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Document.cpp
6301 lines (5246 loc) · 207 KB
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Document.cpp
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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* (C) 2006 Alexey Proskuryakov (ap@webkit.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012, 2013 Apple Inc. All rights reserved.
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "Document.h"
#include "AXObjectCache.h"
#include "AnimationController.h"
#include "Attr.h"
#include "AudioProducer.h"
#include "CDATASection.h"
#include "CSSStyleDeclaration.h"
#include "CSSStyleSheet.h"
#include "CachedCSSStyleSheet.h"
#include "CachedResourceLoader.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "Comment.h"
#include "ContentSecurityPolicy.h"
#include "CookieJar.h"
#include "DOMImplementation.h"
#include "DOMNamedFlowCollection.h"
#include "DOMWindow.h"
#include "DateComponents.h"
#include "Dictionary.h"
#include "DocumentLoader.h"
#include "DocumentMarkerController.h"
#include "DocumentSharedObjectPool.h"
#include "DocumentType.h"
#include "Editor.h"
#include "ElementIterator.h"
#include "EntityReference.h"
#include "EventFactory.h"
#include "EventHandler.h"
#include "FocusController.h"
#include "FontLoader.h"
#include "FormController.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameView.h"
#include "HTMLAllCollection.h"
#include "HTMLAnchorElement.h"
#include "HTMLBaseElement.h"
#include "HTMLBodyElement.h"
#include "HTMLCanvasElement.h"
#include "HTMLCollection.h"
#include "HTMLDocument.h"
#include "HTMLElementFactory.h"
#include "HTMLFormControlElement.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLFrameSetElement.h"
#include "HTMLHeadElement.h"
#include "HTMLIFrameElement.h"
#include "HTMLImageElement.h"
#include "HTMLLinkElement.h"
#include "HTMLMediaElement.h"
#include "HTMLNameCollection.h"
#include "HTMLParserIdioms.h"
#include "HTMLPlugInElement.h"
#include "HTMLScriptElement.h"
#include "HTMLStyleElement.h"
#include "HTMLTitleElement.h"
#include "HTTPHeaderNames.h"
#include "HTTPParsers.h"
#include "HashChangeEvent.h"
#include "History.h"
#include "HitTestResult.h"
#include "IconController.h"
#include "ImageLoader.h"
#include "InspectorInstrumentation.h"
#include "JSLazyEventListener.h"
#include "Language.h"
#include "LoaderStrategy.h"
#include "Logging.h"
#include "MainFrame.h"
#include "MediaCanStartListener.h"
#include "MediaQueryList.h"
#include "MediaQueryMatcher.h"
#include "MouseEventWithHitTestResults.h"
#include "NameNodeList.h"
#include "NestingLevelIncrementer.h"
#include "NodeIterator.h"
#include "NodeRareData.h"
#include "NodeWithIndex.h"
#include "PageConsoleClient.h"
#include "PageGroup.h"
#include "PageTransitionEvent.h"
#include "PlatformLocale.h"
#include "PlatformStrategies.h"
#include "PlugInsResources.h"
#include "PluginDocument.h"
#include "PointerLockController.h"
#include "PopStateEvent.h"
#include "ProcessingInstruction.h"
#include "RenderChildIterator.h"
#include "RenderLayerCompositor.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "ResourceLoadScheduler.h"
#include "ResourceLoader.h"
#include "RuntimeEnabledFeatures.h"
#include "SVGDocumentExtensions.h"
#include "SVGElementFactory.h"
#include "SVGNames.h"
#include "SVGSVGElement.h"
#include "SchemeRegistry.h"
#include "ScopedEventQueue.h"
#include "ScriptController.h"
#include "ScriptRunner.h"
#include "ScriptSourceCode.h"
#include "ScrollingCoordinator.h"
#include "SecurityOrigin.h"
#include "SecurityOriginPolicy.h"
#include "SecurityPolicy.h"
#include "SegmentedString.h"
#include "SelectorQuery.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "StyleProperties.h"
#include "StyleResolver.h"
#include "StyleSheetContents.h"
#include "StyleSheetList.h"
