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, 2009 Apple Inc. All rights reserved.
6 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25 #ifndef Node_h
26 #define Node_h
27
28 #include "EventTarget.h"
29 #include "KURLHash.h"
30 #include "ScriptWrappable.h"
31 #include "TreeShared.h"
32 #include <wtf/ListHashSet.h>
33
34 namespace WebCore {
35
36 class AtomicString;
37 class Attribute;
38 class ContainerNode;
39 class Document;
40 class DynamicNodeList;
41 class Element;
42 class Event;
43 class EventListener;
44 class FloatPoint;
45 class Frame;
46 class IntRect;
47 class KeyboardEvent;
48 class NSResolver;
49 class NamedNodeMap;
50 class NodeList;
51 class NodeRareData;
52 class PlatformKeyboardEvent;
53 class PlatformMouseEvent;
54 class PlatformWheelEvent;
55 class QualifiedName;
56 class RegisteredEventListener;
57 class RenderArena;
58 class RenderBox;
59 class RenderBoxModelObject;
60 class RenderObject;
61 class RenderStyle;
62 class StringBuilder;
63
64 typedef int ExceptionCode;
65
66 // SyntheticStyleChange means that we need to go through the entire style change logic even though
67 // no style property has actually changed. It is used to restructure the tree when, for instance,
68 // RenderLayers are created or destroyed due to animation changes.
69 enum StyleChangeType { NoStyleChange, InlineStyleChange, FullStyleChange, SyntheticStyleChange };
70
71 const unsigned short DOCUMENT_POSITION_EQUIVALENT = 0x00;
72 const unsigned short DOCUMENT_POSITION_DISCONNECTED = 0x01;
73 const unsigned short DOCUMENT_POSITION_PRECEDING = 0x02;
74 const unsigned short DOCUMENT_POSITION_FOLLOWING = 0x04;
75 const unsigned short DOCUMENT_POSITION_CONTAINS = 0x08;
76 const unsigned short DOCUMENT_POSITION_CONTAINED_BY = 0x10;
77 const unsigned short DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;
78
79 // this class implements nodes, which can have a parent but no children:
80 class Node : public EventTarget, public TreeShared<Node>, public ScriptWrappable {
81 friend class Document;
82 public:
83 enum NodeType {
84 ELEMENT_NODE = 1,
85 ATTRIBUTE_NODE = 2,
86 TEXT_NODE = 3,
87 CDATA_SECTION_NODE = 4,
88 ENTITY_REFERENCE_NODE = 5,
89 ENTITY_NODE = 6,
90 PROCESSING_INSTRUCTION_NODE = 7,
91 COMMENT_NODE = 8,
92 DOCUMENT_NODE = 9,
93 DOCUMENT_TYPE_NODE = 10,
94 DOCUMENT_FRAGMENT_NODE = 11,
95 NOTATION_NODE = 12,
96 XPATH_NAMESPACE_NODE = 13
97 };
98
99 static bool isSupported(const String& feature, const String& version);
100
101 static void startIgnoringLeaks();
102 static void stopIgnoringLeaks();
103
104 static void dumpStatistics();
105
106 enum StyleChange { NoChange, NoInherit, Inherit, Detach, Force };
107 static StyleChange diff(const RenderStyle*, const RenderStyle*);
108
109 virtual ~Node();
110
111 // DOM methods & attributes for Node
112
113 bool hasTagName(const QualifiedName&) const;
114 virtual String nodeName() const = 0;
115 virtual String nodeValue() const;
116 virtual void setNodeValue(const String&, ExceptionCode&);
117 virtual NodeType nodeType() const = 0;
parentNode()118 Node* parentNode() const { return parent(); }
119 Element* parentElement() const;
previousSibling()120 Node* previousSibling() const { return m_previous; }
nextSibling()121 Node* nextSibling() const { return m_next; }
122 PassRefPtr<NodeList> childNodes();
firstChild()123 Node* firstChild() const { return isContainerNode() ? containerFirstChild() : 0; }
lastChild()124 Node* lastChild() const { return isContainerNode() ? containerLastChild() : 0; }
125 bool hasAttributes() const;
126 NamedNodeMap* attributes() const;
127
128 virtual KURL baseURI() const;
129
130 void getSubresourceURLs(ListHashSet<KURL>&) const;
