ExploreByTouchHelper.java revision cc35612e283564c245408da4bb9264f38a02487a
16eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette/* 26eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Copyright (C) 2013 The Android Open Source Project 36eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 46eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Licensed under the Apache License, Version 2.0 (the "License"); 56eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * you may not use this file except in compliance with the License. 66eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * You may obtain a copy of the License at 76eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 86eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * http://www.apache.org/licenses/LICENSE-2.0 96eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Unless required by applicable law or agreed to in writing, software 116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * distributed under the License is distributed on an "AS IS" BASIS, 126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * See the License for the specific language governing permissions and 146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * limitations under the License. 156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverettepackage android.support.v4.widget; 186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.content.Context; 206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.graphics.Rect; 216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.os.Bundle; 22049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.support.annotation.NonNull; 23049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.support.annotation.Nullable; 24e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viveretteimport android.support.v4.util.SparseArrayCompat; 256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.AccessibilityDelegateCompat; 26049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.support.v4.view.KeyEventCompat; 276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.MotionEventCompat; 286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.ViewCompat; 297f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viveretteimport android.support.v4.view.ViewCompat.FocusDirection; 307f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viveretteimport android.support.v4.view.ViewCompat.FocusRealDirection; 316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.ViewParentCompat; 326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityEventCompat; 336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityManagerCompat; 346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityNodeInfoCompat; 356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityNodeProviderCompat; 366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityRecordCompat; 37049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.view.KeyEvent; 386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.MotionEvent; 396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.View; 406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.ViewParent; 416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.accessibility.AccessibilityEvent; 426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.accessibility.AccessibilityManager; 436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 44049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport java.util.ArrayList; 456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport java.util.List; 466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette/** 486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * ExploreByTouchHelper is a utility class for implementing accessibility 496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * support in custom {@link View}s that represent a collection of View-like 506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * logical items. It extends {@link AccessibilityNodeProviderCompat} and 516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * simplifies many aspects of providing information to accessibility services 526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and managing accessibility focus. This class does not currently support 536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * hierarchies of logical items. 546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 5512d8b3f36c7b503221185b44791822e59e690966Alan Viverette * Clients should override abstract methods on this class and attach it to the 5612d8b3f36c7b503221185b44791822e59e690966Alan Viverette * host view using {@link ViewCompat#setAccessibilityDelegate}: 57049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre> 59049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * class MyCustomView extends View { 60049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * private MyVirtualViewHelper mVirtualViewHelper; 61049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 62049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public MyCustomView(Context context, ...) { 63049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * ... 64049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * mVirtualViewHelper = new MyVirtualViewHelper(this); 65049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * ViewCompat.setAccessibilityDelegate(this, mVirtualViewHelper); 66049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 67049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 68049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @Override 69049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean dispatchHoverEvent(MotionEvent event) { 70049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchHoverEvent(this, event) 71049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchHoverEvent(event); 72049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 73049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 74049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @Override 75049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean dispatchKeyEvent(KeyEvent event) { 76049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchKeyEvent(event) 77049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchKeyEvent(event); 78049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 79049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 80049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @Override 81049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean onFocusChanged(boolean gainFocus, int direction, 82049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Rect previouslyFocusedRect) { 83049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 84049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * mHelper.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 85049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 86049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 8712d8b3f36c7b503221185b44791822e59e690966Alan Viverette * mAccessHelper = new MyExploreByTouchHelper(someView); 886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * ViewCompat.setAccessibilityDelegate(someView, mAccessHelper); 896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverettepublic abstract class ExploreByTouchHelper extends AccessibilityDelegateCompat { 926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** Virtual node identifier value for invalid nodes. */ 936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public static final int INVALID_ID = Integer.MIN_VALUE; 946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9512d8b3f36c7b503221185b44791822e59e690966Alan Viverette /** Virtual node identifier value for the host view's node. */ 9612d8b3f36c7b503221185b44791822e59e690966Alan Viverette public static final int HOST_ID = View.NO_ID; 9712d8b3f36c7b503221185b44791822e59e690966Alan Viverette 986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** Default class name used for virtual views. */ 99049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static final String DEFAULT_CLASS_NAME = "android.view.View"; 1006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 101cc35612e283564c245408da4bb9264f38a02487aAlan Viverette /** Default bounds used to determine if the client didn't set any. */ 102cc35612e283564c245408da4bb9264f38a02487aAlan Viverette private static final Rect INVALID_PARENT_BOUNDS = new Rect( 103cc35612e283564c245408da4bb9264f38a02487aAlan Viverette Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MIN_VALUE, Integer.MIN_VALUE); 104cc35612e283564c245408da4bb9264f38a02487aAlan Viverette 1056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Temporary, reusable data structures. 1066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final Rect mTempScreenRect = new Rect(); 1076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final Rect mTempParentRect = new Rect(); 1086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final Rect mTempVisibleRect = new Rect(); 1096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final int[] mTempGlobalRect = new int[2]; 1106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 111049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Cache of accessibility nodes. This is populated on-demand. */ 112e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette private final SparseArrayCompat<AccessibilityNodeInfoCompat> mCachedNodes = 113e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette new SparseArrayCompat<>(); 114049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** System accessibility manager, used to check state and send events. */ 1166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final AccessibilityManager mManager; 1176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** View whose internal structure is exposed through this helper. */ 119049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private final View mHost; 1206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 121049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Virtual node provider used to expose logical structure to services. */ 122049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private MyNodeProvider mNodeProvider; 1236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 124049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that holds accessibility focus. */ 125049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private int mAccessibilityFocusedVirtualViewId = INVALID_ID; 1266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 127049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that holds keyboard focus. */ 128049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private int mKeyboardFocusedVirtualViewId = INVALID_ID; 129049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 130049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that is currently hovered. */ 1316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private int mHoveredVirtualViewId = INVALID_ID; 1326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 134049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Constructs a new helper that can expose a virtual view hierarchy for the 135049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * specified host view. 1366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 137049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param host view whose virtual view hierarchy is exposed by this helper 1386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 139049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public ExploreByTouchHelper(View host) { 140049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (host == null) { 1416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new IllegalArgumentException("View may not be null"); 1426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 144049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost = host; 145049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 146049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final Context context = host.getContext(); 1476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mManager = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE); 148049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 149049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Host view must be focusable so that we can delegate to virtual 150049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // views. 