#include "TextResourceDecoder.h"
#include "TransformSource.h"
#include "TreeWalker.h"
#include "VisitedLinkState.h"
#include "XMLDocumentParser.h"
#include "XMLNSNames.h"
#include "XMLNames.h"
#include "XPathEvaluator.h"
#include "XPathExpression.h"
#include "XPathNSResolver.h"
#include "XPathResult.h"
#include "htmlediting.h"
#include <inspector/ScriptCallStack.h>
#include <wtf/CurrentTime.h>
#include <wtf/TemporaryChange.h>
#include <wtf/text/StringBuffer.h>
#include <yarr/RegularExpression.h>
#if ENABLE(SHARED_WORKERS)
#include "SharedWorkerRepository.h"
#endif
#if ENABLE(XSLT)
#include "XSLTProcessor.h"
#endif
#if ENABLE(TOUCH_EVENTS)
#include "TouchList.h"
#endif
#if PLATFORM(IOS)
#include "CSSFontSelector.h"
#include "DeviceMotionClientIOS.h"
#include "DeviceMotionController.h"
#include "DeviceOrientationClientIOS.h"
#include "DeviceOrientationController.h"
#include "Geolocation.h"
#include "Navigator.h"
#include "NavigatorGeolocation.h"
#include "WKContentObservation.h"
#include "WebCoreSystemInterface.h"
#endif
#if ENABLE(IOS_GESTURE_EVENTS)
#include "GestureEvent.h"
#endif
#if ENABLE(MATHML)
#include "MathMLElement.h"
#include "MathMLElementFactory.h"
#include "MathMLNames.h"
#endif
#if ENABLE(FULLSCREEN_API)
#include "RenderFullScreen.h"
#endif
#if ENABLE(REQUEST_ANIMATION_FRAME)
#include "RequestAnimationFrameCallback.h"
#include "ScriptedAnimationController.h"
#endif
#if ENABLE(IOS_TEXT_AUTOSIZING)
#include "TextAutoSizing.h"
#endif
#if ENABLE(TEXT_AUTOSIZING)
#include "TextAutosizer.h"
#endif
#if ENABLE(CSP_NEXT)
#include "DOMSecurityPolicy.h"
#endif
#if ENABLE(VIDEO_TRACK)
#include "CaptionUserPreferences.h"
#endif
#if ENABLE(WEB_REPLAY)
#include "WebReplayInputs.h"
#include <replay/EmptyInputCursor.h>
#include <replay/InputCursor.h>
#endif
using namespace WTF;
using namespace Unicode;
namespace WebCore {
using namespace HTMLNames;
// #define INSTRUMENT_LAYOUT_SCHEDULING 1
static const unsigned cMaxWriteRecursionDepth = 21;
// DOM Level 2 says (letters added):
//
// a) Name start characters must have one of the categories Ll, Lu, Lo, Lt, Nl.
// b) Name characters other than Name-start characters must have one of the categories Mc, Me, Mn, Lm, or Nd.
// c) Characters in the compatibility area (i.e. with character code greater than #xF900 and less than #xFFFE) are not allowed in XML names.
// 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.
// 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.
// f) Characters #x20DD-#x20E0 are excluded (in accordance with Unicode, section 5.14).
// g) Character #x00B7 is classified as an extender, because the property list so identifies it.
// h) Character #x0387 is added as a name character, because #x00B7 is its canonical equivalent.
// i) Characters ':' and '_' are allowed as name-start characters.
// j) Characters '-' and '.' are allowed as name characters.
//
// It also contains complete tables. If we decide it's better, we could include those instead of the following code.
static inline bool isValidNameStart(UChar32 c)
{
// rule (e) above
if ((c >= 0x02BB && c <= 0x02C1) || c == 0x559 || c == 0x6E5 || c == 0x6E6)
return true;
// rule (i) above
if (c == ':' || c == '_')
return true;
// rules (a) and (f) above
if (!(U_GET_GC_MASK(c) & (U_GC_LL_MASK | U_GC_LU_MASK | U_GC_LO_MASK | U_GC_LT_MASK | U_GC_NL_MASK)))
return false;
// rule (c) above
if (c >= 0xF900 && c < 0xFFFE)
return false;
// rule (d) above
int type = u_getIntPropertyValue(c, UCHAR_DECOMPOSITION_TYPE);
if (type == U_DT_FONT || type == U_DT_COMPAT)
return false;
return true;
}
static inline bool isValidNamePart(UChar32 c)
{
// rules (a), (e), and (i) above
if (isValidNameStart(c))
return true;
// rules (g) and (h) above
if (c == 0x00B7 || c == 0x0387)
return true;
// rule (j) above
if (c == '-' || c == '.')
