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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  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
6  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
7  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
8  * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
9  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
10  *
11  * This library is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Library General Public
13  * License as published by the Free Software Foundation; either
14  * version 2 of the License, or (at your option) any later version.
15  *
16  * This library is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19  * Library General Public License for more details.
20  *
21  * You should have received a copy of the GNU Library General Public License
22  * along with this library; see the file COPYING.LIB.  If not, write to
23  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24  * Boston, MA 02110-1301, USA.
25  */
26 
27 #include "config.h"
28 #include "Document.h"
29 
30 #include "AXObjectCache.h"
31 #include "AnimationController.h"
32 #include "Attr.h"
33 #include "Attribute.h"
34 #include "CDATASection.h"
35 #include "CSSPrimitiveValueCache.h"
36 #include "CSSStyleSelector.h"
37 #include "CSSStyleSheet.h"
38 #include "CSSValueKeywords.h"
39 #include "CachedCSSStyleSheet.h"
40 #include "CachedResourceLoader.h"
41 #include "Chrome.h"
42 #include "ChromeClient.h"
43 #include "Comment.h"
44 #include "Console.h"
45 #include "ContentSecurityPolicy.h"
46 #include "CookieJar.h"
47 #include "CustomEvent.h"
48 #include "DateComponents.h"
49 #include "DOMImplementation.h"
50 #include "DOMWindow.h"
51 #include "DeviceMotionEvent.h"
52 #include "DeviceOrientationEvent.h"
53 #include "DocumentFragment.h"
54 #include "DocumentLoader.h"
55 #include "DocumentMarkerController.h"
56 #include "DocumentType.h"
57 #include "EditingText.h"
58 #include "Editor.h"
59 #include "Element.h"
60 #include "EntityReference.h"
61 #include "Event.h"
62 #include "EventHandler.h"
63 #include "EventListener.h"
64 #include "EventNames.h"
65 #include "EventQueue.h"
66 #include "ExceptionCode.h"
67 #include "FocusController.h"
68 #include "FormAssociatedElement.h"
69 #include "Frame.h"
70 #include "FrameLoader.h"
71 #include "FrameLoaderClient.h"
72 #include "FrameTree.h"
73 #include "FrameView.h"
74 #include "HashChangeEvent.h"
75 #include "HTMLAllCollection.h"
76 #include "HTMLAnchorElement.h"
77 #include "HTMLBodyElement.h"
78 #include "HTMLCanvasElement.h"
79 #include "HTMLCollection.h"
80 #include "HTMLDocument.h"
81 #include "HTMLElementFactory.h"
82 #include "HTMLFrameOwnerElement.h"
83 #include "HTMLHeadElement.h"
84 #include "HTMLIFrameElement.h"
85 #include "HTMLInputElement.h"
86 #include "HTMLLinkElement.h"
87 #include "HTMLMapElement.h"
88 #include "HTMLNameCollection.h"
89 #include "HTMLNames.h"
90 #include "HTMLParserIdioms.h"
91 #include "HTMLStyleElement.h"
92 #include "HTMLTitleElement.h"
93 #include "HTTPParsers.h"
94 #include "HitTestRequest.h"
95 #include "HitTestResult.h"
96 #include "ImageLoader.h"
97 #include "InspectorInstrumentation.h"
98 #include "KeyboardEvent.h"
99 #include "Logging.h"
100 #include "MediaQueryList.h"
101 #include "MediaQueryMatcher.h"
102 #include "MessageEvent.h"
103 #include "MouseEvent.h"
104 #include "MouseEventWithHitTestResults.h"
105 #include "MutationEvent.h"
106 #include "NameNodeList.h"
107 #include "NestingLevelIncrementer.h"
108 #include "NodeFilter.h"
109 #include "NodeIterator.h"
110 #include "NodeWithIndex.h"
111 #include "OverflowEvent.h"
112 #include "Page.h"
113 #include "PageGroup.h"
114 #include "PageTransitionEvent.h"
115 #include "PlatformKeyboardEvent.h"
116 #include "PopStateEvent.h"
117 #include "ProcessingInstruction.h"
118 #include "ProgressEvent.h"
119 #include "RegisteredEventListener.h"
120 #include "RenderArena.h"
121 #include "RenderLayer.h"
122 #include "RenderLayerBacking.h"
123 #include "RenderTextControl.h"
124 #include "RenderView.h"
125 #include "RenderWidget.h"
126 #include "ScopedEventQueue.h"
127 #include "ScriptCallStack.h"
128 #include "ScriptController.h"
129 #include "ScriptElement.h"
130 #include "ScriptEventListener.h"
131 #include "ScriptRunner.h"
132 #include "SecurityOrigin.h"
133 #include "SegmentedString.h"
134 #include "SelectionController.h"
135 #include "Settings.h"
136 #include "StaticHashSetNodeList.h"
137 #include "StyleSheetList.h"
138 #include "TextEvent.h"
139 #include "TextResourceDecoder.h"
140 #include "Timer.h"
141 #include "TransformSource.h"
142 #include "TreeWalker.h"
143 #include "UIEvent.h"
144 #include "UserContentURLPattern.h"
145 #include "WebKitAnimationEvent.h"
146 #include "WebKitTransitionEvent.h"
147 #include "WheelEvent.h"
148 #include "XMLDocumentParser.h"
149 #include "XMLHttpRequest.h"
150 #include "XMLNSNames.h"
151 #include "XMLNames.h"
152 #include "htmlediting.h"
153 #include <wtf/CurrentTime.h>
154 #include <wtf/HashFunctions.h>
155 #include <wtf/MainThread.h>
156 #include <wtf/PassRefPtr.h>
157 #include <wtf/StdLibExtras.h>
158 #include <wtf/text/StringBuffer.h>
159 
160 #if ENABLE(SHARED_WORKERS)
161 #include "SharedWorkerRepository.h"
162 #endif
163 
164 #if ENABLE(DOM_STORAGE)
165 #include "StorageEvent.h"
166 #endif
167 
168 #if ENABLE(XPATH)
169 #include "XPathEvaluator.h"
170 #include "XPathExpression.h"
171 #include "XPathNSResolver.h"
172 #include "XPathResult.h"
173 #endif
174 
175 #if ENABLE(XSLT)
176 #include "XSLTProcessor.h"
177 #endif
178 
179 #if ENABLE(SVG)
180 #include "SVGDocumentExtensions.h"
181 #include "SVGElementFactory.h"
182 #include "SVGNames.h"
183 #include "SVGStyleElement.h"
184 #include "SVGZoomEvent.h"
185 #endif
186 
187 #ifdef ANDROID_META_SUPPORT
188 #include "PlatformBridge.h"
189 #include "Settings.h"
190 #endif
191 
192 #ifdef ANDROID_RESET_SELECTION
193 #include "CacheBuilder.h"
194 #include "HTMLTextAreaElement.h"
195 #endif
196 
197 #ifdef ANDROID_INSTRUMENT
198 #include "TimeCounter.h"
199 #endif
200 
201 #if ENABLE(TOUCH_EVENTS)
202 #if USE(V8)
203 #include "RuntimeEnabledFeatures.h"
204 #endif
205 #include "TouchEvent.h"
206 #endif
207 
208 #if ENABLE(WML)
209 #include "WMLDocument.h"
210 #include "WMLElement.h"
211 #include "WMLElementFactory.h"
212 #include "WMLNames.h"
213 #endif
214 
215 #if ENABLE(MATHML)
216 #include "MathMLElement.h"
217 #include "MathMLElementFactory.h"
218 #include "MathMLNames.h"
219 #endif
220 
221 #if ENABLE(XHTMLMP)
222 #include "HTMLNoScriptElement.h"
223 #endif
224 
225 #if ENABLE(FULLSCREEN_API)
226 #include "RenderFullScreen.h"
227 #endif
228 
229 #if ENABLE(REQUEST_ANIMATION_FRAME)
230 #include "RequestAnimationFrameCallback.h"
231 #include "ScriptedAnimationController.h"
232 #endif
233 
234 using namespace std;
235 using namespace WTF;
236 using namespace Unicode;
237 
238 namespace WebCore {
239 
240 using namespace HTMLNames;
241 
242 // #define INSTRUMENT_LAYOUT_SCHEDULING 1
243 
244 static const unsigned cMaxWriteRecursionDepth = 21;
245 
246 // This amount of time must have elapsed before we will even consider scheduling a layout without a delay.
247 // FIXME: For faster machines this value can really be lowered to 200.  250 is adequate, but a little high
248 // for dual G5s. :)
249 static const int cLayoutScheduleThreshold = 250;
250 
251 // DOM Level 2 says (letters added):
252 //
253 // a) Name start characters must have one of the categories Ll, Lu, Lo, Lt, Nl.
254 // b) Name characters other than Name-start characters must have one of the categories Mc, Me, Mn, Lm, or Nd.
255 // c) Characters in the compatibility area (i.e. with character code greater than #xF900 and less than #xFFFE) are not allowed in XML names.
256 // d) Characters which have a font or compatibility decomposition (i.e. those with a "compatibility formatting tag" in field 5 of the database -- marked by field 5 beginning with a "<") are not allowed.
257 // e) The following characters are treated as name-start characters rather than name characters, because the property file classifies them as Alphabetic: [#x02BB-#x02C1], #x0559, #x06E5, #x06E6.
258 // f) Characters #x20DD-#x20E0 are excluded (in accordance with Unicode, section 5.14).
259 // g) Character #x00B7 is classified as an extender, because the property list so identifies it.
260 // h) Character #x0387 is added as a name character, because #x00B7 is its canonical equivalent.
261 // i) Characters ':' and '_' are allowed as name-start characters.
262 // j) Characters '-' and '.' are allowed as name characters.
263 //
264 // It also contains complete tables. If we decide it's better, we could include those instead of the following code.
265 
isValidNameStart(UChar32 c)266 static inline bool isValidNameStart(UChar32 c)
267 {
268     // rule (e) above
269     if ((c >= 0x02BB && c <= 0x02C1) || c == 0x559 || c == 0x6E5 || c == 0x6E6)
270         return true;
271 
272     // rule (i) above
273     if (c == ':' || c == '_')
274         return true;
275 
276     // rules (a) and (f) above
277     const uint32_t nameStartMask = Letter_Lowercase | Letter_Uppercase | Letter_Other | Letter_Titlecase | Number_Letter;
278     if (!(Unicode::category(c) & nameStartMask))
279         return false;
280 
281     // rule (c) above
282     if (c >= 0xF900 && c < 0xFFFE)
283         return false;
284 
285     // rule (d) above
286     DecompositionType decompType = decompositionType(c);
287     if (decompType == DecompositionFont || decompType == DecompositionCompat)
288         return false;
289 
290     return true;
291 }
292 
isValidNamePart(UChar32 c)293 static inline bool isValidNamePart(UChar32 c)
294 {
295     // rules (a), (e), and (i) above
296     if (isValidNameStart(c))
297         return true;
298 
299     // rules (g) and (h) above
300     if (c == 0x00B7 || c == 0x0387)
301         return true;
302 
303     // rule (j) above
304     if (c == '-' || c == '.')
305         return true;
306 
307     // rules (b) and (f) above
308     const uint32_t otherNamePartMask = Mark_NonSpacing | Mark_Enclosing | Mark_SpacingCombining | Letter_Modifier | Number_DecimalDigit;
309     if (!(Unicode::category(c) & otherNamePartMask))
310         return false;
311 
312     // rule (c) above
313     if (c >= 0xF900 && c < 0xFFFE)
314         return false;
315 
316     // rule (d) above
317     DecompositionType decompType = decompositionType(c);
318     if (decompType == DecompositionFont || decompType == DecompositionCompat)
319         return false;
320 
321     return true;
322 }
323 
widgetForNode(Node * focusedNode)324 static Widget* widgetForNode(Node* focusedNode)
325 {
326     if (!focusedNode)
327         return 0;
328     RenderObject* renderer = focusedNode->renderer();
329     if (!renderer || !renderer->isWidget())
330         return 0;
331     return toRenderWidget(renderer)->widget();
332 }
333 
acceptsEditingFocus(Node * node)334 static bool acceptsEditingFocus(Node* node)
335 {
336     ASSERT(node);
337     ASSERT(node->rendererIsEditable());
338 
339     Node* root = node->rootEditableElement();
340     Frame* frame = node->document()->frame();
341     if (!frame || !root)
342         return false;
343 
344     return frame->editor()->shouldBeginEditing(rangeOfContents(root).get());
345 }
346 
disableRangeMutation(Page * page)347 static bool disableRangeMutation(Page* page)
348 {
349     // This check is made on super-hot code paths, so we only want this on Tiger and Leopard.
350 #if defined(TARGETING_TIGER) || defined(TARGETING_LEOPARD)
351     // Disable Range mutation on document modifications in Tiger and Leopard Mail
352     // See <rdar://problem/5865171>
353     return page && (page->settings()->needsLeopardMailQuirks() || page->settings()->needsTigerMailQuirks());
354 #else
355     UNUSED_PARAM(page);
356     return false;
357 #endif
358 }
359 
360 static HashSet<Document*>* documentsThatNeedStyleRecalc = 0;
361 
362 class DocumentWeakReference : public ThreadSafeRefCounted<DocumentWeakReference> {
363 public:
create(Document * document)364     static PassRefPtr<DocumentWeakReference> create(Document* document)
365     {
366         return adoptRef(new DocumentWeakReference(document));
367     }
368 
document()369     Document* document()
370     {
371         ASSERT(isMainThread());
372         return m_document;
373     }
374 
clear()375     void clear()
376     {
377         ASSERT(isMainThread());
378         m_document = 0;
379     }
380 
381 private:
DocumentWeakReference(Document * document)382     DocumentWeakReference(Document* document)
383         : m_document(document)
384     {
385         ASSERT(isMainThread());
386     }
387 
388     Document* m_document;
389 };
390 
391 uint64_t Document::s_globalTreeVersion = 0;
392 
Document(Frame * frame,const KURL & url,bool isXHTML,bool isHTML)393 Document::Document(Frame* frame, const KURL& url, bool isXHTML, bool isHTML)
394     : TreeScope(this)
395     , m_guardRefCount(0)
396     , m_compatibilityMode(NoQuirksMode)
397     , m_compatibilityModeLocked(false)
398     , m_domTreeVersion(++s_globalTreeVersion)
399 #ifdef ANDROID_STYLE_VERSION
400     , m_styleVersion(0)
401 #endif
402     , m_styleSheets(StyleSheetList::create(this))
403     , m_readyState(Complete)
404     , m_styleRecalcTimer(this, &Document::styleRecalcTimerFired)
405     , m_pendingStyleRecalcShouldForce(false)
406     , m_frameElementsShouldIgnoreScrolling(false)
407     , m_containsValidityStyleRules(false)
408     , m_updateFocusAppearanceRestoresSelection(false)
409     , m_ignoreDestructiveWriteCount(0)
410     , m_titleSetExplicitly(false)
411     , m_updateFocusAppearanceTimer(this, &Document::updateFocusAppearanceTimerFired)
412     , m_startTime(currentTime())
413     , m_overMinimumLayoutThreshold(false)
414     , m_extraLayoutDelay(0)
415     , m_scriptRunner(ScriptRunner::create(this))
416     , m_xmlVersion("1.0")
417     , m_xmlStandalone(false)
418     , m_savedRenderer(0)
419     , m_designMode(inherit)
420 #if ENABLE(SVG)
421     , m_svgExtensions(0)
422 #endif
423 #if ENABLE(DASHBOARD_SUPPORT)
424     , m_hasDashboardRegions(false)
425     , m_dashboardRegionsDirty(false)
426 #endif
427     , m_createRenderers(true)
428     , m_inPageCache(false)
429     , m_useSecureKeyboardEntryWhenActive(false)
430     , m_isXHTML(isXHTML)
431     , m_isHTML(isHTML)
432     , m_usesViewSourceStyles(false)
433     , m_sawElementsInKnownNamespaces(false)
434     , m_usingGeolocation(false)
435     , m_eventQueue(EventQueue::create(this))
436 #if ENABLE(WML)
437     , m_containsWMLContent(false)
438 #endif
439     , m_weakReference(DocumentWeakReference::create(this))
440     , m_idAttributeName(idAttr)
441 #if ENABLE(FULLSCREEN_API)
442     , m_areKeysEnabledInFullScreen(0)
443     , m_fullScreenRenderer(0)
444     , m_fullScreenChangeDelayTimer(this, &Document::fullScreenChangeDelayTimerFired)
445 #endif
446     , m_loadEventDelayCount(0)
447     , m_loadEventDelayTimer(this, &Document::loadEventDelayTimerFired)
448     , m_directionSetOnDocumentElement(false)
449     , m_writingModeSetOnDocumentElement(false)
450     , m_writeRecursionIsTooDeep(false)
451     , m_writeRecursionDepth(0)
452 {
453     m_document = this;
454 
455     m_pageGroupUserSheetCacheValid = false;
456 
457     m_printing = false;
458     m_paginatedForScreen = false;
459 
460     m_ignoreAutofocus = false;
461 
462     m_frame = frame;
463 
464     // We depend on the url getting immediately set in subframes, but we
465     // also depend on the url NOT getting immediately set in opened windows.
466     // See fast/dom/early-frame-url.html
467     // and fast/dom/location-new-window-no-crash.html, respectively.
468     // FIXME: Can/should we unify this behavior?
469     if ((frame && frame->ownerElement()) || !url.isEmpty())
470         setURL(url);
471 
472 #if !PLATFORM(ANDROID)
473     m_axObjectCache = 0;
474 #endif
475 
476     m_markers = new DocumentMarkerController();
477 
478     m_cachedResourceLoader = new CachedResourceLoader(this);
479 
480     m_visuallyOrdered = false;
481     m_bParsing = false;
482     m_wellFormed = false;
483 
484     m_textColor = Color::black;
485     m_listenerTypes = 0;
486     setInDocument();
487     m_inStyleRecalc = false;
488     m_closeAfterStyleRecalc = false;
489 
490     m_usesSiblingRules = false;
491     m_usesSiblingRulesOverride = false;
492     m_usesFirstLineRules = false;
493     m_usesFirstLetterRules = false;
494     m_usesBeforeAfterRules = false;
495     m_usesBeforeAfterRulesOverride = false;
496     m_usesRemUnits = false;
497     m_usesLinkRules = false;
498 
499     m_gotoAnchorNeededAfterStylesheetsLoad = false;
500 
501     m_didCalculateStyleSelector = false;
502     m_hasDirtyStyleSelector = false;
503     m_pendingStylesheets = 0;
504     m_ignorePendingStylesheets = false;
505     m_hasNodesWithPlaceholderStyle = false;
506     m_pendingSheetLayout = NoLayoutWithPendingSheets;
507 
508     m_cssTarget = 0;
509 
510     resetLinkColor();
511     resetVisitedLinkColor();
512     resetActiveLinkColor();
513 
514     m_processingLoadEvent = false;
515 
516     initSecurityContext();
517     initDNSPrefetch();
518 
519     static int docID = 0;
520     m_docID = docID++;
521 #if ENABLE(XHTMLMP)
522     m_shouldProcessNoScriptElement = !(m_frame && m_frame->script()->canExecuteScripts(NotAboutToExecuteScript));
523 #endif
524 }
525 
~Document()526 Document::~Document()
527 {
528     ASSERT(!renderer());
529     ASSERT(!m_inPageCache);
530     ASSERT(!m_savedRenderer);
531     ASSERT(m_ranges.isEmpty());
532     ASSERT(!m_styleRecalcTimer.isActive());
533     ASSERT(!m_parentTreeScope);
534 
535     m_scriptRunner.clear();
536 
537     removeAllEventListeners();
538 
539     // Currently we believe that Document can never outlive the parser.
540     // Although the Document may be replaced synchronously, DocumentParsers
541     // generally keep at least one reference to an Element which would in turn
542     // has a reference to the Document.  If you hit this ASSERT, then that
543     // assumption is wrong.  DocumentParser::detach() should ensure that even
544     // if the DocumentParser outlives the Document it won't cause badness.
545     ASSERT(!m_parser || m_parser->refCount() == 1);
546     detachParser();
547     m_document = 0;
548     m_cachedResourceLoader.clear();
549 
550     m_renderArena.clear();
551 
552     clearAXObjectCache();
553 
554     m_decoder = 0;
555 
556     for (size_t i = 0; i < m_nameCollectionInfo.size(); ++i)
557         deleteAllValues(m_nameCollectionInfo[i]);
558 
559     if (m_styleSheets)
560         m_styleSheets->documentDestroyed();
561 
562     if (m_elemSheet)
563         m_elemSheet->clearOwnerNode();
564     if (m_mappedElementSheet)
565         m_mappedElementSheet->clearOwnerNode();
566     if (m_pageUserSheet)
567         m_pageUserSheet->clearOwnerNode();
568     if (m_pageGroupUserSheets) {
569         for (size_t i = 0; i < m_pageGroupUserSheets->size(); ++i)
570             (*m_pageGroupUserSheets)[i]->clearOwnerNode();
571     }
572 
573     m_weakReference->clear();
574 
575     if (m_mediaQueryMatcher)
576         m_mediaQueryMatcher->documentDestroyed();
577 
578     if (m_implementation)
579         m_implementation->ownerDocumentDestroyed();
580 }
581 
removedLastRef()582 void Document::removedLastRef()
583 {
584     ASSERT(!m_deletionHasBegun);
585     if (m_guardRefCount) {
586         // If removing a child removes the last self-only ref, we don't
587         // want the scope to be destructed until after
588         // removeAllChildren returns, so we guard ourselves with an
589         // extra self-only ref.
590         guardRef();
591 
592         // We must make sure not to be retaining any of our children through
593         // these extra pointers or we will create a reference cycle.
594         m_docType = 0;
595         m_focusedNode = 0;
596         m_hoverNode = 0;
597         m_activeNode = 0;
598         m_titleElement = 0;
599         m_documentElement = 0;
600 #if ENABLE(FULLSCREEN_API)
601         m_fullScreenElement = 0;
602 #endif
603 
604         // removeAllChildren() doesn't always unregister IDs,
605         // so tear down scope information upfront to avoid having stale references in the map.
606         destroyTreeScopeData();
607         removeAllChildren();
608 
609         m_markers->detach();
610 
611         detachParser();
612 
613         m_cssCanvasElements.clear();
614 
615 #if ENABLE(REQUEST_ANIMATION_FRAME)
616         // FIXME: consider using ActiveDOMObject.
617         m_scriptedAnimationController = 0;
618 #endif
619 
620 #ifndef NDEBUG
621         m_inRemovedLastRefFunction = false;
622 #endif
623 
624         guardDeref();
625     } else {
626 #ifndef NDEBUG
627         m_deletionHasBegun = true;
628 #endif
629         delete this;
630     }
631 }
632 
getElementById(const AtomicString & id) const633 Element* Document::getElementById(const AtomicString& id) const
634 {
635     return TreeScope::getElementById(id);
636 }
637 
mediaQueryMatcher()638 MediaQueryMatcher* Document::mediaQueryMatcher()
639 {
640     if (!m_mediaQueryMatcher)
641         m_mediaQueryMatcher = MediaQueryMatcher::create(this);
642     return m_mediaQueryMatcher.get();
643 }
644 
setCompatibilityMode(CompatibilityMode mode)645 void Document::setCompatibilityMode(CompatibilityMode mode)
646 {
647     if (m_compatibilityModeLocked || mode == m_compatibilityMode)
648         return;
649     ASSERT(!documentElement() && !m_styleSheets->length());
650     bool wasInQuirksMode = inQuirksMode();
651     m_compatibilityMode = mode;
652     if (inQuirksMode() != wasInQuirksMode) {
653         // All user stylesheets have to reparse using the different mode.
654         clearPageUserSheet();
655         clearPageGroupUserSheets();
656     }
657 }
658 
compatMode() const659 String Document::compatMode() const
660 {
661     return inQuirksMode() ? "BackCompat" : "CSS1Compat";
662 }
663 
resetLinkColor()664 void Document::resetLinkColor()
665 {
666     m_linkColor = Color(0, 0, 238);
667 }
668 
resetVisitedLinkColor()669 void Document::resetVisitedLinkColor()
670 {
671     m_visitedLinkColor = Color(85, 26, 139);
672 }
673 
resetActiveLinkColor()674 void Document::resetActiveLinkColor()
675 {
676     m_activeLinkColor.setNamedColor("red");
677 }
678 
setDocType(PassRefPtr<DocumentType> docType)679 void Document::setDocType(PassRefPtr<DocumentType> docType)
680 {
681     // This should never be called more than once.
682     ASSERT(!m_docType || !docType);
683     m_docType = docType;
684     if (m_docType)
685         m_docType->setTreeScope(this);
686 
687 #ifdef ANDROID_META_SUPPORT
688     if (m_docType && !ownerElement()
689             && m_docType->publicId().startsWith("-//wapforum//dtd xhtml mobile 1.", false)) {
690         // fit mobile sites directly in the screen
691         processViewport("width=device-width");
692     }
693 #endif
694 }
695 
implementation()696 DOMImplementation* Document::implementation()
697 {
698     if (!m_implementation)
699         m_implementation = DOMImplementation::create(this);
700     return m_implementation.get();
701 }
702 
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)703 void Document::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
704 {
705     TreeScope::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
706 
707     // Invalidate the document element we have cached in case it was replaced.