131
132 // These should all actually return a node, but this is only important for language bindings,
133 // which will already know and hold a ref on the right node to return. Returning bool allows
134 // these methods to be more efficient since they don't need to return a ref
135 virtual bool insertBefore(PassRefPtr<Node> newChild, Node* refChild, ExceptionCode&, bool shouldLazyAttach = false);
136 virtual bool replaceChild(PassRefPtr<Node> newChild, Node* oldChild, ExceptionCode&, bool shouldLazyAttach = false);
137 virtual bool removeChild(Node* child, ExceptionCode&);
138 virtual bool appendChild(PassRefPtr<Node> newChild, ExceptionCode&, bool shouldLazyAttach = false);
139
140 void remove(ExceptionCode&);
hasChildNodes()141 bool hasChildNodes() const { return firstChild(); }
142 virtual PassRefPtr<Node> cloneNode(bool deep) = 0;
localName()143 const AtomicString& localName() const { return virtualLocalName(); }
namespaceURI()144 const AtomicString& namespaceURI() const { return virtualNamespaceURI(); }
prefix()145 const AtomicString& prefix() const { return virtualPrefix(); }
146 virtual void setPrefix(const AtomicString&, ExceptionCode&);
147 void normalize();
148
isSameNode(Node * other)149 bool isSameNode(Node* other) const { return this == other; }
150 bool isEqualNode(Node*) const;
151 bool isDefaultNamespace(const AtomicString& namespaceURI) const;
152 String lookupPrefix(const AtomicString& namespaceURI) const;
153 String lookupNamespaceURI(const String& prefix) const;
154 String lookupNamespacePrefix(const AtomicString& namespaceURI, const Element* originalElement) const;
155
156 String textContent(bool convertBRsToNewlines = false) const;
157 void setTextContent(const String&, ExceptionCode&);
158
159 Node* lastDescendant() const;
160 Node* firstDescendant() const;
161
162 // Other methods (not part of DOM)
163
isElementNode()164 bool isElementNode() const { return m_isElement; }
isContainerNode()165 bool isContainerNode() const { return m_isContainer; }
isTextNode()166 bool isTextNode() const { return m_isText; }
167
isHTMLElement()168 virtual bool isHTMLElement() const { return false; }
169
170 #if ENABLE(SVG)
isSVGElement()171 virtual bool isSVGElement() const { return false; }
172 #else
isSVGElement()173 static bool isSVGElement() { return false; }
174 #endif
175
176 #if ENABLE(WML)
isWMLElement()177 virtual bool isWMLElement() const { return false; }
178 #else
isWMLElement()179 static bool isWMLElement() { return false; }
180 #endif
181
182 #if ENABLE(MATHML)
isMathMLElement()183 virtual bool isMathMLElement() const { return false; }
184 #else
isMathMLElement()185 static bool isMathMLElement() { return false; }
186 #endif
187
188
isMediaControlElement()189 virtual bool isMediaControlElement() const { return false; }
isStyledElement()190 virtual bool isStyledElement() const { return false; }
isFrameOwnerElement()191 virtual bool isFrameOwnerElement() const { return false; }
isAttributeNode()192 virtual bool isAttributeNode() const { return false; }
isCommentNode()193 virtual bool isCommentNode() const { return false; }
isCharacterDataNode()194 virtual bool isCharacterDataNode() const { return false; }
195 bool isDocumentNode() const;
isShadowNode()196 virtual bool isShadowNode() const { return false; }
shadowParentNode()197 virtual Node* shadowParentNode() { return 0; }
198 Node* shadowAncestorNode();
199 Node* shadowTreeRootNode();
200 bool isInShadowTree();
201
202 // The node's parent for the purpose of event capture and bubbling.
203 virtual ContainerNode* eventParentNode();
204
205 // Returns the enclosing event parent node (or self) that, when clicked, would trigger a navigation.
