ExploreByTouchHelper.java revision 7c8264ea497e54aa1536c76e553b52d2207a50fb
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; 246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.AccessibilityDelegateCompat; 25049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.support.v4.view.KeyEventCompat; 266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.MotionEventCompat; 276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.ViewCompat; 286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.ViewParentCompat; 296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityEventCompat; 306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityManagerCompat; 316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityNodeInfoCompat; 326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityNodeProviderCompat; 336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.support.v4.view.accessibility.AccessibilityRecordCompat; 34049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.util.SparseArray; 35049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.view.KeyEvent; 366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.MotionEvent; 376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.View; 386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.ViewParent; 396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.accessibility.AccessibilityEvent; 406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport android.view.accessibility.AccessibilityManager; 416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 42049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport java.util.ArrayList; 436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viveretteimport java.util.List; 446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 45049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.support.v4.view.ViewCompat.FocusDirection; 46049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport android.support.v4.view.ViewCompat.FocusRealDirection; 47049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 48049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport static android.support.v4.view.ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO; 49049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viveretteimport static android.support.v4.view.ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES; 50049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette/** 526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * ExploreByTouchHelper is a utility class for implementing accessibility 536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * support in custom {@link View}s that represent a collection of View-like 546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * logical items. It extends {@link AccessibilityNodeProviderCompat} and 556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * simplifies many aspects of providing information to accessibility services 566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and managing accessibility focus. This class does not currently support 576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * hierarchies of logical items. 586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 5912d8b3f36c7b503221185b44791822e59e690966Alan Viverette * Clients should override abstract methods on this class and attach it to the 6012d8b3f36c7b503221185b44791822e59e690966Alan Viverette * host view using {@link ViewCompat#setAccessibilityDelegate}: 61049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre> 63049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * class MyCustomView extends View { 64049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * private MyVirtualViewHelper mVirtualViewHelper; 65049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 66049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public MyCustomView(Context context, ...) { 67049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * ... 68049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * mVirtualViewHelper = new MyVirtualViewHelper(this); 69049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * ViewCompat.setAccessibilityDelegate(this, mVirtualViewHelper); 70049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 71049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 72049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @Override 73049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean dispatchHoverEvent(MotionEvent event) { 74049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchHoverEvent(this, event) 75049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchHoverEvent(event); 76049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 77049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 78049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @Override 79049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean dispatchKeyEvent(KeyEvent event) { 80049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchKeyEvent(event) 81049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchKeyEvent(event); 82049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 83049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 84049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @Override 85049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean onFocusChanged(boolean gainFocus, int direction, 86049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Rect previouslyFocusedRect) { 87049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 88049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * mHelper.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 89049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 90049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 9112d8b3f36c7b503221185b44791822e59e690966Alan Viverette * mAccessHelper = new MyExploreByTouchHelper(someView); 926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * ViewCompat.setAccessibilityDelegate(someView, mAccessHelper); 936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverettepublic abstract class ExploreByTouchHelper extends AccessibilityDelegateCompat { 966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** Virtual node identifier value for invalid nodes. */ 976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public static final int INVALID_ID = Integer.MIN_VALUE; 986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9912d8b3f36c7b503221185b44791822e59e690966Alan Viverette /** Virtual node identifier value for the host view's node. */ 10012d8b3f36c7b503221185b44791822e59e690966Alan Viverette public static final int HOST_ID = View.NO_ID; 10112d8b3f36c7b503221185b44791822e59e690966Alan Viverette 1026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** Default class name used for virtual views. */ 103049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static final String DEFAULT_CLASS_NAME = "android.view.View"; 1046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Temporary, reusable data structures. 1066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final Rect mTempScreenRect = new Rect(); 1076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final Rect mTempParentRect = new Rect(); 1086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final Rect mTempVisibleRect = new Rect(); 1096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final int[] mTempGlobalRect = new int[2]; 1106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 111049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Cache of accessibility nodes. This is populated on-demand. */ 112049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private final SparseArray<AccessibilityNodeInfoCompat> mCachedNodes = new SparseArray<>(); 113049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** System accessibility manager, used to check state and send events. */ 1156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private final AccessibilityManager mManager; 1166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** View whose internal structure is exposed through this helper. */ 118049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private final View mHost; 1196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 120049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Virtual node provider used to expose logical structure to services. */ 121049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private MyNodeProvider mNodeProvider; 1226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 123049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that holds accessibility focus. */ 124049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private int mAccessibilityFocusedVirtualViewId = INVALID_ID; 1256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 126049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that holds keyboard focus. */ 127049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private int mKeyboardFocusedVirtualViewId = INVALID_ID; 128049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 129049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** Identifier for the virtual view that is currently hovered. */ 1306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private int mHoveredVirtualViewId = INVALID_ID; 1316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 133049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Constructs a new helper that can expose a virtual view hierarchy for the 134049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * specified host view. 1356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 136049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param host view whose virtual view hierarchy is exposed by this helper 1376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 138049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public ExploreByTouchHelper(View host) { 139049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (host == null) { 1406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new IllegalArgumentException("View may not be null"); 1416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 143049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost = host; 144049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 145049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final Context context = host.getContext(); 1466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mManager = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE); 147049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 148049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Host view must be focusable so that we can delegate to virtual 149049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // views. 150049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette host.setFocusable(true); 151049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (ViewCompat.getImportantForAccessibility(host) == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 152049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.setImportantForAccessibility(host, IMPORTANT_FOR_ACCESSIBILITY_YES); 153049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 1576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public AccessibilityNodeProviderCompat getAccessibilityNodeProvider(View host) { 1586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (mNodeProvider == null) { 159049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mNodeProvider = new MyNodeProvider(); 1606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return mNodeProvider; 1626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 165049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates hover events from the host view. 166049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 1676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Dispatches hover {@link MotionEvent}s to the virtual view hierarchy when 1686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * the Explore by Touch feature is enabled. 