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Document.cpp
9351 lines (7729 loc) · 319 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) 2004-2022 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 "ApplicationManifest.h"
#include "Attr.h"
#include "BeforeUnloadEvent.h"
#include "CDATASection.h"
#include "CSSAnimation.h"
#include "CSSFontSelector.h"
#include "CSSParser.h"
#include "CSSStyleDeclaration.h"
#include "CSSStyleSheet.h"
#include "CachedCSSStyleSheet.h"
#include "CachedFontLoadRequest.h"
#include "CachedFrame.h"
#include "CachedResourceLoader.h"
#include "CanvasRenderingContext2D.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "Comment.h"
#include "CommonAtomStrings.h"
#include "CommonVM.h"
#include "ComposedTreeIterator.h"
#include "CompositionEvent.h"
#include "ConstantPropertyMap.h"
#include "ContentSecurityPolicy.h"
#include "ContentfulPaintChecker.h"
#include "CookieJar.h"
#include "CustomEffect.h"
#include "CustomElementReactionQueue.h"
#include "CustomElementRegistry.h"
#include "CustomEvent.h"
#include "DOMCSSPaintWorklet.h"
#include "DOMImplementation.h"
#include "DOMWindow.h"
#include "DateComponents.h"
#include "DebugPageOverlays.h"
#include "DeprecatedGlobalSettings.h"
#include "DocumentFontLoader.h"
#include "DocumentInlines.h"
#include "DocumentLoader.h"
#include "DocumentMarkerController.h"
#include "DocumentSharedObjectPool.h"
#include "DocumentTimeline.h"
#include "DocumentTimelinesController.h"
#include "DocumentType.h"
#include "DragEvent.h"
#include "Editing.h"
#include "Editor.h"
#include "ElementIterator.h"
#include "ElementRareData.h"
#include "EventHandler.h"
#include "ExtensionStyleSheets.h"
#include "FocusController.h"
#include "FocusEvent.h"
#include "FocusOptions.h"
#include "FontFaceSet.h"
#include "FormController.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameView.h"
#include "FullscreenManager.h"
#include "GCReachableRef.h"
#include "GPUCanvasContext.h"
#include "GenericCachedHTMLCollection.h"
#include "HTMLAllCollection.h"
#include "HTMLAnchorElement.h"
#include "HTMLAttachmentElement.h"
#include "HTMLBaseElement.h"
#include "HTMLBodyElement.h"
#include "HTMLCanvasElement.h"
#include "HTMLConstructionSite.h"
#include "HTMLDialogElement.h"
#include "HTMLDocument.h"
#include "HTMLElementFactory.h"
#include "HTMLFormControlElement.h"
#include "HTMLFrameElement.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLFrameSetElement.h"
#include "HTMLHeadElement.h"
#include "HTMLHtmlElement.h"
#include "HTMLIFrameElement.h"
#include "HTMLImageElement.h"
#include "HTMLInputElement.h"
#include "HTMLLinkElement.h"
#include "HTMLMediaElement.h"
#include "HTMLMetaElement.h"
#include "HTMLNameCollection.h"
#include "HTMLParserIdioms.h"
#include "HTMLPictureElement.h"
#include "HTMLPlugInElement.h"
#include "HTMLScriptElement.h"
#include "HTMLStyleElement.h"
#include "HTMLTitleElement.h"
#include "HTMLUnknownElement.h"
#include "HTMLVideoElement.h"
#include "HTTPHeaderNames.h"
#include "HTTPParsers.h"
#include "HashChangeEvent.h"
#include "HighlightRegister.h"
