Support accessibility on embedded hierarchies (2/n) (a459b199) · Commits · e / os / android_frameworks_base

core/java/android/view/AccessibilityEmbeddedConnection.java

0 → 100644

+81 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2019 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 android.view;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.graphics.Matrix;
		import android.os.IBinder;
		import android.view.accessibility.AccessibilityManager;
		import android.view.accessibility.IAccessibilityEmbeddedConnection;

		import java.lang.ref.WeakReference;

		/**
		* This class is an interface this ViewRootImpl provides to the host view to the latter
		* can interact with the view hierarchy in SurfaceControlViewHost.
		*
		* @hide
		*/
		final class AccessibilityEmbeddedConnection extends IAccessibilityEmbeddedConnection.Stub {
		private final WeakReference<ViewRootImpl> mViewRootImpl;

		AccessibilityEmbeddedConnection(ViewRootImpl viewRootImpl) {
		mViewRootImpl = new WeakReference<>(viewRootImpl);
		}

		@Override
		public @Nullable IBinder associateEmbeddedHierarchy(@NonNull IBinder host, int hostViewId) {
		final ViewRootImpl viewRootImpl = mViewRootImpl.get();
		if (viewRootImpl != null) {
		final AccessibilityManager accessibilityManager = AccessibilityManager.getInstance(
		viewRootImpl.mContext);
		viewRootImpl.mAttachInfo.mLeashedParentToken = host;
		viewRootImpl.mAttachInfo.mLeashedParentAccessibilityViewId = hostViewId;
		if (accessibilityManager.isEnabled()) {
		accessibilityManager.associateEmbeddedHierarchy(host, viewRootImpl.mLeashToken);
		}
		return viewRootImpl.mLeashToken;
		}
		return null;
		}

		@Override
		public void disassociateEmbeddedHierarchy() {
		final ViewRootImpl viewRootImpl = mViewRootImpl.get();
		if (viewRootImpl != null) {
		final AccessibilityManager accessibilityManager = AccessibilityManager.getInstance(
		viewRootImpl.mContext);
		viewRootImpl.mAttachInfo.mLeashedParentToken = null;
		viewRootImpl.mAttachInfo.mLeashedParentAccessibilityViewId = View.NO_ID;
		viewRootImpl.mAttachInfo.mLocationInParentDisplay.set(0, 0);
		if (accessibilityManager.isEnabled()) {
		accessibilityManager.disassociateEmbeddedHierarchy(viewRootImpl.mLeashToken);
		}
		}
		}

		@Override
		public void setScreenMatrix(float[] matrixValues) {
		final ViewRootImpl viewRootImpl = mViewRootImpl.get();
		if (viewRootImpl != null) {
		// TODO(b/148821260): Implement the rest of matrix values.
		viewRootImpl.mAttachInfo.mLocationInParentDisplay.set(
		(int) matrixValues[Matrix.MTRANS_X], (int) matrixValues[Matrix.MTRANS_Y]);
		}
		}
		}

core/java/android/view/AccessibilityInteractionController.java

+32 −0

Original line number	Diff line number	Diff line
		@@ -855,6 +855,36 @@ public final class AccessibilityInteractionController {
		return mViewRootImpl.mAttachInfo.mLocationInParentDisplay.equals(0, 0);
		}

		private void associateLeashedParentIfNeeded(List<AccessibilityNodeInfo> infos) {
		if (infos == null \|\| shouldBypassAssociateLeashedParent()) {
		return;
		}
		final int infoCount = infos.size();
		for (int i = 0; i < infoCount; i++) {
		final AccessibilityNodeInfo info = infos.get(i);
		associateLeashedParentIfNeeded(info);
		}
		}