1696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 170049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 171049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#dispatchHoverEvent(MotionEvent)} method: 1726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre>@Override 1736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * public boolean dispatchHoverEvent(MotionEvent event) { 174049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchHoverEvent(this, event) 175049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchHoverEvent(event); 1766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * } 1776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 1786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 1796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param event The hover event to dispatch to the virtual view hierarchy. 1806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return Whether the hover event was handled. 1816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 182049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean dispatchHoverEvent(@NonNull MotionEvent event) { 1836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (!mManager.isEnabled() 1846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette || !AccessibilityManagerCompat.isTouchExplorationEnabled(mManager)) { 1856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 1866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 1886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (event.getAction()) { 1896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_MOVE: 1906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_ENTER: 1916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int virtualViewId = getVirtualViewAt(event.getX(), event.getY()); 1926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette updateHoveredVirtualView(virtualViewId); 1936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return (virtualViewId != INVALID_ID); 1946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case MotionEventCompat.ACTION_HOVER_EXIT: 195049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != INVALID_ID) { 1966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette updateHoveredVirtualView(INVALID_ID); 1976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return true; 1986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 1996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 2006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 2016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 2026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 2036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 2046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 2056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 206049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates key events from the host view. 207049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 208049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 209049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#dispatchKeyEvent(KeyEvent)} method: 210049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <pre>@Override 211049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean dispatchKeyEvent(KeyEvent event) { 212049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * return mHelper.dispatchKeyEvent(event) 213049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * || super.dispatchKeyEvent(event); 214049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 215049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * </pre> 216049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 217049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean dispatchKeyEvent(@NonNull KeyEvent event) { 218049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette boolean handled = false; 219049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 220049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int action = event.getAction(); 221049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (action != KeyEvent.ACTION_UP) { 222049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int keyCode = event.getKeyCode(); 223049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (keyCode) { 224049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_LEFT: 225049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_UP: 226049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_RIGHT: 227049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_DOWN: 228049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 229049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int direction = keyToDirection(keyCode); 230049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int count = 1 + event.getRepeatCount(); 231049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette for (int i = 0; i < count; i++) { 232049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (moveFocus(direction, null)) { 233049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = true; 234049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 235049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 236049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 237049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 238049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 239049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 240049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_CENTER: 241049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_ENTER: 242049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 243049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (event.getRepeatCount() == 0) { 244049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clickKeyboardFocusedVirtualView(); 245049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = true; 246049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 247049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 248049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 249049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_TAB: 250049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (KeyEventCompat.hasNoModifiers(event)) { 251049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = moveFocus(View.FOCUS_FORWARD, null); 252049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) { 253049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette handled = moveFocus(View.FOCUS_BACKWARD, null); 254049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 255049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 256049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 257049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 258049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 259049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return handled; 260049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 261049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 262049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 263049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Delegates focus changes from the host view. 264049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 265049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method should be called by overriding the host view's 266049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link View#onFocusChanged(boolean, int, Rect)} method: 267049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <pre>@Override 268049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * public boolean onFocusChanged(boolean gainFocus, int direction, 269049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Rect previouslyFocusedRect) { 270049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 271049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * mHelper.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 272049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * } 273049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * </pre> 274049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 275049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void onFocusChanged(boolean gainFocus, int direction, 276049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Nullable Rect previouslyFocusedRect) { 277049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 278049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearKeyboardFocusForVirtualView(mKeyboardFocusedVirtualViewId); 279049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 280049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 281049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (gainFocus) { 282049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette moveFocus(direction, previouslyFocusedRect); 283049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 284049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 285049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 286049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 287049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has accessibility focus 288049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has accessibility 289049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * focus 290049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 291049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final int getAccessibilityFocusedVirtualViewId() { 292049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mAccessibilityFocusedVirtualViewId; 293049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 294049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 295049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 296049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has keyboard focus 297049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has keyboard focus 298049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 299049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final int getKeyboardFocusedVirtualViewId() { 300049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mKeyboardFocusedVirtualViewId; 301049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 302049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 303049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 304049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Maps key event codes to focus directions. 305049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 306049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param keyCode the key event code 307049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the corresponding focus direction 308049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 309049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @FocusRealDirection 310049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static int keyToDirection(int keyCode) { 311049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (keyCode) { 312049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_LEFT: 313049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_LEFT; 314049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_UP: 315049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_UP; 316049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case KeyEvent.KEYCODE_DPAD_RIGHT: 317049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_RIGHT; 318049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 319049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return View.FOCUS_DOWN; 320049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 321049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 322049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 323049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 324049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains the bounds for the specified virtual view. 325049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 326049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view 327049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param outBounds the rect to populate with virtual view bounds 328049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 329049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private void getBoundsInParent(int virtualViewId, Rect outBounds) { 330049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node = obtainAccessibilityNodeInfo(virtualViewId); 331049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.getBoundsInParent(outBounds); 332049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 333049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 334049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 335049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Adapts AccessibilityNodeInfoCompat for obtaining bounds. 