| 1 | /* |
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| 2 | * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
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| 3 | * (C) 1999 Antti Koivisto (koivisto@kde.org) |
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| 4 | * (C) 2001 Peter Kelly (pmk@post.com) |
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| 5 | * (C) 2001 Dirk Mueller (mueller@kde.org) |
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| 6 | * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
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| 7 | * |
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| 8 | * This library is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Library General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * This library is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Library General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Library General Public License |
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| 19 | * along with this library; see the file COPYING.LIB. If not, write to |
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| 20 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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| 21 | * Boston, MA 02110-1301, USA. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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| 25 | #ifndef Element_h |
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| 26 | #define Element_h |
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| 27 | |
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| 28 | #include "ContainerNode.h" |
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| 29 | #include "Document.h" |
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| 30 | #include "HTMLNames.h" |
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| 31 | #include "MappedAttributeEntry.h" |
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| 32 | #include "QualifiedName.h" |
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| 33 | #include "ScrollTypes.h" |
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| 34 | |
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| 35 | namespace WebCore { |
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| 36 | |
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| 37 | class Attr; |
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| 38 | class Attribute; |
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| 39 | class CSSStyleDeclaration; |
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| 40 | class ClientRect; |
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| 41 | class ClientRectList; |
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| 42 | class ElementRareData; |
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| 43 | class IntSize; |
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| 44 | |
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| 45 | class Element : public ContainerNode { |
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| 46 | public: |
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| 47 | static PassRefPtr<Element> create(const QualifiedName&, Document*); |
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| 48 | virtual ~Element(); |
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| 49 | |
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| 50 | DEFINE_ATTRIBUTE_EVENT_LISTENER(abort); |
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| 51 | DEFINE_ATTRIBUTE_EVENT_LISTENER(change); |
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| 52 | DEFINE_ATTRIBUTE_EVENT_LISTENER(click); |
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| 53 | DEFINE_ATTRIBUTE_EVENT_LISTENER(contextmenu); |
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| 54 | DEFINE_ATTRIBUTE_EVENT_LISTENER(dblclick); |
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| 55 | DEFINE_ATTRIBUTE_EVENT_LISTENER(dragenter); |
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| 56 | DEFINE_ATTRIBUTE_EVENT_LISTENER(dragover); |
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| 57 | DEFINE_ATTRIBUTE_EVENT_LISTENER(dragleave); |
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| 58 | DEFINE_ATTRIBUTE_EVENT_LISTENER(drop); |
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| 59 | DEFINE_ATTRIBUTE_EVENT_LISTENER(dragstart); |
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| 60 | DEFINE_ATTRIBUTE_EVENT_LISTENER(drag); |
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| 61 | DEFINE_ATTRIBUTE_EVENT_LISTENER(dragend); |
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| 62 | DEFINE_ATTRIBUTE_EVENT_LISTENER(input); |
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| 63 | DEFINE_ATTRIBUTE_EVENT_LISTENER(invalid); |
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| 64 | DEFINE_ATTRIBUTE_EVENT_LISTENER(keydown); |
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| 65 | DEFINE_ATTRIBUTE_EVENT_LISTENER(keypress); |
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| 66 | DEFINE_ATTRIBUTE_EVENT_LISTENER(keyup); |
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| 67 | DEFINE_ATTRIBUTE_EVENT_LISTENER(mousedown); |
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| 68 | DEFINE_ATTRIBUTE_EVENT_LISTENER(mousemove); |
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| 69 | DEFINE_ATTRIBUTE_EVENT_LISTENER(mouseout); |
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| 70 | DEFINE_ATTRIBUTE_EVENT_LISTENER(mouseover); |
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| 71 | DEFINE_ATTRIBUTE_EVENT_LISTENER(mouseup); |
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| 72 | DEFINE_ATTRIBUTE_EVENT_LISTENER(mousewheel); |
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| 73 | DEFINE_ATTRIBUTE_EVENT_LISTENER(scroll); |
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| 74 | DEFINE_ATTRIBUTE_EVENT_LISTENER(select); |
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| 75 | DEFINE_ATTRIBUTE_EVENT_LISTENER(submit); |
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| 76 | |
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| 77 | // These four attribute event handler attributes are overridden by HTMLBodyElement |
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| 78 | // and HTMLFrameSetElement to forward to the DOMWindow. |
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| 79 | DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(blur); |
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| 80 | DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(error); |
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| 81 | DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(focus); |
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| 82 | DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(load); |
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| 83 | |
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| 84 | // WebKit extensions |
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| 85 | DEFINE_ATTRIBUTE_EVENT_LISTENER(beforecut); |
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| 86 | DEFINE_ATTRIBUTE_EVENT_LISTENER(cut); |
