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| 1 /* | |
| 2 * Copyright (C) 2014, 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 | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
| 14 * its contributors may be used to endorse or promote products derived | |
| 15 * from this software without specific prior written permission. | |
| 16 * | |
| 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef AXObjectCacheImpl_h | |
| 30 #define AXObjectCacheImpl_h | |
| 31 | |
| 32 #include "core/accessibility/AXObject.h" | |
| 33 #include "core/accessibility/AXObjectCache.h" | |
| 34 #include "core/rendering/RenderText.h" | |
| 35 #include "platform/Timer.h" | |
| 36 #include "wtf/Forward.h" | |
| 37 #include "wtf/HashMap.h" | |
| 38 #include "wtf/HashSet.h" | |
| 39 #include "wtf/RefPtr.h" | |
| 40 | |
| 41 namespace blink { | |
| 42 | |
| 43 class AbstractInlineTextBox; | |
| 44 class HTMLAreaElement; | |
| 45 class FrameView; | |
| 46 class Widget; | |
| 47 | |
| 48 struct TextMarkerData { | |
| 49 AXID axID; | |
| 50 Node* node; | |
| 51 int offset; | |
| 52 EAffinity affinity; | |
| 53 }; | |
| 54 | |
| 55 // This class should only be used from inside the accessibility directory. | |
| 56 class AXObjectCacheImpl : public AXObjectCache { | |
| 57 WTF_MAKE_NONCOPYABLE(AXObjectCacheImpl); WTF_MAKE_FAST_ALLOCATED; | |
| 58 public: | |
| 59 explicit AXObjectCacheImpl(Document&); | |
| 60 ~AXObjectCacheImpl(); | |
| 61 | |
| 62 static AXObject* focusedUIElementForPage(const Page*); | |
| 63 | |
| 64 virtual AXObject* objectFromAXID(AXID id) const override { return m_objects.
get(id); } | |
| 65 | |
| 66 virtual AXObject* root() override; | |
| 67 virtual AXObject* getOrCreateAXObjectFromRenderView(RenderView*) override; | |
| 68 | |
| 69 virtual void selectionChanged(Node*) override; | |
| 70 virtual void childrenChanged(Node*) override; | |
| 71 virtual void childrenChanged(RenderObject*) override; | |
| 72 virtual void childrenChanged(Widget*) override; | |
| 73 virtual void checkedStateChanged(Node*) override; | |
| 74 virtual void selectedChildrenChanged(Node*) override; | |
| 75 | |
| 76 // will only return the AXObject if it already exists | |
| 77 virtual AXObject* get(Node*); | |
| 78 | |
| 79 virtual void remove(RenderObject*) override; | |
| 80 virtual void remove(Node*) override; | |
| 81 virtual void remove(Widget*) override; | |
| 82 virtual void remove(AbstractInlineTextBox*) override; | |
| 83 | |
| 84 virtual const Element* rootAXEditableElement(const Node*) override; | |
| 85 virtual bool nodeIsTextControl(const Node*) override; | |
| 86 | |
| 87 // Called by a node when text or a text equivalent (e.g. alt) attribute is c
hanged. | |
| 88 virtual void textChanged(Node*) override; | |
| 89 virtual void textChanged(RenderObject*) override; | |
| 90 // Called when a node has just been attached, so we can make sure we have th
e right subclass of AXObject. | |
| 91 virtual void updateCacheAfterNodeIsAttached(Node*) override; | |
| 92 | |
| 93 virtual void handleAttributeChanged(const QualifiedName& attrName, Element*)
override; | |
| 94 virtual void handleFocusedUIElementChanged(Node* oldFocusedNode, Node* newFo
cusedNode) override; | |
| 95 virtual void handleInitialFocus() override; | |
| 96 virtual void handleTextFormControlChanged(Node*) override; | |
| 97 virtual void handleEditableTextContentChanged(Node*) override; | |
| 98 virtual void handleValueChanged(Node*) override; | |
| 99 virtual void handleUpdateActiveMenuOption(RenderMenuList*, int optionIndex)
override; | |
| 100 virtual void handleLoadComplete(Document*) override; | |
| 101 virtual void handleLayoutComplete(Document*) override; | |
| 102 | |
| 103 virtual void setCanvasObjectBounds(Element*, const LayoutRect&) override; | |
| 104 | |
| 105 virtual void clearWeakMembers(Visitor*) override; | |
| 106 | |
| 107 virtual void inlineTextBoxesUpdated(RenderObject* renderer) override; | |
| 108 | |
| 109 // Called when the scroll offset changes. | |
| 110 virtual void handleScrollPositionChanged(FrameView*) override; | |
| 111 virtual void handleScrollPositionChanged(RenderObject*) override; | |
| 112 | |
