1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * (C) 2001 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24 #ifndef Node_h
25 #define Node_h
26
27 #include "DocPtr.h"
28 #include "KURLHash.h"
29 #include "PlatformString.h"
30 #include "TreeShared.h"
31 #include <wtf/Assertions.h>
32 #include <wtf/ListHashSet.h>
33 #include <wtf/OwnPtr.h>
34 #include <wtf/PassRefPtr.h>
35
36 namespace WebCore {
37
38 class AtomicString;
39 class ContainerNode;
40 class Document;
41 class DynamicNodeList;
42 class Element;
43 class Event;
44 class EventListener;
45 class IntRect;
46 class KeyboardEvent;
47 class NSResolver;
48 class NamedAttrMap;
49 class NodeList;
50 class PlatformKeyboardEvent;
51 class PlatformMouseEvent;
52 class PlatformWheelEvent;
53 class QualifiedName;
54 class RenderArena;
55 class RenderBox;
56 class RenderObject;
57 class RenderStyle;
58 class StringBuilder;
59 class NodeRareData;
60
61 typedef int ExceptionCode;
62
63 enum StyleChangeType { NoStyleChange, InlineStyleChange, FullStyleChange, AnimationStyleChange };
64
65 const unsigned short DOCUMENT_POSITION_EQUIVALENT = 0x00;
66 const unsigned short DOCUMENT_POSITION_DISCONNECTED = 0x01;
67 const unsigned short DOCUMENT_POSITION_PRECEDING = 0x02;
68 const unsigned short DOCUMENT_POSITION_FOLLOWING = 0x04;
69 const unsigned short DOCUMENT_POSITION_CONTAINS = 0x08;
70 const unsigned short DOCUMENT_POSITION_CONTAINED_BY = 0x10;
71 const unsigned short DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;
72
73 // this class implements nodes, which can have a parent but no children:
74 class Node : public TreeShared<Node> {
75 friend class Document;
76 public:
77 enum NodeType {
78 ELEMENT_NODE = 1,
79 ATTRIBUTE_NODE = 2,
80 TEXT_NODE = 3,
81 CDATA_SECTION_NODE = 4,
82 ENTITY_REFERENCE_NODE = 5,
83 ENTITY_NODE = 6,
84 PROCESSING_INSTRUCTION_NODE = 7,
85 COMMENT_NODE = 8,
86 DOCUMENT_NODE = 9,
87 DOCUMENT_TYPE_NODE = 10,
88 DOCUMENT_FRAGMENT_NODE = 11,
89 NOTATION_NODE = 12,
90 XPATH_NAMESPACE_NODE = 13
91 };
92
93 static bool isSupported(const String& feature, const String& version);
94
95 static void startIgnoringLeaks();
96 static void stopIgnoringLeaks();
97
98 static void dumpStatistics();
99
100 enum StyleChange { NoChange, NoInherit, Inherit, Detach, Force };
101 static StyleChange diff(RenderStyle*, RenderStyle*);
102
103 Node(Document*, bool isElement = false, bool isContainer = false, bool isText = false);
104 virtual ~Node();
105
106 // DOM methods & attributes for Node
107
108 bool hasTagName(const QualifiedName&) const;
109 virtual String nodeName() const = 0;
110 virtual String nodeValue() const;
111 virtual void setNodeValue(const String&, ExceptionCode&);
112 virtual NodeType nodeType() const = 0;
parentNode()113 Node* parentNode() const { return parent(); }
114 Element* parentElement() const;
previousSibling()115 Node* previousSibling() const { return m_previous; }
nextSibling()116 Node* nextSibling() const { return m_next; }
117 PassRefPtr<NodeList> childNodes();
firstChild()118 Node* firstChild() const { return isContainerNode() ? containerFirstChild() : 0; }
lastChild()119 Node* lastChild() const { return isContainerNode() ? containerLastChild() : 0; }
120 bool hasAttributes() const;
121 NamedAttrMap* attributes() const;
122
123 virtual KURL baseURI() const;
124
125 void getSubresourceURLs(ListHashSet<KURL>&) const;
126
127 // These should all actually return a node, but this is only important for language bindings,
128 // which will already know and hold a ref on the right node to return. Returning bool allows
129 // these methods to be more efficient since they don't need to return a ref
130 virtual bool insertBefore(PassRefPtr<Node> newChild, Node* refChild, ExceptionCode&, bool shouldLazyAttach = false);
131 virtual bool replaceChild(PassRefPtr<Node> newChild, Node* oldChild, ExceptionCode&, bool shouldLazyAttach = false);