336049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 337049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static final FocusStrategy.BoundsAdapter<AccessibilityNodeInfoCompat> NODE_ADAPTER = 338049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette new FocusStrategy.BoundsAdapter<AccessibilityNodeInfoCompat>() { 339049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 340049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public void obtainBounds(AccessibilityNodeInfoCompat node, Rect outBounds) { 341049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.getBoundsInParent(outBounds); 342049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 343049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette }; 344049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 345049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 346049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Adapts SparseArray for iterating through values. 347049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 348049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static final FocusStrategy.CollectionAdapter<SparseArray<AccessibilityNodeInfoCompat>, AccessibilityNodeInfoCompat> SPARSE_VALUES_ADAPTER = 349049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette new FocusStrategy.CollectionAdapter<SparseArray<AccessibilityNodeInfoCompat>, AccessibilityNodeInfoCompat>() { 350049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 351049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public AccessibilityNodeInfoCompat get( 352049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette SparseArray<AccessibilityNodeInfoCompat> collection, int index) { 353049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return collection.valueAt(index); 354049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 355049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 356049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Override 357049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public int size(SparseArray<AccessibilityNodeInfoCompat> collection) { 358049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return collection.size(); 359049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 360049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette }; 361049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 362049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 363049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to move keyboard focus in the specified direction. 364049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 365049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param direction the direction in which to move keyboard focus 366049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param previouslyFocusedRect the bounds of the previously focused item, 367049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@code null} if not available 368049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if keyboard focus moved to a virtual view managed 369049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * by this helper, or {@code false} otherwise 370049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 371049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private boolean moveFocus(@FocusDirection int direction, @Nullable Rect previouslyFocusedRect) { 372049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int focusedNodeId = mKeyboardFocusedVirtualViewId; 373049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat focusedNode = 374049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette focusedNodeId == INVALID_ID ? null : mCachedNodes.get(focusedNodeId); 375049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 376049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat nextFocusedNode; 377049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (direction) { 378049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_FORWARD: 379049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_BACKWARD: 380049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final boolean isLayoutRtl = 381049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.getLayoutDirection(mHost) == ViewCompat.LAYOUT_DIRECTION_RTL; 382049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNode = FocusStrategy.findNextFocusInRelativeDirection(mCachedNodes, 383049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette SPARSE_VALUES_ADAPTER, NODE_ADAPTER, focusedNode, direction, isLayoutRtl, 384049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette false); 385049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 386049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_LEFT: 387049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_UP: 388049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_RIGHT: 389049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_DOWN: 390049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final Rect selectedRect = new Rect(); 391049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 392049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from a virtual view within the host. 393049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette getBoundsInParent(mKeyboardFocusedVirtualViewId, selectedRect); 394049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (previouslyFocusedRect != null) { 395049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from a real view outside the host. 396049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette selectedRect.set(previouslyFocusedRect); 397049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 398049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Focus is moving from... somewhere? Make a guess. 399049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Usually this happens when another view was too lazy 400049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // to pass the previously focused rect (ex. ScrollView 401049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // when moving UP or DOWN). 402049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette guessPreviouslyFocusedRect(mHost, direction, selectedRect); 403049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 404049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNode = FocusStrategy.findNextFocusInAbsoluteDirection(mCachedNodes, 405049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette SPARSE_VALUES_ADAPTER, NODE_ADAPTER, focusedNode, selectedRect, direction); 406049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 407049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 408049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette throw new IllegalArgumentException("direction must be one of " 409049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "{FOCUS_FORWARD, FOCUS_BACKWARD, FOCUS_UP, FOCUS_DOWN, " 410049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "FOCUS_LEFT, FOCUS_RIGHT}."); 411049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 412049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 413049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int nextFocusedNodeId; 414049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (nextFocusedNode == null) { 415049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNodeId = INVALID_ID; 416049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 417049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int index = mCachedNodes.indexOfValue(nextFocusedNode); 418049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette nextFocusedNodeId = mCachedNodes.keyAt(index); 419049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 420049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 421049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return requestKeyboardFocusForVirtualView(nextFocusedNodeId); 422049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 423049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 424049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 425049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains a best guess for the previously focused rect for keyboard focus 426049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * moving in the specified direction. 427049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 428049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param host the view into which focus is moving 429049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param direction the absolute direction in which focus is moving 430049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param outBounds the rect to populate with the best-guess bounds for the 431049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * previous focus rect 432049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 433049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private static Rect guessPreviouslyFocusedRect(@NonNull View host, 434049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @FocusRealDirection int direction, @NonNull Rect outBounds) { 435049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int w = host.getWidth(); 436049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int h = host.getHeight(); 437049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 438049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette switch (direction) { 439049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_LEFT: 440049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(w, 0, w, h); 441049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 442049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_UP: 443049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(0, h, w, h); 444049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 445049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_RIGHT: 446049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(-1, 0, -1, h); 447049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 448049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case View.FOCUS_DOWN: 449049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette outBounds.set(0, -1, w, -1); 450049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette break; 451049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette default: 452049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette throw new IllegalArgumentException("direction must be one of " 453049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette + "{FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT}."); 454049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 455049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 456049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return outBounds; 457049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 458049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 459049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 460049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Performs a click action on the keyboard focused virtual view, if any. 461049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 462049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if the click action was performed successfully or 463049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@code false} otherwise 464049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 465049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private boolean clickKeyboardFocusedVirtualView() { 466049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return mKeyboardFocusedVirtualViewId != INVALID_ID && onPerformActionForVirtualView( 467049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId, AccessibilityNodeInfoCompat.ACTION_CLICK, null); 468049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 469049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 470049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 4716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an event of the specified type with information about an item 4726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and attempts to send it up through the view hierarchy. 