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, 2010, 2011 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 "RenderStyleConstants.h"
31 #include "ScriptWrappable.h"
32 #include "TreeShared.h"
33 #include <wtf/Forward.h>
34 #include <wtf/ListHashSet.h>
35
36 #if USE(JSC)
37 namespace JSC {
38 class JSGlobalData;
39 class MarkStack;
40 }
41 #endif
42
43 namespace WebCore {
44
45 class Attribute;
46 class ClassNodeList;
47 class ContainerNode;
48 class Document;
49 class DynamicNodeList;
50 class Element;
51 class Event;
52 class EventContext;
53 class EventListener;
54 class FloatPoint;
55 class Frame;
56 class InputElement;
57 class IntRect;
58 class KeyboardEvent;
59 class NSResolver;
60 class NamedNodeMap;
61 class NameNodeList;
62 class NodeList;
63 class NodeRareData;
64 class PlatformKeyboardEvent;
65 class PlatformMouseEvent;
66 class PlatformWheelEvent;
67 class QualifiedName;
68 class RegisteredEventListener;
69 class RenderArena;
70 class RenderBox;
71 class RenderBoxModelObject;
72 class RenderObject;
73 class RenderStyle;
74 #if ENABLE(SVG)
75 class SVGUseElement;
76 #endif
77 class TagNodeList;
78 class TreeScope;
79
80 typedef int ExceptionCode;
81
82 const int nodeStyleChangeShift = 25;
83
84 // SyntheticStyleChange means that we need to go through the entire style change logic even though
85 // no style property has actually changed. It is used to restructure the tree when, for instance,
86 // RenderLayers are created or destroyed due to animation changes.
87 enum StyleChangeType {
88 NoStyleChange = 0,
89 InlineStyleChange = 1 << nodeStyleChangeShift,
90 FullStyleChange = 2 << nodeStyleChangeShift,
91 SyntheticStyleChange = 3 << nodeStyleChangeShift
92 };
93
94 class Node : public EventTarget, public TreeShared<ContainerNode>, public ScriptWrappable {
95 friend class Document;
96 friend class TreeScope;
97
98 public:
99 enum NodeType {
100 ELEMENT_NODE = 1,
101 ATTRIBUTE_NODE = 2,
102 TEXT_NODE = 3,
103 CDATA_SECTION_NODE = 4,
104 ENTITY_REFERENCE_NODE = 5,
105 ENTITY_NODE = 6,
106 PROCESSING_INSTRUCTION_NODE = 7,
107 COMMENT_NODE = 8,
108 DOCUMENT_NODE = 9,
109 DOCUMENT_TYPE_NODE = 10,
110 DOCUMENT_FRAGMENT_NODE = 11,
111 NOTATION_NODE = 12,
112 XPATH_NAMESPACE_NODE = 13
113 };
114 enum DocumentPosition {
115 DOCUMENT_POSITION_EQUIVALENT = 0x00,
116 DOCUMENT_POSITION_DISCONNECTED = 0x01,
117 DOCUMENT_POSITION_PRECEDING = 0x02,
118 DOCUMENT_POSITION_FOLLOWING = 0x04,
119 DOCUMENT_POSITION_CONTAINS = 0x08,
120 DOCUMENT_POSITION_CONTAINED_BY = 0x10,
121 DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20,
122 };
123
124 static bool isSupported(const String& feature, const String& version);
125
126 static void startIgnoringLeaks();
127 static void stopIgnoringLeaks();
128
129 static void dumpStatistics();
130
131 enum StyleChange { NoChange, NoInherit, Inherit, Detach, Force };
132 static StyleChange diff(const RenderStyle*, const RenderStyle*);
133
134 virtual ~Node();
135
136 // DOM methods & attributes for Node
137
138 bool hasTagName(const QualifiedName&) const;
139 bool hasLocalName(const AtomicString&) const;
140 virtual String nodeName() const = 0;
141 virtual String nodeValue() const;
142 virtual void setNodeValue(const String&, ExceptionCode&);
143 virtual NodeType nodeType() const = 0;
144 ContainerNode* parentNode() const;
145 Element* parentElement() const;
previousSibling()146 Node* previousSibling() const { return m_previous; }
nextSibling()147 Node* nextSibling() const { return m_next; }
148 PassRefPtr<NodeList> childNodes();
149 Node* firstChild() const;
150 Node* lastChild() const;
151 bool hasAttributes() const;
152 NamedNodeMap* attributes() const;
153
154 virtual KURL baseURI() const;
155
156 void getSubresourceURLs(ListHashSet<KURL>&) const;
157
158 // These should all actually return a node, but this is only important for language bindings,
159 // which will already know and hold a ref on the right node to return. Returning bool allows
160 // these methods to be more efficient since they don't need to return a ref
