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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 #if ENABLE(TOUCH_EVENTS)
193 #if USE(V8)
194 #include "RuntimeEnabledFeatures.h"
195 #endif
196 #include "TouchEvent.h"
197 #endif
198 
199 #if ENABLE(WML)
200 #include "WMLDocument.h"
201 #include "WMLElement.h"
202 #include "WMLElementFactory.h"
203 #include "WMLNames.h"
204 #endif
205 
206 #if ENABLE(MATHML)
207 #include "MathMLElement.h"
208 #include "MathMLElementFactory.h"
209 #include "MathMLNames.h"
210 #endif
211 
212 #if ENABLE(XHTMLMP)
213 #include "HTMLNoScriptElement.h"
214 #endif
215 
216 #if ENABLE(FULLSCREEN_API)
217 #include "RenderFullScreen.h"
218 #endif
219 
220 #if ENABLE(REQUEST_ANIMATION_FRAME)
221 #include "RequestAnimationFrameCallback.h"
222 #include "ScriptedAnimationController.h"
223 #endif
224 
225 using namespace std;
226 using namespace WTF;
227 using namespace Unicode;
228 
229 namespace WebCore {
230 
231 using namespace HTMLNames;
232 
233 // #define INSTRUMENT_LAYOUT_SCHEDULING 1
234 
235 static const unsigned cMaxWriteRecursionDepth = 21;
236 
237 // This amount of time must have elapsed before we will even consider scheduling a layout without a delay.
238 // FIXME: For faster machines this value can really be lowered to 200.  250 is adequate, but a little high
239 // for dual G5s. :)
240 static const int cLayoutScheduleThreshold = 250;
241 
242 // DOM Level 2 says (letters added):
243 //
244 // a) Name start characters must have one of the categories Ll, Lu, Lo, Lt, Nl.
245 // b) Name characters other than Name-start characters must have one of the categories Mc, Me, Mn, Lm, or Nd.
246 // c) Characters in the compatibility area (i.e. with character code greater than #xF900 and less than #xFFFE) are not allowed in XML names.
247 // 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.
248 // 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.
249 // f) Characters #x20DD-#x20E0 are excluded (in accordance with Unicode, section 5.14).
250 // g) Character #x00B7 is classified as an extender, because the property list so identifies it.
251 // h) Character #x0387 is added as a name character, because #x00B7 is its canonical equivalent.
252 // i) Characters ':' and '_' are allowed as name-start characters.
253 // j) Characters '-' and '.' are allowed as name characters.
254 //
255 // It also contains complete tables. If we decide it's better, we could include those instead of the following code.
256 
isValidNameStart(UChar32 c)257 static inline bool isValidNameStart(UChar32 c)
258 {
259     // rule (e) above
260     if ((c >= 0x02BB && c <= 0x02C1) || c == 0x559 || c == 0x6E5 || c == 0x6E6)
261         return true;
262 
263     // rule (i) above
264     if (c == ':' || c == '_')
265         return true;
266 
267     // rules (a) and (f) above
268     const uint32_t nameStartMask = Letter_Lowercase | Letter_Uppercase | Letter_Other | Letter_Titlecase | Number_Letter;
269     if (!(Unicode::category(c) & nameStartMask))
270         return false;
271 
272     // rule (c) above
273     if (c >= 0xF900 && c < 0xFFFE)
274         return false;
275 
276     // rule (d) above
277     DecompositionType decompType = decompositionType(c);
278     if (decompType == DecompositionFont || decompType == DecompositionCompat)
279         return false;
280 
281     return true;
282 }
283 
isValidNamePart(UChar32 c)284 static inline bool isValidNamePart(UChar32 c)
285 {
286     // rules (a), (e), and (i) above
287     if (isValidNameStart(c))
288         return true;
289 
290     // rules (g) and (h) above
291     if (c == 0x00B7 || c == 0x0387)
292         return true;
293 
294     // rule (j) above
295     if (c == '-' || c == '.')
296         return true;
297 
298     // rules (b) and (f) above
299     const uint32_t otherNamePartMask = Mark_NonSpacing | Mark_Enclosing | Mark_SpacingCombining | Letter_Modifier | Number_DecimalDigit;
300     if (!(Unicode::category(c) & otherNamePartMask))
301         return false;
302 
303     // rule (c) above
304     if (c >= 0xF900 && c < 0xFFFE)
305         return false;
306 
307     // rule (d) above
308     DecompositionType decompType = decompositionType(c);
309     if (decompType == DecompositionFont || decompType == DecompositionCompat)
310         return false;
311 
312     return true;
313 }
314 
widgetForNode(Node * focusedNode)315 static Widget* widgetForNode(Node* focusedNode)
316 {
317     if (!focusedNode)
318         return 0;
319     RenderObject* renderer = focusedNode->renderer();
320     if (!renderer || !renderer->isWidget())
321         return 0;
322     return toRenderWidget(renderer)->widget();
323 }
324 
acceptsEditingFocus(Node * node)325 static bool acceptsEditingFocus(Node* node)
326 {
327     ASSERT(node);
328     ASSERT(node->rendererIsEditable());
329 
330     Node* root = node->rootEditableElement();
331     Frame* frame = node->document()->frame();
332     if (!frame || !root)
333         return false;
334 
335     return frame->editor()->shouldBeginEditing(rangeOfContents(root).get());
336 }
337 
disableRangeMutation(Page * page)338 static bool disableRangeMutation(Page* page)
339 {
340     // This check is made on super-hot code paths, so we only want this on Tiger and Leopard.
341 #if defined(TARGETING_TIGER) || defined(TARGETING_LEOPARD)
342     // Disable Range mutation on document modifications in Tiger and Leopard Mail
343     // See <rdar://problem/5865171>
344     return page && (page->settings()->needsLeopardMailQuirks() || page->settings()->needsTigerMailQuirks());
345 #else
346     UNUSED_PARAM(page);
347     return false;
348 #endif
349 }
350 
351 static HashSet<Document*>* documentsThatNeedStyleRecalc = 0;
352 
353 class DocumentWeakReference : public ThreadSafeRefCounted<DocumentWeakReference> {
354 public:
create(Document * document)355     static PassRefPtr<DocumentWeakReference> create(Document* document)
356     {
357         return adoptRef(new DocumentWeakReference(document));
358     }
359 
document()360     Document* document()
361     {
362         ASSERT(isMainThread());
363         return m_document;
364     }
365 
clear()366     void clear()
367     {
368         ASSERT(isMainThread());
369         m_document = 0;
370     }
371 
372 private:
DocumentWeakReference(Document * document)373     DocumentWeakReference(Document* document)
374         : m_document(document)
375     {
376         ASSERT(isMainThread());
377     }
378 
379     Document* m_document;
380 };
381 
382 uint64_t Document::s_globalTreeVersion = 0;
383 
Document(Frame * frame,const KURL & url,bool isXHTML,bool isHTML)384 Document::Document(Frame* frame, const KURL& url, bool isXHTML, bool isHTML)
385     : TreeScope(this)
386     , m_guardRefCount(0)
387     , m_compatibilityMode(NoQuirksMode)
388     , m_compatibilityModeLocked(false)
389     , m_domTreeVersion(++s_globalTreeVersion)
390 #ifdef ANDROID_STYLE_VERSION
391     , m_styleVersion(0)
392 #endif
393     , m_styleSheets(StyleSheetList::create(this))
394     , m_readyState(Complete)
395     , m_styleRecalcTimer(this, &Document::styleRecalcTimerFired)
396     , m_pendingStyleRecalcShouldForce(false)
397     , m_frameElementsShouldIgnoreScrolling(false)
398     , m_containsValidityStyleRules(false)
399     , m_updateFocusAppearanceRestoresSelection(false)
400     , m_ignoreDestructiveWriteCount(0)
401     , m_titleSetExplicitly(false)
402     , m_updateFocusAppearanceTimer(this, &Document::updateFocusAppearanceTimerFired)
403     , m_startTime(currentTime())
404     , m_overMinimumLayoutThreshold(false)
405     , m_extraLayoutDelay(0)
406     , m_scriptRunner(ScriptRunner::create(this))
407     , m_xmlVersion("1.0")
408     , m_xmlStandalone(false)
409     , m_savedRenderer(0)
410     , m_designMode(inherit)
411 #if ENABLE(SVG)
412     , m_svgExtensions(0)
413 #endif
414 #if ENABLE(DASHBOARD_SUPPORT)
415     , m_hasDashboardRegions(false)
416     , m_dashboardRegionsDirty(false)
417 #endif
418     , m_createRenderers(true)
419     , m_inPageCache(false)
420     , m_useSecureKeyboardEntryWhenActive(false)
421     , m_isXHTML(isXHTML)
422     , m_isHTML(isHTML)
423     , m_usesViewSourceStyles(false)
424     , m_sawElementsInKnownNamespaces(false)
425     , m_usingGeolocation(false)
426     , m_eventQueue(EventQueue::create(this))
427 #if ENABLE(WML)
428     , m_containsWMLContent(false)
429 #endif
430     , m_weakReference(DocumentWeakReference::create(this))
431     , m_idAttributeName(idAttr)
432 #if ENABLE(FULLSCREEN_API)
433     , m_areKeysEnabledInFullScreen(0)
434     , m_fullScreenRenderer(0)
435     , m_fullScreenChangeDelayTimer(this, &Document::fullScreenChangeDelayTimerFired)
436 #endif
437     , m_loadEventDelayCount(0)
438     , m_loadEventDelayTimer(this, &Document::loadEventDelayTimerFired)
439     , m_directionSetOnDocumentElement(false)
440     , m_writingModeSetOnDocumentElement(false)
441     , m_writeRecursionIsTooDeep(false)
442     , m_writeRecursionDepth(0)
443 {
444     m_document = this;
445 
446     m_pageGroupUserSheetCacheValid = false;
447 
448     m_printing = false;
449     m_paginatedForScreen = false;
450 
451     m_ignoreAutofocus = false;
452 
453     m_frame = frame;
454 
455     // We depend on the url getting immediately set in subframes, but we
456     // also depend on the url NOT getting immediately set in opened windows.
457     // See fast/dom/early-frame-url.html
458     // and fast/dom/location-new-window-no-crash.html, respectively.
459     // FIXME: Can/should we unify this behavior?
460     if ((frame && frame->ownerElement()) || !url.isEmpty())
461         setURL(url);
462 
463 #if !PLATFORM(ANDROID)
464     m_axObjectCache = 0;
465 #endif
466 
467     m_markers = new DocumentMarkerController();
468 
469     m_cachedResourceLoader = new CachedResourceLoader(this);
470 
471     m_visuallyOrdered = false;
472     m_bParsing = false;
473     m_wellFormed = false;
474 
475     m_textColor = Color::black;
476     m_listenerTypes = 0;
477     setInDocument();
478     m_inStyleRecalc = false;
479     m_closeAfterStyleRecalc = false;
480 
481     m_usesSiblingRules = false;
482     m_usesSiblingRulesOverride = false;
483     m_usesFirstLineRules = false;
484     m_usesFirstLetterRules = false;
485     m_usesBeforeAfterRules = false;
486     m_usesBeforeAfterRulesOverride = false;
487     m_usesRemUnits = false;
488     m_usesLinkRules = false;
489 
490     m_gotoAnchorNeededAfterStylesheetsLoad = false;
491 
492     m_didCalculateStyleSelector = false;
493     m_hasDirtyStyleSelector = false;
494     m_pendingStylesheets = 0;
495     m_ignorePendingStylesheets = false;
496     m_hasNodesWithPlaceholderStyle = false;
497     m_pendingSheetLayout = NoLayoutWithPendingSheets;
498 
499     m_cssTarget = 0;
500 
501     resetLinkColor();
502     resetVisitedLinkColor();
503     resetActiveLinkColor();
504 
505     m_processingLoadEvent = false;
506 
507     initSecurityContext();
508     initDNSPrefetch();
509 
510     static int docID = 0;
511     m_docID = docID++;
512 #if ENABLE(XHTMLMP)
513     m_shouldProcessNoScriptElement = !(m_frame && m_frame->script()->canExecuteScripts(NotAboutToExecuteScript));
514 #endif
515 }
516 
~Document()517 Document::~Document()
518 {
519     ASSERT(!renderer());
520     ASSERT(!m_inPageCache);
521     ASSERT(!m_savedRenderer);
522     ASSERT(m_ranges.isEmpty());
523     ASSERT(!m_styleRecalcTimer.isActive());
524     ASSERT(!m_parentTreeScope);
525 
526     m_scriptRunner.clear();
527 
528     removeAllEventListeners();
529 
530     // Currently we believe that Document can never outlive the parser.
531     // Although the Document may be replaced synchronously, DocumentParsers
532     // generally keep at least one reference to an Element which would in turn
533     // has a reference to the Document.  If you hit this ASSERT, then that
534     // assumption is wrong.  DocumentParser::detach() should ensure that even
535     // if the DocumentParser outlives the Document it won't cause badness.
536     ASSERT(!m_parser || m_parser->refCount() == 1);
537     detachParser();
538     m_document = 0;
539     m_cachedResourceLoader.clear();
540 
541     m_renderArena.clear();
542 
543     clearAXObjectCache();
544 
545     m_decoder = 0;
546 
547     for (size_t i = 0; i < m_nameCollectionInfo.size(); ++i)
548         deleteAllValues(m_nameCollectionInfo[i]);
549 
550     if (m_styleSheets)
551         m_styleSheets->documentDestroyed();
552 
553     if (m_elemSheet)
554         m_elemSheet->clearOwnerNode();
555     if (m_mappedElementSheet)
556         m_mappedElementSheet->clearOwnerNode();
557     if (m_pageUserSheet)
558         m_pageUserSheet->clearOwnerNode();
559     if (m_pageGroupUserSheets) {
560         for (size_t i = 0; i < m_pageGroupUserSheets->size(); ++i)
561             (*m_pageGroupUserSheets)[i]->clearOwnerNode();
562     }
563 
564     deleteRetiredCustomFonts();
565 
566     m_weakReference->clear();
567 
568     if (m_mediaQueryMatcher)
569         m_mediaQueryMatcher->documentDestroyed();
570 
571     if (m_implementation)
572         m_implementation->ownerDocumentDestroyed();
573 }
574 
removedLastRef()575 void Document::removedLastRef()
576 {
577     ASSERT(!m_deletionHasBegun);
578     if (m_guardRefCount) {
579         // If removing a child removes the last self-only ref, we don't
580         // want the scope to be destructed until after
581         // removeAllChildren returns, so we guard ourselves with an
582         // extra self-only ref.
583         guardRef();
584 
585         // We must make sure not to be retaining any of our children through
586         // these extra pointers or we will create a reference cycle.
587         m_docType = 0;
588         m_focusedNode = 0;
589         m_hoverNode = 0;
590         m_activeNode = 0;
591         m_titleElement = 0;
592         m_documentElement = 0;
593 #if ENABLE(FULLSCREEN_API)
594         m_fullScreenElement = 0;
595 #endif
596 
597         // removeAllChildren() doesn't always unregister IDs,
598         // so tear down scope information upfront to avoid having stale references in the map.
599         destroyTreeScopeData();
600         removeAllChildren();
601 
602         m_markers->detach();
603 
604         detachParser();
605 
606         m_cssCanvasElements.clear();
607 
608 #if ENABLE(REQUEST_ANIMATION_FRAME)
609         // FIXME: consider using ActiveDOMObject.
610         m_scriptedAnimationController = 0;
611 #endif
612 
613 #ifndef NDEBUG
614         m_inRemovedLastRefFunction = false;
615 #endif
616 
617         guardDeref();
618     } else {
619 #ifndef NDEBUG
620         m_deletionHasBegun = true;
621 #endif
622         delete this;
623     }
624 }
625 
getElementById(const AtomicString & id) const626 Element* Document::getElementById(const AtomicString& id) const
627 {
628     return TreeScope::getElementById(id);
629 }
630 
mediaQueryMatcher()631 MediaQueryMatcher* Document::mediaQueryMatcher()
632 {
633     if (!m_mediaQueryMatcher)
634         m_mediaQueryMatcher = MediaQueryMatcher::create(this);
635     return m_mediaQueryMatcher.get();
636 }
637 
setCompatibilityMode(CompatibilityMode mode)638 void Document::setCompatibilityMode(CompatibilityMode mode)
639 {
640     if (m_compatibilityModeLocked || mode == m_compatibilityMode)
641         return;
642     ASSERT(!documentElement() && !m_styleSheets->length());
643     bool wasInQuirksMode = inQuirksMode();
644     m_compatibilityMode = mode;
645     if (inQuirksMode() != wasInQuirksMode) {
646         // All user stylesheets have to reparse using the different mode.
647         clearPageUserSheet();
648         clearPageGroupUserSheets();
649     }
650 }
651 
compatMode() const652 String Document::compatMode() const
653 {
654     return inQuirksMode() ? "BackCompat" : "CSS1Compat";
655 }
656 
resetLinkColor()657 void Document::resetLinkColor()
658 {
659     m_linkColor = Color(0, 0, 238);
660 }
661 
resetVisitedLinkColor()662 void Document::resetVisitedLinkColor()
663 {
664     m_visitedLinkColor = Color(85, 26, 139);
665 }
666 
resetActiveLinkColor()667 void Document::resetActiveLinkColor()
668 {
669     m_activeLinkColor.setNamedColor("red");
670 }
671 
setDocType(PassRefPtr<DocumentType> docType)672 void Document::setDocType(PassRefPtr<DocumentType> docType)
673 {
674     // This should never be called more than once.
675     ASSERT(!m_docType || !docType);
676     m_docType = docType;
677     if (m_docType)
678         m_docType->setTreeScope(this);
679 
680 #ifdef ANDROID_META_SUPPORT
681     if (m_docType && !ownerElement()
682             && m_docType->publicId().startsWith("-//wapforum//dtd xhtml mobile 1.", false)) {
683         // fit mobile sites directly in the screen
684         processViewport("width=device-width");
685     }
686 #endif
687 }
688 
implementation()689 DOMImplementation* Document::implementation()
690 {
691     if (!m_implementation)
692         m_implementation = DOMImplementation::create(this);
693     return m_implementation.get();
694 }
695 
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)696 void Document::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
697 {
698     TreeScope::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
699 
700     // Invalidate the document element we have cached in case it was replaced.
701     m_documentElement = 0;
702 }
703 
cacheDocumentElement() const704 void Document::cacheDocumentElement() const
705 {
706     ASSERT(!m_documentElement);
707     m_documentElement = firstElementChild(this);
708 }
709 
createElement(const AtomicString & name,ExceptionCode & ec)710 PassRefPtr<Element> Document::createElement(const AtomicString& name, ExceptionCode& ec)
711 {
712     if (!isValidName(name)) {
713         ec = INVALID_CHARACTER_ERR;
714         return 0;
715     }
716 
717     if (m_isXHTML)
718         return HTMLElementFactory::createHTMLElement(QualifiedName(nullAtom, name, xhtmlNamespaceURI), this, 0, false);
719 
720     return createElement(QualifiedName(nullAtom, name, nullAtom), false);
721 }
722 
createDocumentFragment()723 PassRefPtr<DocumentFragment> Document::createDocumentFragment()
724 {
725     return DocumentFragment::create(document());
726 }
727 
createTextNode(const String & data)728 PassRefPtr<Text> Document::createTextNode(const String& data)
729 {
730     return Text::create(this, data);
731 }
732 
createComment(const String & data)733 PassRefPtr<Comment> Document::createComment(const String& data)
734 {
735     return Comment::create(this, data);
736 }
737 
createCDATASection(const String & data,ExceptionCode & ec)738 PassRefPtr<CDATASection> Document::createCDATASection(const String& data, ExceptionCode& ec)
739 {
740     if (isHTMLDocument()) {
741         ec = NOT_SUPPORTED_ERR;
742         return 0;
743     }
744     return CDATASection::create(this, data);
745 }
746 
createProcessingInstruction(const String & target,const String & data,ExceptionCode & ec)747 PassRefPtr<ProcessingInstruction> Document::createProcessingInstruction(const String& target, const String& data, ExceptionCode& ec)
748 {
749     if (!isValidName(target)) {
750         ec = INVALID_CHARACTER_ERR;
751         return 0;
752     }
753     if (isHTMLDocument()) {
754         ec = NOT_SUPPORTED_ERR;
755         return 0;
756     }
757     return ProcessingInstruction::create(this, target, data);
758 }
759 
createEntityReference(const String & name,ExceptionCode & ec)760 PassRefPtr<EntityReference> Document::createEntityReference(const String& name, ExceptionCode& ec)
761 {
762     if (!isValidName(name)) {
763         ec = INVALID_CHARACTER_ERR;
764         return 0;
765     }
766     if (isHTMLDocument()) {
767         ec = NOT_SUPPORTED_ERR;
768         return 0;
769     }
770     return EntityReference::create(this, name);
771 }
772 
createEditingTextNode(const String & text)773 PassRefPtr<EditingText> Document::createEditingTextNode(const String& text)
774 {
775     return EditingText::create(this, text);
776 }
777 
createCSSStyleDeclaration()778 PassRefPtr<CSSStyleDeclaration> Document::createCSSStyleDeclaration()
779 {
780     return CSSMutableStyleDeclaration::create();
781 }
782 
importNode(Node * importedNode,bool deep,ExceptionCode & ec)783 PassRefPtr<Node> Document::importNode(Node* importedNode, bool deep, ExceptionCode& ec)
784 {
785     ec = 0;
786 
787     if (!importedNode
788 #if ENABLE(SVG) && ENABLE(DASHBOARD_SUPPORT)
789         || (importedNode->isSVGElement() && page() && page()->settings()->usesDashboardBackwardCompatibilityMode())
790 #endif
791         ) {
792         ec = NOT_SUPPORTED_ERR;
793         return 0;
794     }
795 
796     switch (importedNode->nodeType()) {
797     case TEXT_NODE:
798         return createTextNode(importedNode->nodeValue());
799     case CDATA_SECTION_NODE:
800         return createCDATASection(importedNode->nodeValue(), ec);
801     case ENTITY_REFERENCE_NODE:
802         return createEntityReference(importedNode->nodeName(), ec);
803     case PROCESSING_INSTRUCTION_NODE:
804         return createProcessingInstruction(importedNode->nodeName(), importedNode->nodeValue(), ec);
805     case COMMENT_NODE:
806         return createComment(importedNode->nodeValue());
807     case ELEMENT_NODE: {
808         Element* oldElement = static_cast<Element*>(importedNode);
809         RefPtr<Element> newElement = createElementNS(oldElement->namespaceURI(), oldElement->tagQName().toString(), ec);
810 
811         if (ec)
812             return 0;
813 
814         NamedNodeMap* attrs = oldElement->attributes(true);
815         if (attrs) {
816             unsigned length = attrs->length();
817             for (unsigned i = 0; i < length; i++) {
818                 Attribute* attr = attrs->attributeItem(i);
819                 newElement->setAttribute(attr->name(), attr->value().impl(), ec);
820                 if (ec)
821                     return 0;
822             }
823         }
824 
825         newElement->copyNonAttributeProperties(oldElement);
826 
827         if (deep) {
828             for (Node* oldChild = oldElement->firstChild(); oldChild; oldChild = oldChild->nextSibling()) {
829                 RefPtr<Node> newChild = importNode(oldChild, true, ec);
830                 if (ec)
831                     return 0;
832                 newElement->appendChild(newChild.release(), ec);
833                 if (ec)
834                     return 0;
835             }
836         }
837 
838         return newElement.release();
839     }
840     case ATTRIBUTE_NODE:
841         return Attr::create(0, this, static_cast<Attr*>(importedNode)->attr()->clone());
842     case DOCUMENT_FRAGMENT_NODE: {
843         DocumentFragment* oldFragment = static_cast<DocumentFragment*>(importedNode);
844         RefPtr<DocumentFragment> newFragment = createDocumentFragment();
845         if (deep) {
846             for (Node* oldChild = oldFragment->firstChild(); oldChild; oldChild = oldChild->nextSibling()) {
847                 RefPtr<Node> newChild = importNode(oldChild, true, ec);
848                 if (ec)
849                     return 0;
850                 newFragment->appendChild(newChild.release(), ec);
851                 if (ec)
852                     return 0;
853             }
854         }
855 
856         return newFragment.release();
857     }
858     case ENTITY_NODE:
859     case NOTATION_NODE:
860         // 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.
861         // Ability to add these imported nodes to a DocumentType will be considered for addition to a future release of the DOM.