		private void associateLeashedParentIfNeeded(AccessibilityNodeInfo info) {
		if (info == null \|\| shouldBypassAssociateLeashedParent()) {
		return;
		}
		// The node id of root node in embedded maybe not be ROOT_NODE_ID so we compare the id
		// with root view.
		if (mViewRootImpl.mView.getAccessibilityViewId()
		!= AccessibilityNodeInfo.getAccessibilityViewId(info.getSourceNodeId())) {
		return;
		}
		info.setLeashedParent(mViewRootImpl.mAttachInfo.mLeashedParentToken,
		mViewRootImpl.mAttachInfo.mLeashedParentAccessibilityViewId);
		}

		private boolean shouldBypassAssociateLeashedParent() {
		return (mViewRootImpl.mAttachInfo.mLeashedParentToken == null
		&& mViewRootImpl.mAttachInfo.mLeashedParentAccessibilityViewId == View.NO_ID);
		}

		private void applyAppScaleAndMagnificationSpecIfNeeded(AccessibilityNodeInfo info,
		MagnificationSpec spec) {
		if (info == null) {
		@@ -914,6 +944,7 @@ public final class AccessibilityInteractionController {
		MagnificationSpec spec, Region interactiveRegion) {
		try {
		mViewRootImpl.mAttachInfo.mAccessibilityFetchFlags = 0;
		associateLeashedParentIfNeeded(infos);
		adjustBoundsInScreenIfNeeded(infos);
		// To avoid applyAppScaleAndMagnificationSpecIfNeeded changing the bounds of node,
		// then impact the visibility result, we need to adjust visibility before apply scale.
		@@ -935,6 +966,7 @@ public final class AccessibilityInteractionController {
		MagnificationSpec spec, Region interactiveRegion) {
		try {
		mViewRootImpl.mAttachInfo.mAccessibilityFetchFlags = 0;
		associateLeashedParentIfNeeded(info);
		adjustBoundsInScreenIfNeeded(info);
		// To avoid applyAppScaleAndMagnificationSpecIfNeeded changing the bounds of node,
		// then impact the visibility result, we need to adjust visibility before apply scale.

core/java/android/view/View.java

+12 −0

Original line number	Diff line number	Diff line
		@@ -28988,6 +28988,18 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
		*/
		OnContentApplyWindowInsetsListener mContentOnApplyWindowInsetsListener;

		/**
		* The leash token of this view's parent when it's in an embedded hierarchy that is
		* re-parented to another window.
		*/
		IBinder mLeashedParentToken;

		/**
		* The accessibility view id of this view's parent when it's in an embedded
		* hierarchy that is re-parented to another window.
		*/
		int mLeashedParentAccessibilityViewId;

		/**
		* Creates a new set of attachment information with the specified
		* events handler and thread.

core/java/android/view/ViewRootImpl.java

+22 −0

Original line number	Diff line number	Diff line
		@@ -135,6 +135,7 @@ import android.view.accessibility.AccessibilityNodeInfo;
		import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction;
		import android.view.accessibility.AccessibilityNodeProvider;
		import android.view.accessibility.AccessibilityWindowInfo;
		import android.view.accessibility.IAccessibilityEmbeddedConnection;
		import android.view.accessibility.IAccessibilityInteractionConnection;
		import android.view.accessibility.IAccessibilityInteractionConnectionCallback;
		import android.view.animation.AccelerateDecelerateInterpolator;
		@@ -355,6 +356,8 @@ public final class ViewRootImpl implements ViewParent,

		final W mWindow;

		final IBinder mLeashToken;

		final int mTargetSdkVersion;

		int mSeq;
		@@ -652,6 +655,8 @@ public final class ViewRootImpl implements ViewParent,

		private final GestureExclusionTracker mGestureExclusionTracker = new GestureExclusionTracker();

		private IAccessibilityEmbeddedConnection mEmbeddedConnection;