return true;
// rules (b) and (f) above
if (!(U_GET_GC_MASK(c) & (U_GC_M_MASK | U_GC_LM_MASK | U_GC_ND_MASK)))
return false;
// rule (c) above
if (c >= 0xF900 && c < 0xFFFE)
return false;
// rule (d) above
int type = u_getIntPropertyValue(c, UCHAR_DECOMPOSITION_TYPE);
if (type == U_DT_FONT || type == U_DT_COMPAT)
return false;
return true;
}
static bool shouldInheritSecurityOriginFromOwner(const URL& url)
{
// http://www.whatwg.org/specs/web-apps/current-work/#origin-0
//
// If a Document has the address "about:blank"
// The origin of the Document is the origin it was assigned when its browsing context was created.
//
// Note: We generalize this to all "blank" URLs and invalid URLs because we
// treat all of these URLs as about:blank.
//
return url.isEmpty() || url.isBlankURL();
}
static Widget* widgetForElement(Element* focusedElement)
{
if (!focusedElement)
return nullptr;
auto* renderer = focusedElement->renderer();
if (!is<RenderWidget>(renderer))
return nullptr;
return downcast<RenderWidget>(*renderer).widget();
}
static bool acceptsEditingFocus(Node* node)
{
ASSERT(node);
ASSERT(node->hasEditableStyle());
Node* root = node->rootEditableElement();
Frame* frame = node->document().frame();
if (!frame || !root)
return false;
return frame->editor().shouldBeginEditing(rangeOfContents(*root).ptr());
}
static bool canAccessAncestor(const SecurityOrigin* activeSecurityOrigin, Frame* targetFrame)
{
// targetFrame can be 0 when we're trying to navigate a top-level frame
// that has a 0 opener.
if (!targetFrame)
return false;
const bool isLocalActiveOrigin = activeSecurityOrigin->isLocal();
for (Frame* ancestorFrame = targetFrame; ancestorFrame; ancestorFrame = ancestorFrame->tree().parent()) {
Document* ancestorDocument = ancestorFrame->document();
// FIXME: Should be an ASSERT? Frames should alway have documents.
if (!ancestorDocument)
return true;
const SecurityOrigin* ancestorSecurityOrigin = ancestorDocument->securityOrigin();
if (activeSecurityOrigin->canAccess(ancestorSecurityOrigin))
return true;
// Allow file URL descendant navigation even when allowFileAccessFromFileURLs is false.
// FIXME: It's a bit strange to special-case local origins here. Should we be doing
// something more general instead?
if (isLocalActiveOrigin && ancestorSecurityOrigin->isLocal())
return true;
}
return false;
}
static void printNavigationErrorMessage(Frame* frame, const URL& activeURL, const char* reason)
{
String message = "Unsafe JavaScript attempt to initiate navigation for frame with URL '" + frame->document()->url().string() + "' from frame with URL '" + activeURL.string() + "'. " + reason + "\n";
// FIXME: should we print to the console of the document performing the navigation instead?