151049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette host.setFocusable(true); 1527f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette if (ViewCompat.getImportantForAccessibility(host) 1537f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 1547f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette ViewCompat.setImportantForAccessibility( 1557f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette host, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES); 156049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 1606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public AccessibilityNodeProviderCompat getAccessibilityNodeProvider(View host) { 1616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (mNodeProvider == null) { 162049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mNodeProvider = new MyNodeProvider(); 1636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return mNodeProvider; 1656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 168049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates hover events from the host view. 169049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 1706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Dispatches hover {@link MotionEvent}s to the virtual view hierarchy when 1716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * the Explore by Touch feature is enabled. 1726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 173049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 174049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#dispatchHoverEvent(MotionEvent)} method: 1756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre>@Override 1766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * public boolean dispatchHoverEvent(MotionEvent event) { 177049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchHoverEvent(this, event) 178049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchHoverEvent(event); 1796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * } 1806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 1816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 1826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param event The hover event to dispatch to the virtual view hierarchy. 1836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return Whether the hover event was handled. 1846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 185049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean dispatchHoverEvent(@NonNull MotionEvent event) { 1866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (!mManager.isEnabled() 1876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette || !AccessibilityManagerCompat.isTouchExplorationEnabled(mManager)) { 1886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 1896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (event.getAction()) { 1926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_MOVE: 1936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_ENTER: 1946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int virtualViewId = getVirtualViewAt(event.getX(), event.getY()); 1956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette updateHoveredVirtualView(virtualViewId); 1966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return (virtualViewId != INVALID_ID); 1976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_EXIT: 198049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != INVALID_ID) { 1996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette updateHoveredVirtualView(INVALID_ID); 2006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return true; 2016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 2026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 2036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 2046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 2056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 2066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 2076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 2086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 209049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates key events from the host view. 210049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 211049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 212049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#dispatchKeyEvent(KeyEvent)} method: 213049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <pre>@Override 214049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean dispatchKeyEvent(KeyEvent event) { 215049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchKeyEvent(event) 216049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchKeyEvent(event); 217049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 218049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * </pre> 219049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 220049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean dispatchKeyEvent(@NonNull KeyEvent event) { 221049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette boolean handled = false; 222049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 223049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int action = event.getAction(); 224049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (action != KeyEvent.ACTION_UP) { 225049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int keyCode = event.getKeyCode(); 226049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (keyCode) { 227049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_LEFT: 228049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_UP: 229049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_RIGHT: 230049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_DOWN: 231049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 232049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int direction = keyToDirection(keyCode); 233049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int count = 1 + event.getRepeatCount(); 234049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette for (int i = 0; i < count; i++) { 235049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (moveFocus(direction, null)) { 236049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = true; 237049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 238049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 239049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 240049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 241049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 242049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 243049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_CENTER: 244049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_ENTER: 245049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 246049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (event.getRepeatCount() == 0) { 247049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clickKeyboardFocusedVirtualView(); 248049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = true; 249049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 250049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 251049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 252049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_TAB: 253049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 254049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = moveFocus(View.FOCUS_FORWARD, null); 255049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) { 256049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = moveFocus(View.FOCUS_BACKWARD, null); 257049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 258049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 259049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 260049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 261049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 262049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return handled; 263049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 264049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 265049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 266049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates focus changes from the host view. 267049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 268049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 269049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#onFocusChanged(boolean, int, Rect)} method: 270049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <pre>@Override 271049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean onFocusChanged(boolean gainFocus, int direction, 272049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Rect previouslyFocusedRect) { 273049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 274049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * mHelper.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 275049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 276049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * </pre> 277049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 278049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void onFocusChanged(boolean gainFocus, int direction, 279049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Nullable Rect previouslyFocusedRect) { 280049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 281049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearKeyboardFocusForVirtualView(mKeyboardFocusedVirtualViewId); 282049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 283049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 284049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (gainFocus) { 285049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette moveFocus(direction, previouslyFocusedRect); 286049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 287049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 288049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 289049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 290049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has accessibility focus 291049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has accessibility 292049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * focus 293049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 294049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final int getAccessibilityFocusedVirtualViewId() { 295049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mAccessibilityFocusedVirtualViewId; 296049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 297049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 298049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 299049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has keyboard focus 300049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has keyboard focus 301049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 302049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final int getKeyboardFocusedVirtualViewId() { 303049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mKeyboardFocusedVirtualViewId; 304049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 305049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 306049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 307049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Maps key event codes to focus directions. 