708     m_documentElement = 0;
709 }
710 
cacheDocumentElement() const711 void Document::cacheDocumentElement() const
712 {
713     ASSERT(!m_documentElement);
714     m_documentElement = firstElementChild(this);
715 }
716 
createElement(const AtomicString & name,ExceptionCode & ec)717 PassRefPtr<Element> Document::createElement(const AtomicString& name, ExceptionCode& ec)
718 {
719     if (!isValidName(name)) {
720         ec = INVALID_CHARACTER_ERR;
721         return 0;
722     }
723 
724     if (m_isXHTML)
725         return HTMLElementFactory::createHTMLElement(QualifiedName(nullAtom, name, xhtmlNamespaceURI), this, 0, false);
726 
727     return createElement(QualifiedName(nullAtom, name, nullAtom), false);
728 }
729 
createDocumentFragment()730 PassRefPtr<DocumentFragment> Document::createDocumentFragment()
731 {
732     return DocumentFragment::create(document());
733 }
734 
createTextNode(const String & data)735 PassRefPtr<Text> Document::createTextNode(const String& data)
736 {
737     return Text::create(this, data);
738 }
739 
createComment(const String & data)740 PassRefPtr<Comment> Document::createComment(const String& data)
741 {
742     return Comment::create(this, data);
743 }
744 
createCDATASection(const String & data,ExceptionCode & ec)745 PassRefPtr<CDATASection> Document::createCDATASection(const String& data, ExceptionCode& ec)
746 {
747     if (isHTMLDocument()) {
748         ec = NOT_SUPPORTED_ERR;
749         return 0;
750     }
751     return CDATASection::create(this, data);
752 }
753 
createProcessingInstruction(const String & target,const String & data,ExceptionCode & ec)754 PassRefPtr<ProcessingInstruction> Document::createProcessingInstruction(const String& target, const String& data, ExceptionCode& ec)
755 {
756     if (!isValidName(target)) {
757         ec = INVALID_CHARACTER_ERR;
758         return 0;
759     }
760     if (isHTMLDocument()) {
761         ec = NOT_SUPPORTED_ERR;
762         return 0;
763     }
764     return ProcessingInstruction::create(this, target, data);
765 }
766 
createEntityReference(const String & name,ExceptionCode & ec)767 PassRefPtr<EntityReference> Document::createEntityReference(const String& name, ExceptionCode& ec)
768 {
769     if (!isValidName(name)) {
770         ec = INVALID_CHARACTER_ERR;
771         return 0;
772     }
773     if (isHTMLDocument()) {
774         ec = NOT_SUPPORTED_ERR;
775         return 0;
776     }
777     return EntityReference::create(this, name);
778 }
779 
createEditingTextNode(const String & text)780 PassRefPtr<EditingText> Document::createEditingTextNode(const String& text)
781 {
782     return EditingText::create(this, text);
783 }
784 
createCSSStyleDeclaration()785 PassRefPtr<CSSStyleDeclaration> Document::createCSSStyleDeclaration()
786 {
787     return CSSMutableStyleDeclaration::create();
788 }
789 
importNode(Node * importedNode,bool deep,ExceptionCode & ec)790 PassRefPtr<Node> Document::importNode(Node* importedNode, bool deep, ExceptionCode& ec)
791 {
792     ec = 0;
793 
794     if (!importedNode
795 #if ENABLE(SVG) && ENABLE(DASHBOARD_SUPPORT)
796         || (importedNode->isSVGElement() && page() && page()->settings()->usesDashboardBackwardCompatibilityMode())
797 #endif
798         ) {
799         ec = NOT_SUPPORTED_ERR;
800         return 0;
801     }
802 
803     switch (importedNode->nodeType()) {
804     case TEXT_NODE:
805         return createTextNode(importedNode->nodeValue());
806     case CDATA_SECTION_NODE:
807         return createCDATASection(importedNode->nodeValue(), ec);
808     case ENTITY_REFERENCE_NODE:
809         return createEntityReference(importedNode->nodeName(), ec);
810     case PROCESSING_INSTRUCTION_NODE:
811         return createProcessingInstruction(importedNode->nodeName(), importedNode->nodeValue(), ec);
812     case COMMENT_NODE:
813         return createComment(importedNode->nodeValue());
814     case ELEMENT_NODE: {
815         Element* oldElement = static_cast<Element*>(importedNode);
816         RefPtr<Element> newElement = createElementNS(oldElement->namespaceURI(), oldElement->tagQName().toString(), ec);
817 
818         if (ec)
819             return 0;
820 
821         NamedNodeMap* attrs = oldElement->attributes(true);
822         if (attrs) {
823             unsigned length = attrs->length();
824             for (unsigned i = 0; i < length; i++) {
825                 Attribute* attr = attrs->attributeItem(i);
826                 newElement->setAttribute(attr->name(), attr->value().impl(), ec);
827                 if (ec)
828                     return 0;
829             }
830         }
831 
832         newElement->copyNonAttributeProperties(oldElement);
833 
834         if (deep) {
835             for (Node* oldChild = oldElement->firstChild(); oldChild; oldChild = oldChild->nextSibling()) {
836                 RefPtr<Node> newChild = importNode(oldChild, true, ec);
837                 if (ec)
838                     return 0;
839                 newElement->appendChild(newChild.release(), ec);
840                 if (ec)
841                     return 0;
842             }
843         }
844 
845         return newElement.release();
846     }
847     case ATTRIBUTE_NODE:
848         return Attr::create(0, this, static_cast<Attr*>(importedNode)->attr()->clone());
849     case DOCUMENT_FRAGMENT_NODE: {
850         DocumentFragment* oldFragment = static_cast<DocumentFragment*>(importedNode);
851         RefPtr<DocumentFragment> newFragment = createDocumentFragment();
852         if (deep) {
853             for (Node* oldChild = oldFragment->firstChild(); oldChild; oldChild = oldChild->nextSibling()) {
854                 RefPtr<Node> newChild = importNode(oldChild, true, ec);
855                 if (ec)
856                     return 0;
857                 newFragment->appendChild(newChild.release(), ec);
858                 if (ec)
859                     return 0;
860             }
861         }
862 
863         return newFragment.release();
864     }
865     case ENTITY_NODE:
866     case NOTATION_NODE:
867         // FIXME: It should be possible to import these node types, however in DOM3 the DocumentType is readonly, so there isn't much sense in doing that.
868         // Ability to add these imported nodes to a DocumentType will be considered for addition to a future release of the DOM.
869     case DOCUMENT_NODE:
870     case DOCUMENT_TYPE_NODE:
871     case XPATH_NAMESPACE_NODE:
872         break;
873     }
874 
875     ec = NOT_SUPPORTED_ERR;
876     return 0;
877 }
878 
879 
adoptNode(PassRefPtr<Node> source,ExceptionCode & ec)880 PassRefPtr<Node> Document::adoptNode(PassRefPtr<Node> source, ExceptionCode& ec)
881 {
882     if (!source) {
883         ec = NOT_SUPPORTED_ERR;
884         return 0;
885     }
886 
887     if (source->isReadOnlyNode()) {
888         ec = NO_MODIFICATION_ALLOWED_ERR;
889         return 0;
890     }
891 
892     EventQueueScope scope;
893 
894     switch (source->nodeType()) {
895     case ENTITY_NODE:
896     case NOTATION_NODE:
897     case DOCUMENT_NODE:
898     case DOCUMENT_TYPE_NODE:
899     case XPATH_NAMESPACE_NODE:
900         ec = NOT_SUPPORTED_ERR;
901         return 0;
902     case ATTRIBUTE_NODE: {
903         Attr* attr = static_cast<Attr*>(source.get());
904         if (attr->ownerElement())
905             attr->ownerElement()->removeAttributeNode(attr, ec);
906         attr->setSpecified(true);
907         break;
908     }
909     default:
910         if (source->hasTagName(iframeTag)) {
911             HTMLIFrameElement* iframe = static_cast<HTMLIFrameElement*>(source.get());
912             if (frame() && frame()->tree()->isDescendantOf(iframe->contentFrame())) {
913                 ec = HIERARCHY_REQUEST_ERR;
914                 return 0;
915             }
916             iframe->setRemainsAliveOnRemovalFromTree(attached() && source->attached());
917         }
918 
919         if (source->parentNode())
920             source->parentNode()->removeChild(source.get(), ec);
921     }
922 
923     source->setTreeScopeRecursively(this);
924 
925     return source;
926 }
927 
hasPrefixNamespaceMismatch(const QualifiedName & qName)928 bool Document::hasPrefixNamespaceMismatch(const QualifiedName& qName)
929 {
930     // These checks are from DOM Core Level 2, createElementNS
931     // http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-DocCrElNS
932     if (!qName.prefix().isEmpty() && qName.namespaceURI().isNull()) // createElementNS(null, "html:div")
933         return true;
934     if (qName.prefix() == xmlAtom && qName.namespaceURI() != XMLNames::xmlNamespaceURI) // createElementNS("http://www.example.com", "xml:lang")
935         return true;
936 
937     // Required by DOM Level 3 Core and unspecified by DOM Level 2 Core:
938     // http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#ID-DocCrElNS
939     // createElementNS("http://www.w3.org/2000/xmlns/", "foo:bar"), createElementNS(null, "xmlns:bar")
940     if ((qName.prefix() == xmlnsAtom && qName.namespaceURI() != XMLNSNames::xmlnsNamespaceURI) || (qName.prefix() != xmlnsAtom && qName.namespaceURI() == XMLNSNames::xmlnsNamespaceURI))
941         return true;
942 
943     return false;
944 }
945 
946 // FIXME: This should really be in a possible ElementFactory class
createElement(const QualifiedName & qName,bool createdByParser)947 PassRefPtr<Element> Document::createElement(const QualifiedName& qName, bool createdByParser)
948 {
949     RefPtr<Element> e;
950 
951     // FIXME: Use registered namespaces and look up in a hash to find the right factory.
952     if (qName.namespaceURI() == xhtmlNamespaceURI)
953         e = HTMLElementFactory::createHTMLElement(qName, this, 0, createdByParser);
954 #if ENABLE(SVG)
955     else if (qName.namespaceURI() == SVGNames::svgNamespaceURI)
956         e = SVGElementFactory::createSVGElement(qName, this, createdByParser);
957 #endif
958 #if ENABLE(WML)
959     else if (qName.namespaceURI() == WMLNames::wmlNamespaceURI)
960         e = WMLElementFactory::createWMLElement(qName, this, createdByParser);
961     else if (isWMLDocument())
962         e = WMLElementFactory::createWMLElement(QualifiedName(nullAtom, qName.localName(), WMLNames::wmlNamespaceURI), this, createdByParser);
963 #endif
964 #if ENABLE(MATHML)
965     else if (qName.namespaceURI() == MathMLNames::mathmlNamespaceURI)
966         e = MathMLElementFactory::createMathMLElement(qName, this, createdByParser);
967 #endif
968 
969     if (e)
970         m_sawElementsInKnownNamespaces = true;
971     else
972         e = Element::create(qName, document());
973 
974     // <image> uses imgTag so we need a special rule.
975 #if ENABLE(WML)
976     if (!isWMLDocument())
977 #endif
978     ASSERT((qName.matches(imageTag) && e->tagQName().matches(imgTag) && e->tagQName().prefix() == qName.prefix()) || qName == e->tagQName());
979 
980     return e.release();
981 }
982 
createElementNS(const String & namespaceURI,const String & qualifiedName,ExceptionCode & ec)983 PassRefPtr<Element> Document::createElementNS(const String& namespaceURI, const String& qualifiedName, ExceptionCode& ec)
984 {
985     String prefix, localName;
986     if (!parseQualifiedName(qualifiedName, prefix, localName, ec))
987         return 0;
988 
989     QualifiedName qName(prefix, localName, namespaceURI);
990     if (hasPrefixNamespaceMismatch(qName)) {
991         ec = NAMESPACE_ERR;
992         return 0;
993     }
994 
995     return createElement(qName, false);
996 }
997 
readyState() const998 String Document::readyState() const
999 {
1000     DEFINE_STATIC_LOCAL(const String, loading, ("loading"));
1001     DEFINE_STATIC_LOCAL(const String, interactive, ("interactive"));
1002     DEFINE_STATIC_LOCAL(const String, complete, ("complete"));
1003 
1004     switch (m_readyState) {
1005     case Loading:
1006         return loading;
1007     case Interactive:
1008         return interactive;
1009     case Complete:
1010         return complete;
1011     }
1012 
1013     ASSERT_NOT_REACHED();
1014     return String();
1015 }
1016 
setReadyState(ReadyState readyState)1017 void Document::setReadyState(ReadyState readyState)
1018 {
1019     if (readyState == m_readyState)
1020         return;
1021 
1022     switch (readyState) {
1023     case Loading:
1024         if (!m_documentTiming.domLoading)
1025             m_documentTiming.domLoading = currentTime();
1026         break;
1027     case Interactive:
1028         if (!m_documentTiming.domInteractive)
1029             m_documentTiming.domInteractive = currentTime();
1030         break;
1031     case Complete:
1032         if (!m_documentTiming.domComplete)
1033             m_documentTiming.domComplete = currentTime();
1034         break;
1035     }
1036 
1037     m_readyState = readyState;
1038     dispatchEvent(Event::create(eventNames().readystatechangeEvent, false, false));
1039 }
1040 
encoding() const1041 String Document::encoding() const
1042 {
1043     if (TextResourceDecoder* d = decoder())
1044         return d->encoding().domName();
1045     return String();
1046 }
1047 
defaultCharset() const1048 String Document::defaultCharset() const
1049 {
1050     if (Settings* settings = this->settings())
1051         return settings->defaultTextEncodingName();
1052     return String();
1053 }
1054 
setCharset(const String & charset)1055 void Document::setCharset(const String& charset)
1056 {
1057     if (!decoder())
1058         return;
1059     decoder()->setEncoding(charset, TextResourceDecoder::UserChosenEncoding);
1060 }
1061 
setXMLVersion(const String & version,ExceptionCode & ec)1062 void Document::setXMLVersion(const String& version, ExceptionCode& ec)
1063 {
1064     if (!implementation()->hasFeature("XML", String())) {
1065         ec = NOT_SUPPORTED_ERR;
1066         return;
1067     }
1068 
1069     if (!XMLDocumentParser::supportsXMLVersion(version)) {
1070         ec = NOT_SUPPORTED_ERR;
1071         return;
1072     }
1073 
1074     m_xmlVersion = version;
1075 }
1076 
setXMLStandalone(bool standalone,ExceptionCode & ec)1077 void Document::setXMLStandalone(bool standalone, ExceptionCode& ec)
1078 {
1079     if (!implementation()->hasFeature("XML", String())) {
1080         ec = NOT_SUPPORTED_ERR;
1081         return;
1082     }
1083 
1084     m_xmlStandalone = standalone;
1085 }
1086 
setDocumentURI(const String & uri)1087 void Document::setDocumentURI(const String& uri)
1088 {
1089     m_documentURI = uri;
1090     updateBaseURL();
1091 }
1092 
baseURI() const1093 KURL Document::baseURI() const
1094 {
1095     return m_baseURL;
1096 }
1097 
setContent(const String & content)1098 void Document::setContent(const String& content)
1099 {
1100     open();
1101     m_parser->append(content);
1102     close();
1103 }
1104 
1105 // FIXME: We need to discuss the DOM API here at some point. Ideas:
1106 // * making it receive a rect as parameter, i.e. nodesFromRect(x, y, w, h);
1107 // * making it receive the expading size of each direction separately,
1108 //   i.e. nodesFromRect(x, y, topSize, rightSize, bottomSize, leftSize);
nodesFromRect(int centerX,int centerY,unsigned topPadding,unsigned rightPadding,unsigned bottomPadding,unsigned leftPadding,bool ignoreClipping) const1109 PassRefPtr<NodeList> Document::nodesFromRect(int centerX, int centerY, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding, bool ignoreClipping) const
1110 {
1111     // FIXME: Share code between this, elementFromPoint and caretRangeFromPoint.
1112     if (!renderer())
1113         return 0;
1114     Frame* frame = this->frame();
1115     if (!frame)
1116         return 0;
1117     FrameView* frameView = frame->view();
1118     if (!frameView)
1119         return 0;
1120 
1121     float zoomFactor = frame->pageZoomFactor();
1122     IntPoint point = roundedIntPoint(FloatPoint(centerX * zoomFactor + view()->scrollX(), centerY * zoomFactor + view()->scrollY()));
1123 
1124     int type = HitTestRequest::ReadOnly | HitTestRequest::Active;
1125 
1126     // When ignoreClipping is false, this method returns null for coordinates outside of the viewport.
1127     if (ignoreClipping)
1128         type |= HitTestRequest::IgnoreClipping;
1129     else if (!frameView->visibleContentRect().intersects(HitTestResult::rectForPoint(point, topPadding, rightPadding, bottomPadding, leftPadding)))
1130         return 0;
1131 
1132     HitTestRequest request(type);
1133 
1134     // Passing a zero padding will trigger a rect hit test, however for the purposes of nodesFromRect,
1135     // we special handle this case in order to return a valid NodeList.
1136     if (!topPadding && !rightPadding && !bottomPadding && !leftPadding) {
1137         HitTestResult result(point);
1138         return handleZeroPadding(request, result);
1139     }
1140 
1141     HitTestResult result(point, topPadding, rightPadding, bottomPadding, leftPadding);
1142     renderView()->layer()->hitTest(request, result);
1143 
1144     return StaticHashSetNodeList::adopt(result.rectBasedTestResult());
1145 }
1146 
handleZeroPadding(const HitTestRequest & request,HitTestResult & result) const1147 PassRefPtr<NodeList> Document::handleZeroPadding(const HitTestRequest& request, HitTestResult& result) const
1148 {
1149     renderView()->layer()->hitTest(request, result);
1150 
1151     Node* node = result.innerNode();
1152     if (!node)
1153         return 0;
1154 
1155     node = node->shadowAncestorNode();
1156     ListHashSet<RefPtr<Node> > list;
1157     list.add(node);
1158     return StaticHashSetNodeList::adopt(list);
1159 }
1160 
nodeFromPoint(Frame * frame,RenderView * renderView,int x,int y,IntPoint * localPoint=0)1161 static Node* nodeFromPoint(Frame* frame, RenderView* renderView, int x, int y, IntPoint* localPoint = 0)
1162 {
1163     if (!frame)
1164         return 0;
1165     FrameView* frameView = frame->view();
1166     if (!frameView)
1167         return 0;
1168 
1169     float zoomFactor = frame->pageZoomFactor();
1170     IntPoint point = roundedIntPoint(FloatPoint(x * zoomFactor  + frameView->scrollX(), y * zoomFactor + frameView->scrollY()));
1171 
1172     if (!frameView->visibleContentRect().contains(point))
1173         return 0;
1174 
1175     HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
1176     HitTestResult result(point);
1177     renderView->layer()->hitTest(request, result);
1178 
1179     if (localPoint)
1180         *localPoint = result.localPoint();
1181 
1182     return result.innerNode();
1183 }
1184 
elementFromPoint(int x,int y) const1185 Element* Document::elementFromPoint(int x, int y) const
1186 {
1187     if (!renderer())
1188         return 0;
1189     Node* node = nodeFromPoint(frame(), renderView(), x, y);
1190     while (node && !node->isElementNode())
1191         node = node->parentNode();
1192     if (node)
1193         node = node->shadowAncestorNode();
1194     return static_cast<Element*>(node);
1195 }
1196 
caretRangeFromPoint(int x,int y)1197 PassRefPtr<Range> Document::caretRangeFromPoint(int x, int y)
1198 {
1199     if (!renderer())
1200         return 0;
1201     IntPoint localPoint;
1202     Node* node = nodeFromPoint(frame(), renderView(), x, y, &localPoint);
1203     if (!node)
1204         return 0;
1205 
1206     Node* shadowAncestorNode = node->shadowAncestorNode();
1207     if (shadowAncestorNode != node) {
1208         unsigned offset = shadowAncestorNode->nodeIndex();
1209         ContainerNode* container = shadowAncestorNode->parentNode();
1210         return Range::create(this, container, offset, container, offset);
1211     }
1212 
1213     RenderObject* renderer = node->renderer();
1214     if (!renderer)
1215         return 0;
1216     VisiblePosition visiblePosition = renderer->positionForPoint(localPoint);
1217     if (visiblePosition.isNull())
1218         return 0;
1219 
1220     Position rangeCompliantPosition = visiblePosition.deepEquivalent().parentAnchoredEquivalent();
1221     return Range::create(this, rangeCompliantPosition, rangeCompliantPosition);
1222 }
1223 
1224 /*
1225  * Performs three operations:
1226  *  1. Convert control characters to spaces
1227  *  2. Trim leading and trailing spaces
1228  *  3. Collapse internal whitespace.
1229  */
canonicalizedTitle(Document * document,const StringWithDirection & titleWithDirection)1230 static inline StringWithDirection canonicalizedTitle(Document* document, const StringWithDirection& titleWithDirection)
1231 {
1232     const String& title = titleWithDirection.string();
1233     const UChar* characters = title.characters();
1234     unsigned length = title.length();
1235     unsigned i;
1236 
1237     StringBuffer buffer(length);
1238     unsigned builderIndex = 0;
1239 
1240     // Skip leading spaces and leading characters that would convert to spaces
1241     for (i = 0; i < length; ++i) {
1242         UChar c = characters[i];
1243         if (!(c <= 0x20 || c == 0x7F))
1244             break;
1245     }
1246 
1247     if (i == length)
1248         return StringWithDirection();
1249 
1250     // Replace control characters with spaces, and backslashes with currency symbols, and collapse whitespace.
1251     bool previousCharWasWS = false;
1252     for (; i < length; ++i) {
1253         UChar c = characters[i];
1254         if (c <= 0x20 || c == 0x7F || (WTF::Unicode::category(c) & (WTF::Unicode::Separator_Line | WTF::Unicode::Separator_Paragraph))) {
1255             if (previousCharWasWS)
1256                 continue;
1257             buffer[builderIndex++] = ' ';
1258             previousCharWasWS = true;
1259         } else {
1260             buffer[builderIndex++] = c;
1261             previousCharWasWS = false;
1262         }
1263     }
1264 
1265     // Strip trailing spaces
1266     while (builderIndex > 0) {
1267         --builderIndex;
1268         if (buffer[builderIndex] != ' ')
1269             break;
1270     }
1271 
1272     if (!builderIndex && buffer[builderIndex] == ' ')
1273         return StringWithDirection();
1274 
1275     buffer.shrink(builderIndex + 1);
1276 
1277     // Replace the backslashes with currency symbols if the encoding requires it.
1278     document->displayBufferModifiedByEncoding(buffer.characters(), buffer.length());
1279 
1280     return StringWithDirection(String::adopt(buffer), titleWithDirection.direction());
1281 }
1282 
updateTitle(const StringWithDirection & title)1283 void Document::updateTitle(const StringWithDirection& title)
1284 {
1285     if (m_rawTitle == title)
1286         return;
1287 
1288     m_rawTitle = title;
1289     m_title = canonicalizedTitle(this, m_rawTitle);
1290     if (Frame* f = frame())
1291         f->loader()->setTitle(m_title);
1292 }
1293 
setTitle(const String & title)1294 void Document::setTitle(const String& title)
1295 {
1296     // Title set by JavaScript -- overrides any title elements.
1297     m_titleSetExplicitly = true;
1298     if (!isHTMLDocument())
1299         m_titleElement = 0;
1300     else if (!m_titleElement) {
1301         if (HTMLElement* headElement = head()) {
1302             m_titleElement = createElement(titleTag, false);
1303             ExceptionCode ec = 0;
1304             headElement->appendChild(m_titleElement, ec);
1305             ASSERT(!ec);
1306         }
1307     }
1308 
1309     // The DOM API has no method of specifying direction, so assume LTR.
1310     updateTitle(StringWithDirection(title, LTR));
1311 
1312     if (m_titleElement) {
1313         ASSERT(m_titleElement->hasTagName(titleTag));
1314         if (m_titleElement->hasTagName(titleTag))
1315             static_cast<HTMLTitleElement*>(m_titleElement.get())->setText(title);
1316     }
1317 }
1318 
setTitleElement(const StringWithDirection & title,Element * titleElement)1319 void Document::setTitleElement(const StringWithDirection& title, Element* titleElement)
1320 {
1321     if (titleElement != m_titleElement) {
1322         if (m_titleElement || m_titleSetExplicitly)
1323             // Only allow the first title element to change the title -- others have no effect.
1324             return;
1325         m_titleElement = titleElement;
1326     }
1327 
1328     updateTitle(title);
1329 }
1330 
removeTitle(Element * titleElement)1331 void Document::removeTitle(Element* titleElement)
1332 {
1333     if (m_titleElement != titleElement)
1334         return;
1335 
1336     m_titleElement = 0;
1337     m_titleSetExplicitly = false;
1338 
1339     // Update title based on first title element in the head, if one exists.