862     case DOCUMENT_NODE:
863     case DOCUMENT_TYPE_NODE:
864     case XPATH_NAMESPACE_NODE:
865         break;
866     }
867 
868     ec = NOT_SUPPORTED_ERR;
869     return 0;
870 }
871 
872 
adoptNode(PassRefPtr<Node> source,ExceptionCode & ec)873 PassRefPtr<Node> Document::adoptNode(PassRefPtr<Node> source, ExceptionCode& ec)
874 {
875     if (!source) {
876         ec = NOT_SUPPORTED_ERR;
877         return 0;
878     }
879 
880     if (source->isReadOnlyNode()) {
881         ec = NO_MODIFICATION_ALLOWED_ERR;
882         return 0;
883     }
884 
885     EventQueueScope scope;
886 
887     switch (source->nodeType()) {
888     case ENTITY_NODE:
889     case NOTATION_NODE:
890     case DOCUMENT_NODE:
891     case DOCUMENT_TYPE_NODE:
892     case XPATH_NAMESPACE_NODE:
893         ec = NOT_SUPPORTED_ERR;
894         return 0;
895     case ATTRIBUTE_NODE: {
896         Attr* attr = static_cast<Attr*>(source.get());
897         if (attr->ownerElement())
898             attr->ownerElement()->removeAttributeNode(attr, ec);
899         attr->setSpecified(true);
900         break;
901     }
902     default:
903         if (source->hasTagName(iframeTag)) {
904             HTMLIFrameElement* iframe = static_cast<HTMLIFrameElement*>(source.get());
905             if (frame() && frame()->tree()->isDescendantOf(iframe->contentFrame())) {
906                 ec = HIERARCHY_REQUEST_ERR;
907                 return 0;
908             }
909             iframe->setRemainsAliveOnRemovalFromTree(attached() && source->attached());
910         }
911 
912         if (source->parentNode())
913             source->parentNode()->removeChild(source.get(), ec);
914     }
915 
916     source->setTreeScopeRecursively(this);
917 
918     return source;
919 }
920 
hasPrefixNamespaceMismatch(const QualifiedName & qName)921 bool Document::hasPrefixNamespaceMismatch(const QualifiedName& qName)
922 {
923     // These checks are from DOM Core Level 2, createElementNS
924     // http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-DocCrElNS
925     if (!qName.prefix().isEmpty() && qName.namespaceURI().isNull()) // createElementNS(null, "html:div")
926         return true;
927     if (qName.prefix() == xmlAtom && qName.namespaceURI() != XMLNames::xmlNamespaceURI) // createElementNS("http://www.example.com", "xml:lang")
928         return true;
929 
930     // Required by DOM Level 3 Core and unspecified by DOM Level 2 Core:
931     // http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#ID-DocCrElNS
932     // createElementNS("http://www.w3.org/2000/xmlns/", "foo:bar"), createElementNS(null, "xmlns:bar")
933     if ((qName.prefix() == xmlnsAtom && qName.namespaceURI() != XMLNSNames::xmlnsNamespaceURI) || (qName.prefix() != xmlnsAtom && qName.namespaceURI() == XMLNSNames::xmlnsNamespaceURI))
934         return true;
935 
936     return false;
937 }
938 
939 // FIXME: This should really be in a possible ElementFactory class
createElement(const QualifiedName & qName,bool createdByParser)940 PassRefPtr<Element> Document::createElement(const QualifiedName& qName, bool createdByParser)
941 {
942     RefPtr<Element> e;
943 
944     // FIXME: Use registered namespaces and look up in a hash to find the right factory.
945     if (qName.namespaceURI() == xhtmlNamespaceURI)
946         e = HTMLElementFactory::createHTMLElement(qName, this, 0, createdByParser);
947 #if ENABLE(SVG)
948     else if (qName.namespaceURI() == SVGNames::svgNamespaceURI)
949         e = SVGElementFactory::createSVGElement(qName, this, createdByParser);
950 #endif
951 #if ENABLE(WML)
952     else if (qName.namespaceURI() == WMLNames::wmlNamespaceURI)
953         e = WMLElementFactory::createWMLElement(qName, this, createdByParser);
954     else if (isWMLDocument())
955         e = WMLElementFactory::createWMLElement(QualifiedName(nullAtom, qName.localName(), WMLNames::wmlNamespaceURI), this, createdByParser);
956 #endif
957 #if ENABLE(MATHML)
958     else if (qName.namespaceURI() == MathMLNames::mathmlNamespaceURI)
959         e = MathMLElementFactory::createMathMLElement(qName, this, createdByParser);
960 #endif
961 
962     if (e)
963         m_sawElementsInKnownNamespaces = true;
964     else
965         e = Element::create(qName, document());
966 
967     // <image> uses imgTag so we need a special rule.
968 #if ENABLE(WML)
969     if (!isWMLDocument())
970 #endif
971     ASSERT((qName.matches(imageTag) && e->tagQName().matches(imgTag) && e->tagQName().prefix() == qName.prefix()) || qName == e->tagQName());
972 
973     return e.release();
974 }
975 
createElementNS(const String & namespaceURI,const String & qualifiedName,ExceptionCode & ec)976 PassRefPtr<Element> Document::createElementNS(const String& namespaceURI, const String& qualifiedName, ExceptionCode& ec)
977 {
978     String prefix, localName;
979     if (!parseQualifiedName(qualifiedName, prefix, localName, ec))
980         return 0;
981 
982     QualifiedName qName(prefix, localName, namespaceURI);
983     if (hasPrefixNamespaceMismatch(qName)) {
984         ec = NAMESPACE_ERR;
985         return 0;
986     }
987 
988     return createElement(qName, false);
989 }
990 
readyState() const991 String Document::readyState() const
992 {
993     DEFINE_STATIC_LOCAL(const String, loading, ("loading"));
994     DEFINE_STATIC_LOCAL(const String, interactive, ("interactive"));
995     DEFINE_STATIC_LOCAL(const String, complete, ("complete"));
996 
997     switch (m_readyState) {
998     case Loading:
999         return loading;
1000     case Interactive:
1001         return interactive;
1002     case Complete:
1003         return complete;
1004     }
1005 
1006     ASSERT_NOT_REACHED();
1007     return String();
1008 }
1009 
setReadyState(ReadyState readyState)1010 void Document::setReadyState(ReadyState readyState)
1011 {
1012     if (readyState == m_readyState)
1013         return;
1014 
1015     switch (readyState) {
1016     case Loading:
1017         if (!m_documentTiming.domLoading)
1018             m_documentTiming.domLoading = currentTime();
1019         break;
1020     case Interactive:
1021         if (!m_documentTiming.domInteractive)
1022             m_documentTiming.domInteractive = currentTime();
1023         break;
1024     case Complete:
1025         if (!m_documentTiming.domComplete)
1026             m_documentTiming.domComplete = currentTime();
1027         break;
1028     }
1029 
1030     m_readyState = readyState;
1031     dispatchEvent(Event::create(eventNames().readystatechangeEvent, false, false));
1032 }
1033 
encoding() const1034 String Document::encoding() const
1035 {
1036     if (TextResourceDecoder* d = decoder())
1037         return d->encoding().domName();
1038     return String();
1039 }
1040 
defaultCharset() const1041 String Document::defaultCharset() const
1042 {
1043     if (Settings* settings = this->settings())
1044         return settings->defaultTextEncodingName();
1045     return String();
1046 }
1047 
setCharset(const String & charset)1048 void Document::setCharset(const String& charset)
1049 {
1050     if (!decoder())
1051         return;
1052     decoder()->setEncoding(charset, TextResourceDecoder::UserChosenEncoding);
1053 }
1054 
setXMLVersion(const String & version,ExceptionCode & ec)1055 void Document::setXMLVersion(const String& version, ExceptionCode& ec)
1056 {
1057     if (!implementation()->hasFeature("XML", String())) {
1058         ec = NOT_SUPPORTED_ERR;
1059         return;
1060     }
1061 
1062     if (!XMLDocumentParser::supportsXMLVersion(version)) {
1063         ec = NOT_SUPPORTED_ERR;
1064         return;
1065     }
1066 
1067     m_xmlVersion = version;
1068 }
1069 
setXMLStandalone(bool standalone,ExceptionCode & ec)1070 void Document::setXMLStandalone(bool standalone, ExceptionCode& ec)
1071 {
1072     if (!implementation()->hasFeature("XML", String())) {
1073         ec = NOT_SUPPORTED_ERR;
1074         return;
1075     }
1076 
1077     m_xmlStandalone = standalone;
1078 }
1079 
setDocumentURI(const String & uri)1080 void Document::setDocumentURI(const String& uri)
1081 {
1082     m_documentURI = uri;
1083     updateBaseURL();
1084 }
1085 
baseURI() const1086 KURL Document::baseURI() const
1087 {
1088     return m_baseURL;
1089 }
1090 
setContent(const String & content)1091 void Document::setContent(const String& content)
1092 {
1093     open();
1094     m_parser->append(content);
1095     close();
1096 }
1097 
1098 // FIXME: We need to discuss the DOM API here at some point. Ideas:
1099 // * making it receive a rect as parameter, i.e. nodesFromRect(x, y, w, h);
1100 // * making it receive the expading size of each direction separately,
1101 //   i.e. nodesFromRect(x, y, topSize, rightSize, bottomSize, leftSize);
nodesFromRect(int centerX,int centerY,unsigned topPadding,unsigned rightPadding,unsigned bottomPadding,unsigned leftPadding,bool ignoreClipping) const1102 PassRefPtr<NodeList> Document::nodesFromRect(int centerX, int centerY, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding, bool ignoreClipping) const
1103 {
1104     // FIXME: Share code between this, elementFromPoint and caretRangeFromPoint.
1105     if (!renderer())
1106         return 0;
1107     Frame* frame = this->frame();
1108     if (!frame)
1109         return 0;
1110     FrameView* frameView = frame->view();
1111     if (!frameView)
1112         return 0;
1113 
1114     float zoomFactor = frame->pageZoomFactor();
1115     IntPoint point = roundedIntPoint(FloatPoint(centerX * zoomFactor + view()->scrollX(), centerY * zoomFactor + view()->scrollY()));
1116 
1117     int type = HitTestRequest::ReadOnly | HitTestRequest::Active;
1118 
1119     // When ignoreClipping is false, this method returns null for coordinates outside of the viewport.
1120     if (ignoreClipping)
1121         type |= HitTestRequest::IgnoreClipping;
1122     else if (!frameView->visibleContentRect().intersects(HitTestResult::rectForPoint(point, topPadding, rightPadding, bottomPadding, leftPadding)))
1123         return 0;
1124 
1125     HitTestRequest request(type);
1126 
1127     // Passing a zero padding will trigger a rect hit test, however for the purposes of nodesFromRect,
1128     // we special handle this case in order to return a valid NodeList.
1129     if (!topPadding && !rightPadding && !bottomPadding && !leftPadding) {
1130         HitTestResult result(point);
1131         return handleZeroPadding(request, result);
1132     }
1133 
1134     HitTestResult result(point, topPadding, rightPadding, bottomPadding, leftPadding);
1135     renderView()->layer()->hitTest(request, result);
1136 
1137     return StaticHashSetNodeList::adopt(result.rectBasedTestResult());
1138 }
1139 
handleZeroPadding(const HitTestRequest & request,HitTestResult & result) const1140 PassRefPtr<NodeList> Document::handleZeroPadding(const HitTestRequest& request, HitTestResult& result) const
1141 {
1142     renderView()->layer()->hitTest(request, result);
1143 
1144     Node* node = result.innerNode();
1145     if (!node)
1146         return 0;
1147 
1148     node = node->shadowAncestorNode();
1149     ListHashSet<RefPtr<Node> > list;
1150     list.add(node);
1151     return StaticHashSetNodeList::adopt(list);
1152 }
1153 
nodeFromPoint(Frame * frame,RenderView * renderView,int x,int y,IntPoint * localPoint=0)1154 static Node* nodeFromPoint(Frame* frame, RenderView* renderView, int x, int y, IntPoint* localPoint = 0)
1155 {
1156     if (!frame)
1157         return 0;
1158     FrameView* frameView = frame->view();
1159     if (!frameView)
1160         return 0;
1161 
1162     float zoomFactor = frame->pageZoomFactor();
1163     IntPoint point = roundedIntPoint(FloatPoint(x * zoomFactor  + frameView->scrollX(), y * zoomFactor + frameView->scrollY()));
1164 
1165     if (!frameView->visibleContentRect().contains(point))
1166         return 0;
1167 
1168     HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
1169     HitTestResult result(point);
1170     renderView->layer()->hitTest(request, result);
1171 
1172     if (localPoint)
1173         *localPoint = result.localPoint();
1174 
1175     return result.innerNode();
1176 }
1177 
elementFromPoint(int x,int y) const1178 Element* Document::elementFromPoint(int x, int y) const
1179 {
1180     if (!renderer())
1181         return 0;
1182     Node* node = nodeFromPoint(frame(), renderView(), x, y);
1183     while (node && !node->isElementNode())
1184         node = node->parentNode();
1185     if (node)
1186         node = node->shadowAncestorNode();
1187     return static_cast<Element*>(node);
1188 }
1189 
caretRangeFromPoint(int x,int y)1190 PassRefPtr<Range> Document::caretRangeFromPoint(int x, int y)
1191 {
1192     if (!renderer())
1193         return 0;
1194     IntPoint localPoint;
1195     Node* node = nodeFromPoint(frame(), renderView(), x, y, &localPoint);
1196     if (!node)
1197         return 0;
1198 
1199     Node* shadowAncestorNode = node->shadowAncestorNode();
1200     if (shadowAncestorNode != node) {
1201         unsigned offset = shadowAncestorNode->nodeIndex();
1202         ContainerNode* container = shadowAncestorNode->parentNode();
1203         return Range::create(this, container, offset, container, offset);
1204     }
1205 
1206     RenderObject* renderer = node->renderer();
1207     if (!renderer)
1208         return 0;
1209     VisiblePosition visiblePosition = renderer->positionForPoint(localPoint);
1210     if (visiblePosition.isNull())
1211         return 0;
1212 
1213     Position rangeCompliantPosition = visiblePosition.deepEquivalent().parentAnchoredEquivalent();
1214     return Range::create(this, rangeCompliantPosition, rangeCompliantPosition);
1215 }
1216 
1217 /*
1218  * Performs three operations:
1219  *  1. Convert control characters to spaces
1220  *  2. Trim leading and trailing spaces
1221  *  3. Collapse internal whitespace.
1222  */
canonicalizedTitle(Document * document,const StringWithDirection & titleWithDirection)1223 static inline StringWithDirection canonicalizedTitle(Document* document, const StringWithDirection& titleWithDirection)
1224 {
1225     const String& title = titleWithDirection.string();
1226     const UChar* characters = title.characters();
1227     unsigned length = title.length();
1228     unsigned i;
1229 
1230     StringBuffer buffer(length);
1231     unsigned builderIndex = 0;
1232 
1233     // Skip leading spaces and leading characters that would convert to spaces
1234     for (i = 0; i < length; ++i) {
1235         UChar c = characters[i];
1236         if (!(c <= 0x20 || c == 0x7F))
1237             break;
1238     }
1239 
1240     if (i == length)
1241         return StringWithDirection();
1242 
1243     // Replace control characters with spaces, and backslashes with currency symbols, and collapse whitespace.
1244     bool previousCharWasWS = false;
1245     for (; i < length; ++i) {
1246         UChar c = characters[i];
1247         if (c <= 0x20 || c == 0x7F || (WTF::Unicode::category(c) & (WTF::Unicode::Separator_Line | WTF::Unicode::Separator_Paragraph))) {
1248             if (previousCharWasWS)
1249                 continue;
1250             buffer[builderIndex++] = ' ';
1251             previousCharWasWS = true;
1252         } else {
1253             buffer[builderIndex++] = c;
1254             previousCharWasWS = false;
1255         }
1256     }
1257 
1258     // Strip trailing spaces
1259     while (builderIndex > 0) {
1260         --builderIndex;
1261         if (buffer[builderIndex] != ' ')
1262             break;
1263     }
1264 
1265     if (!builderIndex && buffer[builderIndex] == ' ')
1266         return StringWithDirection();
1267 
1268     buffer.shrink(builderIndex + 1);
1269 
1270     // Replace the backslashes with currency symbols if the encoding requires it.
1271     document->displayBufferModifiedByEncoding(buffer.characters(), buffer.length());
1272 
1273     return StringWithDirection(String::adopt(buffer), titleWithDirection.direction());
1274 }
1275 
updateTitle(const StringWithDirection & title)1276 void Document::updateTitle(const StringWithDirection& title)
1277 {
1278     if (m_rawTitle == title)
1279         return;
1280 
1281     m_rawTitle = title;
1282     m_title = canonicalizedTitle(this, m_rawTitle);
1283     if (Frame* f = frame())
1284         f->loader()->setTitle(m_title);
1285 }
1286 
setTitle(const String & title)1287 void Document::setTitle(const String& title)
1288 {
1289     // Title set by JavaScript -- overrides any title elements.
1290     m_titleSetExplicitly = true;
1291     if (!isHTMLDocument())
1292         m_titleElement = 0;
1293     else if (!m_titleElement) {
1294         if (HTMLElement* headElement = head()) {
1295             m_titleElement = createElement(titleTag, false);
1296             ExceptionCode ec = 0;
1297             headElement->appendChild(m_titleElement, ec);
1298             ASSERT(!ec);
1299         }
1300     }
1301 
1302     // The DOM API has no method of specifying direction, so assume LTR.
1303     updateTitle(StringWithDirection(title, LTR));
1304 
1305     if (m_titleElement) {
1306         ASSERT(m_titleElement->hasTagName(titleTag));
1307         if (m_titleElement->hasTagName(titleTag))
1308             static_cast<HTMLTitleElement*>(m_titleElement.get())->setText(title);
1309     }
1310 }
1311 
setTitleElement(const StringWithDirection & title,Element * titleElement)1312 void Document::setTitleElement(const StringWithDirection& title, Element* titleElement)
1313 {
1314     if (titleElement != m_titleElement) {
1315         if (m_titleElement || m_titleSetExplicitly)
1316             // Only allow the first title element to change the title -- others have no effect.
1317             return;
1318         m_titleElement = titleElement;
1319     }
1320 
1321     updateTitle(title);
1322 }
1323 
removeTitle(Element * titleElement)1324 void Document::removeTitle(Element* titleElement)
1325 {
1326     if (m_titleElement != titleElement)
1327         return;
1328 
1329     m_titleElement = 0;
1330     m_titleSetExplicitly = false;
1331 
1332     // Update title based on first title element in the head, if one exists.
1333     if (HTMLElement* headElement = head()) {
1334         for (Node* e = headElement->firstChild(); e; e = e->nextSibling())
1335             if (e->hasTagName(titleTag)) {
1336                 HTMLTitleElement* titleElement = static_cast<HTMLTitleElement*>(e);
1337                 setTitleElement(titleElement->textWithDirection(), titleElement);
1338                 break;
1339             }
1340     }
1341 
1342     if (!m_titleElement)
1343         updateTitle(StringWithDirection());
1344 }
1345 
nodeName() const1346 String Document::nodeName() const
1347 {
1348     return "#document";
1349 }
1350 
nodeType() const1351 Node::NodeType Document::nodeType() const
1352 {
1353     return DOCUMENT_NODE;
1354 }
1355 
view() const1356 FrameView* Document::view() const
1357 {
1358     return m_frame ? m_frame->view() : 0;
1359 }
1360 
page() const1361 Page* Document::page() const
1362 {
1363     return m_frame ? m_frame->page() : 0;
1364 }
1365 
settings() const1366 Settings* Document::settings() const
1367 {
1368     return m_frame ? m_frame->settings() : 0;
1369 }
1370 
createRange()1371 PassRefPtr<Range> Document::createRange()
1372 {
1373     return Range::create(this);
1374 }
1375 
createNodeIterator(Node * root,unsigned whatToShow,PassRefPtr<NodeFilter> filter,bool expandEntityReferences,ExceptionCode & ec)1376 PassRefPtr<NodeIterator> Document::createNodeIterator(Node* root, unsigned whatToShow,
1377     PassRefPtr<NodeFilter> filter, bool expandEntityReferences, ExceptionCode& ec)
1378 {
1379     if (!root) {
1380         ec = NOT_SUPPORTED_ERR;
1381         return 0;
1382     }
1383     return NodeIterator::create(root, whatToShow, filter, expandEntityReferences);
1384 }
1385 
createTreeWalker(Node * root,unsigned whatToShow,PassRefPtr<NodeFilter> filter,bool expandEntityReferences,ExceptionCode & ec)1386 PassRefPtr<TreeWalker> Document::createTreeWalker(Node* root, unsigned whatToShow,
1387     PassRefPtr<NodeFilter> filter, bool expandEntityReferences, ExceptionCode& ec)
1388 {
1389     if (!root) {
1390         ec = NOT_SUPPORTED_ERR;
1391         return 0;
1392     }
1393     return TreeWalker::create(root, whatToShow, filter, expandEntityReferences);
1394 }
1395 
scheduleForcedStyleRecalc()1396 void Document::scheduleForcedStyleRecalc()
1397 {
1398     m_pendingStyleRecalcShouldForce = true;
1399     scheduleStyleRecalc();
1400 }
1401 
scheduleStyleRecalc()1402 void Document::scheduleStyleRecalc()
1403 {
1404     if (m_styleRecalcTimer.isActive() || inPageCache())
1405         return;
1406 
1407     ASSERT(childNeedsStyleRecalc() || m_pendingStyleRecalcShouldForce);
1408 
1409     if (!documentsThatNeedStyleRecalc)
1410         documentsThatNeedStyleRecalc = new HashSet<Document*>;
1411     documentsThatNeedStyleRecalc->add(this);
1412 
1413     // FIXME: Why on earth is this here? This is clearly misplaced.
1414     invalidateAccessKeyMap();
1415 
1416     m_styleRecalcTimer.startOneShot(0);
1417 }
1418 
unscheduleStyleRecalc()1419 void Document::unscheduleStyleRecalc()
1420 {
1421     ASSERT(!childNeedsStyleRecalc());
1422 
1423     if (documentsThatNeedStyleRecalc)
1424         documentsThatNeedStyleRecalc->remove(this);
1425 
1426     m_styleRecalcTimer.stop();
1427     m_pendingStyleRecalcShouldForce = false;
1428 }
1429 
isPendingStyleRecalc() const1430 bool Document::isPendingStyleRecalc() const
1431 {
1432     return m_styleRecalcTimer.isActive() && !m_inStyleRecalc;
1433 }
1434 
styleRecalcTimerFired(Timer<Document> *)1435 void Document::styleRecalcTimerFired(Timer<Document>*)
1436 {
1437     updateStyleIfNeeded();
1438 }
1439 
childNeedsAndNotInStyleRecalc()1440 bool Document::childNeedsAndNotInStyleRecalc()
1441 {
1442     return childNeedsStyleRecalc() && !m_inStyleRecalc;
1443 }
1444 
recalcStyle(StyleChange change)1445 void Document::recalcStyle(StyleChange change)
1446 {
1447     // we should not enter style recalc while painting
1448     if (view() && view()->isPainting()) {
1449         ASSERT(!view()->isPainting());
1450         return;
1451     }
1452 
1453     if (m_inStyleRecalc)
1454         return; // Guard against re-entrancy. -dwh
1455 
1456     if (m_hasDirtyStyleSelector)
1457         recalcStyleSelector();
1458 
1459     InspectorInstrumentationCookie cookie = InspectorInstrumentation::willRecalculateStyle(this);
1460 
1461     m_inStyleRecalc = true;
1462     suspendPostAttachCallbacks();
1463     RenderWidget::suspendWidgetHierarchyUpdates();
1464 
1465     RefPtr<FrameView> frameView = view();
1466     if (frameView) {
1467         frameView->pauseScheduledEvents();
1468         frameView->beginDeferredRepaints();
1469     }
1470 
1471     ASSERT(!renderer() || renderArena());
1472     if (!renderer() || !renderArena())
1473         goto bail_out;
1474 
1475     if (m_pendingStyleRecalcShouldForce)
1476         change = Force;
1477 
1478     if (change == Force) {
1479         // style selector may set this again during recalc
1480         m_hasNodesWithPlaceholderStyle = false;
1481 
1482         RefPtr<RenderStyle> documentStyle = CSSStyleSelector::styleForDocument(this);
1483         StyleChange ch = diff(documentStyle.get(), renderer()->style());
1484         if (renderer() && ch != NoChange)
1485             renderer()->setStyle(documentStyle.release());
1486     }
1487 
1488     for (Node* n = firstChild(); n; n = n->nextSibling())
1489         if (change >= Inherit || n->childNeedsStyleRecalc() || n->needsStyleRecalc())
1490             n->recalcStyle(change);
1491 
1492     // FIXME: Disabling the deletion of retired custom font data until
1493     // we fix all the stale style bugs (68804, 68624, etc). These bugs
1494     // indicate problems where some styles were not updated in recalcStyle,
1495     // thereby retaining stale copy of font data. To prevent that, we
1496     // disable this code for now and only delete retired custom font data
1497     // in Document destructor.