308049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 309049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param keyCode the key event code 310049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the corresponding focus direction 311049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 312049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @FocusRealDirection 313049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static int keyToDirection(int keyCode) { 314049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (keyCode) { 315049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_LEFT: 316049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_LEFT; 317049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_UP: 318049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_UP; 319049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_RIGHT: 320049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_RIGHT; 321049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 322049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_DOWN; 323049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 324049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 325049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 326049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 327049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains the bounds for the specified virtual view. 328049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 329049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view 330049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param outBounds the rect to populate with virtual view bounds 331049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 332049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private void getBoundsInParent(int virtualViewId, Rect outBounds) { 333049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node = obtainAccessibilityNodeInfo(virtualViewId); 334049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.getBoundsInParent(outBounds); 335049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 336049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 337049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 338049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Adapts AccessibilityNodeInfoCompat for obtaining bounds. 339049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 340049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static final FocusStrategy.BoundsAdapter<AccessibilityNodeInfoCompat> NODE_ADAPTER = 341049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette new FocusStrategy.BoundsAdapter<AccessibilityNodeInfoCompat>() { 342049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 343049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public void obtainBounds(AccessibilityNodeInfoCompat node, Rect outBounds) { 344049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.getBoundsInParent(outBounds); 345049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 346049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette }; 347049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 348049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 349e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette * Adapts SparseArrayCompat for iterating through values. 350049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 351e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette private static final FocusStrategy.CollectionAdapter<SparseArrayCompat< 352e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette AccessibilityNodeInfoCompat>, AccessibilityNodeInfoCompat> SPARSE_VALUES_ADAPTER = 353e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette new FocusStrategy.CollectionAdapter<SparseArrayCompat< 354e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette AccessibilityNodeInfoCompat>, AccessibilityNodeInfoCompat>() { 355049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 356049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public AccessibilityNodeInfoCompat get( 357e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette SparseArrayCompat<AccessibilityNodeInfoCompat> collection, int index) { 358049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return collection.valueAt(index); 359049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 360049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 361049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 362e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette public int size(SparseArrayCompat<AccessibilityNodeInfoCompat> collection) { 363049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return collection.size(); 364049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 365049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette }; 366049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 367049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 368049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to move keyboard focus in the specified direction. 369049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 370049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param direction the direction in which to move keyboard focus 371049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param previouslyFocusedRect the bounds of the previously focused item, 372049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@code null} if not available 373049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if keyboard focus moved to a virtual view managed 374049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * by this helper, or {@code false} otherwise 375049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 376049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private boolean moveFocus(@FocusDirection int direction, @Nullable Rect previouslyFocusedRect) { 377049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int focusedNodeId = mKeyboardFocusedVirtualViewId; 378049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat focusedNode = 379049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette focusedNodeId == INVALID_ID ? null : mCachedNodes.get(focusedNodeId); 380049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 381049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat nextFocusedNode; 382049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (direction) { 383049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_FORWARD: 384049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_BACKWARD: 385049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final boolean isLayoutRtl = 386049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.getLayoutDirection(mHost) == ViewCompat.LAYOUT_DIRECTION_RTL; 387049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNode = FocusStrategy.findNextFocusInRelativeDirection(mCachedNodes, 388049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette SPARSE_VALUES_ADAPTER, NODE_ADAPTER, focusedNode, direction, isLayoutRtl, 389049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette false); 390049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 391049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_LEFT: 392049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_UP: 393049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_RIGHT: 394049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_DOWN: 395049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final Rect selectedRect = new Rect(); 396049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 397049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from a virtual view within the host. 398049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette getBoundsInParent(mKeyboardFocusedVirtualViewId, selectedRect); 399049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (previouslyFocusedRect != null) { 400049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from a real view outside the host. 401049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette selectedRect.set(previouslyFocusedRect); 402049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 403049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from... somewhere? Make a guess. 404049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Usually this happens when another view was too lazy 405049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // to pass the previously focused rect (ex. ScrollView 406049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // when moving UP or DOWN). 407049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette guessPreviouslyFocusedRect(mHost, direction, selectedRect); 408049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 409049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNode = FocusStrategy.findNextFocusInAbsoluteDirection(mCachedNodes, 410049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette SPARSE_VALUES_ADAPTER, NODE_ADAPTER, focusedNode, selectedRect, direction); 411049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 412049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 413049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette throw new IllegalArgumentException("direction must be one of " 414049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "{FOCUS_FORWARD, FOCUS_BACKWARD, FOCUS_UP, FOCUS_DOWN, " 415049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "FOCUS_LEFT, FOCUS_RIGHT}."); 416049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 417049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 418049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int nextFocusedNodeId; 419049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (nextFocusedNode == null) { 420049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNodeId = INVALID_ID; 421049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 422049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int index = mCachedNodes.indexOfValue(nextFocusedNode); 423049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNodeId = mCachedNodes.keyAt(index); 424049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 425049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 426049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return requestKeyboardFocusForVirtualView(nextFocusedNodeId); 427049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 428049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 429049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 430049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains a best guess for the previously focused rect for keyboard focus 431049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * moving in the specified direction. 