132 virtual bool removeChild(Node* child, ExceptionCode&);
133 virtual bool appendChild(PassRefPtr<Node> newChild, ExceptionCode&, bool shouldLazyAttach = false);
134
135 void remove(ExceptionCode&);
hasChildNodes()136 bool hasChildNodes() const { return firstChild(); }
137 virtual PassRefPtr<Node> cloneNode(bool deep) = 0;
localName()138 const AtomicString& localName() const { return virtualLocalName(); }
namespaceURI()139 const AtomicString& namespaceURI() const { return virtualNamespaceURI(); }
prefix()140 const AtomicString& prefix() const { return virtualPrefix(); }
141 virtual void setPrefix(const AtomicString&, ExceptionCode&);
142 void normalize();
143
isSameNode(Node * other)144 bool isSameNode(Node* other) const { return this == other; }
145 bool isEqualNode(Node*) const;
146 bool isDefaultNamespace(const AtomicString& namespaceURI) const;
147 String lookupPrefix(const AtomicString& namespaceURI) const;
148 String lookupNamespaceURI(const String& prefix) const;
149 String lookupNamespacePrefix(const AtomicString& namespaceURI, const Element* originalElement) const;
150
151 String textContent(bool convertBRsToNewlines = false) const;
152 void setTextContent(const String&, ExceptionCode&);
153
154 Node* lastDescendant() const;
155 Node* firstDescendant() const;
156
157 // Other methods (not part of DOM)
158
isElementNode()159 bool isElementNode() const { return m_isElement; }
isContainerNode()160 bool isContainerNode() const { return m_isContainer; }
isTextNode()161 bool isTextNode() const { return m_isText; }
162
isHTMLElement()163 virtual bool isHTMLElement() const { return false; }
164
165 #if ENABLE(SVG)
isSVGElement()166 virtual bool isSVGElement() const { return false; }
167 #else
isSVGElement()168 static bool isSVGElement() { return false; }
169 #endif
170
171 #if ENABLE(WML)
isWMLElement()172 virtual bool isWMLElement() const { return false; }
173 #else
isWMLElement()174 static bool isWMLElement() { return false; }
175 #endif
176
isStyledElement()177 virtual bool isStyledElement() const { return false; }
isFrameOwnerElement()178 virtual bool isFrameOwnerElement() const { return false; }
isAttributeNode()179 virtual bool isAttributeNode() const { return false; }
isCommentNode()180 virtual bool isCommentNode() const { return false; }
isCharacterDataNode()181 virtual bool isCharacterDataNode() const { return false; }
182 bool isDocumentNode() const;
isEventTargetNode()183 virtual bool isEventTargetNode() const { return false; }
isShadowNode()184 virtual bool isShadowNode() const { return false; }
shadowParentNode()185 virtual Node* shadowParentNode() { return 0; }
186 Node* shadowAncestorNode();
187 Node* shadowTreeRootNode();
188 bool isInShadowTree();
189
190 // The node's parent for the purpose of event capture and bubbling.
191 virtual ContainerNode* eventParentNode();
192
193 bool isBlockFlow() const;
194 bool isBlockFlowOrBlockTable() const;
195
196 // These low-level calls give the caller responsibility for maintaining the integrity of the tree.
setPreviousSibling(Node * previous)197 void setPreviousSibling(Node* previous) { m_previous = previous; }
setNextSibling(Node * next)198 void setNextSibling(Node* next) { m_next = next; }
199
200 // FIXME: These two functions belong in editing -- "atomic node" is an editing concept.
201 Node* previousNodeConsideringAtomicNodes() const;
202 Node* nextNodeConsideringAtomicNodes() const;
203
204 /** (Not part of the official DOM)
205 * Returns the next leaf node.
206 *
207 * Using this function delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
208 * @return next leaf node or 0 if there are no more.
209 */
210 Node* nextLeafNode() const;
211
212 /** (Not part of the official DOM)
213 * Returns the previous leaf node.
214 *
215 * Using this function delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
216 * @return previous leaf node or 0 if there are no more.