161 bool insertBefore(PassRefPtr<Node> newChild, Node* refChild, ExceptionCode&, bool shouldLazyAttach = false);
162 bool replaceChild(PassRefPtr<Node> newChild, Node* oldChild, ExceptionCode&, bool shouldLazyAttach = false);
163 bool removeChild(Node* child, ExceptionCode&);
164 bool appendChild(PassRefPtr<Node> newChild, ExceptionCode&, bool shouldLazyAttach = false);
165
166 void remove(ExceptionCode&);
hasChildNodes()167 bool hasChildNodes() const { return firstChild(); }
168 virtual PassRefPtr<Node> cloneNode(bool deep) = 0;
localName()169 const AtomicString& localName() const { return virtualLocalName(); }
namespaceURI()170 const AtomicString& namespaceURI() const { return virtualNamespaceURI(); }
prefix()171 const AtomicString& prefix() const { return virtualPrefix(); }
172 virtual void setPrefix(const AtomicString&, ExceptionCode&);
173 void normalize();
174
isSameNode(Node * other)175 bool isSameNode(Node* other) const { return this == other; }
176 bool isEqualNode(Node*) const;
177 bool isDefaultNamespace(const AtomicString& namespaceURI) const;
178 String lookupPrefix(const AtomicString& namespaceURI) const;
179 String lookupNamespaceURI(const String& prefix) const;
180 String lookupNamespacePrefix(const AtomicString& namespaceURI, const Element* originalElement) const;
181
182 String textContent(bool convertBRsToNewlines = false) const;
183 void setTextContent(const String&, ExceptionCode&);
184
185 Node* lastDescendant() const;
186 Node* firstDescendant() const;
187
188 // Other methods (not part of DOM)
189
isElementNode()190 bool isElementNode() const { return getFlag(IsElementFlag); }
isContainerNode()191 bool isContainerNode() const { return getFlag(IsContainerFlag); }
isTextNode()192 bool isTextNode() const { return getFlag(IsTextFlag); }
193
isHTMLElement()194 bool isHTMLElement() const { return getFlag(IsHTMLFlag); }
195
isSVGElement()196 bool isSVGElement() const { return getFlag(IsSVGFlag); }
isSVGShadowRoot()197 virtual bool isSVGShadowRoot() const { return false; }
198 #if ENABLE(SVG)
199 SVGUseElement* svgShadowHost() const;
200 #endif
201
202 #if ENABLE(WML)
isWMLElement()203 virtual bool isWMLElement() const { return false; }
204 #else
isWMLElement()205 static bool isWMLElement() { return false; }
206 #endif
207
isMediaControlElement()208 virtual bool isMediaControlElement() const { return false; }
isMediaControls()209 virtual bool isMediaControls() const { return false; }
isStyledElement()210 bool isStyledElement() const { return getFlag(IsStyledElementFlag); }
isFrameOwnerElement()211 virtual bool isFrameOwnerElement() const { return false; }
isAttributeNode()212 virtual bool isAttributeNode() const { return false; }
isCommentNode()213 bool isCommentNode() const { return getFlag(IsCommentFlag); }
isCharacterDataNode()214 virtual bool isCharacterDataNode() const { return false; }
215 bool isDocumentNode() const;
isShadowRoot()216 bool isShadowRoot() const { return getFlag(IsShadowRootFlag); }
217 // FIXME: Remove this when all shadow roots are ShadowRoots.
isShadowBoundary()218 virtual bool isShadowBoundary() const { return false; }
canHaveLightChildRendererWithShadow()219 virtual bool canHaveLightChildRendererWithShadow() const { return false; }
220
221 Node* shadowAncestorNode() const;
222 Node* shadowTreeRootNode() const;
223 bool isInShadowTree();
224 // Node's parent, shadow tree host, or SVG use.
225 ContainerNode* parentOrHostNode() const;
226 // Use when it's guaranteed to that shadowHost is 0 and svgShadowHost is 0.
227 ContainerNode* parentNodeGuaranteedHostFree() const;
228
229 Element* shadowHost() const;
230 void setShadowHost(Element*);
231
selfOrAncestorHasDirAutoAttribute()232 bool selfOrAncestorHasDirAutoAttribute() const { return getFlag(SelfOrAncestorHasDirAutoFlag); }
setSelfOrAncestorHasDirAutoAttribute(bool flag)233 void setSelfOrAncestorHasDirAutoAttribute(bool flag) { setFlag(flag, SelfOrAncestorHasDirAutoFlag); }
234
235 // Returns the enclosing event parent node (or self) that, when clicked, would trigger a navigation.
