Make Activites touch opaque - DO NOT MERGE am: 22261fa664 (eaf6143e) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/wm/ActivityRecord.java

+13 −0

Original line number	Diff line number	Diff line
		@@ -775,6 +775,13 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A

		private AppSaturationInfo mLastAppSaturationInfo;

		private final ActivityRecordInputSink mActivityRecordInputSink;

		// Activities with this uid are allowed to not create an input sink while being in the same
		// task and directly above this ActivityRecord. This field is updated whenever a new activity
		// is launched from this ActivityRecord. Touches are always allowed within the same uid.
		int mAllowedTouchUid;

		private final ColorDisplayService.ColorTransformController mColorTransformController =
		(matrix, translation) -> mWmService.mH.post(() -> {
		synchronized (mWmService.mGlobalLock) {
		@@ -1722,6 +1729,8 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
		createTime = _createTime;
		}
		mAtmService.mPackageConfigPersister.updateConfigIfNeeded(this, mUserId, packageName);

		mActivityRecordInputSink = new ActivityRecordInputSink(this, sourceRecord);
		}

		/**
		@@ -3558,6 +3567,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
		destroyImmediately("removeImmediately");
		}
		onRemovedFromDisplay();
		mActivityRecordInputSink.releaseSurfaceControl();
		super.removeImmediately();
		}

		@@ -6692,6 +6702,9 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
		} else if (!show && mLastSurfaceShowing) {
		getSyncTransaction().hide(mSurfaceControl);
		}
		if (show) {
		mActivityRecordInputSink.applyChangesToSurfaceIfChanged(getSyncTransaction());
		}
		}
		if (mThumbnail != null) {
		mThumbnail.setShowing(getPendingTransaction(), show);

services/core/java/com/android/server/wm/ActivityRecordInputSink.java

0 → 100644

+113 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2022 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.server.wm;

		import android.os.Process;
		import android.view.InputWindowHandle;
		import android.view.SurfaceControl;
		import android.view.WindowManager;

		/**
		* Creates a InputWindowHandle that catches all touches that would otherwise pass through an
		* Activity.
		*/
		class ActivityRecordInputSink {

		private final ActivityRecord mActivityRecord;
		private final String mName;

		private InputWindowHandle mInputWindowHandle;
		private SurfaceControl mSurfaceControl;

		ActivityRecordInputSink(ActivityRecord activityRecord, ActivityRecord sourceRecord) {
		mActivityRecord = activityRecord;
		mName = Integer.toHexString(System.identityHashCode(this)) + " ActivityRecordInputSink "
		+ mActivityRecord.mActivityComponent.flattenToShortString();
		if (sourceRecord != null) {
		sourceRecord.mAllowedTouchUid = mActivityRecord.getUid();
		}
		}

		public void applyChangesToSurfaceIfChanged(SurfaceControl.Transaction transaction) {
		boolean windowHandleChanged = updateInputWindowHandle();
		if (mSurfaceControl == null) {
		mSurfaceControl = createSurface(transaction);
		}
		if (windowHandleChanged) {
		transaction.setInputWindowInfo(mSurfaceControl, mInputWindowHandle);
		}
		}

		private SurfaceControl createSurface(SurfaceControl.Transaction t) {
		SurfaceControl surfaceControl = mActivityRecord.makeChildSurface(null)
		.setName(mName)
		.setHidden(false)
		.setCallsite("ActivityRecordInputSink.createSurface")
		.build();
		// Put layer below all siblings (and the parent surface too)
		t.setLayer(surfaceControl, Integer.MIN_VALUE);
		return surfaceControl;
		}

		private boolean updateInputWindowHandle() {
		boolean changed = false;
		if (mInputWindowHandle == null) {
		mInputWindowHandle = createInputWindowHandle();
		changed = true;
		}
		// Don't block touches from passing through to an activity below us in the same task, if
		// that activity is either from the same uid or if that activity has launched an activity
		// in our uid.
		final ActivityRecord activityBelowInTask =
		mActivityRecord.getTask().getActivityBelow(mActivityRecord);
		final boolean allowPassthrough = activityBelowInTask != null && (
		activityBelowInTask.mAllowedTouchUid == mActivityRecord.getUid()
		\|\| activityBelowInTask.isUid(mActivityRecord.getUid()));
		boolean notTouchable = (mInputWindowHandle.layoutParamsFlags
		& WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE) != 0;
		if (allowPassthrough \|\| mActivityRecord.isAppTransitioning()) {
		mInputWindowHandle.layoutParamsFlags \|= WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
		changed \|= !notTouchable;
		} else {
		mInputWindowHandle.layoutParamsFlags &= ~WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
		changed \|= notTouchable;
		}
		return changed;
		}

		private InputWindowHandle createInputWindowHandle() {
		InputWindowHandle inputWindowHandle = new InputWindowHandle(null,
		mActivityRecord.getDisplayId());
		inputWindowHandle.replaceTouchableRegionWithCrop = true;
		inputWindowHandle.name = mName;
		inputWindowHandle.layoutParamsType = WindowManager.LayoutParams.TYPE_INPUT_CONSUMER;
		inputWindowHandle.ownerUid = Process.myUid();
		inputWindowHandle.ownerPid = Process.myPid();
		inputWindowHandle.layoutParamsFlags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
		inputWindowHandle.inputFeatures =
		WindowManager.LayoutParams.INPUT_FEATURE_NO_INPUT_CHANNEL;
		return inputWindowHandle;
		}

		void releaseSurfaceControl() {
		if (mSurfaceControl != null) {
		mSurfaceControl.release();
		mSurfaceControl = null;
		}
		}

		}