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 1116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** System accessibility manager, used to check state and send events. */ 1126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final AccessibilityManager mManager; 1136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** View whose internal structure is exposed through this helper. */ 115049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private final View mHost; 1166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 117049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Virtual node provider used to expose logical structure to services. */ 118049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private MyNodeProvider mNodeProvider; 1196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 120049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that holds accessibility focus. */ 121049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private int mAccessibilityFocusedVirtualViewId = INVALID_ID; 1226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 123049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that holds keyboard focus. */ 124049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private int mKeyboardFocusedVirtualViewId = INVALID_ID; 125049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 126049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that is currently hovered. */ 1276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private int mHoveredVirtualViewId = INVALID_ID; 1286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 130049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Constructs a new helper that can expose a virtual view hierarchy for the 131049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * specified host view. 1326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 133049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param host view whose virtual view hierarchy is exposed by this helper 1346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 135049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public ExploreByTouchHelper(View host) { 136049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (host == null) { 1376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new IllegalArgumentException("View may not be null"); 1386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 140049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost = host; 141049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 142049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final Context context = host.getContext(); 1436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mManager = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE); 144049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 145049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Host view must be focusable so that we can delegate to virtual 146049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // views. 147049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette host.setFocusable(true); 1487f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette if (ViewCompat.getImportantForAccessibility(host) 1497f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 1507f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette ViewCompat.setImportantForAccessibility( 1517f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette host, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES); 152049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 1566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public AccessibilityNodeProviderCompat getAccessibilityNodeProvider(View host) { 1576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (mNodeProvider == null) { 158049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mNodeProvider = new MyNodeProvider(); 1596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return mNodeProvider; 1616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 164049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates hover events from the host view. 165049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 1666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Dispatches hover {@link MotionEvent}s to the virtual view hierarchy when 1676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * the Explore by Touch feature is enabled. 1686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 169049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 170049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#dispatchHoverEvent(MotionEvent)} method: 1716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre>@Override 1726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * public boolean dispatchHoverEvent(MotionEvent event) { 173049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchHoverEvent(this, event) 174049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchHoverEvent(event); 1756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * } 1766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 1776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 1786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param event The hover event to dispatch to the virtual view hierarchy. 1796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return Whether the hover event was handled. 1806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 181049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean dispatchHoverEvent(@NonNull MotionEvent event) { 1826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (!mManager.isEnabled() 1836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette || !AccessibilityManagerCompat.isTouchExplorationEnabled(mManager)) { 1846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 1856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (event.getAction()) { 1886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_MOVE: 1896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_ENTER: 1906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int virtualViewId = getVirtualViewAt(event.getX(), event.getY()); 1916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette updateHoveredVirtualView(virtualViewId); 1926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return (virtualViewId != INVALID_ID); 1936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_EXIT: 194049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != INVALID_ID) { 1956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette updateHoveredVirtualView(INVALID_ID); 1966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return true; 1976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 1996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 2006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 2016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 2026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 2036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 2046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 205049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates key events from the host view. 206049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 207049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 208049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#dispatchKeyEvent(KeyEvent)} method: 209049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <pre>@Override 210049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean dispatchKeyEvent(KeyEvent event) { 211049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchKeyEvent(event) 212049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchKeyEvent(event); 213049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 214049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * </pre> 215049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 216049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean dispatchKeyEvent(@NonNull KeyEvent event) { 217049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette boolean handled = false; 218049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 219049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int action = event.getAction(); 220049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (action != KeyEvent.ACTION_UP) { 221049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int keyCode = event.getKeyCode(); 222049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (keyCode) { 223049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_LEFT: 224049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_UP: 225049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_RIGHT: 226049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_DOWN: 227049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 228049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int direction = keyToDirection(keyCode); 229049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int count = 1 + event.getRepeatCount(); 230049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette for (int i = 0; i < count; i++) { 231049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (moveFocus(direction, null)) { 232049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = true; 233049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 234049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 235049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 236049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 237049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 238049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 239049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_CENTER: 240049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_ENTER: 241049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 242049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (event.getRepeatCount() == 0) { 243049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clickKeyboardFocusedVirtualView(); 244049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = true; 245049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 246049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 247049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 248049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_TAB: 249049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 250049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = moveFocus(View.FOCUS_FORWARD, null); 251049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) { 252049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = moveFocus(View.FOCUS_BACKWARD, null); 253049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 254049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 255049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 256049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 257049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 258049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return handled; 259049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 260049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 261049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 262049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates focus changes from the host view. 263049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 264049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 265049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#onFocusChanged(boolean, int, Rect)} method: 266049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <pre>@Override 267049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean onFocusChanged(boolean gainFocus, int direction, 268049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Rect previouslyFocusedRect) { 269049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 270049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * mHelper.