236 Node* enclosingLinkEventParentOrSelf();
237
238 bool isBlockFlow() const;
239 bool isBlockFlowOrBlockTable() const;
240
241 // These low-level calls give the caller responsibility for maintaining the integrity of the tree.
setPreviousSibling(Node * previous)242 void setPreviousSibling(Node* previous) { m_previous = previous; }
setNextSibling(Node * next)243 void setNextSibling(Node* next) { m_next = next; }
244
245 // FIXME: These two functions belong in editing -- "atomic node" is an editing concept.
246 Node* previousNodeConsideringAtomicNodes() const;
247 Node* nextNodeConsideringAtomicNodes() const;
248
249 // Returns the next leaf node or 0 if there are no more.
250 // Delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
251 // Uses an editing-specific concept of what a leaf node is, and should probably be moved
252 // out of the Node class into an editing-specific source file.
253 Node* nextLeafNode() const;
254
255 // Returns the previous leaf node or 0 if there are no more.
256 // Delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
257 // Uses an editing-specific concept of what a leaf node is, and should probably be moved
258 // out of the Node class into an editing-specific source file.
259 Node* previousLeafNode() const;
260
261 // enclosingBlockFlowElement() is deprecated. Use enclosingBlock instead.
262 Element* enclosingBlockFlowElement() const;
263
264 Element* rootEditableElement() const;
265
266 bool inSameContainingBlockFlowElement(Node*);
267
268 // FIXME: All callers of this function are almost certainly wrong!
269 virtual void deprecatedParserAddChild(PassRefPtr<Node>);
270
271 // Called by the parser when this element's close tag is reached,
272 // signaling that all child tags have been parsed and added.
273 // This is needed for <applet> and <object> elements, which can't lay themselves out
274 // until they know all of their nested <param>s. [Radar 3603191, 4040848].
275 // Also used for script elements and some SVG elements for similar purposes,
276 // but making parsing a special case in this respect should be avoided if possible.
finishParsingChildren()277 virtual void finishParsingChildren() { }
beginParsingChildren()278 virtual void beginParsingChildren() { }
279
280 // Called on the focused node right before dispatching an unload event.
aboutToUnload()281 virtual void aboutToUnload() { }
282
283 // For <link> and <style> elements.
sheetLoaded()284 virtual bool sheetLoaded() { return true; }
285
hasID()286 bool hasID() const { return getFlag(HasIDFlag); }
hasClass()287 bool hasClass() const { return getFlag(HasClassFlag); }
active()288 bool active() const { return getFlag(IsActiveFlag); }
inActiveChain()289 bool inActiveChain() const { return getFlag(InActiveChainFlag); }
inDetach()290 bool inDetach() const { return getFlag(InDetachFlag); }
hovered()291 bool hovered() const { return getFlag(IsHoveredFlag); }
focused()292 bool focused() const { return hasRareData() ? rareDataFocused() : false; }
attached()293 bool attached() const { return getFlag(IsAttachedFlag); }
setAttached()294 void setAttached() { setFlag(IsAttachedFlag); }
needsStyleRecalc()295 bool needsStyleRecalc() const { return styleChangeType() != NoStyleChange; }
styleChangeType()296 StyleChangeType styleChangeType() const { return static_cast<StyleChangeType>(m_nodeFlags & StyleChangeMask); }
childNeedsStyleRecalc()297 bool childNeedsStyleRecalc() const { return getFlag(ChildNeedsStyleRecalcFlag); }
isLink()298 bool isLink() const { return getFlag(IsLinkFlag); }
299
setHasID(bool f)300 void setHasID(bool f) { setFlag(f, HasIDFlag); }
setHasClass(bool f)301 void setHasClass(bool f) { setFlag(f, HasClassFlag); }
setChildNeedsStyleRecalc()302 void setChildNeedsStyleRecalc() { setFlag(ChildNeedsStyleRecalcFlag); }
clearChildNeedsStyleRecalc()303 void clearChildNeedsStyleRecalc() { clearFlag(ChildNeedsStyleRecalcFlag); }
setInDocument()304 void setInDocument() { setFlag(InDocumentFlag); }
clearInDocument()305 void clearInDocument() { clearFlag(InDocumentFlag); }
306
setInActiveChain()307 void setInActiveChain() { setFlag(InActiveChainFlag); }
clearInActiveChain()308 void clearInActiveChain() { clearFlag(InActiveChainFlag); }
309
310 void setNeedsStyleRecalc(StyleChangeType changeType = FullStyleChange);
clearNeedsStyleRecalc()311 void clearNeedsStyleRecalc() { m_nodeFlags &= ~StyleChangeMask; }
312
setIsLink(bool f)313 void setIsLink(bool f) { setFlag(f, IsLinkFlag); }
setIsLink()314 void setIsLink() { setFlag(IsLinkFlag); }
clearIsLink()315 void clearIsLink() { clearFlag(IsLinkFlag); }
316
317 enum ShouldSetAttached {
318 SetAttached,
319 DoNotSetAttached
320 };
321 void lazyAttach(ShouldSetAttached = SetAttached);
322
323 virtual void setFocus(bool = true);
324 virtual void setActive(bool f = true, bool /*pause*/ = false) { setFlag(f, IsActiveFlag); }
325 virtual void setHovered(bool f = true) { setFlag(f, IsHoveredFlag); }
326
327 virtual short tabIndex() const;
328
329 // Whether this kind of node can receive focus by default. Most nodes are
330 // not focusable but some elements, such as form controls and links, are.