frame->document()->domWindow()->printErrorMessage(message);
}
uint64_t Document::s_globalTreeVersion = 0;
#if ENABLE(IOS_TEXT_AUTOSIZING)
void TextAutoSizingTraits::constructDeletedValue(TextAutoSizingKey& slot)
{
new (&slot) TextAutoSizingKey(TextAutoSizingKey::deletedKeyStyle(), TextAutoSizingKey::deletedKeyDoc());
}
bool TextAutoSizingTraits::isDeletedValue(const TextAutoSizingKey& value)
{
return value.style() == TextAutoSizingKey::deletedKeyStyle() && value.doc() == TextAutoSizingKey::deletedKeyDoc();
}
#endif
HashSet<Document*>& Document::allDocuments()
{
static NeverDestroyed<HashSet<Document*>> documents;
return documents;
}
Document::Document(Frame* frame, const URL& url, unsigned documentClasses, unsigned constructionFlags)
: ContainerNode(*this, CreateDocument)
, TreeScope(*this)
#if ENABLE(IOS_TOUCH_EVENTS)
, m_handlingTouchEvent(false)
, m_touchEventRegionsDirty(false)
, m_touchEventsChangedTimer(*this, &Document::touchEventsChangedTimerFired)
#endif
, m_referencingNodeCount(0)
, m_didCalculateStyleResolver(false)
, m_hasNodesWithPlaceholderStyle(false)
, m_needsNotifyRemoveAllPendingStylesheet(false)
, m_ignorePendingStylesheets(false)
, m_pendingSheetLayout(NoLayoutWithPendingSheets)
, m_frame(frame)
, m_activeParserCount(0)
, m_wellFormed(false)
, m_printing(false)
, m_paginatedForScreen(false)
, m_compatibilityMode(DocumentCompatibilityMode::NoQuirksMode)
, m_compatibilityModeLocked(false)
, m_textColor(Color::black)
, m_domTreeVersion(++s_globalTreeVersion)
, m_listenerTypes(0)
, m_mutationObserverTypes(0)
, m_styleSheetCollection(*this)
, m_visitedLinkState(std::make_unique<VisitedLinkState>(*this))
, m_visuallyOrdered(false)
, m_readyState(Complete)
, m_bParsing(false)
, m_optimizedStyleSheetUpdateTimer(*this, &Document::optimizedStyleSheetUpdateTimerFired)
, m_styleRecalcTimer(*this, &Document::styleRecalcTimerFired)
, m_pendingStyleRecalcShouldForce(false)
, m_inStyleRecalc(false)
, m_closeAfterStyleRecalc(false)
, m_gotoAnchorNeededAfterStylesheetsLoad(false)
, m_frameElementsShouldIgnoreScrolling(false)
, m_updateFocusAppearanceRestoresSelection(false)
, m_ignoreDestructiveWriteCount(0)
, m_titleSetExplicitly(false)
, m_markers(std::make_unique<DocumentMarkerController>())
, m_updateFocusAppearanceTimer(*this, &Document::updateFocusAppearanceTimerFired)
, m_cssTarget(nullptr)
, m_processingLoadEvent(false)
, m_loadEventFinished(false)
, m_startTime(std::chrono::steady_clock::now())
, m_overMinimumLayoutThreshold(false)
, m_scriptRunner(std::make_unique<ScriptRunner>(*this))
, m_xmlVersion(ASCIILiteral("1.0"))
, m_xmlStandalone(StandaloneUnspecified)
, m_hasXMLDeclaration(false)
, m_designMode(inherit)
#if !ASSERT_DISABLED
, m_inInvalidateNodeListAndCollectionCaches(false)
#endif
#if ENABLE(DASHBOARD_SUPPORT)
, m_hasAnnotatedRegions(false)
, m_annotatedRegionsDirty(false)
#endif
, m_createRenderers(true)
, m_inPageCache(false)
, m_accessKeyMapValid(false)
, m_documentClasses(documentClasses)
, m_isSynthesized(constructionFlags & Synthesized)
, m_isNonRenderedPlaceholder(constructionFlags & NonRenderedPlaceholder)
, m_sawElementsInKnownNamespaces(false)
, m_isSrcdocDocument(false)
, m_eventQueue(*this)
, m_weakFactory(this)
#if ENABLE(FULLSCREEN_API)
, m_areKeysEnabledInFullScreen(0)
, m_fullScreenRenderer(nullptr)
, m_fullScreenChangeDelayTimer(*this, &Document::fullScreenChangeDelayTimerFired)
, m_isAnimatingFullScreen(false)
#endif
, m_loadEventDelayCount(0)
, m_loadEventDelayTimer(*this, &Document::loadEventDelayTimerFired)
, m_referrerPolicy(ReferrerPolicyDefault)
, m_directionSetOnDocumentElement(false)
, m_writingModeSetOnDocumentElement(false)
