author | Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com> |
Fri, 08 May 2009 08:25:06 +0300 | |
changeset 8 | 7c90e6132015 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
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* (C) 1999 Antti Koivisto (koivisto@kde.org) |
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* (C) 2001 Dirk Mueller (mueller@kde.org) |
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* Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef Node_h |
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#define Node_h |
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#include "DocPtr.h" |
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#include "PlatformString.h" |
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#include "DeprecatedString.h" |
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#include <wtf/Assertions.h> |
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#include <wtf/HashSet.h> |
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#include <wtf/PassRefPtr.h> |
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namespace WebCore { |
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class AtomicString; |
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class ContainerNode; |
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class Document; |
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class Element; |
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class Event; |
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class EventListener; |
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class IntRect; |
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class KeyboardEvent; |
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class NamedAttrMap; |
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class NodeList; |
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struct NodeListsNodeData; |
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class PlatformKeyboardEvent; |
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class PlatformMouseEvent; |
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class PlatformWheelEvent; |
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class QualifiedName; |
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class RegisteredEventListener; |
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class RenderArena; |
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class RenderObject; |
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class RenderStyle; |
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class TextStream; |
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typedef int ExceptionCode; |
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enum StyleChangeType { NoStyleChange, InlineStyleChange, FullStyleChange }; |
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// this class implements nodes, which can have a parent but no children: |
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class Node : public TreeShared<Node> { |
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friend class Document; |
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public: |
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enum NodeType { |
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ELEMENT_NODE = 1, |
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ATTRIBUTE_NODE = 2, |
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TEXT_NODE = 3, |
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CDATA_SECTION_NODE = 4, |
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ENTITY_REFERENCE_NODE = 5, |
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ENTITY_NODE = 6, |
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PROCESSING_INSTRUCTION_NODE = 7, |
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COMMENT_NODE = 8, |
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DOCUMENT_NODE = 9, |
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DOCUMENT_TYPE_NODE = 10, |
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DOCUMENT_FRAGMENT_NODE = 11, |
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NOTATION_NODE = 12, |
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XPATH_NAMESPACE_NODE = 13 |
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}; |
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static bool isSupported(const String& feature, const String& version); |
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static void startIgnoringLeaks(); |
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static void stopIgnoringLeaks(); |
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Node(Document*); |
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virtual ~Node(); |
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// DOM methods & attributes for Node |
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virtual bool hasTagName(const QualifiedName&) const { return false; } |
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virtual String nodeName() const = 0; |
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virtual String nodeValue() const; |
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virtual void setNodeValue(const String&, ExceptionCode&); |
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virtual NodeType nodeType() const = 0; |
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Node* parentNode() const { return parent(); } |
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Node* parentElement() const { return parent(); } // IE extension |
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Node* previousSibling() const { return m_previous; } |
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Node* nextSibling() const { return m_next; } |
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virtual PassRefPtr<NodeList> childNodes(); |
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Node* firstChild() const { return virtualFirstChild(); } |
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Node* lastChild() const { return virtualLastChild(); } |
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virtual bool hasAttributes() const; |
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virtual NamedAttrMap* attributes() const; |
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virtual String baseURI() const; |
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// These should all actually return a node, but this is only important for language bindings, |
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// which will already know and hold a ref on the right node to return. Returning bool allows |
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// these methods to be more efficient since they don't need to return a ref |
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virtual bool insertBefore(PassRefPtr<Node> newChild, Node* refChild, ExceptionCode&); |
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virtual bool replaceChild(PassRefPtr<Node> newChild, Node* oldChild, ExceptionCode&); |
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virtual bool removeChild(Node* child, ExceptionCode&); |
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virtual bool appendChild(PassRefPtr<Node> newChild, ExceptionCode&); |
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virtual void remove(ExceptionCode&); |
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virtual bool hasChildNodes() const; |
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virtual PassRefPtr<Node> cloneNode(bool deep) = 0; |
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virtual const AtomicString& localName() const; |
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virtual const AtomicString& namespaceURI() const; |
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virtual const AtomicString& prefix() const; |
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virtual void setPrefix(const AtomicString&, ExceptionCode&); |
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void normalize(); |
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124 |
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bool isSameNode(Node* other) const { return this == other; } |
