouchPointInView(x, y, child, null)) {
		continue;
		}
		@@ -2314,7 +2314,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
		final View child =
		getAndVerifyPreorderedView(preorderedList, children, childIndex);
		if (!canViewReceivePointerEvents(child)
		if (!child.canReceivePointerEvents()
		\|\| !isTransformedTouchPointInView(x, y, child, null)) {
		continue;
		}
		@@ -2500,7 +2500,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		for (int i = childrenCount - 1; i >= 0; i--) {
		final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
		final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
		if (!canViewReceivePointerEvents(child)
		if (!child.canReceivePointerEvents()
		\|\| !isTransformedTouchPointInView(x, y, child, null)) {
		continue;
		}
		@@ -2680,7 +2680,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		i = childrenCount - 1;
		}

		if (!canViewReceivePointerEvents(child)
		if (!child.canReceivePointerEvents()
		\|\| !isTransformedTouchPointInView(x, y, child, null)) {
		ev.setTargetAccessibilityFocus(false);
		continue;
		@@ -2970,15 +2970,6 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		}
		}

		/**
		* Returns true if a child view can receive pointer events.
		* @hide
		*/
		private static boolean canViewReceivePointerEvents(@NonNull View child) {
		return (child.mViewFlags & VISIBILITY_MASK) == VISIBLE
		\|\| child.getAnimation() != null;
		}

		private float[] getTempPoint() {
		if (mTempPoint == null) {
		mTempPoint = new float[2];
		@@ -7199,6 +7190,46 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
		}
		}

		/**
		* @hide
		*/
		@Override
		public void subtractObscuredTouchableRegion(Region touchableRegion, View view) {
		final int childrenCount = mChildrenCount;
		final ArrayList<View> preorderedList = buildTouchDispatchChildList();
		final boolean customOrder = preorderedList == null && isChildrenDrawingOrderEnabled();
		final View[] children = mChildren;
		for (int i = childrenCount - 1; i >= 0; i--) {
		final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
		final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
		if (child == view) {
		// We've reached the target view.
		break;
		}
		if (!child.canReceivePointerEvents()) {
		// This child cannot be touched. Skip it.
		continue;
		}
		applyOpToRegionByBounds(touchableRegion, child, Region.Op.DIFFERENCE);
		}

		// The touchable region should not exceed the bounds of its container.
		applyOpToRegionByBounds(touchableRegion, this, Region.Op.INTERSECT);

		final ViewParent parent = getParent();
		if (parent != null) {
		parent.subtractObscuredTouchableRegion(touchableRegion, this);
		}
		}

		private static void applyOpToRegionByBounds(Region region, View view, Region.Op op) {
		final int[] locationInWindow = new int[2];
		view.getLocationInWindow(locationInWindow);
		final int x = locationInWindow[0];
		final int y = locationInWindow[1];
		region.op(x, y, x + view.getWidth(), y + view.getHeight(), op);
		}

		@Override
		public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) {
		insets = super.dispatchApplyWindowInsets(insets);

core/java/android/view/ViewParent.java

+14 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@ package android.view;

		import android.annotation.NonNull;
		import android.graphics.Rect;
		import android.graphics.Region;
		import android.os.Bundle;
		import android.view.accessibility.AccessibilityEvent;

		@@ -660,4 +661,17 @@ public interface ViewParent {
		* @return true if the action was consumed by this ViewParent
		*/
		public boolean onNestedPrePerformAccessibilityAction(View target, int action, Bundle arguments);

		/**
		* Given a touchable region of a child, this method reduces region by the bounds of all views on
		* top of the child for which {@link View#canReceivePointerEvents} returns {@code true}. This
		* applies recursively for all views in the view hierarchy on top of this one.
		*
		* @param touchableRegion The touchable region we want to modify.
		* @param view A child view of this ViewGroup which indicates the z-order of the touchable
		* region.
		* @hide
		*/
		default void subtractObscuredTouchableRegion(Region touchableRegion, View view) {
		}
		}