206 Node* enclosingLinkEventParentOrSelf();
207
208 // Node ancestors when concerned about event flow
209 void eventAncestors(Vector<RefPtr<ContainerNode> > &ancestors);
210
211 bool isBlockFlow() const;
212 bool isBlockFlowOrBlockTable() const;
213
214 // These low-level calls give the caller responsibility for maintaining the integrity of the tree.
setPreviousSibling(Node * previous)215 void setPreviousSibling(Node* previous) { m_previous = previous; }
setNextSibling(Node * next)216 void setNextSibling(Node* next) { m_next = next; }
217
218 // FIXME: These two functions belong in editing -- "atomic node" is an editing concept.
219 Node* previousNodeConsideringAtomicNodes() const;
220 Node* nextNodeConsideringAtomicNodes() const;
221
222 /** (Not part of the official DOM)
223 * Returns the next leaf node.
224 *
225 * Using this function delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
226 * @return next leaf node or 0 if there are no more.
227 */
228 Node* nextLeafNode() const;
229
230 /** (Not part of the official DOM)
231 * Returns the previous leaf node.
232 *
233 * Using this function delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
234 * @return previous leaf node or 0 if there are no more.
235 */
236 Node* previousLeafNode() const;
237
238 bool isEditableBlock() const;
239
240 // enclosingBlockFlowElement() is deprecated. Use enclosingBlock instead.
241 Element* enclosingBlockFlowElement() const;
242
243 Element* enclosingInlineElement() const;
244 Element* rootEditableElement() const;
245
246 bool inSameContainingBlockFlowElement(Node*);
247
248 // Used by the parser. Checks against the DTD, unlike DOM operations like appendChild().
249 // Also does not dispatch DOM mutation events.
250 // Returns the appropriate container node for future insertions as you parse, or 0 for failure.
251 virtual ContainerNode* addChild(PassRefPtr<Node>);
252
253 // Called by the parser when this element's close tag is reached,
254 // signaling that all child tags have been parsed and added.
255 // This is needed for <applet> and <object> elements, which can't lay themselves out
256 // until they know all of their nested <param>s. [Radar 3603191, 4040848].
257 // Also used for script elements and some SVG elements for similar purposes,
258 // but making parsing a special case in this respect should be avoided if possible.
finishParsingChildren()259 virtual void finishParsingChildren() { }
beginParsingChildren()260 virtual void beginParsingChildren() { }
261
262 // Called by the frame right before dispatching an unloadEvent. [Radar 4532113]
263 // This is needed for HTMLInputElements to tell the frame that it is done editing
264 // (sends textFieldDidEndEditing notification)
aboutToUnload()265 virtual void aboutToUnload() { }
266
267 // For <link> and <style> elements.
sheetLoaded()268 virtual bool sheetLoaded() { return true; }
269
hasID()270 bool hasID() const { return m_hasId; }
hasClass()271 bool hasClass() const { return m_hasClass; }
active()272 bool active() const { return m_active; }
inActiveChain()273 bool inActiveChain() const { return m_inActiveChain; }
inDetach()274 bool inDetach() const { return m_inDetach; }
hovered()275 bool hovered() const { return m_hovered; }
focused()276 bool focused() const { return hasRareData() ? rareDataFocused() : false; }
attached()277 bool attached() const { return m_attached; }
278 void setAttached(bool b = true) { m_attached = b; }
needsStyleRecalc()279 bool needsStyleRecalc() const { return m_styleChange != NoStyleChange; }
styleChangeType()280 StyleChangeType styleChangeType() const { return static_cast<StyleChangeType>(m_styleChange); }
childNeedsStyleRecalc()281 bool childNeedsStyleRecalc() const { return m_childNeedsStyleRecalc; }
isLink()282 bool isLink() const { return m_isLink; }
283 void setHasID(bool b = true) { m_hasId = b; }
284 void setHasClass(bool b = true) { m_hasClass = b; }
285 void setChildNeedsStyleRecalc(bool b = true) { m_childNeedsStyleRecalc = b; }
286 void setInDocument(bool b = true) { m_inDocument = b; }
287 void setInActiveChain(bool b = true) { m_inActiveChain = b; }
288 void setNeedsStyleRecalc(StyleChangeType changeType = FullStyleChange);
289 void setIsLink(bool b = true) { m_isLink = b; }
290
291 void lazyAttach();
292 virtual bool canLazyAttach();
293
294 virtual void setFocus(bool b = true);
295 virtual void setActive(bool b = true, bool /*pause*/ = false) { m_active = b; }
296 virtual void setHovered(bool b = true) { m_hovered = b; }
297
298 virtual short tabIndex() const;
299
300 // Whether this kind of node can receive focus by default. Most nodes are
301 // not focusable but some elements, such as form controls and links are.