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| 87 | DEFINE_ATTRIBUTE_EVENT_LISTENER(beforecopy); |
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| 88 | DEFINE_ATTRIBUTE_EVENT_LISTENER(copy); |
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| 89 | DEFINE_ATTRIBUTE_EVENT_LISTENER(beforepaste); |
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| 90 | DEFINE_ATTRIBUTE_EVENT_LISTENER(paste); |
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| 91 | DEFINE_ATTRIBUTE_EVENT_LISTENER(reset); |
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| 92 | DEFINE_ATTRIBUTE_EVENT_LISTENER(search); |
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| 93 | DEFINE_ATTRIBUTE_EVENT_LISTENER(selectstart); |
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| 94 | #if ENABLE(TOUCH_EVENTS) |
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| 95 | DEFINE_ATTRIBUTE_EVENT_LISTENER(touchstart); |
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| 96 | DEFINE_ATTRIBUTE_EVENT_LISTENER(touchmove); |
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| 97 | DEFINE_ATTRIBUTE_EVENT_LISTENER(touchend); |
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| 98 | DEFINE_ATTRIBUTE_EVENT_LISTENER(touchcancel); |
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| 99 | #endif |
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| 100 | |
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| 101 | virtual PassRefPtr<DocumentFragment> createContextualFragment(const String&, FragmentScriptingPermission = FragmentScriptingAllowed); |
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| 102 | |
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| 103 | const AtomicString& getIDAttribute() const; |
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| 104 | bool hasAttribute(const QualifiedName&) const; |
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| 105 | const AtomicString& getAttribute(const QualifiedName&) const; |
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| 106 | void setAttribute(const QualifiedName&, const AtomicString& value, ExceptionCode&); |
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| 107 | void removeAttribute(const QualifiedName&, ExceptionCode&); |
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| 108 | |
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| 109 | bool hasAttributes() const; |
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| 110 | |
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| 111 | bool hasAttribute(const String& name) const; |
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| 112 | bool hasAttributeNS(const String& namespaceURI, const String& localName) const; |
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| 113 | |
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| 114 | const AtomicString& getAttribute(const String& name) const; |
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| 115 | const AtomicString& getAttributeNS(const String& namespaceURI, const String& localName) const; |
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| 116 | |
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| 117 | void setAttribute(const AtomicString& name, const AtomicString& value, ExceptionCode&); |
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| 118 | void setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionCode&, FragmentScriptingPermission = FragmentScriptingAllowed); |
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| 119 | |
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| 120 | const QualifiedName& idAttributeName() const; |
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| 121 | |
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| 122 | void scrollIntoView(bool alignToTop = true); |
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| 123 | void scrollIntoViewIfNeeded(bool centerIfNeeded = true); |
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| 124 | |
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| 125 | void scrollByLines(int lines); |
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| 126 | void scrollByPages(int pages); |
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| 127 | |
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| 128 | int offsetLeft(); |
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| 129 | int offsetTop(); |
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| 130 | int offsetWidth(); |
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| 131 | int offsetHeight(); |
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| 132 | Element* offsetParent(); |
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| 133 | int clientLeft(); |
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| 134 | int clientTop(); |
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| 135 | int clientWidth(); |
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| 136 | int clientHeight(); |
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| 137 | virtual int scrollLeft() const; |
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| 138 | virtual int scrollTop() const; |
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| 139 | virtual void setScrollLeft(int); |
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| 140 | virtual void setScrollTop(int); |
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| 141 | virtual int scrollWidth() const; |
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| 142 | virtual int scrollHeight() const; |
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| 143 | |
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| 144 | PassRefPtr<ClientRectList> getClientRects() const; |
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| 145 | PassRefPtr<ClientRect> getBoundingClientRect() const; |
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| 146 | |
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| 147 | void removeAttribute(const String& name, ExceptionCode&); |
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| 148 | void removeAttributeNS(const String& namespaceURI, const String& localName, ExceptionCode&); |
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| 149 | |
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| 150 | PassRefPtr<Attr> getAttributeNode(const String& name); |
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| 151 | PassRefPtr<Attr> getAttributeNodeNS(const String& namespaceURI, const String& localName); |
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| 152 | PassRefPtr<Attr> setAttributeNode(Attr*, ExceptionCode&); |
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| 153 | PassRefPtr<Attr> setAttributeNodeNS(Attr*, ExceptionCode&); |
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| 154 | PassRefPtr<Attr> removeAttributeNode(Attr*, ExceptionCode&); |
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| 155 | |
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| 156 | virtual CSSStyleDeclaration* style(); |
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| 157 | |
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| 158 | const QualifiedName& tagQName() const { return m_tagName; } |
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| 159 | String tagName() const { return nodeName(); } |