432049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 433049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param host the view into which focus is moving 434049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param direction the absolute direction in which focus is moving 435049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param outBounds the rect to populate with the best-guess bounds for the 436049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * previous focus rect 437049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 438049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static Rect guessPreviouslyFocusedRect(@NonNull View host, 439049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @FocusRealDirection int direction, @NonNull Rect outBounds) { 440049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int w = host.getWidth(); 441049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int h = host.getHeight(); 442049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 443049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (direction) { 444049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_LEFT: 445049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(w, 0, w, h); 446049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 447049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_UP: 448049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(0, h, w, h); 449049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 450049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_RIGHT: 451049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(-1, 0, -1, h); 452049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 453049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_DOWN: 454049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(0, -1, w, -1); 455049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 456049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 457049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette throw new IllegalArgumentException("direction must be one of " 458049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "{FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT}."); 459049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 460049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 461049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return outBounds; 462049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 463049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 464049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 465049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Performs a click action on the keyboard focused virtual view, if any. 466049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 467049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if the click action was performed successfully or 468049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@code false} otherwise 469049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 470049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private boolean clickKeyboardFocusedVirtualView() { 471049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mKeyboardFocusedVirtualViewId != INVALID_ID && onPerformActionForVirtualView( 472049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId, AccessibilityNodeInfoCompat.ACTION_CLICK, null); 473049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 474049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 475049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 4766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an event of the specified type with information about an item 4776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and attempts to send it up through the view hierarchy. 4786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 4796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * You should call this method after performing a user action that normally 4806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * fires an accessibility event, such as clicking on an item. 481049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 4826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre>public void performItemClick(T item) { 4836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * ... 4846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * sendEventForVirtualViewId(item.id, AccessibilityEvent.TYPE_VIEW_CLICKED); 4856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * } 4866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 4876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 488049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view for which to 489049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * send an event 490049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to send 491049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if the event was sent successfully, {@code false} 492049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * otherwise 4936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 494049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean sendEventForVirtualView(int virtualViewId, int eventType) { 4956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((virtualViewId == INVALID_ID) || !mManager.isEnabled()) { 4966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 4976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 4986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 499049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ViewParent parent = mHost.getParent(); 5006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (parent == null) { 5016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 5026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = createEvent(virtualViewId, eventType); 505049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return ViewParentCompat.requestSendAccessibilityEvent(parent, mHost, event); 5066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 5096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Notifies the accessibility framework that the properties of the parent 5106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * view have changed. 5116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 512049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after adding or removing 513049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * items from the parent view. 5146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 515049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateRoot() { 516722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette invalidateVirtualView(HOST_ID, AccessibilityEventCompat.CONTENT_CHANGE_TYPE_SUBTREE); 5176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 5206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Notifies the accessibility framework that the properties of a particular 5216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * item have changed. 5226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 523049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after changing any of the 524049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * properties set in 525049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 5266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 527049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id to invalidate, or 528049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #HOST_ID} to invalidate the root view 529722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * @see #invalidateVirtualView(int, int) 5306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 531049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateVirtualView(int virtualViewId) { 532722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette invalidateVirtualView(virtualViewId, 533722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.CONTENT_CHANGE_TYPE_UNDEFINED); 534722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 535722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette 536722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette /** 537722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * Notifies the accessibility framework that the properties of a particular 538722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * item have changed. 539722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <p> 540049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after changing any of the 541049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * properties set in 542049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 543722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * 544049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id to invalidate, or 545049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #HOST_ID} to invalidate the root view 546049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param changeTypes the bit mask of change types. May be {@code 0} for the 547722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * default (undefined) change type or one or more of: 548722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <ul> 549722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION} 550722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_SUBTREE} 551722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_TEXT} 552722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_UNDEFINED} 553722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * </ul> 554722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette */ 555049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateVirtualView(int virtualViewId, int changeTypes) { 556e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette final SparseArrayCompat<AccessibilityNodeInfoCompat> cachedNodes = mCachedNodes; 557049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (virtualViewId == HOST_ID 558049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette && (changeTypes & AccessibilityEventCompat.CONTENT_CHANGE_TYPE_SUBTREE) != 0) { 5597c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette for (int i = 0, count = cachedNodes.size(); i < count; i++) { 5601fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette cachedNodes.valueAt(i).recycle(); 5617c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette } 5627c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette cachedNodes.clear(); 563049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 5641fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette final int index = cachedNodes.indexOfKey(virtualViewId); 5651fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette if (index >= 0) { 5661fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette cachedNodes.valueAt(index).recycle(); 5671fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette cachedNodes.removeAt(index); 5687c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette } 569049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 570049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 571722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette if (virtualViewId != INVALID_ID && mManager.isEnabled()) { 572049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ViewParent parent = mHost.getParent(); 573722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette if (parent != null) { 574049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Send events up the hierarchy so they can be coalesced. 575722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette final AccessibilityEvent event = createEvent(virtualViewId, 576722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.TYPE_WINDOW_CONTENT_CHANGED); 577722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.setContentChangeTypes(event, changeTypes); 578049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewParentCompat.requestSendAccessibilityEvent(parent, mHost, event); 579722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 580722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 5816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 584049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Returns the virtual view ID for the currently accessibility focused 585049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * item. 586148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette * 587049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has accessibility focus 588049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has accessibility 589049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * focus 590049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @deprecated Use {@link #getAccessibilityFocusedVirtualViewId()}. 591148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette */ 592049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Deprecated 593148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette public int getFocusedVirtualView() { 594049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return getAccessibilityFocusedVirtualViewId(); 595049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 596049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 597049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 598049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Called when the focus state of a virtual view changes. 