| /* |
| * Copyright (C) 2020 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.graphics.Matrix; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.RemoteException; |
| import android.util.Log; |
| import android.view.accessibility.IAccessibilityEmbeddedConnection; |
| |
| import java.lang.ref.WeakReference; |
| |
| class RemoteAccessibilityController { |
| private static final String TAG = "RemoteAccessibilityController"; |
| private int mHostId; |
| private RemoteAccessibilityEmbeddedConnection mConnectionWrapper; |
| private Matrix mWindowMatrixForEmbeddedHierarchy = new Matrix(); |
| private final float[] mMatrixValues = new float[9]; |
| private View mHostView; |
| |
| RemoteAccessibilityController(View v) { |
| mHostView = v; |
| } |
| |
| private void runOnUiThread(Runnable runnable) { |
| final Handler h = mHostView.getHandler(); |
| if (h != null && h.getLooper() != Looper.myLooper()) { |
| h.post(runnable); |
| } else { |
| runnable.run(); |
| } |
| } |
| |
| void assosciateHierarchy(IAccessibilityEmbeddedConnection connection, |
| IBinder leashToken, int hostId) { |
| mHostId = hostId; |
| |
| try { |
| leashToken = connection.associateEmbeddedHierarchy( |
| leashToken, mHostId); |
| setRemoteAccessibilityEmbeddedConnection(connection, leashToken); |
| } catch (RemoteException e) { |
| Log.d(TAG, "Error in associateEmbeddedHierarchy " + e); |
| } |
| } |
| |
| void disassosciateHierarchy() { |
| setRemoteAccessibilityEmbeddedConnection(null, null); |
| } |
| |
| boolean alreadyAssociated(IAccessibilityEmbeddedConnection connection) { |
| if (mConnectionWrapper == null) { |
| return false; |
| } |
| return mConnectionWrapper.mConnection.equals(connection); |
| } |
| |
| boolean connected() { |
| return mConnectionWrapper != null; |
| } |
| |
| IBinder getLeashToken() { |
| return mConnectionWrapper.getLeashToken(); |
| } |
| |
| /** |
| * Wrapper of accessibility embedded connection for embedded view hierarchy. |
| */ |
| private static final class RemoteAccessibilityEmbeddedConnection |
| implements IBinder.DeathRecipient { |
| private final WeakReference<RemoteAccessibilityController> mController; |
| private final IAccessibilityEmbeddedConnection mConnection; |
| private final IBinder mLeashToken; |
| |
| RemoteAccessibilityEmbeddedConnection( |
| RemoteAccessibilityController controller, |
| IAccessibilityEmbeddedConnection connection, |
| IBinder leashToken) { |
| mController = new WeakReference<>(controller); |
| mConnection = connection; |
| mLeashToken = leashToken; |
| } |
| |
| IAccessibilityEmbeddedConnection getConnection() { |
| return mConnection; |
| } |
| |
| IBinder getLeashToken() { |
| return mLeashToken; |
| } |
| |
| void linkToDeath() throws RemoteException { |
| mConnection.asBinder().linkToDeath(this, 0); |
| } |
| |
| void unlinkToDeath() { |
| mConnection.asBinder().unlinkToDeath(this, 0); |
| } |
| |
| @Override |
| public void binderDied() { |
| unlinkToDeath(); |
| RemoteAccessibilityController controller = mController.get(); |
| if (controller == null) { |
| return; |
| } |
| controller.runOnUiThread(() -> { |
| if (controller.mConnectionWrapper == this) { |
| controller.mConnectionWrapper = null; |
| } |
| }); |
| } |
| } |
| |
| private void setRemoteAccessibilityEmbeddedConnection( |
| IAccessibilityEmbeddedConnection connection, IBinder leashToken) { |
| try { |
| if (mConnectionWrapper != null) { |
| mConnectionWrapper.getConnection() |
| .disassociateEmbeddedHierarchy(); |
| mConnectionWrapper.unlinkToDeath(); |
| mConnectionWrapper = null; |
| } |
| if (connection != null && leashToken != null) { |
| mConnectionWrapper = |
| new RemoteAccessibilityEmbeddedConnection(this, connection, leashToken); |
| mConnectionWrapper.linkToDeath(); |
| } |
| } catch (RemoteException e) { |
| Log.d(TAG, "Error while setRemoteEmbeddedConnection " + e); |
| } |
| } |
| |
| private RemoteAccessibilityEmbeddedConnection getRemoteAccessibilityEmbeddedConnection() { |
| return mConnectionWrapper; |
| } |
| |
| void setWindowMatrix(Matrix m, boolean force) { |
| // If the window matrix doesn't change, do nothing. |
| if (!force && m.equals(mWindowMatrixForEmbeddedHierarchy)) { |
| return; |
| } |
| |
| try { |
| final RemoteAccessibilityEmbeddedConnection wrapper = |
| getRemoteAccessibilityEmbeddedConnection(); |
| if (wrapper == null) { |
| return; |
| } |
| m.getValues(mMatrixValues); |
| wrapper.getConnection().setWindowMatrix(mMatrixValues); |
| mWindowMatrixForEmbeddedHierarchy.set(m); |
| } catch (RemoteException e) { |
| Log.d(TAG, "Error while setScreenMatrix " + e); |
| } |
| } |
| |
| |
| |
| |
| |
| |
| } |