331 virtual bool supportsFocus() const;
332 // Whether the node can actually be focused.
333 virtual bool isFocusable() const;
334 virtual bool isKeyboardFocusable(KeyboardEvent*) const;
335 virtual bool isMouseFocusable() const;
336
337 bool isContentEditable() const;
338
rendererIsEditable()339 bool rendererIsEditable() const { return rendererIsEditable(Editable); }
rendererIsRichlyEditable()340 bool rendererIsRichlyEditable() const { return rendererIsEditable(RichlyEditable); }
341 virtual bool shouldUseInputMethod() const;
342 virtual IntRect getRect() const;
343 IntRect renderRect(bool* isReplaced);
344
345 // Returns true if the node has a non-empty bounding box in layout.
346 // This does not 100% guarantee the user can see it, but is pretty close.
347 // Note: This method only works properly after layout has occurred.
348 bool hasNonEmptyBoundingBox() const;
349
350 virtual void recalcStyle(StyleChange = NoChange) { }
351
352 unsigned nodeIndex() const;
353
354 // Returns the DOM ownerDocument attribute. This method never returns NULL, except in the case
355 // of (1) a Document node or (2) a DocumentType node that is not used with any Document yet.
356 virtual Document* ownerDocument() const;
357
358 // Returns the document associated with this node. This method never returns NULL, except in the case
359 // of a DocumentType node that is not used with any Document yet. A Document node returns itself.
document()360 Document* document() const
361 {
362 ASSERT(this);
363 ASSERT(m_document || (nodeType() == DOCUMENT_TYPE_NODE && !inDocument()));
364 return m_document;
365 }
366
367 TreeScope* treeScope() const;
368
369 // Do not use this method to change the scope of a node until after the node has been
370 // removed from its previous scope. Do not use to change documents.
371 void setTreeScope(TreeScope*);
372
373 // Used by the basic DOM methods (e.g., appendChild()).
374 void setTreeScopeRecursively(TreeScope*);
375
376 // Returns true if this node is associated with a document and is in its associated document's
377 // node tree, false otherwise.
inDocument()378 bool inDocument() const
379 {
380 ASSERT(m_document || !getFlag(InDocumentFlag));
381 return getFlag(InDocumentFlag);
382 }
383
isReadOnlyNode()384 bool isReadOnlyNode() const { return nodeType() == ENTITY_REFERENCE_NODE; }
childTypeAllowed(NodeType)385 virtual bool childTypeAllowed(NodeType) const { return false; }
386 unsigned childNodeCount() const;
387 Node* childNode(unsigned index) const;
388
389 // Does a pre-order traversal of the tree to find the next node after this one.
390 // This uses the same order that tags appear in the source file. If the stayWithin
391 // argument is non-null, the traversal will stop once the specified node is reached.
392 // This can be used to restrict traversal to a particular sub-tree.
393 Node* traverseNextNode(const Node* stayWithin = 0) const;
394
395 // Like traverseNextNode, but skips children and starts with the next sibling.
396 Node* traverseNextSibling(const Node* stayWithin = 0) const;
397
398 // Does a reverse pre-order traversal to find the node that comes before the current one in document order
399 Node* traversePreviousNode(const Node* stayWithin = 0) const;
400
401 // Like traverseNextNode, but visits parents after their children.
402 Node* traverseNextNodePostOrder() const;
403
404 // Like traversePreviousNode, but visits parents before their children.