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bool isEqualNode(Node*) const; |
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bool isDefaultNamespace(const String& namespaceURI) const; |
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String lookupPrefix(const String& namespaceURI) const; |
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String lookupNamespaceURI(const String& prefix) const; |
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String lookupNamespacePrefix(const String& namespaceURI, const Element* originalElement) const; |
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String textContent(bool convertBRsToNewlines = false) const; |
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void setTextContent(const String&, ExceptionCode&); |
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134 |
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Node* lastDescendant() const; |
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Node* firstDescendant() const; |
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137 |
|
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// Other methods (not part of DOM) |
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139 |
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virtual bool isElementNode() const { return false; } |
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virtual bool isHTMLElement() const { return false; } |
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#if ENABLE(SVG) |
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virtual bool isSVGElement() const { return false; } |
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#endif |
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virtual bool isStyledElement() const { return false; } |
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virtual bool isFrameOwnerElement() const { return false; } |
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virtual bool isAttributeNode() const { return false; } |
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virtual bool isTextNode() const { return false; } |
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virtual bool isCommentNode() const { return false; } |
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virtual bool isCharacterDataNode() const { return false; } |
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virtual bool isDocumentNode() const { return false; } |
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virtual bool isEventTargetNode() const { return false; } |
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virtual bool isShadowNode() const { return false; } |
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virtual Node* shadowParentNode() { return 0; } |
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Node* shadowAncestorNode(); |
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156 |
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// The node's parent for the purpose of event capture and bubbling. |
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virtual Node* eventParentNode() { return parentNode(); } |
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159 |
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bool isBlockFlow() const; |
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bool isBlockFlowOrBlockTable() const; |
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162 |
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// Used by <form> elements to indicate a malformed state of some kind, typically |
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// used to keep from applying the bottom margin of the form. |
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virtual bool isMalformed() { return false; } |
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virtual void setMalformed(bool malformed) { } |
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167 |
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// These low-level calls give the caller responsibility for maintaining the integrity of the tree. |
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void setPreviousSibling(Node* previous) { m_previous = previous; } |
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void setNextSibling(Node* next) { m_next = next; } |
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171 |
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// FIXME: These two functions belong in editing -- "atomic node" is an editing concept. |
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Node* previousNodeConsideringAtomicNodes() const; |
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Node* nextNodeConsideringAtomicNodes() const; |
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175 |
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/** (Not part of the official DOM) |
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* Returns the next leaf node. |
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* |
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* Using this function delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes. |
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* @return next leaf node or 0 if there are no more. |
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*/ |
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Node* nextLeafNode() const; |
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183 |
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/** (Not part of the official DOM) |
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* Returns the previous leaf node. |
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* |
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* Using this function delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes. |
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* @return previous leaf node or 0 if there are no more. |
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*/ |
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Node* previousLeafNode() const; |
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191 |
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bool isEditableBlock() const; |
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Element* enclosingBlockFlowElement() const; |
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Element* enclosingBlockFlowOrTableElement() const; |
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Element* enclosingInlineElement() const; |
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Element* rootEditableElement() const; |
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197 |
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bool inSameContainingBlockFlowElement(Node*); |
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// Used by the parser. Checks against the DTD, unlike DOM operations like appendChild(). |
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// Also does not dispatch DOM mutation events. |
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// Returns the appropriate container node for future insertions as you parse, or 0 for failure. |
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virtual ContainerNode* addChild(PassRefPtr<Node>); |
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204 |
|
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// Called by the parser when this element's close tag is reached, |
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// signalling that all child tags have been parsed and added. |
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// This is needed for <applet> and <object> elements, which can't lay themselves out |
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// until they know all of their nested <param>s. [Radar 3603191, 4040848]. |
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// Also used for script elements and some SVG elements for similar purposes, |
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// but making parsing a special case in this respect should be avoided if possible. |
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virtual void finishedParsing() { } |
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|
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// Called by the frame right before dispatching an unloadEvent. [Radar 4532113] |