1340     if (HTMLElement* headElement = head()) {
1341         for (Node* e = headElement->firstChild(); e; e = e->nextSibling())
1342             if (e->hasTagName(titleTag)) {
1343                 HTMLTitleElement* titleElement = static_cast<HTMLTitleElement*>(e);
1344                 setTitleElement(titleElement->textWithDirection(), titleElement);
1345                 break;
1346             }
1347     }
1348 
1349     if (!m_titleElement)
1350         updateTitle(StringWithDirection());
1351 }
1352 
nodeName() const1353 String Document::nodeName() const
1354 {
1355     return "#document";
1356 }
1357 
nodeType() const1358 Node::NodeType Document::nodeType() const
1359 {
1360     return DOCUMENT_NODE;
1361 }
1362 
view() const1363 FrameView* Document::view() const
1364 {
1365     return m_frame ? m_frame->view() : 0;
1366 }
1367 
page() const1368 Page* Document::page() const
1369 {
1370     return m_frame ? m_frame->page() : 0;
1371 }
1372 
settings() const1373 Settings* Document::settings() const
1374 {
1375     return m_frame ? m_frame->settings() : 0;
1376 }
1377 
createRange()1378 PassRefPtr<Range> Document::createRange()
1379 {
1380     return Range::create(this);
1381 }
1382 
createNodeIterator(Node * root,unsigned whatToShow,PassRefPtr<NodeFilter> filter,bool expandEntityReferences,ExceptionCode & ec)1383 PassRefPtr<NodeIterator> Document::createNodeIterator(Node* root, unsigned whatToShow,
1384     PassRefPtr<NodeFilter> filter, bool expandEntityReferences, ExceptionCode& ec)
1385 {
1386     if (!root) {
1387         ec = NOT_SUPPORTED_ERR;
1388         return 0;
1389     }
1390     return NodeIterator::create(root, whatToShow, filter, expandEntityReferences);
1391 }
1392 
createTreeWalker(Node * root,unsigned whatToShow,PassRefPtr<NodeFilter> filter,bool expandEntityReferences,ExceptionCode & ec)1393 PassRefPtr<TreeWalker> Document::createTreeWalker(Node* root, unsigned whatToShow,
1394     PassRefPtr<NodeFilter> filter, bool expandEntityReferences, ExceptionCode& ec)
1395 {
1396     if (!root) {
1397         ec = NOT_SUPPORTED_ERR;
1398         return 0;
1399     }
1400     return TreeWalker::create(root, whatToShow, filter, expandEntityReferences);
1401 }
1402 
scheduleForcedStyleRecalc()1403 void Document::scheduleForcedStyleRecalc()
1404 {
1405     m_pendingStyleRecalcShouldForce = true;
1406     scheduleStyleRecalc();
1407 }
1408 
scheduleStyleRecalc()1409 void Document::scheduleStyleRecalc()
1410 {
1411     if (m_styleRecalcTimer.isActive() || inPageCache())
1412         return;
1413 
1414     ASSERT(childNeedsStyleRecalc() || m_pendingStyleRecalcShouldForce);
1415 
1416     if (!documentsThatNeedStyleRecalc)
1417         documentsThatNeedStyleRecalc = new HashSet<Document*>;
1418     documentsThatNeedStyleRecalc->add(this);
1419 
1420     // FIXME: Why on earth is this here? This is clearly misplaced.
1421     invalidateAccessKeyMap();
1422 
1423     m_styleRecalcTimer.startOneShot(0);
1424 }
1425 
unscheduleStyleRecalc()1426 void Document::unscheduleStyleRecalc()
1427 {
1428     ASSERT(!childNeedsStyleRecalc());
1429 
1430     if (documentsThatNeedStyleRecalc)
1431         documentsThatNeedStyleRecalc->remove(this);
1432 
1433     m_styleRecalcTimer.stop();
1434     m_pendingStyleRecalcShouldForce = false;
1435 }
1436 
isPendingStyleRecalc() const1437 bool Document::isPendingStyleRecalc() const
1438 {
1439     return m_styleRecalcTimer.isActive() && !m_inStyleRecalc;
1440 }
1441 
styleRecalcTimerFired(Timer<Document> *)1442 void Document::styleRecalcTimerFired(Timer<Document>*)
1443 {
1444     updateStyleIfNeeded();
1445 }
1446 
childNeedsAndNotInStyleRecalc()1447 bool Document::childNeedsAndNotInStyleRecalc()
1448 {
1449     return childNeedsStyleRecalc() && !m_inStyleRecalc;
1450 }
1451 
recalcStyle(StyleChange change)1452 void Document::recalcStyle(StyleChange change)
1453 {
1454     // we should not enter style recalc while painting
1455     if (view() && view()->isPainting()) {
1456         ASSERT(!view()->isPainting());
1457         return;
1458     }
1459 
1460     if (m_inStyleRecalc)
1461         return; // Guard against re-entrancy. -dwh
1462 
1463     if (m_hasDirtyStyleSelector)
1464         recalcStyleSelector();
1465 
1466     InspectorInstrumentationCookie cookie = InspectorInstrumentation::willRecalculateStyle(this);
1467 
1468     m_inStyleRecalc = true;
1469     suspendPostAttachCallbacks();
1470     RenderWidget::suspendWidgetHierarchyUpdates();
1471 
1472     RefPtr<FrameView> frameView = view();
1473     if (frameView) {
1474         frameView->pauseScheduledEvents();
1475         frameView->beginDeferredRepaints();
1476     }
1477 
1478 #ifdef ANDROID_INSTRUMENT
1479     android::TimeCounter::start(android::TimeCounter::CalculateStyleTimeCounter);
1480 #endif
1481 
1482     ASSERT(!renderer() || renderArena());
1483     if (!renderer() || !renderArena())
1484         goto bail_out;
1485 
1486     if (m_pendingStyleRecalcShouldForce)
1487         change = Force;
1488 
1489     if (change == Force) {
1490         // style selector may set this again during recalc
1491         m_hasNodesWithPlaceholderStyle = false;
1492 
1493         RefPtr<RenderStyle> documentStyle = CSSStyleSelector::styleForDocument(this);
1494         StyleChange ch = diff(documentStyle.get(), renderer()->style());
1495         if (renderer() && ch != NoChange)
1496             renderer()->setStyle(documentStyle.release());
1497     }
1498 
1499     for (Node* n = firstChild(); n; n = n->nextSibling())
1500         if (change >= Inherit || n->childNeedsStyleRecalc() || n->needsStyleRecalc())
1501             n->recalcStyle(change);
1502 
1503 #ifdef ANDROID_INSTRUMENT
1504     android::TimeCounter::record(android::TimeCounter::CalculateStyleTimeCounter, __FUNCTION__);
1505 #endif
1506 
1507 #if USE(ACCELERATED_COMPOSITING)
1508     if (view()) {
1509         bool layoutPending = view()->layoutPending() || renderer()->needsLayout();
1510         // If we didn't update compositing layers because of layout(), we need to do so here.
1511         if (!layoutPending)
1512             view()->updateCompositingLayers();
1513     }
1514 #endif
1515 
1516 bail_out:
1517     clearNeedsStyleRecalc();
1518     clearChildNeedsStyleRecalc();
1519     unscheduleStyleRecalc();
1520 
1521     m_inStyleRecalc = false;
1522 
1523     // Pseudo element removal and similar may only work with these flags still set. Reset them after the style recalc.
1524     if (m_styleSelector) {
1525         m_usesSiblingRules = m_styleSelector->usesSiblingRules();
1526         m_usesFirstLineRules = m_styleSelector->usesFirstLineRules();
1527         m_usesBeforeAfterRules = m_styleSelector->usesBeforeAfterRules();
1528         m_usesLinkRules = m_styleSelector->usesLinkRules();
1529     }
1530 
1531     if (frameView) {
1532         frameView->resumeScheduledEvents();
1533         frameView->endDeferredRepaints();
1534     }
1535     RenderWidget::resumeWidgetHierarchyUpdates();
1536     resumePostAttachCallbacks();
1537 
1538     // If we wanted to call implicitClose() during recalcStyle, do so now that we're finished.
1539     if (m_closeAfterStyleRecalc) {
1540         m_closeAfterStyleRecalc = false;
1541         implicitClose();
1542     }
1543 
1544     InspectorInstrumentation::didRecalculateStyle(cookie);
1545 }
1546 
updateStyleIfNeeded()1547 void Document::updateStyleIfNeeded()
1548 {
1549     ASSERT(isMainThread());
1550     ASSERT(!view() || (!view()->isInLayout() && !view()->isPainting()));
1551 
1552     if ((!m_pendingStyleRecalcShouldForce && !childNeedsStyleRecalc()) || inPageCache())
1553         return;
1554 
1555     if (m_frame)
1556         m_frame->animation()->beginAnimationUpdate();
1557 
1558     recalcStyle(NoChange);
1559 
1560     // Tell the animation controller that updateStyleIfNeeded is finished and it can do any post-processing
1561     if (m_frame)
1562         m_frame->animation()->endAnimationUpdate();
1563 }
1564 
updateStyleForAllDocuments()1565 void Document::updateStyleForAllDocuments()
1566 {
1567     ASSERT(isMainThread());
1568     if (!documentsThatNeedStyleRecalc)
1569         return;
1570 
1571     while (documentsThatNeedStyleRecalc->size()) {
1572         HashSet<Document*>::iterator it = documentsThatNeedStyleRecalc->begin();
1573         Document* doc = *it;
1574         documentsThatNeedStyleRecalc->remove(doc);
1575         doc->updateStyleIfNeeded();
1576     }
1577 }
1578 
updateLayout()1579 void Document::updateLayout()
1580 {
1581     ASSERT(isMainThread());
1582     if (Element* oe = ownerElement())
1583         oe->document()->updateLayout();
1584 
1585     updateStyleIfNeeded();
1586 
1587     // Only do a layout if changes have occurred that make it necessary.
1588     FrameView* v = view();
1589     if (v && renderer() && (v->layoutPending() || renderer()->needsLayout()))
1590         v->layout();
1591 }
1592 
1593 // FIXME: This is a bad idea and needs to be removed eventually.
1594 // Other browsers load stylesheets before they continue parsing the web page.
1595 // Since we don't, we can run JavaScript code that needs answers before the
1596 // stylesheets are loaded. Doing a layout ignoring the pending stylesheets
1597 // lets us get reasonable answers. The long term solution to this problem is
1598 // to instead suspend JavaScript execution.
updateLayoutIgnorePendingStylesheets()1599 void Document::updateLayoutIgnorePendingStylesheets()
1600 {
1601     bool oldIgnore = m_ignorePendingStylesheets;
1602 
1603     if (!haveStylesheetsLoaded()) {
1604         m_ignorePendingStylesheets = true;
1605         // FIXME: We are willing to attempt to suppress painting with outdated style info only once.  Our assumption is that it would be
1606         // dangerous to try to stop it a second time, after page content has already been loaded and displayed
1607         // with accurate style information.  (Our suppression involves blanking the whole page at the
1608         // moment.  If it were more refined, we might be able to do something better.)
1609         // It's worth noting though that this entire method is a hack, since what we really want to do is
1610         // suspend JS instead of doing a layout with inaccurate information.
1611         if (body() && !body()->renderer() && m_pendingSheetLayout == NoLayoutWithPendingSheets) {
1612             m_pendingSheetLayout = DidLayoutWithPendingSheets;
1613             styleSelectorChanged(RecalcStyleImmediately);
1614         } else if (m_hasNodesWithPlaceholderStyle)
1615             // If new nodes have been added or style recalc has been done with style sheets still pending, some nodes
1616             // may not have had their real style calculated yet. Normally this gets cleaned when style sheets arrive
1617             // but here we need up-to-date style immediately.
1618             recalcStyle(Force);
1619     }
1620 
1621     updateLayout();
1622 
1623     m_ignorePendingStylesheets = oldIgnore;
1624 }
1625 
styleForElementIgnoringPendingStylesheets(Element * element)1626 PassRefPtr<RenderStyle> Document::styleForElementIgnoringPendingStylesheets(Element* element)
1627 {
1628     ASSERT_ARG(element, element->document() == this);
1629 
1630     bool oldIgnore = m_ignorePendingStylesheets;
1631     m_ignorePendingStylesheets = true;
1632     RefPtr<RenderStyle> style = styleSelector()->styleForElement(element, element->parentNode() ? element->parentNode()->computedStyle() : 0);
1633     m_ignorePendingStylesheets = oldIgnore;
1634     return style.release();
1635 }
1636 
styleForPage(int pageIndex)1637 PassRefPtr<RenderStyle> Document::styleForPage(int pageIndex)
1638 {
1639     RefPtr<RenderStyle> style = styleSelector()->styleForPage(pageIndex);
1640     return style.release();
1641 }
1642 
isPageBoxVisible(int pageIndex)1643 bool Document::isPageBoxVisible(int pageIndex)
1644 {
1645     RefPtr<RenderStyle> style = styleForPage(pageIndex);
1646     return style->visibility() != HIDDEN; // display property doesn't apply to @page.
1647 }
1648 
pageSizeAndMarginsInPixels(int pageIndex,IntSize & pageSize,int & marginTop,int & marginRight,int & marginBottom,int & marginLeft)1649 void Document::pageSizeAndMarginsInPixels(int pageIndex, IntSize& pageSize, int& marginTop, int& marginRight, int& marginBottom, int& marginLeft)
1650 {
1651     RefPtr<RenderStyle> style = styleForPage(pageIndex);
1652 
1653     int width = pageSize.width();
1654     int height = pageSize.height();
1655     switch (style->pageSizeType()) {
1656     case PAGE_SIZE_AUTO:
1657         break;
1658     case PAGE_SIZE_AUTO_LANDSCAPE:
1659         if (width < height)
1660             std::swap(width, height);
1661         break;
1662     case PAGE_SIZE_AUTO_PORTRAIT:
1663         if (width > height)
1664             std::swap(width, height);
1665         break;
1666     case PAGE_SIZE_RESOLVED: {
1667         LengthSize size = style->pageSize();
1668         ASSERT(size.width().isFixed());
1669         ASSERT(size.height().isFixed());
1670         width = size.width().calcValue(0);
1671         height = size.height().calcValue(0);
1672         break;
1673     }
1674     default:
1675         ASSERT_NOT_REACHED();
1676     }
1677     pageSize = IntSize(width, height);
1678 
1679     // The percentage is calculated with respect to the width even for margin top and bottom.
1680     // http://www.w3.org/TR/CSS2/box.html#margin-properties
1681     marginTop = style->marginTop().isAuto() ? marginTop : style->marginTop().calcValue(width);
1682     marginRight = style->marginRight().isAuto() ? marginRight : style->marginRight().calcValue(width);
1683     marginBottom = style->marginBottom().isAuto() ? marginBottom : style->marginBottom().calcValue(width);
1684     marginLeft = style->marginLeft().isAuto() ? marginLeft : style->marginLeft().calcValue(width);
1685 }
1686 
cssPrimitiveValueCache() const1687 PassRefPtr<CSSPrimitiveValueCache> Document::cssPrimitiveValueCache() const
1688 {
1689     if (!m_cssPrimitiveValueCache)
1690         m_cssPrimitiveValueCache = CSSPrimitiveValueCache::create();
1691     return m_cssPrimitiveValueCache;
1692 }
1693 
createStyleSelector()1694 void Document::createStyleSelector()
1695 {
1696     bool matchAuthorAndUserStyles = true;
1697     if (Settings* docSettings = settings())
1698         matchAuthorAndUserStyles = docSettings->authorAndUserStylesEnabled();
1699     m_styleSelector.set(new CSSStyleSelector(this, m_styleSheets.get(), m_mappedElementSheet.get(), pageUserSheet(), pageGroupUserSheets(),
1700                                              !inQuirksMode(), matchAuthorAndUserStyles));
1701     // Delay resetting the flags until after next style recalc since unapplying the style may not work without these set (this is true at least with before/after).
1702     m_usesSiblingRules = m_usesSiblingRules || m_styleSelector->usesSiblingRules();
1703     m_usesFirstLineRules = m_usesFirstLineRules || m_styleSelector->usesFirstLineRules();
1704     m_usesBeforeAfterRules = m_usesBeforeAfterRules || m_styleSelector->usesBeforeAfterRules();
1705     m_usesLinkRules = m_usesLinkRules || m_styleSelector->usesLinkRules();
1706 }
1707 
attach()1708 void Document::attach()
1709 {
1710     ASSERT(!attached());
1711     ASSERT(!m_inPageCache);
1712 #if !PLATFORM(ANDROID)
1713     ASSERT(!m_axObjectCache);
1714 #endif
1715 
1716     if (!m_renderArena)
1717         m_renderArena = new RenderArena();
1718 
1719     // Create the rendering tree
1720     setRenderer(new (m_renderArena.get()) RenderView(this, view()));
1721 #if USE(ACCELERATED_COMPOSITING)
1722     renderView()->didMoveOnscreen();
1723 #endif
1724 
1725     recalcStyle(Force);
1726 
1727     RenderObject* render = renderer();
1728     setRenderer(0);
1729 
1730     TreeScope::attach();
1731 
1732     setRenderer(render);
1733 }
1734 
detach()1735 void Document::detach()
1736 {
1737     ASSERT(attached());
1738     ASSERT(!m_inPageCache);
1739 
1740     clearAXObjectCache();
1741     stopActiveDOMObjects();
1742     m_eventQueue->cancelQueuedEvents();
1743 
1744 #if ENABLE(REQUEST_ANIMATION_FRAME)
1745     // FIXME: consider using ActiveDOMObject.
1746     m_scriptedAnimationController = 0;
1747 #endif
1748 
1749     RenderObject* render = renderer();
1750 
1751     // Send out documentWillBecomeInactive() notifications to registered elements,
1752     // in order to stop media elements
1753     documentWillBecomeInactive();
1754 
1755 #if ENABLE(SHARED_WORKERS)
1756     SharedWorkerRepository::documentDetached(this);
1757 #endif
1758 
1759     if (m_frame) {
1760         FrameView* view = m_frame->view();
1761         if (view)
1762             view->detachCustomScrollbars();
1763     }
1764 
1765     // indicate destruction mode,  i.e. attached() but renderer == 0
1766     setRenderer(0);
1767 
1768 #if ENABLE(FULLSCREEN_API)
1769     if (m_fullScreenRenderer)
1770         setFullScreenRenderer(0);
1771 #endif
1772 
1773     m_hoverNode = 0;
1774     m_focusedNode = 0;
1775     m_activeNode = 0;
1776 
1777     TreeScope::detach();
1778 
1779     unscheduleStyleRecalc();
1780 
1781     if (render)
1782         render->destroy();
1783 
1784     // This is required, as our Frame might delete itself as soon as it detaches
1785     // us. However, this violates Node::detach() semantics, as it's never
1786     // possible to re-attach. Eventually Document::detach() should be renamed,
1787     // or this setting of the frame to 0 could be made explicit in each of the
1788     // callers of Document::detach().
1789     m_frame = 0;
1790     m_renderArena.clear();
1791 }
1792 
removeAllEventListeners()1793 void Document::removeAllEventListeners()
1794 {
1795 #if ENABLE(TOUCH_EVENTS)
1796     Page* ownerPage = page();
1797     if (!m_inPageCache && ownerPage && (m_frame == ownerPage->mainFrame()) && hasListenerType(Document::TOUCH_LISTENER)) {
1798         // Inform the Chrome Client that it no longer needs to forward touch
1799         // events to WebCore as the document removes all the event listeners.
1800         ownerPage->chrome()->client()->needTouchEvents(false);
1801     }
1802 #endif
1803 
1804     EventTarget::removeAllEventListeners();
1805 
1806     if (DOMWindow* domWindow = this->domWindow())
1807         domWindow->removeAllEventListeners();
1808     for (Node* node = firstChild(); node; node = node->traverseNextNode())
1809         node->removeAllEventListeners();
1810 }
1811 
renderView() const1812 RenderView* Document::renderView() const
1813 {
1814     return toRenderView(renderer());
1815 }
1816 
clearAXObjectCache()1817 void Document::clearAXObjectCache()
1818 {
1819 #if PLATFORM(ANDROID)
1820     return;
1821 #else
1822     // clear cache in top document
1823     if (m_axObjectCache) {
1824         // Clear the cache member variable before calling delete because attempts
1825         // are made to access it during destruction.
1826         AXObjectCache* axObjectCache = m_axObjectCache;
1827         m_axObjectCache = 0;
1828         delete axObjectCache;
1829         return;
1830     }
1831 
1832     // ask the top-level document to clear its cache
1833     Document* doc = topDocument();
1834     if (doc != this)
1835         doc->clearAXObjectCache();
1836 #endif
1837 }
1838 
axObjectCacheExists() const1839 bool Document::axObjectCacheExists() const
1840 {
1841 #if PLATFORM(ANDROID)
1842     return false;
1843 #else
1844     if (m_axObjectCache)
1845         return true;
1846 
1847     Document* doc = topDocument();
1848     if (doc != this)
1849         return doc->axObjectCacheExists();
1850 
1851     return false;
1852 #endif
1853 }
1854 
axObjectCache() const1855 AXObjectCache* Document::axObjectCache() const
1856 {
1857 #if PLATFORM(ANDROID)
1858     return 0;
1859 #else
1860     // The only document that actually has a AXObjectCache is the top-level
1861     // document.  This is because we need to be able to get from any WebCoreAXObject
1862     // to any other WebCoreAXObject on the same page.  Using a single cache allows
1863     // lookups across nested webareas (i.e. multiple documents).
1864 
1865     if (m_axObjectCache) {
1866         // return already known top-level cache
1867         if (!ownerElement())
1868             return m_axObjectCache;
1869 
1870         // In some pages with frames, the cache is created before the sub-webarea is
1871         // inserted into the tree.  Here, we catch that case and just toss the old
1872         // cache and start over.
1873         // NOTE: This recovery may no longer be needed. I have been unable to trigger
1874         // it again. See rdar://5794454
1875         // FIXME: Can this be fixed when inserting the subframe instead of now?
1876         // FIXME: If this function was called to get the cache in order to remove
1877         // an AXObject, we are now deleting the cache as a whole and returning a
1878         // new empty cache that does not contain the AXObject! That should actually
1879         // be OK. I am concerned about other cases like this where accessing the
1880         // cache blows away the AXObject being operated on.
1881         delete m_axObjectCache;
1882         m_axObjectCache = 0;
1883     }
1884 
1885     // ask the top-level document for its cache
1886     Document* doc = topDocument();
1887     if (doc != this)
1888         return doc->axObjectCache();
1889 
1890     // this is the top-level document, so install a new cache
1891     m_axObjectCache = new AXObjectCache(this);
1892     return m_axObjectCache;
1893 #endif // ANDROID
1894 }
1895 
setVisuallyOrdered()1896 void Document::setVisuallyOrdered()
1897 {
1898     m_visuallyOrdered = true;
1899     if (renderer())
1900         renderer()->style()->setVisuallyOrdered(true);
1901 }
1902 
createParser()1903 PassRefPtr<DocumentParser> Document::createParser()
1904 {
1905     // FIXME: this should probably pass the frame instead
1906     return XMLDocumentParser::create(this, view());
1907 }
1908 
scriptableDocumentParser() const1909 ScriptableDocumentParser* Document::scriptableDocumentParser() const
1910 {
1911     return parser() ? parser()->asScriptableDocumentParser() : 0;
1912 }
1913 
open(Document * ownerDocument)1914 void Document::open(Document* ownerDocument)
1915 {
1916     if (ownerDocument) {
1917         setURL(ownerDocument->url());
1918         m_cookieURL = ownerDocument->cookieURL();
1919         ScriptExecutionContext::setSecurityOrigin(ownerDocument->securityOrigin());
1920     }
1921 
1922     if (m_frame) {
1923         if (ScriptableDocumentParser* parser = scriptableDocumentParser()) {
1924             if (parser->isParsing()) {
1925                 // FIXME: HTML5 doesn't tell us to check this, it might not be correct.
1926                 if (parser->isExecutingScript())
1927                     return;
1928 
1929                 if (!parser->wasCreatedByScript() && parser->hasInsertionPoint())
1930                     return;
1931             }
1932         }
1933 
1934         if (m_frame->loader()->state() == FrameStateProvisional)
1935             m_frame->loader()->stopAllLoaders();
1936     }
1937 
1938     removeAllEventListeners();
1939     implicitOpen();
1940     if (ScriptableDocumentParser* parser = scriptableDocumentParser())
1941         parser->setWasCreatedByScript(true);
1942 
1943     if (DOMWindow* domWindow = this->domWindow())
1944         domWindow->removeAllEventListeners();
1945 
1946     if (m_frame)
1947         m_frame->loader()->didExplicitOpen();
1948 }
1949 
detachParser()1950 void Document::detachParser()
1951 {
1952     if (!m_parser)
1953         return;
1954     m_parser->detach();
1955     m_parser.clear();
1956 }
1957 
cancelParsing()1958 void Document::cancelParsing()
1959 {
1960     if (!m_parser)
1961         return;
1962 
1963     // We have to clear the parser to avoid possibly triggering
1964     // the onload handler when closing as a side effect of a cancel-style
1965     // change, such as opening a new document or closing the window while
1966     // still parsing
1967     detachParser();
1968     explicitClose();
1969 }
1970 
implicitOpen()1971 void Document::implicitOpen()
1972 {
1973     cancelParsing();
1974 
1975     removeChildren();
1976 
1977     setCompatibilityMode(NoQuirksMode);
1978 
1979     m_parser = createParser();
1980     setParsing(true);
1981     setReadyState(Loading);
1982 
1983     // If we reload, the animation controller sticks around and has
1984     // a stale animation time. We need to update it here.