405 Node* traversePreviousNodePostOrder(const Node* stayWithin = 0) const;
406 Node* traversePreviousSiblingPostOrder(const Node* stayWithin = 0) const;
407
408 void checkSetPrefix(const AtomicString& prefix, ExceptionCode&);
409 bool isDescendantOf(const Node*) const;
410 bool contains(const Node*) const;
411 bool containsIncludingShadowDOM(Node*);
412
413 // This method is used to do strict error-checking when adding children via
414 // the public DOM API (e.g., appendChild()).
415 void checkAddChild(Node* newChild, ExceptionCode&); // Error-checking when adding via the DOM API
416
417 void checkReplaceChild(Node* newChild, Node* oldChild, ExceptionCode&);
418 virtual bool canReplaceChild(Node* newChild, Node* oldChild);
419
420 // Used to determine whether range offsets use characters or node indices.
421 virtual bool offsetInCharacters() const;
422 // Number of DOM 16-bit units contained in node. Note that rendered text length can be different - e.g. because of
423 // css-transform:capitalize breaking up precomposed characters and ligatures.
424 virtual int maxCharacterOffset() const;
425
426 // FIXME: We should try to find a better location for these methods.
canSelectAll()427 virtual bool canSelectAll() const { return false; }
selectAll()428 virtual void selectAll() { }
429
430 // Whether or not a selection can be started in this object
431 virtual bool canStartSelection() const;
432
433 // Getting points into and out of screen space
434 FloatPoint convertToPage(const FloatPoint&) const;
435 FloatPoint convertFromPage(const FloatPoint&) const;
436
437 // -----------------------------------------------------------------------------
438 // Integration with rendering tree
439
renderer()440 RenderObject* renderer() const { return m_renderer; }
441 RenderObject* nextRenderer();
442 RenderObject* previousRenderer();
setRenderer(RenderObject * renderer)443 void setRenderer(RenderObject* renderer) { m_renderer = renderer; }
444
445 // Use these two methods with caution.
446 RenderBox* renderBox() const;
447 RenderBoxModelObject* renderBoxModelObject() const;
448
449 // Attaches this node to the rendering tree. This calculates the style to be applied to the node and creates an
450 // appropriate RenderObject which will be inserted into the tree (except when the style has display: none). This
451 // makes the node visible in the FrameView.
452 virtual void attach();
453
454 // Detaches the node from the rendering tree, making it invisible in the rendered view. This method will remove
455 // the node's rendering object from the rendering tree and delete it.
456 virtual void detach();
457
458 virtual void willRemove();
459 void createRendererIfNeeded();
460 PassRefPtr<RenderStyle> styleForRenderer();
461 virtual bool rendererIsNeeded(RenderStyle*);
childShouldCreateRenderer(Node *)462 virtual bool childShouldCreateRenderer(Node*) const { return true; }
463 virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
464 ContainerNode* parentNodeForRenderingAndStyle() const;
465
466 // Wrapper for nodes that don't have a renderer, but still cache the style (like HTMLOptionElement).
467 RenderStyle* renderStyle() const;
468 virtual void setRenderStyle(PassRefPtr<RenderStyle>);
469
470 RenderStyle* computedStyle(PseudoId pseudoElementSpecifier = NOPSEUDO) { return virtualComputedStyle(pseudoElementSpecifier); }
471
472 // -----------------------------------------------------------------------------
473 // Notification of document structure changes
474
475 // Notifies the node that it has been inserted into the document. This is called during document parsing, and also
476 // when a node is added through the DOM methods insertBefore(), appendChild() or replaceChild(). Note that this only
477 // happens when the node becomes part of the document tree, i.e. only when the document is actually an ancestor of
478 // the node. The call happens _after_ the node has been added to the tree.
479 //
480 // This is similar to the DOMNodeInsertedIntoDocument DOM event, but does not require the overhead of event
481 // dispatching.
482 virtual void insertedIntoDocument();
483
484 // Notifies the node that it is no longer part of the document tree, i.e. when the document is no longer an ancestor
485 // node.
486 //
487 // This is similar to the DOMNodeRemovedFromDocument DOM event, but does not require the overhead of event
488 // dispatching, and is called _after_ the node is removed from the tree.
489 virtual void removedFromDocument();
490
491 // These functions are called whenever you are connected or disconnected from a tree. That tree may be the main
492 // document tree, or it could be another disconnected tree. Override these functions to do any work that depends
493 // on connectedness to some ancestor (e.g., an ancestor <form> for example).
insertedIntoTree(bool)494 virtual void insertedIntoTree(bool /*deep*/) { }
removedFromTree(bool)495 virtual void removedFromTree(bool /*deep*/) { }
496
497 // Notifies the node that it's list of children have changed (either by adding or removing child nodes), or a child
498 // node that is of the type CDATA_SECTION_NODE, TEXT_NODE or COMMENT_NODE has changed its value.