1498     // Now that all RenderStyles that pointed to retired fonts have been updated, the fonts can safely be deleted.
1499     // deleteRetiredCustomFonts();
1500 
1501 #if USE(ACCELERATED_COMPOSITING)
1502     if (view()) {
1503         bool layoutPending = view()->layoutPending() || renderer()->needsLayout();
1504         // If we didn't update compositing layers because of layout(), we need to do so here.
1505         if (!layoutPending)
1506             view()->updateCompositingLayers();
1507     }
1508 #endif
1509 
1510 bail_out:
1511     clearNeedsStyleRecalc();
1512     clearChildNeedsStyleRecalc();
1513     unscheduleStyleRecalc();
1514 
1515     m_inStyleRecalc = false;
1516 
1517     // Pseudo element removal and similar may only work with these flags still set. Reset them after the style recalc.
1518     if (m_styleSelector) {
1519         m_usesSiblingRules = m_styleSelector->usesSiblingRules();
1520         m_usesFirstLineRules = m_styleSelector->usesFirstLineRules();
1521         m_usesBeforeAfterRules = m_styleSelector->usesBeforeAfterRules();
1522         m_usesLinkRules = m_styleSelector->usesLinkRules();
1523     }
1524 
1525     if (frameView) {
1526         frameView->resumeScheduledEvents();
1527         frameView->endDeferredRepaints();
1528     }
1529     RenderWidget::resumeWidgetHierarchyUpdates();
1530     resumePostAttachCallbacks();
1531 
1532     // If we wanted to call implicitClose() during recalcStyle, do so now that we're finished.
1533     if (m_closeAfterStyleRecalc) {
1534         m_closeAfterStyleRecalc = false;
1535         implicitClose();
1536     }
1537 
1538     InspectorInstrumentation::didRecalculateStyle(cookie);
1539 }
1540 
updateStyleIfNeeded()1541 void Document::updateStyleIfNeeded()
1542 {
1543     ASSERT(isMainThread());
1544     ASSERT(!view() || (!view()->isInLayout() && !view()->isPainting()));
1545 
1546     if ((!m_pendingStyleRecalcShouldForce && !childNeedsStyleRecalc()) || inPageCache())
1547         return;
1548 
1549     if (m_frame)
1550         m_frame->animation()->beginAnimationUpdate();
1551 
1552     recalcStyle(NoChange);
1553 
1554     // Tell the animation controller that updateStyleIfNeeded is finished and it can do any post-processing
1555     if (m_frame)
1556         m_frame->animation()->endAnimationUpdate();
1557 }
1558 
updateStyleForAllDocuments()1559 void Document::updateStyleForAllDocuments()
1560 {
1561     ASSERT(isMainThread());
1562     if (!documentsThatNeedStyleRecalc)
1563         return;
1564 
1565     while (documentsThatNeedStyleRecalc->size()) {
1566         HashSet<Document*>::iterator it = documentsThatNeedStyleRecalc->begin();
1567         Document* doc = *it;
1568         documentsThatNeedStyleRecalc->remove(doc);
1569         doc->updateStyleIfNeeded();
1570     }
1571 }
1572 
updateLayout()1573 void Document::updateLayout()
1574 {
1575     ASSERT(isMainThread());
1576     if (Element* oe = ownerElement())
1577         oe->document()->updateLayout();
1578 
1579     updateStyleIfNeeded();
1580 
1581     // Only do a layout if changes have occurred that make it necessary.
1582     FrameView* v = view();
1583     if (v && renderer() && (v->layoutPending() || renderer()->needsLayout()))
1584         v->layout();
1585 }
1586 
1587 // FIXME: This is a bad idea and needs to be removed eventually.
1588 // Other browsers load stylesheets before they continue parsing the web page.
1589 // Since we don't, we can run JavaScript code that needs answers before the
1590 // stylesheets are loaded. Doing a layout ignoring the pending stylesheets
1591 // lets us get reasonable answers. The long term solution to this problem is
1592 // to instead suspend JavaScript execution.
updateLayoutIgnorePendingStylesheets()1593 void Document::updateLayoutIgnorePendingStylesheets()
1594 {
1595     bool oldIgnore = m_ignorePendingStylesheets;
1596 
1597     if (!haveStylesheetsLoaded()) {
1598         m_ignorePendingStylesheets = true;
1599         // FIXME: We are willing to attempt to suppress painting with outdated style info only once.  Our assumption is that it would be
1600         // dangerous to try to stop it a second time, after page content has already been loaded and displayed
1601         // with accurate style information.  (Our suppression involves blanking the whole page at the
1602         // moment.  If it were more refined, we might be able to do something better.)
1603         // It's worth noting though that this entire method is a hack, since what we really want to do is
1604         // suspend JS instead of doing a layout with inaccurate information.
1605         if (body() && !body()->renderer() && m_pendingSheetLayout == NoLayoutWithPendingSheets) {
1606             m_pendingSheetLayout = DidLayoutWithPendingSheets;
1607             styleSelectorChanged(RecalcStyleImmediately);
1608         } else if (m_hasNodesWithPlaceholderStyle)
1609             // If new nodes have been added or style recalc has been done with style sheets still pending, some nodes
1610             // may not have had their real style calculated yet. Normally this gets cleaned when style sheets arrive
1611             // but here we need up-to-date style immediately.
1612             recalcStyle(Force);
1613     }
1614 
1615     updateLayout();
1616 
1617     m_ignorePendingStylesheets = oldIgnore;
1618 }
1619 
styleForElementIgnoringPendingStylesheets(Element * element)1620 PassRefPtr<RenderStyle> Document::styleForElementIgnoringPendingStylesheets(Element* element)
1621 {
1622     ASSERT_ARG(element, element->document() == this);
1623 
1624     bool oldIgnore = m_ignorePendingStylesheets;
1625     m_ignorePendingStylesheets = true;
1626     RefPtr<RenderStyle> style = styleSelector()->styleForElement(element, element->parentNode() ? element->parentNode()->computedStyle() : 0);
1627     m_ignorePendingStylesheets = oldIgnore;
1628     return style.release();
1629 }
1630 
styleForPage(int pageIndex)1631 PassRefPtr<RenderStyle> Document::styleForPage(int pageIndex)
1632 {
1633     RefPtr<RenderStyle> style = styleSelector()->styleForPage(pageIndex);
1634     return style.release();
1635 }
1636 
retireCustomFont(FontData * fontData)1637 void Document::retireCustomFont(FontData* fontData)
1638 {
1639     m_retiredCustomFonts.append(adoptPtr(fontData));
1640 }
1641 
deleteRetiredCustomFonts()1642 void Document::deleteRetiredCustomFonts()
1643 {
1644     size_t size = m_retiredCustomFonts.size();
1645     for (size_t i = 0; i < size; ++i)
1646         GlyphPageTreeNode::pruneTreeCustomFontData(m_retiredCustomFonts[i].get());
1647 
1648     m_retiredCustomFonts.clear();
1649 }
1650 
isPageBoxVisible(int pageIndex)1651 bool Document::isPageBoxVisible(int pageIndex)
1652 {
1653     RefPtr<RenderStyle> style = styleForPage(pageIndex);
1654     return style->visibility() != HIDDEN; // display property doesn't apply to @page.
1655 }
1656 
pageSizeAndMarginsInPixels(int pageIndex,IntSize & pageSize,int & marginTop,int & marginRight,int & marginBottom,int & marginLeft)1657 void Document::pageSizeAndMarginsInPixels(int pageIndex, IntSize& pageSize, int& marginTop, int& marginRight, int& marginBottom, int& marginLeft)
1658 {
1659     RefPtr<RenderStyle> style = styleForPage(pageIndex);
1660 
1661     int width = pageSize.width();
1662     int height = pageSize.height();
1663     switch (style->pageSizeType()) {
1664     case PAGE_SIZE_AUTO:
1665         break;
1666     case PAGE_SIZE_AUTO_LANDSCAPE:
1667         if (width < height)
1668             std::swap(width, height);
1669         break;
1670     case PAGE_SIZE_AUTO_PORTRAIT:
1671         if (width > height)
1672             std::swap(width, height);
1673         break;
1674     case PAGE_SIZE_RESOLVED: {
1675         LengthSize size = style->pageSize();
1676         ASSERT(size.width().isFixed());
1677         ASSERT(size.height().isFixed());
1678         width = size.width().calcValue(0);
1679         height = size.height().calcValue(0);
1680         break;
1681     }
1682     default:
1683         ASSERT_NOT_REACHED();
1684     }
1685     pageSize = IntSize(width, height);
1686 
1687     // The percentage is calculated with respect to the width even for margin top and bottom.
1688     // http://www.w3.org/TR/CSS2/box.html#margin-properties
1689     marginTop = style->marginTop().isAuto() ? marginTop : style->marginTop().calcValue(width);
1690     marginRight = style->marginRight().isAuto() ? marginRight : style->marginRight().calcValue(width);
1691     marginBottom = style->marginBottom().isAuto() ? marginBottom : style->marginBottom().calcValue(width);
1692     marginLeft = style->marginLeft().isAuto() ? marginLeft : style->marginLeft().calcValue(width);
1693 }
1694 
cssPrimitiveValueCache() const1695 PassRefPtr<CSSPrimitiveValueCache> Document::cssPrimitiveValueCache() const
1696 {
1697     if (!m_cssPrimitiveValueCache)
1698         m_cssPrimitiveValueCache = CSSPrimitiveValueCache::create();
1699     return m_cssPrimitiveValueCache;
1700 }
1701 
createStyleSelector()1702 void Document::createStyleSelector()
1703 {
1704     bool matchAuthorAndUserStyles = true;
1705     if (Settings* docSettings = settings())
1706         matchAuthorAndUserStyles = docSettings->authorAndUserStylesEnabled();
1707     m_styleSelector.set(new CSSStyleSelector(this, m_styleSheets.get(), m_mappedElementSheet.get(), pageUserSheet(), pageGroupUserSheets(),
1708                                              !inQuirksMode(), matchAuthorAndUserStyles));
1709     // 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).
1710     m_usesSiblingRules = m_usesSiblingRules || m_styleSelector->usesSiblingRules();
1711     m_usesFirstLineRules = m_usesFirstLineRules || m_styleSelector->usesFirstLineRules();
1712     m_usesBeforeAfterRules = m_usesBeforeAfterRules || m_styleSelector->usesBeforeAfterRules();
1713     m_usesLinkRules = m_usesLinkRules || m_styleSelector->usesLinkRules();
1714 }
1715 
attach()1716 void Document::attach()
1717 {
1718     ASSERT(!attached());
1719     ASSERT(!m_inPageCache);
1720 #if !PLATFORM(ANDROID)
1721     ASSERT(!m_axObjectCache);
1722 #endif
1723 
1724     if (!m_renderArena)
1725         m_renderArena = new RenderArena();
1726 
1727     // Create the rendering tree
1728     setRenderer(new (m_renderArena.get()) RenderView(this, view()));
1729 #if USE(ACCELERATED_COMPOSITING)
1730     renderView()->didMoveOnscreen();
1731 #endif
1732 
1733     recalcStyle(Force);
1734 
1735     RenderObject* render = renderer();
1736     setRenderer(0);
1737 
1738     TreeScope::attach();
1739 
1740     setRenderer(render);
1741 }
1742 
detach()1743 void Document::detach()
1744 {
1745     ASSERT(attached());
1746     ASSERT(!m_inPageCache);
1747 
1748     clearAXObjectCache();
1749     stopActiveDOMObjects();
1750     m_eventQueue->cancelQueuedEvents();
1751 
1752 #if ENABLE(REQUEST_ANIMATION_FRAME)
1753     // FIXME: consider using ActiveDOMObject.
1754     m_scriptedAnimationController = 0;
1755 #endif
1756 
1757     RenderObject* render = renderer();
1758 
1759     // Send out documentWillBecomeInactive() notifications to registered elements,
1760     // in order to stop media elements
1761     documentWillBecomeInactive();
1762 
1763 #if ENABLE(SHARED_WORKERS)
1764     SharedWorkerRepository::documentDetached(this);
1765 #endif
1766 
1767     if (m_frame) {
1768         FrameView* view = m_frame->view();
1769         if (view)
1770             view->detachCustomScrollbars();
1771     }
1772 
1773     // indicate destruction mode,  i.e. attached() but renderer == 0
1774     setRenderer(0);
1775 
1776 #if ENABLE(FULLSCREEN_API)
1777     if (m_fullScreenRenderer)
1778         setFullScreenRenderer(0);
1779 #endif
1780 
1781     m_hoverNode = 0;
1782     m_focusedNode = 0;
1783     m_activeNode = 0;
1784 
1785     TreeScope::detach();
1786 
1787     unscheduleStyleRecalc();
1788 
1789     if (render)
1790         render->destroy();
1791 
1792     // This is required, as our Frame might delete itself as soon as it detaches
1793     // us. However, this violates Node::detach() semantics, as it's never
1794     // possible to re-attach. Eventually Document::detach() should be renamed,
1795     // or this setting of the frame to 0 could be made explicit in each of the
1796     // callers of Document::detach().
1797     m_frame = 0;
1798     m_renderArena.clear();
1799 }
1800 
removeAllEventListeners()1801 void Document::removeAllEventListeners()
1802 {
1803 #if ENABLE(TOUCH_EVENTS)
1804     Page* ownerPage = page();
1805     if (!m_inPageCache && ownerPage && (m_frame == ownerPage->mainFrame()) && hasListenerType(Document::TOUCH_LISTENER)) {
1806         // Inform the Chrome Client that it no longer needs to forward touch
1807         // events to WebCore as the document removes all the event listeners.
1808         ownerPage->chrome()->client()->needTouchEvents(false);
1809     }
1810 #endif
1811 
1812     EventTarget::removeAllEventListeners();
1813 
1814     if (DOMWindow* domWindow = this->domWindow())
1815         domWindow->removeAllEventListeners();
1816     for (Node* node = firstChild(); node; node = node->traverseNextNode())
1817         node->removeAllEventListeners();
1818 }
1819 
renderView() const1820 RenderView* Document::renderView() const
1821 {
1822     return toRenderView(renderer());
1823 }
1824 
clearAXObjectCache()1825 void Document::clearAXObjectCache()
1826 {
1827 #if PLATFORM(ANDROID)
1828     return;
1829 #else
1830     // clear cache in top document
1831     if (m_axObjectCache) {
1832         // Clear the cache member variable before calling delete because attempts
1833         // are made to access it during destruction.
1834         AXObjectCache* axObjectCache = m_axObjectCache;
1835         m_axObjectCache = 0;
1836         delete axObjectCache;
1837         return;
1838     }
1839 
1840     // ask the top-level document to clear its cache
1841     Document* doc = topDocument();
1842     if (doc != this)
1843         doc->clearAXObjectCache();
1844 #endif
1845 }
1846 
axObjectCacheExists() const1847 bool Document::axObjectCacheExists() const
1848 {
1849 #if PLATFORM(ANDROID)
1850     return false;
1851 #else
1852     if (m_axObjectCache)
1853         return true;
1854 
1855     Document* doc = topDocument();
1856     if (doc != this)
1857         return doc->axObjectCacheExists();
1858 
1859     return false;
1860 #endif
1861 }
1862 
axObjectCache() const1863 AXObjectCache* Document::axObjectCache() const
1864 {
1865 #if PLATFORM(ANDROID)
1866     return 0;
1867 #else
1868     // The only document that actually has a AXObjectCache is the top-level
1869     // document.  This is because we need to be able to get from any WebCoreAXObject
1870     // to any other WebCoreAXObject on the same page.  Using a single cache allows
1871     // lookups across nested webareas (i.e. multiple documents).
1872 
1873     if (m_axObjectCache) {
1874         // return already known top-level cache
1875         if (!ownerElement())
1876             return m_axObjectCache;
1877 
1878         // In some pages with frames, the cache is created before the sub-webarea is
1879         // inserted into the tree.  Here, we catch that case and just toss the old
1880         // cache and start over.
1881         // NOTE: This recovery may no longer be needed. I have been unable to trigger
1882         // it again. See rdar://5794454
1883         // FIXME: Can this be fixed when inserting the subframe instead of now?
1884         // FIXME: If this function was called to get the cache in order to remove
1885         // an AXObject, we are now deleting the cache as a whole and returning a
1886         // new empty cache that does not contain the AXObject! That should actually
1887         // be OK. I am concerned about other cases like this where accessing the
1888         // cache blows away the AXObject being operated on.
1889         delete m_axObjectCache;
1890         m_axObjectCache = 0;
1891     }
1892 
1893     // ask the top-level document for its cache
1894     Document* doc = topDocument();
1895     if (doc != this)
1896         return doc->axObjectCache();
1897 
1898     // this is the top-level document, so install a new cache
1899     m_axObjectCache = new AXObjectCache(this);
1900     return m_axObjectCache;
1901 #endif // ANDROID
1902 }
1903 
setVisuallyOrdered()1904 void Document::setVisuallyOrdered()
1905 {
1906     m_visuallyOrdered = true;
1907     if (renderer())
1908         renderer()->style()->setVisuallyOrdered(true);
1909 }
1910 
createParser()1911 PassRefPtr<DocumentParser> Document::createParser()
1912 {
1913     // FIXME: this should probably pass the frame instead
1914     return XMLDocumentParser::create(this, view());
1915 }
1916 
scriptableDocumentParser() const1917 ScriptableDocumentParser* Document::scriptableDocumentParser() const
1918 {
1919     return parser() ? parser()->asScriptableDocumentParser() : 0;
1920 }
1921 
open(Document * ownerDocument)1922 void Document::open(Document* ownerDocument)
1923 {
1924     if (ownerDocument) {
1925         setURL(ownerDocument->url());
1926         m_cookieURL = ownerDocument->cookieURL();
1927         ScriptExecutionContext::setSecurityOrigin(ownerDocument->securityOrigin());
1928     }
1929 
1930     if (m_frame) {
1931         if (ScriptableDocumentParser* parser = scriptableDocumentParser()) {
1932             if (parser->isParsing()) {
1933                 // FIXME: HTML5 doesn't tell us to check this, it might not be correct.
1934                 if (parser->isExecutingScript())
1935                     return;
1936 
1937                 if (!parser->wasCreatedByScript() && parser->hasInsertionPoint())
1938                     return;
1939             }
1940         }
1941 
1942         if (m_frame->loader()->state() == FrameStateProvisional)
1943             m_frame->loader()->stopAllLoaders();
1944     }
1945 
1946     removeAllEventListeners();
1947     implicitOpen();
1948     if (ScriptableDocumentParser* parser = scriptableDocumentParser())
1949         parser->setWasCreatedByScript(true);
1950 
1951     if (DOMWindow* domWindow = this->domWindow())
1952         domWindow->removeAllEventListeners();
1953 
1954     if (m_frame)
1955         m_frame->loader()->didExplicitOpen();
1956 }
1957 
detachParser()1958 void Document::detachParser()
1959 {
1960     if (!m_parser)
1961         return;
1962     m_parser->detach();
1963     m_parser.clear();
1964 }
1965 
cancelParsing()1966 void Document::cancelParsing()
1967 {
1968     if (!m_parser)
1969         return;
1970 
1971     // We have to clear the parser to avoid possibly triggering
1972     // the onload handler when closing as a side effect of a cancel-style
1973     // change, such as opening a new document or closing the window while
1974     // still parsing
1975     detachParser();
1976     explicitClose();
1977 }
1978 
implicitOpen()1979 void Document::implicitOpen()
1980 {
1981     cancelParsing();
1982 
1983     removeChildren();
1984 
1985     setCompatibilityMode(NoQuirksMode);
1986 
1987     m_parser = createParser();
1988     setParsing(true);
1989     setReadyState(Loading);
1990 
1991     // If we reload, the animation controller sticks around and has
1992     // a stale animation time. We need to update it here.
1993     if (m_frame && m_frame->animation())
1994         m_frame->animation()->beginAnimationUpdate();
1995 }
1996 
body() const1997 HTMLElement* Document::body() const
1998 {
1999     Node* de = documentElement();
2000     if (!de)
2001         return 0;
2002 
2003     // try to prefer a FRAMESET element over BODY
2004     Node* body = 0;
2005     for (Node* i = de->firstChild(); i; i = i->nextSibling()) {
2006         if (i->hasTagName(framesetTag))
2007             return toHTMLElement(i);
2008 
2009         if (i->hasTagName(bodyTag) && !body)
2010             body = i;
2011     }
2012     return toHTMLElement(body);
2013 }
2014 
setBody(PassRefPtr<HTMLElement> newBody,ExceptionCode & ec)2015 void Document::setBody(PassRefPtr<HTMLElement> newBody, ExceptionCode& ec)
2016 {
2017     ec = 0;
2018 
2019     if (!newBody || !documentElement() || !newBody->hasTagName(bodyTag)) {
2020         ec = HIERARCHY_REQUEST_ERR;
2021         return;
2022     }
2023 
2024     if (newBody->document() && newBody->document() != this) {
2025         RefPtr<Node> node = importNode(newBody.get(), true, ec);
2026         if (ec)
2027             return;
2028 
2029         newBody = toHTMLElement(node.get());
2030     }
2031 
2032     HTMLElement* b = body();
2033     if (!b)
2034         documentElement()->appendChild(newBody, ec);
2035     else
2036         documentElement()->replaceChild(newBody, b, ec);
2037 }
2038 
head()2039 HTMLHeadElement* Document::head()
2040 {
2041     Node* de = documentElement();
2042     if (!de)
2043         return 0;
2044 
2045     for (Node* e = de->firstChild(); e; e = e->nextSibling())
2046         if (e->hasTagName(headTag))
2047             return static_cast<HTMLHeadElement*>(e);
2048 
2049     return 0;
2050 }
2051 
close()2052 void Document::close()
2053 {
2054     // FIXME: We should follow the specification more closely:
2055     //        http://www.whatwg.org/specs/web-apps/current-work/#dom-document-close
2056 
2057     if (!scriptableDocumentParser() || !scriptableDocumentParser()->wasCreatedByScript())
2058         return;
2059 
2060     explicitClose();
2061 }
2062 
explicitClose()2063 void Document::explicitClose()
2064 {
2065     if (!m_frame) {
2066         // Because we have no frame, we don't know if all loading has completed,
2067         // so we just call implicitClose() immediately. FIXME: This might fire
2068         // the load event prematurely <http://bugs.webkit.org/show_bug.cgi?id=14568>.
2069         if (m_parser)
2070             m_parser->finish();
2071         implicitClose();
2072         return;
2073     }
2074 
2075     // This code calls implicitClose() if all loading has completed.
2076     loader()->writer()->endIfNotLoadingMainResource();
2077     if (m_frame)
2078         m_frame->loader()->checkCompleted();
2079 }
2080 
implicitClose()2081 void Document::implicitClose()
2082 {
2083     // 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.
2084     if (m_inStyleRecalc) {
2085         m_closeAfterStyleRecalc = true;
2086         return;
2087     }
2088 
2089     bool wasLocationChangePending = frame() && frame()->navigationScheduler()->locationChangePending();
2090     bool doload = !parsing() && m_parser && !m_processingLoadEvent && !wasLocationChangePending;
2091 
2092     if (!doload)
2093         return;
2094 
2095     m_processingLoadEvent = true;
2096 
2097     ScriptableDocumentParser* parser = scriptableDocumentParser();
2098     m_wellFormed = parser && parser->wellFormed();
2099 
2100     // We have to clear the parser, in case someone document.write()s from the
2101     // onLoad event handler, as in Radar 3206524.
2102     detachParser();
2103 
2104     // Parser should have picked up all preloads by now
2105     m_cachedResourceLoader->clearPreloads();
2106 
2107     // FIXME: We kick off the icon loader when the Document is done parsing.
2108     // There are earlier opportunities we could start it:
2109     //  -When the <head> finishes parsing
2110     //  -When any new HTMLLinkElement is inserted into the document
2111     // But those add a dynamic component to the favicon that has UI
2112     // ramifications, and we need to decide what is the Right Thing To Do(tm)
2113     Frame* f = frame();
2114     if (f)
2115         f->loader()->startIconLoader();
2116 
2117     // Resume the animations (or start them)
2118     if (f)
2119         f->animation()->resumeAnimationsForDocument(this);
2120 
2121     ImageLoader::dispatchPendingBeforeLoadEvents();
2122     ImageLoader::dispatchPendingLoadEvents();
2123     dispatchWindowLoadEvent();
2124     enqueuePageshowEvent(PageshowEventNotPersisted);
2125     enqueuePopstateEvent(m_pendingStateObject ? m_pendingStateObject.release() : SerializedScriptValue::nullValue());
2126 
2127     if (f)
2128         f->loader()->handledOnloadEvents();
2129 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2130     if (!ownerElement())
2131         printf("onload fired at %d\n", elapsedTime());
2132 #endif
2133 
2134     m_processingLoadEvent = false;
2135 
2136     // An event handler may have removed the frame
2137     if (!frame())
2138         return;
2139 
2140     // Make sure both the initial layout and reflow happen after the onload
2141     // fires. This will improve onload scores, and other browsers do it.