1985     if (m_frame && m_frame->animation())
1986         m_frame->animation()->beginAnimationUpdate();
1987 }
1988 
body() const1989 HTMLElement* Document::body() const
1990 {
1991     Node* de = documentElement();
1992     if (!de)
1993         return 0;
1994 
1995     // try to prefer a FRAMESET element over BODY
1996     Node* body = 0;
1997     for (Node* i = de->firstChild(); i; i = i->nextSibling()) {
1998         if (i->hasTagName(framesetTag))
1999             return toHTMLElement(i);
2000 
2001         if (i->hasTagName(bodyTag) && !body)
2002             body = i;
2003     }
2004     return toHTMLElement(body);
2005 }
2006 
setBody(PassRefPtr<HTMLElement> newBody,ExceptionCode & ec)2007 void Document::setBody(PassRefPtr<HTMLElement> newBody, ExceptionCode& ec)
2008 {
2009     ec = 0;
2010 
2011     if (!newBody || !documentElement() || !newBody->hasTagName(bodyTag)) {
2012         ec = HIERARCHY_REQUEST_ERR;
2013         return;
2014     }
2015 
2016     if (newBody->document() && newBody->document() != this) {
2017         RefPtr<Node> node = importNode(newBody.get(), true, ec);
2018         if (ec)
2019             return;
2020 
2021         newBody = toHTMLElement(node.get());
2022     }
2023 
2024     HTMLElement* b = body();
2025     if (!b)
2026         documentElement()->appendChild(newBody, ec);
2027     else
2028         documentElement()->replaceChild(newBody, b, ec);
2029 }
2030 
head()2031 HTMLHeadElement* Document::head()
2032 {
2033     Node* de = documentElement();
2034     if (!de)
2035         return 0;
2036 
2037     for (Node* e = de->firstChild(); e; e = e->nextSibling())
2038         if (e->hasTagName(headTag))
2039             return static_cast<HTMLHeadElement*>(e);
2040 
2041     return 0;
2042 }
2043 
close()2044 void Document::close()
2045 {
2046     // FIXME: We should follow the specification more closely:
2047     //        http://www.whatwg.org/specs/web-apps/current-work/#dom-document-close
2048 
2049     if (!scriptableDocumentParser() || !scriptableDocumentParser()->wasCreatedByScript())
2050         return;
2051 
2052     explicitClose();
2053 }
2054 
explicitClose()2055 void Document::explicitClose()
2056 {
2057     if (!m_frame) {
2058         // Because we have no frame, we don't know if all loading has completed,
2059         // so we just call implicitClose() immediately. FIXME: This might fire
2060         // the load event prematurely <http://bugs.webkit.org/show_bug.cgi?id=14568>.
2061         if (m_parser)
2062             m_parser->finish();
2063         implicitClose();
2064         return;
2065     }
2066 
2067     // This code calls implicitClose() if all loading has completed.
2068     loader()->writer()->endIfNotLoadingMainResource();
2069     if (m_frame)
2070         m_frame->loader()->checkCompleted();
2071 }
2072 
implicitClose()2073 void Document::implicitClose()
2074 {
2075     // If we're in the middle of recalcStyle, we need to defer the close until the style information is accurate and all elements are re-attached.
2076     if (m_inStyleRecalc) {
2077         m_closeAfterStyleRecalc = true;
2078         return;
2079     }
2080 
2081     bool wasLocationChangePending = frame() && frame()->navigationScheduler()->locationChangePending();
2082     bool doload = !parsing() && m_parser && !m_processingLoadEvent && !wasLocationChangePending;
2083 
2084     if (!doload)
2085         return;
2086 
2087     m_processingLoadEvent = true;
2088 
2089     ScriptableDocumentParser* parser = scriptableDocumentParser();
2090     m_wellFormed = parser && parser->wellFormed();
2091 
2092     // We have to clear the parser, in case someone document.write()s from the
2093     // onLoad event handler, as in Radar 3206524.
2094     detachParser();
2095 
2096     // Parser should have picked up all preloads by now
2097     m_cachedResourceLoader->clearPreloads();
2098 
2099     // FIXME: We kick off the icon loader when the Document is done parsing.
2100     // There are earlier opportunities we could start it:
2101     //  -When the <head> finishes parsing
2102     //  -When any new HTMLLinkElement is inserted into the document
2103     // But those add a dynamic component to the favicon that has UI
2104     // ramifications, and we need to decide what is the Right Thing To Do(tm)
2105     Frame* f = frame();
2106     if (f)
2107         f->loader()->startIconLoader();
2108 
2109     // Resume the animations (or start them)
2110     if (f)
2111         f->animation()->resumeAnimationsForDocument(this);
2112 
2113     ImageLoader::dispatchPendingBeforeLoadEvents();
2114     ImageLoader::dispatchPendingLoadEvents();
2115     dispatchWindowLoadEvent();
2116     enqueuePageshowEvent(PageshowEventNotPersisted);
2117     enqueuePopstateEvent(m_pendingStateObject ? m_pendingStateObject.release() : SerializedScriptValue::nullValue());
2118 
2119     if (f)
2120         f->loader()->handledOnloadEvents();
2121 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2122     if (!ownerElement())
2123         printf("onload fired at %d\n", elapsedTime());
2124 #endif
2125 
2126     m_processingLoadEvent = false;
2127 
2128     // An event handler may have removed the frame
2129     if (!frame())
2130         return;
2131 
2132     // Make sure both the initial layout and reflow happen after the onload
2133     // fires. This will improve onload scores, and other browsers do it.
2134     // If they wanna cheat, we can too. -dwh
2135 
2136     if (frame()->navigationScheduler()->locationChangePending() && elapsedTime() < cLayoutScheduleThreshold) {
2137         // Just bail out. Before or during the onload we were shifted to another page.
2138         // The old i-Bench suite does this. When this happens don't bother painting or laying out.
2139         view()->unscheduleRelayout();
2140         return;
2141     }
2142 
2143     frame()->loader()->checkCallImplicitClose();
2144     RenderObject* renderObject = renderer();
2145 
2146     // We used to force a synchronous display and flush here.  This really isn't
2147     // necessary and can in fact be actively harmful if pages are loading at a rate of > 60fps
2148     // (if your platform is syncing flushes and limiting them to 60fps).
2149     m_overMinimumLayoutThreshold = true;
2150     if (!ownerElement() || (ownerElement()->renderer() && !ownerElement()->renderer()->needsLayout())) {
2151         updateStyleIfNeeded();
2152 
2153         // Always do a layout after loading if needed.
2154         if (view() && renderObject && (!renderObject->firstChild() || renderObject->needsLayout()))
2155             view()->layout();
2156     }
2157 
2158 #if PLATFORM(MAC) || PLATFORM(CHROMIUM)
2159     if (f && renderObject && this == topDocument() && AXObjectCache::accessibilityEnabled()) {
2160         // The AX cache may have been cleared at this point, but we need to make sure it contains an
2161         // AX object to send the notification to. getOrCreate will make sure that an valid AX object
2162         // exists in the cache (we ignore the return value because we don't need it here). This is
2163         // only safe to call when a layout is not in progress, so it can not be used in postNotification.
2164         axObjectCache()->getOrCreate(renderObject);
2165         axObjectCache()->postNotification(renderObject, AXObjectCache::AXLoadComplete, true);
2166     }
2167 #endif
2168 
2169 #if ENABLE(SVG)
2170     // FIXME: Officially, time 0 is when the outermost <svg> receives its
2171     // SVGLoad event, but we don't implement those yet.  This is close enough
2172     // for now.  In some cases we should have fired earlier.
2173     if (svgExtensions())
2174         accessSVGExtensions()->startAnimations();
2175 #endif
2176 }
2177 
setParsing(bool b)2178 void Document::setParsing(bool b)
2179 {
2180     m_bParsing = b;
2181     if (!m_bParsing && view())
2182         view()->scheduleRelayout();
2183 
2184 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2185     if (!ownerElement() && !m_bParsing)
2186         printf("Parsing finished at %d\n", elapsedTime());
2187 #endif
2188 }
2189 
shouldScheduleLayout()2190 bool Document::shouldScheduleLayout()
2191 {
2192     // This function will only be called when FrameView thinks a layout is needed.
2193     // This enforces a couple extra rules.
2194     //
2195     //    (a) Only schedule a layout once the stylesheets are loaded.
2196     //    (b) Only schedule layout once we have a body element.
2197 
2198     return (haveStylesheetsLoaded() && body())
2199         || (documentElement() && !documentElement()->hasTagName(htmlTag));
2200 }
2201 
isLayoutTimerActive()2202 bool Document::isLayoutTimerActive()
2203 {
2204     if (!view() || !view()->layoutPending())
2205         return false;
2206     bool isPendingLayoutImmediate = minimumLayoutDelay() == m_extraLayoutDelay;
2207     return isPendingLayoutImmediate;
2208 }
2209 
minimumLayoutDelay()2210 int Document::minimumLayoutDelay()
2211 {
2212     if (m_overMinimumLayoutThreshold)
2213         return m_extraLayoutDelay;
2214 
2215     int elapsed = elapsedTime();
2216     m_overMinimumLayoutThreshold = elapsed > cLayoutScheduleThreshold;
2217 
2218     // We'll want to schedule the timer to fire at the minimum layout threshold.
2219     return max(0, cLayoutScheduleThreshold - elapsed) + m_extraLayoutDelay;
2220 }
2221 
elapsedTime() const2222 int Document::elapsedTime() const
2223 {
2224     return static_cast<int>((currentTime() - m_startTime) * 1000);
2225 }
2226 
write(const SegmentedString & text,Document * ownerDocument)2227 void Document::write(const SegmentedString& text, Document* ownerDocument)
2228 {
2229     NestingLevelIncrementer nestingLevelIncrementer(m_writeRecursionDepth);
2230 
2231     m_writeRecursionIsTooDeep = (m_writeRecursionDepth > 1) && m_writeRecursionIsTooDeep;
2232     m_writeRecursionIsTooDeep = (m_writeRecursionDepth > cMaxWriteRecursionDepth) || m_writeRecursionIsTooDeep;
2233 
2234     if (m_writeRecursionIsTooDeep)
2235        return;
2236 
2237 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2238     if (!ownerElement())
2239         printf("Beginning a document.write at %d\n", elapsedTime());
2240 #endif
2241 
2242     bool hasInsertionPoint = m_parser && m_parser->hasInsertionPoint();
2243     if (!hasInsertionPoint && m_ignoreDestructiveWriteCount)
2244         return;
2245 
2246     if (!hasInsertionPoint)
2247         open(ownerDocument);
2248 
2249     ASSERT(m_parser);
2250     m_parser->insert(text);
2251 
2252 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2253     if (!ownerElement())
2254         printf("Ending a document.write at %d\n", elapsedTime());
2255 #endif
2256 }
2257 
write(const String & text,Document * ownerDocument)2258 void Document::write(const String& text, Document* ownerDocument)
2259 {
2260     write(SegmentedString(text), ownerDocument);
2261 }
2262 
writeln(const String & text,Document * ownerDocument)2263 void Document::writeln(const String& text, Document* ownerDocument)
2264 {
2265     write(text, ownerDocument);
2266     write("\n", ownerDocument);
2267 }
2268 
finishParsing()2269 void Document::finishParsing()
2270 {
2271 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2272     if (!ownerElement())
2273         printf("Received all data at %d\n", elapsedTime());
2274 #endif
2275 
2276     // Let the parser go through as much data as it can.  There will be three possible outcomes after
2277     // finish() is called:
2278     // (1) All remaining data is parsed, document isn't loaded yet
2279     // (2) All remaining data is parsed, document is loaded, parser gets deleted
2280     // (3) Data is still remaining to be parsed.
2281     if (m_parser)
2282         m_parser->finish();
2283 }
2284 
virtualURL() const2285 const KURL& Document::virtualURL() const
2286 {
2287     return m_url;
2288 }
2289 
virtualCompleteURL(const String & url) const2290 KURL Document::virtualCompleteURL(const String& url) const
2291 {
2292     return completeURL(url);
2293 }
2294 
minimumTimerInterval() const2295 double Document::minimumTimerInterval() const
2296 {
2297     Page* p = page();
2298     if (!p)
2299         return ScriptExecutionContext::minimumTimerInterval();
2300     return p->settings()->minDOMTimerInterval();
2301 }
2302 
errorEventTarget()2303 EventTarget* Document::errorEventTarget()
2304 {
2305     return domWindow();
2306 }
2307 
logExceptionToConsole(const String & errorMessage,int lineNumber,const String & sourceURL,PassRefPtr<ScriptCallStack> callStack)2308 void Document::logExceptionToConsole(const String& errorMessage, int lineNumber, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack)
2309 {
2310     MessageType messageType = callStack ? UncaughtExceptionMessageType : LogMessageType;
2311     addMessage(JSMessageSource, messageType, ErrorMessageLevel, errorMessage, lineNumber, sourceURL, callStack);
2312 }
2313 
setURL(const KURL & url)2314 void Document::setURL(const KURL& url)
2315 {
2316     const KURL& newURL = url.isEmpty() ? blankURL() : url;
2317     if (newURL == m_url)
2318         return;
2319 
2320     m_url = newURL;
2321     m_documentURI = m_url.string();
2322     updateBaseURL();
2323 }
2324 
updateBaseURL()2325 void Document::updateBaseURL()
2326 {
2327     // DOM 3 Core: When the Document supports the feature "HTML" [DOM Level 2 HTML], the base URI is computed using
2328     // first the value of the href attribute of the HTML BASE element if any, and the value of the documentURI attribute
2329     // from the Document interface otherwise.
2330     if (m_baseElementURL.isEmpty()) {
2331         // The documentURI attribute is an arbitrary string. DOM 3 Core does not specify how it should be resolved,
2332         // so we use a null base URL.
2333         m_baseURL = KURL(KURL(), documentURI());
2334     } else
2335         m_baseURL = m_baseElementURL;
2336     if (!m_baseURL.isValid())
2337         m_baseURL = KURL();
2338 
2339     if (m_elemSheet)
2340         m_elemSheet->setFinalURL(m_baseURL);
2341     if (m_mappedElementSheet)
2342         m_mappedElementSheet->setFinalURL(m_baseURL);
2343 }
2344 
processBaseElement()2345 void Document::processBaseElement()
2346 {
2347     // Find the first href attribute in a base element and the first target attribute in a base element.
2348     const AtomicString* href = 0;
2349     const AtomicString* target = 0;
2350     for (Node* node = document()->firstChild(); node && (!href || !target); node = node->traverseNextNode()) {
2351         if (node->hasTagName(baseTag)) {
2352             if (!href) {
2353                 const AtomicString& value = static_cast<Element*>(node)->fastGetAttribute(hrefAttr);
2354                 if (!value.isNull())
2355                     href = &value;
2356             }
2357             if (!target) {
2358                 const AtomicString& value = static_cast<Element*>(node)->fastGetAttribute(targetAttr);
2359                 if (!value.isNull())
2360                     target = &value;
2361             }
2362         }
2363     }
2364 
2365     // FIXME: Since this doesn't share code with completeURL it may not handle encodings correctly.
2366     KURL baseElementURL;
2367     if (href) {
2368         String strippedHref = stripLeadingAndTrailingHTMLSpaces(*href);
2369         if (!strippedHref.isEmpty())
2370             baseElementURL = KURL(url(), strippedHref);
2371     }
2372     if (m_baseElementURL != baseElementURL) {
2373         m_baseElementURL = baseElementURL;
2374         updateBaseURL();
2375     }
2376 
2377     m_baseTarget = target ? *target : nullAtom;
2378 }
2379 
userAgent(const KURL & url) const2380 String Document::userAgent(const KURL& url) const
2381 {
2382     return frame() ? frame()->loader()->userAgent(url) : String();
2383 }
2384 
pageUserSheet()2385 CSSStyleSheet* Document::pageUserSheet()
2386 {
2387     if (m_pageUserSheet)
2388         return m_pageUserSheet.get();
2389 
2390     Page* owningPage = page();
2391     if (!owningPage)
2392         return 0;
2393 
2394     String userSheetText = owningPage->userStyleSheet();
2395     if (userSheetText.isEmpty())
2396         return 0;
2397 
2398     // Parse the sheet and cache it.
2399     m_pageUserSheet = CSSStyleSheet::createInline(this, settings()->userStyleSheetLocation());
2400     m_pageUserSheet->setIsUserStyleSheet(true);
2401     m_pageUserSheet->parseString(userSheetText, !inQuirksMode());
2402     return m_pageUserSheet.get();
2403 }
2404 
clearPageUserSheet()2405 void Document::clearPageUserSheet()
2406 {
2407     if (m_pageUserSheet) {
2408         m_pageUserSheet = 0;
2409         styleSelectorChanged(DeferRecalcStyle);
2410     }
2411 }
2412 
updatePageUserSheet()2413 void Document::updatePageUserSheet()
2414 {
2415     clearPageUserSheet();
2416     if (pageUserSheet())
2417         styleSelectorChanged(RecalcStyleImmediately);
2418 }
2419 
pageGroupUserSheets() const2420 const Vector<RefPtr<CSSStyleSheet> >* Document::pageGroupUserSheets() const
2421 {
2422     if (m_pageGroupUserSheetCacheValid)
2423         return m_pageGroupUserSheets.get();
2424 
2425     m_pageGroupUserSheetCacheValid = true;
2426 
2427     Page* owningPage = page();
2428     if (!owningPage)
2429         return 0;
2430 
2431     const PageGroup& pageGroup = owningPage->group();
2432     const UserStyleSheetMap* sheetsMap = pageGroup.userStyleSheets();
2433     if (!sheetsMap)
2434         return 0;
2435 
2436     UserStyleSheetMap::const_iterator end = sheetsMap->end();
2437     for (UserStyleSheetMap::const_iterator it = sheetsMap->begin(); it != end; ++it) {
2438         const UserStyleSheetVector* sheets = it->second;
2439         for (unsigned i = 0; i < sheets->size(); ++i) {
2440             const UserStyleSheet* sheet = sheets->at(i).get();
2441             if (sheet->injectedFrames() == InjectInTopFrameOnly && ownerElement())
2442                 continue;
2443             if (!UserContentURLPattern::matchesPatterns(url(), sheet->whitelist(), sheet->blacklist()))
2444                 continue;
2445             RefPtr<CSSStyleSheet> parsedSheet = CSSStyleSheet::createInline(const_cast<Document*>(this), sheet->url());
2446             parsedSheet->setIsUserStyleSheet(sheet->level() == UserStyleUserLevel);
2447             parsedSheet->parseString(sheet->source(), !inQuirksMode());
2448             if (!m_pageGroupUserSheets)
2449                 m_pageGroupUserSheets.set(new Vector<RefPtr<CSSStyleSheet> >);
2450             m_pageGroupUserSheets->append(parsedSheet.release());
2451         }
2452     }
2453 
2454     return m_pageGroupUserSheets.get();
2455 }
2456 
clearPageGroupUserSheets()2457 void Document::clearPageGroupUserSheets()
2458 {
2459     m_pageGroupUserSheetCacheValid = false;
2460     if (m_pageGroupUserSheets && m_pageGroupUserSheets->size()) {
2461         m_pageGroupUserSheets->clear();
2462         styleSelectorChanged(DeferRecalcStyle);
2463     }
2464 }
2465 
updatePageGroupUserSheets()2466 void Document::updatePageGroupUserSheets()
2467 {
2468     clearPageGroupUserSheets();
2469     if (pageGroupUserSheets() && pageGroupUserSheets()->size())
2470         styleSelectorChanged(RecalcStyleImmediately);
2471 }
2472 
elementSheet()2473 CSSStyleSheet* Document::elementSheet()
2474 {
2475     if (!m_elemSheet)
2476         m_elemSheet = CSSStyleSheet::createInline(this, m_baseURL);
2477     return m_elemSheet.get();
2478 }
2479 
mappedElementSheet()2480 CSSStyleSheet* Document::mappedElementSheet()
2481 {
2482     if (!m_mappedElementSheet)
2483         m_mappedElementSheet = CSSStyleSheet::createInline(this, m_baseURL);
2484     return m_mappedElementSheet.get();
2485 }
2486 
nextNodeWithExactTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2487 static Node* nextNodeWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2488 {
2489     // Search is inclusive of start
2490     for (Node* n = start; n; n = n->traverseNextNode())
2491         if (n->isKeyboardFocusable(event) && n->tabIndex() == tabIndex)
2492             return n;
2493 
2494     return 0;
2495 }
2496 
previousNodeWithExactTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2497 static Node* previousNodeWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2498 {
2499     // Search is inclusive of start
2500     for (Node* n = start; n; n = n->traversePreviousNode())
2501         if (n->isKeyboardFocusable(event) && n->tabIndex() == tabIndex)
2502             return n;
2503 
2504     return 0;
2505 }
2506 
nextNodeWithGreaterTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2507 static Node* nextNodeWithGreaterTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2508 {
2509     // Search is inclusive of start
2510     int winningTabIndex = SHRT_MAX + 1;
2511     Node* winner = 0;
2512     for (Node* n = start; n; n = n->traverseNextNode())
2513         if (n->isKeyboardFocusable(event) && n->tabIndex() > tabIndex && n->tabIndex() < winningTabIndex) {
2514             winner = n;
2515             winningTabIndex = n->tabIndex();
2516         }
2517 
2518     return winner;
2519 }
2520 
previousNodeWithLowerTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2521 static Node* previousNodeWithLowerTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2522 {
2523     // Search is inclusive of start
2524     int winningTabIndex = 0;
2525     Node* winner = 0;
2526     for (Node* n = start; n; n = n->traversePreviousNode())
2527         if (n->isKeyboardFocusable(event) && n->tabIndex() < tabIndex && n->tabIndex() > winningTabIndex) {
2528             winner = n;
2529             winningTabIndex = n->tabIndex();
2530         }
2531 
2532     return winner;
2533 }
2534 
nextFocusableNode(Node * start,KeyboardEvent * event)2535 Node* Document::nextFocusableNode(Node* start, KeyboardEvent* event)
2536 {
2537     if (start) {
2538         // If a node is excluded from the normal tabbing cycle, the next focusable node is determined by tree order
2539         if (start->tabIndex() < 0) {
2540             for (Node* n = start->traverseNextNode(); n; n = n->traverseNextNode())
2541                 if (n->isKeyboardFocusable(event) && n->tabIndex() >= 0)
2542                     return n;
2543         }
2544 
2545         // First try to find a node with the same tabindex as start that comes after start in the document.
2546         if (Node* winner = nextNodeWithExactTabIndex(start->traverseNextNode(), start->tabIndex(), event))
2547             return winner;
2548 
2549         if (!start->tabIndex())
2550             // We've reached the last node in the document with a tabindex of 0. This is the end of the tabbing order.
2551             return 0;
2552     }
2553 
2554     // Look for the first node in the document that:
2555     // 1) has the lowest tabindex that is higher than start's tabindex (or 0, if start is null), and
2556     // 2) comes first in the document, if there's a tie.
2557     if (Node* winner = nextNodeWithGreaterTabIndex(this, start ? start->tabIndex() : 0, event))
2558         return winner;
2559 
2560     // There are no nodes with a tabindex greater than start's tabindex,
2561     // so find the first node with a tabindex of 0.
2562     return nextNodeWithExactTabIndex(this, 0, event);
2563 }
2564 
previousFocusableNode(Node * start,KeyboardEvent * event)2565 Node* Document::previousFocusableNode(Node* start, KeyboardEvent* event)
2566 {
2567     Node* last;
2568     for (last = this; last->lastChild(); last = last->lastChild()) { }
2569 
2570     // First try to find the last node in the document that comes before start and has the same tabindex as start.
2571     // If start is null, find the last node in the document with a tabindex of 0.
2572     Node* startingNode;
2573     int startingTabIndex;
2574     if (start) {
2575         startingNode = start->traversePreviousNode();
2576         startingTabIndex = start->tabIndex();
2577     } else {
2578         startingNode = last;
2579         startingTabIndex = 0;
2580     }
2581 
2582     // However, if a node is excluded from the normal tabbing cycle, the previous focusable node is determined by tree order
2583     if (startingTabIndex < 0) {
2584         for (Node* n = startingNode; n; n = n->traversePreviousNode())
2585             if (n->isKeyboardFocusable(event) && n->tabIndex() >= 0)
2586                 return n;
2587     }
2588 
2589     if (Node* winner = previousNodeWithExactTabIndex(startingNode, startingTabIndex, event))
2590         return winner;
2591 
2592     // There are no nodes before start with the same tabindex as start, so look for a node that:
2593     // 1) has the highest non-zero tabindex (that is less than start's tabindex), and
2594     // 2) comes last in the document, if there's a tie.
2595     startingTabIndex = (start && start->tabIndex()) ? start->tabIndex() : SHRT_MAX;
2596     return previousNodeWithLowerTabIndex(last, startingTabIndex, event);
2597 }
2598 
nodeAbsIndex(Node * node)2599 int Document::nodeAbsIndex(Node *node)
2600 {
2601     ASSERT(node->document() == this);
2602 
2603     int absIndex = 0;
2604     for (Node* n = node; n && n != this; n = n->traversePreviousNode())
2605         absIndex++;
2606     return absIndex;
2607 }
2608 
nodeWithAbsIndex(int absIndex)2609 Node* Document::nodeWithAbsIndex(int absIndex)
2610 {
2611     Node* n = this;
2612     for (int i = 0; n && (i < absIndex); i++)
2613         n = n->traverseNextNode();
2614     return n;
2615 }
2616 
2617 #ifdef ANDROID_META_SUPPORT
processMetadataSettings(const String & content)2618 void Document::processMetadataSettings(const String& content)
2619 {
2620     ASSERT(!content.isNull());
2621     processArguments(content, 0, 0);
2622 }
2623 #endif
2624 
processHttpEquiv(const String & equiv,const String & content)2625 void Document::processHttpEquiv(const String& equiv, const String& content)
2626 {
2627     ASSERT(!equiv.isNull() && !content.isNull());
2628 
2629     Frame* frame = this->frame();
2630 
2631     if (equalIgnoringCase(equiv, "default-style")) {
2632         // The preferred style set has been overridden as per section
2633         // 14.3.2 of the HTML4.0 specification.  We need to update the
2634         // sheet used variable and then update our style selector.