#include "History.h"
#include "HitTestResult.h"
#include "IDBConnectionProxy.h"
#include "IDBOpenDBRequest.h"
#include "IdleCallbackController.h"
#include "ImageBitmapRenderingContext.h"
#include "ImageLoader.h"
#include "ImageOverlayController.h"
#include "InspectorInstrumentation.h"
#include "IntersectionObserver.h"
#include "JSCustomElementInterface.h"
#include "JSDOMWindowCustom.h"
#include "JSLazyEventListener.h"
#include "KeyboardEvent.h"
#include "KeyframeEffect.h"
#include "LayoutDisallowedScope.h"
#include "LazyLoadImageObserver.h"
#include "LegacySchemeRegistry.h"
#include "LoaderStrategy.h"
#include "Logging.h"
#include "MediaCanStartListener.h"
#include "MediaProducer.h"
#include "MediaQueryList.h"
#include "MediaQueryMatcher.h"
#include "MediaStream.h"
#include "MessageEvent.h"
#include "ModalContainerObserver.h"
#include "MouseEventWithHitTestResults.h"
#include "MutationEvent.h"
#include "NameNodeList.h"
#include "NavigationDisabler.h"
#include "NavigationScheduler.h"
#include "NestingLevelIncrementer.h"
#include "NodeIterator.h"
#include "NodeRareData.h"
#include "NodeWithIndex.h"
#include "NotificationController.h"
#include "OverflowEvent.h"
#include "PageConsoleClient.h"
#include "PageGroup.h"
#include "PageTransitionEvent.h"
#include "PaintWorkletGlobalScope.h"
#include "Performance.h"
#include "PerformanceNavigationTiming.h"
#include "PingLoader.h"
#include "PlatformLocale.h"
#include "PlatformMediaSessionManager.h"
#include "PlatformScreen.h"
#include "PlatformStrategies.h"
#include "PlugInsResources.h"
#include "PluginDocument.h"
#include "PointerCaptureController.h"
#include "PointerLockController.h"
#include "PolicyChecker.h"
#include "PopStateEvent.h"
#include "ProcessingInstruction.h"
#include "PseudoClassChangeInvalidation.h"
#include "PublicSuffix.h"
#include "Quirks.h"
#include "RTCNetworkManager.h"
#include "Range.h"
#include "RealtimeMediaSourceCenter.h"
#include "RenderChildIterator.h"
#include "RenderInline.h"
#include "RenderLayerCompositor.h"
#include "RenderLineBreak.h"
#include "RenderTreeUpdater.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "ReportingScope.h"
#include "RequestAnimationFrameCallback.h"
#include "ResizeObserver.h"
#include "ResourceLoadObserver.h"
#include "RuntimeApplicationChecks.h"
#include "SVGDocumentExtensions.h"
#include "SVGElementFactory.h"
#include "SVGElementTypeHelpers.h"
#include "SVGNames.h"
#include "SVGSVGElement.h"
#include "SVGTitleElement.h"
#include "SVGUseElement.h"
#include "SWClientConnection.h"
#include "ScopedEventQueue.h"
#include "ScriptController.h"
#include "ScriptDisallowedScope.h"
#include "ScriptModuleLoader.h"
#include "ScriptRunner.h"
#include "ScriptSourceCode.h"
#include "ScriptedAnimationController.h"
#include "ScrollAnimator.h"
#include "ScrollbarTheme.h"
#include "ScrollingCoordinator.h"
#include "SecurityOrigin.h"
#include "SecurityOriginData.h"
#include "SecurityOriginPolicy.h"
#include "SecurityPolicy.h"
#include "SegmentedString.h"
#include "SelectorQuery.h"
#include "ServiceWorkerClientData.h"