599049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 600049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view identifier 601049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param hasFocus {@code true} if the view has focus, {@code false} 602049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * otherwise 603049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 604049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette protected void onVirtualViewKeyboardFocusChanged(int virtualViewId, boolean hasFocus) { 605049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Stub method. 606148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette } 607148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette 608148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette /** 6096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Sets the currently hovered item, sending hover accessibility events as 6106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * necessary to maintain the correct state. 6116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 612049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item currently being 613049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * hovered, or {@link #INVALID_ID} if no item is 614049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * hovered within the parent view 6156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private void updateHoveredVirtualView(int virtualViewId) { 6176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (mHoveredVirtualViewId == virtualViewId) { 6186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return; 6196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int previousVirtualViewId = mHoveredVirtualViewId; 6226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mHoveredVirtualViewId = virtualViewId; 6236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Stay consistent with framework behavior by sending ENTER/EXIT pairs 6256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // in reverse order. This is accurate as of API 18. 6266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEventCompat.TYPE_VIEW_HOVER_ENTER); 6276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView( 6286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette previousVirtualViewId, AccessibilityEventCompat.TYPE_VIEW_HOVER_EXIT); 6296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} for the specified 63312d8b3f36c7b503221185b44791822e59e690966Alan Viverette * virtual view id, which includes the host view ({@link #HOST_ID}). 6346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 635049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item for which to 636049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct an event 637049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 638049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 639049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEvent(int virtualViewId, int eventType) { 6426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (virtualViewId) { 64312d8b3f36c7b503221185b44791822e59e690966Alan Viverette case HOST_ID: 6446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return createEventForHost(eventType); 6456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 6466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return createEventForChild(virtualViewId, eventType); 6476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} for the host node. 6526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 653049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 654049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 655049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEventForHost(int eventType) { 6586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 659049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.onInitializeAccessibilityEvent(mHost, event); 6607f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette return event; 6617f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette } 6627f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 6637f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette @Override 6647f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { 6657f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette super.onInitializeAccessibilityEvent(host, event); 666fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette 667fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette // Allow the client to populate the event. 668fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette onPopulateEventForHost(event); 6696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} populated with 6736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * information about the specified item. 6746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 675049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item for which to 676049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct an event 677049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 678049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 679049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEventForChild(int virtualViewId, int eventType) { 6826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 683049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event); 684049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node = obtainAccessibilityNodeInfo(virtualViewId); 685049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 686049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Allow the client to override these properties, 687049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.getText().add(node.getText()); 688049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setContentDescription(node.getContentDescription()); 689049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setScrollable(node.isScrollable()); 690049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setPassword(node.isPassword()); 691049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setEnabled(node.isEnabled()); 692049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setChecked(node.isChecked()); 6936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Allow the client to populate the event. 6956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette onPopulateEventForVirtualView(virtualViewId, event); 6966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Make sure the developer is following the rules. 6986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (event.getText().isEmpty() && (event.getContentDescription() == null)) { 6996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must add text or a content description in " 7006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateEventForVirtualViewId()"); 7016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Don't allow the client to override these properties. 704049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setClassName(node.getClassName()); 705049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setSource(mHost, virtualViewId); 706049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette event.setPackageName(mHost.getContext().getPackageName()); 7076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return event; 7096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 712049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains a populated {@link AccessibilityNodeInfoCompat} for the 713049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * virtual view with the specified identifier. 714049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 715049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method may be called with identifier {@link #HOST_ID} to obtain a 716049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * node for the host view. 7176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 718049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view for which to 719049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct a node 720049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} populated with information 721049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * about the specified item 7226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 723049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @NonNull 724049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private AccessibilityNodeInfoCompat obtainAccessibilityNodeInfo(int virtualViewId) { 725049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node; 726049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int cacheIndex = mCachedNodes.indexOfKey(virtualViewId); 727049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (cacheIndex >= 0) { 728049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node = mCachedNodes.valueAt(cacheIndex); 729049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (virtualViewId == HOST_ID) { 730049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node = createNodeForHost(); 731049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 732049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node = createNodeForChild(virtualViewId); 7336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 734049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 735049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mCachedNodes.put(virtualViewId, node); 736049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 737049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return node; 7386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 7416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the 7426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * host view populated with its virtual descendants. 7436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 744049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} for the parent node 7456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 7461fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette @NonNull 7476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityNodeInfoCompat createNodeForHost() { 7487f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette final AccessibilityNodeInfoCompat info = AccessibilityNodeInfoCompat.obtain(mHost); 7497f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette ViewCompat.onInitializeAccessibilityNodeInfo(mHost, info); 75012d8b3f36c7b503221185b44791822e59e690966Alan Viverette 7516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Add the virtual descendants. 752049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ArrayList<Integer> virtualViewIds = new ArrayList<>(); 7536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette getVisibleVirtualViews(virtualViewIds); 7547f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 7557f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette final int realNodeCount = info.getChildCount(); 756fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette if (realNodeCount > 0 && virtualViewIds.size() > 0) { 757fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette throw new RuntimeException("Views cannot have both real and virtual children"); 758fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette } 7596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 760049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette for (int i = 0, count = virtualViewIds.size(); i < count; i++) { 7617f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette info.addChild(mHost, virtualViewIds.get(i)); 7626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7647f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette return info; 7657f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette } 7667f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 7677f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette @Override 7687f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) { 7697f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette super.onInitializeAccessibilityNodeInfo(host, info); 7707f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 7717f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette // Allow the client to populate the host node. 7727f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette onPopulateNodeForHost(info); 7736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 7766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the 7776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * specified item. Automatically manages accessibility focus actions. 