217 */
218 Node* previousLeafNode() const;
219
220 bool isEditableBlock() const;
221
222 // enclosingBlockFlowElement() is deprecated. Use enclosingBlock instead.
223 Element* enclosingBlockFlowElement() const;
224
225 Element* enclosingInlineElement() const;
226 Element* rootEditableElement() const;
227
228 bool inSameContainingBlockFlowElement(Node*);
229
230 // Used by the parser. Checks against the DTD, unlike DOM operations like appendChild().
231 // Also does not dispatch DOM mutation events.
232 // Returns the appropriate container node for future insertions as you parse, or 0 for failure.
233 virtual ContainerNode* addChild(PassRefPtr<Node>);
234
235 // Called by the parser when this element's close tag is reached,
236 // signalling that all child tags have been parsed and added.
237 // This is needed for <applet> and <object> elements, which can't lay themselves out
238 // until they know all of their nested <param>s. [Radar 3603191, 4040848].
239 // Also used for script elements and some SVG elements for similar purposes,
240 // but making parsing a special case in this respect should be avoided if possible.
finishParsingChildren()241 virtual void finishParsingChildren() { }
beginParsingChildren()242 virtual void beginParsingChildren() { }
243
244 // Called by the frame right before dispatching an unloadEvent. [Radar 4532113]
245 // This is needed for HTMLInputElements to tell the frame that it is done editing
246 // (sends textFieldDidEndEditing notification)
aboutToUnload()247 virtual void aboutToUnload() { }
248
249 // For <link> and <style> elements.
sheetLoaded()250 virtual bool sheetLoaded() { return true; }
251
hasID()252 bool hasID() const { return m_hasId; }
hasClass()253 bool hasClass() const { return m_hasClass; }
active()254 bool active() const { return m_active; }
inActiveChain()255 bool inActiveChain() const { return m_inActiveChain; }
inDetach()256 bool inDetach() const { return m_inDetach; }
hovered()257 bool hovered() const { return m_hovered; }
focused()258 bool focused() const { return hasRareData() ? rareDataFocused() : false; }
attached()259 bool attached() const { return m_attached; }
260 void setAttached(bool b = true) { m_attached = b; }
changed()261 bool changed() const { return m_styleChange != NoStyleChange; }
styleChangeType()262 StyleChangeType styleChangeType() const { return static_cast<StyleChangeType>(m_styleChange); }
hasChangedChild()263 bool hasChangedChild() const { return m_hasChangedChild; }
isLink()264 bool isLink() const { return m_isLink; }
265 void setHasID(bool b = true) { m_hasId = b; }
266 void setHasClass(bool b = true) { m_hasClass = b; }
267 void setHasChangedChild( bool b = true ) { m_hasChangedChild = b; }
268 void setInDocument(bool b = true) { m_inDocument = b; }
269 void setInActiveChain(bool b = true) { m_inActiveChain = b; }
270 void setChanged(StyleChangeType changeType = FullStyleChange);
271 void setIsLink(bool b = true) { m_isLink = b; }
272
inSubtreeMark()273 bool inSubtreeMark() const { return m_inSubtreeMark; }
274 void setInSubtreeMark(bool b = true) { m_inSubtreeMark = b; }
275
276 void lazyAttach();
277 virtual bool canLazyAttach();
278
279 virtual void setFocus(bool b = true);
280 virtual void setActive(bool b = true, bool /*pause*/ = false) { m_active = b; }
281 virtual void setHovered(bool b = true) { m_hovered = b; }
282
283 virtual short tabIndex() const;
284
285 /**
286 * Whether this node can receive the keyboard focus.
287 */
supportsFocus()288 virtual bool supportsFocus() const { return isFocusable(); }
289 virtual bool isFocusable() const;
290 virtual bool isKeyboardFocusable(KeyboardEvent*) const;
291 virtual bool isMouseFocusable() const;
292
isAutofilled()293 virtual bool isAutofilled() const { return false; }
isControl()294 virtual bool isControl() const { return false; } // Eventually the notion of what is a control will be extensible.
isEnabled()295 virtual bool isEnabled() const { return true; }
isChecked()296 virtual bool isChecked() const { return false; }
isIndeterminate()297 virtual bool isIndeterminate() const { return false; }
isReadOnlyControl()298 virtual bool isReadOnlyControl() const { return false; }
isTextControl()299 virtual bool isTextControl() const { return false; }
300
301 virtual bool isContentEditable() const;
302 virtual bool isContentRichlyEditable() const;
303 virtual bool shouldUseInputMethod() const;
304 virtual IntRect getRect() const;
305
306 virtual void recalcStyle(StyleChange = NoChange) { }
307
308 unsigned nodeIndex() const;
309
310 // Returns the DOM ownerDocument attribute. This method never returns NULL, except in the case
311 // of (1) a Document node or (2) a DocumentType node that is not used with any Document yet.