#include "ServiceWorkerContainer.h"
#include "ServiceWorkerProvider.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "SleepDisabler.h"
#include "SocketProvider.h"
#include "SpeechRecognition.h"
#include "StorageEvent.h"
#include "StringCallback.h"
#include "StyleAdjuster.h"
#include "StyleColor.h"
#include "StyleProperties.h"
#include "StyleResolveForDocument.h"
#include "StyleResolver.h"
#include "StyleScope.h"
#include "StyleSheetContents.h"
#include "StyleSheetList.h"
#include "StyleTreeResolver.h"
#include "SubresourceLoader.h"
#include "TemplateContentDocumentFragment.h"
#include "TextAutoSizing.h"
#include "TextEvent.h"
#include "TextManipulationController.h"
#include "TextNodeTraversal.h"
#include "TextResourceDecoder.h"
#include "TouchAction.h"
#include "TransformSource.h"
#include "TreeWalker.h"
#include "UndoManager.h"
#include "UserGestureIndicator.h"
#include "ValidationMessageClient.h"
#include "ViolationReportType.h"
#include "VisibilityChangeClient.h"
#include "VisitedLinkState.h"
#include "VisualViewport.h"
#include "WakeLockManager.h"
#include "WebAnimation.h"
#include "WebAnimationUtilities.h"
#include "WebRTCProvider.h"
#include "WheelEvent.h"
#include "WindowEventLoop.h"
#include "WindowFeatures.h"
#include "XMLDocument.h"
#include "XMLDocumentParser.h"
#include "XMLNSNames.h"
#include "XMLNames.h"
#include "XPathEvaluator.h"
#include "XPathExpression.h"
#include "XPathNSResolver.h"
#include "XPathResult.h"
#include <JavaScriptCore/ConsoleMessage.h>
#include <JavaScriptCore/RegularExpression.h>
#include <JavaScriptCore/ScriptCallStack.h>
#include <JavaScriptCore/VM.h>
#include <ctime>
#include <wtf/CryptographicallyRandomNumber.h>
#include <wtf/HexNumber.h>
#include <wtf/IsoMallocInlines.h>
#include <wtf/Language.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/SetForScope.h>
#include <wtf/SystemTracing.h>
#include <wtf/UUID.h>
#include <wtf/text/StringBuffer.h>
#include <wtf/text/TextStream.h>
#if ENABLE(APP_HIGHLIGHTS)
#include "AppHighlightStorage.h"
#endif
#if ENABLE(DEVICE_ORIENTATION)
#include "DeviceMotionEvent.h"
#include "DeviceOrientationAndMotionAccessController.h"
#include "DeviceOrientationEvent.h"
#endif
#if ENABLE(CONTENT_CHANGE_OBSERVER)
#include "ContentChangeObserver.h"
#include "DOMTimerHoldingTank.h"
#endif
#if PLATFORM(IOS_FAMILY)
#include "DeviceMotionClientIOS.h"
#include "DeviceMotionController.h"
#include "DeviceOrientationClientIOS.h"
#include "DeviceOrientationController.h"
#include "Geolocation.h"
#include "Navigator.h"
#include "NavigatorGeolocation.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 USE(QUICK_LOOK)
#include "QuickLook.h"
#endif
#if ENABLE(TOUCH_EVENTS)
#include "TouchEvent.h"
#endif
#if ENABLE(VIDEO)
#include "CaptionUserPreferences.h"
#endif
#if ENABLE(WIRELESS_PLAYBACK_TARGET)
#include "MediaPlaybackTargetClient.h"
#endif
#if ENABLE(XSLT)
#include "XSLTProcessor.h"
#endif
#if ENABLE(WEBGL)
#include "WebGLRenderingContext.h"
#endif
#if ENABLE(WEBGL2)
#include "WebGL2RenderingContext.h"
#endif
#if ENABLE(PICTURE_IN_PICTURE_API)