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| 160 | bool hasTagName(const QualifiedName& tagName) const { return m_tagName.matches(tagName); } |
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| 161 | |
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| 162 | // A fast function for checking the local name against another atomic string. |
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| 163 | bool hasLocalName(const AtomicString& other) const { return m_tagName.localName() == other; } |
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| 164 | bool hasLocalName(const QualifiedName& other) const { return m_tagName.localName() == other.localName(); } |
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| 165 | |
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| 166 | const AtomicString& localName() const { return m_tagName.localName(); } |
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| 167 | const AtomicString& prefix() const { return m_tagName.prefix(); } |
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| 168 | const AtomicString& namespaceURI() const { return m_tagName.namespaceURI(); } |
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| 169 | |
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| 170 | virtual KURL baseURI() const; |
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| 171 | |
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| 172 | virtual String nodeName() const; |
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| 173 | |
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| 174 | PassRefPtr<Element> cloneElementWithChildren(); |
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| 175 | PassRefPtr<Element> cloneElementWithoutChildren(); |
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| 176 | |
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| 177 | void normalizeAttributes(); |
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| 178 | String nodeNamePreservingCase() const; |
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| 179 | |
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| 180 | // convenience methods which ignore exceptions |
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| 181 | void setAttribute(const QualifiedName&, const AtomicString& value); |
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| 182 | void setBooleanAttribute(const QualifiedName& name, bool); |
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| 183 | // Please don't use setCStringAttribute in performance-sensitive code; |
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| 184 | // use a static AtomicString value instead to avoid the conversion overhead. |
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| 185 | void setCStringAttribute(const QualifiedName&, const char* cStringValue); |
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| 186 | |
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| 187 | virtual NamedNodeMap* attributes() const; |
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| 188 | NamedNodeMap* attributes(bool readonly) const; |
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| 189 | |
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| 190 | // This method is called whenever an attribute is added, changed or removed. |
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| 191 | virtual void attributeChanged(Attribute*, bool preserveDecls = false); |
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| 192 | |
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| 193 | // not part of the DOM |
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| 194 | void setAttributeMap(PassRefPtr<NamedNodeMap>, FragmentScriptingPermission = FragmentScriptingAllowed); |
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| 195 | NamedNodeMap* attributeMap() const { return namedAttrMap.get(); } |
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| 196 | |
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| 197 | virtual void copyNonAttributeProperties(const Element* /*source*/) { } |
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| 198 | |
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| 199 | virtual void attach(); |
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| 200 | virtual void detach(); |
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| 201 | virtual RenderObject* createRenderer(RenderArena*, RenderStyle*); |
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| 202 | virtual void recalcStyle(StyleChange = NoChange); |
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| 203 | |
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| 204 | virtual RenderStyle* computedStyle(); |
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| 205 | |
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| 206 | void dispatchAttrRemovalEvent(Attribute*); |
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| 207 | void dispatchAttrAdditionEvent(Attribute*); |
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| 208 | |
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| 209 | virtual void accessKeyAction(bool /*sendToAnyEvent*/) { } |
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| 210 | |
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| 211 | virtual bool isURLAttribute(Attribute*) const; |
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| 212 | KURL getURLAttribute(const QualifiedName&) const; |
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| 213 | virtual const QualifiedName& imageSourceAttributeName() const; |
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| 214 | virtual String target() const { return String(); } |
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| 215 | |
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| 216 | virtual void focus(bool restorePreviousSelection = true); |
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| 217 | virtual void updateFocusAppearance(bool restorePreviousSelection); |
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| 218 | void blur(); |
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| 219 | |
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| 220 | String innerText() const; |
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| 221 | String outerText() const; |
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| 222 | |
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| 223 | virtual String title() const; |
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| 224 | |
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| 225 | String openTagStartToString() const; |
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| 226 | |
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| 227 | void updateId(const AtomicString& oldId, const AtomicString& newId); |
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| 228 | |
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| 229 | IntSize minimumSizeForResizing() const; |
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| 230 | void setMinimumSizeForResizing(const IntSize&); |
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| 231 | |
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| 232 | // Use Document::registerForDocumentActivationCallbacks() to subscribe to these |
