1 /* 2 * Copyright (C) 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef WebAccessibilityCacheImpl_h 32 #define WebAccessibilityCacheImpl_h 33 34 #include "AccessibilityObjectWrapper.h" 35 #include "WebAccessibilityCache.h" 36 #include <wtf/HashMap.h> 37 #include <wtf/PassRefPtr.h> 38 39 namespace WebKit { 40 41 // FIXME: Should be eliminated to use AXObjectCache instead. 42 class WebAccessibilityCacheImpl : public WebKit::WebAccessibilityCache { 43 public: 44 virtual void initialize(WebView* view); isInitialized()45 virtual bool isInitialized() const { return m_initialized; } 46 47 virtual WebAccessibilityObject getObjectById(int); 48 virtual int addOrGetId(const WebKit::WebAccessibilityObject&); 49 virtual bool isCached(const WebAccessibilityObject&); 50 51 virtual void remove(int); 52 virtual void clear(); 53 54 protected: 55 friend class WebKit::WebAccessibilityCache; 56 57 WebAccessibilityCacheImpl(); 58 ~WebAccessibilityCacheImpl(); 59 60 private: 61 // FIXME: This can be just part of Chromium's AccessibilityObjectWrapper. 62 class WeakHandle : public WebCore::AccessibilityObjectWrapper { 63 public: 64 static PassRefPtr<WeakHandle> create(WebCore::AccessibilityObject*); 65 virtual void detach(); 66 private: 67 WeakHandle(WebCore::AccessibilityObject*); 68 }; 69 70 typedef HashMap<int, RefPtr<WeakHandle> > ObjectMap; 71 typedef HashMap<WebCore::AccessibilityObject*, int> IdMap; 72 73 // Hashmap for caching of elements in use by the AT, mapping id (int) to 74 // WebAccessibilityObject. 75 ObjectMap m_objectMap; 76 // Hashmap for caching of elements in use by the AT, mapping a 77 // AccessibilityObject pointer to its id (int). Needed for reverse lookup, 78 // to ensure unnecessary duplicate entries are not created in the 79 // ObjectMap and for focus changes in WebKit. 80 IdMap m_idMap; 81 82 // Unique identifier for retrieving an accessibility object from the page's 83 // hashmaps. Id is always 0 for the root of the accessibility object 84 // hierarchy (on a per-renderer process basis). 85 int m_nextNewId; 86 87 bool m_initialized; 88 }; 89 90 } 91 92 #endif 93