		static final class SystemUiVisibilityInfo {
		int seq;
		int globalVisibility;
		@@ -685,6 +690,7 @@ public final class ViewRootImpl implements ViewParent,
		mVisRect = new Rect();
		mWinFrame = new Rect();
		mWindow = new W(this);
		mLeashToken = new Binder();
		mTargetSdkVersion = context.getApplicationInfo().targetSdkVersion;
		mViewVisibility = View.GONE;
		mTransparentRegion = new Region();
		@@ -9157,6 +9163,10 @@ public final class ViewRootImpl implements ViewParent,
		focusedView.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED);
		}
		}
		if (mAttachInfo.mLeashedParentToken != null) {
		mAccessibilityManager.associateEmbeddedHierarchy(
		mAttachInfo.mLeashedParentToken, mLeashToken);
		}
		} else {
		ensureNoConnection();
		mHandler.obtainMessage(MSG_CLEAR_ACCESSIBILITY_FOCUS_HOST).sendToTarget();
		@@ -9169,6 +9179,7 @@ public final class ViewRootImpl implements ViewParent,
		if (!registered) {
		mAttachInfo.mAccessibilityWindowId =
		mAccessibilityManager.addAccessibilityInteractionConnection(mWindow,
		mLeashToken,
		mContext.getPackageName(),
		new AccessibilityInteractionConnection(ViewRootImpl.this));
		}
		@@ -9355,6 +9366,17 @@ public final class ViewRootImpl implements ViewParent,
		}
		}

		/**
		* Gets an accessibility embedded connection interface for this ViewRootImpl.
		* @hide
		*/
		public IAccessibilityEmbeddedConnection getEmbeddedConnection() {
		if (mEmbeddedConnection == null) {
		mEmbeddedConnection = new AccessibilityEmbeddedConnection(ViewRootImpl.this);
		}
		return mEmbeddedConnection;
		}

		private class SendWindowContentChangedAccessibilityEvent implements Runnable {
		private int mChangeTypes = 0;

core/java/android/view/accessibility/AccessibilityManager.java

+48 −3

Original line number	Diff line number	Diff line
		@@ -1085,6 +1085,50 @@ public final class AccessibilityManager {
		}
		}

		/**
		* Associate the connection between the host View and the embedded SurfaceControlViewHost.
		*
		* @hide
		*/
		public void associateEmbeddedHierarchy(@NonNull IBinder host, @NonNull IBinder embedded) {
		final IAccessibilityManager service;
		synchronized (mLock) {
		service = getServiceLocked();
		if (service == null) {
		return;
		}
		}
		try {
		service.associateEmbeddedHierarchy(host, embedded);
		} catch (RemoteException e) {
		return;
		}
		}

		/**
		* Disassociate the connection between the host View and the embedded SurfaceControlViewHost.
		* The given token could be either from host side or embedded side.
		*
		* @hide
		*/
		public void disassociateEmbeddedHierarchy(@NonNull IBinder token) {
		if (token == null) {
		return;
		}
		final IAccessibilityManager service;
		synchronized (mLock) {
		service = getServiceLocked();
		if (service == null) {
		return;
		}
		}
		try {
		service.disassociateEmbeddedHierarchy(token);
		} catch (RemoteException e) {
		return;
		}
		}

		/**
		* Sets the current state and notifies listeners, if necessary.
		*
		@@ -1147,11 +1191,12 @@ public final class AccessibilityManager {
		/**
		* Adds an accessibility interaction connection interface for a given window.
		* @param windowToken The window token to which a connection is added.
		* @param leashToken The leash token to which a connection is added.
		* @param connection The connection.
		*
		* @hide
		*/
		public int addAccessibilityInteractionConnection(IWindow windowToken,
		public int addAccessibilityInteractionConnection(IWindow windowToken, IBinder leashToken,
		String packageName, IAccessibilityInteractionConnection connection) {
		final IAccessibilityManager service;
		final int userId;
		@@ -1163,8 +1208,8 @@ public final class AccessibilityManager {
		userId = mUserId;
		}
		try {
		return service.addAccessibilityInteractionConnection(windowToken, connection,
		packageName, userId);
		return service.addAccessibilityInteractionConnection(windowToken, leashToken,
		connection, packageName, userId);
		} catch (RemoteException re) {
		Log.e(LOG_TAG, "Error while adding an accessibility interaction connection. ", re);
		}