302 virtual bool supportsFocus() const;
303 // Whether the node can actually be focused.
304 virtual bool isFocusable() const;
305 virtual bool isKeyboardFocusable(KeyboardEvent*) const;
306 virtual bool isMouseFocusable() const;
307
308 virtual bool isContentEditable() const;
309 virtual bool isContentRichlyEditable() const;
310 virtual bool shouldUseInputMethod() const;
311 virtual IntRect getRect() const;
312
313 virtual void recalcStyle(StyleChange = NoChange) { }
314
315 unsigned nodeIndex() const;
316
317 // Returns the DOM ownerDocument attribute. This method never returns NULL, except in the case
318 // of (1) a Document node or (2) a DocumentType node that is not used with any Document yet.
319 virtual Document* ownerDocument() const;
320
321 // Returns the document associated with this node. This method never returns NULL, except in the case
322 // of a DocumentType node that is not used with any Document yet. A Document node returns itself.
document()323 Document* document() const
324 {
325 ASSERT(this);
326 ASSERT(m_document || (nodeType() == DOCUMENT_TYPE_NODE && !inDocument()));
327 return m_document;
328 }
329 void setDocument(Document*);
330
331 // Returns true if this node is associated with a document and is in its associated document's
332 // node tree, false otherwise.
inDocument()333 bool inDocument() const
334 {
335 ASSERT(m_document || !m_inDocument);
336 return m_inDocument;
337 }
338
isReadOnlyNode()339 bool isReadOnlyNode() const { return nodeType() == ENTITY_REFERENCE_NODE; }
childTypeAllowed(NodeType)340 virtual bool childTypeAllowed(NodeType) { return false; }
childNodeCount()341 unsigned childNodeCount() const { return isContainerNode() ? containerChildNodeCount() : 0; }
childNode(unsigned index)342 Node* childNode(unsigned index) const { return isContainerNode() ? containerChildNode(index) : 0; }
343
344 /**
345 * Does a pre-order traversal of the tree to find the node next node after this one. This uses the same order that
346 * the tags appear in the source file.
347 *
348 * @param stayWithin If not null, the traversal will stop once the specified node is reached. This can be used to
349 * restrict traversal to a particular sub-tree.
350 *
351 * @return The next node, in document order
352 *
353 * see @ref traversePreviousNode()
354 */
355 Node* traverseNextNode(const Node* stayWithin = 0) const;
356
357 // Like traverseNextNode, but skips children and starts with the next sibling.
358 Node* traverseNextSibling(const Node* stayWithin = 0) const;
359
360 /**
361 * Does a reverse pre-order traversal to find the node that comes before the current one in document order
362 *
363 * see @ref traverseNextNode()
364 */
365 Node* traversePreviousNode(const Node * stayWithin = 0) const;
366
367 // Like traverseNextNode, but visits parents after their children.
368 Node* traverseNextNodePostOrder() const;
369
370 // Like traversePreviousNode, but visits parents before their children.
371 Node* traversePreviousNodePostOrder(const Node *stayWithin = 0) const;
372 Node* traversePreviousSiblingPostOrder(const Node *stayWithin = 0) const;
373
374 /**
375 * Finds previous or next editable leaf node.
376 */
377 Node* previousEditable() const;
378 Node* nextEditable() const;
379
renderer()380 RenderObject* renderer() const { return m_renderer; }
381 RenderObject* nextRenderer();
382 RenderObject* previousRenderer();
setRenderer(RenderObject * renderer)383 void setRenderer(RenderObject* renderer) { m_renderer = renderer; }
384
385 // Use these two methods with caution.
386 RenderBox* renderBox() const;
387 RenderBoxModelObject* renderBoxModelObject() const;
388
389 void checkSetPrefix(const AtomicString& prefix, ExceptionCode&);
390 bool isDescendantOf(const Node*) const;
391 bool contains(const Node*) const;
392
393 // These two methods are mutually exclusive. The former is used to do strict error-checking
394 // when adding children via the public DOM API (e.g., appendChild()). The latter is called only when parsing,
395 // to sanity-check against the DTD for error recovery.