2635         // For more info, see the test at:
2636         // http://www.hixie.ch/tests/evil/css/import/main/preferred.html
2637         // -dwh
2638         m_selectedStylesheetSet = content;
2639         m_preferredStylesheetSet = content;
2640         styleSelectorChanged(DeferRecalcStyle);
2641     } else if (equalIgnoringCase(equiv, "refresh")) {
2642         double delay;
2643         String url;
2644         if (frame && parseHTTPRefresh(content, true, delay, url)) {
2645             if (url.isEmpty())
2646                 url = m_url.string();
2647             else
2648                 url = completeURL(url).string();
2649             frame->navigationScheduler()->scheduleRedirect(delay, url);
2650         }
2651     } else if (equalIgnoringCase(equiv, "set-cookie")) {
2652         // FIXME: make setCookie work on XML documents too; e.g. in case of <html:meta .....>
2653         if (isHTMLDocument()) {
2654             ExceptionCode ec; // Exception (for sandboxed documents) ignored.
2655             static_cast<HTMLDocument*>(this)->setCookie(content, ec);
2656         }
2657     } else if (equalIgnoringCase(equiv, "content-language"))
2658         setContentLanguage(content);
2659     else if (equalIgnoringCase(equiv, "x-dns-prefetch-control"))
2660         parseDNSPrefetchControlHeader(content);
2661     else if (equalIgnoringCase(equiv, "x-frame-options")) {
2662         if (frame) {
2663             FrameLoader* frameLoader = frame->loader();
2664             if (frameLoader->shouldInterruptLoadForXFrameOptions(content, url())) {
2665                 frameLoader->stopAllLoaders();
2666                 frame->navigationScheduler()->scheduleLocationChange(securityOrigin(), blankURL(), String());
2667 
2668                 DEFINE_STATIC_LOCAL(String, consoleMessage, ("Refused to display document because display forbidden by X-Frame-Options.\n"));
2669                 frame->domWindow()->console()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, consoleMessage, 1, String());
2670             }
2671         }
2672     } else if (equalIgnoringCase(equiv, "x-webkit-csp"))
2673         contentSecurityPolicy()->didReceiveHeader(content);
2674 }
2675 
2676 // Though isspace() considers \t and \v to be whitespace, Win IE doesn't.
isSeparator(UChar c)2677 static bool isSeparator(UChar c)
2678 {
2679     return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '=' || c == ',' || c == '\0';
2680 }
2681 
processArguments(const String & features,void * data,ArgumentsCallback callback)2682 void Document::processArguments(const String& features, void* data, ArgumentsCallback callback)
2683 {
2684     // Tread lightly in this code -- it was specifically designed to mimic Win IE's parsing behavior.
2685     int keyBegin, keyEnd;
2686     int valueBegin, valueEnd;
2687 
2688     int i = 0;
2689     int length = features.length();
2690     String buffer = features.lower();
2691     while (i < length) {
2692         // skip to first non-separator, but don't skip past the end of the string
2693         while (isSeparator(buffer[i])) {
2694             if (i >= length)
2695                 break;
2696             i++;
2697         }
2698         keyBegin = i;
2699 
2700         // skip to first separator
2701         while (!isSeparator(buffer[i]))
2702             i++;
2703         keyEnd = i;
2704 
2705         // skip to first '=', but don't skip past a ',' or the end of the string
2706         while (buffer[i] != '=') {
2707             if (buffer[i] == ',' || i >= length)
2708                 break;
2709             i++;
2710         }
2711 
2712         // skip to first non-separator, but don't skip past a ',' or the end of the string
2713         while (isSeparator(buffer[i])) {
2714             if (buffer[i] == ',' || i >= length)
2715                 break;
2716             i++;
2717         }
2718         valueBegin = i;
2719 
2720         // skip to first separator
2721         while (!isSeparator(buffer[i]))
2722             i++;
2723         valueEnd = i;
2724 
2725         ASSERT(i <= length);
2726 
2727         String keyString = buffer.substring(keyBegin, keyEnd - keyBegin);
2728         String valueString = buffer.substring(valueBegin, valueEnd - valueBegin);
2729 #ifdef ANDROID_META_SUPPORT
2730         if (frame())
2731             frame()->settings()->setMetadataSettings(keyString, valueString);
2732 #endif
2733         if (callback && data)
2734             callback(keyString, valueString, this, data);
2735     }
2736 }
2737 
processViewport(const String & features)2738 void Document::processViewport(const String& features)
2739 {
2740     ASSERT(!features.isNull());
2741 
2742     m_viewportArguments = ViewportArguments();
2743     processArguments(features, (void*)&m_viewportArguments, &setViewportFeature);
2744 
2745     Frame* frame = this->frame();
2746     if (!frame || !frame->page())
2747         return;
2748 
2749     frame->page()->updateViewportArguments();
2750 }
2751 
prepareMouseEvent(const HitTestRequest & request,const IntPoint & documentPoint,const PlatformMouseEvent & event)2752 MouseEventWithHitTestResults Document::prepareMouseEvent(const HitTestRequest& request, const IntPoint& documentPoint, const PlatformMouseEvent& event)
2753 {
2754     ASSERT(!renderer() || renderer()->isRenderView());
2755 
2756     if (!renderer())
2757         return MouseEventWithHitTestResults(event, HitTestResult(IntPoint()));
2758 
2759     HitTestResult result(documentPoint);
2760     renderView()->layer()->hitTest(request, result);
2761 
2762     if (!request.readOnly())
2763         updateStyleIfNeeded();
2764 
2765     return MouseEventWithHitTestResults(event, result);
2766 }
2767 
2768 // DOM Section 1.1.1
childTypeAllowed(NodeType type) const2769 bool Document::childTypeAllowed(NodeType type) const
2770 {
2771     switch (type) {
2772     case ATTRIBUTE_NODE:
2773     case CDATA_SECTION_NODE:
2774     case DOCUMENT_FRAGMENT_NODE:
2775     case DOCUMENT_NODE:
2776     case ENTITY_NODE:
2777     case ENTITY_REFERENCE_NODE:
2778     case NOTATION_NODE:
2779     case TEXT_NODE:
2780     case XPATH_NAMESPACE_NODE:
2781         return false;
2782     case COMMENT_NODE:
2783     case PROCESSING_INSTRUCTION_NODE:
2784         return true;
2785     case DOCUMENT_TYPE_NODE:
2786     case ELEMENT_NODE:
2787         // Documents may contain no more than one of each of these.
2788         // (One Element and one DocumentType.)
2789         for (Node* c = firstChild(); c; c = c->nextSibling())
2790             if (c->nodeType() == type)
2791                 return false;
2792         return true;
2793     }
2794     return false;
2795 }
2796 
canReplaceChild(Node * newChild,Node * oldChild)2797 bool Document::canReplaceChild(Node* newChild, Node* oldChild)
2798 {
2799     if (!oldChild)
2800         // ContainerNode::replaceChild will raise a NOT_FOUND_ERR.
2801         return true;
2802 
2803     if (oldChild->nodeType() == newChild->nodeType())
2804         return true;
2805 
2806     int numDoctypes = 0;
2807     int numElements = 0;
2808 
2809     // First, check how many doctypes and elements we have, not counting
2810     // the child we're about to remove.
2811     for (Node* c = firstChild(); c; c = c->nextSibling()) {
2812         if (c == oldChild)
2813             continue;
2814 
2815         switch (c->nodeType()) {
2816         case DOCUMENT_TYPE_NODE:
2817             numDoctypes++;
2818             break;
2819         case ELEMENT_NODE:
2820             numElements++;
2821             break;
2822         default:
2823             break;
2824         }
2825     }
2826 
2827     // Then, see how many doctypes and elements might be added by the new child.
2828     if (newChild->nodeType() == DOCUMENT_FRAGMENT_NODE) {
2829         for (Node* c = firstChild(); c; c = c->nextSibling()) {
2830             switch (c->nodeType()) {
2831             case ATTRIBUTE_NODE:
2832             case CDATA_SECTION_NODE:
2833             case DOCUMENT_FRAGMENT_NODE:
2834             case DOCUMENT_NODE:
2835             case ENTITY_NODE:
2836             case ENTITY_REFERENCE_NODE:
2837             case NOTATION_NODE:
2838             case TEXT_NODE:
2839             case XPATH_NAMESPACE_NODE:
2840                 return false;
2841             case COMMENT_NODE:
2842             case PROCESSING_INSTRUCTION_NODE:
2843                 break;
2844             case DOCUMENT_TYPE_NODE:
2845                 numDoctypes++;
2846                 break;
2847             case ELEMENT_NODE:
2848                 numElements++;
2849                 break;
2850             }
2851         }
2852     } else {
2853         switch (newChild->nodeType()) {
2854         case ATTRIBUTE_NODE:
2855         case CDATA_SECTION_NODE:
2856         case DOCUMENT_FRAGMENT_NODE:
2857         case DOCUMENT_NODE:
2858         case ENTITY_NODE:
2859         case ENTITY_REFERENCE_NODE:
2860         case NOTATION_NODE:
2861         case TEXT_NODE:
2862         case XPATH_NAMESPACE_NODE:
2863             return false;
2864         case COMMENT_NODE:
2865         case PROCESSING_INSTRUCTION_NODE:
2866             return true;
2867         case DOCUMENT_TYPE_NODE:
2868             numDoctypes++;
2869             break;
2870         case ELEMENT_NODE:
2871             numElements++;
2872             break;
2873         }
2874     }
2875 
2876     if (numElements > 1 || numDoctypes > 1)
2877         return false;
2878 
2879     return true;
2880 }
2881 
cloneNode(bool)2882 PassRefPtr<Node> Document::cloneNode(bool /*deep*/)
2883 {
2884     // Spec says cloning Document nodes is "implementation dependent"
2885     // so we do not support it...
2886     return 0;
2887 }
2888 
styleSheets()2889 StyleSheetList* Document::styleSheets()
2890 {
2891     return m_styleSheets.get();
2892 }
2893 
preferredStylesheetSet() const2894 String Document::preferredStylesheetSet() const
2895 {
2896     return m_preferredStylesheetSet;
2897 }
2898 
selectedStylesheetSet() const2899 String Document::selectedStylesheetSet() const
2900 {
2901     return m_selectedStylesheetSet;
2902 }
2903 
setSelectedStylesheetSet(const String & aString)2904 void Document::setSelectedStylesheetSet(const String& aString)
2905 {
2906     m_selectedStylesheetSet = aString;
2907     styleSelectorChanged(DeferRecalcStyle);
2908 }
2909 
2910 // This method is called whenever a top-level stylesheet has finished loading.
removePendingSheet()2911 void Document::removePendingSheet()
2912 {
2913     // Make sure we knew this sheet was pending, and that our count isn't out of sync.
2914     ASSERT(m_pendingStylesheets > 0);
2915 
2916     m_pendingStylesheets--;
2917 
2918 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2919     if (!ownerElement())
2920         printf("Stylesheet loaded at time %d. %d stylesheets still remain.\n", elapsedTime(), m_pendingStylesheets);
2921 #endif
2922 
2923     if (m_pendingStylesheets)
2924         return;
2925 
2926     styleSelectorChanged(RecalcStyleImmediately);
2927 
2928     if (ScriptableDocumentParser* parser = scriptableDocumentParser())
2929         parser->executeScriptsWaitingForStylesheets();
2930 
2931     if (m_gotoAnchorNeededAfterStylesheetsLoad && view())
2932         view()->scrollToFragment(m_url);
2933 }
2934 
styleSelectorChanged(StyleSelectorUpdateFlag updateFlag)2935 void Document::styleSelectorChanged(StyleSelectorUpdateFlag updateFlag)
2936 {
2937     // Don't bother updating, since we haven't loaded all our style info yet
2938     // and haven't calculated the style selector for the first time.
2939     if (!attached() || (!m_didCalculateStyleSelector && !haveStylesheetsLoaded()))
2940         return;
2941 
2942 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2943     if (!ownerElement())
2944         printf("Beginning update of style selector at time %d.\n", elapsedTime());
2945 #endif
2946 
2947     recalcStyleSelector();
2948 
2949     if (updateFlag == DeferRecalcStyle) {
2950         scheduleForcedStyleRecalc();
2951         return;
2952     }
2953 
2954     if (didLayoutWithPendingStylesheets() && m_pendingStylesheets <= 0) {
2955         m_pendingSheetLayout = IgnoreLayoutWithPendingSheets;
2956         if (renderer())
2957             renderer()->repaint();
2958     }
2959 
2960     // This recalcStyle initiates a new recalc cycle. We need to bracket it to
2961     // make sure animations get the correct update time
2962     if (m_frame)
2963         m_frame->animation()->beginAnimationUpdate();
2964     recalcStyle(Force);
2965     if (m_frame)
2966         m_frame->animation()->endAnimationUpdate();
2967 
2968 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2969     if (!ownerElement())
2970         printf("Finished update of style selector at time %d\n", elapsedTime());
2971 #endif
2972 
2973     if (renderer()) {
2974         renderer()->setNeedsLayoutAndPrefWidthsRecalc();
2975         if (view())
2976             view()->scheduleRelayout();
2977     }
2978 
2979     if (m_mediaQueryMatcher)
2980         m_mediaQueryMatcher->styleSelectorChanged();
2981 }
2982 
addStyleSheetCandidateNode(Node * node,bool createdByParser)2983 void Document::addStyleSheetCandidateNode(Node* node, bool createdByParser)
2984 {
2985     if (!node->inDocument())
2986         return;
2987 
2988     // Until the <body> exists, we have no choice but to compare document positions,
2989     // since styles outside of the body and head continue to be shunted into the head
2990     // (and thus can shift to end up before dynamically added DOM content that is also
2991     // outside the body).
2992     if ((createdByParser && body()) || m_styleSheetCandidateNodes.isEmpty()) {
2993         m_styleSheetCandidateNodes.add(node);
2994         return;
2995     }
2996 
2997     // Determine an appropriate insertion point.
2998     StyleSheetCandidateListHashSet::iterator begin = m_styleSheetCandidateNodes.begin();
2999     StyleSheetCandidateListHashSet::iterator end = m_styleSheetCandidateNodes.end();
3000     StyleSheetCandidateListHashSet::iterator it = end;
3001     Node* followingNode = 0;
3002     do {
3003         --it;
3004         Node* n = *it;
3005         unsigned short position = n->compareDocumentPosition(node);
3006         if (position == DOCUMENT_POSITION_FOLLOWING) {
3007             m_styleSheetCandidateNodes.insertBefore(followingNode, node);
3008             return;
3009         }
3010         followingNode = n;
3011     } while (it != begin);
3012 
3013     m_styleSheetCandidateNodes.insertBefore(followingNode, node);
3014 }
3015 
removeStyleSheetCandidateNode(Node * node)3016 void Document::removeStyleSheetCandidateNode(Node* node)
3017 {
3018     m_styleSheetCandidateNodes.remove(node);
3019 }
3020 
recalcStyleSelector()3021 void Document::recalcStyleSelector()
3022 {
3023     if (m_inStyleRecalc) {
3024         // SVG <use> element may manage to invalidate style selector in the middle of a style recalc.
3025         // https://bugs.webkit.org/show_bug.cgi?id=54344
3026         // FIXME: This should be fixed in SVG and this code replaced with ASSERT(!m_inStyleRecalc).
3027         m_hasDirtyStyleSelector = true;
3028         scheduleForcedStyleRecalc();
3029         return;
3030     }
3031     if (!renderer() || !attached())
3032         return;
3033 
3034     StyleSheetVector sheets;
3035 
3036     bool matchAuthorAndUserStyles = true;
3037     if (Settings* settings = this->settings())
3038         matchAuthorAndUserStyles = settings->authorAndUserStylesEnabled();
3039 
3040     StyleSheetCandidateListHashSet::iterator begin = m_styleSheetCandidateNodes.begin();
3041     StyleSheetCandidateListHashSet::iterator end = m_styleSheetCandidateNodes.end();
3042     if (!matchAuthorAndUserStyles)
3043         end = begin;
3044     for (StyleSheetCandidateListHashSet::iterator it = begin; it != end; ++it) {
3045         Node* n = *it;
3046 
3047         StyleSheet* sheet = 0;
3048 
3049         if (n->nodeType() == PROCESSING_INSTRUCTION_NODE) {
3050             // Processing instruction (XML documents only).
3051             // We don't support linking to embedded CSS stylesheets, see <https://bugs.webkit.org/show_bug.cgi?id=49281> for discussion.
3052             ProcessingInstruction* pi = static_cast<ProcessingInstruction*>(n);
3053             sheet = pi->sheet();
3054 #if ENABLE(XSLT)
3055             // Don't apply XSL transforms to already transformed documents -- <rdar://problem/4132806>
3056             if (pi->isXSL() && !transformSourceDocument()) {
3057                 // Don't apply XSL transforms until loading is finished.
3058                 if (!parsing())
3059                     applyXSLTransform(pi);
3060                 return;
3061             }
3062 #endif
3063         } else if ((n->isHTMLElement() && (n->hasTagName(linkTag) || n->hasTagName(styleTag)))
3064 #if ENABLE(SVG)
3065             ||  (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))
3066 #endif
3067         ) {
3068             Element* e = static_cast<Element*>(n);
3069             AtomicString title = e->getAttribute(titleAttr);
3070             bool enabledViaScript = false;
3071             if (e->hasLocalName(linkTag)) {
3072                 // <LINK> element
3073                 HTMLLinkElement* linkElement = static_cast<HTMLLinkElement*>(n);
3074                 if (linkElement->isDisabled())
3075                     continue;
3076                 enabledViaScript = linkElement->isEnabledViaScript();
3077                 if (linkElement->isLoading()) {
3078                     // it is loading but we should still decide which style sheet set to use
3079                     if (!enabledViaScript && !title.isEmpty() && m_preferredStylesheetSet.isEmpty()) {
3080                         const AtomicString& rel = e->getAttribute(relAttr);
3081                         if (!rel.contains("alternate")) {
3082                             m_preferredStylesheetSet = title;
3083                             m_selectedStylesheetSet = title;
3084                         }
3085                     }
3086                     continue;
3087                 }
3088                 if (!linkElement->sheet())
3089                     title = nullAtom;
3090             }
3091 
3092             // Get the current preferred styleset.  This is the
3093             // set of sheets that will be enabled.
3094 #if ENABLE(SVG)
3095             if (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))
3096                 sheet = static_cast<SVGStyleElement*>(n)->sheet();
3097             else
3098 #endif
3099             if (e->hasLocalName(linkTag))
3100                 sheet = static_cast<HTMLLinkElement*>(n)->sheet();
3101             else
3102                 // <STYLE> element
3103                 sheet = static_cast<HTMLStyleElement*>(n)->sheet();
3104 
3105             // Check to see if this sheet belongs to a styleset
3106             // (thus making it PREFERRED or ALTERNATE rather than
3107             // PERSISTENT).
3108             if (!enabledViaScript && !title.isEmpty()) {
3109                 // Yes, we have a title.
3110                 if (m_preferredStylesheetSet.isEmpty()) {
3111                     // No preferred set has been established.  If
3112                     // we are NOT an alternate sheet, then establish
3113                     // us as the preferred set.  Otherwise, just ignore
3114                     // this sheet.
3115                     AtomicString rel = e->getAttribute(relAttr);
3116                     if (e->hasLocalName(styleTag) || !rel.contains("alternate"))
3117                         m_preferredStylesheetSet = m_selectedStylesheetSet = title;
3118                 }
3119 
3120                 if (title != m_preferredStylesheetSet)
3121                     sheet = 0;
3122             }
3123         }
3124 
3125         if (sheet)
3126             sheets.append(sheet);
3127     }
3128 
3129     m_styleSheets->swap(sheets);
3130 
3131     m_styleSelector.clear();
3132     m_didCalculateStyleSelector = true;
3133     m_hasDirtyStyleSelector = false;
3134 }
3135 
setHoverNode(PassRefPtr<Node> newHoverNode)3136 void Document::setHoverNode(PassRefPtr<Node> newHoverNode)
3137 {
3138     m_hoverNode = newHoverNode;
3139 }
3140 
setActiveNode(PassRefPtr<Node> newActiveNode)3141 void Document::setActiveNode(PassRefPtr<Node> newActiveNode)
3142 {
3143     m_activeNode = newActiveNode;
3144 }
3145 
focusedNodeRemoved()3146 void Document::focusedNodeRemoved()
3147 {
3148     setFocusedNode(0);
3149 }
3150 
removeFocusedNodeOfSubtree(Node * node,bool amongChildrenOnly)3151 void Document::removeFocusedNodeOfSubtree(Node* node, bool amongChildrenOnly)
3152 {
3153     if (!m_focusedNode || this->inPageCache()) // If the document is in the page cache, then we don't need to clear out the focused node.
3154         return;
3155 
3156     bool nodeInSubtree = false;
3157     if (amongChildrenOnly)
3158         nodeInSubtree = m_focusedNode->isDescendantOf(node);
3159     else
3160         nodeInSubtree = (m_focusedNode == node) || m_focusedNode->isDescendantOf(node);
3161 
3162     if (nodeInSubtree)
3163         document()->focusedNodeRemoved();
3164 }
3165 
hoveredNodeDetached(Node * node)3166 void Document::hoveredNodeDetached(Node* node)
3167 {
3168     if (!m_hoverNode || (node != m_hoverNode && (!m_hoverNode->isTextNode() || node != m_hoverNode->parentNode())))
3169         return;
3170 
3171     m_hoverNode = node->parentNode();
3172     while (m_hoverNode && !m_hoverNode->renderer())
3173         m_hoverNode = m_hoverNode->parentNode();
3174     if (frame())
3175         frame()->eventHandler()->scheduleHoverStateUpdate();
3176 }
3177 
activeChainNodeDetached(Node * node)3178 void Document::activeChainNodeDetached(Node* node)
3179 {
3180     if (!m_activeNode || (node != m_activeNode && (!m_activeNode->isTextNode() || node != m_activeNode->parentNode())))
3181         return;
3182 
3183     m_activeNode = node->parentNode();
3184     while (m_activeNode && !m_activeNode->renderer())
3185         m_activeNode = m_activeNode->parentNode();
3186 }
3187 
3188 #if ENABLE(DASHBOARD_SUPPORT)
dashboardRegions() const3189 const Vector<DashboardRegionValue>& Document::dashboardRegions() const
3190 {
3191     return m_dashboardRegions;
3192 }
3193 
setDashboardRegions(const Vector<DashboardRegionValue> & regions)3194 void Document::setDashboardRegions(const Vector<DashboardRegionValue>& regions)
3195 {
3196     m_dashboardRegions = regions;
3197     setDashboardRegionsDirty(false);
3198 }
3199 #endif
3200 
setFocusedNode(PassRefPtr<Node> newFocusedNode)3201 bool Document::setFocusedNode(PassRefPtr<Node> newFocusedNode)
3202 {
3203     // Make sure newFocusedNode is actually in this document
3204     if (newFocusedNode && (newFocusedNode->document() != this))
3205         return true;
3206 
3207     if (m_focusedNode == newFocusedNode)
3208         return true;
3209 
3210     if (m_inPageCache)
3211         return false;
3212 
3213     bool focusChangeBlocked = false;
3214     RefPtr<Node> oldFocusedNode = m_focusedNode;
3215     m_focusedNode = 0;
3216 
3217     // Remove focus from the existing focus node (if any)
3218     if (oldFocusedNode && !oldFocusedNode->inDetach()) {
3219         if (oldFocusedNode->active())
3220             oldFocusedNode->setActive(false);
3221 
3222         oldFocusedNode->setFocus(false);
3223 
3224         // Dispatch a change event for text fields or textareas that have been edited
3225         if (oldFocusedNode->isElementNode()) {
3226             Element* element = static_cast<Element*>(oldFocusedNode.get());
3227             if (element->wasChangedSinceLastFormControlChangeEvent())
3228                 element->dispatchFormControlChangeEvent();
3229         }
3230 
3231         // Dispatch the blur event and let the node do any other blur related activities (important for text fields)
3232         oldFocusedNode->dispatchBlurEvent();
3233 
3234         if (m_focusedNode) {
3235             // handler shifted focus
3236             focusChangeBlocked = true;
3237             newFocusedNode = 0;
3238         }
3239 
3240         oldFocusedNode->dispatchUIEvent(eventNames().focusoutEvent, 0, 0); // DOM level 3 name for the bubbling blur event.
3241         // FIXME: We should remove firing DOMFocusOutEvent event when we are sure no content depends
3242         // on it, probably when <rdar://problem/8503958> is resolved.
3243         oldFocusedNode->dispatchUIEvent(eventNames().DOMFocusOutEvent, 0, 0); // DOM level 2 name for compatibility.