4736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 4746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * You should call this method after performing a user action that normally 4756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * fires an accessibility event, such as clicking on an item. 476049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 4776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <pre>public void performItemClick(T item) { 4786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * ... 4796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * sendEventForVirtualViewId(item.id, AccessibilityEvent.TYPE_VIEW_CLICKED); 4806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * } 4816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </pre> 4826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 483049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view for which to 484049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * send an event 485049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to send 486049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return {@code true} if the event was sent successfully, {@code false} 487049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * otherwise 4886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 489049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean sendEventForVirtualView(int virtualViewId, int eventType) { 4906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((virtualViewId == INVALID_ID) || !mManager.isEnabled()) { 4916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 4926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 4936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 494049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ViewParent parent = mHost.getParent(); 4956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (parent == null) { 4966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 4976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 4986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 4996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = createEvent(virtualViewId, eventType); 500049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return ViewParentCompat.requestSendAccessibilityEvent(parent, mHost, event); 5016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 5046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Notifies the accessibility framework that the properties of the parent 5056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * view have changed. 5066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 507049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after adding or removing 508049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * items from the parent view. 5096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 510049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateRoot() { 511722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette invalidateVirtualView(HOST_ID, AccessibilityEventCompat.CONTENT_CHANGE_TYPE_SUBTREE); 5126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 5156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Notifies the accessibility framework that the properties of a particular 5166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * item have changed. 5176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 518049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after changing any of the 519049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * properties set in 520049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 5216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 522049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id to invalidate, or 523049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #HOST_ID} to invalidate the root view 524722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * @see #invalidateVirtualView(int, int) 5256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 526049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateVirtualView(int virtualViewId) { 527722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette invalidateVirtualView(virtualViewId, 528722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.CONTENT_CHANGE_TYPE_UNDEFINED); 529722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 530722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette 531722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette /** 532722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * Notifies the accessibility framework that the properties of a particular 533722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * item have changed. 534722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <p> 535049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * You <strong>must</strong> call this method after changing any of the 536049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * properties set in 537049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 538722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * 539049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id to invalidate, or 540049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #HOST_ID} to invalidate the root view 541049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param changeTypes the bit mask of change types. May be {@code 0} for the 542722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * default (undefined) change type or one or more of: 543722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <ul> 544722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION} 545722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_SUBTREE} 546722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_TEXT} 547722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * <li>{@link AccessibilityEventCompat#CONTENT_CHANGE_TYPE_UNDEFINED} 548722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette * </ul> 549722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette */ 550049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final void invalidateVirtualView(int virtualViewId, int changeTypes) { 5517c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette final SparseArray<AccessibilityNodeInfoCompat> cachedNodes = mCachedNodes; 552049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (virtualViewId == HOST_ID 553049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette && (changeTypes & AccessibilityEventCompat.CONTENT_CHANGE_TYPE_SUBTREE) != 0) { 5547c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette for (int i = 0, count = cachedNodes.size(); i < count; i++) { 5557c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette final AccessibilityNodeInfoCompat node = cachedNodes.valueAt(i); 5567c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette if (node != null) { 5577c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette node.recycle(); 5587c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette } 5597c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette } 5607c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette cachedNodes.clear(); 561049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 5627c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette final AccessibilityNodeInfoCompat node = cachedNodes.removeReturnOld(virtualViewId); 5637c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette if (node != null) { 5647c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette node.recycle(); 5657c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette } 566049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 567049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 568722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette if (virtualViewId != INVALID_ID && mManager.isEnabled()) { 569049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ViewParent parent = mHost.getParent(); 570722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette if (parent != null) { 571049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Send events up the hierarchy so they can be coalesced. 572722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette final AccessibilityEvent event = createEvent(virtualViewId, 573722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.TYPE_WINDOW_CONTENT_CHANGED); 574722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette AccessibilityEventCompat.setContentChangeTypes(event, changeTypes); 575049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewParentCompat.requestSendAccessibilityEvent(parent, mHost, event); 576722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 577722514df962c62eee53f82df927b8969bc5ceb95Alan Viverette } 5786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 5796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 5806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 581049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Returns the virtual view ID for the currently accessibility focused 582049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * item. 583148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette * 584049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return the identifier of the virtual view that has accessibility focus 585049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * or {@link #INVALID_ID} if no virtual view has accessibility 586049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * focus 587049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @deprecated Use {@link #getAccessibilityFocusedVirtualViewId()}. 588148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette */ 589049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @Deprecated 590148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette public int getFocusedVirtualView() { 591049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return getAccessibilityFocusedVirtualViewId(); 592049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 593049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 594049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 595049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Called when the focus state of a virtual view changes. 596049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 597049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view identifier 598049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param hasFocus {@code true} if the view has focus, {@code false} 599049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * otherwise 600049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 601049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette protected void onVirtualViewKeyboardFocusChanged(int virtualViewId, boolean hasFocus) { 602049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Stub method. 603148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette } 604148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette 605148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette /** 6066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Sets the currently hovered item, sending hover accessibility events as 6076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * necessary to maintain the correct state. 