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// This is needed for HTMLInputElements to tell the frame that it is done editing |
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// (sends textFieldDidEndEditing notification) |
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virtual void aboutToUnload() { } |
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// For <link> and <style> elements. |
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virtual bool sheetLoaded() { return true; } |
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bool hasID() const { return m_hasId; } |
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bool hasClass() const { return m_hasClass; } |
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bool active() const { return m_active; } |
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bool inActiveChain() const { return m_inActiveChain; } |
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bool inDetach() const { return m_inDetach; } |
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bool hovered() const { return m_hovered; } |
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bool focused() const { return m_focused; } |
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bool attached() const { return m_attached; } |
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void setAttached(bool b = true) { m_attached = b; } |
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bool changed() const { return m_styleChange != NoStyleChange; } |
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StyleChangeType styleChangeType() const { return static_cast<StyleChangeType>(m_styleChange); } |
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bool hasChangedChild() const { return m_hasChangedChild; } |
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bool isLink() const { return m_isLink; } |
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void setHasID(bool b = true) { m_hasId = b; } |
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void setHasClass(bool b = true) { m_hasClass = b; } |
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void setHasChangedChild( bool b = true ) { m_hasChangedChild = b; } |
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void setInDocument(bool b = true) { m_inDocument = b; } |
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void setInActiveChain(bool b = true) { m_inActiveChain = b; } |
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void setChanged(StyleChangeType changeType = FullStyleChange); |
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|
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virtual void setFocus(bool b = true) { m_focused = b; } |
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virtual void setActive(bool b = true, bool pause=false) { m_active = b; } |
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virtual void setHovered(bool b = true) { m_hovered = b; } |
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short tabIndex() const { return m_tabIndex; } |
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void setTabIndex(short i) { m_tabIndex = i; } |
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/** |
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* Whether this node can receive the keyboard focus. |
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*/ |
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virtual bool supportsFocus() const { return isFocusable(); } |
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virtual bool isFocusable() const; |
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virtual bool isKeyboardFocusable(KeyboardEvent*) const; |
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virtual bool isMouseFocusable() const; |
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virtual bool isControl() const { return false; } // Eventually the notion of what is a control will be extensible. |
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virtual bool isEnabled() const { return true; } |
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virtual bool isChecked() const { return false; } |
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virtual bool isIndeterminate() const { return false; } |
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virtual bool isReadOnlyControl() const { return false; } |
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virtual bool isContentEditable() const; |
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virtual bool isContentRichlyEditable() const; |
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virtual bool shouldUseInputMethod() const; |
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virtual IntRect getRect() const; |
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enum StyleChange { NoChange, NoInherit, Inherit, Detach, Force }; |
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virtual void recalcStyle(StyleChange = NoChange) { } |
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StyleChange diff(RenderStyle*, RenderStyle*) const; |
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unsigned nodeIndex() const; |
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// Returns the DOM ownerDocument attribute. This method never returns NULL, except in the case |
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// of (1) a Document node or (2) a DocumentType node that is not used with any Document yet. |
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virtual Document* ownerDocument() const; |
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// Returns the document associated with this node. This method never returns NULL, except in the case |
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// of a DocumentType node that is not used with any Document yet. A Document node returns itself. |
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Document* document() const |
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{ |
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ASSERT(this); |
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ASSERT(m_document || nodeType() == DOCUMENT_TYPE_NODE && !inDocument()); |
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return m_document.get(); |
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} |
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void setDocument(Document*); |
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// Returns true if this node is associated with a document and is in its associated document's |
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// node tree, false otherwise. |
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bool inDocument() const |
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{ |
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ASSERT(m_document || !m_inDocument); |
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return m_inDocument; |
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} |
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virtual bool isReadOnlyNode(); |
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virtual bool childTypeAllowed(NodeType) { return false; } |
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virtual unsigned childNodeCount() const; |
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virtual Node* childNode(unsigned index) const; |
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/** |
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* Does a pre-order traversal of the tree to find the node next node after this one. This uses the same order that |
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* the tags appear in the source file. |
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* |
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* @param stayWithin If not null, the traversal will stop once the specified node is reached. This can be used to |
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* restrict traversal to a particular sub-tree. |
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* |
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* @return The next node, in document order |