#include "HTMLVideoElement.h"
#endif
#define DOCUMENT_RELEASE_LOG(channel, fmt, ...) RELEASE_LOG(channel, "%p - [pageID=%" PRIu64 ", frameID=%" PRIu64 ", isMainFrame=%d] Document::" fmt, this, valueOrDefault(pageID()).toUInt64(), valueOrDefault(frameID()).object().toUInt64(), this == &topDocument(), ##__VA_ARGS__)
#define DOCUMENT_RELEASE_LOG_ERROR(channel, fmt, ...) RELEASE_LOG_ERROR(channel, "%p - [pageID=%" PRIu64 ", frameID=%" PRIu64 ", isMainFrame=%d] Document::" fmt, this, valueOrDefault(pageID()).toUInt64(), valueOrDefault(frameID()).object().toUInt64(), this == &topDocument(), ##__VA_ARGS__)
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(Document);
using namespace HTMLNames;
using namespace WTF::Unicode;
static const unsigned cMaxWriteRecursionDepth = 21;
bool Document::hasEverCreatedAnAXObjectCache = false;
static const Seconds maxIntervalForUserGestureForwardingAfterMediaFinishesPlaying { 1_s };
// Defined here to avoid including GCReachableRef.h in Document.h
struct Document::PendingScrollEventTargetList {
WTF_MAKE_FAST_ALLOCATED;
public:
Vector<GCReachableRef<ContainerNode>> targets;
};
static const Seconds intersectionObserversInitialUpdateDelay { 2000_ms };
// https://www.w3.org/TR/xml/#NT-NameStartChar
// NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
static inline bool isValidNameStart(UChar32 c)
{
return c == ':' || (c >= 'A' && c <= 'Z') || c == '_' || (c >= 'a' && c <= 'z') || (c >= 0x00C0 && c <= 0x00D6)
|| (c >= 0x00D8 && c <= 0x00F6) || (c >= 0x00F8 && c <= 0x02FF) || (c >= 0x0370 && c <= 0x037D) || (c >= 0x037F && c <= 0x1FFF)
|| (c >= 0x200C && c <= 0x200D) || (c >= 0x2070 && c <= 0x218F) || (c >= 0x2C00 && c <= 0x2FeF) || (c >= 0x3001 && c <= 0xD7FF)
|| (c >= 0xF900 && c <= 0xFDCF) || (c >= 0xFDF0 && c <= 0xFFFD) || (c >= 0x10000 && c <= 0xEFFFF);
}
// https://www.w3.org/TR/xml/#NT-NameChar
// NameChar ::= NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
static inline bool isValidNamePart(UChar32 c)
{
return isValidNameStart(c) || c == '-' || c == '.' || (c >= '0' && c <= '9') || c == 0x00B7
|| (c >= 0x0300 && c <= 0x036F) || (c >= 0x203F && c <= 0x2040);
}
static Widget* widgetForElement(Element* focusedElement)
{
auto* renderer = focusedElement ? dynamicDowncast<RenderWidget>(focusedElement->renderer()) : nullptr;
return renderer ? renderer->widget() : nullptr;
}
static bool acceptsEditingFocus(const Element& element)
{
ASSERT(element.hasEditableStyle());
RefPtr root = element.rootEditableElement();
RefPtr frame = element.document().frame();
if (!frame || !root)
return false;
return frame->editor().shouldBeginEditing(makeRangeSelectingNodeContents(*root));
}
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 (RefPtr<AbstractFrame> ancestorFrame = targetFrame; ancestorFrame; ancestorFrame = ancestorFrame->tree().parent()) {
RefPtr localAncestor = dynamicDowncast<LocalFrame>(ancestorFrame.get());
if (!localAncestor)
continue;
RefPtr ancestorDocument = localAncestor->document();
// FIXME: Should be an ASSERT? Frames should alway have documents.