3244 
3245         if (m_focusedNode) {
3246             // handler shifted focus
3247             focusChangeBlocked = true;
3248             newFocusedNode = 0;
3249         }
3250         if (oldFocusedNode == this && oldFocusedNode->hasOneRef())
3251             return true;
3252 
3253         if (oldFocusedNode == oldFocusedNode->rootEditableElement())
3254             frame()->editor()->didEndEditing();
3255 
3256         if (view()) {
3257             Widget* oldWidget = widgetForNode(oldFocusedNode.get());
3258             if (oldWidget)
3259                 oldWidget->setFocus(false);
3260             else
3261                 view()->setFocus(false);
3262         }
3263     }
3264 
3265     if (newFocusedNode) {
3266         if (newFocusedNode == newFocusedNode->rootEditableElement() && !acceptsEditingFocus(newFocusedNode.get())) {
3267             // delegate blocks focus change
3268             focusChangeBlocked = true;
3269             goto SetFocusedNodeDone;
3270         }
3271         // Set focus on the new node
3272         m_focusedNode = newFocusedNode.get();
3273 
3274         // Dispatch the focus event and let the node do any other focus related activities (important for text fields)
3275         m_focusedNode->dispatchFocusEvent();
3276 
3277         if (m_focusedNode != newFocusedNode) {
3278             // handler shifted focus
3279             focusChangeBlocked = true;
3280             goto SetFocusedNodeDone;
3281         }
3282 
3283         m_focusedNode->dispatchUIEvent(eventNames().focusinEvent, 0, 0); // DOM level 3 bubbling focus event.
3284         // FIXME: We should remove firing DOMFocusInEvent event when we are sure no content depends
3285         // on it, probably when <rdar://problem/8503958> is resolved.
3286         m_focusedNode->dispatchUIEvent(eventNames().DOMFocusInEvent, 0, 0); // DOM level 2 for compatibility.
3287 
3288         if (m_focusedNode != newFocusedNode) {
3289             // handler shifted focus
3290             focusChangeBlocked = true;
3291             goto SetFocusedNodeDone;
3292         }
3293         m_focusedNode->setFocus(true);
3294 
3295         if (m_focusedNode == m_focusedNode->rootEditableElement())
3296             frame()->editor()->didBeginEditing();
3297 
3298         // eww, I suck. set the qt focus correctly
3299         // ### find a better place in the code for this
3300         if (view()) {
3301             Widget* focusWidget = widgetForNode(m_focusedNode.get());
3302             if (focusWidget) {
3303                 // Make sure a widget has the right size before giving it focus.
3304                 // Otherwise, we are testing edge cases of the Widget code.
3305                 // Specifically, in WebCore this does not work well for text fields.
3306                 updateLayout();
3307                 // Re-get the widget in case updating the layout changed things.
3308                 focusWidget = widgetForNode(m_focusedNode.get());
3309             }
3310             if (focusWidget)
3311                 focusWidget->setFocus(true);
3312             else
3313                 view()->setFocus(true);
3314         }
3315     }
3316 
3317 #if PLATFORM(MAC) || PLATFORM(WIN) || PLATFORM(GTK) || PLATFORM(CHROMIUM)
3318     if (!focusChangeBlocked && m_focusedNode && AXObjectCache::accessibilityEnabled()) {
3319         RenderObject* oldFocusedRenderer = 0;
3320         RenderObject* newFocusedRenderer = 0;
3321 
3322         if (oldFocusedNode)
3323             oldFocusedRenderer = oldFocusedNode->renderer();
3324         if (newFocusedNode)
3325             newFocusedRenderer = newFocusedNode->renderer();
3326 
3327         axObjectCache()->handleFocusedUIElementChanged(oldFocusedRenderer, newFocusedRenderer);
3328     }
3329 #endif
3330     if (!focusChangeBlocked)
3331         page()->chrome()->focusedNodeChanged(m_focusedNode.get());
3332 
3333 SetFocusedNodeDone:
3334     updateStyleIfNeeded();
3335     return !focusChangeBlocked;
3336 }
3337 
getFocusableNodes(Vector<RefPtr<Node>> & nodes)3338 void Document::getFocusableNodes(Vector<RefPtr<Node> >& nodes)
3339 {
3340     updateLayout();
3341 
3342     for (Node* node = firstChild(); node; node = node->traverseNextNode()) {
3343         if (node->isFocusable())
3344             nodes.append(node);
3345     }
3346 }
3347 
setCSSTarget(Element * n)3348 void Document::setCSSTarget(Element* n)
3349 {
3350     if (m_cssTarget)
3351         m_cssTarget->setNeedsStyleRecalc();
3352     m_cssTarget = n;
3353     if (n)
3354         n->setNeedsStyleRecalc();
3355 }
3356 
attachNodeIterator(NodeIterator * ni)3357 void Document::attachNodeIterator(NodeIterator* ni)
3358 {
3359     m_nodeIterators.add(ni);
3360 }
3361 
detachNodeIterator(NodeIterator * ni)3362 void Document::detachNodeIterator(NodeIterator* ni)
3363 {
3364     // The node iterator can be detached without having been attached if its root node didn't have a document
3365     // when the iterator was created, but has it now.
3366     m_nodeIterators.remove(ni);
3367 }
3368 
moveNodeIteratorsToNewDocument(Node * node,Document * newDocument)3369 void Document::moveNodeIteratorsToNewDocument(Node* node, Document* newDocument)
3370 {
3371     HashSet<NodeIterator*> nodeIteratorsList = m_nodeIterators;
3372     HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = nodeIteratorsList.end();
3373     for (HashSet<NodeIterator*>::const_iterator it = nodeIteratorsList.begin(); it != nodeIteratorsEnd; ++it) {
3374         if ((*it)->root() == node) {
3375             detachNodeIterator(*it);
3376             newDocument->attachNodeIterator(*it);
3377         }
3378     }
3379 }
3380 
nodeChildrenChanged(ContainerNode * container)3381 void Document::nodeChildrenChanged(ContainerNode* container)
3382 {
3383     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3384         HashSet<Range*>::const_iterator end = m_ranges.end();
3385         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3386             (*it)->nodeChildrenChanged(container);
3387     }
3388 }
3389 
nodeChildrenWillBeRemoved(ContainerNode * container)3390 void Document::nodeChildrenWillBeRemoved(ContainerNode* container)
3391 {
3392     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3393         HashSet<Range*>::const_iterator end = m_ranges.end();
3394         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3395             (*it)->nodeChildrenWillBeRemoved(container);
3396     }
3397 
3398     HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = m_nodeIterators.end();
3399     for (HashSet<NodeIterator*>::const_iterator it = m_nodeIterators.begin(); it != nodeIteratorsEnd; ++it) {
3400         for (Node* n = container->firstChild(); n; n = n->nextSibling())
3401             (*it)->nodeWillBeRemoved(n);
3402     }
3403 
3404     if (Frame* frame = this->frame()) {
3405         for (Node* n = container->firstChild(); n; n = n->nextSibling()) {
3406             frame->selection()->nodeWillBeRemoved(n);
3407             frame->page()->dragCaretController()->nodeWillBeRemoved(n);
3408         }
3409     }
3410 }
3411 
nodeWillBeRemoved(Node * n)3412 void Document::nodeWillBeRemoved(Node* n)
3413 {
3414     HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = m_nodeIterators.end();
3415     for (HashSet<NodeIterator*>::const_iterator it = m_nodeIterators.begin(); it != nodeIteratorsEnd; ++it)
3416         (*it)->nodeWillBeRemoved(n);
3417 
3418     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3419         HashSet<Range*>::const_iterator rangesEnd = m_ranges.end();
3420         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != rangesEnd; ++it)
3421             (*it)->nodeWillBeRemoved(n);
3422     }
3423 
3424     if (Frame* frame = this->frame()) {
3425         frame->selection()->nodeWillBeRemoved(n);
3426         frame->page()->dragCaretController()->nodeWillBeRemoved(n);
3427     }
3428 
3429 #if ENABLE(FULLSCREEN_API)
3430     // If the current full screen element or any of its ancestors is removed, set the current
3431     // full screen element to the document root, and fire a fullscreenchange event to inform
3432     // clients of the DOM.
3433     ASSERT(n);
3434     if (n->contains(m_fullScreenElement.get())) {
3435         ASSERT(n != documentElement());
3436 
3437         if (m_fullScreenRenderer)
3438             m_fullScreenRenderer->remove();
3439 
3440         setFullScreenRenderer(0);
3441         m_fullScreenElement = documentElement();
3442         recalcStyle(Force);
3443         m_fullScreenChangeDelayTimer.startOneShot(0);
3444     }
3445 #endif
3446 }
3447 
textInserted(Node * text,unsigned offset,unsigned length)3448 void Document::textInserted(Node* text, unsigned offset, unsigned length)
3449 {
3450     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3451         HashSet<Range*>::const_iterator end = m_ranges.end();
3452         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3453             (*it)->textInserted(text, offset, length);
3454     }
3455 
3456     // Update the markers for spelling and grammar checking.
3457     m_markers->shiftMarkers(text, offset, length);
3458 }
3459 
textRemoved(Node * text,unsigned offset,unsigned length)3460 void Document::textRemoved(Node* text, unsigned offset, unsigned length)
3461 {
3462     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3463         HashSet<Range*>::const_iterator end = m_ranges.end();
3464         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3465             (*it)->textRemoved(text, offset, length);
3466     }
3467 
3468     // Update the markers for spelling and grammar checking.
3469     m_markers->removeMarkers(text, offset, length);
3470     m_markers->shiftMarkers(text, offset + length, 0 - length);
3471 }
3472 
textNodesMerged(Text * oldNode,unsigned offset)3473 void Document::textNodesMerged(Text* oldNode, unsigned offset)
3474 {
3475     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3476         NodeWithIndex oldNodeWithIndex(oldNode);
3477         HashSet<Range*>::const_iterator end = m_ranges.end();
3478         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3479             (*it)->textNodesMerged(oldNodeWithIndex, offset);
3480     }
3481 
3482     // FIXME: This should update markers for spelling and grammar checking.
3483 }
3484 
textNodeSplit(Text * oldNode)3485 void Document::textNodeSplit(Text* oldNode)
3486 {
3487     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3488         HashSet<Range*>::const_iterator end = m_ranges.end();
3489         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3490             (*it)->textNodeSplit(oldNode);
3491     }
3492 
3493     // FIXME: This should update markers for spelling and grammar checking.
3494 }
3495 
3496 // FIXME: eventually, this should return a DOMWindow stored in the document.
domWindow() const3497 DOMWindow* Document::domWindow() const
3498 {
3499     if (!frame())
3500         return 0;
3501 
3502     // The m_frame pointer is not (not always?) zeroed out when the document is put into b/f cache, so the frame can hold an unrelated document/window pair.
3503     // FIXME: We should always zero out the frame pointer on navigation to avoid accidentally accessing the new frame content.
3504     if (m_frame->document() != this)
3505         return 0;
3506 
3507     return frame()->domWindow();
3508 }
3509 
setWindowAttributeEventListener(const AtomicString & eventType,PassRefPtr<EventListener> listener)3510 void Document::setWindowAttributeEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener)
3511 {
3512     DOMWindow* domWindow = this->domWindow();
3513     if (!domWindow)
3514         return;
3515     domWindow->setAttributeEventListener(eventType, listener);
3516 }
3517 
getWindowAttributeEventListener(const AtomicString & eventType)3518 EventListener* Document::getWindowAttributeEventListener(const AtomicString& eventType)
3519 {
3520     DOMWindow* domWindow = this->domWindow();
3521     if (!domWindow)
3522         return 0;
3523     return domWindow->getAttributeEventListener(eventType);
3524 }
3525 
dispatchWindowEvent(PassRefPtr<Event> event,PassRefPtr<EventTarget> target)3526 void Document::dispatchWindowEvent(PassRefPtr<Event> event,  PassRefPtr<EventTarget> target)
3527 {
3528     ASSERT(!eventDispatchForbidden());
3529     DOMWindow* domWindow = this->domWindow();
3530     if (!domWindow)
3531         return;
3532     domWindow->dispatchEvent(event, target);
3533 }
3534 
dispatchWindowLoadEvent()3535 void Document::dispatchWindowLoadEvent()
3536 {
3537     ASSERT(!eventDispatchForbidden());
3538     DOMWindow* domWindow = this->domWindow();
3539     if (!domWindow)
3540         return;
3541     domWindow->dispatchLoadEvent();
3542 }
3543 
enqueueWindowEvent(PassRefPtr<Event> event)3544 void Document::enqueueWindowEvent(PassRefPtr<Event> event)
3545 {
3546     event->setTarget(domWindow());
3547     m_eventQueue->enqueueEvent(event);
3548 }
3549 
enqueueDocumentEvent(PassRefPtr<Event> event)3550 void Document::enqueueDocumentEvent(PassRefPtr<Event> event)
3551 {
3552     event->setTarget(this);
3553     m_eventQueue->enqueueEvent(event);
3554 }
3555 
createEvent(const String & eventType,ExceptionCode & ec)3556 PassRefPtr<Event> Document::createEvent(const String& eventType, ExceptionCode& ec)
3557 {
3558     RefPtr<Event> event;
3559     if (eventType == "Event" || eventType == "Events" || eventType == "HTMLEvents")
3560         event = Event::create();
3561     else if (eventType == "CustomEvent")
3562         event = CustomEvent::create();
3563     else if (eventType == "KeyboardEvent" || eventType == "KeyboardEvents")
3564         event = KeyboardEvent::create();
3565     else if (eventType == "MessageEvent")
3566         event = MessageEvent::create();
3567     else if (eventType == "MouseEvent" || eventType == "MouseEvents")
3568         event = MouseEvent::create();
3569     else if (eventType == "MutationEvent" || eventType == "MutationEvents")
3570         event = MutationEvent::create();
3571     else if (eventType == "OverflowEvent")
3572         event = OverflowEvent::create();
3573     else if (eventType == "PageTransitionEvent")
3574         event = PageTransitionEvent::create();
3575     else if (eventType == "ProgressEvent")
3576         event = ProgressEvent::create();
3577 #if ENABLE(DOM_STORAGE)
3578     else if (eventType == "StorageEvent")
3579         event = StorageEvent::create();
3580 #endif
3581     else if (eventType == "TextEvent")
3582         event = TextEvent::create();
3583     else if (eventType == "UIEvent" || eventType == "UIEvents")
3584         event = UIEvent::create();
3585     else if (eventType == "WebKitAnimationEvent")
3586         event = WebKitAnimationEvent::create();
3587     else if (eventType == "WebKitTransitionEvent")
3588         event = WebKitTransitionEvent::create();
3589     else if (eventType == "WheelEvent")
3590         event = WheelEvent::create();
3591 #if ENABLE(SVG)
3592     else if (eventType == "SVGEvents")
3593         event = Event::create();
3594     else if (eventType == "SVGZoomEvents")
3595         event = SVGZoomEvent::create();
3596 #endif
3597 #if ENABLE(TOUCH_EVENTS)
3598 #if USE(V8)
3599     else if (eventType == "TouchEvent" && RuntimeEnabledFeatures::touchEnabled())
3600 #else
3601     else if (eventType == "TouchEvent")
3602 #endif
3603         event = TouchEvent::create();
3604 #endif
3605 #if ENABLE(DEVICE_ORIENTATION)
3606     else if (eventType == "DeviceMotionEvent")
3607         event = DeviceMotionEvent::create();
3608     else if (eventType == "DeviceOrientationEvent")
3609         event = DeviceOrientationEvent::create();
3610 #endif
3611 #if ENABLE(ORIENTATION_EVENTS)
3612     else if (eventType == "OrientationEvent")
3613         event = Event::create();
3614 #endif
3615     if (event)
3616         return event.release();
3617 
3618     ec = NOT_SUPPORTED_ERR;
3619     return 0;
3620 }
3621 
addListenerTypeIfNeeded(const AtomicString & eventType)3622 void Document::addListenerTypeIfNeeded(const AtomicString& eventType)
3623 {
3624     if (eventType == eventNames().DOMSubtreeModifiedEvent)
3625         addListenerType(DOMSUBTREEMODIFIED_LISTENER);
3626     else if (eventType == eventNames().DOMNodeInsertedEvent)
3627         addListenerType(DOMNODEINSERTED_LISTENER);
3628     else if (eventType == eventNames().DOMNodeRemovedEvent)
3629         addListenerType(DOMNODEREMOVED_LISTENER);
3630     else if (eventType == eventNames().DOMNodeRemovedFromDocumentEvent)
3631         addListenerType(DOMNODEREMOVEDFROMDOCUMENT_LISTENER);
3632     else if (eventType == eventNames().DOMNodeInsertedIntoDocumentEvent)
3633         addListenerType(DOMNODEINSERTEDINTODOCUMENT_LISTENER);
3634     else if (eventType == eventNames().DOMAttrModifiedEvent)
3635         addListenerType(DOMATTRMODIFIED_LISTENER);
3636     else if (eventType == eventNames().DOMCharacterDataModifiedEvent)
3637         addListenerType(DOMCHARACTERDATAMODIFIED_LISTENER);
3638     else if (eventType == eventNames().overflowchangedEvent)
3639         addListenerType(OVERFLOWCHANGED_LISTENER);
3640     else if (eventType == eventNames().webkitAnimationStartEvent)
3641         addListenerType(ANIMATIONSTART_LISTENER);
3642     else if (eventType == eventNames().webkitAnimationEndEvent)
3643         addListenerType(ANIMATIONEND_LISTENER);
3644     else if (eventType == eventNames().webkitAnimationIterationEvent)
3645         addListenerType(ANIMATIONITERATION_LISTENER);
3646     else if (eventType == eventNames().webkitTransitionEndEvent)
3647         addListenerType(TRANSITIONEND_LISTENER);
3648     else if (eventType == eventNames().beforeloadEvent)
3649         addListenerType(BEFORELOAD_LISTENER);
3650     else if (eventType == eventNames().beforeprocessEvent)
3651         addListenerType(BEFOREPROCESS_LISTENER);
3652 #if ENABLE(TOUCH_EVENTS)
3653     else if (eventType == eventNames().touchstartEvent
3654              || eventType == eventNames().touchmoveEvent
3655              || eventType == eventNames().touchendEvent
3656              || eventType == eventNames().touchcancelEvent) {
3657         addListenerType(TOUCH_LISTENER);
3658         if (Page* page = this->page())
3659             page->chrome()->client()->needTouchEvents(true);
3660     }
3661 #endif
3662 }
3663 
getOverrideStyle(Element *,const String &)3664 CSSStyleDeclaration* Document::getOverrideStyle(Element*, const String&)
3665 {
3666     return 0;
3667 }
3668 
ownerElement() const3669 HTMLFrameOwnerElement* Document::ownerElement() const
3670 {
3671     if (!frame())
3672         return 0;
3673     return frame()->ownerElement();
3674 }
3675 
cookie(ExceptionCode & ec) const3676 String Document::cookie(ExceptionCode& ec) const
3677 {
3678     if (page() && !page()->cookieEnabled())
3679         return String();
3680 
3681     // FIXME: The HTML5 DOM spec states that this attribute can raise an
3682     // INVALID_STATE_ERR exception on getting if the Document has no
3683     // browsing context.
3684 
3685     if (!securityOrigin()->canAccessCookies()) {
3686         ec = SECURITY_ERR;
3687         return String();
3688     }
3689 
3690     KURL cookieURL = this->cookieURL();
3691     if (cookieURL.isEmpty())
3692         return String();
3693 
3694     return cookies(this, cookieURL);
3695 }
3696 
setCookie(const String & value,ExceptionCode & ec)3697 void Document::setCookie(const String& value, ExceptionCode& ec)
3698 {
3699     if (page() && !page()->cookieEnabled())
3700         return;
3701 
3702     // FIXME: The HTML5 DOM spec states that this attribute can raise an
3703     // INVALID_STATE_ERR exception on setting if the Document has no
3704     // browsing context.
3705 
3706     if (!securityOrigin()->canAccessCookies()) {
3707         ec = SECURITY_ERR;
3708         return;
3709     }
3710 
3711     KURL cookieURL = this->cookieURL();
3712     if (cookieURL.isEmpty())
3713         return;
3714 
3715     setCookies(this, cookieURL, value);
3716 }
3717 
referrer() const3718 String Document::referrer() const
3719 {
3720     if (frame())
3721         return frame()->loader()->referrer();
3722     return String();
3723 }
3724 
domain() const3725 String Document::domain() const
3726 {
3727     return securityOrigin()->domain();
3728 }
3729 
setDomain(const String & newDomain,ExceptionCode & ec)3730 void Document::setDomain(const String& newDomain, ExceptionCode& ec)
3731 {
3732     if (SecurityOrigin::isDomainRelaxationForbiddenForURLScheme(securityOrigin()->protocol())) {
3733         ec = SECURITY_ERR;
3734         return;
3735     }
3736 
3737     // Both NS and IE specify that changing the domain is only allowed when
3738     // the new domain is a suffix of the old domain.
3739 
3740     // FIXME: We should add logging indicating why a domain was not allowed.
3741 
3742     // If the new domain is the same as the old domain, still call
3743     // securityOrigin()->setDomainForDOM. This will change the
3744     // security check behavior. For example, if a page loaded on port 8000
3745     // assigns its current domain using document.domain, the page will
3746     // allow other pages loaded on different ports in the same domain that
3747     // have also assigned to access this page.
3748     if (equalIgnoringCase(domain(), newDomain)) {
3749         securityOrigin()->setDomainFromDOM(newDomain);
3750         if (m_frame)
3751             m_frame->script()->updateSecurityOrigin();
3752         return;
3753     }
3754 
3755     int oldLength = domain().length();
3756     int newLength = newDomain.length();
3757     // e.g. newDomain = webkit.org (10) and domain() = www.webkit.org (14)
3758     if (newLength >= oldLength) {
3759         ec = SECURITY_ERR;
3760         return;
3761     }
3762 
3763     String test = domain();
3764     // Check that it's a subdomain, not e.g. "ebkit.org"
3765     if (test[oldLength - newLength - 1] != '.') {
3766         ec = SECURITY_ERR;
3767         return;
3768     }
3769 
3770     // Now test is "webkit.org" from domain()
3771     // and we check that it's the same thing as newDomain
3772     test.remove(0, oldLength - newLength);
3773     if (test != newDomain) {
3774         ec = SECURITY_ERR;
3775         return;
3776     }
3777 
3778     securityOrigin()->setDomainFromDOM(newDomain);
3779     if (m_frame)
3780         m_frame->script()->updateSecurityOrigin();
3781 }
3782 
3783 // http://www.whatwg.org/specs/web-apps/current-work/#dom-document-lastmodified
lastModified() const3784 String Document::lastModified() const
3785 {
3786     DateComponents date;
3787     bool foundDate = false;
3788     if (m_frame) {
3789         String httpLastModified;
3790         if (DocumentLoader* documentLoader = loader())
3791             httpLastModified = documentLoader->response().httpHeaderField("Last-Modified");
3792         if (!httpLastModified.isEmpty()) {
3793             date.setMillisecondsSinceEpochForDateTime(parseDate(httpLastModified));
3794             foundDate = true;
3795         }
3796     }
3797     // FIXME: If this document came from the file system, the HTML5
3798     // specificiation tells us to read the last modification date from the file
3799     // system.
3800     if (!foundDate)
3801         date.setMillisecondsSinceEpochForDateTime(currentTimeMS());
3802     return String::format("%02d/%02d/%04d %02d:%02d:%02d", date.month() + 1, date.monthDay(), date.fullYear(), date.hour(), date.minute(), date.second());
3803 }
3804 
isValidNameNonASCII(const UChar * characters,unsigned length)3805 static bool isValidNameNonASCII(const UChar* characters, unsigned length)
3806 {
3807     unsigned i = 0;
3808 
3809     UChar32 c;
3810     U16_NEXT(characters, i, length, c)
3811     if (!isValidNameStart(c))
3812         return false;
3813 
3814     while (i < length) {
3815         U16_NEXT(characters, i, length, c)
3816         if (!isValidNamePart(c))
3817             return false;
3818     }
3819 
3820     return true;
3821 }
3822 
isValidNameASCII(const UChar * characters,unsigned length)3823 static inline bool isValidNameASCII(const UChar* characters, unsigned length)
3824 {
3825     UChar c = characters[0];
3826     if (!(isASCIIAlpha(c) || c == ':' || c == '_'))
3827         return false;
3828 
3829     for (unsigned i = 1; i < length; ++i) {
3830         c = characters[i];
3831         if (!(isASCIIAlphanumeric(c) || c == ':' || c == '_' || c == '-' || c == '.'))
3832             return false;
3833     }
3834 
3835     return true;
3836 }
3837 
isValidName(const String & name)3838 bool Document::isValidName(const String& name)
3839 {
3840     unsigned length = name.length();
3841     if (!length)
3842         return false;
3843 
3844     const UChar* characters = name.characters();
3845     return isValidNameASCII(characters, length) || isValidNameNonASCII(characters, length);
3846 }
3847 
parseQualifiedName(const String & qualifiedName,String & prefix,String & localName,ExceptionCode & ec)3848 bool Document::parseQualifiedName(const String& qualifiedName, String& prefix, String& localName, ExceptionCode& ec)
3849 {
3850     unsigned length = qualifiedName.length();
3851 
3852     if (!length) {
3853         ec = INVALID_CHARACTER_ERR;
3854         return false;
3855     }
3856 
3857     bool nameStart = true;
3858     bool sawColon = false;
3859     int colonPos = 0;
3860 
3861     const UChar* s = qualifiedName.characters();
3862     for (unsigned i = 0; i < length;) {
3863         UChar32 c;
3864         U16_NEXT(s, i, length, c)
3865         if (c == ':') {
3866             if (sawColon) {
3867                 ec = NAMESPACE_ERR;
3868                 return false; // multiple colons: not allowed
3869             }
3870             nameStart = true;
3871             sawColon = true;
3872             colonPos = i - 1;
3873         } else if (nameStart) {
3874             if (!isValidNameStart(c)) {
3875                 ec = INVALID_CHARACTER_ERR;
3876                 return false;
3877             }
3878             nameStart = false;
3879         } else {
3880             if (!isValidNamePart(c)) {
3881                 ec = INVALID_CHARACTER_ERR;
3882                 return false;
3883             }
3884         }
3885     }
3886 
3887     if (!sawColon) {
3888         prefix = String();
3889         localName = qualifiedName;
3890     } else {
3891         prefix = qualifiedName.substring(0, colonPos);
3892         if (prefix.isEmpty()) {
3893             ec = NAMESPACE_ERR;
3894             return false;
3895         }
3896         localName = qualifiedName.substring(colonPos + 1);
3897     }
3898 
3899     if (localName.isEmpty()) {
3900         ec = NAMESPACE_ERR;
3901         return false;
3902     }
3903 
3904     return true;
3905 }
3906 
setDecoder(PassRefPtr<TextResourceDecoder> decoder)3907 void Document::setDecoder(PassRefPtr<TextResourceDecoder> decoder)
3908 {
3909     m_decoder = decoder;
3910 }
3911 
completeURL(const String & url) const3912 KURL Document::completeURL(const String& url) const
3913 {
3914     // Always return a null URL when passed a null string.
