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