6086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 609049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item currently being 610049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * hovered, or {@link #INVALID_ID} if no item is 611049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * hovered within the parent view 6126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private void updateHoveredVirtualView(int virtualViewId) { 6146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (mHoveredVirtualViewId == virtualViewId) { 6156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return; 6166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int previousVirtualViewId = mHoveredVirtualViewId; 6196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mHoveredVirtualViewId = virtualViewId; 6206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Stay consistent with framework behavior by sending ENTER/EXIT pairs 6226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // in reverse order. This is accurate as of API 18. 6236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEventCompat.TYPE_VIEW_HOVER_ENTER); 6246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView( 6256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette previousVirtualViewId, AccessibilityEventCompat.TYPE_VIEW_HOVER_EXIT); 6266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} for the specified 63012d8b3f36c7b503221185b44791822e59e690966Alan Viverette * virtual view id, which includes the host view ({@link #HOST_ID}). 6316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 632049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item for which to 633049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct an event 634049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 635049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 636049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEvent(int virtualViewId, int eventType) { 6396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (virtualViewId) { 64012d8b3f36c7b503221185b44791822e59e690966Alan Viverette case HOST_ID: 6416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return createEventForHost(eventType); 6426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 6436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return createEventForChild(virtualViewId, eventType); 6446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} for the host node. 6496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 650049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 651049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 652049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEventForHost(int eventType) { 6556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 656049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.onInitializeAccessibilityEvent(mHost, event); 657fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette 658fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette // Allow the client to populate the event. 659fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette onPopulateEventForHost(event); 660fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette 6616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return event; 6626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 6656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityEvent} populated with 6666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * information about the specified item. 6676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 668049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for the item for which to 669049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct an event 670049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param eventType the type of event to construct 671049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityEvent} populated with information about 672049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the specified item 6736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 6746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityEvent createEventForChild(int virtualViewId, int eventType) { 6756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 676049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event); 677049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node = obtainAccessibilityNodeInfo(virtualViewId); 678049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 679049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Allow the client to override these properties, 680049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.getText().add(node.getText()); 681049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setContentDescription(node.getContentDescription()); 682049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setScrollable(node.isScrollable()); 683049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setPassword(node.isPassword()); 684049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setEnabled(node.isEnabled()); 685049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setChecked(node.isChecked()); 6866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Allow the client to populate the event. 6886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette onPopulateEventForVirtualView(virtualViewId, event); 6896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Make sure the developer is following the rules. 6916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (event.getText().isEmpty() && (event.getContentDescription() == null)) { 6926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must add text or a content description in " 6936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateEventForVirtualViewId()"); 6946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 6956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 6966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Don't allow the client to override these properties. 697049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setClassName(node.getClassName()); 698049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette record.setSource(mHost, virtualViewId); 699049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette event.setPackageName(mHost.getContext().getPackageName()); 7006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return event; 7026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 705049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Obtains a populated {@link AccessibilityNodeInfoCompat} for the 706049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * virtual view with the specified identifier. 707049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <p> 708049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * This method may be called with identifier {@link #HOST_ID} to obtain a 709049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * node for the host view. 7106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 711049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view for which to 712049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * construct a node 713049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} populated with information 714049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * about the specified item 7156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 716049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette @NonNull 717049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private AccessibilityNodeInfoCompat obtainAccessibilityNodeInfo(int virtualViewId) { 718049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node; 719049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final int cacheIndex = mCachedNodes.indexOfKey(virtualViewId); 720049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (cacheIndex >= 0) { 721049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node = mCachedNodes.valueAt(cacheIndex); 722049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (virtualViewId == HOST_ID) { 723049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node = createNodeForHost(); 724049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else { 725049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node = createNodeForChild(virtualViewId); 7266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 727049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 728049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mCachedNodes.put(virtualViewId, node); 729049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 730049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return node; 7316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 7346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the 7356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * host view populated with its virtual descendants. 7366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 737049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} for the parent node 7386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 7396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityNodeInfoCompat createNodeForHost() { 740049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final AccessibilityNodeInfoCompat node = AccessibilityNodeInfoCompat.obtain(mHost); 741049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewCompat.onInitializeAccessibilityNodeInfo(mHost, node); 742fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette final int realNodeCount = node.getChildCount(); 7436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 74412d8b3f36c7b503221185b44791822e59e690966Alan Viverette // Allow the client to populate the host node. 74512d8b3f36c7b503221185b44791822e59e690966Alan Viverette onPopulateNodeForHost(node); 74612d8b3f36c7b503221185b44791822e59e690966Alan Viverette 7476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Add the virtual descendants. 748049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final ArrayList<Integer> virtualViewIds = new ArrayList<>(); 7496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette getVisibleVirtualViews(virtualViewIds); 750fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette if (realNodeCount > 0 && virtualViewIds.size() > 0) { 751fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette throw new RuntimeException("Views cannot have both real and virtual children"); 752fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette } 7536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 754049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette for (int i = 0, count = virtualViewIds.size(); i < count; i++) { 755049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.addChild(mHost, virtualViewIds.get(i)); 7566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return node; 7596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 7606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 7626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the 7636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * specified item. Automatically manages accessibility focus actions. 7646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 7656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Allows the implementing class to specify most node properties, but 7666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * overrides the following: 7676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 7686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setPackageName} 7696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setClassName} 7706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setParent(View)} 7716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setSource(View, int)} 7726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser} 7736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)} 7746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 7756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 7766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Uses the bounds of the parent view and the parent-relative bounding 7776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * rectangle specified by 7786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#getBoundsInParent} to automatically 7796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * update the following properties: 7806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 7816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser} 7826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>{@link AccessibilityNodeInfoCompat#setBoundsInParent} 7836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 7846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 785049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the virtual view id for item for which to construct 786049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * a node 787049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return an {@link AccessibilityNodeInfoCompat} for the specified item 7886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 7896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private AccessibilityNodeInfoCompat createNodeForChild(int virtualViewId) { 7906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final AccessibilityNodeInfoCompat node = AccessibilityNodeInfoCompat.obtain(); 7916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Ensure the client has good defaults. 