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 271049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 272049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * </pre> 273049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 274049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void onFocusChanged(boolean gainFocus, int direction, 275049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Nullable Rect previouslyFocusedRect) { 276049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 277049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearKeyboardFocusForVirtualView(mKeyboardFocusedVirtualViewId); 278049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 279049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 280049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (gainFocus) { 281049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette moveFocus(direction, previouslyFocusedRect); 282049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 283049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 284049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 285049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 286049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has accessibility focus 287049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has accessibility 288049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * focus 289049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 290049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final int getAccessibilityFocusedVirtualViewId() { 291049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mAccessibilityFocusedVirtualViewId; 292049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 293049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 294049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 295049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has keyboard focus 296049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has keyboard focus 297049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 298049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final int getKeyboardFocusedVirtualViewId() { 299049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mKeyboardFocusedVirtualViewId; 300049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 301049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 302049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 303049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Maps key event codes to focus directions. 304049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 305049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param keyCode the key event code 306049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the corresponding focus direction 307049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 308049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @FocusRealDirection 309049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static int keyToDirection(int keyCode) { 310049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (keyCode) { 311049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_LEFT: 312049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_LEFT; 313049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_UP: 314049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_UP; 315049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_RIGHT: 316049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_RIGHT; 317049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 318049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_DOWN; 319049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 320049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 321049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 322049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 323049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains the bounds for the specified virtual view. 324049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 325049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view 326049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param outBounds the rect to populate with virtual view bounds 327049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 328049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private void getBoundsInParent(int virtualViewId, Rect outBounds) { 329049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node = obtainAccessibilityNodeInfo(virtualViewId); 330049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.getBoundsInParent(outBounds); 331049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 332049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 333049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 334049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Adapts AccessibilityNodeInfoCompat for obtaining bounds. 335049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 336049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static final FocusStrategy.BoundsAdapter<AccessibilityNodeInfoCompat> NODE_ADAPTER = 337049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette new FocusStrategy.BoundsAdapter<AccessibilityNodeInfoCompat>() { 338049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 339049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public void obtainBounds(AccessibilityNodeInfoCompat node, Rect outBounds) { 340049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.getBoundsInParent(outBounds); 341049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 342049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette }; 343049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 344049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 345e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette * Adapts SparseArrayCompat for iterating through values. 346049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 347e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette private static final FocusStrategy.CollectionAdapter<SparseArrayCompat< 348e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette AccessibilityNodeInfoCompat>, AccessibilityNodeInfoCompat> SPARSE_VALUES_ADAPTER = 349e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette new FocusStrategy.CollectionAdapter<SparseArrayCompat< 350e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette AccessibilityNodeInfoCompat>, AccessibilityNodeInfoCompat>() { 351049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 352049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public AccessibilityNodeInfoCompat get( 353e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette SparseArrayCompat<AccessibilityNodeInfoCompat> collection, int index) { 354049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return collection.valueAt(index); 355049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 356049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 357049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 358e69072d0197b6360882acd76d4f0271727cfe5bcAlan Viverette public int size(SparseArrayCompat<AccessibilityNodeInfoCompat> collection) { 359049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return collection.size(); 360049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 361049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette }; 362049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 363049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 364049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to move keyboard focus in the specified direction. 365049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 366049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param direction the direction in which to move keyboard focus 367049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param previouslyFocusedRect the bounds of the previously focused item, 368049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@code null} if not available 369049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if keyboard focus moved to a virtual view managed 370049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * by this helper, or {@code false} otherwise 371049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 372049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private boolean moveFocus(@FocusDirection int direction, @Nullable Rect previouslyFocusedRect) { 3731b327048091c92b5f46981792930aba4ab122c30Alan Viverette final SparseArrayCompat<AccessibilityNodeInfoCompat> allNodes = getAllNodes(); 3741b327048091c92b5f46981792930aba4ab122c30Alan Viverette 375049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int focusedNodeId = mKeyboardFocusedVirtualViewId; 376049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat focusedNode = 3771b327048091c92b5f46981792930aba4ab122c30Alan Viverette focusedNodeId == INVALID_ID ? null : allNodes.get(focusedNodeId); 378049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 379049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat nextFocusedNode; 380049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (direction) { 381049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_FORWARD: 382049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_BACKWARD: 383049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final boolean isLayoutRtl = 384049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.getLayoutDirection(mHost) == ViewCompat.LAYOUT_DIRECTION_RTL; 3851b327048091c92b5f46981792930aba4ab122c30Alan Viverette nextFocusedNode = FocusStrategy.findNextFocusInRelativeDirection(allNodes, 386049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette SPARSE_VALUES_ADAPTER, NODE_ADAPTER, focusedNode, direction, isLayoutRtl, 387049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette false); 388049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 389049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_LEFT: 390049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_UP: 391049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_RIGHT: 392049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_DOWN: 393049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final Rect selectedRect = new Rect(); 394049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 395049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from a virtual view within the host. 396049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette getBoundsInParent(mKeyboardFocusedVirtualViewId, selectedRect); 397049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (previouslyFocusedRect != null) { 398049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from a real view outside the host. 399049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette selectedRect.set(previouslyFocusedRect); 400049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 401049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from... somewhere? Make a guess. 