, m_writeRecursionIsTooDeep(false)
, m_writeRecursionDepth(0)
, m_wheelEventHandlerCount(0)
, m_lastHandledUserGestureTimestamp(0)
#if PLATFORM(IOS)
#if ENABLE(DEVICE_ORIENTATION)
, m_deviceMotionClient(std::make_unique<DeviceMotionClientIOS>())
, m_deviceMotionController(std::make_unique<DeviceMotionController>(m_deviceMotionClient.get()))
, m_deviceOrientationClient(std::make_unique<DeviceOrientationClientIOS>())
, m_deviceOrientationController(std::make_unique<DeviceOrientationController>(m_deviceOrientationClient.get()))
#endif
#endif
#if ENABLE(TELEPHONE_NUMBER_DETECTION)
, m_isTelephoneNumberParsingAllowed(true)
#endif
, m_pendingTasksTimer(*this, &Document::pendingTasksTimerFired)
, m_scheduledTasksAreSuspended(false)
, m_visualUpdatesAllowed(true)
, m_visualUpdatesSuppressionTimer(*this, &Document::visualUpdatesSuppressionTimerFired)
, m_sharedObjectPoolClearTimer(*this, &Document::sharedObjectPoolClearTimerFired)
#ifndef NDEBUG
, m_didDispatchViewportPropertiesChanged(false)
#endif
#if ENABLE(TEMPLATE_ELEMENT)
, m_templateDocumentHost(nullptr)
#endif
#if ENABLE(WEB_REPLAY)
, m_inputCursor(EmptyInputCursor::create())
#endif
, m_didAssociateFormControlsTimer(*this, &Document::didAssociateFormControlsTimerFired)
, m_cookieCacheExpiryTimer(*this, &Document::domCookieCacheExpiryTimerFired)
, m_disabledFieldsetElementsCount(0)
, m_hasInjectedPlugInsScript(false)
, m_renderTreeBeingDestroyed(false)
, m_hasPreparedForDestruction(false)
, m_hasStyleWithViewportUnits(false)
, m_isPlayingAudio(false)
{
allDocuments().add(this);
// We depend on the url getting immediately set in subframes, but we
// also depend on the url NOT getting immediately set in opened windows.
// See fast/dom/early-frame-url.html
// and fast/dom/location-new-window-no-crash.html, respectively.
// FIXME: Can/should we unify this behavior?
if ((frame && frame->ownerElement()) || !url.isEmpty())
setURL(url);
if (m_frame)
m_cachedResourceLoader = &m_frame->loader().activeDocumentLoader()->cachedResourceLoader();
if (!m_cachedResourceLoader)
m_cachedResourceLoader = CachedResourceLoader::create(nullptr);
m_cachedResourceLoader->setDocument(this);
#if ENABLE(TEXT_AUTOSIZING)
m_textAutosizer = std::make_unique<TextAutosizer>(this);
#endif
resetLinkColor();
resetVisitedLinkColor();
resetActiveLinkColor();
initSecurityContext();
initDNSPrefetch();
for (unsigned i = 0; i < WTF_ARRAY_LENGTH(m_nodeListAndCollectionCounts); ++i)
m_nodeListAndCollectionCounts[i] = 0;
}
#if ENABLE(FULLSCREEN_API)
static bool isAttributeOnAllOwners(const WebCore::QualifiedName& attribute, const WebCore::QualifiedName& prefixedAttribute, const HTMLFrameOwnerElement* owner)
{
if (!owner)
return true;
do {
if (!(owner->hasAttribute(attribute) || owner->hasAttribute(prefixedAttribute)))
return false;
} while ((owner = owner->document().ownerElement()));
return true;
}
#endif
Ref<Document> Document::create(ScriptExecutionContext& context)
{
Ref<Document> document = adoptRef(*new Document(nullptr, URL()));
document->setSecurityOriginPolicy(context.securityOriginPolicy());
return document;
}
Document::~Document()
{
allDocuments().remove(this);
ASSERT(!renderView());
ASSERT(!m_inPageCache);
ASSERT(m_ranges.isEmpty());
ASSERT(!m_parentTreeScope);
ASSERT(!m_disabledFieldsetElementsCount);
#if ENABLE(DEVICE_ORIENTATION) && PLATFORM(IOS)
m_deviceMotionClient->deviceMotionControllerDestroyed();
m_deviceOrientationClient->deviceOrientationControllerDestroyed();
#endif
#if ENABLE(TEMPLATE_ELEMENT)
if (m_templateDocument)
m_templateDocument->setTemplateDocumentHost(nullptr); // balanced in templateDocument().