7936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setEnabled(true); 794049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setFocusable(true); 7956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setClassName(DEFAULT_CLASS_NAME); 7966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 7976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Allow the client to populate the node. 7986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette onPopulateNodeForVirtualView(virtualViewId, node); 7996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Make sure the developer is following the rules. 8016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((node.getText() == null) && (node.getContentDescription() == null)) { 8026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must add text or a content description in " 8036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.getBoundsInParent(mTempParentRect); 8076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (mTempParentRect.isEmpty()) { 8086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must set parent bounds in " 8096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int actions = node.getActions(); 8136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((actions & AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS) != 0) { 8146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must not add ACTION_ACCESSIBILITY_FOCUS in " 8156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((actions & AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS) != 0) { 8186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette throw new RuntimeException("Callbacks must not add ACTION_CLEAR_ACCESSIBILITY_FOCUS in " 8196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette + "populateNodeForVirtualViewId()"); 8206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Don't allow the client to override these properties. 823049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setPackageName(mHost.getContext().getPackageName()); 824049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setSource(mHost, virtualViewId); 825049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setParent(mHost); 8266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Manage internal accessibility focus state. 828049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId == virtualViewId) { 8296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setAccessibilityFocused(true); 8306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 8316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } else { 8326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setAccessibilityFocused(false); 8336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS); 8346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 836049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Manage internal keyboard focus state. 837049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette final boolean isFocused = mKeyboardFocusedVirtualViewId == virtualViewId; 838049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (isFocused) { 839049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_FOCUS); 840049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } else if (node.isFocusable()) { 841049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.addAction(AccessibilityNodeInfoCompat.ACTION_FOCUS); 842049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 843049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette node.setFocused(isFocused); 844049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 8456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Set the visibility based on the parent bound. 8466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (intersectVisibleToUser(mTempParentRect)) { 8476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setVisibleToUser(true); 8486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setBoundsInParent(mTempParentRect); 8496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Calculate screen-relative bound. 852049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.getLocationOnScreen(mTempGlobalRect); 8536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int offsetX = mTempGlobalRect[0]; 8546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final int offsetY = mTempGlobalRect[1]; 8556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mTempScreenRect.set(mTempParentRect); 8566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette mTempScreenRect.offset(offsetX, offsetY); 8576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette node.setBoundsInScreen(mTempScreenRect); 8586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return node; 8606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performAction(int virtualViewId, int action, Bundle arguments) { 8636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (virtualViewId) { 86412d8b3f36c7b503221185b44791822e59e690966Alan Viverette case HOST_ID: 8656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return performActionForHost(action, arguments); 8666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 8676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return performActionForChild(virtualViewId, action, arguments); 8686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performActionForHost(int action, Bundle arguments) { 872049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return ViewCompat.performAccessibilityAction(mHost, action, arguments); 8736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean performActionForChild(int virtualViewId, int action, Bundle arguments) { 8766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette switch (action) { 8776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS: 878148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return requestAccessibilityFocus(virtualViewId); 8796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette case AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS: 880148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return clearAccessibilityFocus(virtualViewId); 881049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case AccessibilityNodeInfoCompat.ACTION_FOCUS: 882049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return requestKeyboardFocusForVirtualView(virtualViewId); 883049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette case AccessibilityNodeInfoCompat.ACTION_CLEAR_FOCUS: 884049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return clearKeyboardFocusForVirtualView(virtualViewId); 8856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette default: 886049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return onPerformActionForVirtualView(virtualViewId, action, arguments); 8876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 8896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 8906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 8916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Computes whether the specified {@link Rect} intersects with the visible 8926eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * portion of its parent {@link View}. Modifies {@code localRect} to contain 8936eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * only the visible portion. 8946eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 895049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param localRect a rectangle in local (parent) coordinates 896049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether the specified {@link Rect} is visible on the screen 8976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 8986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean intersectVisibleToUser(Rect localRect) { 8996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Missing or empty bounds mean this view is not visible. 9006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((localRect == null) || localRect.isEmpty()) { 9016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Attached to invisible window means this view is not visible. 905049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mHost.getWindowVisibility() != View.VISIBLE) { 9066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // An invisible predecessor means that this view is not visible. 910049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette ViewParent viewParent = mHost.getParent(); 9116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette while (viewParent instanceof View) { 9126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette final View view = (View) viewParent; 9136eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if ((ViewCompat.getAlpha(view) <= 0) || (view.getVisibility() != View.VISIBLE)) { 9146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9156eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette viewParent = view.getParent(); 9176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9196eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // A null parent implies the view is not visible. 9206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (viewParent == null) { 9216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // If no portion of the parent is visible, this view is not visible. 925049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (!mHost.getLocalVisibleRect(mTempVisibleRect)) { 9266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // Check if the view intersects the visible portion of the parent. 9306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return localRect.intersect(mTempVisibleRect); 9316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 9346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Attempts to give accessibility focus to a virtual view. 9356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 9366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * A virtual view will not actually take focus if 9376eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityManager#isEnabled()} returns false, 9386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityManager#isTouchExplorationEnabled()} returns false, 9396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * or the view already has accessibility focus. 9406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 941049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view on which to 942049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * place accessibility focus 943049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually took accessibility focus 9446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 9456eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette private boolean requestAccessibilityFocus(int virtualViewId) { 9466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette if (!mManager.isEnabled() 9476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette || !AccessibilityManagerCompat.isTouchExplorationEnabled(mManager)) { 9486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // TODO: Check virtual view visibility. 951049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != virtualViewId) { 952f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette // Clear focus from the previously focused view, if applicable. 