402049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Usually this happens when another view was too lazy 403049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // to pass the previously focused rect (ex. ScrollView 404049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // when moving UP or DOWN). 405049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette guessPreviouslyFocusedRect(mHost, direction, selectedRect); 406049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 4071b327048091c92b5f46981792930aba4ab122c30Alan Viverette nextFocusedNode = FocusStrategy.findNextFocusInAbsoluteDirection(allNodes, 408049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette SPARSE_VALUES_ADAPTER, NODE_ADAPTER, focusedNode, selectedRect, direction); 409049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 410049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 411049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette throw new IllegalArgumentException("direction must be one of " 412049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "{FOCUS_FORWARD, FOCUS_BACKWARD, FOCUS_UP, FOCUS_DOWN, " 413049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "FOCUS_LEFT, FOCUS_RIGHT}."); 414049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 415049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 416049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int nextFocusedNodeId; 417049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (nextFocusedNode == null) { 418049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNodeId = INVALID_ID; 419049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 4201b327048091c92b5f46981792930aba4ab122c30Alan Viverette final int index = allNodes.indexOfValue(nextFocusedNode); 4211b327048091c92b5f46981792930aba4ab122c30Alan Viverette nextFocusedNodeId = allNodes.keyAt(index); 422049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 423049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 424049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return requestKeyboardFocusForVirtualView(nextFocusedNodeId); 425049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 426049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 4271b327048091c92b5f46981792930aba4ab122c30Alan Viverette private SparseArrayCompat<AccessibilityNodeInfoCompat> getAllNodes() { 4281b327048091c92b5f46981792930aba4ab122c30Alan Viverette final List<Integer> virtualViewIds = new ArrayList<>(); 4291b327048091c92b5f46981792930aba4ab122c30Alan Viverette getVisibleVirtualViews(virtualViewIds); 4301b327048091c92b5f46981792930aba4ab122c30Alan Viverette 4311b327048091c92b5f46981792930aba4ab122c30Alan Viverette final SparseArrayCompat<AccessibilityNodeInfoCompat> allNodes = new SparseArrayCompat<>(); 4321b327048091c92b5f46981792930aba4ab122c30Alan Viverette for (int virtualViewId = 0; virtualViewId < virtualViewIds.size(); virtualViewId++) { 4331b327048091c92b5f46981792930aba4ab122c30Alan Viverette final AccessibilityNodeInfoCompat virtualView = createNodeForChild(virtualViewId); 4341b327048091c92b5f46981792930aba4ab122c30Alan Viverette allNodes.put(virtualViewId, virtualView); 4351b327048091c92b5f46981792930aba4ab122c30Alan Viverette } 4361b327048091c92b5f46981792930aba4ab122c30Alan Viverette 4371b327048091c92b5f46981792930aba4ab122c30Alan Viverette return allNodes; 4381b327048091c92b5f46981792930aba4ab122c30Alan Viverette } 4391b327048091c92b5f46981792930aba4ab122c30Alan Viverette 440049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 441049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains a best guess for the previously focused rect for keyboard focus 442049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * moving in the specified direction. 443049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 444049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param host the view into which focus is moving 445049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param direction the absolute direction in which focus is moving 446049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param outBounds the rect to populate with the best-guess bounds for the 447049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * previous focus rect 448049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 449049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static Rect guessPreviouslyFocusedRect(@NonNull View host, 450049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @FocusRealDirection int direction, @NonNull Rect outBounds) { 451049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int w = host.getWidth(); 452049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int h = host.getHeight(); 453049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 454049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (direction) { 455049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_LEFT: 456049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(w, 0, w, h); 457049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 458049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_UP: 459049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(0, h, w, h); 460049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 461049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_RIGHT: 462049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(-1, 0, -1, h); 463049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 464049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_DOWN: 465049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(0, -1, w, -1); 466049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 467049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 468049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette throw new IllegalArgumentException("direction must be one of " 469049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "{FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT}."); 470049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 471049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 472049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return outBounds; 473049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 474049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 475049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 476049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Performs a click action on the keyboard focused virtual view, if any. 477049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 478049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if the click action was performed successfully or 479049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@code false} otherwise 480049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 481049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private boolean clickKeyboardFocusedVirtualView() { 482049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mKeyboardFocusedVirtualViewId != INVALID_ID && onPerformActionForVirtualView( 483049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId, AccessibilityNodeInfoCompat.ACTION_CLICK, null); 484049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 485049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 486049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 4876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an event of the specified type with information about an item 4886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and attempts to send it up through the view hierarchy. 4896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 4906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * You should call this method after performing a user action that normally 4916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * fires an accessibility event, such as clicking on an item. 492049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 4936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre>public void performItemClick(T item) { 4946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * ... 4956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * sendEventForVirtualViewId(item.id, AccessibilityEvent.TYPE_VIEW_CLICKED); 4966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * } 4976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 4986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 499049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view for which to 500049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * send an event 501049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to send 502049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if the event was sent successfully, {@code false} 503049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * otherwise 5046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 505049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean sendEventForVirtualView(int virtualViewId, int eventType) { 5066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((virtualViewId == INVALID_ID) || !mManager.isEnabled()) { 5076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 5086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 510049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ViewParent parent = mHost.getParent(); 5116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (parent == null) { 5126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 5136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = createEvent(virtualViewId, eventType); 516049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return ViewParentCompat.requestSendAccessibilityEvent(parent, mHost, event); 5176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 5206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Notifies the accessibility framework that the properties of the parent 5216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * view have changed. 