7786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 7796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Allows the implementing class to specify most node properties, but 7806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * overrides the following: 7816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 7826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setPackageName} 7836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setClassName} 7846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setParent(View)} 7856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setSource(View, int)} 7866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser} 7876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)} 7886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 7896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 7906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Uses the bounds of the parent view and the parent-relative bounding 7916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * rectangle specified by 7926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#getBoundsInParent} to automatically 7936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * update the following properties: 7946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 7956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser} 7966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setBoundsInParent} 7976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 7986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 799049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for item for which to construct 800049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * a node 801049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} for the specified item 8026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 8031fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette @NonNull 8046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityNodeInfoCompat createNodeForChild(int virtualViewId) { 8056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityNodeInfoCompat node = AccessibilityNodeInfoCompat.obtain(); 8066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Ensure the client has good defaults. 8086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setEnabled(true); 809049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setFocusable(true); 8106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setClassName(DEFAULT_CLASS_NAME); 811cc35612e283564c245408da4bb9264f38a02487aAlan Viverette node.setBoundsInParent(INVALID_PARENT_BOUNDS); 8126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Allow the client to populate the node. 8146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette onPopulateNodeForVirtualView(virtualViewId, node); 8156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Make sure the developer is following the rules. 8176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((node.getText() == null) && (node.getContentDescription() == null)) { 8186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must add text or a content description in " 8196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.getBoundsInParent(mTempParentRect); 823cc35612e283564c245408da4bb9264f38a02487aAlan Viverette if (mTempParentRect.equals(INVALID_PARENT_BOUNDS)) { 8246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must set parent bounds in " 8256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int actions = node.getActions(); 8296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((actions & AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS) != 0) { 8306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must not add ACTION_ACCESSIBILITY_FOCUS in " 8316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((actions & AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS) != 0) { 8346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must not add ACTION_CLEAR_ACCESSIBILITY_FOCUS in " 8356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Don't allow the client to override these properties. 839049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setPackageName(mHost.getContext().getPackageName()); 840049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setSource(mHost, virtualViewId); 841049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setParent(mHost); 8426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Manage internal accessibility focus state. 844049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId == virtualViewId) { 8456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setAccessibilityFocused(true); 8466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 8476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } else { 8486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setAccessibilityFocused(false); 8496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS); 8506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 852049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Manage internal keyboard focus state. 853049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final boolean isFocused = mKeyboardFocusedVirtualViewId == virtualViewId; 854049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (isFocused) { 855049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_FOCUS); 856049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (node.isFocusable()) { 857049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_FOCUS); 858049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 859049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setFocused(isFocused); 860049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 8616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Set the visibility based on the parent bound. 8626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (intersectVisibleToUser(mTempParentRect)) { 8636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setVisibleToUser(true); 8646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setBoundsInParent(mTempParentRect); 8656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Calculate screen-relative bound. 868049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.getLocationOnScreen(mTempGlobalRect); 8696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int offsetX = mTempGlobalRect[0]; 8706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int offsetY = mTempGlobalRect[1]; 8716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mTempScreenRect.set(mTempParentRect); 8726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mTempScreenRect.offset(offsetX, offsetY); 8736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setBoundsInScreen(mTempScreenRect); 8746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return node; 8766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performAction(int virtualViewId, int action, Bundle arguments) { 8796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (virtualViewId) { 88012d8b3f36c7b503221185b44791822e59e690966Alan Viverette case HOST_ID: 8816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return performActionForHost(action, arguments); 8826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 8836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return performActionForChild(virtualViewId, action, arguments); 8846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performActionForHost(int action, Bundle arguments) { 888049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return ViewCompat.performAccessibilityAction(mHost, action, arguments); 8896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performActionForChild(int virtualViewId, int action, Bundle arguments) { 8926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (action) { 8936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS: 894148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return requestAccessibilityFocus(virtualViewId); 8956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS: 896148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return clearAccessibilityFocus(virtualViewId); 897049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case AccessibilityNodeInfoCompat.ACTION_FOCUS: 898049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return requestKeyboardFocusForVirtualView(virtualViewId); 899049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case AccessibilityNodeInfoCompat.ACTION_CLEAR_FOCUS: 900049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return clearKeyboardFocusForVirtualView(virtualViewId); 9016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 902049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return onPerformActionForVirtualView(virtualViewId, action, arguments); 9036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 9076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Computes whether the specified {@link Rect} intersects with the visible 9086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * portion of its parent {@link View}. Modifies {@code localRect} to contain 9096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * only the visible portion. 9106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 911049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param localRect a rectangle in local (parent) coordinates 912049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether the specified {@link Rect} is visible on the screen 9136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 9146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean intersectVisibleToUser(Rect localRect) { 9156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Missing or empty bounds mean this view is not visible. 9166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((localRect == null) || localRect.isEmpty()) { 9176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Attached to invisible window means this view is not visible. 921049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mHost.getWindowVisibility() != View.VISIBLE) { 9226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // An invisible predecessor means that this view is not visible. 926049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewParent viewParent = mHost.getParent(); 9276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette while (viewParent instanceof View) { 9286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final View view = (View) viewParent; 9296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((ViewCompat.getAlpha(view) <= 0) || (view.getVisibility() != View.VISIBLE)) { 9306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette viewParent = view.getParent(); 9336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // A null parent implies the view is not visible. 9366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (viewParent == null) { 9376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // If no portion of the parent is visible, this view is not visible. 941049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (!mHost.getLocalVisibleRect(mTempVisibleRect)) { 9426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Check if the view intersects the visible portion of the parent. 