#endif
// FIXME: Should we reset m_domWindow when we detach from the Frame?
if (m_domWindow)
m_domWindow->resetUnlessSuspendedForPageCache();
m_scriptRunner = nullptr;
removeAllEventListeners();
// Currently we believe that Document can never outlive the parser.
// Although the Document may be replaced synchronously, DocumentParsers
// generally keep at least one reference to an Element which would in turn
// has a reference to the Document. If you hit this ASSERT, then that
// assumption is wrong. DocumentParser::detach() should ensure that even
// if the DocumentParser outlives the Document it won't cause badness.
ASSERT(!m_parser || m_parser->refCount() == 1);
detachParser();
if (this == &topDocument())
clearAXObjectCache();
m_decoder = nullptr;
if (m_styleSheetList)
m_styleSheetList->detachFromDocument();
if (m_elementSheet)
m_elementSheet->detachFromDocument();
m_styleSheetCollection.detachFromDocument();
clearStyleResolver(); // We need to destroy CSSFontSelector before destroying m_cachedResourceLoader.
// It's possible for multiple Documents to end up referencing the same CachedResourceLoader (e.g., SVGImages
// load the initial empty document and the SVGDocument with the same DocumentLoader).
if (m_cachedResourceLoader->document() == this)
m_cachedResourceLoader->setDocument(nullptr);
m_cachedResourceLoader.clear();
// We must call clearRareData() here since a Document class inherits TreeScope
// as well as Node. See a comment on TreeScope.h for the reason.
if (hasRareData())
clearRareData();
ASSERT(!m_listsInvalidatedAtDocument.size());
ASSERT(!m_collectionsInvalidatedAtDocument.size());
for (unsigned i = 0; i < WTF_ARRAY_LENGTH(m_nodeListAndCollectionCounts); ++i)
ASSERT(!m_nodeListAndCollectionCounts[i]);
}
void Document::removedLastRef()
{
ASSERT(!m_deletionHasBegun);
if (m_referencingNodeCount) {
// If removing a child removes the last node reference, we don't want the scope to be destroyed
// until after removeDetachedChildren returns, so we protect ourselves.
incrementReferencingNodeCount();
// We must make sure not to be retaining any of our children through
// these extra pointers or we will create a reference cycle.
m_focusedElement = nullptr;
m_hoveredElement = nullptr;
m_activeElement = nullptr;
m_titleElement = nullptr;
m_documentElement = nullptr;
m_userActionElements.documentDidRemoveLastRef();
#if ENABLE(FULLSCREEN_API)
m_fullScreenElement = nullptr;
m_fullScreenElementStack.clear();
#endif
detachParser();
// removeDetachedChildren() doesn't always unregister IDs,
// so tear down scope information up front to avoid having
// stale references in the map.
destroyTreeScopeData();
removeDetachedChildren();
m_formController = nullptr;
m_markers->detach();
m_cssCanvasElements.clear();
commonTeardown();
#ifndef NDEBUG
// We need to do this right now since selfOnlyDeref() can delete this.