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* |
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* see @ref traversePreviousNode() |
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*/ |
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Node* traverseNextNode(const Node* stayWithin = 0) const; |
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/* Like traverseNextNode, but skips children and starts with the next sibling. */ |
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Node* traverseNextSibling(const Node* stayWithin = 0) const; |
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/** |
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* Does a reverse pre-order traversal to find the node that comes before the current one in document order |
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* |
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* see @ref traverseNextNode() |
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*/ |
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Node* traversePreviousNode(const Node * stayWithin = 0) const; |
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/* Like traversePreviousNode, but visits nodes before their children. */ |
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Node* traversePreviousNodePostOrder(const Node *stayWithin = 0) const; |
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/** |
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* Finds previous or next editable leaf node. |
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*/ |
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Node* previousEditable() const; |
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Node* nextEditable() const; |
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Node* nextEditable(int offset) const; |
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RenderObject* renderer() const { return m_renderer; } |
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RenderObject* nextRenderer(); |
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RenderObject* previousRenderer(); |
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void setRenderer(RenderObject* renderer) { m_renderer = renderer; } |
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|
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void checkSetPrefix(const AtomicString& prefix, ExceptionCode&); |
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bool isDescendantOf(const Node*) const; |
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|
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// These two methods are mutually exclusive. The former is used to do strict error-checking |
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// when adding children via the public DOM API (e.g., appendChild()). The latter is called only when parsing, |
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// to sanity-check against the DTD for error recovery. |
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void checkAddChild(Node* newChild, ExceptionCode&); // Error-checking when adding via the DOM API |
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virtual bool childAllowed(Node* newChild); // Error-checking during parsing that checks the DTD |
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|
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void checkReplaceChild(Node* newChild, Node* oldChild, ExceptionCode&); |
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virtual bool canReplaceChild(Node* newChild, Node* oldChild); |
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|
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// Used to determine whether range offsets use characters or node indices. |
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virtual bool offsetInCharacters() const; |
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|
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// FIXME: These next 7 functions are mostly editing-specific and should be moved out. |
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virtual int maxOffset() const; |
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virtual int caretMinOffset() const; |
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virtual int caretMaxOffset() const; |
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virtual unsigned caretMaxRenderedOffset() const; |
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virtual int previousOffset(int current) const; |
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virtual int nextOffset(int current) const; |
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|
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// FIXME: We should try to find a better location for these methods. |
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virtual bool canSelectAll() const { return false; } |
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virtual void selectAll() { } |
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// Whether or not a selection can be started in this object |
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virtual bool canStartSelection() const; |
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#ifndef NDEBUG |
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virtual void dump(TextStream*, DeprecatedString indent = "") const; |
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#endif |
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// ----------------------------------------------------------------------------- |
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// Integration with rendering tree |
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/** |
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* Attaches this node to the rendering tree. This calculates the style to be applied to the node and creates an |
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* appropriate RenderObject which will be inserted into the tree (except when the style has display: none). This |
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* makes the node visible in the FrameView. |
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*/ |
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virtual void attach(); |
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|
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/** |
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* Detaches the node from the rendering tree, making it invisible in the rendered view. This method will remove |
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* the node's rendering object from the rendering tree and delete it. |
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*/ |
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virtual void detach(); |
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virtual void willRemove(); |
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void createRendererIfNeeded(); |
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virtual RenderStyle* styleForRenderer(RenderObject* parent); |
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virtual bool rendererIsNeeded(RenderStyle*); |
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#if ENABLE(SVG) |
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virtual bool childShouldCreateRenderer(Node*) const { return true; } |
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#endif |
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virtual RenderObject* createRenderer(RenderArena*, RenderStyle*); |
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396 |
|
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// Wrapper for nodes that don't have a renderer, but still cache the style (like HTMLOptionElement). |
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virtual RenderStyle* renderStyle() const; |
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virtual void setRenderStyle(RenderStyle*); |
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virtual RenderStyle* computedStyle(); |
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|
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// ----------------------------------------------------------------------------- |