2142     // If they wanna cheat, we can too. -dwh
2143 
2144     if (frame()->navigationScheduler()->locationChangePending() && elapsedTime() < cLayoutScheduleThreshold) {
2145         // Just bail out. Before or during the onload we were shifted to another page.
2146         // The old i-Bench suite does this. When this happens don't bother painting or laying out.
2147         view()->unscheduleRelayout();
2148         return;
2149     }
2150 
2151     frame()->loader()->checkCallImplicitClose();
2152     RenderObject* renderObject = renderer();
2153 
2154     // We used to force a synchronous display and flush here.  This really isn't
2155     // necessary and can in fact be actively harmful if pages are loading at a rate of > 60fps
2156     // (if your platform is syncing flushes and limiting them to 60fps).
2157     m_overMinimumLayoutThreshold = true;
2158     if (!ownerElement() || (ownerElement()->renderer() && !ownerElement()->renderer()->needsLayout())) {
2159         updateStyleIfNeeded();
2160 
2161         // Always do a layout after loading if needed.
2162         if (view() && renderObject && (!renderObject->firstChild() || renderObject->needsLayout()))
2163             view()->layout();
2164     }
2165 
2166 #if PLATFORM(MAC) || PLATFORM(CHROMIUM)
2167     if (f && renderObject && this == topDocument() && AXObjectCache::accessibilityEnabled()) {
2168         // The AX cache may have been cleared at this point, but we need to make sure it contains an
2169         // AX object to send the notification to. getOrCreate will make sure that an valid AX object
2170         // exists in the cache (we ignore the return value because we don't need it here). This is
2171         // only safe to call when a layout is not in progress, so it can not be used in postNotification.
2172         axObjectCache()->getOrCreate(renderObject);
2173         axObjectCache()->postNotification(renderObject, AXObjectCache::AXLoadComplete, true);
2174     }
2175 #endif
2176 
2177 #if ENABLE(SVG)
2178     // FIXME: Officially, time 0 is when the outermost <svg> receives its
2179     // SVGLoad event, but we don't implement those yet.  This is close enough
2180     // for now.  In some cases we should have fired earlier.
2181     if (svgExtensions())
2182         accessSVGExtensions()->startAnimations();
2183 #endif
2184 }
2185 
setParsing(bool b)2186 void Document::setParsing(bool b)
2187 {
2188     m_bParsing = b;
2189     if (!m_bParsing && view())
2190         view()->scheduleRelayout();
2191 
2192 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2193     if (!ownerElement() && !m_bParsing)
2194         printf("Parsing finished at %d\n", elapsedTime());
2195 #endif
2196 }
2197 
shouldScheduleLayout()2198 bool Document::shouldScheduleLayout()
2199 {
2200     // This function will only be called when FrameView thinks a layout is needed.
2201     // This enforces a couple extra rules.
2202     //
2203     //    (a) Only schedule a layout once the stylesheets are loaded.
2204     //    (b) Only schedule layout once we have a body element.
2205 
2206     return (haveStylesheetsLoaded() && body())
2207         || (documentElement() && !documentElement()->hasTagName(htmlTag));
2208 }
2209 
isLayoutTimerActive()2210 bool Document::isLayoutTimerActive()
2211 {
2212     if (!view() || !view()->layoutPending())
2213         return false;
2214     bool isPendingLayoutImmediate = minimumLayoutDelay() == m_extraLayoutDelay;
2215     return isPendingLayoutImmediate;
2216 }
2217 
minimumLayoutDelay()2218 int Document::minimumLayoutDelay()
2219 {
2220     if (m_overMinimumLayoutThreshold)
2221         return m_extraLayoutDelay;
2222 
2223     int elapsed = elapsedTime();
2224     m_overMinimumLayoutThreshold = elapsed > cLayoutScheduleThreshold;
2225 
2226     // We'll want to schedule the timer to fire at the minimum layout threshold.
2227     return max(0, cLayoutScheduleThreshold - elapsed) + m_extraLayoutDelay;
2228 }
2229 
elapsedTime() const2230 int Document::elapsedTime() const
2231 {
2232     return static_cast<int>((currentTime() - m_startTime) * 1000);
2233 }
2234 
write(const SegmentedString & text,Document * ownerDocument)2235 void Document::write(const SegmentedString& text, Document* ownerDocument)
2236 {
2237     NestingLevelIncrementer nestingLevelIncrementer(m_writeRecursionDepth);
2238 
2239     m_writeRecursionIsTooDeep = (m_writeRecursionDepth > 1) && m_writeRecursionIsTooDeep;
2240     m_writeRecursionIsTooDeep = (m_writeRecursionDepth > cMaxWriteRecursionDepth) || m_writeRecursionIsTooDeep;
2241 
2242     if (m_writeRecursionIsTooDeep)
2243        return;
2244 
2245 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2246     if (!ownerElement())
2247         printf("Beginning a document.write at %d\n", elapsedTime());
2248 #endif
2249 
2250     bool hasInsertionPoint = m_parser && m_parser->hasInsertionPoint();
2251     if (!hasInsertionPoint && m_ignoreDestructiveWriteCount)
2252         return;
2253 
2254     if (!hasInsertionPoint)
2255         open(ownerDocument);
2256 
2257     ASSERT(m_parser);
2258     m_parser->insert(text);
2259 
2260 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2261     if (!ownerElement())
2262         printf("Ending a document.write at %d\n", elapsedTime());
2263 #endif
2264 }
2265 
write(const String & text,Document * ownerDocument)2266 void Document::write(const String& text, Document* ownerDocument)
2267 {
2268     write(SegmentedString(text), ownerDocument);
2269 }
2270 
writeln(const String & text,Document * ownerDocument)2271 void Document::writeln(const String& text, Document* ownerDocument)
2272 {
2273     write(text, ownerDocument);
2274     write("\n", ownerDocument);
2275 }
2276 
finishParsing()2277 void Document::finishParsing()
2278 {
2279 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2280     if (!ownerElement())
2281         printf("Received all data at %d\n", elapsedTime());
2282 #endif
2283 
2284     // Let the parser go through as much data as it can.  There will be three possible outcomes after
2285     // finish() is called:
2286     // (1) All remaining data is parsed, document isn't loaded yet
2287     // (2) All remaining data is parsed, document is loaded, parser gets deleted
2288     // (3) Data is still remaining to be parsed.
2289     if (m_parser)
2290         m_parser->finish();
2291 }
2292 
virtualURL() const2293 const KURL& Document::virtualURL() const
2294 {
2295     return m_url;
2296 }
2297 
virtualCompleteURL(const String & url) const2298 KURL Document::virtualCompleteURL(const String& url) const
2299 {
2300     return completeURL(url);
2301 }
2302 
minimumTimerInterval() const2303 double Document::minimumTimerInterval() const
2304 {
2305     Page* p = page();
2306     if (!p)
2307         return ScriptExecutionContext::minimumTimerInterval();
2308     return p->settings()->minDOMTimerInterval();
2309 }
2310 
errorEventTarget()2311 EventTarget* Document::errorEventTarget()
2312 {
2313     return domWindow();
2314 }
2315 
logExceptionToConsole(const String & errorMessage,int lineNumber,const String & sourceURL,PassRefPtr<ScriptCallStack> callStack)2316 void Document::logExceptionToConsole(const String& errorMessage, int lineNumber, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack)
2317 {
2318     MessageType messageType = callStack ? UncaughtExceptionMessageType : LogMessageType;
2319     addMessage(JSMessageSource, messageType, ErrorMessageLevel, errorMessage, lineNumber, sourceURL, callStack);
2320 }
2321 
setURL(const KURL & url)2322 void Document::setURL(const KURL& url)
2323 {
2324     const KURL& newURL = url.isEmpty() ? blankURL() : url;
2325     if (newURL == m_url)
2326         return;
2327 
2328     m_url = newURL;
2329     m_documentURI = m_url.string();
2330     updateBaseURL();
2331 }
2332 
updateBaseURL()2333 void Document::updateBaseURL()
2334 {
2335     // DOM 3 Core: When the Document supports the feature "HTML" [DOM Level 2 HTML], the base URI is computed using
2336     // first the value of the href attribute of the HTML BASE element if any, and the value of the documentURI attribute
2337     // from the Document interface otherwise.
2338     if (m_baseElementURL.isEmpty()) {
2339         // The documentURI attribute is an arbitrary string. DOM 3 Core does not specify how it should be resolved,
2340         // so we use a null base URL.
2341         m_baseURL = KURL(KURL(), documentURI());
2342     } else
2343         m_baseURL = m_baseElementURL;
2344     if (!m_baseURL.isValid())
2345         m_baseURL = KURL();
2346 
2347     if (m_elemSheet)
2348         m_elemSheet->setFinalURL(m_baseURL);
2349     if (m_mappedElementSheet)
2350         m_mappedElementSheet->setFinalURL(m_baseURL);
2351 }
2352 
processBaseElement()2353 void Document::processBaseElement()
2354 {
2355     // Find the first href attribute in a base element and the first target attribute in a base element.
2356     const AtomicString* href = 0;
2357     const AtomicString* target = 0;
2358     for (Node* node = document()->firstChild(); node && (!href || !target); node = node->traverseNextNode()) {
2359         if (node->hasTagName(baseTag)) {
2360             if (!href) {
2361                 const AtomicString& value = static_cast<Element*>(node)->fastGetAttribute(hrefAttr);
2362                 if (!value.isNull())
2363                     href = &value;
2364             }
2365             if (!target) {
2366                 const AtomicString& value = static_cast<Element*>(node)->fastGetAttribute(targetAttr);
2367                 if (!value.isNull())
2368                     target = &value;
2369             }
2370         }
2371     }
2372 
2373     // FIXME: Since this doesn't share code with completeURL it may not handle encodings correctly.
2374     KURL baseElementURL;
2375     if (href) {
2376         String strippedHref = stripLeadingAndTrailingHTMLSpaces(*href);
2377         if (!strippedHref.isEmpty())
2378             baseElementURL = KURL(url(), strippedHref);
2379     }
2380     if (m_baseElementURL != baseElementURL) {
2381         m_baseElementURL = baseElementURL;
2382         updateBaseURL();
2383     }
2384 
2385     m_baseTarget = target ? *target : nullAtom;
2386 }
2387 
userAgent(const KURL & url) const2388 String Document::userAgent(const KURL& url) const
2389 {
2390     return frame() ? frame()->loader()->userAgent(url) : String();
2391 }
2392 
pageUserSheet()2393 CSSStyleSheet* Document::pageUserSheet()
2394 {
2395     if (m_pageUserSheet)
2396         return m_pageUserSheet.get();
2397 
2398     Page* owningPage = page();
2399     if (!owningPage)
2400         return 0;
2401 
2402     String userSheetText = owningPage->userStyleSheet();
2403     if (userSheetText.isEmpty())
2404         return 0;
2405 
2406     // Parse the sheet and cache it.
2407     m_pageUserSheet = CSSStyleSheet::createInline(this, settings()->userStyleSheetLocation());
2408     m_pageUserSheet->setIsUserStyleSheet(true);
2409     m_pageUserSheet->parseString(userSheetText, !inQuirksMode());
2410     return m_pageUserSheet.get();
2411 }
2412 
clearPageUserSheet()2413 void Document::clearPageUserSheet()
2414 {
2415     if (m_pageUserSheet) {
2416         m_pageUserSheet = 0;
2417         styleSelectorChanged(DeferRecalcStyle);
2418     }
2419 }
2420 
updatePageUserSheet()2421 void Document::updatePageUserSheet()
2422 {
2423     clearPageUserSheet();
2424     if (pageUserSheet())
2425         styleSelectorChanged(RecalcStyleImmediately);
2426 }
2427 
pageGroupUserSheets() const2428 const Vector<RefPtr<CSSStyleSheet> >* Document::pageGroupUserSheets() const
2429 {
2430     if (m_pageGroupUserSheetCacheValid)
2431         return m_pageGroupUserSheets.get();
2432 
2433     m_pageGroupUserSheetCacheValid = true;
2434 
2435     Page* owningPage = page();
2436     if (!owningPage)
2437         return 0;
2438 
2439     const PageGroup& pageGroup = owningPage->group();
2440     const UserStyleSheetMap* sheetsMap = pageGroup.userStyleSheets();
2441     if (!sheetsMap)
2442         return 0;
2443 
2444     UserStyleSheetMap::const_iterator end = sheetsMap->end();
2445     for (UserStyleSheetMap::const_iterator it = sheetsMap->begin(); it != end; ++it) {
2446         const UserStyleSheetVector* sheets = it->second;
2447         for (unsigned i = 0; i < sheets->size(); ++i) {
2448             const UserStyleSheet* sheet = sheets->at(i).get();
2449             if (sheet->injectedFrames() == InjectInTopFrameOnly && ownerElement())
2450                 continue;
2451             if (!UserContentURLPattern::matchesPatterns(url(), sheet->whitelist(), sheet->blacklist()))
2452                 continue;
2453             RefPtr<CSSStyleSheet> parsedSheet = CSSStyleSheet::createInline(const_cast<Document*>(this), sheet->url());
2454             parsedSheet->setIsUserStyleSheet(sheet->level() == UserStyleUserLevel);
2455             parsedSheet->parseString(sheet->source(), !inQuirksMode());
2456             if (!m_pageGroupUserSheets)
2457                 m_pageGroupUserSheets.set(new Vector<RefPtr<CSSStyleSheet> >);
2458             m_pageGroupUserSheets->append(parsedSheet.release());
2459         }
2460     }
2461 
2462     return m_pageGroupUserSheets.get();
2463 }
2464 
clearPageGroupUserSheets()2465 void Document::clearPageGroupUserSheets()
2466 {
2467     m_pageGroupUserSheetCacheValid = false;
2468     if (m_pageGroupUserSheets && m_pageGroupUserSheets->size()) {
2469         m_pageGroupUserSheets->clear();
2470         styleSelectorChanged(DeferRecalcStyle);
2471     }
2472 }
2473 
updatePageGroupUserSheets()2474 void Document::updatePageGroupUserSheets()
2475 {
2476     clearPageGroupUserSheets();
2477     if (pageGroupUserSheets() && pageGroupUserSheets()->size())
2478         styleSelectorChanged(RecalcStyleImmediately);
2479 }
2480 
elementSheet()2481 CSSStyleSheet* Document::elementSheet()
2482 {
2483     if (!m_elemSheet)
2484         m_elemSheet = CSSStyleSheet::createInline(this, m_baseURL);
2485     return m_elemSheet.get();
2486 }
2487 
mappedElementSheet()2488 CSSStyleSheet* Document::mappedElementSheet()
2489 {
2490     if (!m_mappedElementSheet)
2491         m_mappedElementSheet = CSSStyleSheet::createInline(this, m_baseURL);
2492     return m_mappedElementSheet.get();
2493 }
2494 
nextNodeWithExactTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2495 static Node* nextNodeWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2496 {
2497     // Search is inclusive of start
2498     for (Node* n = start; n; n = n->traverseNextNode())
2499         if (n->isKeyboardFocusable(event) && n->tabIndex() == tabIndex)
2500             return n;
2501 
2502     return 0;
2503 }
2504 
previousNodeWithExactTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2505 static Node* previousNodeWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2506 {
2507     // Search is inclusive of start
2508     for (Node* n = start; n; n = n->traversePreviousNode())
2509         if (n->isKeyboardFocusable(event) && n->tabIndex() == tabIndex)
2510             return n;
2511 
2512     return 0;
2513 }
2514 
nextNodeWithGreaterTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2515 static Node* nextNodeWithGreaterTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2516 {
2517     // Search is inclusive of start
2518     int winningTabIndex = SHRT_MAX + 1;
2519     Node* winner = 0;
2520     for (Node* n = start; n; n = n->traverseNextNode())
2521         if (n->isKeyboardFocusable(event) && n->tabIndex() > tabIndex && n->tabIndex() < winningTabIndex) {
2522             winner = n;
2523             winningTabIndex = n->tabIndex();
2524         }
2525 
2526     return winner;
2527 }
2528 
previousNodeWithLowerTabIndex(Node * start,int tabIndex,KeyboardEvent * event)2529 static Node* previousNodeWithLowerTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
2530 {
2531     // Search is inclusive of start
2532     int winningTabIndex = 0;
2533     Node* winner = 0;
2534     for (Node* n = start; n; n = n->traversePreviousNode())
2535         if (n->isKeyboardFocusable(event) && n->tabIndex() < tabIndex && n->tabIndex() > winningTabIndex) {
2536             winner = n;
2537             winningTabIndex = n->tabIndex();
2538         }
2539 
2540     return winner;
2541 }
2542 
nextFocusableNode(Node * start,KeyboardEvent * event)2543 Node* Document::nextFocusableNode(Node* start, KeyboardEvent* event)
2544 {
2545     if (start) {
2546         // If a node is excluded from the normal tabbing cycle, the next focusable node is determined by tree order
2547         if (start->tabIndex() < 0) {
2548             for (Node* n = start->traverseNextNode(); n; n = n->traverseNextNode())
2549                 if (n->isKeyboardFocusable(event) && n->tabIndex() >= 0)
2550                     return n;
2551         }
2552 
2553         // First try to find a node with the same tabindex as start that comes after start in the document.
2554         if (Node* winner = nextNodeWithExactTabIndex(start->traverseNextNode(), start->tabIndex(), event))
2555             return winner;
2556 
2557         if (!start->tabIndex())
2558             // We've reached the last node in the document with a tabindex of 0. This is the end of the tabbing order.
2559             return 0;
2560     }
2561 
2562     // Look for the first node in the document that:
2563     // 1) has the lowest tabindex that is higher than start's tabindex (or 0, if start is null), and
2564     // 2) comes first in the document, if there's a tie.
2565     if (Node* winner = nextNodeWithGreaterTabIndex(this, start ? start->tabIndex() : 0, event))
2566         return winner;
2567 
2568     // There are no nodes with a tabindex greater than start's tabindex,
2569     // so find the first node with a tabindex of 0.
2570     return nextNodeWithExactTabIndex(this, 0, event);
2571 }
2572 
previousFocusableNode(Node * start,KeyboardEvent * event)2573 Node* Document::previousFocusableNode(Node* start, KeyboardEvent* event)
2574 {
2575     Node* last;
2576     for (last = this; last->lastChild(); last = last->lastChild()) { }
2577 
2578     // First try to find the last node in the document that comes before start and has the same tabindex as start.
2579     // If start is null, find the last node in the document with a tabindex of 0.
2580     Node* startingNode;
2581     int startingTabIndex;
2582     if (start) {
2583         startingNode = start->traversePreviousNode();
2584         startingTabIndex = start->tabIndex();
2585     } else {
2586         startingNode = last;
2587         startingTabIndex = 0;
2588     }
2589 
2590     // However, if a node is excluded from the normal tabbing cycle, the previous focusable node is determined by tree order
2591     if (startingTabIndex < 0) {
2592         for (Node* n = startingNode; n; n = n->traversePreviousNode())
2593             if (n->isKeyboardFocusable(event) && n->tabIndex() >= 0)
2594                 return n;
2595     }
2596 
2597     if (Node* winner = previousNodeWithExactTabIndex(startingNode, startingTabIndex, event))
2598         return winner;
2599 
2600     // There are no nodes before start with the same tabindex as start, so look for a node that:
2601     // 1) has the highest non-zero tabindex (that is less than start's tabindex), and
2602     // 2) comes last in the document, if there's a tie.
2603     startingTabIndex = (start && start->tabIndex()) ? start->tabIndex() : SHRT_MAX;
2604     return previousNodeWithLowerTabIndex(last, startingTabIndex, event);
2605 }
2606 
nodeAbsIndex(Node * node)2607 int Document::nodeAbsIndex(Node *node)
2608 {
2609     ASSERT(node->document() == this);
2610 
2611     int absIndex = 0;
2612     for (Node* n = node; n && n != this; n = n->traversePreviousNode())
2613         absIndex++;
2614     return absIndex;
2615 }
2616 
nodeWithAbsIndex(int absIndex)2617 Node* Document::nodeWithAbsIndex(int absIndex)
2618 {
2619     Node* n = this;
2620     for (int i = 0; n && (i < absIndex); i++)
2621         n = n->traverseNextNode();
2622     return n;
2623 }
2624 
2625 #ifdef ANDROID_META_SUPPORT
processMetadataSettings(const String & content)2626 void Document::processMetadataSettings(const String& content)
2627 {
2628     ASSERT(!content.isNull());
2629     processArguments(content, 0, 0);
2630 }
2631 #endif
2632 
processHttpEquiv(const String & equiv,const String & content)2633 void Document::processHttpEquiv(const String& equiv, const String& content)
2634 {
2635     ASSERT(!equiv.isNull() && !content.isNull());
2636 
2637     Frame* frame = this->frame();
2638 
2639     if (equalIgnoringCase(equiv, "default-style")) {
2640         // The preferred style set has been overridden as per section
2641         // 14.3.2 of the HTML4.0 specification.  We need to update the
2642         // sheet used variable and then update our style selector.
2643         // For more info, see the test at:
2644         // http://www.hixie.ch/tests/evil/css/import/main/preferred.html
2645         // -dwh
2646         m_selectedStylesheetSet = content;
2647         m_preferredStylesheetSet = content;
2648         styleSelectorChanged(DeferRecalcStyle);
2649     } else if (equalIgnoringCase(equiv, "refresh")) {
2650         double delay;
2651         String url;
2652         if (frame && parseHTTPRefresh(content, true, delay, url)) {
2653             if (url.isEmpty())
2654                 url = m_url.string();
2655             else
2656                 url = completeURL(url).string();
2657             frame->navigationScheduler()->scheduleRedirect(delay, url);
2658         }
2659     } else if (equalIgnoringCase(equiv, "set-cookie")) {
2660         // FIXME: make setCookie work on XML documents too; e.g. in case of <html:meta .....>
2661         if (isHTMLDocument()) {
2662             ExceptionCode ec; // Exception (for sandboxed documents) ignored.
2663             static_cast<HTMLDocument*>(this)->setCookie(content, ec);
2664         }
2665     } else if (equalIgnoringCase(equiv, "content-language"))
2666         setContentLanguage(content);
2667     else if (equalIgnoringCase(equiv, "x-dns-prefetch-control"))
2668         parseDNSPrefetchControlHeader(content);
2669     else if (equalIgnoringCase(equiv, "x-frame-options")) {
2670         if (frame) {
2671             FrameLoader* frameLoader = frame->loader();
2672             if (frameLoader->shouldInterruptLoadForXFrameOptions(content, url())) {
2673                 frameLoader->stopAllLoaders();
2674                 frame->navigationScheduler()->scheduleLocationChange(securityOrigin(), blankURL(), String());
2675 
2676                 DEFINE_STATIC_LOCAL(String, consoleMessage, ("Refused to display document because display forbidden by X-Frame-Options.\n"));
2677                 frame->domWindow()->console()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, consoleMessage, 1, String());
2678             }
2679         }
2680     } else if (equalIgnoringCase(equiv, "x-webkit-csp"))
2681         contentSecurityPolicy()->didReceiveHeader(content);
2682 }
2683 
2684 // Though isspace() considers \t and \v to be whitespace, Win IE doesn't.
isSeparator(UChar c)2685 static bool isSeparator(UChar c)
2686 {
2687     return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '=' || c == ',' || c == '\0';
2688 }
2689 
processArguments(const String & features,void * data,ArgumentsCallback callback)2690 void Document::processArguments(const String& features, void* data, ArgumentsCallback callback)
2691 {
2692     // Tread lightly in this code -- it was specifically designed to mimic Win IE's parsing behavior.