if (!ancestorDocument)
return true;
const SecurityOrigin& ancestorSecurityOrigin = ancestorDocument->securityOrigin();
if (activeSecurityOrigin.isSameOriginDomain(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;
static const void* sharedLoggerOwner()
{
static uint64_t owner = cryptographicallyRandomNumber<uint32_t>();
return reinterpret_cast<const void*>(owner);
}
static Logger*& staticSharedLogger()
{
static Logger* logger;
return logger;
}
const Logger& Document::sharedLogger()
{
if (!staticSharedLogger()) {
staticSharedLogger() = &Logger::create(sharedLoggerOwner()).leakRef();
configureSharedLogger();
}
return *staticSharedLogger();
}
void Document::configureSharedLogger()
{
auto logger = staticSharedLogger();
if (!logger)
return;
bool alwaysOnLoggingAllowed = !allDocumentsMap().isEmpty() && WTF::allOf(allDocumentsMap().values(), [](auto* document) {
auto* page = document->page();
return !page || page->sessionID().isAlwaysOnLoggingAllowed();
});
logger->setEnabled(sharedLoggerOwner(), alwaysOnLoggingAllowed);
}
void Document::addToDocumentsMap()
{
auto addResult = allDocumentsMap().add(identifier(), this);
ASSERT_UNUSED(addResult, addResult.isNewEntry);
configureSharedLogger();
}
void Document::removeFromDocumentsMap()
{
ASSERT(allDocumentsMap().contains(identifier()));
allDocumentsMap().remove(identifier());
configureSharedLogger();
}
auto Document::allDocumentsMap() -> DocumentsMap&
{
static NeverDestroyed<DocumentsMap> documents;
return documents;
}
auto Document::allDocuments() -> DocumentsMap::ValuesIteratorRange
{
return allDocumentsMap().values();
}
static inline int currentOrientation(Frame* frame)
{
#if ENABLE(ORIENTATION_EVENTS)
if (frame)
return frame->orientation();
#else
UNUSED_PARAM(frame);
#endif
return 0;
}
static Ref<CachedResourceLoader> createCachedResourceLoader(Frame* frame)
{
if (frame) {
if (auto loader = frame->loader().activeDocumentLoader())
return loader->cachedResourceLoader();
}
return CachedResourceLoader::create(nullptr);
}
Document::Document(Frame* frame, const Settings& settings, const URL& url, DocumentClasses documentClasses, unsigned constructionFlags, ScriptExecutionContextIdentifier identifier)
: ContainerNode(*this, CreateDocument)
, TreeScope(*this)
, ScriptExecutionContext(identifier)
, FrameDestructionObserver(frame)
, m_settings(settings)
, m_quirks(makeUniqueRef<Quirks>(*this))
, m_parserContentPolicy(DefaultParserContentPolicy)
, m_cachedResourceLoader(createCachedResourceLoader(frame))
, m_creationURL(url)
, m_domTreeVersion(++s_globalTreeVersion)
, m_styleScope(makeUnique<Style::Scope>(*this))
, m_extensionStyleSheets(makeUnique<ExtensionStyleSheets>(*this))
, m_visitedLinkState(makeUnique<VisitedLinkState>(*this))
, m_markers(makeUnique<DocumentMarkerController>(*this))
, m_styleRecalcTimer([this] { updateStyleIfNeeded(); })
#if !LOG_DISABLED
, m_documentCreationTime(MonotonicTime::now())
#endif
, m_scriptRunner(makeUnique<ScriptRunner>(*this))
, m_moduleLoader(makeUnique<ScriptModuleLoader>(*this, ScriptModuleLoader::OwnerType::Document))
#if ENABLE(XSLT)
, m_applyPendingXSLTransformsTimer(*this, &Document::applyPendingXSLTransformsTimerFired)
#endif
, m_xmlVersion("1.0"_s)
, m_constantPropertyMap(makeUnique<ConstantPropertyMap>(*this))
, m_documentClasses(documentClasses)
#if ENABLE(FULLSCREEN_API)
, m_fullscreenManager { makeUniqueRef<FullscreenManager>(*this) }
#endif
, m_intersectionObserversInitialUpdateTimer(*this, &Document::intersectionObserversInitialUpdateTimerFired)
, m_loadEventDelayTimer(*this, &Document::loadEventDelayTimerFired)
#if PLATFORM(IOS_FAMILY) && ENABLE(DEVICE_ORIENTATION)