312 virtual Document* ownerDocument() const;
313
314 // Returns the document associated with this node. This method never returns NULL, except in the case
315 // of a DocumentType node that is not used with any Document yet. A Document node returns itself.
document()316 Document* document() const
317 {
318 ASSERT(this);
319 ASSERT(m_document || nodeType() == DOCUMENT_TYPE_NODE && !inDocument());
320 return m_document.get();
321 }
322 void setDocument(Document*);
323
324 // Returns true if this node is associated with a document and is in its associated document's
325 // node tree, false otherwise.
inDocument()326 bool inDocument() const
327 {
328 ASSERT(m_document || !m_inDocument);
329 return m_inDocument;
330 }
331
isReadOnlyNode()332 bool isReadOnlyNode() const { return nodeType() == ENTITY_REFERENCE_NODE; }
childTypeAllowed(NodeType)333 virtual bool childTypeAllowed(NodeType) { return false; }
childNodeCount()334 unsigned childNodeCount() const { return isContainerNode() ? containerChildNodeCount() : 0; }
childNode(unsigned index)335 Node* childNode(unsigned index) const { return isContainerNode() ? containerChildNode(index) : 0; }
336
337 /**
338 * Does a pre-order traversal of the tree to find the node next node after this one. This uses the same order that
339 * the tags appear in the source file.
340 *
341 * @param stayWithin If not null, the traversal will stop once the specified node is reached. This can be used to
342 * restrict traversal to a particular sub-tree.
343 *
344 * @return The next node, in document order
345 *
346 * see @ref traversePreviousNode()
347 */
348 Node* traverseNextNode(const Node* stayWithin = 0) const;
349
350 // Like traverseNextNode, but skips children and starts with the next sibling.
351 Node* traverseNextSibling(const Node* stayWithin = 0) const;
352
353 /**
354 * Does a reverse pre-order traversal to find the node that comes before the current one in document order
355 *
356 * see @ref traverseNextNode()
357 */
358 Node* traversePreviousNode(const Node * stayWithin = 0) const;
359
360 // Like traverseNextNode, but visits parents after their children.
361 Node* traverseNextNodePostOrder() const;
362
363 // Like traversePreviousNode, but visits parents before their children.
364 Node* traversePreviousNodePostOrder(const Node *stayWithin = 0) const;
365 Node* traversePreviousSiblingPostOrder(const Node *stayWithin = 0) const;
366
367 /**
368 * Finds previous or next editable leaf node.
369 */
370 Node* previousEditable() const;
371 Node* nextEditable() const;
372
renderer()373 RenderObject* renderer() const { return m_renderer; }
374 RenderObject* nextRenderer();
375 RenderObject* previousRenderer();
setRenderer(RenderObject * renderer)376 void setRenderer(RenderObject* renderer) { m_renderer = renderer; }
377
378 // Use with caution. Does no type checking. Mostly a convenience method for shadow nodes of form controls, where we know exactly
379 // what kind of renderer we made.
380 RenderBox* renderBox() const;
381
382 void checkSetPrefix(const AtomicString& prefix, ExceptionCode&);
383 bool isDescendantOf(const Node*) const;
384 bool contains(const Node*) const;
385
386 // These two methods are mutually exclusive. The former is used to do strict error-checking
387 // when adding children via the public DOM API (e.g., appendChild()). The latter is called only when parsing,
388 // to sanity-check against the DTD for error recovery.
389 void checkAddChild(Node* newChild, ExceptionCode&); // Error-checking when adding via the DOM API
390 virtual bool childAllowed(Node* newChild); // Error-checking during parsing that checks the DTD
391
392 void checkReplaceChild(Node* newChild, Node* oldChild, ExceptionCode&);
393 virtual bool canReplaceChild(Node* newChild, Node* oldChild);
394
395 // Used to determine whether range offsets use characters or node indices.