499 virtual void childrenChanged(bool /*changedByParser*/ = false, Node* /*beforeChange*/ = 0, Node* /*afterChange*/ = 0, int /*childCountDelta*/ = 0) { }
500
501 #if !defined(NDEBUG) || defined(ANDROID_DOM_LOGGING)
502 virtual void formatForDebugger(char* buffer, unsigned length) const;
503
504 void showNode(const char* prefix = "") const;
505 void showTreeForThis() const;
506 void showTreeAndMark(const Node* markedNode1, const char* markedLabel1, const Node* markedNode2 = 0, const char* markedLabel2 = 0) const;
507 #endif
508
509 void registerDynamicNodeList(DynamicNodeList*);
510 void unregisterDynamicNodeList(DynamicNodeList*);
511 void notifyNodeListsChildrenChanged();
512 void notifyLocalNodeListsChildrenChanged();
513 void notifyNodeListsAttributeChanged();
514 void notifyLocalNodeListsAttributeChanged();
515 void notifyLocalNodeListsLabelChanged();
516 void removeCachedClassNodeList(ClassNodeList*, const String&);
517 void removeCachedNameNodeList(NameNodeList*, const String&);
518 void removeCachedTagNodeList(TagNodeList*, const QualifiedName&);
519 void removeCachedLabelsNodeList(DynamicNodeList*);
520
521 PassRefPtr<NodeList> getElementsByTagName(const AtomicString&);
522 PassRefPtr<NodeList> getElementsByTagNameNS(const AtomicString& namespaceURI, const AtomicString& localName);
523 PassRefPtr<NodeList> getElementsByName(const String& elementName);
524 PassRefPtr<NodeList> getElementsByClassName(const String& classNames);
525
526 PassRefPtr<Element> querySelector(const String& selectors, ExceptionCode&);
527 PassRefPtr<NodeList> querySelectorAll(const String& selectors, ExceptionCode&);
528
529 unsigned short compareDocumentPosition(Node*);
530
toNode()531 virtual Node* toNode() { return this; }
532
533 virtual InputElement* toInputElement();
534
535 virtual ScriptExecutionContext* scriptExecutionContext() const;
536
537 virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture);
538 virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture);
539
540 // Handlers to do/undo actions on the target node before an event is dispatched to it and after the event
541 // has been dispatched. The data pointer is handed back by the preDispatch and passed to postDispatch.
preDispatchEventHandler(Event *)542 virtual void* preDispatchEventHandler(Event*) { return 0; }
postDispatchEventHandler(Event *,void *)543 virtual void postDispatchEventHandler(Event*, void* /*dataFromPreDispatch*/) { }
544
545 using EventTarget::dispatchEvent;
546 bool dispatchEvent(PassRefPtr<Event>);
547 void dispatchScopedEvent(PassRefPtr<Event>);
548
549 virtual void handleLocalEvents(Event*);
550
551 void dispatchSubtreeModifiedEvent();
552 void dispatchUIEvent(const AtomicString& eventType, int detail, PassRefPtr<Event> underlyingEvent);
553 bool dispatchKeyEvent(const PlatformKeyboardEvent&);
554 bool dispatchWheelEvent(const PlatformWheelEvent&);
555 bool dispatchMouseEvent(const PlatformMouseEvent&, const AtomicString& eventType, int clickCount = 0, Node* relatedTarget = 0);
556 void dispatchSimulatedClick(PassRefPtr<Event> underlyingEvent, bool sendMouseEvents = false, bool showPressedLook = true);
557
558 virtual void dispatchFocusEvent();
559 virtual void dispatchBlurEvent();
560 virtual void dispatchChangeEvent();
561 virtual void dispatchInputEvent();
562
563 // Perform the default action for an event.
564 virtual void defaultEventHandler(Event*);
565
566 // Used for disabled form elements; if true, prevents mouse events from being dispatched
567 // to event listeners, and prevents DOMActivate events from being sent at all.