2693     int keyBegin, keyEnd;
2694     int valueBegin, valueEnd;
2695 
2696     int i = 0;
2697     int length = features.length();
2698     String buffer = features.lower();
2699     while (i < length) {
2700         // skip to first non-separator, but don't skip past the end of the string
2701         while (isSeparator(buffer[i])) {
2702             if (i >= length)
2703                 break;
2704             i++;
2705         }
2706         keyBegin = i;
2707 
2708         // skip to first separator
2709         while (!isSeparator(buffer[i]))
2710             i++;
2711         keyEnd = i;
2712 
2713         // skip to first '=', but don't skip past a ',' or the end of the string
2714         while (buffer[i] != '=') {
2715             if (buffer[i] == ',' || i >= length)
2716                 break;
2717             i++;
2718         }
2719 
2720         // skip to first non-separator, but don't skip past a ',' or the end of the string
2721         while (isSeparator(buffer[i])) {
2722             if (buffer[i] == ',' || i >= length)
2723                 break;
2724             i++;
2725         }
2726         valueBegin = i;
2727 
2728         // skip to first separator
2729         while (!isSeparator(buffer[i]))
2730             i++;
2731         valueEnd = i;
2732 
2733         ASSERT(i <= length);
2734 
2735         String keyString = buffer.substring(keyBegin, keyEnd - keyBegin);
2736         String valueString = buffer.substring(valueBegin, valueEnd - valueBegin);
2737 #ifdef ANDROID_META_SUPPORT
2738         if (frame())
2739             frame()->settings()->setMetadataSettings(keyString, valueString);
2740         if (callback && data)
2741 #endif
2742             callback(keyString, valueString, this, data);
2743     }
2744 }
2745 
processViewport(const String & features)2746 void Document::processViewport(const String& features)
2747 {
2748     ASSERT(!features.isNull());
2749 
2750     m_viewportArguments = ViewportArguments();
2751     processArguments(features, (void*)&m_viewportArguments, &setViewportFeature);
2752 
2753     Frame* frame = this->frame();
2754     if (!frame || !frame->page())
2755         return;
2756 
2757     frame->page()->updateViewportArguments();
2758 }
2759 
prepareMouseEvent(const HitTestRequest & request,const IntPoint & documentPoint,const PlatformMouseEvent & event)2760 MouseEventWithHitTestResults Document::prepareMouseEvent(const HitTestRequest& request, const IntPoint& documentPoint, const PlatformMouseEvent& event)
2761 {
2762     ASSERT(!renderer() || renderer()->isRenderView());
2763 
2764     if (!renderer())
2765         return MouseEventWithHitTestResults(event, HitTestResult(IntPoint()));
2766 
2767     HitTestResult result(documentPoint);
2768     renderView()->layer()->hitTest(request, result);
2769 
2770     if (!request.readOnly())
2771         updateStyleIfNeeded();
2772 
2773     return MouseEventWithHitTestResults(event, result);
2774 }
2775 
2776 // DOM Section 1.1.1
childTypeAllowed(NodeType type) const2777 bool Document::childTypeAllowed(NodeType type) const
2778 {
2779     switch (type) {
2780     case ATTRIBUTE_NODE:
2781     case CDATA_SECTION_NODE:
2782     case DOCUMENT_FRAGMENT_NODE:
2783     case DOCUMENT_NODE:
2784     case ENTITY_NODE:
2785     case ENTITY_REFERENCE_NODE:
2786     case NOTATION_NODE:
2787     case TEXT_NODE:
2788     case XPATH_NAMESPACE_NODE:
2789         return false;
2790     case COMMENT_NODE:
2791     case PROCESSING_INSTRUCTION_NODE:
2792         return true;
2793     case DOCUMENT_TYPE_NODE:
2794     case ELEMENT_NODE:
2795         // Documents may contain no more than one of each of these.
2796         // (One Element and one DocumentType.)
2797         for (Node* c = firstChild(); c; c = c->nextSibling())
2798             if (c->nodeType() == type)
2799                 return false;
2800         return true;
2801     }
2802     return false;
2803 }
2804 
canReplaceChild(Node * newChild,Node * oldChild)2805 bool Document::canReplaceChild(Node* newChild, Node* oldChild)
2806 {
2807     if (!oldChild)
2808         // ContainerNode::replaceChild will raise a NOT_FOUND_ERR.
2809         return true;
2810 
2811     if (oldChild->nodeType() == newChild->nodeType())
2812         return true;
2813 
2814     int numDoctypes = 0;
2815     int numElements = 0;
2816 
2817     // First, check how many doctypes and elements we have, not counting
2818     // the child we're about to remove.
2819     for (Node* c = firstChild(); c; c = c->nextSibling()) {
2820         if (c == oldChild)
2821             continue;
2822 
2823         switch (c->nodeType()) {
2824         case DOCUMENT_TYPE_NODE:
2825             numDoctypes++;
2826             break;
2827         case ELEMENT_NODE:
2828             numElements++;
2829             break;
2830         default:
2831             break;
2832         }
2833     }
2834 
2835     // Then, see how many doctypes and elements might be added by the new child.
2836     if (newChild->nodeType() == DOCUMENT_FRAGMENT_NODE) {
2837         for (Node* c = firstChild(); c; c = c->nextSibling()) {
2838             switch (c->nodeType()) {
2839             case ATTRIBUTE_NODE:
2840             case CDATA_SECTION_NODE:
2841             case DOCUMENT_FRAGMENT_NODE:
2842             case DOCUMENT_NODE:
2843             case ENTITY_NODE:
2844             case ENTITY_REFERENCE_NODE:
2845             case NOTATION_NODE:
2846             case TEXT_NODE:
2847             case XPATH_NAMESPACE_NODE:
2848                 return false;
2849             case COMMENT_NODE:
2850             case PROCESSING_INSTRUCTION_NODE:
2851                 break;
2852             case DOCUMENT_TYPE_NODE:
2853                 numDoctypes++;
2854                 break;
2855             case ELEMENT_NODE:
2856                 numElements++;
2857                 break;
2858             }
2859         }
2860     } else {
2861         switch (newChild->nodeType()) {
2862         case ATTRIBUTE_NODE:
2863         case CDATA_SECTION_NODE:
2864         case DOCUMENT_FRAGMENT_NODE:
2865         case DOCUMENT_NODE:
2866         case ENTITY_NODE:
2867         case ENTITY_REFERENCE_NODE:
2868         case NOTATION_NODE:
2869         case TEXT_NODE:
2870         case XPATH_NAMESPACE_NODE:
2871             return false;
2872         case COMMENT_NODE:
2873         case PROCESSING_INSTRUCTION_NODE:
2874             return true;
2875         case DOCUMENT_TYPE_NODE:
2876             numDoctypes++;
2877             break;
2878         case ELEMENT_NODE:
2879             numElements++;
2880             break;
2881         }
2882     }
2883 
2884     if (numElements > 1 || numDoctypes > 1)
2885         return false;
2886 
2887     return true;
2888 }
2889 
cloneNode(bool)2890 PassRefPtr<Node> Document::cloneNode(bool /*deep*/)
2891 {
2892     // Spec says cloning Document nodes is "implementation dependent"
2893     // so we do not support it...
2894     return 0;
2895 }
2896 
styleSheets()2897 StyleSheetList* Document::styleSheets()
2898 {
2899     return m_styleSheets.get();
2900 }
2901 
preferredStylesheetSet() const2902 String Document::preferredStylesheetSet() const
2903 {
2904     return m_preferredStylesheetSet;
2905 }
2906 
selectedStylesheetSet() const2907 String Document::selectedStylesheetSet() const
2908 {
2909     return m_selectedStylesheetSet;
2910 }
2911 
setSelectedStylesheetSet(const String & aString)2912 void Document::setSelectedStylesheetSet(const String& aString)
2913 {
2914     m_selectedStylesheetSet = aString;
2915     styleSelectorChanged(DeferRecalcStyle);
2916 }
2917 
2918 // This method is called whenever a top-level stylesheet has finished loading.
removePendingSheet()2919 void Document::removePendingSheet()
2920 {
2921     // Make sure we knew this sheet was pending, and that our count isn't out of sync.
2922     ASSERT(m_pendingStylesheets > 0);
2923 
2924     m_pendingStylesheets--;
2925 
2926 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2927     if (!ownerElement())
2928         printf("Stylesheet loaded at time %d. %d stylesheets still remain.\n", elapsedTime(), m_pendingStylesheets);
2929 #endif
2930 
2931     if (m_pendingStylesheets)
2932         return;
2933 
2934     styleSelectorChanged(RecalcStyleImmediately);
2935 
2936     if (ScriptableDocumentParser* parser = scriptableDocumentParser())
2937         parser->executeScriptsWaitingForStylesheets();
2938 
2939     if (m_gotoAnchorNeededAfterStylesheetsLoad && view())
2940         view()->scrollToFragment(m_url);
2941 }
2942 
styleSelectorChanged(StyleSelectorUpdateFlag updateFlag)2943 void Document::styleSelectorChanged(StyleSelectorUpdateFlag updateFlag)
2944 {
2945     // Don't bother updating, since we haven't loaded all our style info yet
2946     // and haven't calculated the style selector for the first time.
2947     if (!attached() || (!m_didCalculateStyleSelector && !haveStylesheetsLoaded()))
2948         return;
2949 
2950 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2951     if (!ownerElement())
2952         printf("Beginning update of style selector at time %d.\n", elapsedTime());
2953 #endif
2954 
2955     recalcStyleSelector();
2956 
2957     if (updateFlag == DeferRecalcStyle) {
2958         scheduleForcedStyleRecalc();
2959         return;
2960     }
2961 
2962     if (didLayoutWithPendingStylesheets() && m_pendingStylesheets <= 0) {
2963         m_pendingSheetLayout = IgnoreLayoutWithPendingSheets;
2964         if (renderer())
2965             renderer()->repaint();
2966     }
2967 
2968     // This recalcStyle initiates a new recalc cycle. We need to bracket it to
2969     // make sure animations get the correct update time
2970     if (m_frame)
2971         m_frame->animation()->beginAnimationUpdate();
2972     recalcStyle(Force);
2973     if (m_frame)
2974         m_frame->animation()->endAnimationUpdate();
2975 
2976 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
2977     if (!ownerElement())
2978         printf("Finished update of style selector at time %d\n", elapsedTime());
2979 #endif
2980 
2981     if (renderer()) {
2982         renderer()->setNeedsLayoutAndPrefWidthsRecalc();
2983         if (view())
2984             view()->scheduleRelayout();
2985     }
2986 
2987     if (m_mediaQueryMatcher)
2988         m_mediaQueryMatcher->styleSelectorChanged();
2989 }
2990 
addStyleSheetCandidateNode(Node * node,bool createdByParser)2991 void Document::addStyleSheetCandidateNode(Node* node, bool createdByParser)
2992 {
2993     if (!node->inDocument())
2994         return;
2995 
2996     // Until the <body> exists, we have no choice but to compare document positions,
2997     // since styles outside of the body and head continue to be shunted into the head
2998     // (and thus can shift to end up before dynamically added DOM content that is also
2999     // outside the body).
3000     if ((createdByParser && body()) || m_styleSheetCandidateNodes.isEmpty()) {
3001         m_styleSheetCandidateNodes.add(node);
3002         return;
3003     }
3004 
3005     // Determine an appropriate insertion point.
3006     StyleSheetCandidateListHashSet::iterator begin = m_styleSheetCandidateNodes.begin();
3007     StyleSheetCandidateListHashSet::iterator end = m_styleSheetCandidateNodes.end();
3008     StyleSheetCandidateListHashSet::iterator it = end;
3009     Node* followingNode = 0;
3010     do {
3011         --it;
3012         Node* n = *it;
3013         unsigned short position = n->compareDocumentPosition(node);
3014         if (position == DOCUMENT_POSITION_FOLLOWING) {
3015             m_styleSheetCandidateNodes.insertBefore(followingNode, node);
3016             return;
3017         }
3018         followingNode = n;
3019     } while (it != begin);
3020 
3021     m_styleSheetCandidateNodes.insertBefore(followingNode, node);
3022 }
3023 
removeStyleSheetCandidateNode(Node * node)3024 void Document::removeStyleSheetCandidateNode(Node* node)
3025 {
3026     m_styleSheetCandidateNodes.remove(node);
3027 }
3028 
recalcStyleSelector()3029 void Document::recalcStyleSelector()
3030 {
3031     if (m_inStyleRecalc) {
3032         // SVG <use> element may manage to invalidate style selector in the middle of a style recalc.
3033         // https://bugs.webkit.org/show_bug.cgi?id=54344
3034         // FIXME: This should be fixed in SVG and this code replaced with ASSERT(!m_inStyleRecalc).
3035         m_hasDirtyStyleSelector = true;
3036         scheduleForcedStyleRecalc();
3037         return;
3038     }
3039     if (!renderer() || !attached())
3040         return;
3041 
3042     StyleSheetVector sheets;
3043 
3044     bool matchAuthorAndUserStyles = true;
3045     if (Settings* settings = this->settings())
3046         matchAuthorAndUserStyles = settings->authorAndUserStylesEnabled();
3047 
3048     StyleSheetCandidateListHashSet::iterator begin = m_styleSheetCandidateNodes.begin();
3049     StyleSheetCandidateListHashSet::iterator end = m_styleSheetCandidateNodes.end();
3050     if (!matchAuthorAndUserStyles)
3051         end = begin;
3052     for (StyleSheetCandidateListHashSet::iterator it = begin; it != end; ++it) {
3053         Node* n = *it;
3054 
3055         StyleSheet* sheet = 0;
3056 
3057         if (n->nodeType() == PROCESSING_INSTRUCTION_NODE) {
3058             // Processing instruction (XML documents only).
3059             // We don't support linking to embedded CSS stylesheets, see <https://bugs.webkit.org/show_bug.cgi?id=49281> for discussion.
3060             ProcessingInstruction* pi = static_cast<ProcessingInstruction*>(n);
3061             sheet = pi->sheet();
3062 #if ENABLE(XSLT)
3063             // Don't apply XSL transforms to already transformed documents -- <rdar://problem/4132806>
3064             if (pi->isXSL() && !transformSourceDocument()) {
3065                 // Don't apply XSL transforms until loading is finished.
3066                 if (!parsing())
3067                     applyXSLTransform(pi);
3068                 return;
3069             }
3070 #endif
3071         } else if ((n->isHTMLElement() && (n->hasTagName(linkTag) || n->hasTagName(styleTag)))
3072 #if ENABLE(SVG)
3073             ||  (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))
3074 #endif
3075         ) {
3076             Element* e = static_cast<Element*>(n);
3077             AtomicString title = e->getAttribute(titleAttr);
3078             bool enabledViaScript = false;
3079             if (e->hasLocalName(linkTag)) {
3080                 // <LINK> element
3081                 HTMLLinkElement* linkElement = static_cast<HTMLLinkElement*>(n);
3082                 if (linkElement->isDisabled())
3083                     continue;
3084                 enabledViaScript = linkElement->isEnabledViaScript();
3085                 if (linkElement->isLoading()) {
3086                     // it is loading but we should still decide which style sheet set to use
3087                     if (!enabledViaScript && !title.isEmpty() && m_preferredStylesheetSet.isEmpty()) {
3088                         const AtomicString& rel = e->getAttribute(relAttr);
3089                         if (!rel.contains("alternate")) {
3090                             m_preferredStylesheetSet = title;
3091                             m_selectedStylesheetSet = title;
3092                         }
3093                     }
3094                     continue;
3095                 }
3096                 if (!linkElement->sheet())
3097                     title = nullAtom;
3098             }
3099 
3100             // Get the current preferred styleset.  This is the
3101             // set of sheets that will be enabled.
3102 #if ENABLE(SVG)
3103             if (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))
3104                 sheet = static_cast<SVGStyleElement*>(n)->sheet();
3105             else
3106 #endif
3107             if (e->hasLocalName(linkTag))
3108                 sheet = static_cast<HTMLLinkElement*>(n)->sheet();
3109             else
3110                 // <STYLE> element
3111                 sheet = static_cast<HTMLStyleElement*>(n)->sheet();
3112 
3113             // Check to see if this sheet belongs to a styleset
3114             // (thus making it PREFERRED or ALTERNATE rather than
3115             // PERSISTENT).
3116             if (!enabledViaScript && !title.isEmpty()) {
3117                 // Yes, we have a title.
3118                 if (m_preferredStylesheetSet.isEmpty()) {
3119                     // No preferred set has been established.  If
3120                     // we are NOT an alternate sheet, then establish
3121                     // us as the preferred set.  Otherwise, just ignore
3122                     // this sheet.
3123                     AtomicString rel = e->getAttribute(relAttr);
3124                     if (e->hasLocalName(styleTag) || !rel.contains("alternate"))
3125                         m_preferredStylesheetSet = m_selectedStylesheetSet = title;
3126                 }
3127 
3128                 if (title != m_preferredStylesheetSet)
3129                     sheet = 0;
3130             }
3131         }
3132 
3133         if (sheet)
3134             sheets.append(sheet);
3135     }
3136 
3137     m_styleSheets->swap(sheets);
3138 
3139     m_styleSelector.clear();
3140     m_didCalculateStyleSelector = true;
3141     m_hasDirtyStyleSelector = false;
3142 }
3143 
setHoverNode(PassRefPtr<Node> newHoverNode)3144 void Document::setHoverNode(PassRefPtr<Node> newHoverNode)
3145 {
3146     m_hoverNode = newHoverNode;
3147 }
3148 
setActiveNode(PassRefPtr<Node> newActiveNode)3149 void Document::setActiveNode(PassRefPtr<Node> newActiveNode)
3150 {
3151     m_activeNode = newActiveNode;
3152 }
3153 
focusedNodeRemoved()3154 void Document::focusedNodeRemoved()
3155 {
3156     setFocusedNode(0);
3157 }
3158 
removeFocusedNodeOfSubtree(Node * node,bool amongChildrenOnly)3159 void Document::removeFocusedNodeOfSubtree(Node* node, bool amongChildrenOnly)
3160 {
3161     if (!m_focusedNode || this->inPageCache()) // If the document is in the page cache, then we don't need to clear out the focused node.
3162         return;
3163 
3164     bool nodeInSubtree = false;
3165     if (amongChildrenOnly)
3166         nodeInSubtree = m_focusedNode->isDescendantOf(node);
3167     else
3168         nodeInSubtree = (m_focusedNode == node) || m_focusedNode->isDescendantOf(node);
3169 
3170     if (nodeInSubtree)
3171         document()->focusedNodeRemoved();
3172 }
3173 
hoveredNodeDetached(Node * node)3174 void Document::hoveredNodeDetached(Node* node)
3175 {
3176     if (!m_hoverNode || (node != m_hoverNode && (!m_hoverNode->isTextNode() || node != m_hoverNode->parentNode())))
3177         return;
3178 
3179     m_hoverNode = node->parentNode();
3180     while (m_hoverNode && !m_hoverNode->renderer())
3181         m_hoverNode = m_hoverNode->parentNode();
3182     if (frame())
3183         frame()->eventHandler()->scheduleHoverStateUpdate();
3184 }
3185 
activeChainNodeDetached(Node * node)3186 void Document::activeChainNodeDetached(Node* node)
3187 {
3188     if (!m_activeNode || (node != m_activeNode && (!m_activeNode->isTextNode() || node != m_activeNode->parentNode())))
3189         return;
3190 
3191     m_activeNode = node->parentNode();
3192     while (m_activeNode && !m_activeNode->renderer())
3193         m_activeNode = m_activeNode->parentNode();
3194 }
3195 
3196 #if ENABLE(DASHBOARD_SUPPORT)
dashboardRegions() const3197 const Vector<DashboardRegionValue>& Document::dashboardRegions() const
3198 {
3199     return m_dashboardRegions;
3200 }
3201 
setDashboardRegions(const Vector<DashboardRegionValue> & regions)3202 void Document::setDashboardRegions(const Vector<DashboardRegionValue>& regions)
3203 {
3204     m_dashboardRegions = regions;
3205     setDashboardRegionsDirty(false);
3206 }
3207 #endif
3208 
setFocusedNode(PassRefPtr<Node> newFocusedNode)3209 bool Document::setFocusedNode(PassRefPtr<Node> newFocusedNode)
3210 {
3211     // Make sure newFocusedNode is actually in this document
3212     if (newFocusedNode && (newFocusedNode->document() != this))
3213         return true;
3214 
3215     if (m_focusedNode == newFocusedNode)
3216         return true;
3217 
3218     if (m_inPageCache)
3219         return false;
3220 
3221     bool focusChangeBlocked = false;
3222     RefPtr<Node> oldFocusedNode = m_focusedNode;
3223     m_focusedNode = 0;
3224 
3225     // Remove focus from the existing focus node (if any)
3226     if (oldFocusedNode && !oldFocusedNode->inDetach()) {
3227         if (oldFocusedNode->active())
3228             oldFocusedNode->setActive(false);
3229 
3230         oldFocusedNode->setFocus(false);
3231 
3232         // Dispatch a change event for text fields or textareas that have been edited
3233         if (oldFocusedNode->isElementNode()) {
3234             Element* element = static_cast<Element*>(oldFocusedNode.get());
3235             if (element->wasChangedSinceLastFormControlChangeEvent())
3236                 element->dispatchFormControlChangeEvent();
3237         }
3238 
3239         // Dispatch the blur event and let the node do any other blur related activities (important for text fields)
3240         oldFocusedNode->dispatchBlurEvent();
3241 
3242         if (m_focusedNode) {
3243             // handler shifted focus
3244             focusChangeBlocked = true;
3245             newFocusedNode = 0;
3246         }
3247 
3248         oldFocusedNode->dispatchUIEvent(eventNames().focusoutEvent, 0, 0); // DOM level 3 name for the bubbling blur event.
3249         // FIXME: We should remove firing DOMFocusOutEvent event when we are sure no content depends
3250         // on it, probably when <rdar://problem/8503958> is resolved.
3251         oldFocusedNode->dispatchUIEvent(eventNames().DOMFocusOutEvent, 0, 0); // DOM level 2 name for compatibility.
3252 
3253         if (m_focusedNode) {
3254             // handler shifted focus
3255             focusChangeBlocked = true;
3256             newFocusedNode = 0;
3257         }
3258         if (oldFocusedNode == this && oldFocusedNode->hasOneRef())
3259             return true;
3260 
3261         if (oldFocusedNode == oldFocusedNode->rootEditableElement())
3262             frame()->editor()->didEndEditing();
3263 
3264         if (view()) {
3265             Widget* oldWidget = widgetForNode(oldFocusedNode.get());
3266             if (oldWidget)
3267                 oldWidget->setFocus(false);
3268             else
3269                 view()->setFocus(false);
3270         }
3271     }
3272 
3273     if (newFocusedNode) {
3274         if (newFocusedNode == newFocusedNode->rootEditableElement() && !acceptsEditingFocus(newFocusedNode.get())) {
3275             // delegate blocks focus change
3276             focusChangeBlocked = true;
3277             goto SetFocusedNodeDone;
3278         }
3279         // Set focus on the new node
3280         m_focusedNode = newFocusedNode.get();
3281 
3282         // Dispatch the focus event and let the node do any other focus related activities (important for text fields)
3283         m_focusedNode->dispatchFocusEvent();
3284 
3285         if (m_focusedNode != newFocusedNode) {
3286             // handler shifted focus
3287             focusChangeBlocked = true;
3288             goto SetFocusedNodeDone;
3289         }
3290 
3291         m_focusedNode->dispatchUIEvent(eventNames().focusinEvent, 0, 0); // DOM level 3 bubbling focus event.
3292         // FIXME: We should remove firing DOMFocusInEvent event when we are sure no content depends
3293         // on it, probably when <rdar://problem/8503958> is resolved.
3294         m_focusedNode->dispatchUIEvent(eventNames().DOMFocusInEvent, 0, 0); // DOM level 2 for compatibility.
3295 
3296         if (m_focusedNode != newFocusedNode) {
3297             // handler shifted focus
3298             focusChangeBlocked = true;
3299             goto SetFocusedNodeDone;
3300         }
3301         m_focusedNode->setFocus(true);
3302 
3303         if (m_focusedNode == m_focusedNode->rootEditableElement())
3304             frame()->editor()->didBeginEditing();
3305 
3306         // eww, I suck. set the qt focus correctly
3307         // ### find a better place in the code for this
3308         if (view()) {
3309             Widget* focusWidget = widgetForNode(m_focusedNode.get());
3310             if (focusWidget) {
3311                 // Make sure a widget has the right size before giving it focus.
3312                 // Otherwise, we are testing edge cases of the Widget code.
3313                 // Specifically, in WebCore this does not work well for text fields.
3314                 updateLayout();
3315                 // Re-get the widget in case updating the layout changed things.