, m_deviceMotionClient(makeUnique<DeviceMotionClientIOS>(page() ? page()->deviceOrientationUpdateProvider() : nullptr))
, m_deviceMotionController(makeUnique<DeviceMotionController>(*m_deviceMotionClient))
, m_deviceOrientationClient(makeUnique<DeviceOrientationClientIOS>(page() ? page()->deviceOrientationUpdateProvider() : nullptr))
, m_deviceOrientationController(makeUnique<DeviceOrientationController>(*m_deviceOrientationClient))
#endif
, m_pendingTasksTimer(*this, &Document::pendingTasksTimerFired)
, m_visualUpdatesSuppressionTimer(*this, &Document::visualUpdatesSuppressionTimerFired)
, m_sharedObjectPoolClearTimer(*this, &Document::clearSharedObjectPool)
, m_fontSelector(CSSFontSelector::create(*this))
, m_fontLoader(makeUniqueRef<DocumentFontLoader>(*this))
, m_didAssociateFormControlsTimer(*this, &Document::didAssociateFormControlsTimerFired)
, m_cookieCacheExpiryTimer(*this, &Document::invalidateDOMCookieCache)
, m_socketProvider(page() ? &page()->socketProvider() : nullptr)
, m_isSynthesized(constructionFlags & Synthesized)
, m_isNonRenderedPlaceholder(constructionFlags & NonRenderedPlaceholder)
, m_orientationNotifier(currentOrientation(frame))
, m_undoManager(UndoManager::create(*this))
, m_editor(makeUniqueRef<Editor>(*this))
, m_selection(makeUniqueRef<FrameSelection>(this))
, m_whitespaceCache(makeUniqueRef<WhitespaceCache>())
, m_reportingScope(ReportingScope::create(*this))
{
addToDocumentsMap();
// 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);
m_cachedResourceLoader->setDocument(this);
resetLinkColor();
resetVisitedLinkColor();
resetActiveLinkColor();
initSecurityContext();
initDNSPrefetch();
m_fontSelector->registerForInvalidationCallbacks(*this);
for (auto& nodeListAndCollectionCount : m_nodeListAndCollectionCounts)
nodeListAndCollectionCount = 0;
InspectorInstrumentation::addEventListenersToNode(*this);
setStorageBlockingPolicy(m_settings->storageBlockingPolicy());
}
void Document::createNewIdentifier()
{
removeFromDocumentsMap();
regenerateIdentifier();
addToDocumentsMap();
}
Ref<Document> Document::create(Document& contextDocument)
{
auto document = adoptRef(*new Document(nullptr, contextDocument.m_settings, URL(), { }));
document->addToContextsMap();
document->setContextDocument(contextDocument);
document->setSecurityOriginPolicy(contextDocument.securityOriginPolicy());
return document;
}
Ref<Document> Document::createNonRenderedPlaceholder(Frame& frame, const URL& url)
{
auto document = adoptRef(*new Document(&frame, frame.settings(), url, { }, NonRenderedPlaceholder));
document->addToContextsMap();
return document;
}
Document::~Document()
{
ASSERT(activeDOMObjectsAreStopped());
if (m_logger)
m_logger->removeObserver(*this);
if (m_intersectionObserverData) {
for (const auto& observer : m_intersectionObserverData->observers) {
if (observer)
observer->rootDestroyed();
}
m_intersectionObserverData->observers.clear();
// Document cannot be a target.
ASSERT(m_intersectionObserverData->registrations.isEmpty());
}
removeFromDocumentsMap();
// We need to remove from the contexts map very early in the destructor so that calling postTask() on this Document from another thread is safe.
removeFromContextsMap();
ASSERT(!renderView());
ASSERT(m_backForwardCacheState != InBackForwardCache);
ASSERT(m_ranges.isEmpty());
ASSERT(!m_parentTreeScope);
ASSERT(!m_disabledFieldsetElementsCount);
ASSERT(m_inDocumentShadowRoots.isEmpty());
#if ENABLE(DEVICE_ORIENTATION) && PLATFORM(IOS_FAMILY)
m_deviceMotionClient->deviceMotionControllerDestroyed();
m_deviceOrientationClient->deviceOrientationControllerDestroyed();
#endif
if (m_templateDocument)
m_templateDocument->setTemplateDocumentHost(nullptr); // balanced in templateDocument().