5226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 523049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after adding or removing 524049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * items from the parent view. 5256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 526049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateRoot() { 527722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette invalidateVirtualView(HOST_ID, AccessibilityEventCompat.CONTENT_CHANGE_TYPE_SUBTREE); 5286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 5316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Notifies the accessibility framework that the properties of a particular 5326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * item have changed. 5336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 534049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after changing any of the 535049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * properties set in 536049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 5376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 538049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id to invalidate, or 539049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #HOST_ID} to invalidate the root view 540722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * @see #invalidateVirtualView(int, int) 5416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 542049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateVirtualView(int virtualViewId) { 543722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette invalidateVirtualView(virtualViewId, 544722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.CONTENT_CHANGE_TYPE_UNDEFINED); 545722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 546722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette 547722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette /** 548722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * Notifies the accessibility framework that the properties of a particular 549722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * item have changed. 550722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <p> 551049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after changing any of the 552049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * properties set in 553049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 554722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * 555049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id to invalidate, or 556049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #HOST_ID} to invalidate the root view 557049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param changeTypes the bit mask of change types. May be {@code 0} for the 558722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * default (undefined) change type or one or more of: 559722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <ul> 560722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION} 561722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_SUBTREE} 562722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_TEXT} 563722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_UNDEFINED} 564722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * </ul> 565722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette */ 566049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateVirtualView(int virtualViewId, int changeTypes) { 567722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette if (virtualViewId != INVALID_ID && mManager.isEnabled()) { 568049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ViewParent parent = mHost.getParent(); 569722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette if (parent != null) { 570049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Send events up the hierarchy so they can be coalesced. 571722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette final AccessibilityEvent event = createEvent(virtualViewId, 572722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.TYPE_WINDOW_CONTENT_CHANGED); 573722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.setContentChangeTypes(event, changeTypes); 574049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewParentCompat.requestSendAccessibilityEvent(parent, mHost, event); 575722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 576722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 5776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 580049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Returns the virtual view ID for the currently accessibility focused 581049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * item. 582148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette * 583049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has accessibility focus 584049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has accessibility 585049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * focus 586049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @deprecated Use {@link #getAccessibilityFocusedVirtualViewId()}. 587148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette */ 588049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Deprecated 589148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette public int getFocusedVirtualView() { 590049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return getAccessibilityFocusedVirtualViewId(); 591049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 592049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 593049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 594049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Called when the focus state of a virtual view changes. 595049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 596049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view identifier 597049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param hasFocus {@code true} if the view has focus, {@code false} 598049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * otherwise 599049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 600049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette protected void onVirtualViewKeyboardFocusChanged(int virtualViewId, boolean hasFocus) { 601049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Stub method. 602148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette } 603148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette 604148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette /** 6056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Sets the currently hovered item, sending hover accessibility events as 6066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * necessary to maintain the correct state. 6076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 608049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item currently being 609049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * hovered, or {@link #INVALID_ID} if no item is 610049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * hovered within the parent view 6116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private void updateHoveredVirtualView(int virtualViewId) { 6136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (mHoveredVirtualViewId == virtualViewId) { 6146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return; 6156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int previousVirtualViewId = mHoveredVirtualViewId; 6186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mHoveredVirtualViewId = virtualViewId; 6196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Stay consistent with framework behavior by sending ENTER/EXIT pairs 6216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // in reverse order. This is accurate as of API 18. 6226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEventCompat.TYPE_VIEW_HOVER_ENTER); 6236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView( 6246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette previousVirtualViewId, AccessibilityEventCompat.TYPE_VIEW_HOVER_EXIT); 6256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} for the specified 62912d8b3f36c7b503221185b44791822e59e690966Alan Viverette * virtual view id, which includes the host view ({@link #HOST_ID}). 6306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 631049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item for which to 632049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct an event 633049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 634049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 635049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEvent(int virtualViewId, int eventType) { 6386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (virtualViewId) { 63912d8b3f36c7b503221185b44791822e59e690966Alan Viverette case HOST_ID: 6406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return createEventForHost(eventType); 6416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 6426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return createEventForChild(virtualViewId, eventType); 6436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} for the host node. 6486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 649049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 650049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 651049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEventForHost(int eventType) { 6546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 655049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.onInitializeAccessibilityEvent(mHost, event); 6567f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette return event; 6577f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette } 6587f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 6597f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette @Override 6607f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { 6617f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette super.onInitializeAccessibilityEvent(host, event); 662fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette 663fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette // Allow the client to populate the event. 664fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette onPopulateEventForHost(event); 6656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} populated with 6696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * information about the specified item. 6706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 671049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item for which to 672049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct an event 673049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 674049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 675049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEventForChild(int virtualViewId, int eventType) { 6786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 679049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event); 680049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node = obtainAccessibilityNodeInfo(virtualViewId); 681049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 682049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Allow the client to override these properties, 683049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.getText().add(node.getText()); 684049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setContentDescription(node.getContentDescription()); 685049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setScrollable(node.isScrollable()); 686049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setPassword(node.isPassword()); 687049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setEnabled(node.isEnabled()); 688049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setChecked(node.isChecked()); 6896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Allow the client to populate the event. 6916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette onPopulateEventForVirtualView(virtualViewId, event); 6926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Make sure the developer is following the rules. 6946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (event.getText().isEmpty() && (event.getContentDescription() == null)) { 6956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must add text or a content description in " 6966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateEventForVirtualViewId()"); 6976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Don't allow the client to override these properties. 700049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setClassName(node.getClassName()); 701049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setSource(mHost, virtualViewId); 702049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette event.setPackageName(mHost.getContext().getPackageName()); 7036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return event; 7056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 708049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains a populated {@link AccessibilityNodeInfoCompat} for the 709049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * virtual view with the specified identifier. 710049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 711049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method may be called with identifier {@link #HOST_ID} to obtain a 712049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * node for the host view. 7136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 714049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view for which to 715049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct a node 716049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} populated with information 717049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * about the specified item 7186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 719049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @NonNull 720049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private AccessibilityNodeInfoCompat obtainAccessibilityNodeInfo(int virtualViewId) { 7211b327048091c92b5f46981792930aba4ab122c30Alan Viverette if (virtualViewId == HOST_ID) { 7221b327048091c92b5f46981792930aba4ab122c30Alan Viverette return createNodeForHost(); 7236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 724049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 7251b327048091c92b5f46981792930aba4ab122c30Alan Viverette return createNodeForChild(virtualViewId); 7266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 7296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the 7306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * host view populated with its virtual descendants. 7316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 732049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} for the parent node 7336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 7341fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette @NonNull 7356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityNodeInfoCompat createNodeForHost() { 7367f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette final AccessibilityNodeInfoCompat info = AccessibilityNodeInfoCompat.obtain(mHost); 7377f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette ViewCompat.onInitializeAccessibilityNodeInfo(mHost, info); 73812d8b3f36c7b503221185b44791822e59e690966Alan Viverette 7396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Add the virtual descendants. 740049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ArrayList<Integer> virtualViewIds = new ArrayList<>(); 7416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette getVisibleVirtualViews(virtualViewIds); 7427f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 7437f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette final int realNodeCount = info.getChildCount(); 744fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette if (realNodeCount > 0 && virtualViewIds.size() > 0) { 745fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette throw new RuntimeException("Views cannot have both real and virtual children"); 746fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette } 7476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 748049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette for (int i = 0, count = virtualViewIds.size(); i < count; i++) { 7497f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette info.addChild(mHost, virtualViewIds.get(i)); 7506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7527f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette return info; 7537f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette } 7547f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 7557f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette @Override 7567f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) { 7577f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette super.onInitializeAccessibilityNodeInfo(host, info); 7587f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette 7597f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette // Allow the client to populate the host node. 7607f62b32cd8fe966a5b1eaa850fb6595347a2564bAlan Viverette onPopulateNodeForHost(info); 7616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 7646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the 7656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * specified item. Automatically manages accessibility focus actions. 7666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 7676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Allows the implementing class to specify most node properties, but 7686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * overrides the following: 7696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 7706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setPackageName} 7716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setClassName} 7726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setParent(View)} 7736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setSource(View, int)} 7746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser} 7756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)} 7766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 7776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 7786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Uses the bounds of the parent view and the parent-relative bounding 7796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * rectangle specified by 7806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#getBoundsInParent} to automatically 7816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * update the following properties: 7826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 7836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser} 7846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setBoundsInParent} 7856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 7866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 787049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for item for which to construct 788049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * a node 789049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} for the specified item 7906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 7911fe6cc2f16121bc57f6a89aaa5502e47ab3e8fe9Alan Viverette @NonNull 7926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityNodeInfoCompat createNodeForChild(int virtualViewId) { 7936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityNodeInfoCompat node = AccessibilityNodeInfoCompat.obtain(); 7946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Ensure the client has good defaults. 7966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setEnabled(true); 797049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setFocusable(true); 7986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setClassName(DEFAULT_CLASS_NAME); 799cc35612e283564c245408da4bb9264f38a02487aAlan Viverette node.setBoundsInParent(INVALID_PARENT_BOUNDS); 8000906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette node.setBoundsInScreen(INVALID_PARENT_BOUNDS); 8016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Allow the client to populate the node. 8036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette onPopulateNodeForVirtualView(virtualViewId, node); 8046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Make sure the developer is following the rules. 8066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((node.getText() == null) && (node.getContentDescription() == null)) { 8076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must add text or a content description in " 8086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.getBoundsInParent(mTempParentRect); 812cc35612e283564c245408da4bb9264f38a02487aAlan Viverette if (mTempParentRect.equals(INVALID_PARENT_BOUNDS)) { 8136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must set parent bounds in " 8146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int actions = node.getActions(); 8186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((actions & AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS) != 0) { 8196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must not add ACTION_ACCESSIBILITY_FOCUS in " 8206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((actions & AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS) != 0) { 8236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must not add ACTION_CLEAR_ACCESSIBILITY_FOCUS in " 8246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Don't allow the client to override these properties. 