396 void checkAddChild(Node* newChild, ExceptionCode&); // Error-checking when adding via the DOM API
397 virtual bool childAllowed(Node* newChild); // Error-checking during parsing that checks the DTD
398
399 void checkReplaceChild(Node* newChild, Node* oldChild, ExceptionCode&);
400 virtual bool canReplaceChild(Node* newChild, Node* oldChild);
401
402 // Used to determine whether range offsets use characters or node indices.
403 virtual bool offsetInCharacters() const;
404 // Number of DOM 16-bit units contained in node. Note that rendered text length can be different - e.g. because of
405 // css-transform:capitalize breaking up precomposed characters and ligatures.
406 virtual int maxCharacterOffset() const;
407
408 // FIXME: We should try to find a better location for these methods.
canSelectAll()409 virtual bool canSelectAll() const { return false; }
selectAll()410 virtual void selectAll() { }
411
412 // Whether or not a selection can be started in this object
413 virtual bool canStartSelection() const;
414
415 // Getting points into and out of screen space
416 FloatPoint convertToPage(const FloatPoint& p) const;
417 FloatPoint convertFromPage(const FloatPoint& p) const;
418
419 // -----------------------------------------------------------------------------
420 // Integration with rendering tree
421
422 /**
423 * Attaches this node to the rendering tree. This calculates the style to be applied to the node and creates an
424 * appropriate RenderObject which will be inserted into the tree (except when the style has display: none). This
425 * makes the node visible in the FrameView.
426 */
427 virtual void attach();
428
429 /**
430 * Detaches the node from the rendering tree, making it invisible in the rendered view. This method will remove
431 * the node's rendering object from the rendering tree and delete it.
432 */
433 virtual void detach();
434
435 virtual void willRemove();
436 void createRendererIfNeeded();
437 PassRefPtr<RenderStyle> styleForRenderer();
438 virtual bool rendererIsNeeded(RenderStyle*);
439 #if ENABLE(SVG) || ENABLE(XHTMLMP)
childShouldCreateRenderer(Node *)440 virtual bool childShouldCreateRenderer(Node*) const { return true; }
441 #endif
442 virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
443
444 // Wrapper for nodes that don't have a renderer, but still cache the style (like HTMLOptionElement).
445 RenderStyle* renderStyle() const;
446 virtual void setRenderStyle(PassRefPtr<RenderStyle>);
447
448 virtual RenderStyle* computedStyle();
449
450 // -----------------------------------------------------------------------------
451 // Notification of document structure changes
452
453 /**
454 * Notifies the node that it has been inserted into the document. This is called during document parsing, and also
455 * when a node is added through the DOM methods insertBefore(), appendChild() or replaceChild(). Note that this only
456 * happens when the node becomes part of the document tree, i.e. only when the document is actually an ancestor of
457 * the node. The call happens _after_ the node has been added to the tree.
458 *
459 * This is similar to the DOMNodeInsertedIntoDocument DOM event, but does not require the overhead of event
460 * dispatching.
461 */
462 virtual void insertedIntoDocument();
463
464 /**
465 * Notifies the node that it is no longer part of the document tree, i.e. when the document is no longer an ancestor
466 * node.
467 *
468 * This is similar to the DOMNodeRemovedFromDocument DOM event, but does not require the overhead of event
469 * dispatching, and is called _after_ the node is removed from the tree.
470 */
471 virtual void removedFromDocument();
472
473 // These functions are called whenever you are connected or disconnected from a tree. That tree may be the main
474 // document tree, or it could be another disconnected tree. Override these functions to do any work that depends
475 // on connectedness to some ancestor (e.g., an ancestor <form> for example).
insertedIntoTree(bool)476 virtual void insertedIntoTree(bool /*deep*/) { }
removedFromTree(bool)477 virtual void removedFromTree(bool /*deep*/) { }
478
479 /**
480 * Notifies the node that it's list of children have changed (either by adding or removing child nodes), or a child
481 * node that is of the type CDATA_SECTION_NODE, TEXT_NODE or COMMENT_NODE has changed its value.