3316                 focusWidget = widgetForNode(m_focusedNode.get());
3317             }
3318             if (focusWidget)
3319                 focusWidget->setFocus(true);
3320             else
3321                 view()->setFocus(true);
3322         }
3323     }
3324 
3325 #if PLATFORM(MAC) || PLATFORM(WIN) || PLATFORM(GTK) || PLATFORM(CHROMIUM)
3326     if (!focusChangeBlocked && m_focusedNode && AXObjectCache::accessibilityEnabled()) {
3327         RenderObject* oldFocusedRenderer = 0;
3328         RenderObject* newFocusedRenderer = 0;
3329 
3330         if (oldFocusedNode)
3331             oldFocusedRenderer = oldFocusedNode->renderer();
3332         if (newFocusedNode)
3333             newFocusedRenderer = newFocusedNode->renderer();
3334 
3335         axObjectCache()->handleFocusedUIElementChanged(oldFocusedRenderer, newFocusedRenderer);
3336     }
3337 #endif
3338     if (!focusChangeBlocked)
3339         page()->chrome()->focusedNodeChanged(m_focusedNode.get());
3340 
3341 SetFocusedNodeDone:
3342     updateStyleIfNeeded();
3343     return !focusChangeBlocked;
3344 }
3345 
getFocusableNodes(Vector<RefPtr<Node>> & nodes)3346 void Document::getFocusableNodes(Vector<RefPtr<Node> >& nodes)
3347 {
3348     updateLayout();
3349 
3350     for (Node* node = firstChild(); node; node = node->traverseNextNode()) {
3351         if (node->isFocusable())
3352             nodes.append(node);
3353     }
3354 }
3355 
setCSSTarget(Element * n)3356 void Document::setCSSTarget(Element* n)
3357 {
3358     if (m_cssTarget)
3359         m_cssTarget->setNeedsStyleRecalc();
3360     m_cssTarget = n;
3361     if (n)
3362         n->setNeedsStyleRecalc();
3363 }
3364 
attachNodeIterator(NodeIterator * ni)3365 void Document::attachNodeIterator(NodeIterator* ni)
3366 {
3367     m_nodeIterators.add(ni);
3368 }
3369 
detachNodeIterator(NodeIterator * ni)3370 void Document::detachNodeIterator(NodeIterator* ni)
3371 {
3372     // The node iterator can be detached without having been attached if its root node didn't have a document
3373     // when the iterator was created, but has it now.
3374     m_nodeIterators.remove(ni);
3375 }
3376 
moveNodeIteratorsToNewDocument(Node * node,Document * newDocument)3377 void Document::moveNodeIteratorsToNewDocument(Node* node, Document* newDocument)
3378 {
3379     HashSet<NodeIterator*> nodeIteratorsList = m_nodeIterators;
3380     HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = nodeIteratorsList.end();
3381     for (HashSet<NodeIterator*>::const_iterator it = nodeIteratorsList.begin(); it != nodeIteratorsEnd; ++it) {
3382         if ((*it)->root() == node) {
3383             detachNodeIterator(*it);
3384             newDocument->attachNodeIterator(*it);
3385         }
3386     }
3387 }
3388 
nodeChildrenChanged(ContainerNode * container)3389 void Document::nodeChildrenChanged(ContainerNode* container)
3390 {
3391     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3392         HashSet<Range*>::const_iterator end = m_ranges.end();
3393         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3394             (*it)->nodeChildrenChanged(container);
3395     }
3396 }
3397 
nodeChildrenWillBeRemoved(ContainerNode * container)3398 void Document::nodeChildrenWillBeRemoved(ContainerNode* container)
3399 {
3400     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3401         HashSet<Range*>::const_iterator end = m_ranges.end();
3402         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3403             (*it)->nodeChildrenWillBeRemoved(container);
3404     }
3405 
3406     HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = m_nodeIterators.end();
3407     for (HashSet<NodeIterator*>::const_iterator it = m_nodeIterators.begin(); it != nodeIteratorsEnd; ++it) {
3408         for (Node* n = container->firstChild(); n; n = n->nextSibling())
3409             (*it)->nodeWillBeRemoved(n);
3410     }
3411 
3412     if (Frame* frame = this->frame()) {
3413         for (Node* n = container->firstChild(); n; n = n->nextSibling()) {
3414             frame->selection()->nodeWillBeRemoved(n);
3415             frame->page()->dragCaretController()->nodeWillBeRemoved(n);
3416         }
3417     }
3418 }
3419 
nodeWillBeRemoved(Node * n)3420 void Document::nodeWillBeRemoved(Node* n)
3421 {
3422     HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = m_nodeIterators.end();
3423     for (HashSet<NodeIterator*>::const_iterator it = m_nodeIterators.begin(); it != nodeIteratorsEnd; ++it)
3424         (*it)->nodeWillBeRemoved(n);
3425 
3426     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3427         HashSet<Range*>::const_iterator rangesEnd = m_ranges.end();
3428         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != rangesEnd; ++it)
3429             (*it)->nodeWillBeRemoved(n);
3430     }
3431 
3432     if (Frame* frame = this->frame()) {
3433         frame->selection()->nodeWillBeRemoved(n);
3434         frame->page()->dragCaretController()->nodeWillBeRemoved(n);
3435     }
3436 
3437 #if ENABLE(FULLSCREEN_API)
3438     // If the current full screen element or any of its ancestors is removed, set the current
3439     // full screen element to the document root, and fire a fullscreenchange event to inform
3440     // clients of the DOM.
3441     ASSERT(n);
3442     if (n->contains(m_fullScreenElement.get())) {
3443         ASSERT(n != documentElement());
3444 
3445         if (m_fullScreenRenderer)
3446             m_fullScreenRenderer->remove();
3447 
3448         setFullScreenRenderer(0);
3449         m_fullScreenElement = documentElement();
3450         recalcStyle(Force);
3451         m_fullScreenChangeDelayTimer.startOneShot(0);
3452     }
3453 #endif
3454 }
3455 
textInserted(Node * text,unsigned offset,unsigned length)3456 void Document::textInserted(Node* text, unsigned offset, unsigned length)
3457 {
3458     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3459         HashSet<Range*>::const_iterator end = m_ranges.end();
3460         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3461             (*it)->textInserted(text, offset, length);
3462     }
3463 
3464     // Update the markers for spelling and grammar checking.
3465     m_markers->shiftMarkers(text, offset, length);
3466 }
3467 
textRemoved(Node * text,unsigned offset,unsigned length)3468 void Document::textRemoved(Node* text, unsigned offset, unsigned length)
3469 {
3470     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3471         HashSet<Range*>::const_iterator end = m_ranges.end();
3472         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3473             (*it)->textRemoved(text, offset, length);
3474     }
3475 
3476     // Update the markers for spelling and grammar checking.
3477     m_markers->removeMarkers(text, offset, length);
3478     m_markers->shiftMarkers(text, offset + length, 0 - length);
3479 }
3480 
textNodesMerged(Text * oldNode,unsigned offset)3481 void Document::textNodesMerged(Text* oldNode, unsigned offset)
3482 {
3483     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3484         NodeWithIndex oldNodeWithIndex(oldNode);
3485         HashSet<Range*>::const_iterator end = m_ranges.end();
3486         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3487             (*it)->textNodesMerged(oldNodeWithIndex, offset);
3488     }
3489 
3490     // FIXME: This should update markers for spelling and grammar checking.
3491 }
3492 
textNodeSplit(Text * oldNode)3493 void Document::textNodeSplit(Text* oldNode)
3494 {
3495     if (!disableRangeMutation(page()) && !m_ranges.isEmpty()) {
3496         HashSet<Range*>::const_iterator end = m_ranges.end();
3497         for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
3498             (*it)->textNodeSplit(oldNode);
3499     }
3500 
3501     // FIXME: This should update markers for spelling and grammar checking.
3502 }
3503 
3504 // FIXME: eventually, this should return a DOMWindow stored in the document.
domWindow() const3505 DOMWindow* Document::domWindow() const
3506 {
3507     if (!frame())
3508         return 0;
3509 
3510     // 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.
3511     // FIXME: We should always zero out the frame pointer on navigation to avoid accidentally accessing the new frame content.
3512     if (m_frame->document() != this)
3513         return 0;
3514 
3515     return frame()->domWindow();
3516 }
3517 
setWindowAttributeEventListener(const AtomicString & eventType,PassRefPtr<EventListener> listener)3518 void Document::setWindowAttributeEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener)
3519 {
3520     DOMWindow* domWindow = this->domWindow();
3521     if (!domWindow)
3522         return;
3523     domWindow->setAttributeEventListener(eventType, listener);
3524 }
3525 
getWindowAttributeEventListener(const AtomicString & eventType)3526 EventListener* Document::getWindowAttributeEventListener(const AtomicString& eventType)
3527 {
3528     DOMWindow* domWindow = this->domWindow();
3529     if (!domWindow)
3530         return 0;
3531     return domWindow->getAttributeEventListener(eventType);
3532 }
3533 
dispatchWindowEvent(PassRefPtr<Event> event,PassRefPtr<EventTarget> target)3534 void Document::dispatchWindowEvent(PassRefPtr<Event> event,  PassRefPtr<EventTarget> target)
3535 {
3536     ASSERT(!eventDispatchForbidden());
3537     DOMWindow* domWindow = this->domWindow();
3538     if (!domWindow)
3539         return;
3540     domWindow->dispatchEvent(event, target);
3541 }
3542 
dispatchWindowLoadEvent()3543 void Document::dispatchWindowLoadEvent()
3544 {
3545     ASSERT(!eventDispatchForbidden());
3546     DOMWindow* domWindow = this->domWindow();
3547     if (!domWindow)
3548         return;
3549     domWindow->dispatchLoadEvent();
3550 }
3551 
enqueueWindowEvent(PassRefPtr<Event> event)3552 void Document::enqueueWindowEvent(PassRefPtr<Event> event)
3553 {
3554     event->setTarget(domWindow());
3555     m_eventQueue->enqueueEvent(event);
3556 }
3557 
enqueueDocumentEvent(PassRefPtr<Event> event)3558 void Document::enqueueDocumentEvent(PassRefPtr<Event> event)
3559 {
3560     event->setTarget(this);
3561     m_eventQueue->enqueueEvent(event);
3562 }
3563 
createEvent(const String & eventType,ExceptionCode & ec)3564 PassRefPtr<Event> Document::createEvent(const String& eventType, ExceptionCode& ec)
3565 {
3566     RefPtr<Event> event;
3567     if (eventType == "Event" || eventType == "Events" || eventType == "HTMLEvents")
3568         event = Event::create();
3569     else if (eventType == "CustomEvent")
3570         event = CustomEvent::create();
3571     else if (eventType == "KeyboardEvent" || eventType == "KeyboardEvents")
3572         event = KeyboardEvent::create();
3573     else if (eventType == "MessageEvent")
3574         event = MessageEvent::create();
3575     else if (eventType == "MouseEvent" || eventType == "MouseEvents")
3576         event = MouseEvent::create();
3577     else if (eventType == "MutationEvent" || eventType == "MutationEvents")
3578         event = MutationEvent::create();
3579     else if (eventType == "OverflowEvent")
3580         event = OverflowEvent::create();
3581     else if (eventType == "PageTransitionEvent")
3582         event = PageTransitionEvent::create();
3583     else if (eventType == "ProgressEvent")
3584         event = ProgressEvent::create();
3585 #if ENABLE(DOM_STORAGE)
3586     else if (eventType == "StorageEvent")
3587         event = StorageEvent::create();
3588 #endif
3589     else if (eventType == "TextEvent")
3590         event = TextEvent::create();
3591     else if (eventType == "UIEvent" || eventType == "UIEvents")
3592         event = UIEvent::create();
3593     else if (eventType == "WebKitAnimationEvent")
3594         event = WebKitAnimationEvent::create();
3595     else if (eventType == "WebKitTransitionEvent")
3596         event = WebKitTransitionEvent::create();
3597     else if (eventType == "WheelEvent")
3598         event = WheelEvent::create();
3599 #if ENABLE(SVG)
3600     else if (eventType == "SVGEvents")
3601         event = Event::create();
3602     else if (eventType == "SVGZoomEvents")
3603         event = SVGZoomEvent::create();
3604 #endif
3605 #if ENABLE(TOUCH_EVENTS)
3606 #if USE(V8)
3607     else if (eventType == "TouchEvent" && RuntimeEnabledFeatures::touchEnabled())
3608 #else
3609     else if (eventType == "TouchEvent")
3610 #endif
3611         event = TouchEvent::create();
3612 #endif
3613 #if ENABLE(DEVICE_ORIENTATION)
3614     else if (eventType == "DeviceMotionEvent")
3615         event = DeviceMotionEvent::create();
3616     else if (eventType == "DeviceOrientationEvent")
3617         event = DeviceOrientationEvent::create();
3618 #endif
3619 #if ENABLE(ORIENTATION_EVENTS)
3620     else if (eventType == "OrientationEvent")
3621         event = Event::create();
3622 #endif
3623     if (event)
3624         return event.release();
3625 
3626     ec = NOT_SUPPORTED_ERR;
3627     return 0;
3628 }
3629 
addListenerTypeIfNeeded(const AtomicString & eventType)3630 void Document::addListenerTypeIfNeeded(const AtomicString& eventType)
3631 {
3632     if (eventType == eventNames().DOMSubtreeModifiedEvent)
3633         addListenerType(DOMSUBTREEMODIFIED_LISTENER);
3634     else if (eventType == eventNames().DOMNodeInsertedEvent)
3635         addListenerType(DOMNODEINSERTED_LISTENER);
3636     else if (eventType == eventNames().DOMNodeRemovedEvent)
3637         addListenerType(DOMNODEREMOVED_LISTENER);
3638     else if (eventType == eventNames().DOMNodeRemovedFromDocumentEvent)
3639         addListenerType(DOMNODEREMOVEDFROMDOCUMENT_LISTENER);
3640     else if (eventType == eventNames().DOMNodeInsertedIntoDocumentEvent)
3641         addListenerType(DOMNODEINSERTEDINTODOCUMENT_LISTENER);
3642     else if (eventType == eventNames().DOMAttrModifiedEvent)
3643         addListenerType(DOMATTRMODIFIED_LISTENER);
3644     else if (eventType == eventNames().DOMCharacterDataModifiedEvent)
3645         addListenerType(DOMCHARACTERDATAMODIFIED_LISTENER);
3646     else if (eventType == eventNames().overflowchangedEvent)
3647         addListenerType(OVERFLOWCHANGED_LISTENER);
3648     else if (eventType == eventNames().webkitAnimationStartEvent)
3649         addListenerType(ANIMATIONSTART_LISTENER);
3650     else if (eventType == eventNames().webkitAnimationEndEvent)
3651         addListenerType(ANIMATIONEND_LISTENER);
3652     else if (eventType == eventNames().webkitAnimationIterationEvent)
3653         addListenerType(ANIMATIONITERATION_LISTENER);
3654     else if (eventType == eventNames().webkitTransitionEndEvent)
3655         addListenerType(TRANSITIONEND_LISTENER);
3656     else if (eventType == eventNames().beforeloadEvent)
3657         addListenerType(BEFORELOAD_LISTENER);
3658     else if (eventType == eventNames().beforeprocessEvent)
3659         addListenerType(BEFOREPROCESS_LISTENER);
3660 #if ENABLE(TOUCH_EVENTS)
3661     else if (eventType == eventNames().touchstartEvent
3662              || eventType == eventNames().touchmoveEvent
3663              || eventType == eventNames().touchendEvent
3664              || eventType == eventNames().touchcancelEvent) {
3665         addListenerType(TOUCH_LISTENER);
3666         if (Page* page = this->page())
3667             page->chrome()->client()->needTouchEvents(true);
3668     }
3669 #endif
3670 }
3671 
getOverrideStyle(Element *,const String &)3672 CSSStyleDeclaration* Document::getOverrideStyle(Element*, const String&)
3673 {
3674     return 0;
3675 }
3676 
ownerElement() const3677 HTMLFrameOwnerElement* Document::ownerElement() const
3678 {
3679     if (!frame())
3680         return 0;
3681     return frame()->ownerElement();
3682 }
3683 
cookie(ExceptionCode & ec) const3684 String Document::cookie(ExceptionCode& ec) const
3685 {
3686     if (page() && !page()->cookieEnabled())
3687         return String();
3688 
3689     // FIXME: The HTML5 DOM spec states that this attribute can raise an
3690     // INVALID_STATE_ERR exception on getting if the Document has no
3691     // browsing context.
3692 
3693     if (!securityOrigin()->canAccessCookies()) {
3694         ec = SECURITY_ERR;
3695         return String();
3696     }
3697 
3698     KURL cookieURL = this->cookieURL();
3699     if (cookieURL.isEmpty())
3700         return String();
3701 
3702     return cookies(this, cookieURL);
3703 }
3704 
setCookie(const String & value,ExceptionCode & ec)3705 void Document::setCookie(const String& value, ExceptionCode& ec)
3706 {
3707     if (page() && !page()->cookieEnabled())
3708         return;
3709 
3710     // FIXME: The HTML5 DOM spec states that this attribute can raise an
3711     // INVALID_STATE_ERR exception on setting if the Document has no
3712     // browsing context.
3713 
3714     if (!securityOrigin()->canAccessCookies()) {
3715         ec = SECURITY_ERR;
3716         return;
3717     }
3718 
3719     KURL cookieURL = this->cookieURL();
3720     if (cookieURL.isEmpty())
3721         return;
3722 
3723     setCookies(this, cookieURL, value);
3724 }
3725 
referrer() const3726 String Document::referrer() const
3727 {
3728     if (frame())
3729         return frame()->loader()->referrer();
3730     return String();
3731 }
3732 
domain() const3733 String Document::domain() const
3734 {
3735     return securityOrigin()->domain();
3736 }
3737 
setDomain(const String & newDomain,ExceptionCode & ec)3738 void Document::setDomain(const String& newDomain, ExceptionCode& ec)
3739 {
3740     if (SecurityOrigin::isDomainRelaxationForbiddenForURLScheme(securityOrigin()->protocol())) {
3741         ec = SECURITY_ERR;
3742         return;
3743     }
3744 
3745     // Both NS and IE specify that changing the domain is only allowed when
3746     // the new domain is a suffix of the old domain.
3747 
3748     // FIXME: We should add logging indicating why a domain was not allowed.
3749 
3750     // If the new domain is the same as the old domain, still call
3751     // securityOrigin()->setDomainForDOM. This will change the
3752     // security check behavior. For example, if a page loaded on port 8000
3753     // assigns its current domain using document.domain, the page will
3754     // allow other pages loaded on different ports in the same domain that
3755     // have also assigned to access this page.
3756     if (equalIgnoringCase(domain(), newDomain)) {
3757         securityOrigin()->setDomainFromDOM(newDomain);
3758         if (m_frame)
3759             m_frame->script()->updateSecurityOrigin();
3760         return;
3761     }
3762 
3763     int oldLength = domain().length();
3764     int newLength = newDomain.length();
3765     // e.g. newDomain = webkit.org (10) and domain() = www.webkit.org (14)
3766     if (newLength >= oldLength) {
3767         ec = SECURITY_ERR;
3768         return;
3769     }
3770 
3771     String test = domain();
3772     // Check that it's a subdomain, not e.g. "ebkit.org"
3773     if (test[oldLength - newLength - 1] != '.') {
3774         ec = SECURITY_ERR;
3775         return;
3776     }
3777 
3778     // Now test is "webkit.org" from domain()
3779     // and we check that it's the same thing as newDomain
3780     test.remove(0, oldLength - newLength);
3781     if (test != newDomain) {
3782         ec = SECURITY_ERR;
3783         return;
3784     }
3785 
3786     securityOrigin()->setDomainFromDOM(newDomain);
3787     if (m_frame)
3788         m_frame->script()->updateSecurityOrigin();
3789 }
3790 
3791 // http://www.whatwg.org/specs/web-apps/current-work/#dom-document-lastmodified
lastModified() const3792 String Document::lastModified() const
3793 {
3794     DateComponents date;
3795     bool foundDate = false;
3796     if (m_frame) {
3797         String httpLastModified;
3798         if (DocumentLoader* documentLoader = loader())
3799             httpLastModified = documentLoader->response().httpHeaderField("Last-Modified");
3800         if (!httpLastModified.isEmpty()) {
3801             date.setMillisecondsSinceEpochForDateTime(parseDate(httpLastModified));
3802             foundDate = true;
3803         }
3804     }
3805     // FIXME: If this document came from the file system, the HTML5
3806     // specificiation tells us to read the last modification date from the file
3807     // system.
3808     if (!foundDate)
3809         date.setMillisecondsSinceEpochForDateTime(currentTimeMS());
3810     return String::format("%02d/%02d/%04d %02d:%02d:%02d", date.month() + 1, date.monthDay(), date.fullYear(), date.hour(), date.minute(), date.second());
3811 }
3812 
isValidNameNonASCII(const UChar * characters,unsigned length)3813 static bool isValidNameNonASCII(const UChar* characters, unsigned length)
3814 {
3815     unsigned i = 0;
3816 
3817     UChar32 c;
3818     U16_NEXT(characters, i, length, c)
3819     if (!isValidNameStart(c))
3820         return false;
3821 
3822     while (i < length) {
3823         U16_NEXT(characters, i, length, c)
3824         if (!isValidNamePart(c))
3825             return false;
3826     }
3827 
3828     return true;
3829 }
3830 
isValidNameASCII(const UChar * characters,unsigned length)3831 static inline bool isValidNameASCII(const UChar* characters, unsigned length)
3832 {
3833     UChar c = characters[0];
3834     if (!(isASCIIAlpha(c) || c == ':' || c == '_'))
3835         return false;
3836 
3837     for (unsigned i = 1; i < length; ++i) {
3838         c = characters[i];
3839         if (!(isASCIIAlphanumeric(c) || c == ':' || c == '_' || c == '-' || c == '.'))
3840             return false;
3841     }
3842 
3843     return true;
3844 }
3845 
isValidName(const String & name)3846 bool Document::isValidName(const String& name)
3847 {
3848     unsigned length = name.length();
3849     if (!length)
3850         return false;
3851 
3852     const UChar* characters = name.characters();
3853     return isValidNameASCII(characters, length) || isValidNameNonASCII(characters, length);
3854 }
3855 
parseQualifiedName(const String & qualifiedName,String & prefix,String & localName,ExceptionCode & ec)3856 bool Document::parseQualifiedName(const String& qualifiedName, String& prefix, String& localName, ExceptionCode& ec)
3857 {
3858     unsigned length = qualifiedName.length();
3859 
3860     if (!length) {
3861         ec = INVALID_CHARACTER_ERR;
3862         return false;
3863     }
3864 
3865     bool nameStart = true;
3866     bool sawColon = false;
3867     int colonPos = 0;
3868 
3869     const UChar* s = qualifiedName.characters();
3870     for (unsigned i = 0; i < length;) {
3871         UChar32 c;
3872         U16_NEXT(s, i, length, c)
3873         if (c == ':') {
3874             if (sawColon) {
3875                 ec = NAMESPACE_ERR;
3876                 return false; // multiple colons: not allowed
3877             }
3878             nameStart = true;
3879             sawColon = true;
3880             colonPos = i - 1;
3881         } else if (nameStart) {
3882             if (!isValidNameStart(c)) {
3883                 ec = INVALID_CHARACTER_ERR;
3884                 return false;
3885             }
3886             nameStart = false;
3887         } else {
3888             if (!isValidNamePart(c)) {
3889                 ec = INVALID_CHARACTER_ERR;
3890                 return false;
3891             }
3892         }
3893     }
3894 
3895     if (!sawColon) {
3896         prefix = String();
3897         localName = qualifiedName;
3898     } else {
3899         prefix = qualifiedName.substring(0, colonPos);
3900         if (prefix.isEmpty()) {
3901             ec = NAMESPACE_ERR;
3902             return false;
3903         }
3904         localName = qualifiedName.substring(colonPos + 1);
3905     }
3906 
3907     if (localName.isEmpty()) {
3908         ec = NAMESPACE_ERR;
3909         return false;
3910     }
3911 
3912     return true;
3913 }
3914 
setDecoder(PassRefPtr<TextResourceDecoder> decoder)3915 void Document::setDecoder(PassRefPtr<TextResourceDecoder> decoder)
3916 {
3917     m_decoder = decoder;
3918 }
3919 
completeURL(const String & url) const3920 KURL Document::completeURL(const String& url) const
3921 {
3922     // Always return a null URL when passed a null string.
3923     // FIXME: Should we change the KURL constructor to have this behavior?