3915     // FIXME: Should we change the KURL constructor to have this behavior?
3916     // See also [CSS]StyleSheet::completeURL(const String&)
3917     if (url.isNull())
3918         return KURL();
3919     const KURL& baseURL = ((m_baseURL.isEmpty() || m_baseURL == blankURL()) && parentDocument()) ? parentDocument()->baseURL() : m_baseURL;
3920     if (!m_decoder)
3921         return KURL(baseURL, url);
3922     return KURL(baseURL, url, m_decoder->encoding());
3923 }
3924 
setInPageCache(bool flag)3925 void Document::setInPageCache(bool flag)
3926 {
3927     if (m_inPageCache == flag)
3928         return;
3929 
3930     m_inPageCache = flag;
3931     if (flag) {
3932         ASSERT(!m_savedRenderer);
3933         m_savedRenderer = renderer();
3934         if (FrameView* v = view())
3935             v->resetScrollbarsAndClearContentsSize();
3936         m_styleRecalcTimer.stop();
3937     } else {
3938         ASSERT(!renderer() || renderer() == m_savedRenderer);
3939         ASSERT(m_renderArena);
3940         setRenderer(m_savedRenderer);
3941         m_savedRenderer = 0;
3942 
3943         if (frame() && frame()->page())
3944             frame()->page()->updateViewportArguments();
3945 
3946         if (childNeedsStyleRecalc())
3947             scheduleStyleRecalc();
3948     }
3949 }
3950 
documentWillBecomeInactive()3951 void Document::documentWillBecomeInactive()
3952 {
3953 #if USE(ACCELERATED_COMPOSITING)
3954     if (renderer())
3955         renderView()->willMoveOffscreen();
3956 #endif
3957 
3958     HashSet<Element*>::iterator end = m_documentActivationCallbackElements.end();
3959     for (HashSet<Element*>::iterator i = m_documentActivationCallbackElements.begin(); i != end; ++i)
3960         (*i)->documentWillBecomeInactive();
3961 }
3962 
documentDidBecomeActive()3963 void Document::documentDidBecomeActive()
3964 {
3965     HashSet<Element*>::iterator end = m_documentActivationCallbackElements.end();
3966     for (HashSet<Element*>::iterator i = m_documentActivationCallbackElements.begin(); i != end; ++i)
3967         (*i)->documentDidBecomeActive();
3968 
3969 #if USE(ACCELERATED_COMPOSITING)
3970     if (renderer())
3971         renderView()->didMoveOnscreen();
3972 #endif
3973 
3974     ASSERT(m_frame);
3975     m_frame->loader()->client()->dispatchDidBecomeFrameset(isFrameSet());
3976 }
3977 
registerForDocumentActivationCallbacks(Element * e)3978 void Document::registerForDocumentActivationCallbacks(Element* e)
3979 {
3980     m_documentActivationCallbackElements.add(e);
3981 }
3982 
unregisterForDocumentActivationCallbacks(Element * e)3983 void Document::unregisterForDocumentActivationCallbacks(Element* e)
3984 {
3985     m_documentActivationCallbackElements.remove(e);
3986 }
3987 
mediaVolumeDidChange()3988 void Document::mediaVolumeDidChange()
3989 {
3990     HashSet<Element*>::iterator end = m_mediaVolumeCallbackElements.end();
3991     for (HashSet<Element*>::iterator i = m_mediaVolumeCallbackElements.begin(); i != end; ++i)
3992         (*i)->mediaVolumeDidChange();
3993 }
3994 
registerForMediaVolumeCallbacks(Element * e)3995 void Document::registerForMediaVolumeCallbacks(Element* e)
3996 {
3997     m_mediaVolumeCallbackElements.add(e);
3998 }
3999 
unregisterForMediaVolumeCallbacks(Element * e)4000 void Document::unregisterForMediaVolumeCallbacks(Element* e)
4001 {
4002     m_mediaVolumeCallbackElements.remove(e);
4003 }
4004 
privateBrowsingStateDidChange()4005 void Document::privateBrowsingStateDidChange()
4006 {
4007     HashSet<Element*>::iterator end = m_privateBrowsingStateChangedElements.end();
4008     for (HashSet<Element*>::iterator it = m_privateBrowsingStateChangedElements.begin(); it != end; ++it)
4009         (*it)->privateBrowsingStateDidChange();
4010 }
4011 
registerForPrivateBrowsingStateChangedCallbacks(Element * e)4012 void Document::registerForPrivateBrowsingStateChangedCallbacks(Element* e)
4013 {
4014     m_privateBrowsingStateChangedElements.add(e);
4015 }
4016 
unregisterForPrivateBrowsingStateChangedCallbacks(Element * e)4017 void Document::unregisterForPrivateBrowsingStateChangedCallbacks(Element* e)
4018 {
4019     m_privateBrowsingStateChangedElements.remove(e);
4020 }
4021 
setShouldCreateRenderers(bool f)4022 void Document::setShouldCreateRenderers(bool f)
4023 {
4024     m_createRenderers = f;
4025 }
4026 
shouldCreateRenderers()4027 bool Document::shouldCreateRenderers()
4028 {
4029     return m_createRenderers;
4030 }
4031 
4032 // Support for Javascript execCommand, and related methods
4033 
command(Document * document,const String & commandName,bool userInterface=false)4034 static Editor::Command command(Document* document, const String& commandName, bool userInterface = false)
4035 {
4036     Frame* frame = document->frame();
4037     if (!frame || frame->document() != document)
4038         return Editor::Command();
4039 
4040     document->updateStyleIfNeeded();
4041 
4042     return frame->editor()->command(commandName,
4043         userInterface ? CommandFromDOMWithUserInterface : CommandFromDOM);
4044 }
4045 
execCommand(const String & commandName,bool userInterface,const String & value)4046 bool Document::execCommand(const String& commandName, bool userInterface, const String& value)
4047 {
4048     return command(this, commandName, userInterface).execute(value);
4049 }
4050 
queryCommandEnabled(const String & commandName)4051 bool Document::queryCommandEnabled(const String& commandName)
4052 {
4053     return command(this, commandName).isEnabled();
4054 }
4055 
queryCommandIndeterm(const String & commandName)4056 bool Document::queryCommandIndeterm(const String& commandName)
4057 {
4058     return command(this, commandName).state() == MixedTriState;
4059 }
4060 
queryCommandState(const String & commandName)4061 bool Document::queryCommandState(const String& commandName)
4062 {
4063     return command(this, commandName).state() == TrueTriState;
4064 }
4065 
queryCommandSupported(const String & commandName)4066 bool Document::queryCommandSupported(const String& commandName)
4067 {
4068     return command(this, commandName).isSupported();
4069 }
4070 
queryCommandValue(const String & commandName)4071 String Document::queryCommandValue(const String& commandName)
4072 {
4073     return command(this, commandName).value();
4074 }
4075 
4076 #if ENABLE(XSLT)
4077 
applyXSLTransform(ProcessingInstruction * pi)4078 void Document::applyXSLTransform(ProcessingInstruction* pi)
4079 {
4080     RefPtr<XSLTProcessor> processor = XSLTProcessor::create();
4081     processor->setXSLStyleSheet(static_cast<XSLStyleSheet*>(pi->sheet()));
4082     String resultMIMEType;
4083     String newSource;
4084     String resultEncoding;
4085     if (!processor->transformToString(this, resultMIMEType, newSource, resultEncoding))
4086         return;
4087     // FIXME: If the transform failed we should probably report an error (like Mozilla does).
4088     processor->createDocumentFromSource(newSource, resultEncoding, resultMIMEType, this, frame());
4089 }
4090 
setTransformSource(PassOwnPtr<TransformSource> source)4091 void Document::setTransformSource(PassOwnPtr<TransformSource> source)
4092 {
4093     if (m_transformSource == source)
4094         return;
4095     m_transformSource = source;
4096 }
4097 
4098 #endif
4099 
setDesignMode(InheritedBool value)4100 void Document::setDesignMode(InheritedBool value)
4101 {
4102     m_designMode = value;
4103 }
4104 
getDesignMode() const4105 Document::InheritedBool Document::getDesignMode() const
4106 {
4107     return m_designMode;
4108 }
4109 
inDesignMode() const4110 bool Document::inDesignMode() const
4111 {
4112     for (const Document* d = this; d; d = d->parentDocument()) {
4113         if (d->m_designMode != inherit)
4114             return d->m_designMode;
4115     }
4116     return false;
4117 }
4118 
parentDocument() const4119 Document* Document::parentDocument() const
4120 {
4121     if (!m_frame)
4122         return 0;
4123     Frame* parent = m_frame->tree()->parent();
4124     if (!parent)
4125         return 0;
4126     return parent->document();
4127 }
4128 
topDocument() const4129 Document* Document::topDocument() const
4130 {
4131     Document* doc = const_cast<Document *>(this);
4132     Element* element;
4133     while ((element = doc->ownerElement()))
4134         doc = element->document();
4135 
4136     return doc;
4137 }
4138 
createAttribute(const String & name,ExceptionCode & ec)4139 PassRefPtr<Attr> Document::createAttribute(const String& name, ExceptionCode& ec)
4140 {
4141     return createAttributeNS(String(), name, ec, true);
4142 }
4143 
createAttributeNS(const String & namespaceURI,const String & qualifiedName,ExceptionCode & ec,bool shouldIgnoreNamespaceChecks)4144 PassRefPtr<Attr> Document::createAttributeNS(const String& namespaceURI, const String& qualifiedName, ExceptionCode& ec, bool shouldIgnoreNamespaceChecks)
4145 {
4146     String prefix, localName;
4147     if (!parseQualifiedName(qualifiedName, prefix, localName, ec))
4148         return 0;
4149 
4150     QualifiedName qName(prefix, localName, namespaceURI);
4151     if (!shouldIgnoreNamespaceChecks && hasPrefixNamespaceMismatch(qName)) {
4152         ec = NAMESPACE_ERR;
4153         return 0;
4154     }
4155 
4156     // Spec: DOM Level 2 Core: http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-DocCrAttrNS
4157     if (!shouldIgnoreNamespaceChecks && qName.localName() == xmlnsAtom && qName.namespaceURI() != XMLNSNames::xmlnsNamespaceURI) {
4158         ec = NAMESPACE_ERR;
4159         return 0;
4160     }
4161 
4162     // FIXME: Assume this is a mapped attribute, since createAttribute isn't namespace-aware.  There's no harm to XML
4163     // documents if we're wrong.
4164     return Attr::create(0, this, Attribute::createMapped(qName, StringImpl::empty()));
4165 }
4166 
4167 #if ENABLE(SVG)
svgExtensions()4168 const SVGDocumentExtensions* Document::svgExtensions()
4169 {
4170     return m_svgExtensions.get();
4171 }
4172 
accessSVGExtensions()4173 SVGDocumentExtensions* Document::accessSVGExtensions()
4174 {
4175     if (!m_svgExtensions)
4176         m_svgExtensions = adoptPtr(new SVGDocumentExtensions(this));
4177     return m_svgExtensions.get();
4178 }
4179 
hasSVGRootNode() const4180 bool Document::hasSVGRootNode() const
4181 {
4182     return documentElement() && documentElement()->hasTagName(SVGNames::svgTag);
4183 }
4184 #endif
4185 
images()4186 PassRefPtr<HTMLCollection> Document::images()
4187 {
4188     return HTMLCollection::create(this, DocImages);
4189 }
4190 
applets()4191 PassRefPtr<HTMLCollection> Document::applets()
4192 {
4193     return HTMLCollection::create(this, DocApplets);
4194 }
4195 
embeds()4196 PassRefPtr<HTMLCollection> Document::embeds()
4197 {
4198     return HTMLCollection::create(this, DocEmbeds);
4199 }
4200 
plugins()4201 PassRefPtr<HTMLCollection> Document::plugins()
4202 {
4203     // This is an alias for embeds() required for the JS DOM bindings.
4204     return HTMLCollection::create(this, DocEmbeds);
4205 }
4206 
objects()4207 PassRefPtr<HTMLCollection> Document::objects()
4208 {
4209     return HTMLCollection::create(this, DocObjects);
4210 }
4211 
scripts()4212 PassRefPtr<HTMLCollection> Document::scripts()
4213 {
4214     return HTMLCollection::create(this, DocScripts);
4215 }
4216 
links()4217 PassRefPtr<HTMLCollection> Document::links()
4218 {
4219     return HTMLCollection::create(this, DocLinks);
4220 }
4221 
forms()4222 PassRefPtr<HTMLCollection> Document::forms()
4223 {
4224     return HTMLCollection::create(this, DocForms);
4225 }
4226 
anchors()4227 PassRefPtr<HTMLCollection> Document::anchors()
4228 {
4229     return HTMLCollection::create(this, DocAnchors);
4230 }
4231 
all()4232 PassRefPtr<HTMLAllCollection> Document::all()
4233 {
4234     return HTMLAllCollection::create(this);
4235 }
4236 
windowNamedItems(const String & name)4237 PassRefPtr<HTMLCollection> Document::windowNamedItems(const String &name)
4238 {
4239     return HTMLNameCollection::create(this, WindowNamedItems, name);
4240 }
4241 
documentNamedItems(const String & name)4242 PassRefPtr<HTMLCollection> Document::documentNamedItems(const String &name)
4243 {
4244     return HTMLNameCollection::create(this, DocumentNamedItems, name);
4245 }
4246 
nameCollectionInfo(CollectionType type,const AtomicString & name)4247 CollectionCache* Document::nameCollectionInfo(CollectionType type, const AtomicString& name)
4248 {
4249     ASSERT(type >= FirstNamedDocumentCachedType);
4250     unsigned index = type - FirstNamedDocumentCachedType;
4251     ASSERT(index < NumNamedDocumentCachedTypes);
4252 
4253     NamedCollectionMap& map = m_nameCollectionInfo[index];
4254     NamedCollectionMap::iterator iter = map.find(name.impl());
4255     if (iter == map.end())
4256         iter = map.add(name.impl(), new CollectionCache).first;
4257     iter->second->checkConsistency();
4258     return iter->second;
4259 }
4260 
finishedParsing()4261 void Document::finishedParsing()
4262 {
4263     ASSERT(!scriptableDocumentParser() || !m_parser->isParsing());
4264     ASSERT(!scriptableDocumentParser() || m_readyState != Loading);
4265     setParsing(false);
4266     if (!m_documentTiming.domContentLoadedEventStart)
4267         m_documentTiming.domContentLoadedEventStart = currentTime();
4268     dispatchEvent(Event::create(eventNames().DOMContentLoadedEvent, true, false));
4269     if (!m_documentTiming.domContentLoadedEventEnd)
4270         m_documentTiming.domContentLoadedEventEnd = currentTime();
4271 
4272     if (RefPtr<Frame> f = frame()) {
4273         // FrameLoader::finishedParsing() might end up calling Document::implicitClose() if all
4274         // resource loads are complete. HTMLObjectElements can start loading their resources from
4275         // post attach callbacks triggered by recalcStyle().  This means if we parse out an <object>
4276         // tag and then reach the end of the document without updating styles, we might not have yet
4277         // started the resource load and might fire the window load event too early.  To avoid this
4278         // we force the styles to be up to date before calling FrameLoader::finishedParsing().
4279         // See https://bugs.webkit.org/show_bug.cgi?id=36864 starting around comment 35.
4280         updateStyleIfNeeded();
4281 
4282         f->loader()->finishedParsing();
4283 
4284         InspectorInstrumentation::domContentLoadedEventFired(f.get(), url());
4285     }
4286 }
4287 
formElementsState() const4288 Vector<String> Document::formElementsState() const
4289 {
4290     Vector<String> stateVector;
4291     stateVector.reserveInitialCapacity(m_formElementsWithState.size() * 3);
4292     typedef FormElementListHashSet::const_iterator Iterator;
4293     Iterator end = m_formElementsWithState.end();
4294     for (Iterator it = m_formElementsWithState.begin(); it != end; ++it) {
4295         Element* elementWithState = *it;
4296         String value;
4297         if (!elementWithState->shouldSaveAndRestoreFormControlState())
4298             continue;
4299         if (!elementWithState->saveFormControlState(value))
4300             continue;
4301         stateVector.append(elementWithState->formControlName().string());
4302         stateVector.append(elementWithState->formControlType().string());
4303         stateVector.append(value);
4304     }
4305     return stateVector;
4306 }
4307 
4308 #if ENABLE(XPATH)
4309 
createExpression(const String & expression,XPathNSResolver * resolver,ExceptionCode & ec)4310 PassRefPtr<XPathExpression> Document::createExpression(const String& expression,
4311                                                        XPathNSResolver* resolver,
4312                                                        ExceptionCode& ec)
4313 {
4314     if (!m_xpathEvaluator)
4315         m_xpathEvaluator = XPathEvaluator::create();
4316     return m_xpathEvaluator->createExpression(expression, resolver, ec);
4317 }
4318 
createNSResolver(Node * nodeResolver)4319 PassRefPtr<XPathNSResolver> Document::createNSResolver(Node* nodeResolver)
4320 {
4321     if (!m_xpathEvaluator)
4322         m_xpathEvaluator = XPathEvaluator::create();
4323     return m_xpathEvaluator->createNSResolver(nodeResolver);
4324 }
4325 
evaluate(const String & expression,Node * contextNode,XPathNSResolver * resolver,unsigned short type,XPathResult * result,ExceptionCode & ec)4326 PassRefPtr<XPathResult> Document::evaluate(const String& expression,
4327                                            Node* contextNode,
4328                                            XPathNSResolver* resolver,
4329                                            unsigned short type,
4330                                            XPathResult* result,
4331                                            ExceptionCode& ec)
4332 {
4333     if (!m_xpathEvaluator)
4334         m_xpathEvaluator = XPathEvaluator::create();
4335     return m_xpathEvaluator->evaluate(expression, contextNode, resolver, type, result, ec);
4336 }
4337 
4338 #endif // ENABLE(XPATH)
4339 
setStateForNewFormElements(const Vector<String> & stateVector)4340 void Document::setStateForNewFormElements(const Vector<String>& stateVector)
4341 {
4342     // Walk the state vector backwards so that the value to use for each
4343     // name/type pair first is the one at the end of each individual vector
4344     // in the FormElementStateMap. We're using them like stacks.
4345     typedef FormElementStateMap::iterator Iterator;
4346     m_formElementsWithState.clear();
4347     for (size_t i = stateVector.size() / 3 * 3; i; i -= 3) {
4348         AtomicString a = stateVector[i - 3];
4349         AtomicString b = stateVector[i - 2];
4350         const String& c = stateVector[i - 1];
4351         FormElementKey key(a.impl(), b.impl());
4352         Iterator it = m_stateForNewFormElements.find(key);
4353         if (it != m_stateForNewFormElements.end())
4354             it->second.append(c);
4355         else {
4356             Vector<String> v(1);
4357             v[0] = c;
4358             m_stateForNewFormElements.set(key, v);
4359         }
4360     }
4361 }
4362 
hasStateForNewFormElements() const4363 bool Document::hasStateForNewFormElements() const
4364 {
4365     return !m_stateForNewFormElements.isEmpty();
4366 }
4367 
takeStateForFormElement(AtomicStringImpl * name,AtomicStringImpl * type,String & state)4368 bool Document::takeStateForFormElement(AtomicStringImpl* name, AtomicStringImpl* type, String& state)
4369 {
4370     typedef FormElementStateMap::iterator Iterator;
4371     Iterator it = m_stateForNewFormElements.find(FormElementKey(name, type));
4372     if (it == m_stateForNewFormElements.end())
4373         return false;
4374     ASSERT(it->second.size());
4375     state = it->second.last();
4376     if (it->second.size() > 1)
4377         it->second.removeLast();
4378     else
4379         m_stateForNewFormElements.remove(it);
4380     return true;
4381 }
4382 
FormElementKey(AtomicStringImpl * name,AtomicStringImpl * type)4383 FormElementKey::FormElementKey(AtomicStringImpl* name, AtomicStringImpl* type)
4384     : m_name(name), m_type(type)
4385 {
4386     ref();
4387 }
4388 
~FormElementKey()4389 FormElementKey::~FormElementKey()
4390 {
4391     deref();
4392 }
4393 
FormElementKey(const FormElementKey & other)4394 FormElementKey::FormElementKey(const FormElementKey& other)
4395     : m_name(other.name()), m_type(other.type())
4396 {
4397     ref();
4398 }
4399 
operator =(const FormElementKey & other)4400 FormElementKey& FormElementKey::operator=(const FormElementKey& other)
4401 {
4402     other.ref();
4403     deref();
4404     m_name = other.name();
4405     m_type = other.type();
4406     return *this;
4407 }
4408 
ref() const4409 void FormElementKey::ref() const
4410 {
4411     if (name())
4412         name()->ref();
4413     if (type())
4414         type()->ref();
4415 }
4416 
deref() const4417 void FormElementKey::deref() const
4418 {
4419     if (name())
4420         name()->deref();
4421     if (type())
4422         type()->deref();
4423 }
4424 
hash(const FormElementKey & key)4425 unsigned FormElementKeyHash::hash(const FormElementKey& key)
4426 {
4427     return StringHasher::hashMemory<sizeof(FormElementKey)>(&key);
4428 }
4429 
setIconURL(const String & iconURL,const String & type)4430 void Document::setIconURL(const String& iconURL, const String& type)
4431 {
4432     // FIXME - <rdar://problem/4727645> - At some point in the future, we might actually honor the "type"
4433     if (m_iconURL.isEmpty())
4434         m_iconURL = iconURL;
4435     else if (!type.isEmpty())
4436         m_iconURL = iconURL;
4437     if (Frame* f = frame())
4438         f->loader()->setIconURL(m_iconURL);
4439 }
4440 
registerFormElementWithFormAttribute(FormAssociatedElement * element)4441 void Document::registerFormElementWithFormAttribute(FormAssociatedElement* element)
4442 {
4443     ASSERT(toHTMLElement(element)->fastHasAttribute(formAttr));
4444     m_formElementsWithFormAttribute.add(element);
4445 }
4446 
unregisterFormElementWithFormAttribute(FormAssociatedElement * element)4447 void Document::unregisterFormElementWithFormAttribute(FormAssociatedElement* element)
4448 {
4449     m_formElementsWithFormAttribute.remove(element);
4450 }
4451 
resetFormElementsOwner(HTMLFormElement * form)4452 void Document::resetFormElementsOwner(HTMLFormElement* form)
4453 {
4454     typedef FormAssociatedElementListHashSet::iterator Iterator;
4455     Iterator end = m_formElementsWithFormAttribute.end();
4456     for (Iterator it = m_formElementsWithFormAttribute.begin(); it != end; ++it)
4457         (*it)->resetFormOwner(form);
4458 }
4459 
setUseSecureKeyboardEntryWhenActive(bool usesSecureKeyboard)4460 void Document::setUseSecureKeyboardEntryWhenActive(bool usesSecureKeyboard)
4461 {
4462     if (m_useSecureKeyboardEntryWhenActive == usesSecureKeyboard)
4463         return;
4464 
4465     m_useSecureKeyboardEntryWhenActive = usesSecureKeyboard;
4466     m_frame->selection()->updateSecureKeyboardEntryIfActive();
4467 }
4468 
useSecureKeyboardEntryWhenActive() const4469 bool Document::useSecureKeyboardEntryWhenActive() const
4470 {
4471     return m_useSecureKeyboardEntryWhenActive;
4472 }
4473 
initSecurityContext()4474 void Document::initSecurityContext()
4475 {
4476     if (securityOrigin() && !securityOrigin()->isEmpty())
4477         return; // m_securityOrigin has already been initialized.
4478 
4479     if (!m_frame) {
4480         // No source for a security context.
4481         // This can occur via document.implementation.createDocument().
4482         m_cookieURL = KURL(ParsedURLString, "");
4483         ScriptExecutionContext::setSecurityOrigin(SecurityOrigin::createEmpty());
4484         m_contentSecurityPolicy = ContentSecurityPolicy::create();
4485         return;
4486     }
4487 
4488     // In the common case, create the security context from the currently
4489     // loading URL with a fresh content security policy.
4490     m_cookieURL = m_url;
4491     ScriptExecutionContext::setSecurityOrigin(SecurityOrigin::create(m_url, m_frame->loader()->sandboxFlags()));
4492     m_contentSecurityPolicy = ContentSecurityPolicy::create(securityOrigin());
4493 
4494     if (SecurityOrigin::allowSubstituteDataAccessToLocal()) {
4495         // If this document was loaded with substituteData, then the document can
4496         // load local resources.  See https://bugs.webkit.org/show_bug.cgi?id=16756
4497         // and https://bugs.webkit.org/show_bug.cgi?id=19760 for further
4498         // discussion.