m_inRemovedLastRefFunction = false;
#endif
decrementReferencingNodeCount();
} else {
#ifndef NDEBUG
m_inRemovedLastRefFunction = false;
m_deletionHasBegun = true;
#endif
delete this;
}
}
void Document::commonTeardown()
{
if (svgExtensions())
accessSVGExtensions().pauseAnimations();
#if ENABLE(REQUEST_ANIMATION_FRAME)
clearScriptedAnimationController();
#endif
}
Element* Document::getElementByAccessKey(const String& key)
{
if (key.isEmpty())
return nullptr;
if (!m_accessKeyMapValid) {
buildAccessKeyMap(this);
m_accessKeyMapValid = true;
}
return m_elementsByAccessKey.get(key.impl());
}
void Document::buildAccessKeyMap(TreeScope* scope)
{
ASSERT(scope);
for (auto& element : descendantsOfType<Element>(scope->rootNode())) {
const AtomicString& accessKey = element.fastGetAttribute(accesskeyAttr);
if (!accessKey.isEmpty())
m_elementsByAccessKey.set(accessKey.impl(), &element);
if (ShadowRoot* root = element.shadowRoot())
buildAccessKeyMap(root);
}
}
void Document::invalidateAccessKeyMap()
{
m_accessKeyMapValid = false;
m_elementsByAccessKey.clear();
}
void Document::addImageElementByLowercasedUsemap(const AtomicStringImpl& name, HTMLImageElement& element)
{
return m_imagesByUsemap.add(name, element, *this);
}
void Document::removeImageElementByLowercasedUsemap(const AtomicStringImpl& name, HTMLImageElement& element)
{
return m_imagesByUsemap.remove(name, element);
}
HTMLImageElement* Document::imageElementByLowercasedUsemap(const AtomicStringImpl& name) const
{
return m_imagesByUsemap.getElementByLowercasedUsemap(name, *this);
}
SelectorQuery* Document::selectorQueryForString(const String& selectorString, ExceptionCode& ec)
{
if (selectorString.isEmpty()) {
ec = SYNTAX_ERR;
return nullptr;
}
if (!m_selectorQueryCache)
m_selectorQueryCache = std::make_unique<SelectorQueryCache>();
return m_selectorQueryCache->add(selectorString, *this, ec);
}
void Document::clearSelectorQueryCache()
{
m_selectorQueryCache = nullptr;
}
MediaQueryMatcher& Document::mediaQueryMatcher()
{
if (!m_mediaQueryMatcher)
m_mediaQueryMatcher = MediaQueryMatcher::create(this);
return *m_mediaQueryMatcher;
}
void Document::setCompatibilityMode(DocumentCompatibilityMode mode)
{
if (m_compatibilityModeLocked || mode == m_compatibilityMode)
return;
bool wasInQuirksMode = inQuirksMode();
m_compatibilityMode = mode;
clearSelectorQueryCache();
if (inQuirksMode() != wasInQuirksMode) {
// All user stylesheets have to reparse using the different mode.
m_styleSheetCollection.clearPageUserSheet();
m_styleSheetCollection.invalidateInjectedStyleSheetCache();
}
}
String Document::compatMode() const
{
return inQuirksMode() ? "BackCompat" : "CSS1Compat";
}
void Document::resetLinkColor()
{
m_linkColor = Color(0, 0, 238);
}
void Document::resetVisitedLinkColor()
{
m_visitedLinkColor = Color(85, 26, 139);
}
void Document::resetActiveLinkColor()
{
m_activeLinkColor.setNamedColor("red");
}
DOMImplementation& Document::implementation()
{
if (!m_implementation)
m_implementation = std::make_unique<DOMImplementation>(*this);
return *m_implementation;
}
bool Document::hasManifest() const
{
return documentElement() && documentElement()->hasTagName(htmlTag) && documentElement()->fastHasAttribute(manifestAttr);
}
DocumentType* Document::doctype() const
{
for (Node* node = firstChild(); node; node = node->nextSibling()) {
if (node->isDocumentTypeNode())
return static_cast<DocumentType*>(node);
}
return nullptr;
}
void Document::childrenChanged(const ChildChange& change)
{
ContainerNode::childrenChanged(change);
#if PLATFORM(IOS)
// FIXME: Chrome::didReceiveDocType() used to be called only when the doctype changed. We need to check the
// impact of calling this systematically. If the overhead is negligible, we need to rename didReceiveDocType,
// otherwise, we need to detect the doc type changes before updating the viewport.
if (Page* page = this->page())
page->chrome().didReceiveDocType(frame());
#endif
Element* newDocumentElement = childrenOfType<Element>(*this).first();
if (newDocumentElement == m_documentElement)
return;
m_documentElement = newDocumentElement;
// The root style used for media query matching depends on the document element.