| 113 // Called when scroll bars are added / removed (as the view resizes). | |
| 114 void handleScrollbarUpdate(FrameView*) override; | |
| 115 void handleLayoutComplete(RenderObject*) override; | |
| 116 void handleScrolledToAnchor(const Node* anchorNode) override; | |
| 117 | |
| 118 // Returns the root object for the entire document. | |
| 119 AXObject* rootObject(); | |
| 120 | |
| 121 // used for objects without backing elements | |
| 122 AXObject* getOrCreate(AccessibilityRole); | |
| 123 AXObject* getOrCreate(RenderObject*); | |
| 124 AXObject* getOrCreate(Widget*); | |
| 125 AXObject* getOrCreate(Node*); | |
| 126 AXObject* getOrCreate(AbstractInlineTextBox*); | |
| 127 | |
| 128 // will only return the AXObject if it already exists | |
| 129 AXObject* get(RenderObject*); | |
| 130 AXObject* get(Widget*); | |
| 131 AXObject* get(AbstractInlineTextBox*); | |
| 132 | |
| 133 void remove(AXID); | |
| 134 | |
| 135 void detachWrapper(AXObject*); | |
| 136 void attachWrapper(AXObject*); | |
| 137 void childrenChanged(AXObject*); | |
| 138 void selectedChildrenChanged(RenderObject*); | |
| 139 | |
| 140 void handleActiveDescendantChanged(Node*); | |
| 141 void handleAriaRoleChanged(Node*); | |
| 142 void handleAriaExpandedChange(Node*); | |
| 143 | |
| 144 void recomputeIsIgnored(RenderObject* renderer); | |
| 145 | |
| 146 bool accessibilityEnabled(); | |
| 147 bool inlineTextBoxAccessibilityEnabled(); | |
| 148 | |
| 149 void removeAXID(AXObject*); | |
| 150 bool isIDinUse(AXID id) const { return m_idsInUse.contains(id); } | |
| 151 | |
| 152 AXID platformGenerateAXID() const; | |
| 153 | |
| 154 bool nodeHasRole(Node*, const AtomicString& role); | |
| 155 | |
| 156 // Counts the number of times the document has been modified. Some attribute
values are cached | |
| 157 // as long as the modification count hasn't changed. | |
| 158 int modificationCount() const { return m_modificationCount; } | |
| 159 | |
| 160 void postNotification(RenderObject*, AXNotification, bool postToElement); | |
| 161 void postNotification(Node*, AXNotification, bool postToElement); | |
| 162 void postNotification(AXObject*, Document*, AXNotification, bool postToEleme
nt); | |
| 163 | |
| 164 protected: | |
| 165 void postPlatformNotification(AXObject*, AXNotification); | |
| 166 void textChanged(AXObject*); | |
| 167 void labelChanged(Element*); | |
| 168 | |
| 169 // This is a weak reference cache for knowing if Nodes used by TextMarkers a
re valid. | |
| 170 void setNodeInUse(Node* n) { m_textMarkerNodes.add(n); } | |
| 171 void removeNodeForUse(Node* n) { m_textMarkerNodes.remove(n); } | |
| 172 bool isNodeInUse(Node* n) { return m_textMarkerNodes.contains(n); } | |
| 173 | |
| 174 private: | |
| 175 Document& m_document; | |
| 176 HashMap<AXID, RefPtr<AXObject> > m_objects; | |
| 177 HashMap<RenderObject*, AXID> m_renderObjectMapping; | |
| 178 HashMap<Widget*, AXID> m_widgetObjectMapping; | |
| 179 HashMap<Node*, AXID> m_nodeObjectMapping; | |
| 180 HashMap<AbstractInlineTextBox*, AXID> m_inlineTextBoxObjectMapping; | |
| 181 HashSet<Node*> m_textMarkerNodes; | |
| 182 int m_modificationCount; | |
| 183 | |
| 184 HashSet<AXID> m_idsInUse; | |
| 185 | |
| 186 Timer<AXObjectCacheImpl> m_notificationPostTimer; | |
| 187 Vector<pair<RefPtr<AXObject>, AXNotification> > m_notificationsToPost; | |
| 188 void notificationPostTimerFired(Timer<AXObjectCacheImpl>*); | |
| 189 | |
| 190 static AXObject* focusedImageMapUIElement(HTMLAreaElement*); | |
| 191 | |
| 192 AXID getAXID(AXObject*); | |
| 193 | |
| 194 Settings* settings(); | |
| 195 }; | |
| 196 | |
| 197 // This is the only subclass of AXObjectCache. | |
| 198 DEFINE_TYPE_CASTS(AXObjectCacheImpl, AXObjectCache, cache, true, true); | |
| 199 | |
| 200 bool nodeHasRole(Node*, const String& role); | |
| 201 // This will let you know if aria-hidden was explicitly set to false. | |
| 202 bool isNodeAriaVisible(Node*); | |
| 203 | |
| 204 } | |
| 205 | |
| 206 #endif | |
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Chromium Code Reviews
Issue 713933002:
Create Source/modules/accessibility/ and move most of core/accessibility/* into it (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master