568 virtual bool disabled() const;
569
570 using TreeShared<ContainerNode>::ref;
571 using TreeShared<ContainerNode>::deref;
572
573 virtual EventTargetData* eventTargetData();
574 virtual EventTargetData* ensureEventTargetData();
575
576 private:
577 enum NodeFlags {
578 IsTextFlag = 1,
579 IsCommentFlag = 1 << 1,
580 IsContainerFlag = 1 << 2,
581 IsElementFlag = 1 << 3,
582 IsStyledElementFlag = 1 << 4,
583 IsHTMLFlag = 1 << 5,
584 IsSVGFlag = 1 << 6,
585 HasIDFlag = 1 << 7,
586 HasClassFlag = 1 << 8,
587 IsAttachedFlag = 1 << 9,
588 ChildNeedsStyleRecalcFlag = 1 << 10,
589 InDocumentFlag = 1 << 11,
590 IsLinkFlag = 1 << 12,
591 IsActiveFlag = 1 << 13,
592 IsHoveredFlag = 1 << 14,
593 InActiveChainFlag = 1 << 15,
594 InDetachFlag = 1 << 16,
595 HasRareDataFlag = 1 << 17,
596 IsShadowRootFlag = 1 << 18,
597
598 // These bits are used by derived classes, pulled up here so they can
599 // be stored in the same memory word as the Node bits above.
600 IsParsingChildrenFinishedFlag = 1 << 19, // Element
601 IsStyleAttributeValidFlag = 1 << 20, // StyledElement
602 IsSynchronizingStyleAttributeFlag = 1 << 21, // StyledElement
603 #if ENABLE(SVG)
604 AreSVGAttributesValidFlag = 1 << 22, // Element
605 IsSynchronizingSVGAttributesFlag = 1 << 23, // SVGElement
606 HasSVGRareDataFlag = 1 << 24, // SVGElement
607 #endif
608
609 StyleChangeMask = 1 << nodeStyleChangeShift | 1 << (nodeStyleChangeShift + 1),
610
611 SelfOrAncestorHasDirAutoFlag = 1 << 27,
612
613 #if ENABLE(SVG)
614 DefaultNodeFlags = IsParsingChildrenFinishedFlag | IsStyleAttributeValidFlag | AreSVGAttributesValidFlag
615 #else
616 DefaultNodeFlags = IsParsingChildrenFinishedFlag | IsStyleAttributeValidFlag
617 #endif
618 };
619
620 // 4 bits remaining
621
getFlag(NodeFlags mask)622 bool getFlag(NodeFlags mask) const { return m_nodeFlags & mask; }
setFlag(bool f,NodeFlags mask)623 void setFlag(bool f, NodeFlags mask) const { m_nodeFlags = (m_nodeFlags & ~mask) | (-(int32_t)f & mask); }
setFlag(NodeFlags mask)624 void setFlag(NodeFlags mask) const { m_nodeFlags |= mask; }
clearFlag(NodeFlags mask)625 void clearFlag(NodeFlags mask) const { m_nodeFlags &= ~mask; }
626
627 protected:
628 enum ConstructionType {
629 CreateOther = DefaultNodeFlags,
630 CreateText = DefaultNodeFlags | IsTextFlag,
631 CreateComment = DefaultNodeFlags | IsCommentFlag,
632 CreateContainer = DefaultNodeFlags | IsContainerFlag,
633 CreateElement = CreateContainer | IsElementFlag,
634 CreateStyledElement = CreateElement | IsStyledElementFlag,
635 CreateHTMLElement = CreateStyledElement | IsHTMLFlag,
636 CreateSVGElement = CreateStyledElement | IsSVGFlag,
637 };
638 Node(Document*, ConstructionType);
639
640 // Do not use this method to change the document of a node until after the node has been
641 // removed from its previous document.
642 void setDocument(Document*);
643 void setDocumentRecursively(Document*);
644
645 virtual void willMoveToNewOwnerDocument();
646 virtual void didMoveToNewOwnerDocument();
647
addSubresourceAttributeURLs(ListHashSet<KURL> &)648 virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const { }
649 void setTabIndexExplicitly(short);
650 void clearTabIndexExplicitly();
651
hasRareData()652 bool hasRareData() const { return getFlag(HasRareDataFlag); }
653
654 NodeRareData* rareData() const;
655 NodeRareData* ensureRareData();
656
657 private:
658 enum EditableLevel { Editable, RichlyEditable };
659 bool rendererIsEditable(EditableLevel) const;
660
661 void setStyleChange(StyleChangeType);
662
663 // Used to share code between lazyAttach and setNeedsStyleRecalc.
664 void markAncestorsWithChildNeedsStyleRecalc();
665
666 RenderObject* createRendererAndStyle();
667
668 virtual void refEventTarget();
669 virtual void derefEventTarget();
670
671 virtual NodeRareData* createRareData();
672 bool rareDataFocused() const;
673
674 virtual RenderStyle* nonRendererRenderStyle() const;
675
676 virtual const AtomicString& virtualPrefix() const;
677 virtual const AtomicString& virtualLocalName() const;
678 virtual const AtomicString& virtualNamespaceURI() const;
679 virtual RenderStyle* virtualComputedStyle(PseudoId = NOPSEUDO);
680
681 Element* ancestorElement() const;
682
683 // Use Node::parentNode as the consistent way of querying a parent node.