clearStyleResolver();
}
RefPtr<Element> Document::createElement(const AtomicString& name, ExceptionCode& ec)
{
if (!isValidName(name)) {
ec = INVALID_CHARACTER_ERR;
return nullptr;
}
if (isXHTMLDocument())
return HTMLElementFactory::createElement(QualifiedName(nullAtom, name, xhtmlNamespaceURI), *this);
return createElement(QualifiedName(nullAtom, name, nullAtom), false);
}
Ref<DocumentFragment> Document::createDocumentFragment()
{
return DocumentFragment::create(document());
}
Ref<Text> Document::createTextNode(const String& data)
{
return Text::create(*this, data);
}
Ref<Comment> Document::createComment(const String& data)
{
return Comment::create(*this, data);
}
RefPtr<CDATASection> Document::createCDATASection(const String& data, ExceptionCode& ec)
{
if (isHTMLDocument()) {
ec = NOT_SUPPORTED_ERR;
return nullptr;
}
return CDATASection::create(*this, data);
}
RefPtr<ProcessingInstruction> Document::createProcessingInstruction(const String& target, const String& data, ExceptionCode& ec)
{
if (!isValidName(target)) {
ec = INVALID_CHARACTER_ERR;
return nullptr;
}
if (isHTMLDocument()) {
ec = NOT_SUPPORTED_ERR;
return nullptr;
}
return ProcessingInstruction::create(*this, target, data);
}
RefPtr<EntityReference> Document::createEntityReference(const String& name, ExceptionCode& ec)
{
if (!isValidName(name)) {
ec = INVALID_CHARACTER_ERR;
return nullptr;
}
if (isHTMLDocument()) {
ec = NOT_SUPPORTED_ERR;
return nullptr;
}
return EntityReference::create(*this, name);
}
Ref<Text> Document::createEditingTextNode(const String& text)
{
return Text::createEditingText(*this, text);
}
Ref<CSSStyleDeclaration> Document::createCSSStyleDeclaration()
{
Ref<MutableStyleProperties> propertySet(MutableStyleProperties::create());
return *propertySet->ensureCSSStyleDeclaration();
}
RefPtr<Node> Document::importNode(Node* importedNode, bool deep, ExceptionCode& ec)
{
if (!importedNode) {
ec = NOT_SUPPORTED_ERR;
return nullptr;
}
switch (importedNode->nodeType()) {
case ELEMENT_NODE:
case TEXT_NODE:
case CDATA_SECTION_NODE:
case ENTITY_REFERENCE_NODE:
case PROCESSING_INSTRUCTION_NODE:
case COMMENT_NODE:
case DOCUMENT_FRAGMENT_NODE:
return importedNode->cloneNodeInternal(document(), deep ? CloningOperation::Everything : CloningOperation::OnlySelf);
case ATTRIBUTE_NODE:
// FIXME: This will "Attr::normalize" child nodes of Attr.
return Attr::create(*this, QualifiedName(nullAtom, downcast<Attr>(*importedNode).name(), nullAtom), downcast<Attr>(*importedNode).value());
case DOCUMENT_NODE: // Can't import a document into another document.
case DOCUMENT_TYPE_NODE: // FIXME: Support cloning a DocumentType node per DOM4.
break;
case ENTITY_NODE:
case XPATH_NAMESPACE_NODE:
ASSERT_NOT_REACHED(); // These two types of DOM nodes are not implemented.
break;
}
ec = NOT_SUPPORTED_ERR;
return nullptr;
}
RefPtr<Node> Document::adoptNode(PassRefPtr<Node> source, ExceptionCode& ec)
{
if (!source) {
ec = NOT_SUPPORTED_ERR;
return nullptr;
}
if (source->isReadOnlyNode()) {
ec = NO_MODIFICATION_ALLOWED_ERR;
return nullptr;
}
EventQueueScope scope;
switch (source->nodeType()) {
case ENTITY_NODE:
case DOCUMENT_NODE:
case DOCUMENT_TYPE_NODE:
case XPATH_NAMESPACE_NODE:
ec = NOT_SUPPORTED_ERR;
return nullptr;
case ATTRIBUTE_NODE: {
Attr& attr = downcast<Attr>(*source);
if (attr.ownerElement())
attr.ownerElement()->removeAttributeNode(&attr, ec);
break;
}
default:
if (source->isShadowRoot()) {
// ShadowRoot cannot disconnect itself from the host node.
ec = HIERARCHY_REQUEST_ERR;
return nullptr;
}
if (is<HTMLFrameOwnerElement>(*source)) {
HTMLFrameOwnerElement& frameOwnerElement = downcast<HTMLFrameOwnerElement>(*source);
if (frame() && frame()->tree().isDescendantOf(frameOwnerElement.contentFrame())) {
ec = HIERARCHY_REQUEST_ERR;
return nullptr;
}
}