// FIXME: Should we reset m_domWindow when we detach from the Frame?
if (m_domWindow)
m_domWindow->resetUnlessSuspendedForDocumentSuspension();
m_scriptRunner = nullptr;
m_moduleLoader = nullptr;
removeAllEventListeners();
if (m_eventLoop)
m_eventLoop->removeAssociatedContext(*this);
// 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->detach();
extensionStyleSheets().detachFromDocument();
styleScope().clearResolver(); // We need to destroy CSSFontSelector before destroying m_cachedResourceLoader.
m_fontLoader->stopLoadingAndClearFonts();
// 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);
// 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();
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(m_listsInvalidatedAtDocument.isEmpty());
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(m_collectionsInvalidatedAtDocument.isEmpty());
for (unsigned count : m_nodeListAndCollectionCounts)
ASSERT_UNUSED(count, !count);
}
void Document::removedLastRef()
{
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
ASSERT(!m_deletionHasBegun);
if (m_referencingNodeCount) {
// Node::removedLastRef doesn't set refCount() to zero because it's not observable.
// But we need to remember that our refCount reached zero in subsequent calls to decrementReferencingNodeCount().
m_refCountAndParentBit = 0;
// 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();
RELEASE_ASSERT(!hasLivingRenderTree());
// 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_focusNavigationStartingNode = nullptr;
m_userActionElements.clear();
#if ENABLE(FULLSCREEN_API)
m_fullscreenManager->clear();
#endif
m_associatedFormControls.clear();
m_pendingRenderTreeUpdate = { };
m_fontLoader->stopLoadingAndClearFonts();
detachParser();
RELEASE_ASSERT(m_selection->isNone());
// removeDetachedChildren() doesn't always unregister IDs,
// so tear down scope information up front to avoid having
// stale references in the map.
destroyTreeScopeData();
removeDetachedChildren();
RELEASE_ASSERT(m_topLayerElements.isEmpty());
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 {
commonTeardown();
#ifndef NDEBUG
m_inRemovedLastRefFunction = false;
m_deletionHasBegun = true;
#endif
delete this;
}
}
void Document::commonTeardown()
{
stopActiveDOMObjects();
#if ENABLE(FULLSCREEN_API)
m_fullscreenManager->emptyEventQueue();
#endif
if (svgExtensions())
accessSVGExtensions().pauseAnimations();
clearScriptedAnimationController();
m_documentFragmentForInnerOuterHTML = nullptr;
auto intersectionObservers = m_intersectionObservers;
for (auto& intersectionObserver : intersectionObservers) {
if (intersectionObserver)
intersectionObserver->disconnect();
}
auto resizeObservers = m_resizeObservers;
for (auto& resizeObserver : resizeObservers) {
if (resizeObserver)
resizeObserver->disconnect();
}
scriptRunner().clearPendingScripts();
if (m_highlightRegister)
m_highlightRegister->clear();
if (m_fragmentHighlightRegister)
m_fragmentHighlightRegister->clear();
#if ENABLE(APP_HIGHLIGHTS)
if (m_appHighlightRegister)
m_appHighlightRegister->clear();
#endif
m_pendingScrollEventTargetList = nullptr;
if (m_timelinesController)
m_timelinesController->detachFromDocument();
m_timeline = nullptr;
m_associatedFormControls.clear();
m_didAssociateFormControlsTimer.stop();
#if ENABLE(WEB_RTC)
if (m_rtcNetworkManager) {
m_rtcNetworkManager->close();
m_rtcNetworkManager = nullptr;
}
#endif
}
Element* Document::elementForAccessKey(const String& key)
{
if (key.isEmpty())
return nullptr;
