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chromium / chromium / src.git / 37b65afaf587c59143a6dca1ea75a505d6c696c6 / . / third_party / WebKit / Source / core / dom / Document.cpp
blob: 53800840da18868108784a81b1d4ec79cd4c6686 [file] [log] [blame]
/*
* 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 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 "core/dom/Document.h"
#include "bindings/core/v8/DOMDataStore.h"
#include "bindings/core/v8/ExceptionMessages.h"
#include "bindings/core/v8/ExceptionState.h"
#include "bindings/core/v8/HTMLScriptElementOrSVGScriptElement.h"
#include "bindings/core/v8/Microtask.h"
#include "bindings/core/v8/ScriptController.h"
#include "bindings/core/v8/SourceLocation.h"
#include "bindings/core/v8/StringOrDictionary.h"
#include "bindings/core/v8/V0CustomElementConstructorBuilder.h"
#include "bindings/core/v8/V8DOMWrapper.h"
#include "bindings/core/v8/V8ElementCreationOptions.h"
#include "bindings/core/v8/V8PerIsolateData.h"
#include "bindings/core/v8/WindowProxy.h"
#include "core/HTMLElementFactory.h"
#include "core/HTMLElementTypeHelpers.h"
#include "core/HTMLNames.h"
#include "core/SVGElementFactory.h"
#include "core/SVGNames.h"
#include "core/XMLNSNames.h"
#include "core/XMLNames.h"
#include "core/animation/CompositorPendingAnimations.h"
#include "core/animation/DocumentAnimations.h"
#include "core/animation/DocumentTimeline.h"
#include "core/css/CSSFontSelector.h"
#include "core/css/CSSStyleDeclaration.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/CSSTiming.h"
#include "core/css/FontFaceSet.h"
#include "core/css/MediaQueryMatcher.h"
#include "core/css/PropertyRegistry.h"
#include "core/css/StylePropertySet.h"
#include "core/css/StyleSheetContents.h"
#include "core/css/StyleSheetList.h"
#include "core/css/invalidation/StyleInvalidator.h"
#include "core/css/parser/CSSParser.h"
#include "core/css/resolver/FontBuilder.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/css/resolver/StyleResolverStats.h"
#include "core/dom/AXObjectCache.h"
#include "core/dom/Attr.h"
#include "core/dom/CDATASection.h"
#include "core/dom/ClientRect.h"
#include "core/dom/Comment.h"
#include "core/dom/ContextFeatures.h"
#include "core/dom/DOMImplementation.h"
#include "core/dom/DocumentFragment.h"
#include "core/dom/DocumentParserTiming.h"
#include "core/dom/DocumentType.h"
#include "core/dom/Element.h"
#include "core/dom/ElementCreationOptions.h"
#include "core/dom/ElementDataCache.h"
#include "core/dom/ElementRegistrationOptions.h"
#include "core/dom/ElementTraversal.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/ExecutionContextTask.h"
#include "core/dom/FrameRequestCallback.h"
#include "core/dom/IntersectionObserverController.h"
#include "core/dom/LayoutTreeBuilderTraversal.h"
#include "core/dom/LiveNodeList.h"
#include "core/dom/MutationObserver.h"
#include "core/dom/NodeChildRemovalTracker.h"
#include "core/dom/NodeComputedStyle.h"
#include "core/dom/NodeFilter.h"
#include "core/dom/NodeIterator.h"
#include "core/dom/NodeRareData.h"
#include "core/dom/NodeTraversal.h"
#include "core/dom/NodeWithIndex.h"
#include "core/dom/NthIndexCache.h"
#include "core/dom/ProcessingInstruction.h"
#include "core/dom/ScriptRunner.h"
#include "core/dom/ScriptedAnimationController.h"
#include "core/dom/ScriptedIdleTaskController.h"
#include "core/dom/SelectorQuery.h"
#include "core/dom/StaticNodeList.h"
#include "core/dom/StyleChangeReason.h"
#include "core/dom/StyleEngine.h"
#include "core/dom/TaskRunnerHelper.h"
#include "core/dom/TouchList.h"
#include "core/dom/TransformSource.h"
#include "core/dom/TreeWalker.h"
#include "core/dom/VisitedLinkState.h"
#include "core/dom/XMLDocument.h"
#include "core/dom/custom/CustomElement.h"
#include "core/dom/custom/CustomElementDefinition.h"