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| 233 | virtual void documentWillBecomeInactive() { } |
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| 234 | virtual void documentDidBecomeActive() { } |
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| 235 | |
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| 236 | // Use Document::registerForMediaVolumeCallbacks() to subscribe to this |
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| 237 | virtual void mediaVolumeDidChange() { } |
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| 238 | |
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| 239 | bool isFinishedParsingChildren() const { return m_parsingChildrenFinished; } |
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| 240 | virtual void finishParsingChildren(); |
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| 241 | virtual void beginParsingChildren() { m_parsingChildrenFinished = false; } |
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| 242 | |
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| 243 | // ElementTraversal API |
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| 244 | Element* firstElementChild() const; |
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| 245 | Element* lastElementChild() const; |
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| 246 | Element* previousElementSibling() const; |
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| 247 | Element* nextElementSibling() const; |
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| 248 | unsigned childElementCount() const; |
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| 249 | |
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| 250 | bool webkitMatchesSelector(const String& selectors, ExceptionCode&); |
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| 251 | |
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| 252 | virtual bool isFormControlElement() const { return false; } |
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| 253 | virtual bool isEnabledFormControl() const { return true; } |
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| 254 | virtual bool isReadOnlyFormControl() const { return false; } |
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| 255 | virtual bool isTextFormControl() const { return false; } |
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| 256 | virtual bool isOptionalFormControl() const { return false; } |
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| 257 | virtual bool isRequiredFormControl() const { return false; } |
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| 258 | virtual bool isDefaultButtonForForm() const { return false; } |
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| 259 | virtual bool willValidate() const { return false; } |
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| 260 | virtual bool isValidFormControlElement() { return false; } |
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| 261 | |
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| 262 | virtual bool formControlValueMatchesRenderer() const { return false; } |
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| 263 | virtual void setFormControlValueMatchesRenderer(bool) { } |
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| 264 | |
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| 265 | virtual const AtomicString& formControlName() const { return nullAtom; } |
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| 266 | virtual const AtomicString& formControlType() const { return nullAtom; } |
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| 267 | |
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| 268 | virtual bool saveFormControlState(String&) const { return false; } |
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| 269 | virtual void restoreFormControlState(const String&) { } |
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| 270 | |
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| 271 | virtual void dispatchFormControlChangeEvent() { } |
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| 272 | |
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| 273 | protected: |
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| 274 | Element(const QualifiedName&, Document*, ConstructionType); |
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| 275 | |
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| 276 | virtual void insertedIntoDocument(); |
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| 277 | virtual void removedFromDocument(); |
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| 278 | virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0); |
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| 279 | |
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| 280 | // The implementation of Element::attributeChanged() calls the following two functions. |
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| 281 | // They are separated to allow a different flow of control in StyledElement::attributeChanged(). |
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| 282 | void recalcStyleIfNeededAfterAttributeChanged(Attribute*); |
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| 283 | void updateAfterAttributeChanged(Attribute*); |
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| 284 | |
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| 285 | private: |
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| 286 | void scrollByUnits(int units, ScrollGranularity); |
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| 287 | |
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| 288 | virtual void setPrefix(const AtomicString&, ExceptionCode&); |
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| 289 | virtual NodeType nodeType() const; |
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| 290 | virtual bool childTypeAllowed(NodeType); |
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| 291 | |
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| 292 | virtual PassRefPtr<Attribute> createAttribute(const QualifiedName&, const AtomicString& value); |
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| 293 | const QualifiedName& rareIDAttributeName() const; |
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| 294 | |
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| 295 | #ifndef NDEBUG |
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| 296 | virtual void formatForDebugger(char* buffer, unsigned length) const; |
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| 297 | #endif |
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| 298 | |
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| 299 | bool pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle); |
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| 300 | |
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| 301 | virtual void createAttributeMap() const; |
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| 302 | |
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| 303 | virtual void updateStyleAttribute() const { } |
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| 304 | |