482 */
483 virtual void childrenChanged(bool /*changedByParser*/ = false, Node* /*beforeChange*/ = 0, Node* /*afterChange*/ = 0, int /*childCountDelta*/ = 0) { }
484
485 #if !defined(NDEBUG) || defined(ANDROID_DOM_LOGGING)
486 virtual void formatForDebugger(char* buffer, unsigned length) const;
487
488 void showNode(const char* prefix = "") const;
489 void showTreeForThis() const;
490 void showTreeAndMark(const Node* markedNode1, const char* markedLabel1, const Node* markedNode2 = 0, const char* markedLabel2 = 0) const;
491 #endif
492
493 void registerDynamicNodeList(DynamicNodeList*);
494 void unregisterDynamicNodeList(DynamicNodeList*);
495 void notifyNodeListsChildrenChanged();
496 void notifyLocalNodeListsChildrenChanged();
497 void notifyNodeListsAttributeChanged();
498 void notifyLocalNodeListsAttributeChanged();
499
500 PassRefPtr<NodeList> getElementsByTagName(const String&);
501 PassRefPtr<NodeList> getElementsByTagNameNS(const AtomicString& namespaceURI, const String& localName);
502 PassRefPtr<NodeList> getElementsByName(const String& elementName);
503 PassRefPtr<NodeList> getElementsByClassName(const String& classNames);
504
505 PassRefPtr<Element> querySelector(const String& selectors, ExceptionCode&);
506 PassRefPtr<NodeList> querySelectorAll(const String& selectors, ExceptionCode&);
507
508 unsigned short compareDocumentPosition(Node*);
509
510 #ifdef ANDROID_INSTRUMENT
511 // Overridden to prevent the normal new from being called.
512 void* operator new(size_t size);
513 void* operator new[](size_t size);
514
515 // Overridden to prevent the normal delete from being called.
516 void operator delete(void* p, size_t size);
517 void operator delete[](void* p, size_t size);
518
519 static size_t reportDOMNodesSize();
520 #endif
521
toNode()522 virtual Node* toNode() { return this; }
523
524 virtual ScriptExecutionContext* scriptExecutionContext() const;
525
526 virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture);
527 virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture);
528
529 // Handlers to do/undo actions on the target node before an event is dispatched to it and after the event
530 // has been dispatched. The data pointer is handed back by the preDispatch and passed to postDispatch.
preDispatchEventHandler(Event *)531 virtual void* preDispatchEventHandler(Event*) { return 0; }
postDispatchEventHandler(Event *,void *)532 virtual void postDispatchEventHandler(Event*, void* /*dataFromPreDispatch*/) { }
533
534 using EventTarget::dispatchEvent;
535 virtual bool dispatchEvent(PassRefPtr<Event>);
536
537 bool dispatchGenericEvent(PassRefPtr<Event>);
538 virtual void handleLocalEvents(Event*);
539
540 void dispatchSubtreeModifiedEvent();
541 void dispatchUIEvent(const AtomicString& eventType, int detail, PassRefPtr<Event> underlyingEvent);
542 bool dispatchKeyEvent(const PlatformKeyboardEvent&);
543 void dispatchWheelEvent(PlatformWheelEvent&);
544 bool dispatchMouseEvent(const PlatformMouseEvent&, const AtomicString& eventType,
545 int clickCount = 0, Node* relatedTarget = 0);
546 bool dispatchMouseEvent(const AtomicString& eventType, int button, int clickCount,
547 int pageX, int pageY, int screenX, int screenY,
548 bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
549 bool isSimulated, Node* relatedTarget, PassRefPtr<Event> underlyingEvent);
550 void dispatchSimulatedMouseEvent(const AtomicString& eventType, PassRefPtr<Event> underlyingEvent);
551 void dispatchSimulatedClick(PassRefPtr<Event> underlyingEvent, bool sendMouseEvents = false, bool showPressedLook = true);
552
553 virtual void dispatchFocusEvent();
554 virtual void dispatchBlurEvent();
555
556 /**
557 * Perform the default action for an event e.g. submitting a form
558 */
559 virtual void defaultEventHandler(Event*);
560
561 /**
562 * Used for disabled form elements; if true, prevents mouse events from being dispatched
563 * to event listeners, and prevents DOMActivate events from being sent at all.