396 virtual bool offsetInCharacters() const;
397 // Number of DOM 16-bit units contained in node. Note that rendered text length can be different - e.g. because of
398 // css-transform:capitalize breaking up precomposed characters and ligatures.
399 virtual int maxCharacterOffset() const;
400
401 // FIXME: We should try to find a better location for these methods.
canSelectAll()402 virtual bool canSelectAll() const { return false; }
selectAll()403 virtual void selectAll() { }
404
405 // Whether or not a selection can be started in this object
406 virtual bool canStartSelection() const;
407
408 // -----------------------------------------------------------------------------
409 // Integration with rendering tree
410
411 /**
412 * Attaches this node to the rendering tree. This calculates the style to be applied to the node and creates an
413 * appropriate RenderObject which will be inserted into the tree (except when the style has display: none). This
414 * makes the node visible in the FrameView.
415 */
416 virtual void attach();
417
418 /**
419 * Detaches the node from the rendering tree, making it invisible in the rendered view. This method will remove
420 * the node's rendering object from the rendering tree and delete it.
421 */
422 virtual void detach();
423
424 virtual void willRemove();
425 void createRendererIfNeeded();
426 PassRefPtr<RenderStyle> styleForRenderer();
427 virtual bool rendererIsNeeded(RenderStyle*);
428 #if ENABLE(SVG)
childShouldCreateRenderer(Node *)429 virtual bool childShouldCreateRenderer(Node*) const { return true; }
430 #endif
431 virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
432
433 // Wrapper for nodes that don't have a renderer, but still cache the style (like HTMLOptionElement).
434 RenderStyle* renderStyle() const;
435 virtual void setRenderStyle(PassRefPtr<RenderStyle>);
436
437 virtual RenderStyle* computedStyle();
438
439 // -----------------------------------------------------------------------------
440 // Notification of document structure changes
441
442 /**
443 * Notifies the node that it has been inserted into the document. This is called during document parsing, and also
444 * when a node is added through the DOM methods insertBefore(), appendChild() or replaceChild(). Note that this only
445 * happens when the node becomes part of the document tree, i.e. only when the document is actually an ancestor of
446 * the node. The call happens _after_ the node has been added to the tree.
447 *
448 * This is similar to the DOMNodeInsertedIntoDocument DOM event, but does not require the overhead of event
449 * dispatching.
450 */
451 virtual void insertedIntoDocument();
452
453 /**
454 * Notifies the node that it is no longer part of the document tree, i.e. when the document is no longer an ancestor
455 * node.
456 *
457 * This is similar to the DOMNodeRemovedFromDocument DOM event, but does not require the overhead of event
458 * dispatching, and is called _after_ the node is removed from the tree.
459 */
460 virtual void removedFromDocument();
461
462 // These functions are called whenever you are connected or disconnected from a tree. That tree may be the main
463 // document tree, or it could be another disconnected tree. Override these functions to do any work that depends
464 // on connectedness to some ancestor (e.g., an ancestor <form> for example).
insertedIntoTree(bool)465 virtual void insertedIntoTree(bool /*deep*/) { }
removedFromTree(bool)466 virtual void removedFromTree(bool /*deep*/) { }
467
468 /**
469 * Notifies the node that it's list of children have changed (either by adding or removing child nodes), or a child
470 * node that is of the type CDATA_SECTION_NODE, TEXT_NODE or COMMENT_NODE has changed its value.
471 */
472 virtual void childrenChanged(bool /*changedByParser*/ = false, Node* /*beforeChange*/ = 0, Node* /*afterChange*/ = 0, int /*childCountDelta*/ = 0) { }
473
474 #if !defined(NDEBUG) || defined(ANDROID_DOM_LOGGING)
475 virtual void formatForDebugger(char* buffer, unsigned length) const;
476
477 void showNode(const char* prefix = "") const;
478 void showTreeForThis() const;
479 void showTreeAndMark(const Node* markedNode1, const char* markedLabel1, const Node* markedNode2 = 0, const char* markedLabel2 = 0) const;
480 #endif
481
482 void registerDynamicNodeList(DynamicNodeList*);
483 void unregisterDynamicNodeList(DynamicNodeList*);
484 void notifyNodeListsChildrenChanged();
485 void notifyLocalNodeListsChildrenChanged();
486 void notifyNodeListsAttributeChanged();
487 void notifyLocalNodeListsAttributeChanged();
488
489 PassRefPtr<NodeList> getElementsByTagName(const String&);
490 PassRefPtr<NodeList> getElementsByTagNameNS(const AtomicString& namespaceURI, const String& localName);
491 PassRefPtr<NodeList> getElementsByName(const String& elementName);
492 PassRefPtr<NodeList> getElementsByClassName(const String& classNames);
493
494 PassRefPtr<Element> querySelector(const String& selectors, ExceptionCode&);
495 PassRefPtr<NodeList> querySelectorAll(const String& selectors, ExceptionCode&);
496
497 unsigned short compareDocumentPosition(Node*);
498
499 #ifdef ANDROID_INSTRUMENT
500 // Overridden to prevent the normal new from being called.