953049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId != INVALID_ID) { 954049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearAccessibilityFocus(mAccessibilityFocusedVirtualViewId); 955f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette } 956f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette 957f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette // Set focus on the new view. 958049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mAccessibilityFocusedVirtualViewId = virtualViewId; 959f6a201aaad218a0ee66a9479b16b012a3fd108eaAlan Viverette 9606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette // TODO: Only invalidate virtual view bounds. 961049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.invalidate(); 9626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, 9636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette AccessibilityEventCompat.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 9646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return true; 9656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return false; 9676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 9706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Attempts to clear accessibility focus from a virtual view. 971148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette * 972049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view from which to 973049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * clear accessibility focus 974049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually cleared accessibility focus 9756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 976148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette private boolean clearAccessibilityFocus(int virtualViewId) { 977049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mAccessibilityFocusedVirtualViewId == virtualViewId) { 978049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mAccessibilityFocusedVirtualViewId = INVALID_ID; 979049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mHost.invalidate(); 9806eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette sendEventForVirtualView(virtualViewId, 9816eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette AccessibilityEventCompat.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 982148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return true; 9836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 984148d85f65c0f01be809032d2140c7df6d7275504Alan Viverette return false; 9856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 9866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 9876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 988049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to give keyboard focus to a virtual view. 989049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 990049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view on which to 991049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * place keyboard focus 992049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually took keyboard focus 993049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 994049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean requestKeyboardFocusForVirtualView(int virtualViewId) { 995049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (!mHost.isFocused() && !mHost.requestFocus()) { 996049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Host must have real keyboard focus. 997049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 998049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 999049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1000049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId == virtualViewId) { 1001049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // The virtual view already has focus. 1002049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1003049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1004049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1005049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != INVALID_ID) { 1006049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette clearKeyboardFocusForVirtualView(mKeyboardFocusedVirtualViewId); 1007049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1008049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1009049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId = virtualViewId; 1010049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1011049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette onVirtualViewKeyboardFocusChanged(virtualViewId, true); 1012049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEvent.TYPE_VIEW_FOCUSED); 1013049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1014049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return true; 1015049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1016049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1017049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 1018049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Attempts to clear keyboard focus from a virtual view. 1019049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * 1020049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @param virtualViewId the identifier of the virtual view from which to 1021049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * clear keyboard focus 1022049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * @return whether this virtual view actually cleared keyboard focus 1023049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette */ 1024049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette public final boolean clearKeyboardFocusForVirtualView(int virtualViewId) { 1025049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette if (mKeyboardFocusedVirtualViewId != virtualViewId) { 1026049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // The virtual view is not focused. 1027049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return false; 1028049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1029049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1030049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette mKeyboardFocusedVirtualViewId = INVALID_ID; 1031049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1032049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette onVirtualViewKeyboardFocusChanged(virtualViewId, false); 1033049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette sendEventForVirtualView(virtualViewId, AccessibilityEvent.TYPE_VIEW_FOCUSED); 1034049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1035049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette return true; 1036049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 1037049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette 1038049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette /** 10396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Provides a mapping between view-relative coordinates and logical 10406eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * items. 10416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param x The view-relative x coordinate 10436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param y The view-relative y coordinate 10446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return virtual view identifier for the logical item under 104512d8b3f36c7b503221185b44791822e59e690966Alan Viverette * coordinates (x,y) or {@link #HOST_ID} if there is no item at 1046cd9978cdf0c3852189fb881846db6569d43f5598Alan Viverette * the given coordinates 10476eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 10486eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract int getVirtualViewAt(float x, float y); 10496eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 10516eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates a list with the view's visible items. The ordering of items 10526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * within {@code virtualViewIds} specifies order of accessibility focus 10536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * traversal. 10546eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10556eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewIds The list to populate with visible items 10566eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 10576eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract void getVisibleVirtualViews(List<Integer> virtualViewIds); 10586eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 10606eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an {@link AccessibilityEvent} with information about the 10616eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * specified item. 10626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1063049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * The helper class automatically populates the following fields based on 1064049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * the values set by 1065049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}, 1066049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * but implementations may optionally override them: 10676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1068049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>event text, see {@link AccessibilityEvent#getText()} 1069049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>content description, see 1070049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityEvent#setContentDescription(CharSequence)} 1071049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>scrollability, see {@link AccessibilityEvent#setScrollable(boolean)} 1072049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>password state, see {@link AccessibilityEvent#setPassword(boolean)} 1073049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>enabled state, see {@link AccessibilityEvent#setEnabled(boolean)} 1074049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>checked state, see {@link AccessibilityEvent#setChecked(boolean)} 10756eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 10766eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 10776eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The following required fields are automatically populated by the 10786eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * helper class and may not be overridden: 10796eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1080049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>item class name, set to the value used in 1081049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)} 10826eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>package name, set to the package of the host view's 10836eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link Context}, see {@link AccessibilityEvent#setPackageName} 10846eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>event source, set to the host view and virtual view identifier, 10856eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * see {@link AccessibilityRecordCompat#setSource(View, int)} 10866eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 10876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 10886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view id for the item for which to 10896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * populate the event 10906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param event The event to populate 10916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 1092049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) { 1093049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette // Default implementation is no-op. 1094049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette } 10956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 10966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 1097fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * Populates an {@link AccessibilityEvent} with information about the host 1098fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * view. 