9466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return localRect.intersect(mTempVisibleRect); 9476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 9506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Attempts to give accessibility focus to a virtual view. 9516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 9526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * A virtual view will not actually take focus if 9536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityManager#isEnabled()} returns false, 9546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityManager#isTouchExplorationEnabled()} returns false, 9556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * or the view already has accessibility focus. 9566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 957049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view on which to 958049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * place accessibility focus 959049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually took accessibility focus 9606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 9616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean requestAccessibilityFocus(int virtualViewId) { 9626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (!mManager.isEnabled() 9636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette || !AccessibilityManagerCompat.isTouchExplorationEnabled(mManager)) { 9646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // TODO: Check virtual view visibility. 967049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != virtualViewId) { 968f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette // Clear focus from the previously focused view, if applicable. 969049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != INVALID_ID) { 970049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearAccessibilityFocus(mAccessibilityFocusedVirtualViewId); 971f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette } 972f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette 973f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette // Set focus on the new view. 974049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mAccessibilityFocusedVirtualViewId = virtualViewId; 975f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette 9766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // TODO: Only invalidate virtual view bounds. 977049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.invalidate(); 9786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, 9796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette AccessibilityEventCompat.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 9806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return true; 9816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 9866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Attempts to clear accessibility focus from a virtual view. 987148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette * 988049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view from which to 989049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * clear accessibility focus 990049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually cleared accessibility focus 9916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 992148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette private boolean clearAccessibilityFocus(int virtualViewId) { 993049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId == virtualViewId) { 994049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mAccessibilityFocusedVirtualViewId = INVALID_ID; 995049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.invalidate(); 9966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, 9976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette AccessibilityEventCompat.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 998148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return true; 9996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1000148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return false; 10016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 10026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 1004049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to give keyboard focus to a virtual view. 1005049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 1006049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view on which to 1007049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * place keyboard focus 1008049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually took keyboard focus 1009049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 1010049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean requestKeyboardFocusForVirtualView(int virtualViewId) { 1011049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (!mHost.isFocused() && !mHost.requestFocus()) { 1012049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Host must have real keyboard focus. 1013049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1014049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1015049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1016049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId == virtualViewId) { 1017049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // The virtual view already has focus. 1018049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1019049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1020049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1021049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 1022049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearKeyboardFocusForVirtualView(mKeyboardFocusedVirtualViewId); 1023049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1024049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1025049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId = virtualViewId; 1026049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1027049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette onVirtualViewKeyboardFocusChanged(virtualViewId, true); 1028049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEvent.TYPE_VIEW_FOCUSED); 1029049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1030049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return true; 1031049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1032049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1033049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 1034049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to clear keyboard focus from a virtual view. 1035049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 1036049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view from which to 1037049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * clear keyboard focus 1038049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually cleared keyboard focus 1039049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 1040049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean clearKeyboardFocusForVirtualView(int virtualViewId) { 1041049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != virtualViewId) { 1042049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // The virtual view is not focused. 1043049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1044049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1045049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1046049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId = INVALID_ID; 1047049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1048049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette onVirtualViewKeyboardFocusChanged(virtualViewId, false); 1049049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEvent.TYPE_VIEW_FOCUSED); 1050049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1051049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return true; 1052049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1053049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1054049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 10556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Provides a mapping between view-relative coordinates and logical 10566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * items. 10576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param x The view-relative x coordinate 10596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param y The view-relative y coordinate 10606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return virtual view identifier for the logical item under 106112d8b3f36c7b503221185b44791822e59e690966Alan Viverette * coordinates (x,y) or {@link #HOST_ID} if there is no item at 1062cd9978cdf0c3852189fb881846db6569d43f5598Alan Viverette * the given coordinates 10636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 10646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract int getVirtualViewAt(float x, float y); 10656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 10676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates a list with the view's visible items. The ordering of items 10686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * within {@code virtualViewIds} specifies order of accessibility focus 10696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * traversal. 10706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewIds The list to populate with visible items 10726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 10736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract void getVisibleVirtualViews(List<Integer> virtualViewIds); 10746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 10766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an {@link AccessibilityEvent} with information about the 10776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * specified item. 10786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1079049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * The helper class automatically populates the following fields based on 1080049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the values set by 1081049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}, 1082049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * but implementations may optionally override them: 10836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1084049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>event text, see {@link AccessibilityEvent#getText()} 1085049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>content description, see 1086049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityEvent#setContentDescription(CharSequence)} 1087049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>scrollability, see {@link AccessibilityEvent#setScrollable(boolean)} 1088049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>password state, see {@link AccessibilityEvent#setPassword(boolean)} 1089049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>enabled state, see {@link AccessibilityEvent#setEnabled(boolean)} 1090049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>checked state, see {@link AccessibilityEvent#setChecked(boolean)} 10916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 10926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 10936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The following required fields are automatically populated by the 10946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * helper class and may not be overridden: 10956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1096049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>item class name, set to the value used in 1097049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)} 10986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>package name, set to the package of the host view's 10996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link Context}, see {@link AccessibilityEvent#setPackageName} 11006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>event source, set to the host view and virtual view identifier, 11016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * see {@link AccessibilityRecordCompat#setSource(View, int)} 11026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 11046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view id for the item for