3924     // See also [CSS]StyleSheet::completeURL(const String&)
3925     if (url.isNull())
3926         return KURL();
3927     const KURL& baseURL = ((m_baseURL.isEmpty() || m_baseURL == blankURL()) && parentDocument()) ? parentDocument()->baseURL() : m_baseURL;
3928     if (!m_decoder)
3929         return KURL(baseURL, url);
3930     return KURL(baseURL, url, m_decoder->encoding());
3931 }
3932 
setInPageCache(bool flag)3933 void Document::setInPageCache(bool flag)
3934 {
3935     if (m_inPageCache == flag)
3936         return;
3937 
3938     m_inPageCache = flag;
3939     if (flag) {
3940         ASSERT(!m_savedRenderer);
3941         m_savedRenderer = renderer();
3942         if (FrameView* v = view())
3943             v->resetScrollbarsAndClearContentsSize();
3944         m_styleRecalcTimer.stop();
3945     } else {
3946         ASSERT(!renderer() || renderer() == m_savedRenderer);
3947         ASSERT(m_renderArena);
3948         setRenderer(m_savedRenderer);
3949         m_savedRenderer = 0;
3950 
3951         if (frame() && frame()->page())
3952             frame()->page()->updateViewportArguments();
3953 
3954         if (childNeedsStyleRecalc())
3955             scheduleStyleRecalc();
3956     }
3957 }
3958 
documentWillBecomeInactive()3959 void Document::documentWillBecomeInactive()
3960 {
3961 #if USE(ACCELERATED_COMPOSITING)
3962     if (renderer())
3963         renderView()->willMoveOffscreen();
3964 #endif
3965 
3966     HashSet<Element*>::iterator end = m_documentActivationCallbackElements.end();
3967     for (HashSet<Element*>::iterator i = m_documentActivationCallbackElements.begin(); i != end; ++i)
3968         (*i)->documentWillBecomeInactive();
3969 }
3970 
documentDidBecomeActive()3971 void Document::documentDidBecomeActive()
3972 {
3973     HashSet<Element*>::iterator end = m_documentActivationCallbackElements.end();
3974     for (HashSet<Element*>::iterator i = m_documentActivationCallbackElements.begin(); i != end; ++i)
3975         (*i)->documentDidBecomeActive();
3976 
3977 #if USE(ACCELERATED_COMPOSITING)
3978     if (renderer())
3979         renderView()->didMoveOnscreen();
3980 #endif
3981 
3982     ASSERT(m_frame);
3983     m_frame->loader()->client()->dispatchDidBecomeFrameset(isFrameSet());
3984 }
3985 
registerForDocumentActivationCallbacks(Element * e)3986 void Document::registerForDocumentActivationCallbacks(Element* e)
3987 {
3988     m_documentActivationCallbackElements.add(e);
3989 }
3990 
unregisterForDocumentActivationCallbacks(Element * e)3991 void Document::unregisterForDocumentActivationCallbacks(Element* e)
3992 {
3993     m_documentActivationCallbackElements.remove(e);
3994 }
3995 
mediaVolumeDidChange()3996 void Document::mediaVolumeDidChange()
3997 {
3998     HashSet<Element*>::iterator end = m_mediaVolumeCallbackElements.end();
3999     for (HashSet<Element*>::iterator i = m_mediaVolumeCallbackElements.begin(); i != end; ++i)
4000         (*i)->mediaVolumeDidChange();
4001 }
4002 
registerForMediaVolumeCallbacks(Element * e)4003 void Document::registerForMediaVolumeCallbacks(Element* e)
4004 {
4005     m_mediaVolumeCallbackElements.add(e);
4006 }
4007 
unregisterForMediaVolumeCallbacks(Element * e)4008 void Document::unregisterForMediaVolumeCallbacks(Element* e)
4009 {
4010     m_mediaVolumeCallbackElements.remove(e);
4011 }
4012 
privateBrowsingStateDidChange()4013 void Document::privateBrowsingStateDidChange()
4014 {
4015     HashSet<Element*>::iterator end = m_privateBrowsingStateChangedElements.end();
4016     for (HashSet<Element*>::iterator it = m_privateBrowsingStateChangedElements.begin(); it != end; ++it)
4017         (*it)->privateBrowsingStateDidChange();
4018 }
4019 
registerForPrivateBrowsingStateChangedCallbacks(Element * e)4020 void Document::registerForPrivateBrowsingStateChangedCallbacks(Element* e)
4021 {
4022     m_privateBrowsingStateChangedElements.add(e);
4023 }
4024 
unregisterForPrivateBrowsingStateChangedCallbacks(Element * e)4025 void Document::unregisterForPrivateBrowsingStateChangedCallbacks(Element* e)
4026 {
4027     m_privateBrowsingStateChangedElements.remove(e);
4028 }
4029 
setShouldCreateRenderers(bool f)4030 void Document::setShouldCreateRenderers(bool f)
4031 {
4032     m_createRenderers = f;
4033 }
4034 
shouldCreateRenderers()4035 bool Document::shouldCreateRenderers()
4036 {
4037     return m_createRenderers;
4038 }
4039 
4040 // Support for Javascript execCommand, and related methods
4041 
command(Document * document,const String & commandName,bool userInterface=false)4042 static Editor::Command command(Document* document, const String& commandName, bool userInterface = false)
4043 {
4044     Frame* frame = document->frame();
4045     if (!frame || frame->document() != document)
4046         return Editor::Command();
4047 
4048     document->updateStyleIfNeeded();
4049 
4050     return frame->editor()->command(commandName,
4051         userInterface ? CommandFromDOMWithUserInterface : CommandFromDOM);
4052 }
4053 
execCommand(const String & commandName,bool userInterface,const String & value)4054 bool Document::execCommand(const String& commandName, bool userInterface, const String& value)
4055 {
4056     return command(this, commandName, userInterface).execute(value);
4057 }
4058 
queryCommandEnabled(const String & commandName)4059 bool Document::queryCommandEnabled(const String& commandName)
4060 {
4061     return command(this, commandName).isEnabled();
4062 }
4063 
queryCommandIndeterm(const String & commandName)4064 bool Document::queryCommandIndeterm(const String& commandName)
4065 {
4066     return command(this, commandName).state() == MixedTriState;
4067 }
4068 
queryCommandState(const String & commandName)4069 bool Document::queryCommandState(const String& commandName)
4070 {
4071     return command(this, commandName).state() == TrueTriState;
4072 }
4073 
queryCommandSupported(const String & commandName)4074 bool Document::queryCommandSupported(const String& commandName)
4075 {
4076     return command(this, commandName).isSupported();
4077 }
4078 
queryCommandValue(const String & commandName)4079 String Document::queryCommandValue(const String& commandName)
4080 {
4081     return command(this, commandName).value();
4082 }
4083 
4084 #if ENABLE(XSLT)
4085 
applyXSLTransform(ProcessingInstruction * pi)4086 void Document::applyXSLTransform(ProcessingInstruction* pi)
4087 {
4088     RefPtr<XSLTProcessor> processor = XSLTProcessor::create();
4089     processor->setXSLStyleSheet(static_cast<XSLStyleSheet*>(pi->sheet()));
4090     String resultMIMEType;
4091     String newSource;
4092     String resultEncoding;
4093     if (!processor->transformToString(this, resultMIMEType, newSource, resultEncoding))
4094         return;
4095     // FIXME: If the transform failed we should probably report an error (like Mozilla does).
4096     processor->createDocumentFromSource(newSource, resultEncoding, resultMIMEType, this, frame());
4097 }
4098 
setTransformSource(PassOwnPtr<TransformSource> source)4099 void Document::setTransformSource(PassOwnPtr<TransformSource> source)
4100 {
4101     if (m_transformSource == source)
4102         return;
4103     m_transformSource = source;
4104 }
4105 
4106 #endif
4107 
setDesignMode(InheritedBool value)4108 void Document::setDesignMode(InheritedBool value)
4109 {
4110     m_designMode = value;
4111     for (Frame* frame = m_frame; frame && frame->document(); frame = frame->tree()->traverseNext(m_frame))
4112         frame->document()->scheduleForcedStyleRecalc();
4113 }
4114 
getDesignMode() const4115 Document::InheritedBool Document::getDesignMode() const
4116 {
4117     return m_designMode;
4118 }
4119 
inDesignMode() const4120 bool Document::inDesignMode() const
4121 {
4122     for (const Document* d = this; d; d = d->parentDocument()) {
4123         if (d->m_designMode != inherit)
4124             return d->m_designMode;
4125     }
4126     return false;
4127 }
4128 
parentDocument() const4129 Document* Document::parentDocument() const
4130 {
4131     if (!m_frame)
4132         return 0;
4133     Frame* parent = m_frame->tree()->parent();
4134     if (!parent)
4135         return 0;
4136     return parent->document();
4137 }
4138 
topDocument() const4139 Document* Document::topDocument() const
4140 {
4141     Document* doc = const_cast<Document *>(this);
4142     Element* element;
4143     while ((element = doc->ownerElement()))
4144         doc = element->document();
4145 
4146     return doc;
4147 }
4148 
createAttribute(const String & name,ExceptionCode & ec)4149 PassRefPtr<Attr> Document::createAttribute(const String& name, ExceptionCode& ec)
4150 {
4151     return createAttributeNS(String(), name, ec, true);
4152 }
4153 
createAttributeNS(const String & namespaceURI,const String & qualifiedName,ExceptionCode & ec,bool shouldIgnoreNamespaceChecks)4154 PassRefPtr<Attr> Document::createAttributeNS(const String& namespaceURI, const String& qualifiedName, ExceptionCode& ec, bool shouldIgnoreNamespaceChecks)
4155 {
4156     String prefix, localName;
4157     if (!parseQualifiedName(qualifiedName, prefix, localName, ec))
4158         return 0;
4159 
4160     QualifiedName qName(prefix, localName, namespaceURI);
4161     if (!shouldIgnoreNamespaceChecks && hasPrefixNamespaceMismatch(qName)) {
4162         ec = NAMESPACE_ERR;
4163         return 0;
4164     }
4165 
4166     // Spec: DOM Level 2 Core: http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-DocCrAttrNS
4167     if (!shouldIgnoreNamespaceChecks && qName.localName() == xmlnsAtom && qName.namespaceURI() != XMLNSNames::xmlnsNamespaceURI) {
4168         ec = NAMESPACE_ERR;
4169         return 0;
4170     }
4171 
4172     // FIXME: Assume this is a mapped attribute, since createAttribute isn't namespace-aware.  There's no harm to XML
4173     // documents if we're wrong.
4174     return Attr::create(0, this, Attribute::createMapped(qName, StringImpl::empty()));
4175 }
4176 
4177 #if ENABLE(SVG)
svgExtensions()4178 const SVGDocumentExtensions* Document::svgExtensions()
4179 {
4180     return m_svgExtensions.get();
4181 }
4182 
accessSVGExtensions()4183 SVGDocumentExtensions* Document::accessSVGExtensions()
4184 {
4185     if (!m_svgExtensions)
4186         m_svgExtensions = adoptPtr(new SVGDocumentExtensions(this));
4187     return m_svgExtensions.get();
4188 }
4189 
hasSVGRootNode() const4190 bool Document::hasSVGRootNode() const
4191 {
4192     return documentElement() && documentElement()->hasTagName(SVGNames::svgTag);
4193 }
4194 #endif
4195 
images()4196 PassRefPtr<HTMLCollection> Document::images()
4197 {
4198     return HTMLCollection::create(this, DocImages);
4199 }
4200 
applets()4201 PassRefPtr<HTMLCollection> Document::applets()
4202 {
4203     return HTMLCollection::create(this, DocApplets);
4204 }
4205 
embeds()4206 PassRefPtr<HTMLCollection> Document::embeds()
4207 {
4208     return HTMLCollection::create(this, DocEmbeds);
4209 }
4210 
plugins()4211 PassRefPtr<HTMLCollection> Document::plugins()
4212 {
4213     // This is an alias for embeds() required for the JS DOM bindings.
4214     return HTMLCollection::create(this, DocEmbeds);
4215 }
4216 
objects()4217 PassRefPtr<HTMLCollection> Document::objects()
4218 {
4219     return HTMLCollection::create(this, DocObjects);
4220 }
4221 
scripts()4222 PassRefPtr<HTMLCollection> Document::scripts()
4223 {
4224     return HTMLCollection::create(this, DocScripts);
4225 }
4226 
links()4227 PassRefPtr<HTMLCollection> Document::links()
4228 {
4229     return HTMLCollection::create(this, DocLinks);
4230 }
4231 
forms()4232 PassRefPtr<HTMLCollection> Document::forms()
4233 {
4234     return HTMLCollection::create(this, DocForms);
4235 }
4236 
anchors()4237 PassRefPtr<HTMLCollection> Document::anchors()
4238 {
4239     return HTMLCollection::create(this, DocAnchors);
4240 }
4241 
all()4242 PassRefPtr<HTMLAllCollection> Document::all()
4243 {
4244     return HTMLAllCollection::create(this);
4245 }
4246 
windowNamedItems(const String & name)4247 PassRefPtr<HTMLCollection> Document::windowNamedItems(const String &name)
4248 {
4249     return HTMLNameCollection::create(this, WindowNamedItems, name);
4250 }
4251 
documentNamedItems(const String & name)4252 PassRefPtr<HTMLCollection> Document::documentNamedItems(const String &name)
4253 {
4254     return HTMLNameCollection::create(this, DocumentNamedItems, name);
4255 }
4256 
nameCollectionInfo(CollectionType type,const AtomicString & name)4257 CollectionCache* Document::nameCollectionInfo(CollectionType type, const AtomicString& name)
4258 {
4259     ASSERT(type >= FirstNamedDocumentCachedType);
4260     unsigned index = type - FirstNamedDocumentCachedType;
4261     ASSERT(index < NumNamedDocumentCachedTypes);
4262 
4263     NamedCollectionMap& map = m_nameCollectionInfo[index];
4264     NamedCollectionMap::iterator iter = map.find(name.impl());
4265     if (iter == map.end())
4266         iter = map.add(name.impl(), new CollectionCache).first;
4267     iter->second->checkConsistency();
4268     return iter->second;
4269 }
4270 
finishedParsing()4271 void Document::finishedParsing()
4272 {
4273     ASSERT(!scriptableDocumentParser() || !m_parser->isParsing());
4274     ASSERT(!scriptableDocumentParser() || m_readyState != Loading);
4275     setParsing(false);
4276     if (!m_documentTiming.domContentLoadedEventStart)
4277         m_documentTiming.domContentLoadedEventStart = currentTime();
4278     dispatchEvent(Event::create(eventNames().DOMContentLoadedEvent, true, false));
4279     if (!m_documentTiming.domContentLoadedEventEnd)
4280         m_documentTiming.domContentLoadedEventEnd = currentTime();
4281 
4282     if (RefPtr<Frame> f = frame()) {
4283         // FrameLoader::finishedParsing() might end up calling Document::implicitClose() if all
4284         // resource loads are complete. HTMLObjectElements can start loading their resources from
4285         // post attach callbacks triggered by recalcStyle().  This means if we parse out an <object>
4286         // tag and then reach the end of the document without updating styles, we might not have yet
4287         // started the resource load and might fire the window load event too early.  To avoid this
4288         // we force the styles to be up to date before calling FrameLoader::finishedParsing().
4289         // See https://bugs.webkit.org/show_bug.cgi?id=36864 starting around comment 35.
4290         updateStyleIfNeeded();
4291 
4292         f->loader()->finishedParsing();
4293 
4294         InspectorInstrumentation::domContentLoadedEventFired(f.get(), url());
4295     }
4296 }
4297 
formElementsState() const4298 Vector<String> Document::formElementsState() const
4299 {
4300     Vector<String> stateVector;
4301     stateVector.reserveInitialCapacity(m_formElementsWithState.size() * 3);
4302     typedef FormElementListHashSet::const_iterator Iterator;
4303     Iterator end = m_formElementsWithState.end();
4304     for (Iterator it = m_formElementsWithState.begin(); it != end; ++it) {
4305         Element* elementWithState = *it;
4306         String value;
4307         if (!elementWithState->shouldSaveAndRestoreFormControlState())
4308             continue;
4309         if (!elementWithState->saveFormControlState(value))
4310             continue;
4311         stateVector.append(elementWithState->formControlName().string());
4312         stateVector.append(elementWithState->formControlType().string());
4313         stateVector.append(value);
4314     }
4315     return stateVector;
4316 }
4317 
4318 #if ENABLE(XPATH)
4319 
createExpression(const String & expression,XPathNSResolver * resolver,ExceptionCode & ec)4320 PassRefPtr<XPathExpression> Document::createExpression(const String& expression,
4321                                                        XPathNSResolver* resolver,
4322                                                        ExceptionCode& ec)
4323 {
4324     if (!m_xpathEvaluator)
4325         m_xpathEvaluator = XPathEvaluator::create();
4326     return m_xpathEvaluator->createExpression(expression, resolver, ec);
4327 }
4328 
createNSResolver(Node * nodeResolver)4329 PassRefPtr<XPathNSResolver> Document::createNSResolver(Node* nodeResolver)
4330 {
4331     if (!m_xpathEvaluator)
4332         m_xpathEvaluator = XPathEvaluator::create();
4333     return m_xpathEvaluator->createNSResolver(nodeResolver);
4334 }
4335 
evaluate(const String & expression,Node * contextNode,XPathNSResolver * resolver,unsigned short type,XPathResult * result,ExceptionCode & ec)4336 PassRefPtr<XPathResult> Document::evaluate(const String& expression,
4337                                            Node* contextNode,
4338                                            XPathNSResolver* resolver,
4339                                            unsigned short type,
4340                                            XPathResult* result,
4341                                            ExceptionCode& ec)
4342 {
4343     if (!m_xpathEvaluator)
4344         m_xpathEvaluator = XPathEvaluator::create();
4345     return m_xpathEvaluator->evaluate(expression, contextNode, resolver, type, result, ec);
4346 }
4347 
4348 #endif // ENABLE(XPATH)
4349 
setStateForNewFormElements(const Vector<String> & stateVector)4350 void Document::setStateForNewFormElements(const Vector<String>& stateVector)
4351 {
4352     // Walk the state vector backwards so that the value to use for each
4353     // name/type pair first is the one at the end of each individual vector
4354     // in the FormElementStateMap. We're using them like stacks.
4355     typedef FormElementStateMap::iterator Iterator;
4356     m_formElementsWithState.clear();
4357     for (size_t i = stateVector.size() / 3 * 3; i; i -= 3) {
4358         AtomicString a = stateVector[i - 3];
4359         AtomicString b = stateVector[i - 2];
4360         const String& c = stateVector[i - 1];
4361         FormElementKey key(a.impl(), b.impl());
4362         Iterator it = m_stateForNewFormElements.find(key);
4363         if (it != m_stateForNewFormElements.end())
4364             it->second.append(c);
4365         else {
4366             Vector<String> v(1);
4367             v[0] = c;
4368             m_stateForNewFormElements.set(key, v);
4369         }
4370     }
4371 }
4372 
hasStateForNewFormElements() const4373 bool Document::hasStateForNewFormElements() const
4374 {
4375     return !m_stateForNewFormElements.isEmpty();
4376 }
4377 
takeStateForFormElement(AtomicStringImpl * name,AtomicStringImpl * type,String & state)4378 bool Document::takeStateForFormElement(AtomicStringImpl* name, AtomicStringImpl* type, String& state)
4379 {
4380     typedef FormElementStateMap::iterator Iterator;
4381     Iterator it = m_stateForNewFormElements.find(FormElementKey(name, type));
4382     if (it == m_stateForNewFormElements.end())
4383         return false;
4384     ASSERT(it->second.size());
4385     state = it->second.last();
4386     if (it->second.size() > 1)
4387         it->second.removeLast();
4388     else
4389         m_stateForNewFormElements.remove(it);
4390     return true;
4391 }
4392 
FormElementKey(AtomicStringImpl * name,AtomicStringImpl * type)4393 FormElementKey::FormElementKey(AtomicStringImpl* name, AtomicStringImpl* type)
4394     : m_name(name), m_type(type)
4395 {
4396     ref();
4397 }
4398 
~FormElementKey()4399 FormElementKey::~FormElementKey()
4400 {
4401     deref();
4402 }
4403 
FormElementKey(const FormElementKey & other)4404 FormElementKey::FormElementKey(const FormElementKey& other)
4405     : m_name(other.name()), m_type(other.type())
4406 {
4407     ref();
4408 }
4409 
operator =(const FormElementKey & other)4410 FormElementKey& FormElementKey::operator=(const FormElementKey& other)
4411 {
4412     other.ref();
4413     deref();
4414     m_name = other.name();
4415     m_type = other.type();
4416     return *this;
4417 }
4418 
ref() const4419 void FormElementKey::ref() const
4420 {
4421     if (name())
4422         name()->ref();
4423     if (type())
4424         type()->ref();
4425 }
4426 
deref() const4427 void FormElementKey::deref() const
4428 {
4429     if (name())
4430         name()->deref();
4431     if (type())
4432         type()->deref();
4433 }
4434 
hash(const FormElementKey & key)4435 unsigned FormElementKeyHash::hash(const FormElementKey& key)
4436 {
4437     return StringHasher::hashMemory<sizeof(FormElementKey)>(&key);
4438 }
4439 
setIconURL(const String & iconURL,const String & type)4440 void Document::setIconURL(const String& iconURL, const String& type)
4441 {
4442     // FIXME - <rdar://problem/4727645> - At some point in the future, we might actually honor the "type"
4443     if (m_iconURL.isEmpty())
4444         m_iconURL = iconURL;
4445     else if (!type.isEmpty())
4446         m_iconURL = iconURL;
4447     if (Frame* f = frame())
4448         f->loader()->setIconURL(m_iconURL);
4449 }
4450 
registerFormElementWithFormAttribute(FormAssociatedElement * element)4451 void Document::registerFormElementWithFormAttribute(FormAssociatedElement* element)
4452 {
4453     ASSERT(toHTMLElement(element)->fastHasAttribute(formAttr));
4454     m_formElementsWithFormAttribute.add(element);
4455 }
4456 
unregisterFormElementWithFormAttribute(FormAssociatedElement * element)4457 void Document::unregisterFormElementWithFormAttribute(FormAssociatedElement* element)
4458 {
4459     m_formElementsWithFormAttribute.remove(element);
4460 }
4461 
resetFormElementsOwner(HTMLFormElement * form)4462 void Document::resetFormElementsOwner(HTMLFormElement* form)
4463 {
4464     typedef FormAssociatedElementListHashSet::iterator Iterator;
4465     Iterator end = m_formElementsWithFormAttribute.end();
4466     for (Iterator it = m_formElementsWithFormAttribute.begin(); it != end; ++it)
4467         (*it)->resetFormOwner(form);
4468 }
4469 
setUseSecureKeyboardEntryWhenActive(bool usesSecureKeyboard)4470 void Document::setUseSecureKeyboardEntryWhenActive(bool usesSecureKeyboard)
4471 {
4472     if (m_useSecureKeyboardEntryWhenActive == usesSecureKeyboard)
4473         return;
4474 
4475     m_useSecureKeyboardEntryWhenActive = usesSecureKeyboard;
4476     m_frame->selection()->updateSecureKeyboardEntryIfActive();
4477 }
4478 
useSecureKeyboardEntryWhenActive() const4479 bool Document::useSecureKeyboardEntryWhenActive() const
4480 {
4481     return m_useSecureKeyboardEntryWhenActive;
4482 }
4483 
initSecurityContext()4484 void Document::initSecurityContext()
4485 {
4486     if (securityOrigin() && !securityOrigin()->isEmpty())
4487         return; // m_securityOrigin has already been initialized.
4488 
4489     if (!m_frame) {
4490         // No source for a security context.
4491         // This can occur via document.implementation.createDocument().
4492         m_cookieURL = KURL(ParsedURLString, "");
4493         ScriptExecutionContext::setSecurityOrigin(SecurityOrigin::createEmpty());
4494         m_contentSecurityPolicy = ContentSecurityPolicy::create();
4495         return;
4496     }
4497 
4498     // In the common case, create the security context from the currently
4499     // loading URL with a fresh content security policy.
4500     m_cookieURL = m_url;
4501     ScriptExecutionContext::setSecurityOrigin(SecurityOrigin::create(m_url, m_frame->loader()->sandboxFlags()));
4502     m_contentSecurityPolicy = ContentSecurityPolicy::create(securityOrigin());
4503 
4504     if (SecurityOrigin::allowSubstituteDataAccessToLocal()) {
4505         // If this document was loaded with substituteData, then the document can
4506         // load local resources.  See https://bugs.webkit.org/show_bug.cgi?id=16756
4507         // and https://bugs.webkit.org/show_bug.cgi?id=19760 for further
4508         // discussion.
4509 
4510         DocumentLoader* documentLoader = loader();
4511         if (documentLoader && documentLoader->substituteData().isValid())
4512             securityOrigin()->grantLoadLocalResources();
4513     }
4514 
4515     if (Settings* settings = this->settings()) {
4516         if (!settings->isWebSecurityEnabled()) {
4517           // Web security is turned off.  We should let this document access every
4518           // other document.  This is used primary by testing harnesses for web
4519           // sites.