#include "core/dom/custom/CustomElementDescriptor.h"
#include "core/dom/custom/CustomElementRegistry.h"
#include "core/dom/custom/V0CustomElementMicrotaskRunQueue.h"
#include "core/dom/custom/V0CustomElementRegistrationContext.h"
#include "core/dom/shadow/ElementShadow.h"
#include "core/dom/shadow/FlatTreeTraversal.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/editing/EditingUtilities.h"
#include "core/editing/FrameSelection.h"
#include "core/editing/markers/DocumentMarkerController.h"
#include "core/editing/serializers/Serialization.h"
#include "core/editing/spellcheck/SpellChecker.h"
#include "core/events/BeforeUnloadEvent.h"
#include "core/events/Event.h"
#include "core/events/EventFactory.h"
#include "core/events/EventListener.h"
#include "core/events/HashChangeEvent.h"
#include "core/events/PageTransitionEvent.h"
#include "core/events/ScopedEventQueue.h"
#include "core/events/VisualViewportResizeEvent.h"
#include "core/events/VisualViewportScrollEvent.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/frame/DOMTimer.h"
#include "core/frame/DOMVisualViewport.h"
#include "core/frame/EventHandlerRegistry.h"
#include "core/frame/FrameConsole.h"
#include "core/frame/FrameHost.h"
#include "core/frame/FrameView.h"
#include "core/frame/History.h"
#include "core/frame/HostsUsingFeatures.h"
#include "core/frame/LocalDOMWindow.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/PerformanceMonitor.h"
#include "core/frame/Settings.h"
#include "core/frame/csp/ContentSecurityPolicy.h"
#include "core/html/DocumentNameCollection.h"
#include "core/html/HTMLAllCollection.h"
#include "core/html/HTMLAnchorElement.h"
#include "core/html/HTMLBaseElement.h"
#include "core/html/HTMLBodyElement.h"
#include "core/html/HTMLCanvasElement.h"
#include "core/html/HTMLCollection.h"
#include "core/html/HTMLDialogElement.h"
#include "core/html/HTMLDocument.h"
#include "core/html/HTMLFrameOwnerElement.h"
#include "core/html/HTMLHeadElement.h"
#include "core/html/HTMLHtmlElement.h"
#include "core/html/HTMLIFrameElement.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/HTMLLinkElement.h"
#include "core/html/HTMLMetaElement.h"
#include "core/html/HTMLScriptElement.h"
#include "core/html/HTMLTemplateElement.h"
#include "core/html/HTMLTitleElement.h"
#include "core/html/PluginDocument.h"
#include "core/html/WindowNameCollection.h"
#include "core/html/canvas/CanvasContextCreationAttributes.h"
#include "core/html/canvas/CanvasFontCache.h"
#include "core/html/canvas/CanvasRenderingContext.h"
#include "core/html/forms/FormController.h"
#include "core/html/imports/HTMLImportLoader.h"
#include "core/html/imports/HTMLImportsController.h"
#include "core/html/parser/HTMLDocumentParser.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "core/html/parser/NestingLevelIncrementer.h"
#include "core/html/parser/TextResourceDecoder.h"
#include "core/input/EventHandler.h"
#include "core/inspector/ConsoleMessage.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/inspector/InspectorTraceEvents.h"
#include "core/inspector/MainThreadDebugger.h"
#include "core/layout/HitTestCanvasResult.h"
#include "core/layout/HitTestResult.h"
#include "core/layout/LayoutPart.h"
#include "core/layout/LayoutView.h"
#include "core/layout/TextAutosizer.h"
#include "core/layout/api/LayoutPartItem.h"
#include "core/layout/api/LayoutViewItem.h"
#include "core/layout/compositing/PaintLayerCompositor.h"
#include "core/loader/CookieJar.h"
#include "core/loader/DocumentLoader.h"
#include "core/loader/FrameFetchContext.h"
#include "core/loader/FrameLoader.h"
#include "core/loader/FrameLoaderClient.h"
#include "core/loader/ImageLoader.h"
#include "core/loader/NavigationScheduler.h"
#include "core/loader/PrerendererClient.h"
#include "core/loader/appcache/ApplicationCacheHost.h"