4499 
4500         DocumentLoader* documentLoader = loader();
4501         if (documentLoader && documentLoader->substituteData().isValid())
4502             securityOrigin()->grantLoadLocalResources();
4503     }
4504 
4505     if (Settings* settings = this->settings()) {
4506         if (!settings->isWebSecurityEnabled()) {
4507           // Web security is turned off.  We should let this document access every
4508           // other document.  This is used primary by testing harnesses for web
4509           // sites.
4510           securityOrigin()->grantUniversalAccess();
4511 
4512         } else if (settings->allowUniversalAccessFromFileURLs() && securityOrigin()->isLocal()) {
4513           // Some clients want file:// URLs to have universal access, but that
4514           // setting is dangerous for other clients.
4515           securityOrigin()->grantUniversalAccess();
4516         } else if (!settings->allowFileAccessFromFileURLs() && securityOrigin()->isLocal()) {
4517           // Some clients want file:// URLs to have even tighter restrictions by
4518           // default, and not be able to access other local files.
4519           securityOrigin()->enforceFilePathSeparation();
4520         }
4521     }
4522 
4523     if (!securityOrigin()->isEmpty())
4524         return;
4525 
4526     // If we do not obtain a meaningful origin from the URL, then we try to
4527     // find one via the frame hierarchy.
4528 
4529     Frame* ownerFrame = m_frame->tree()->parent();
4530     if (!ownerFrame)
4531         ownerFrame = m_frame->loader()->opener();
4532 
4533     if (ownerFrame) {
4534         m_cookieURL = ownerFrame->document()->cookieURL();
4535         // We alias the SecurityOrigins to match Firefox, see Bug 15313
4536         // https://bugs.webkit.org/show_bug.cgi?id=15313
4537         ScriptExecutionContext::setSecurityOrigin(ownerFrame->document()->securityOrigin());
4538         // FIXME: Consider moving m_contentSecurityPolicy into SecurityOrigin.
4539         m_contentSecurityPolicy = ownerFrame->document()->contentSecurityPolicy();
4540     }
4541 }
4542 
setSecurityOrigin(SecurityOrigin * securityOrigin)4543 void Document::setSecurityOrigin(SecurityOrigin* securityOrigin)
4544 {
4545     ScriptExecutionContext::setSecurityOrigin(securityOrigin);
4546     // FIXME: Find a better place to enable DNS prefetch, which is a loader concept,
4547     // not applicable to arbitrary documents.
4548     initDNSPrefetch();
4549 }
4550 
4551 #if ENABLE(DATABASE)
4552 
allowDatabaseAccess() const4553 bool Document::allowDatabaseAccess() const
4554 {
4555     if (!page() || page()->settings()->privateBrowsingEnabled())
4556         return false;
4557     return true;
4558 }
4559 
databaseExceededQuota(const String & name)4560 void Document::databaseExceededQuota(const String& name)
4561 {
4562     Page* currentPage = page();
4563     if (currentPage)
4564         currentPage->chrome()->client()->exceededDatabaseQuota(document()->frame(), name);
4565 }
4566 
4567 #endif
4568 
isContextThread() const4569 bool Document::isContextThread() const
4570 {
4571     return isMainThread();
4572 }
4573 
updateURLForPushOrReplaceState(const KURL & url)4574 void Document::updateURLForPushOrReplaceState(const KURL& url)
4575 {
4576     Frame* f = frame();
4577     if (!f)
4578         return;
4579 
4580     setURL(url);
4581     f->loader()->setOutgoingReferrer(url);
4582 
4583     if (DocumentLoader* documentLoader = loader())
4584         documentLoader->replaceRequestURLForSameDocumentNavigation(url);
4585 }
4586 
statePopped(SerializedScriptValue * stateObject)4587 void Document::statePopped(SerializedScriptValue* stateObject)
4588 {
4589     if (!frame())
4590         return;
4591 
4592     // Per step 11 of section 6.5.9 (history traversal) of the HTML5 spec, we
4593     // defer firing of popstate until we're in the complete state.
4594     if (m_readyState == Complete)
4595         enqueuePopstateEvent(stateObject);
4596     else
4597         m_pendingStateObject = stateObject;
4598 }
4599 
updateFocusAppearanceSoon(bool restorePreviousSelection)4600 void Document::updateFocusAppearanceSoon(bool restorePreviousSelection)
4601 {
4602     m_updateFocusAppearanceRestoresSelection = restorePreviousSelection;
4603     if (!m_updateFocusAppearanceTimer.isActive())
4604         m_updateFocusAppearanceTimer.startOneShot(0);
4605 }
4606 
cancelFocusAppearanceUpdate()4607 void Document::cancelFocusAppearanceUpdate()
4608 {
4609     m_updateFocusAppearanceTimer.stop();
4610 }
4611 
updateFocusAppearanceTimerFired(Timer<Document> *)4612 void Document::updateFocusAppearanceTimerFired(Timer<Document>*)
4613 {
4614     Node* node = focusedNode();
4615     if (!node)
4616         return;
4617     if (!node->isElementNode())
4618         return;
4619 
4620     updateLayout();
4621 
4622     Element* element = static_cast<Element*>(node);
4623     if (element->isFocusable())
4624         element->updateFocusAppearance(m_updateFocusAppearanceRestoresSelection);
4625 }
4626 
4627 // FF method for accessing the selection added for compatibility.
getSelection() const4628 DOMSelection* Document::getSelection() const
4629 {
4630     return frame() ? frame()->domWindow()->getSelection() : 0;
4631 }
4632 
4633 #if ENABLE(WML)
resetWMLPageState()4634 void Document::resetWMLPageState()
4635 {
4636     if (WMLPageState* pageState = wmlPageStateForDocument(this))
4637         pageState->reset();
4638 }
4639 
initializeWMLPageState()4640 void Document::initializeWMLPageState()
4641 {
4642     if (!isWMLDocument())
4643         return;
4644 
4645     static_cast<WMLDocument*>(this)->initialize();
4646 }
4647 #endif
4648 
attachRange(Range * range)4649 void Document::attachRange(Range* range)
4650 {
4651     ASSERT(!m_ranges.contains(range));
4652     m_ranges.add(range);
4653 }
4654 
detachRange(Range * range)4655 void Document::detachRange(Range* range)
4656 {
4657     // We don't ASSERT m_ranges.contains(range) to allow us to call this
4658     // unconditionally to fix: https://bugs.webkit.org/show_bug.cgi?id=26044
4659     m_ranges.remove(range);
4660 }
4661 
getCSSCanvasContext(const String & type,const String & name,int width,int height)4662 CanvasRenderingContext* Document::getCSSCanvasContext(const String& type, const String& name, int width, int height)
4663 {
4664     HTMLCanvasElement* result = getCSSCanvasElement(name);
4665     if (!result)
4666         return 0;
4667     result->setSize(IntSize(width, height));
4668     return result->getContext(type);
4669 }
4670 
getCSSCanvasElement(const String & name)4671 HTMLCanvasElement* Document::getCSSCanvasElement(const String& name)
4672 {
4673     RefPtr<HTMLCanvasElement> result = m_cssCanvasElements.get(name).get();
4674     if (!result) {
4675         result = HTMLCanvasElement::create(this);
4676         m_cssCanvasElements.set(name, result);
4677     }
4678     return result.get();
4679 }
4680 
initDNSPrefetch()4681 void Document::initDNSPrefetch()
4682 {
4683     Settings* settings = this->settings();
4684 
4685     m_haveExplicitlyDisabledDNSPrefetch = false;
4686     m_isDNSPrefetchEnabled = settings && settings->dnsPrefetchingEnabled() && securityOrigin()->protocol() == "http";
4687 
4688     // Inherit DNS prefetch opt-out from parent frame
4689     if (Document* parent = parentDocument()) {
4690         if (!parent->isDNSPrefetchEnabled())
4691             m_isDNSPrefetchEnabled = false;
4692     }
4693 }
4694 
parseDNSPrefetchControlHeader(const String & dnsPrefetchControl)4695 void Document::parseDNSPrefetchControlHeader(const String& dnsPrefetchControl)
4696 {
4697     if (equalIgnoringCase(dnsPrefetchControl, "on") && !m_haveExplicitlyDisabledDNSPrefetch) {
4698         m_isDNSPrefetchEnabled = true;
4699         return;
4700     }
4701 
4702     m_isDNSPrefetchEnabled = false;
4703     m_haveExplicitlyDisabledDNSPrefetch = true;
4704 }
4705 
addMessage(MessageSource source,MessageType type,MessageLevel level,const String & message,unsigned lineNumber,const String & sourceURL,PassRefPtr<ScriptCallStack> callStack)4706 void Document::addMessage(MessageSource source, MessageType type, MessageLevel level, const String& message, unsigned lineNumber, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack)
4707 {
4708     if (DOMWindow* window = domWindow())
4709         window->console()->addMessage(source, type, level, message, lineNumber, sourceURL, callStack);
4710 }
4711 
4712 struct PerformTaskContext {
4713     WTF_MAKE_NONCOPYABLE(PerformTaskContext); WTF_MAKE_FAST_ALLOCATED;
4714 public:
PerformTaskContextWebCore::PerformTaskContext4715     PerformTaskContext(PassRefPtr<DocumentWeakReference> documentReference, PassOwnPtr<ScriptExecutionContext::Task> task)
4716         : documentReference(documentReference)
4717         , task(task)
4718     {
4719     }
4720 
4721     RefPtr<DocumentWeakReference> documentReference;
4722     OwnPtr<ScriptExecutionContext::Task> task;
4723 };
4724 
performTask(void * ctx)4725 static void performTask(void* ctx)
4726 {
4727     ASSERT(isMainThread());
4728 
4729     PerformTaskContext* context = reinterpret_cast<PerformTaskContext*>(ctx);
4730     ASSERT(context);
4731 
4732     if (Document* document = context->documentReference->document())
4733         context->task->performTask(document);
4734 
4735     delete context;
4736 }
4737 
postTask(PassOwnPtr<Task> task)4738 void Document::postTask(PassOwnPtr<Task> task)
4739 {
4740     callOnMainThread(performTask, new PerformTaskContext(m_weakReference, task));
4741 }
4742 
suspendScriptedAnimationControllerCallbacks()4743 void Document::suspendScriptedAnimationControllerCallbacks()
4744 {
4745 #if ENABLE(REQUEST_ANIMATION_FRAME)
4746     if (m_scriptedAnimationController)
4747         m_scriptedAnimationController->suspend();
4748 #endif
4749 }
4750 
resumeScriptedAnimationControllerCallbacks()4751 void Document::resumeScriptedAnimationControllerCallbacks()
4752 {
4753 #if ENABLE(REQUEST_ANIMATION_FRAME)
4754     if (m_scriptedAnimationController)
4755         m_scriptedAnimationController->resume();
4756 #endif
4757 }
4758 
displayStringModifiedByEncoding(const String & str) const4759 String Document::displayStringModifiedByEncoding(const String& str) const
4760 {
4761     if (m_decoder)
4762         return m_decoder->encoding().displayString(str.impl());
4763     return str;
4764 }
4765 
displayStringModifiedByEncoding(PassRefPtr<StringImpl> str) const4766 PassRefPtr<StringImpl> Document::displayStringModifiedByEncoding(PassRefPtr<StringImpl> str) const
4767 {
4768     if (m_decoder)
4769         return m_decoder->encoding().displayString(str);
4770     return str;
4771 }
4772 
displayBufferModifiedByEncoding(UChar * buffer,unsigned len) const4773 void Document::displayBufferModifiedByEncoding(UChar* buffer, unsigned len) const
4774 {
4775     if (m_decoder)
4776         m_decoder->encoding().displayBuffer(buffer, len);
4777 }
4778 
enqueuePageshowEvent(PageshowEventPersistence persisted)4779 void Document::enqueuePageshowEvent(PageshowEventPersistence persisted)
4780 {
4781     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=36334 Pageshow event needs to fire asynchronously.
4782     dispatchWindowEvent(PageTransitionEvent::create(eventNames().pageshowEvent, persisted), this);
4783 }
4784 
enqueueHashchangeEvent(const String & oldURL,const String & newURL)4785 void Document::enqueueHashchangeEvent(const String& oldURL, const String& newURL)
4786 {
4787     enqueueWindowEvent(HashChangeEvent::create(oldURL, newURL));
4788 }
4789 
enqueuePopstateEvent(PassRefPtr<SerializedScriptValue> stateObject)4790 void Document::enqueuePopstateEvent(PassRefPtr<SerializedScriptValue> stateObject)
4791 {
4792     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=36202 Popstate event needs to fire asynchronously
4793     dispatchWindowEvent(PopStateEvent::create(stateObject));
4794 }
4795 
addMediaCanStartListener(MediaCanStartListener * listener)4796 void Document::addMediaCanStartListener(MediaCanStartListener* listener)
4797 {
4798     ASSERT(!m_mediaCanStartListeners.contains(listener));
4799     m_mediaCanStartListeners.add(listener);
4800 }
4801 
removeMediaCanStartListener(MediaCanStartListener * listener)4802 void Document::removeMediaCanStartListener(MediaCanStartListener* listener)
4803 {
4804     ASSERT(m_mediaCanStartListeners.contains(listener));
4805     m_mediaCanStartListeners.remove(listener);
4806 }
4807 
takeAnyMediaCanStartListener()4808 MediaCanStartListener* Document::takeAnyMediaCanStartListener()
4809 {
4810     HashSet<MediaCanStartListener*>::iterator slot = m_mediaCanStartListeners.begin();
4811     if (slot == m_mediaCanStartListeners.end())
4812         return 0;
4813     MediaCanStartListener* listener = *slot;
4814     m_mediaCanStartListeners.remove(slot);
4815     return listener;
4816 }
4817 
4818 #if ENABLE(XHTMLMP)
isXHTMLMPDocument() const4819 bool Document::isXHTMLMPDocument() const
4820 {
4821     if (!frame() || !frame()->loader())
4822         return false;
4823     // As per section 7.2 of OMA-WAP-XHTMLMP-V1_1-20061020-A.pdf, a conforming user agent
4824     // MUST accept XHTMLMP document identified as "application/vnd.wap.xhtml+xml"
4825     // and SHOULD accept it identified as "application/xhtml+xml" , "application/xhtml+xml" is a
4826     // general MIME type for all XHTML documents, not only for XHTMLMP
4827     return loader()->writer()->mimeType() == "application/vnd.wap.xhtml+xml";
4828 }
4829 #endif
4830 
4831 #if ENABLE(FULLSCREEN_API)
fullScreenIsAllowedForElement(Element * element) const4832 bool Document::fullScreenIsAllowedForElement(Element* element) const
4833 {
4834     ASSERT(element);
4835     while (HTMLFrameOwnerElement* ownerElement = element->document()->ownerElement()) {
4836         if (!ownerElement->hasTagName(frameTag) && !ownerElement->hasTagName(iframeTag))
4837             continue;
4838 
4839         if (!static_cast<HTMLFrameElementBase*>(ownerElement)->allowFullScreen())
4840             return false;
4841         element = ownerElement;
4842     }
4843     return true;
4844 }
4845 
webkitRequestFullScreenForElement(Element * element,unsigned short flags)4846 void Document::webkitRequestFullScreenForElement(Element* element, unsigned short flags)
4847 {
4848     if (!page() || !page()->settings()->fullScreenEnabled())
4849         return;
4850 
4851     if (!element)
4852         element = documentElement();
4853 
4854     if (!fullScreenIsAllowedForElement(element))
4855         return;
4856 
4857     if (!ScriptController::processingUserGesture())
4858         return;
4859 
4860     if (!page()->chrome()->client()->supportsFullScreenForElement(element, flags & Element::ALLOW_KEYBOARD_INPUT))
4861         return;
4862 
4863     m_areKeysEnabledInFullScreen = flags & Element::ALLOW_KEYBOARD_INPUT;
4864     page()->chrome()->client()->enterFullScreenForElement(element);
4865 }
4866 
webkitCancelFullScreen()4867 void Document::webkitCancelFullScreen()
4868 {
4869     if (!page() || !m_fullScreenElement)
4870         return;
4871 
4872     page()->chrome()->client()->exitFullScreenForElement(m_fullScreenElement.get());
4873 #if PLATFORM(ANDROID)
4874     // The next time we try to enter full screen, we need this change to know
4875     // we are not in full screen any more.
4876     m_fullScreenElement = 0;
4877 #endif
4878 }
4879 
webkitWillEnterFullScreenForElement(Element * element)4880 void Document::webkitWillEnterFullScreenForElement(Element* element)
4881 {
4882     ASSERT(element);
4883     ASSERT(page() && page()->settings()->fullScreenEnabled());
4884 
4885     m_fullScreenElement = element;
4886 
4887 #if PLATFORM(ANDROID)
4888     // Our approach on Poster handling is android specific: we are passing the
4889     // poster from java side to native and we can't keep the content if the
4890     // video element is detached and its RenderLayer object is deleted.
4891     if(!(m_fullScreenElement->hasTagName(HTMLNames::videoTag))) {
4892 #endif
4893     if (m_fullScreenElement != documentElement())
4894         m_fullScreenElement->detach();
4895 
4896     recalcStyle(Force);
4897 #if PLATFORM(ANDROID)
4898     }
4899 #endif
4900 
4901     if (m_fullScreenRenderer) {
4902         m_fullScreenRenderer->setAnimating(true);
4903 #if USE(ACCELERATED_COMPOSITING)
4904         view()->updateCompositingLayers();
4905         if (m_fullScreenRenderer->layer()->isComposited())
4906             page()->chrome()->client()->setRootFullScreenLayer(m_fullScreenRenderer->layer()->backing()->graphicsLayer());
4907 #endif
4908     }
4909 }
4910 
webkitDidEnterFullScreenForElement(Element *)4911 void Document::webkitDidEnterFullScreenForElement(Element*)
4912 {
4913     if (m_fullScreenRenderer) {
4914         m_fullScreenRenderer->setAnimating(false);
4915 #if USE(ACCELERATED_COMPOSITING)
4916         view()->updateCompositingLayers();
4917         page()->chrome()->client()->setRootFullScreenLayer(0);
4918 #endif
4919     }
4920     m_fullScreenChangeDelayTimer.startOneShot(0);
4921 }
4922 
webkitWillExitFullScreenForElement(Element *)4923 void Document::webkitWillExitFullScreenForElement(Element*)
4924 {
4925     if (m_fullScreenRenderer) {
4926         m_fullScreenRenderer->setAnimating(true);
4927 #if USE(ACCELERATED_COMPOSITING)
4928         view()->updateCompositingLayers();
4929         if (m_fullScreenRenderer->layer()->isComposited())
4930             page()->chrome()->client()->setRootFullScreenLayer(m_fullScreenRenderer->layer()->backing()->graphicsLayer());
4931 #endif
4932     }
4933 }
4934 
webkitDidExitFullScreenForElement(Element *)4935 void Document::webkitDidExitFullScreenForElement(Element*)
4936 {
4937     m_areKeysEnabledInFullScreen = false;
4938 
4939     if (m_fullScreenRenderer)
4940         m_fullScreenRenderer->remove();
4941 
4942     if (m_fullScreenElement != documentElement())
4943         m_fullScreenElement->detach();
4944 
4945     m_fullScreenElement = 0;
4946     setFullScreenRenderer(0);
4947 #if USE(ACCELERATED_COMPOSITING)
4948     page()->chrome()->client()->setRootFullScreenLayer(0);
4949 #endif
4950     recalcStyle(Force);
4951 
4952     m_fullScreenChangeDelayTimer.startOneShot(0);
4953 }
4954 
setFullScreenRenderer(RenderFullScreen * renderer)4955 void Document::setFullScreenRenderer(RenderFullScreen* renderer)
4956 {
4957     if (renderer == m_fullScreenRenderer)
4958         return;
4959 
4960     if (m_fullScreenRenderer)
4961         m_fullScreenRenderer->destroy();
4962     m_fullScreenRenderer = renderer;
4963 
4964     // This notification can come in after the page has been destroyed.
4965     if (page())
4966         page()->chrome()->client()->fullScreenRendererChanged(m_fullScreenRenderer);
4967 }
4968 
setFullScreenRendererSize(const IntSize & size)4969 void Document::setFullScreenRendererSize(const IntSize& size)
4970 {
4971     ASSERT(m_fullScreenRenderer);
4972     if (!m_fullScreenRenderer)
4973         return;
4974 
4975     if (m_fullScreenRenderer) {
4976         RefPtr<RenderStyle> newStyle = RenderStyle::clone(m_fullScreenRenderer->style());
4977         newStyle->setWidth(Length(size.width(), WebCore::Fixed));
4978         newStyle->setHeight(Length(size.height(), WebCore::Fixed));
4979         newStyle->setTop(Length(0, WebCore::Fixed));
4980         newStyle->setLeft(Length(0, WebCore::Fixed));
4981         m_fullScreenRenderer->setStyle(newStyle);
4982         updateLayout();
4983     }
4984 }
4985 
setFullScreenRendererBackgroundColor(Color backgroundColor)4986 void Document::setFullScreenRendererBackgroundColor(Color backgroundColor)
4987 {
4988     if (!m_fullScreenRenderer)
4989         return;
4990 
4991     RefPtr<RenderStyle> newStyle = RenderStyle::clone(m_fullScreenRenderer->style());
4992     newStyle->setBackgroundColor(backgroundColor);
4993     m_fullScreenRenderer->setStyle(newStyle);
4994 }
4995 
fullScreenChangeDelayTimerFired(Timer<Document> *)4996 void Document::fullScreenChangeDelayTimerFired(Timer<Document>*)
4997 {
4998     Element* element = m_fullScreenElement.get();
4999     if (!element)
5000         element = documentElement();
5001 
5002     element->dispatchEvent(Event::create(eventNames().webkitfullscreenchangeEvent, true, false));
5003 }
5004 
5005 #endif
5006 
decrementLoadEventDelayCount()5007 void Document::decrementLoadEventDelayCount()
5008 {
5009     ASSERT(m_loadEventDelayCount);
5010     --m_loadEventDelayCount;
5011 
5012     if (frame() && !m_loadEventDelayCount && !m_loadEventDelayTimer.isActive())
5013         m_loadEventDelayTimer.startOneShot(0);
5014 }
5015 
loadEventDelayTimerFired(Timer<Document> *)5016 void Document::loadEventDelayTimerFired(Timer<Document>*)
5017 {
5018     if (frame())
5019         frame()->loader()->checkCompleted();
5020 }
5021 
5022 #if ENABLE(REQUEST_ANIMATION_FRAME)
webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback> callback,Element * animationElement)5023 int Document::webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback> callback, Element* animationElement)
5024 {
5025     if (!m_scriptedAnimationController)
5026         m_scriptedAnimationController = ScriptedAnimationController::create(this);
5027 
5028     return m_scriptedAnimationController->registerCallback(callback, animationElement);
5029 }
5030 
webkitCancelRequestAnimationFrame(int id)5031 void Document::webkitCancelRequestAnimationFrame(int id)
5032 {
5033     if (!m_scriptedAnimationController)
5034         return;
5035     m_scriptedAnimationController->cancelCallback(id);
5036 }
5037 
serviceScriptedAnimations(DOMTimeStamp time)5038 void Document::serviceScriptedAnimations(DOMTimeStamp time)
5039 {
5040     if (!m_scriptedAnimationController)
5041         return;
5042     m_scriptedAnimationController->serviceScriptedAnimations(time);
5043 }
5044 #endif
5045 
5046 #if ENABLE(TOUCH_EVENTS)
createTouch(DOMWindow * window,EventTarget * target,int identifier,int pageX,int pageY,int screenX,int screenY,ExceptionCode &) const5047 PassRefPtr<Touch> Document::createTouch(DOMWindow* window, EventTarget* target, int identifier, int pageX, int pageY, int screenX, int screenY, ExceptionCode&) const
5048 {
5049     // FIXME: It's not clear from the documentation at
5050     // http://developer.apple.com/library/safari/#documentation/UserExperience/Reference/DocumentAdditionsReference/DocumentAdditions/DocumentAdditions.html
5051     // when this method should throw and nor is it by inspection of iOS behavior. It would be nice to verify any cases where it throws under iOS
5052     // and implement them here. See https://bugs.webkit.org/show_bug.cgi?id=47819
5053     // Ditto for the createTouchList method below.
5054     Frame* frame = window ? window->frame() : this->frame();
5055     return Touch::create(frame, target, identifier, screenX, screenY, pageX, pageY);
5056 }
5057 
createTouchList(ExceptionCode &) const5058 PassRefPtr<TouchList> Document::createTouchList(ExceptionCode&) const
5059 {
5060     return TouchList::create();
5061 }
5062 #endif
5063 
loader() const5064 DocumentLoader* Document::loader() const
5065 {
5066     if (!m_frame)
5067         return 0;
5068 
5069     DocumentLoader* loader = m_frame->loader()->activeDocumentLoader();
5070     if (!loader)
5071         return 0;
5072 
5073 #if PLATFORM(ANDROID)
5074     // Temporary hack for http://b/5188895
5075     bool isDocumentUpToDate = m_frame->isDocumentUpToDate();
5076 #else
5077     bool isDocumentUpToDate = true;
5078 #endif
5079     if (isDocumentUpToDate && m_frame->document() != this)
5080         return 0;
5081 
5082     return loader;
5083 }
5084 
5085 } // namespace WebCore
5086