684 // This method is made private to ensure a compiler error on call sites that
685 // don't follow this rule.
686 using TreeShared<ContainerNode>::parent;
687
688 void trackForDebugging();
689
690 Document* m_document;
691 Node* m_previous;
692 Node* m_next;
693 RenderObject* m_renderer;
694 mutable uint32_t m_nodeFlags;
695
696 protected:
isParsingChildrenFinished()697 bool isParsingChildrenFinished() const { return getFlag(IsParsingChildrenFinishedFlag); }
setIsParsingChildrenFinished()698 void setIsParsingChildrenFinished() { setFlag(IsParsingChildrenFinishedFlag); }
clearIsParsingChildrenFinished()699 void clearIsParsingChildrenFinished() { clearFlag(IsParsingChildrenFinishedFlag); }
isStyleAttributeValid()700 bool isStyleAttributeValid() const { return getFlag(IsStyleAttributeValidFlag); }
setIsStyleAttributeValid(bool f)701 void setIsStyleAttributeValid(bool f) { setFlag(f, IsStyleAttributeValidFlag); }
setIsStyleAttributeValid()702 void setIsStyleAttributeValid() const { setFlag(IsStyleAttributeValidFlag); }
clearIsStyleAttributeValid()703 void clearIsStyleAttributeValid() { clearFlag(IsStyleAttributeValidFlag); }
isSynchronizingStyleAttribute()704 bool isSynchronizingStyleAttribute() const { return getFlag(IsSynchronizingStyleAttributeFlag); }
setIsSynchronizingStyleAttribute(bool f)705 void setIsSynchronizingStyleAttribute(bool f) { setFlag(f, IsSynchronizingStyleAttributeFlag); }
setIsSynchronizingStyleAttribute()706 void setIsSynchronizingStyleAttribute() const { setFlag(IsSynchronizingStyleAttributeFlag); }
clearIsSynchronizingStyleAttribute()707 void clearIsSynchronizingStyleAttribute() const { clearFlag(IsSynchronizingStyleAttributeFlag); }
708
709 #if ENABLE(SVG)
areSVGAttributesValid()710 bool areSVGAttributesValid() const { return getFlag(AreSVGAttributesValidFlag); }
setAreSVGAttributesValid()711 void setAreSVGAttributesValid() const { setFlag(AreSVGAttributesValidFlag); }
clearAreSVGAttributesValid()712 void clearAreSVGAttributesValid() { clearFlag(AreSVGAttributesValidFlag); }
isSynchronizingSVGAttributes()713 bool isSynchronizingSVGAttributes() const { return getFlag(IsSynchronizingSVGAttributesFlag); }
setIsSynchronizingSVGAttributes()714 void setIsSynchronizingSVGAttributes() const { setFlag(IsSynchronizingSVGAttributesFlag); }
clearIsSynchronizingSVGAttributes()715 void clearIsSynchronizingSVGAttributes() const { clearFlag(IsSynchronizingSVGAttributesFlag); }
hasRareSVGData()716 bool hasRareSVGData() const { return getFlag(HasSVGRareDataFlag); }
setHasRareSVGData()717 void setHasRareSVGData() { setFlag(HasSVGRareDataFlag); }
clearHasRareSVGData()718 void clearHasRareSVGData() { clearFlag(HasSVGRareDataFlag); }
719 #endif
720 };
721
722 // Used in Node::addSubresourceAttributeURLs() and in addSubresourceStyleURLs()
addSubresourceURL(ListHashSet<KURL> & urls,const KURL & url)723 inline void addSubresourceURL(ListHashSet<KURL>& urls, const KURL& url)
724 {
725 if (!url.isNull())
726 urls.add(url);
727 }
728
parentNode()729 inline ContainerNode* Node::parentNode() const
730 {
731 return getFlag(IsShadowRootFlag) || isSVGShadowRoot() ? 0 : parent();
732 }
733
parentOrHostNode()734 inline ContainerNode* Node::parentOrHostNode() const
735 {
736 return parent();
737 }
738
parentNodeGuaranteedHostFree()739 inline ContainerNode* Node::parentNodeGuaranteedHostFree() const
740 {
741 ASSERT(!getFlag(IsShadowRootFlag) && !isSVGShadowRoot());
742 return parentOrHostNode();
743 }
744
745 } //namespace
746
747 #ifndef NDEBUG
748 // Outside the WebCore namespace for ease of invocation from gdb.
749 void showTree(const WebCore::Node*);
750 #endif
751
752 #endif
753