828049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setPackageName(mHost.getContext().getPackageName()); 829049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setSource(mHost, virtualViewId); 830049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setParent(mHost); 8316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Manage internal accessibility focus state. 833049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId == virtualViewId) { 8346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setAccessibilityFocused(true); 8356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 8366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } else { 8376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setAccessibilityFocused(false); 8386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS); 8396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 841049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Manage internal keyboard focus state. 842049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final boolean isFocused = mKeyboardFocusedVirtualViewId == virtualViewId; 843049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (isFocused) { 844049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_FOCUS); 845049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (node.isFocusable()) { 846049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_FOCUS); 847049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 848049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setFocused(isFocused); 849049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 8506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Set the visibility based on the parent bound. 8516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (intersectVisibleToUser(mTempParentRect)) { 8526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setVisibleToUser(true); 8536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setBoundsInParent(mTempParentRect); 8546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8560906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette // If not explicitly specified, calculate screen-relative bounds and 8570906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette // offset for scroll position based on bounds in parent. 8580906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette node.getBoundsInScreen(mTempScreenRect); 8590906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette if (mTempScreenRect.equals(INVALID_PARENT_BOUNDS)) { 8600906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette mHost.getLocationOnScreen(mTempGlobalRect); 8610906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette node.getBoundsInParent(mTempScreenRect); 8620906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette mTempScreenRect.offset(mTempGlobalRect[0] - mHost.getScrollX(), 8630906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette mTempGlobalRect[1] - mHost.getScrollY()); 8640906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette node.setBoundsInScreen(mTempScreenRect); 8650906dafe25770e872a72f8abd2c044b0faef86d7Alan Viverette } 8666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return node; 8686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performAction(int virtualViewId, int action, Bundle arguments) { 8716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (virtualViewId) { 87212d8b3f36c7b503221185b44791822e59e690966Alan Viverette case HOST_ID: 8736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return performActionForHost(action, arguments); 8746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 8756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return performActionForChild(virtualViewId, action, arguments); 8766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performActionForHost(int action, Bundle arguments) { 880049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return ViewCompat.performAccessibilityAction(mHost, action, arguments); 8816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performActionForChild(int virtualViewId, int action, Bundle arguments) { 8846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (action) { 8856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS: 886148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return requestAccessibilityFocus(virtualViewId); 8876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS: 888148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return clearAccessibilityFocus(virtualViewId); 889049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case AccessibilityNodeInfoCompat.ACTION_FOCUS: 890049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return requestKeyboardFocusForVirtualView(virtualViewId); 891049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case AccessibilityNodeInfoCompat.ACTION_CLEAR_FOCUS: 892049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return clearKeyboardFocusForVirtualView(virtualViewId); 8936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 894049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return onPerformActionForVirtualView(virtualViewId, action, arguments); 8956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 8996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Computes whether the specified {@link Rect} intersects with the visible 9006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * portion of its parent {@link View}. Modifies {@code localRect} to contain 9016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * only the visible portion. 9026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 903049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param localRect a rectangle in local (parent) coordinates 904049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether the specified {@link Rect} is visible on the screen 9056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 9066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean intersectVisibleToUser(Rect localRect) { 9076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Missing or empty bounds mean this view is not visible. 9086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((localRect == null) || localRect.isEmpty()) { 9096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Attached to invisible window means this view is not visible. 913049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mHost.getWindowVisibility() != View.VISIBLE) { 9146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // An invisible predecessor means that this view is not visible. 918049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewParent viewParent = mHost.getParent(); 9196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette while (viewParent instanceof View) { 9206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final View view = (View) viewParent; 9216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((ViewCompat.getAlpha(view) <= 0) || (view.getVisibility() != View.VISIBLE)) { 9226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette viewParent = view.getParent(); 9256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // A null parent implies the view is not visible. 9286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (viewParent == null) { 9296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // If no portion of the parent is visible, this view is not visible. 933049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (!mHost.getLocalVisibleRect(mTempVisibleRect)) { 9346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Check if the view intersects the visible portion of the parent. 9386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return localRect.intersect(mTempVisibleRect); 9396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 9426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Attempts to give accessibility focus to a virtual view. 9436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 9446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * A virtual view will not actually take focus if 9456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityManager#isEnabled()} returns false, 9466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityManager#isTouchExplorationEnabled()} returns false, 9476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * or the view already has accessibility focus. 9486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 949049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view on which to 950049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * place accessibility focus 951049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually took accessibility focus 9526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 9536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean requestAccessibilityFocus(int virtualViewId) { 9546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (!mManager.isEnabled() 9556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette || !AccessibilityManagerCompat.isTouchExplorationEnabled(mManager)) { 9566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // TODO: Check virtual view visibility. 959049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != virtualViewId) { 960f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette // Clear focus from the previously focused view, if applicable. 961049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != INVALID_ID) { 962049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearAccessibilityFocus(mAccessibilityFocusedVirtualViewId); 963f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette } 964f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette 965f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette // Set focus on the new view. 966049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mAccessibilityFocusedVirtualViewId = virtualViewId; 967f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette 9686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // TODO: Only invalidate virtual view bounds. 969049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.invalidate(); 9706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, 9716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette AccessibilityEventCompat.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 9726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return true; 9736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 9786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Attempts to clear accessibility focus from a virtual view. 979148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette * 980049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view from which to 981049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * clear accessibility focus 982049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually cleared accessibility focus 9836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 984148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette private boolean clearAccessibilityFocus(int virtualViewId) { 985049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId == virtualViewId) { 986049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mAccessibilityFocusedVirtualViewId = INVALID_ID; 987049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.invalidate(); 9886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, 9896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette AccessibilityEventCompat.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 990148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return true; 9916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 992148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return false; 9936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 996049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to give keyboard focus to a virtual view. 997049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 998049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view on which to 999049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * place keyboard focus 1000049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually took keyboard focus 1001049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 1002049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean requestKeyboardFocusForVirtualView(int virtualViewId) { 1003049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (!mHost.isFocused() && !mHost.requestFocus()) { 1004049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Host must have real keyboard focus. 1005049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1006049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1007049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1008049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId == virtualViewId) { 1009049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // The virtual view already has focus. 1010049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1011049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1012049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1013049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 1014049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearKeyboardFocusForVirtualView(mKeyboardFocusedVirtualViewId); 1015049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1016049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1017049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId = virtualViewId; 1018049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1019049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette onVirtualViewKeyboardFocusChanged(virtualViewId, true); 1020049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEvent.TYPE_VIEW_FOCUSED); 1021049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1022049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return true; 1023049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1024049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1025049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 1026049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to clear keyboard focus from a virtual view. 1027049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 1028049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view from which to 1029049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * clear keyboard focus 1030049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually cleared keyboard focus 1031049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 1032049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean clearKeyboardFocusForVirtualView(int virtualViewId) { 1033049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != virtualViewId) { 1034049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // The virtual view is not focused. 1035049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1036049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1037049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1038049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId = INVALID_ID; 1039049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1040049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette onVirtualViewKeyboardFocusChanged(virtualViewId, false); 1041049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEvent.TYPE_VIEW_FOCUSED); 1042049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1043049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return true; 1044049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1045049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1046049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 10476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Provides a mapping between view-relative coordinates and logical 10486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * items. 10496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param x The view-relative x coordinate 10516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param y The view-relative y coordinate 10526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return virtual view identifier for the logical item under 105312d8b3f36c7b503221185b44791822e59e690966Alan Viverette * coordinates (x,y) or {@link #HOST_ID} if there is no item at 1054cd9978cdf0c3852189fb881846db6569d43f5598Alan Viverette * the given coordinates 10556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 10566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract int getVirtualViewAt(float x, float y); 10576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 10596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates a list with the view's visible items. The ordering of items 10606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * within {@code virtualViewIds} specifies order of accessibility focus 10616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * traversal. 10626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewIds The list to populate with visible items 10646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 10656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract void getVisibleVirtualViews(List<Integer> virtualViewIds); 10666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 10686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an {@link AccessibilityEvent} with information about the 10696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * specified item. 10706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1071049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * The helper class automatically populates the following fields based on 1072049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the values set by 1073049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}, 1074049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * but implementations may optionally override them: 10756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1076049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>event text, see {@link AccessibilityEvent#getText()} 1077049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>content description, see 1078049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityEvent#setContentDescription(CharSequence)} 1079049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>scrollability, see {@link AccessibilityEvent#setScrollable(boolean)} 1080049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>password state, see {@link AccessibilityEvent#setPassword(boolean)} 1081049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>enabled state, see {@link AccessibilityEvent#setEnabled(boolean)} 1082049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>checked state, see {@link AccessibilityEvent#setChecked(boolean)} 10836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 10846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 10856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The following required fields are automatically populated by the 10866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * helper class and may not be overridden: 10876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1088049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>item class name, set to the value used in 1089049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)} 10906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>package name, set to the package of the host view's 10916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link Context}, see {@link AccessibilityEvent#setPackageName} 10926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>event source, set to the host view and virtual view identifier, 10936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * see {@link AccessibilityRecordCompat#setSource(View, int)} 10946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 10956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view id for the item for which to 10976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * populate the event 10986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param event The event to populate 10996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 1100049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) { 1101049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Default implementation is no-op. 1102049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 11036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 11046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 1105fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * Populates an {@link AccessibilityEvent} with information about the host 1106fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * view. 1107fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * <p> 1108fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * The default implementation is a no-op. 1109fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * 1110fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * @param event the event to populate with information about the host view 1111fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette */ 1112fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette protected void onPopulateEventForHost(AccessibilityEvent event) { 1113fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette // Default implementation is no-op. 1114fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette } 1115fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette 1116fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette /** 11176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an {@link AccessibilityNodeInfoCompat} with information 11186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * about the specified item. 11196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1120049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Implementations <strong>must</strong> populate the following required 1121049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * fields: 11226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1123049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>event text, see 1124049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setText(CharSequence)} or 1125049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setContentDescription(CharSequence)} 11266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>bounds in parent coordinates, see 1127049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setBoundsInParent(Rect)} 11286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class automatically populates the following fields with 11316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * default values, but implementations may optionally override them: 11326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1133049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>enabled state, set to {@code true}, see 1134049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setEnabled(boolean)} 1135049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>keyboard focusability, set to {@code true}, see 1136049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setFocusable(boolean)} 1137049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>item class name, set to {@code android.view.View}, see 1138049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setClassName(CharSequence)} 11396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The following required fields are automatically populated by the 11426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * helper class and may not be overridden: 11436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 11446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>package name, identical to the package name set by 1145049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateEventForVirtualView(int, AccessibilityEvent)}, see 11466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setPackageName} 11476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>node source, identical to the event source set in 1148049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateEventForVirtualView(int, AccessibilityEvent)}, see 11496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setSource(View, int)} 11506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>parent view, set to the host view, see 11516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setParent(View)} 11526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>visibility, computed based on parent-relative bounds, see 1153049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setVisibleToUser(boolean)} 11546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>accessibility focus, computed based on internal helper state, see 1155049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setAccessibilityFocused(boolean)} 1156049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>keyboard focus, computed based on internal helper state, see 1157049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setFocused(boolean)} 11586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>bounds in screen coordinates, computed based on host view bounds, 1159049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * see {@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)} 11606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1162049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Additionally, the helper class automatically handles keyboard focus and 1163049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * accessibility focus management by adding the appropriate 1164049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_FOCUS}, 1165049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_FOCUS}, 1166049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_ACCESSIBILITY_FOCUS}, or 11676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_ACCESSIBILITY_FOCUS} 1168049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * actions. Implementations must <strong>never</strong> manually add these 1169049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * actions. 11706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class also automatically modifies parent- and 11726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * screen-relative bounds to reflect the portion of the item visible 11736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * within its parent. 11746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 11756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view identifier of the item for 11766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * which to populate the node 11776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param node The node to populate 11786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 11796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract void onPopulateNodeForVirtualView( 11806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette int virtualViewId, AccessibilityNodeInfoCompat node); 11816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 11826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 118312d8b3f36c7b503221185b44791822e59e690966Alan Viverette * Populates an {@link AccessibilityNodeInfoCompat} with information 118412d8b3f36c7b503221185b44791822e59e690966Alan Viverette * about the host view. 118512d8b3f36c7b503221185b44791822e59e690966Alan Viverette * <p> 1186fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * The default implementation is a no-op. 1187fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * 1188fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * @param node the node to populate with information about the host view 118912d8b3f36c7b503221185b44791822e59e690966Alan Viverette */ 1190fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette protected void onPopulateNodeForHost(AccessibilityNodeInfoCompat node) { 119112d8b3f36c7b503221185b44791822e59e690966Alan Viverette // Default implementation is no-op. 119212d8b3f36c7b503221185b44791822e59e690966Alan Viverette } 119312d8b3f36c7b503221185b44791822e59e690966Alan Viverette 119412d8b3f36c7b503221185b44791822e59e690966Alan Viverette /** 11956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Performs the specified accessibility action on the item associated 11966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * with the virtual view identifier. See 11976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#performAction(int, Bundle)} for 11986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * more information. 11996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1200049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Implementations <strong>must</strong> handle any actions added manually 1201049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * in 1202049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 12036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 12046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class automatically handles focus management resulting 12056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * from {@link AccessibilityNodeInfoCompat#ACTION_ACCESSIBILITY_FOCUS} 12066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and 12076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_ACCESSIBILITY_FOCUS} 12086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * actions. 12096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 12106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view identifier of the item on which 12116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * to perform the action 12126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param action The accessibility action to perform 12136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param arguments (Optional) A bundle with additional arguments, or 12146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * null 12156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return true if the action was performed 12166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 12176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract boolean onPerformActionForVirtualView( 12186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette int virtualViewId, int action, Bundle arguments); 12196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 12206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 1221049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Exposes a virtual view hierarchy to the accessibility framework. 12226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 1223049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private class MyNodeProvider extends AccessibilityNodeProviderCompat { 12246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 12256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public AccessibilityNodeInfoCompat createAccessibilityNodeInfo(int virtualViewId) { 12267c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette // The caller takes ownership of the node and is expected to 12277c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette // recycle it when done, so always return a copy. 12287c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette final AccessibilityNodeInfoCompat node = 12297c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette ExploreByTouchHelper.this.obtainAccessibilityNodeInfo(virtualViewId); 12307c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette return AccessibilityNodeInfoCompat.obtain(node); 12316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 12336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 12346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public boolean performAction(int virtualViewId, int action, Bundle arguments) { 12356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return ExploreByTouchHelper.this.performAction(virtualViewId, action, arguments); 12366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette} 1239