1099fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * <p> 1100fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * The default implementation is a no-op. 1101fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * 1102fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * @param event the event to populate with information about the host view 1103fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette */ 1104fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette protected void onPopulateEventForHost(AccessibilityEvent event) { 1105fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette // Default implementation is no-op. 1106fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette } 1107fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette 1108fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette /** 11096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Populates an {@link AccessibilityNodeInfoCompat} with information 11106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * about the specified item. 11116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1112049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Implementations <strong>must</strong> populate the following required 1113049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * fields: 11146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1115049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>event text, see 1116049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setText(CharSequence)} or 1117049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setContentDescription(CharSequence)} 11186eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>bounds in parent coordinates, see 1119049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setBoundsInParent(Rect)} 11206eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11216eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11226eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class automatically populates the following fields with 11236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * default values, but implementations may optionally override them: 11246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 1125049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>enabled state, set to {@code true}, see 1126049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setEnabled(boolean)} 1127049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>keyboard focusability, set to {@code true}, see 1128049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setFocusable(boolean)} 1129049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>item class name, set to {@code android.view.View}, see 1130049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setClassName(CharSequence)} 11316eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11326eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11336eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The following required fields are automatically populated by the 11346eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * helper class and may not be overridden: 11356eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <ul> 11366eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>package name, identical to the package name set by 1137049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateEventForVirtualView(int, AccessibilityEvent)}, see 11386eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setPackageName} 11396eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>node source, identical to the event source set in 1140049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateEventForVirtualView(int, AccessibilityEvent)}, see 11416eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setSource(View, int)} 11426eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>parent view, set to the host view, see 11436eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#setParent(View)} 11446eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>visibility, computed based on parent-relative bounds, see 1145049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setVisibleToUser(boolean)} 11466eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>accessibility focus, computed based on internal helper state, see 1147049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setAccessibilityFocused(boolean)} 1148049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * <li>keyboard focus, computed based on internal helper state, see 1149049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#setFocused(boolean)} 11506eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <li>bounds in screen coordinates, computed based on host view bounds, 1151049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * see {@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)} 11526eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * </ul> 11536eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1154049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Additionally, the helper class automatically handles keyboard focus and 1155049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * accessibility focus management by adding the appropriate 1156049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_FOCUS}, 1157049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_FOCUS}, 1158049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_ACCESSIBILITY_FOCUS}, or 11596eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_ACCESSIBILITY_FOCUS} 1160049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * actions. Implementations must <strong>never</strong> manually add these 1161049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * actions. 11626eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11636eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class also automatically modifies parent- and 11646eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * screen-relative bounds to reflect the portion of the item visible 11656eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * within its parent. 11666eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 11676eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view identifier of the item for 11686eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * which to populate the node 11696eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param node The node to populate 11706eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 11716eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract void onPopulateNodeForVirtualView( 11726eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette int virtualViewId, AccessibilityNodeInfoCompat node); 11736eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 11746eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 117512d8b3f36c7b503221185b44791822e59e690966Alan Viverette * Populates an {@link AccessibilityNodeInfoCompat} with information 117612d8b3f36c7b503221185b44791822e59e690966Alan Viverette * about the host view. 117712d8b3f36c7b503221185b44791822e59e690966Alan Viverette * <p> 1178fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * The default implementation is a no-op. 1179fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * 1180fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette * @param node the node to populate with information about the host view 118112d8b3f36c7b503221185b44791822e59e690966Alan Viverette */ 1182fe107ccc9e0ee09fbf7bcb9d17cee970b10ee0cfAlan Viverette protected void onPopulateNodeForHost(AccessibilityNodeInfoCompat node) { 118312d8b3f36c7b503221185b44791822e59e690966Alan Viverette // Default implementation is no-op. 118412d8b3f36c7b503221185b44791822e59e690966Alan Viverette } 118512d8b3f36c7b503221185b44791822e59e690966Alan Viverette 118612d8b3f36c7b503221185b44791822e59e690966Alan Viverette /** 11876eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * Performs the specified accessibility action on the item associated 11886eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * with the virtual view identifier. See 11896eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#performAction(int, Bundle)} for 11906eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * more information. 11916eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 1192049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Implementations <strong>must</strong> handle any actions added manually 1193049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * in 1194049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * {@link #onPopulateNodeForVirtualView(int, AccessibilityNodeInfoCompat)}. 11956eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * <p> 11966eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * The helper class automatically handles focus management resulting 11976eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * from {@link AccessibilityNodeInfoCompat#ACTION_ACCESSIBILITY_FOCUS} 11986eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * and 11996eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * {@link AccessibilityNodeInfoCompat#ACTION_CLEAR_ACCESSIBILITY_FOCUS} 12006eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * actions. 12016eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * 12026eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param virtualViewId The virtual view identifier of the item on which 12036eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * to perform the action 12046eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param action The accessibility action to perform 12056eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @param arguments (Optional) A bundle with additional arguments, or 12066eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * null 12076eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette * @return true if the action was performed 12086eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 12096eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette protected abstract boolean onPerformActionForVirtualView( 12106eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette int virtualViewId, int action, Bundle arguments); 12116eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 12126eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette /** 1213049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette * Exposes a virtual view hierarchy to the accessibility framework. 12146eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette */ 1215049a692ac952be43d5fcd975ec6d394ca058c9d8Alan Viverette private class MyNodeProvider extends AccessibilityNodeProviderCompat { 12166eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 12176eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public AccessibilityNodeInfoCompat createAccessibilityNodeInfo(int virtualViewId) { 12187c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette // The caller takes ownership of the node and is expected to 12197c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette // recycle it when done, so always return a copy. 12207c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette final AccessibilityNodeInfoCompat node = 12217c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette ExploreByTouchHelper.this.obtainAccessibilityNodeInfo(virtualViewId); 12227c8264ea497e54aa1536c76e553b52d2207a50fbAlan Viverette return AccessibilityNodeInfoCompat.obtain(node); 12236eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12246eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette 12256eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette @Override 12266eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette public boolean performAction(int virtualViewId, int action, Bundle arguments) { 12276eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette return ExploreByTouchHelper.this.performAction(virtualViewId, action, arguments); 12286eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12296eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette } 12306eb3cdf42d5382aef6b6a6afd7c305dbc27885b9Alan Viverette} 1231