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| 305 | #if ENABLE(SVG) |
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| 306 | virtual void updateAnimatedSVGAttribute(const QualifiedName&) const { } |
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| 307 | #endif |
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| 308 | |
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| 309 | void cancelFocusAppearanceUpdate(); |
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| 310 | |
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| 311 | virtual const AtomicString& virtualPrefix() const { return prefix(); } |
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| 312 | virtual const AtomicString& virtualLocalName() const { return localName(); } |
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| 313 | virtual const AtomicString& virtualNamespaceURI() const { return namespaceURI(); } |
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| 314 | |
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| 315 | // cloneNode is private so that non-virtual cloneElementWithChildren and cloneElementWithoutChildren |
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| 316 | // are used instead. |
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| 317 | virtual PassRefPtr<Node> cloneNode(bool deep); |
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| 318 | |
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| 319 | QualifiedName m_tagName; |
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| 320 | virtual NodeRareData* createRareData(); |
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| 321 | |
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| 322 | ElementRareData* rareData() const; |
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| 323 | ElementRareData* ensureRareData(); |
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| 324 | |
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| 325 | protected: |
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| 326 | mutable RefPtr<NamedNodeMap> namedAttrMap; |
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| 327 | }; |
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| 328 | |
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| 329 | inline bool Node::hasTagName(const QualifiedName& name) const |
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| 330 | { |
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| 331 | return isElementNode() && static_cast<const Element*>(this)->hasTagName(name); |
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| 332 | } |
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| 333 | |
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| 334 | inline bool Node::hasAttributes() const |
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| 335 | { |
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| 336 | return isElementNode() && static_cast<const Element*>(this)->hasAttributes(); |
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| 337 | } |
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| 338 | |
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| 339 | inline NamedNodeMap* Node::attributes() const |
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| 340 | { |
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| 341 | return isElementNode() ? static_cast<const Element*>(this)->attributes() : 0; |
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| 342 | } |
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| 343 | |
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| 344 | inline Element* Node::parentElement() const |
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| 345 | { |
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| 346 | Node* parent = parentNode(); |
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| 347 | return parent && parent->isElementNode() ? static_cast<Element*>(parent) : 0; |
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| 348 | } |
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| 349 | |
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| 350 | inline const QualifiedName& Element::idAttributeName() const |
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| 351 | { |
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| 352 | return hasRareData() ? rareIDAttributeName() : HTMLNames::idAttr; |
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| 353 | } |
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| 354 | |
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| 355 | inline NamedNodeMap* Element::attributes(bool readonly) const |
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| 356 | { |
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| 357 | if (!m_isStyleAttributeValid) |
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| 358 | updateStyleAttribute(); |
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| 359 | |
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| 360 | #if ENABLE(SVG) |
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| 361 | if (!m_areSVGAttributesValid) |
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| 362 | updateAnimatedSVGAttribute(anyQName()); |
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| 363 | #endif |
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| 364 | |
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| 365 | if (!readonly && !namedAttrMap) |
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| 366 | createAttributeMap(); |
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| 367 | return namedAttrMap.get(); |
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| 368 | } |
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| 369 | |
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| 370 | inline void Element::updateId(const AtomicString& oldId, const AtomicString& newId) |
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| 371 | { |
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| 372 | if (!inDocument()) |
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| 373 | return; |
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| 374 | |
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| 375 | if (oldId == newId) |
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| 376 | return; |
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| 377 | |
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| 378 | Document* doc = document(); |
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| 379 | if (!oldId.isEmpty()) |
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| 380 | doc->removeElementById(oldId, this); |
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| 381 | if (!newId.isEmpty()) |
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| 382 | doc->addElementById(newId, this); |
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| 383 | } |
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| 384 | |
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| 385 | } //namespace |
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| 386 | |
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| 387 | #endif |
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