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3 * Copyright (C) 2012 Apple Inc. All Rights Reserved.
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30 #include "core/dom/DocumentOrderedMap.h"
31 #include "wtf/Forward.h"
32 #include "wtf/text/AtomicString.h"
40 class HTMLLabelElement;
43 class IdTargetObserverRegistry;
47 // A class which inherits both Node and TreeScope must call clearRareData() in its destructor
48 // so that the Node destructor no longer does problematic NodeList cache manipulation in
51 friend class Document;
52 friend class TreeScopeAdopter;
55 TreeScope* parentTreeScope() const { return m_parentTreeScope; }
56 void setParentTreeScope(TreeScope*);
58 Element* adjustedFocusedElement();
59 Element* getElementById(const AtomicString&) const;
60 bool hasElementWithId(StringImpl* id) const;
61 bool containsMultipleElementsWithId(const AtomicString& id) const;
62 void addElementById(const AtomicString& elementId, Element*);
63 void removeElementById(const AtomicString& elementId, Element*);
65 Document* documentScope() const { return m_documentScope; }
67 Node* ancestorInThisScope(Node*) const;
69 void addImageMap(HTMLMapElement*);
70 void removeImageMap(HTMLMapElement*);
71 HTMLMapElement* getImageMap(const String& url) const;
73 Element* elementFromPoint(int x, int y) const;
76 bool shouldCacheLabelsByForAttribute() const { return m_labelsByForAttribute; }
77 void addLabel(const AtomicString& forAttributeValue, HTMLLabelElement*);
78 void removeLabel(const AtomicString& forAttributeValue, HTMLLabelElement*);
79 HTMLLabelElement* labelElementForId(const AtomicString& forAttributeValue);
81 DOMSelection* getSelection() const;
83 // Find first anchor with the given name.
84 // First searches for an element with the given ID, but if that fails, then looks
85 // for an anchor with the given name. ID matching is always case sensitive, but
86 // Anchor name matching is case sensitive in strict mode and not case sensitive in
87 // quirks mode for historical compatibility reasons.
88 Element* findAnchor(const String& name);
90 bool applyAuthorStyles() const;
92 // Used by the basic DOM mutation methods (e.g., appendChild()).
93 void adoptIfNeeded(Node&);
95 Node* rootNode() const { return m_rootNode; }
97 IdTargetObserverRegistry& idTargetObserverRegistry() const { return *m_idTargetObserverRegistry.get(); }
99 static TreeScope* noDocumentInstance()
101 DEFINE_STATIC_LOCAL(TreeScope, instance, ());
105 // Nodes belonging to this scope hold guard references -
106 // these are enough to keep the scope from being destroyed, but
107 // not enough to keep it from removing its children. This allows a
108 // node that outlives its scope to still have a valid document
109 // pointer without introducing reference cycles.
112 ASSERT(!deletionHasBegun());
118 ASSERT(!deletionHasBegun());
120 if (!m_guardRefCount && !refCount() && this != noDocumentInstance() && !rootNodeHasTreeSharedParent()) {
126 void removedLastRefToScope();
128 bool isInclusiveAncestorOf(const TreeScope&) const;
129 unsigned short comparePosition(const TreeScope&) const;
131 Element* getElementByAccessKey(const String& key) const;
134 TreeScope(ContainerNode*, Document*);
135 TreeScope(Document*);
136 virtual ~TreeScope();
138 void destroyTreeScopeData();
139 void clearDocumentScope();
140 void setDocumentScope(Document* document)
143 ASSERT(this != noDocumentInstance());
144 m_documentScope = document;
147 bool hasGuardRefCount() const { return m_guardRefCount; }
152 virtual void dispose() { }
154 int refCount() const;
155 #if SECURITY_ASSERT_ENABLED
156 bool deletionHasBegun();
157 void beginDeletion();
159 bool deletionHasBegun() { return false; }
160 void beginDeletion() { }
163 bool rootNodeHasTreeSharedParent() const;
166 Document* m_documentScope;
167 TreeScope* m_parentTreeScope;
170 OwnPtr<DocumentOrderedMap> m_elementsById;
171 OwnPtr<DocumentOrderedMap> m_imageMapsByName;
172 OwnPtr<DocumentOrderedMap> m_labelsByForAttribute;
174 OwnPtr<IdTargetObserverRegistry> m_idTargetObserverRegistry;
176 mutable RefPtr<DOMSelection> m_selection;
179 inline bool TreeScope::hasElementWithId(StringImpl* id) const
182 return m_elementsById && m_elementsById->contains(id);
185 inline bool TreeScope::containsMultipleElementsWithId(const AtomicString& id) const
187 return m_elementsById && m_elementsById->containsMultiple(id.impl());
190 inline bool operator==(const TreeScope& a, const TreeScope& b) { return &a == &b; }
191 inline bool operator==(const TreeScope& a, const TreeScope* b) { return &a == b; }
192 inline bool operator==(const TreeScope* a, const TreeScope& b) { return a == &b; }
193 inline bool operator!=(const TreeScope& a, const TreeScope& b) { return !(a == b); }
194 inline bool operator!=(const TreeScope& a, const TreeScope* b) { return !(a == b); }
195 inline bool operator!=(const TreeScope* a, const TreeScope& b) { return !(a == b); }
197 RenderObject* rendererFromPoint(Document*, int x, int y, LayoutPoint* localPoint = 0);
198 TreeScope* commonTreeScope(Node*, Node*);
200 } // namespace WebCore
202 #endif // TreeScope_h