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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 #include "config.h" | |
32 #include "WebAccessibilityCacheImpl.h" | |
33 | |
34 #include "AccessibilityObject.h" | |
35 #include "AXObjectCache.h" | |
36 #include "Document.h" | |
37 #include "Frame.h" | |
38 | |
39 #include "WebAccessibilityObject.h" | |
40 #include "WebFrameImpl.h" | |
41 #include "WebViewImpl.h" | |
42 | |
43 using namespace WebCore; | |
44 | |
45 namespace WebKit { | |
46 | |
47 const int invalidObjectId = -1; | |
48 const int firstObjectId = 1000; | |
49 | |
50 static PassRefPtr<AccessibilityObject> toAccessibilityObject(const WebAccessibilityObject& object) | |
51 { | |
52 return object; | |
53 } | |
54 | |
55 // WebView ---------------------------------------------------------------- | |
56 | |
57 WebAccessibilityCache* WebAccessibilityCache::create() | |
58 { | |
59 return new WebAccessibilityCacheImpl(); | |
60 } | |
61 | |
62 // WeakHandle ------------------------------------------------------------- | |
63 | |
64 PassRefPtr<WebAccessibilityCacheImpl::WeakHandle> WebAccessibilityCacheImpl::WeakHandle::create(AccessibilityObject* object) | |
65 { | |
66 // FIXME: Remove resetting ref-count from AccessibilityObjectWrapper | |
67 // and convert to use adoptRef. | |
68 return new WebAccessibilityCacheImpl::WeakHandle(object); | |
69 } | |
70 | |
71 WebAccessibilityCacheImpl::WeakHandle::WeakHandle(AccessibilityObject* object) | |
72 : AccessibilityObjectWrapper(object) | |
73 { | |
74 m_object->setWrapper(this); | |
75 } | |
76 | |
77 // WebAccessibilityCacheImpl ---------------------------------------- | |
78 | |
79 void WebAccessibilityCacheImpl::WeakHandle::detach() | |
80 { | |
81 if (m_object) | |
82 m_object = 0; | |
83 } | |
84 | |
85 WebAccessibilityCacheImpl::WebAccessibilityCacheImpl() | |
86 : m_nextNewId(firstObjectId) | |
87 , m_initialized(false) | |
88 { | |
89 } | |
90 | |
91 WebAccessibilityCacheImpl::~WebAccessibilityCacheImpl() | |
92 { | |
93 } | |
94 | |
95 void WebAccessibilityCacheImpl::initialize(WebView* view) | |
96 { | |
97 AXObjectCache::enableAccessibility(); | |
98 WebAccessibilityObject root = view->accessibilityObject(); | |
99 if (root.isNull()) | |
100 return; | |
101 | |
102 RefPtr<AccessibilityObject> rootObject = toAccessibilityObject(root); | |
103 | |
104 // Insert root in hashmaps. | |
105 m_objectMap.set(m_nextNewId, WeakHandle::create(rootObject.get())); | |
106 m_idMap.set(rootObject.get(), m_nextNewId++); | |
107 | |
108 m_initialized = true; | |
109 } | |
110 | |
111 WebAccessibilityObject WebAccessibilityCacheImpl::getObjectById(int id) | |
112 { | |
113 ObjectMap::iterator it = m_objectMap.find(id); | |
114 | |
115 if (it == m_objectMap.end() || !it->second) | |
116 return WebAccessibilityObject(); | |
117 | |
118 return WebAccessibilityObject(it->second->accessibilityObject()); | |
119 } | |
120 | |
121 bool WebAccessibilityCacheImpl::isValidId(int id) const | |
122 { | |
123 return id >= firstObjectId; | |
124 } | |
125 | |
126 void WebAccessibilityCacheImpl::remove(int id) | |
127 { | |
128 ObjectMap::iterator it = m_objectMap.find(id); | |
129 | |
130 if (it == m_objectMap.end()) | |
131 return; | |
132 | |
133 if (it->second) { | |
134 // Erase element from reverse hashmap. | |
135 IdMap::iterator it2 = m_idMap.find(it->second->accessibilityObject()); | |
136 if (it2 != m_idMap.end()) | |
137 m_idMap.remove(it2); | |
138 } | |
139 | |
140 m_objectMap.remove(it); | |
141 } | |
142 | |
143 void WebAccessibilityCacheImpl::clear() | |
144 { | |
145 m_objectMap.clear(); | |
146 m_idMap.clear(); | |
147 } | |
148 | |
149 int WebAccessibilityCacheImpl::addOrGetId(const WebAccessibilityObject& object) | |
150 { | |
151 if (object.isNull()) | |
152 return invalidObjectId; | |
153 | |
154 RefPtr<AccessibilityObject> o = toAccessibilityObject(object); | |
155 | |
156 IdMap::iterator it = m_idMap.find(o.get()); | |
157 | |
158 if (it != m_idMap.end()) | |
159 return it->second; | |
160 | |
161 // Insert new accessibility object in hashmaps and return its newly | |
162 // assigned accessibility object id. | |
163 m_objectMap.set(m_nextNewId, WeakHandle::create(o.get())); | |
164 m_idMap.set(o.get(), m_nextNewId); | |
165 | |
166 return m_nextNewId++; | |
167 } | |
168 | |
169 } | |
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