1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.view; 18 19 import android.annotation.NonNull; 20 import android.annotation.Nullable; 21 import android.graphics.Matrix; 22 import android.os.IBinder; 23 import android.view.accessibility.AccessibilityManager; 24 import android.view.accessibility.IAccessibilityEmbeddedConnection; 25 26 import java.lang.ref.WeakReference; 27 28 /** 29 * This class is an interface this ViewRootImpl provides to the host view to the latter 30 * can interact with the view hierarchy in SurfaceControlViewHost. 31 * 32 * @hide 33 */ 34 final class AccessibilityEmbeddedConnection extends IAccessibilityEmbeddedConnection.Stub { 35 private final WeakReference<ViewRootImpl> mViewRootImpl; 36 private final Matrix mTmpScreenMatrix = new Matrix(); 37 AccessibilityEmbeddedConnection(ViewRootImpl viewRootImpl)38 AccessibilityEmbeddedConnection(ViewRootImpl viewRootImpl) { 39 mViewRootImpl = new WeakReference<>(viewRootImpl); 40 } 41 42 @Override associateEmbeddedHierarchy(@onNull IBinder host, int hostViewId)43 public @Nullable IBinder associateEmbeddedHierarchy(@NonNull IBinder host, int hostViewId) { 44 final ViewRootImpl viewRootImpl = mViewRootImpl.get(); 45 if (viewRootImpl != null) { 46 final AccessibilityManager accessibilityManager = AccessibilityManager.getInstance( 47 viewRootImpl.mContext); 48 viewRootImpl.mAttachInfo.mLeashedParentToken = host; 49 viewRootImpl.mAttachInfo.mLeashedParentAccessibilityViewId = hostViewId; 50 if (accessibilityManager.isEnabled()) { 51 accessibilityManager.associateEmbeddedHierarchy(host, viewRootImpl.mLeashToken); 52 } 53 return viewRootImpl.mLeashToken; 54 } 55 return null; 56 } 57 58 @Override disassociateEmbeddedHierarchy()59 public void disassociateEmbeddedHierarchy() { 60 final ViewRootImpl viewRootImpl = mViewRootImpl.get(); 61 if (viewRootImpl != null) { 62 final AccessibilityManager accessibilityManager = AccessibilityManager.getInstance( 63 viewRootImpl.mContext); 64 viewRootImpl.mAttachInfo.mLeashedParentToken = null; 65 viewRootImpl.mAttachInfo.mLeashedParentAccessibilityViewId = View.NO_ID; 66 viewRootImpl.mAttachInfo.mLocationInParentDisplay.set(0, 0); 67 if (accessibilityManager.isEnabled()) { 68 accessibilityManager.disassociateEmbeddedHierarchy(viewRootImpl.mLeashToken); 69 } 70 } 71 } 72 73 @Override setScreenMatrix(float[] matrixValues)74 public void setScreenMatrix(float[] matrixValues) { 75 final ViewRootImpl viewRootImpl = mViewRootImpl.get(); 76 if (viewRootImpl != null) { 77 mTmpScreenMatrix.setValues(matrixValues); 78 if (viewRootImpl.mAttachInfo.mScreenMatrixInEmbeddedHierarchy == null) { 79 viewRootImpl.mAttachInfo.mScreenMatrixInEmbeddedHierarchy = new Matrix(); 80 } 81 viewRootImpl.mAttachInfo.mScreenMatrixInEmbeddedHierarchy.set(mTmpScreenMatrix); 82 } 83 } 84 } 85