564 */
565 virtual bool disabled() const;
566
567 using TreeShared<Node>::ref;
568 using TreeShared<Node>::deref;
569
570 virtual EventTargetData* eventTargetData();
571 virtual EventTargetData* ensureEventTargetData();
572
573 protected:
574 // CreateElementZeroRefCount is deprecated and can be removed once we convert all element
575 // classes to start with a reference count of 1.
576 enum ConstructionType { CreateContainer, CreateElement, CreateOther, CreateText, CreateElementZeroRefCount };
577 Node(Document*, ConstructionType);
578
579 virtual void willMoveToNewOwnerDocument();
580 virtual void didMoveToNewOwnerDocument();
581
addSubresourceAttributeURLs(ListHashSet<KURL> &)582 virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const { }
583 void setTabIndexExplicitly(short);
584
hasRareData()585 bool hasRareData() const { return m_hasRareData; }
586 #if ENABLE(SVG)
hasRareSVGData()587 bool hasRareSVGData() const { return m_hasRareSVGData; }
588 #endif
589
590 NodeRareData* rareData() const;
591 NodeRareData* ensureRareData();
592
593 private:
594 static bool initialRefCount(ConstructionType);
595 static bool isContainer(ConstructionType);
596 static bool isElement(ConstructionType);
597 static bool isText(ConstructionType);
598
refEventTarget()599 virtual void refEventTarget() { ref(); }
derefEventTarget()600 virtual void derefEventTarget() { deref(); }
601
602 void removeAllEventListenersSlowCase();
603
604 virtual NodeRareData* createRareData();
605 Node* containerChildNode(unsigned index) const;
606 unsigned containerChildNodeCount() const;
607 Node* containerFirstChild() const;
608 Node* containerLastChild() const;
609 bool rareDataFocused() const;
610
611 virtual RenderStyle* nonRendererRenderStyle() const;
612
613 virtual const AtomicString& virtualPrefix() const;
614 virtual const AtomicString& virtualLocalName() const;
615 virtual const AtomicString& virtualNamespaceURI() const;
616
617 Element* ancestorElement() const;
618
619 void appendTextContent(bool convertBRsToNewlines, StringBuilder&) const;
620
621 Document* m_document;
622 Node* m_previous;
623 Node* m_next;
624 RenderObject* m_renderer;
625
626 unsigned m_styleChange : 2;
627 bool m_hasId : 1;
628 bool m_hasClass : 1;
629 bool m_attached : 1;
630 bool m_childNeedsStyleRecalc : 1;
631 bool m_inDocument : 1;
632 bool m_isLink : 1;
633 bool m_active : 1;
634 bool m_hovered : 1;
635 bool m_inActiveChain : 1;
636 bool m_inDetach : 1;
637 bool m_hasRareData : 1;
638 const bool m_isElement : 1;
639 const bool m_isContainer : 1;
640 const bool m_isText : 1;
641
642 protected:
643 // These bits are used by derived classes, pulled up here so they can
644 // be stored in the same memory word as the Node bits above.
645
646 bool m_parsingChildrenFinished : 1; // Element
647 mutable bool m_isStyleAttributeValid : 1; // StyledElement
648 mutable bool m_synchronizingStyleAttribute : 1; // StyledElement
649
650 #if ENABLE(SVG)
651 mutable bool m_areSVGAttributesValid : 1; // Element
652 mutable bool m_synchronizingSVGAttributes : 1; // SVGElement
653 bool m_hasRareSVGData : 1; // SVGElement
654 #endif
655
656 // 10 bits remaining
657 };
658
659 // Used in Node::addSubresourceAttributeURLs() and in addSubresourceStyleURLs()
addSubresourceURL(ListHashSet<KURL> & urls,const KURL & url)660 inline void addSubresourceURL(ListHashSet<KURL>& urls, const KURL& url)
661 {
662 if (!url.isNull())
663 urls.add(url);
664 }
665
666 } //namespace
667
668 #ifndef NDEBUG
669 // Outside the WebCore namespace for ease of invocation from gdb.
670 void showTree(const WebCore::Node*);
671 #endif
672
673 #endif
674