which to 11056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * populate the event 11066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param event The event to populate 11076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 1108049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) { 1109049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Default implementation is no-op. 1110049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 11116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 11126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 1113fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * Populates an {@link AccessibilityEvent} with information about the host 1114fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * view. 1115fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * <p> 1116fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * The default implementation is a no-op. 1117fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * 1118fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * @param event the event to populate with information about the host view 1119fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette */ 1120fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette protected void onPopulateEventForHost(AccessibilityEvent event) { 1121fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette // Default implementation is no-op. 1122fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette } 1123fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette 1124fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette /** 11256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an {@link AccessibilityNodeInfoCompat} with information 11266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * about the specified item. 11276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1128049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Implementations <strong>must</strong> populate the following required 1129049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * fields: 11306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1131049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>event text, see 1132049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setText(CharSequence)} or 1133049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setContentDescription(CharSequence)} 11346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>bounds in parent coordinates, see 1135049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setBoundsInParent(Rect)} 11366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class automatically populates the following fields with 11396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * default values, but implementations may optionally override them: 11406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1141049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>enabled state, set to {@code true}, see 1142049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setEnabled(boolean)} 1143049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>keyboard focusability, set to {@code true}, see 1144049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setFocusable(boolean)} 1145049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>item class name, set to {@code android.view.View}, see 1146049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setClassName(CharSequence)} 11476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The following required fields are automatically populated by the 11506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * helper class and may not be overridden: 11516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 11526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>package name, identical to the package name set by 1153049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateEventForVirtualView(int, AccessibilityEvent)}, see 11546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setPackageName} 11556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>node source, identical to the event source set in 1156049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateEventForVirtualView(int, AccessibilityEvent)}, see 11576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setSource(View, int)} 11586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>parent view, set to the host view, see 11596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setParent(View)} 11606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>visibility, computed based on parent-relative bounds, see 1161049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setVisibleToUser(boolean)} 11626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>accessibility focus, computed based on internal helper state, see 1163049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setAccessibilityFocused(boolean)} 1164049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>keyboard focus, computed based on internal helper state, see 1165049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setFocused(boolean)} 11666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>bounds in screen coordinates, computed based on host view bounds, 1167049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * see {@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)} 11686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1170049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Additionally, the helper class automatically handles keyboard focus and 1171049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * accessibility focus management by adding the appropriate 1172049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_FOCUS}, 1173049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_FOCUS}, 1174049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_ACCESSIBILITY_FOCUS}, or 11756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_ACCESSIBILITY_FOCUS} 1176049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * actions. Implementations must <strong>never</strong> manually add these 1177049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * actions. 11786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class also automatically modifies parent- and 11806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * screen-relative bounds to reflect the portion of the item visible 11816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * within its parent. 11826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 11836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view identifier of the item for 11846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * which to populate the node 11856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param node The node to populate 11866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 11876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract void onPopulateNodeForVirtualView( 11886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette int virtualViewId, AccessibilityNodeInfoCompat node); 11896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 11906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 119112d8b3f36c7b503221185b44791822e59e690966Alan Viverette * Populates an {@link AccessibilityNodeInfoCompat} with information 119212d8b3f36c7b503221185b44791822e59e690966Alan Viverette * about the host view. 119312d8b3f36c7b503221185b44791822e59e690966Alan Viverette * <p> 1194fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * The default implementation is a no-op. 1195fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * 1196fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * @param node the node to populate with information about the host view 119712d8b3f36c7b503221185b44791822e59e690966Alan Viverette */ 1198fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette protected void onPopulateNodeForHost(AccessibilityNodeInfoCompat node) { 119912d8b3f36c7b503221185b44791822e59e690966Alan Viverette // Default implementation is no-op. 120012d8b3f36c7b503221185b44791822e59e690966Alan Viverette } 120112d8b3f36c7b503221185b44791822e59e690966Alan Viverette 120212d8b3f36c7b503221185b44791822e59e690966Alan Viverette /** 12036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Performs the specified accessibility action on the item associated 12046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * with the virtual view identifier. See 12056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#performAction(int, Bundle)} for 12066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * more information. 12076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1208049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Implementations <strong>must</strong> handle any actions added manually 1209049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * in 1210049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 12116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 12126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class automatically handles focus management resulting 12136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * from {@link AccessibilityNodeInfoCompat#ACTION_ACCESSIBILITY_FOCUS} 12146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and 12156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_ACCESSIBILITY_FOCUS} 12166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * actions. 12176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 12186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view identifier of the item on which 12196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * to perform the action 12206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param action The accessibility action to perform 12216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param arguments (Optional) A bundle with additional arguments, or 12226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * null 12236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return true if the action was performed 12246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 12256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract boolean onPerformActionForVirtualView( 12266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette int virtualViewId, int action, Bundle arguments); 12276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 12286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 1229049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Exposes a virtual view hierarchy to the accessibility framework. 12306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 1231049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private class MyNodeProvider extends AccessibilityNodeProviderCompat { 12326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 12336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public AccessibilityNodeInfoCompat createAccessibilityNodeInfo(int virtualViewId) { 12347c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette // The caller takes ownership of the node and is expected to 12357c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette // recycle it when done, so always return a copy. 12367c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette final AccessibilityNodeInfoCompat node = 12377c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette ExploreByTouchHelper.this.obtainAccessibilityNodeInfo(virtualViewId); 12387c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette return AccessibilityNodeInfoCompat.obtain(node); 12396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 12416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 12426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public boolean performAction(int virtualViewId, int action, Bundle arguments) { 12436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return ExploreByTouchHelper.this.performAction(virtualViewId, action, arguments); 12446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette} 1247