501 void* operator new(size_t) throw();
502
503 // Overridden to prevent the normal delete from being called.
504 void operator delete(void*, size_t);
505
506 static size_t reportDOMNodesSize();
507 #endif
508
509 protected:
willMoveToNewOwnerDocument()510 virtual void willMoveToNewOwnerDocument() { }
didMoveToNewOwnerDocument()511 virtual void didMoveToNewOwnerDocument() { }
512
addSubresourceAttributeURLs(ListHashSet<KURL> &)513 virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const { }
514 void setTabIndexExplicitly(short);
515
hasRareData()516 bool hasRareData() const { return m_hasRareData; }
517
518 NodeRareData* rareData() const;
519 NodeRareData* ensureRareData();
520
521 private:
522 virtual NodeRareData* createRareData();
523 Node* containerChildNode(unsigned index) const;
524 unsigned containerChildNodeCount() const;
525 Node* containerFirstChild() const;
526 Node* containerLastChild() const;
527 bool rareDataFocused() const;
528
529 virtual RenderStyle* nonRendererRenderStyle() const;
530
531 virtual const AtomicString& virtualPrefix() const;
532 virtual const AtomicString& virtualLocalName() const;
533 virtual const AtomicString& virtualNamespaceURI() const;
534
535 Element* ancestorElement() const;
536
537 void appendTextContent(bool convertBRsToNewlines, StringBuilder&) const;
538
539 DocPtr<Document> m_document;
540 Node* m_previous;
541 Node* m_next;
542 RenderObject* m_renderer;
543
544 unsigned m_styleChange : 2;
545 bool m_hasId : 1;
546 bool m_hasClass : 1;
547 bool m_attached : 1;
548 bool m_hasChangedChild : 1;
549 bool m_inDocument : 1;
550 bool m_isLink : 1;
551 bool m_active : 1;
552 bool m_hovered : 1;
553 bool m_inActiveChain : 1;
554 bool m_inDetach : 1;
555 bool m_inSubtreeMark : 1;
556 bool m_hasRareData : 1;
557 const bool m_isElement : 1;
558 const bool m_isContainer : 1;
559 const bool m_isText : 1;
560
561 protected:
562 // These bits are used by the Element derived class, pulled up here so they can
563 // be stored in the same memory word as the Node bits above.
564 bool m_parsingChildrenFinished : 1;
565 #if ENABLE(SVG)
566 mutable bool m_areSVGAttributesValid : 1;
567 #endif
568
569 // These bits are used by the StyledElement derived class, and live here for the
570 // same reason as above.
571 mutable bool m_isStyleAttributeValid : 1;
572 mutable bool m_synchronizingStyleAttribute : 1;
573
574 #if ENABLE(SVG)
575 // This bit is used by the SVGElement derived class, and lives here for the same
576 // reason as above.
577 mutable bool m_synchronizingSVGAttributes : 1;
578 #endif
579
580 // 11 bits remaining
581 };
582
583 // Used in Node::addSubresourceAttributeURLs() and in addSubresourceStyleURLs()
addSubresourceURL(ListHashSet<KURL> & urls,const KURL & url)584 inline void addSubresourceURL(ListHashSet<KURL>& urls, const KURL& url)
585 {
586 if (!url.isNull())
587 urls.add(url);
588 }
589
590 } //namespace
591
592 #ifndef NDEBUG
593 // Outside the WebCore namespace for ease of invocation from gdb.
594 void showTree(const WebCore::Node*);
595 #endif
596
597 #endif
598