4520           securityOrigin()->grantUniversalAccess();
4521 
4522         } else if (settings->allowUniversalAccessFromFileURLs() && securityOrigin()->isLocal()) {
4523           // Some clients want file:// URLs to have universal access, but that
4524           // setting is dangerous for other clients.
4525           securityOrigin()->grantUniversalAccess();
4526         } else if (!settings->allowFileAccessFromFileURLs() && securityOrigin()->isLocal()) {
4527           // Some clients want file:// URLs to have even tighter restrictions by
4528           // default, and not be able to access other local files.
4529           securityOrigin()->enforceFilePathSeparation();
4530         }
4531     }
4532 
4533     if (!securityOrigin()->isEmpty())
4534         return;
4535 
4536     // If we do not obtain a meaningful origin from the URL, then we try to
4537     // find one via the frame hierarchy.
4538 
4539     Frame* ownerFrame = m_frame->tree()->parent();
4540     if (!ownerFrame)
4541         ownerFrame = m_frame->loader()->opener();
4542 
4543     if (ownerFrame) {
4544         m_cookieURL = ownerFrame->document()->cookieURL();
4545         // We alias the SecurityOrigins to match Firefox, see Bug 15313
4546         // https://bugs.webkit.org/show_bug.cgi?id=15313
4547         ScriptExecutionContext::setSecurityOrigin(ownerFrame->document()->securityOrigin());
4548         // FIXME: Consider moving m_contentSecurityPolicy into SecurityOrigin.
4549         m_contentSecurityPolicy = ownerFrame->document()->contentSecurityPolicy();
4550     }
4551 }
4552 
setSecurityOrigin(SecurityOrigin * securityOrigin)4553 void Document::setSecurityOrigin(SecurityOrigin* securityOrigin)
4554 {
4555     ScriptExecutionContext::setSecurityOrigin(securityOrigin);
4556     // FIXME: Find a better place to enable DNS prefetch, which is a loader concept,
4557     // not applicable to arbitrary documents.
4558     initDNSPrefetch();
4559 }
4560 
4561 #if ENABLE(DATABASE)
4562 
allowDatabaseAccess() const4563 bool Document::allowDatabaseAccess() const
4564 {
4565     if (!page() || page()->settings()->privateBrowsingEnabled())
4566         return false;
4567     return true;
4568 }
4569 
databaseExceededQuota(const String & name)4570 void Document::databaseExceededQuota(const String& name)
4571 {
4572     Page* currentPage = page();
4573     if (currentPage)
4574         currentPage->chrome()->client()->exceededDatabaseQuota(document()->frame(), name);
4575 }
4576 
4577 #endif
4578 
isContextThread() const4579 bool Document::isContextThread() const
4580 {
4581     return isMainThread();
4582 }
4583 
updateURLForPushOrReplaceState(const KURL & url)4584 void Document::updateURLForPushOrReplaceState(const KURL& url)
4585 {
4586     Frame* f = frame();
4587     if (!f)
4588         return;
4589 
4590     setURL(url);
4591     f->loader()->setOutgoingReferrer(url);
4592 
4593     if (DocumentLoader* documentLoader = loader())
4594         documentLoader->replaceRequestURLForSameDocumentNavigation(url);
4595 }
4596 
statePopped(SerializedScriptValue * stateObject)4597 void Document::statePopped(SerializedScriptValue* stateObject)
4598 {
4599     if (!frame())
4600         return;
4601 
4602     // Per step 11 of section 6.5.9 (history traversal) of the HTML5 spec, we
4603     // defer firing of popstate until we're in the complete state.
4604     if (m_readyState == Complete)
4605         enqueuePopstateEvent(stateObject);
4606     else
4607         m_pendingStateObject = stateObject;
4608 }
4609 
updateFocusAppearanceSoon(bool restorePreviousSelection)4610 void Document::updateFocusAppearanceSoon(bool restorePreviousSelection)
4611 {
4612     m_updateFocusAppearanceRestoresSelection = restorePreviousSelection;
4613     if (!m_updateFocusAppearanceTimer.isActive())
4614         m_updateFocusAppearanceTimer.startOneShot(0);
4615 }
4616 
cancelFocusAppearanceUpdate()4617 void Document::cancelFocusAppearanceUpdate()
4618 {
4619     m_updateFocusAppearanceTimer.stop();
4620 }
4621 
updateFocusAppearanceTimerFired(Timer<Document> *)4622 void Document::updateFocusAppearanceTimerFired(Timer<Document>*)
4623 {
4624     Node* node = focusedNode();
4625     if (!node)
4626         return;
4627     if (!node->isElementNode())
4628         return;
4629 
4630     updateLayout();
4631 
4632     Element* element = static_cast<Element*>(node);
4633     if (element->isFocusable())
4634         element->updateFocusAppearance(m_updateFocusAppearanceRestoresSelection);
4635 }
4636 
4637 // FF method for accessing the selection added for compatibility.
getSelection() const4638 DOMSelection* Document::getSelection() const
4639 {
4640     return frame() ? frame()->domWindow()->getSelection() : 0;
4641 }
4642 
4643 #if ENABLE(WML)
resetWMLPageState()4644 void Document::resetWMLPageState()
4645 {
4646     if (WMLPageState* pageState = wmlPageStateForDocument(this))
4647         pageState->reset();
4648 }
4649 
initializeWMLPageState()4650 void Document::initializeWMLPageState()
4651 {
4652     if (!isWMLDocument())
4653         return;
4654 
4655     static_cast<WMLDocument*>(this)->initialize();
4656 }
4657 #endif
4658 
attachRange(Range * range)4659 void Document::attachRange(Range* range)
4660 {
4661     ASSERT(!m_ranges.contains(range));
4662     m_ranges.add(range);
4663 }
4664 
detachRange(Range * range)4665 void Document::detachRange(Range* range)
4666 {
4667     // We don't ASSERT m_ranges.contains(range) to allow us to call this
4668     // unconditionally to fix: https://bugs.webkit.org/show_bug.cgi?id=26044
4669     m_ranges.remove(range);
4670 }
4671 
getCSSCanvasContext(const String & type,const String & name,int width,int height)4672 CanvasRenderingContext* Document::getCSSCanvasContext(const String& type, const String& name, int width, int height)
4673 {
4674     HTMLCanvasElement* result = getCSSCanvasElement(name);
4675     if (!result)
4676         return 0;
4677     result->setSize(IntSize(width, height));
4678     return result->getContext(type);
4679 }
4680 
getCSSCanvasElement(const String & name)4681 HTMLCanvasElement* Document::getCSSCanvasElement(const String& name)
4682 {
4683     RefPtr<HTMLCanvasElement> result = m_cssCanvasElements.get(name).get();
4684     if (!result) {
4685         result = HTMLCanvasElement::create(this);
4686         m_cssCanvasElements.set(name, result);
4687     }
4688     return result.get();
4689 }
4690 
initDNSPrefetch()4691 void Document::initDNSPrefetch()
4692 {
4693     Settings* settings = this->settings();
4694 
4695     m_haveExplicitlyDisabledDNSPrefetch = false;
4696     m_isDNSPrefetchEnabled = settings && settings->dnsPrefetchingEnabled() && securityOrigin()->protocol() == "http";
4697 
4698     // Inherit DNS prefetch opt-out from parent frame
4699     if (Document* parent = parentDocument()) {
4700         if (!parent->isDNSPrefetchEnabled())
4701             m_isDNSPrefetchEnabled = false;
4702     }
4703 }
4704 
parseDNSPrefetchControlHeader(const String & dnsPrefetchControl)4705 void Document::parseDNSPrefetchControlHeader(const String& dnsPrefetchControl)
4706 {
4707     if (equalIgnoringCase(dnsPrefetchControl, "on") && !m_haveExplicitlyDisabledDNSPrefetch) {
4708         m_isDNSPrefetchEnabled = true;
4709         return;
4710     }
4711 
4712     m_isDNSPrefetchEnabled = false;
4713     m_haveExplicitlyDisabledDNSPrefetch = true;
4714 }
4715 
addMessage(MessageSource source,MessageType type,MessageLevel level,const String & message,unsigned lineNumber,const String & sourceURL,PassRefPtr<ScriptCallStack> callStack)4716 void Document::addMessage(MessageSource source, MessageType type, MessageLevel level, const String& message, unsigned lineNumber, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack)
4717 {
4718     if (DOMWindow* window = domWindow())
4719         window->console()->addMessage(source, type, level, message, lineNumber, sourceURL, callStack);
4720 }
4721 
4722 struct PerformTaskContext {
4723     WTF_MAKE_NONCOPYABLE(PerformTaskContext); WTF_MAKE_FAST_ALLOCATED;
4724 public:
PerformTaskContextWebCore::PerformTaskContext4725     PerformTaskContext(PassRefPtr<DocumentWeakReference> documentReference, PassOwnPtr<ScriptExecutionContext::Task> task)
4726         : documentReference(documentReference)
4727         , task(task)
4728     {
4729     }
4730 
4731     RefPtr<DocumentWeakReference> documentReference;
4732     OwnPtr<ScriptExecutionContext::Task> task;
4733 };
4734 
performTask(void * ctx)4735 static void performTask(void* ctx)
4736 {
4737     ASSERT(isMainThread());
4738 
4739     PerformTaskContext* context = reinterpret_cast<PerformTaskContext*>(ctx);
4740     ASSERT(context);
4741 
4742     if (Document* document = context->documentReference->document())
4743         context->task->performTask(document);
4744 
4745     delete context;
4746 }
4747 
postTask(PassOwnPtr<Task> task)4748 void Document::postTask(PassOwnPtr<Task> task)
4749 {
4750     callOnMainThread(performTask, new PerformTaskContext(m_weakReference, task));
4751 }
4752 
suspendScriptedAnimationControllerCallbacks()4753 void Document::suspendScriptedAnimationControllerCallbacks()
4754 {
4755 #if ENABLE(REQUEST_ANIMATION_FRAME)
4756     if (m_scriptedAnimationController)
4757         m_scriptedAnimationController->suspend();
4758 #endif
4759 }
4760 
resumeScriptedAnimationControllerCallbacks()4761 void Document::resumeScriptedAnimationControllerCallbacks()
4762 {
4763 #if ENABLE(REQUEST_ANIMATION_FRAME)
4764     if (m_scriptedAnimationController)
4765         m_scriptedAnimationController->resume();
4766 #endif
4767 }
4768 
displayStringModifiedByEncoding(const String & str) const4769 String Document::displayStringModifiedByEncoding(const String& str) const
4770 {
4771     if (m_decoder)
4772         return m_decoder->encoding().displayString(str.impl());
4773     return str;
4774 }
4775 
displayStringModifiedByEncoding(PassRefPtr<StringImpl> str) const4776 PassRefPtr<StringImpl> Document::displayStringModifiedByEncoding(PassRefPtr<StringImpl> str) const
4777 {
4778     if (m_decoder)
4779         return m_decoder->encoding().displayString(str);
4780     return str;
4781 }
4782 
displayBufferModifiedByEncoding(UChar * buffer,unsigned len) const4783 void Document::displayBufferModifiedByEncoding(UChar* buffer, unsigned len) const
4784 {
4785     if (m_decoder)
4786         m_decoder->encoding().displayBuffer(buffer, len);
4787 }
4788 
enqueuePageshowEvent(PageshowEventPersistence persisted)4789 void Document::enqueuePageshowEvent(PageshowEventPersistence persisted)
4790 {
4791     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=36334 Pageshow event needs to fire asynchronously.
4792     dispatchWindowEvent(PageTransitionEvent::create(eventNames().pageshowEvent, persisted), this);
4793 }
4794 
enqueueHashchangeEvent(const String & oldURL,const String & newURL)4795 void Document::enqueueHashchangeEvent(const String& oldURL, const String& newURL)
4796 {
4797     enqueueWindowEvent(HashChangeEvent::create(oldURL, newURL));
4798 }
4799 
enqueuePopstateEvent(PassRefPtr<SerializedScriptValue> stateObject)4800 void Document::enqueuePopstateEvent(PassRefPtr<SerializedScriptValue> stateObject)
4801 {
4802     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=36202 Popstate event needs to fire asynchronously
4803     dispatchWindowEvent(PopStateEvent::create(stateObject));
4804 }
4805 
addMediaCanStartListener(MediaCanStartListener * listener)4806 void Document::addMediaCanStartListener(MediaCanStartListener* listener)
4807 {
4808     ASSERT(!m_mediaCanStartListeners.contains(listener));
4809     m_mediaCanStartListeners.add(listener);
4810 }
4811 
removeMediaCanStartListener(MediaCanStartListener * listener)4812 void Document::removeMediaCanStartListener(MediaCanStartListener* listener)
4813 {
4814     ASSERT(m_mediaCanStartListeners.contains(listener));
4815     m_mediaCanStartListeners.remove(listener);
4816 }
4817 
takeAnyMediaCanStartListener()4818 MediaCanStartListener* Document::takeAnyMediaCanStartListener()
4819 {
4820     HashSet<MediaCanStartListener*>::iterator slot = m_mediaCanStartListeners.begin();
4821     if (slot == m_mediaCanStartListeners.end())
4822         return 0;
4823     MediaCanStartListener* listener = *slot;
4824     m_mediaCanStartListeners.remove(slot);
4825     return listener;
4826 }
4827 
4828 #if ENABLE(XHTMLMP)
isXHTMLMPDocument() const4829 bool Document::isXHTMLMPDocument() const
4830 {
4831     if (!frame() || !frame()->loader())
4832         return false;
4833     // As per section 7.2 of OMA-WAP-XHTMLMP-V1_1-20061020-A.pdf, a conforming user agent
4834     // MUST accept XHTMLMP document identified as "application/vnd.wap.xhtml+xml"
4835     // and SHOULD accept it identified as "application/xhtml+xml" , "application/xhtml+xml" is a
4836     // general MIME type for all XHTML documents, not only for XHTMLMP
4837     return loader()->writer()->mimeType() == "application/vnd.wap.xhtml+xml";
4838 }
4839 #endif
4840 
4841 #if ENABLE(FULLSCREEN_API)
fullScreenIsAllowedForElement(Element * element) const4842 bool Document::fullScreenIsAllowedForElement(Element* element) const
4843 {
4844     ASSERT(element);
4845     while (HTMLFrameOwnerElement* ownerElement = element->document()->ownerElement()) {
4846         if (!ownerElement->hasTagName(frameTag) && !ownerElement->hasTagName(iframeTag))
4847             continue;
4848 
4849         if (!static_cast<HTMLFrameElementBase*>(ownerElement)->allowFullScreen())
4850             return false;
4851         element = ownerElement;
4852     }
4853     return true;
4854 }
4855 
webkitRequestFullScreenForElement(Element * element,unsigned short flags)4856 void Document::webkitRequestFullScreenForElement(Element* element, unsigned short flags)
4857 {
4858     if (!page() || !page()->settings()->fullScreenEnabled())
4859         return;
4860 
4861     if (!element)
4862         element = documentElement();
4863 
4864     if (!fullScreenIsAllowedForElement(element))
4865         return;
4866 
4867     if (!ScriptController::processingUserGesture())
4868         return;
4869 
4870     if (!page()->chrome()->client()->supportsFullScreenForElement(element, flags & Element::ALLOW_KEYBOARD_INPUT))
4871         return;
4872 
4873     m_areKeysEnabledInFullScreen = flags & Element::ALLOW_KEYBOARD_INPUT;
4874     page()->chrome()->client()->enterFullScreenForElement(element);
4875 }
4876 
webkitCancelFullScreen()4877 void Document::webkitCancelFullScreen()
4878 {
4879     if (!page() || !m_fullScreenElement)
4880         return;
4881 
4882     page()->chrome()->client()->exitFullScreenForElement(m_fullScreenElement.get());
4883 #if PLATFORM(ANDROID)
4884     // The next time we try to enter full screen, we need this change to know
4885     // we are not in full screen any more.
4886     m_fullScreenElement = 0;
4887 #endif
4888 }
4889 
webkitWillEnterFullScreenForElement(Element * element)4890 void Document::webkitWillEnterFullScreenForElement(Element* element)
4891 {
4892     ASSERT(element);
4893     ASSERT(page() && page()->settings()->fullScreenEnabled());
4894 
4895     m_fullScreenElement = element;
4896 
4897 #if PLATFORM(ANDROID)
4898     // Our approach on Poster handling is android specific: we are passing the
4899     // poster from java side to native and we can't keep the content if the
4900     // video element is detached and its RenderLayer object is deleted.
4901     if(!(m_fullScreenElement->hasTagName(HTMLNames::videoTag))) {
4902 #endif
4903     if (m_fullScreenElement != documentElement())
4904         m_fullScreenElement->detach();
4905 
4906     recalcStyle(Force);
4907 #if PLATFORM(ANDROID)
4908     }
4909 #endif
4910 
4911     if (m_fullScreenRenderer) {
4912         m_fullScreenRenderer->setAnimating(true);
4913 #if USE(ACCELERATED_COMPOSITING)
4914         view()->updateCompositingLayers();
4915 #if PLATFORM(ANDROID)
4916         if (!m_fullScreenRenderer->layer())
4917             return;
4918 #endif
4919         if (m_fullScreenRenderer->layer()->isComposited())
4920             page()->chrome()->client()->setRootFullScreenLayer(m_fullScreenRenderer->layer()->backing()->graphicsLayer());
4921 #endif
4922     }
4923 }
4924 
webkitDidEnterFullScreenForElement(Element *)4925 void Document::webkitDidEnterFullScreenForElement(Element*)
4926 {
4927     if (m_fullScreenRenderer) {
4928         m_fullScreenRenderer->setAnimating(false);
4929 #if USE(ACCELERATED_COMPOSITING)
4930         view()->updateCompositingLayers();
4931         page()->chrome()->client()->setRootFullScreenLayer(0);
4932 #endif
4933     }
4934     m_fullScreenChangeDelayTimer.startOneShot(0);
4935 }
4936 
webkitWillExitFullScreenForElement(Element *)4937 void Document::webkitWillExitFullScreenForElement(Element*)
4938 {
4939     if (m_fullScreenRenderer) {
4940         m_fullScreenRenderer->setAnimating(true);
4941 #if USE(ACCELERATED_COMPOSITING)
4942         view()->updateCompositingLayers();
4943         if (m_fullScreenRenderer->layer()->isComposited())
4944             page()->chrome()->client()->setRootFullScreenLayer(m_fullScreenRenderer->layer()->backing()->graphicsLayer());
4945 #endif
4946     }
4947 }
4948 
webkitDidExitFullScreenForElement(Element *)4949 void Document::webkitDidExitFullScreenForElement(Element*)
4950 {
4951     m_areKeysEnabledInFullScreen = false;
4952 
4953     if (m_fullScreenRenderer)
4954         m_fullScreenRenderer->remove();
4955 
4956     if (m_fullScreenElement != documentElement())
4957         m_fullScreenElement->detach();
4958 
4959     m_fullScreenElement = 0;
4960     setFullScreenRenderer(0);
4961 #if USE(ACCELERATED_COMPOSITING)
4962     page()->chrome()->client()->setRootFullScreenLayer(0);
4963 #endif
4964     recalcStyle(Force);
4965 
4966     m_fullScreenChangeDelayTimer.startOneShot(0);
4967 }
4968 
setFullScreenRenderer(RenderFullScreen * renderer)4969 void Document::setFullScreenRenderer(RenderFullScreen* renderer)
4970 {
4971     if (renderer == m_fullScreenRenderer)
4972         return;
4973 
4974     if (m_fullScreenRenderer)
4975         m_fullScreenRenderer->destroy();
4976     m_fullScreenRenderer = renderer;
4977 
4978     // This notification can come in after the page has been destroyed.
4979     if (page())
4980         page()->chrome()->client()->fullScreenRendererChanged(m_fullScreenRenderer);
4981 }
4982 
setFullScreenRendererSize(const IntSize & size)4983 void Document::setFullScreenRendererSize(const IntSize& size)
4984 {
4985     ASSERT(m_fullScreenRenderer);
4986     if (!m_fullScreenRenderer)
4987         return;
4988 
4989     if (m_fullScreenRenderer) {
4990         RefPtr<RenderStyle> newStyle = RenderStyle::clone(m_fullScreenRenderer->style());
4991         newStyle->setWidth(Length(size.width(), WebCore::Fixed));
4992         newStyle->setHeight(Length(size.height(), WebCore::Fixed));
4993         newStyle->setTop(Length(0, WebCore::Fixed));
4994         newStyle->setLeft(Length(0, WebCore::Fixed));
4995         m_fullScreenRenderer->setStyle(newStyle);
4996         updateLayout();
4997     }
4998 }
4999 
setFullScreenRendererBackgroundColor(Color backgroundColor)5000 void Document::setFullScreenRendererBackgroundColor(Color backgroundColor)
5001 {
5002     if (!m_fullScreenRenderer)
5003         return;
5004 
5005     RefPtr<RenderStyle> newStyle = RenderStyle::clone(m_fullScreenRenderer->style());
5006     newStyle->setBackgroundColor(backgroundColor);
5007     m_fullScreenRenderer->setStyle(newStyle);
5008 }
5009 
fullScreenChangeDelayTimerFired(Timer<Document> *)5010 void Document::fullScreenChangeDelayTimerFired(Timer<Document>*)
5011 {
5012     Element* element = m_fullScreenElement.get();
5013     if (!element)
5014         element = documentElement();
5015 
5016     element->dispatchEvent(Event::create(eventNames().webkitfullscreenchangeEvent, true, false));
5017 }
5018 
5019 #endif
5020 
decrementLoadEventDelayCount()5021 void Document::decrementLoadEventDelayCount()
5022 {
5023     ASSERT(m_loadEventDelayCount);
5024     --m_loadEventDelayCount;
5025 
5026     if (frame() && !m_loadEventDelayCount && !m_loadEventDelayTimer.isActive())
5027         m_loadEventDelayTimer.startOneShot(0);
5028 }
5029 
loadEventDelayTimerFired(Timer<Document> *)5030 void Document::loadEventDelayTimerFired(Timer<Document>*)
5031 {
5032     if (frame())
5033         frame()->loader()->checkCompleted();
5034 }
5035 
5036 #if ENABLE(REQUEST_ANIMATION_FRAME)
webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback> callback,Element * animationElement)5037 int Document::webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback> callback, Element* animationElement)
5038 {
5039     if (!m_scriptedAnimationController)
5040         m_scriptedAnimationController = ScriptedAnimationController::create(this);
5041 
5042     return m_scriptedAnimationController->registerCallback(callback, animationElement);
5043 }
5044 
webkitCancelRequestAnimationFrame(int id)5045 void Document::webkitCancelRequestAnimationFrame(int id)
5046 {
5047     if (!m_scriptedAnimationController)
5048         return;
5049     m_scriptedAnimationController->cancelCallback(id);
5050 }
5051 
serviceScriptedAnimations(DOMTimeStamp time)5052 void Document::serviceScriptedAnimations(DOMTimeStamp time)
5053 {
5054     if (!m_scriptedAnimationController)
5055         return;
5056     m_scriptedAnimationController->serviceScriptedAnimations(time);
5057 }
5058 #endif
5059 
5060 #if ENABLE(TOUCH_EVENTS)
createTouch(DOMWindow * window,EventTarget * target,int identifier,int pageX,int pageY,int screenX,int screenY,ExceptionCode &) const5061 PassRefPtr<Touch> Document::createTouch(DOMWindow* window, EventTarget* target, int identifier, int pageX, int pageY, int screenX, int screenY, ExceptionCode&) const
5062 {
5063     // FIXME: It's not clear from the documentation at
5064     // http://developer.apple.com/library/safari/#documentation/UserExperience/Reference/DocumentAdditionsReference/DocumentAdditions/DocumentAdditions.html
5065     // 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
5066     // and implement them here. See https://bugs.webkit.org/show_bug.cgi?id=47819
5067     Frame* frame = window ? window->frame() : this->frame();
5068     return Touch::create(frame, target, identifier, screenX, screenY, pageX, pageY);
5069 }
5070 #endif
5071 
loader() const5072 DocumentLoader* Document::loader() const
5073 {
5074     if (!m_frame)
5075         return 0;
5076 
5077     DocumentLoader* loader = m_frame->loader()->activeDocumentLoader();
5078     if (!loader)
5079         return 0;
5080 
5081 #if PLATFORM(ANDROID)
5082     // Temporary hack for http://b/5188895
5083     bool isDocumentUpToDate = m_frame->isDocumentUpToDate();
5084 #else
5085     bool isDocumentUpToDate = true;
5086 #endif
5087     if (isDocumentUpToDate && m_frame->document() != this)
5088         return 0;
5089 
5090     return loader;
5091 }
5092 
5093 } // namespace WebCore
5094