if (!m_accessKeyCache)
buildAccessKeyCache();
return m_accessKeyCache->get(key).get();
}
void Document::buildAccessKeyCache()
{
m_accessKeyCache = makeUnique<HashMap<String, WeakPtr<Element, WeakPtrImplWithEventTargetData>, ASCIICaseInsensitiveHash>>([this] {
HashMap<String, WeakPtr<Element, WeakPtrImplWithEventTargetData>, ASCIICaseInsensitiveHash> map;
for (auto& node : composedTreeDescendants(*this)) {
auto element = dynamicDowncast<Element>(node);
if (!element)
continue;
auto& key = element->attributeWithoutSynchronization(accesskeyAttr);
if (key.isEmpty())
continue;
map.add(key, *element);
}
return map;
}());
}
void Document::invalidateAccessKeyCacheSlowCase()
{
m_accessKeyCache = nullptr;
}
ExceptionOr<SelectorQuery&> Document::selectorQueryForString(const String& selectorString)
{
if (selectorString.isEmpty())
return Exception { SyntaxError };
if (!m_selectorQueryCache)
m_selectorQueryCache = makeUnique<SelectorQueryCache>();
return m_selectorQueryCache->add(selectorString, *this);
}
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.
extensionStyleSheets().clearPageUserSheet();
extensionStyleSheets().invalidateInjectedStyleSheetCache();
}
if (renderView())
renderView()->updateQuirksMode();
}
String Document::compatMode() const
{
return inQuirksMode() ? "BackCompat"_s : "CSS1Compat"_s;
}
const Color& Document::themeColor()
{
if (!m_cachedThemeColor.isValid()) {
if (!m_activeThemeColorMetaElement)
m_activeThemeColorMetaElement = determineActiveThemeColorMetaElement();
if (m_activeThemeColorMetaElement)
m_cachedThemeColor = m_activeThemeColorMetaElement->contentColor();
if (!m_cachedThemeColor.isValid())
m_cachedThemeColor = m_applicationManifestThemeColor;
}
return m_cachedThemeColor;
}
void Document::resetLinkColor()
{
m_linkColor = StyleColor::colorFromKeyword(CSSValueWebkitLink, styleColorOptions(nullptr));
}
void Document::resetVisitedLinkColor()
{
m_visitedLinkColor = StyleColor::colorFromKeyword(CSSValueWebkitLink, styleColorOptions(nullptr) | StyleColorOptions::ForVisitedLink);
}
void Document::resetActiveLinkColor()
{
m_activeLinkColor = StyleColor::colorFromKeyword(CSSValueWebkitActivelink, styleColorOptions(nullptr));
}
DOMImplementation& Document::implementation()
{
if (!m_implementation)
m_implementation = makeUnique<DOMImplementation>(*this);
return *m_implementation;
}
bool Document::hasManifest() const
{
return documentElement() && documentElement()->hasTagName(htmlTag) && documentElement()->hasAttributeWithoutSynchronization(manifestAttr);
}
DocumentType* Document::doctype() const
{
for (Node* node = firstChild(); node; node = node->nextSibling()) {
if (is<DocumentType>(node))
return downcast<DocumentType>(node);
}
return nullptr;
}
void Document::childrenChanged(const ChildChange& change)
{
ContainerNode::childrenChanged(change);
// 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());
Element* newDocumentElement = childrenOfType<Element>(*this).first();
if (newDocumentElement == m_documentElement)
return;
m_documentElement = newDocumentElement;
setDocumentElementLanguage(m_documentElement ? m_documentElement->langFromAttribute() : nullAtom());
setDocumentElementTextDirection(m_documentElement && is<HTMLElement>(m_documentElement) && m_documentElement->usesEffectiveTextDirection()
? downcast<HTMLElement>(*m_documentElement).effectiveTextDirection() : TextDirection::LTR);
// The root style used for media query matching depends on the document element.
styleScope().clearResolver();