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// Notification of document structure changes |
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405 |
|
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/** |
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* Notifies the node that it has been inserted into the document. This is called during document parsing, and also |
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* when a node is added through the DOM methods insertBefore(), appendChild() or replaceChild(). Note that this only |
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* happens when the node becomes part of the document tree, i.e. only when the document is actually an ancestor of |
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* the node. The call happens _after_ the node has been added to the tree. |
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* |
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* This is similar to the DOMNodeInsertedIntoDocument DOM event, but does not require the overhead of event |
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* dispatching. |
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*/ |
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virtual void insertedIntoDocument(); |
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|
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/** |
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* Notifies the node that it is no longer part of the document tree, i.e. when the document is no longer an ancestor |
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* node. |
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* |
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* This is similar to the DOMNodeRemovedFromDocument DOM event, but does not require the overhead of event |
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* dispatching, and is called _after_ the node is removed from the tree. |
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*/ |
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virtual void removedFromDocument(); |
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|
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// These functions are called whenever you are connected or disconnected from a tree. That tree may be the main |
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// document tree, or it could be another disconnected tree. Override these functions to do any work that depends |
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// on connectedness to some ancestor (e.g., an ancestor <form> for example). |
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virtual void insertedIntoTree(bool deep) { } |
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virtual void removedFromTree(bool deep) { } |
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/** |
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* Notifies the node that it's list of children have changed (either by adding or removing child nodes), or a child |
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* node that is of the type CDATA_SECTION_NODE, TEXT_NODE or COMMENT_NODE has changed its value. |
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*/ |
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virtual void childrenChanged(); |
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virtual String toString() const = 0; |
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#ifndef NDEBUG |
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virtual void formatForDebugger(char* buffer, unsigned length) const; |
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void showNode(const char* prefix = "") const; |
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void showTreeForThis() const; |
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void showTreeAndMark(const Node* markedNode1, const char* markedLabel1, const Node* markedNode2 = 0, const char* markedLabel2 = 0) const; |
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#endif |
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|
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void registerNodeList(NodeList*); |
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void unregisterNodeList(NodeList*); |
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void notifyNodeListsChildrenChanged(); |
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void notifyLocalNodeListsChildrenChanged(); |
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void notifyNodeListsAttributeChanged(); |
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void notifyLocalNodeListsAttributeChanged(); |
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PassRefPtr<NodeList> getElementsByTagName(const String&); |
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PassRefPtr<NodeList> getElementsByTagNameNS(const String& namespaceURI, const String& localName); |
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|
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private: // members |
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DocPtr<Document> m_document; |
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Node* m_previous; |
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Node* m_next; |
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RenderObject* m_renderer; |
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|
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protected: |
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virtual void willMoveToNewOwnerDocument() { } |
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virtual void didMoveToNewOwnerDocument() { } |
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|
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NodeListsNodeData* m_nodeLists; |
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short m_tabIndex; |
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// make sure we don't use more than 16 bits here -- adding more would increase the size of all Nodes |
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bool m_hasId : 1; |
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bool m_hasClass : 1; |
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bool m_attached : 1; |
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unsigned m_styleChange : 2; |
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bool m_hasChangedChild : 1; |
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bool m_inDocument : 1; |
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bool m_isLink : 1; |
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bool m_attrWasSpecifiedOrElementHasRareData : 1; // used in Attr for one thing and Element for another |
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bool m_focused : 1; |
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bool m_active : 1; |
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bool m_hovered : 1; |
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bool m_inActiveChain : 1; |
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bool m_inDetach : 1; |
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bool m_dispatchingSimulatedEvent : 1; |
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491 |
public: |
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bool m_inSubtreeMark : 1; |
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// 0 bits left |
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private: |
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Element* ancestorElement() const; |
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virtual Node* virtualFirstChild() const; |
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virtual Node* virtualLastChild() const; |
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}; |
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} //namespace |
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#ifndef NDEBUG |
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// Outside the WebCore namespace for ease of invocation from gdb. |
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void showTree(const WebCore::Node*); |
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#endif |
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#endif |