#include "core/observer/ResizeObserverController.h"
#include "core/page/ChromeClient.h"
#include "core/page/EventWithHitTestResults.h"
#include "core/page/FocusController.h"
#include "core/page/FrameTree.h"
#include "core/page/Page.h"
#include "core/page/PointerLockController.h"
#include "core/page/scrolling/RootScrollerController.h"
#include "core/page/scrolling/ScrollStateCallback.h"
#include "core/page/scrolling/ScrollingCoordinator.h"
#include "core/page/scrolling/SnapCoordinator.h"
#include "core/page/scrolling/TopDocumentRootScrollerController.h"
#include "core/svg/SVGDocumentExtensions.h"
#include "core/svg/SVGScriptElement.h"
#include "core/svg/SVGTitleElement.h"
#include "core/svg/SVGUseElement.h"
#include "core/timing/DOMWindowPerformance.h"
#include "core/timing/Performance.h"
#include "core/workers/SharedWorkerRepositoryClient.h"
#include "core/xml/parser/XMLDocumentParser.h"
#include "platform/DateComponents.h"
#include "platform/EventDispatchForbiddenScope.h"
#include "platform/Histogram.h"
#include "platform/InstanceCounters.h"
#include "platform/Language.h"
#include "platform/LengthFunctions.h"
#include "platform/PluginScriptForbiddenScope.h"
#include "platform/RuntimeEnabledFeatures.h"
#include "platform/ScriptForbiddenScope.h"
#include "platform/WebFrameScheduler.h"
#include "platform/instrumentation/tracing/TraceEvent.h"
#include "platform/network/ContentSecurityPolicyParsers.h"
#include "platform/network/HTTPParsers.h"
#include "platform/scroll/Scrollbar.h"
#include "platform/scroll/ScrollbarTheme.h"
#include "platform/text/PlatformLocale.h"
#include "platform/text/SegmentedString.h"
#include "platform/weborigin/OriginAccessEntry.h"
#include "platform/weborigin/SchemeRegistry.h"
#include "platform/weborigin/SecurityOrigin.h"
#include "public/platform/InterfaceProvider.h"
#include "public/platform/Platform.h"
#include "public/platform/WebAddressSpace.h"
#include "public/platform/WebPrerenderingSupport.h"
#include "public/platform/WebScheduler.h"
#include "public/platform/modules/sensitive_input_visibility/sensitive_input_visibility_service.mojom-blink.h"
#include "wtf/AutoReset.h"
#include "wtf/CurrentTime.h"
#include "wtf/DateMath.h"
#include "wtf/Functional.h"
#include "wtf/HashFunctions.h"
#include "wtf/PtrUtil.h"
#include "wtf/StdLibExtras.h"
#include "wtf/text/CharacterNames.h"
#include "wtf/text/StringBuffer.h"
#include "wtf/text/TextEncodingRegistry.h"
#include <memory>
using namespace WTF;
using namespace Unicode;
#ifndef NDEBUG
using WeakDocumentSet =
blink::PersistentHeapHashSet<blink::WeakMember<blink::Document>>;
static WeakDocumentSet& liveDocumentSet();
#endif
namespace blink {
using namespace HTMLNames;
static const unsigned cMaxWriteRecursionDepth = 21;
// This amount of time must have elapsed before we will even consider scheduling
// a layout without a delay.
// FIXME: For faster machines this value can really be lowered to 200. 250 is
// adequate, but a little high for dual G5s. :)
static const int cLayoutScheduleThreshold = 250;
// 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
const uint32_t nameStartMask = Letter_Lowercase | Letter_Uppercase |
Letter_Other | Letter_Titlecase |
Number_Letter;
if (!(Unicode::category(c) & nameStartMask))
return false;
// rule (c) above
if (c >= 0xF900 && c < 0xFFFE)
return false;
// rule (d) above
CharDecompositionType decompType = decompositionType(c);
if (decompType == DecompositionFont || decompType == DecompositionCompat)
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
const uint32_t otherNamePartMask = Mark_NonSpacing | Mark_Enclosing |
Mark_SpacingCombining | Letter_Modifier |
Number_DecimalDigit;
if (!(Unicode::category(c) & otherNamePartMask))
return false;
// rule (c) above
if (c >= 0xF900 && c < 0xFFFE)
return false;
// rule (d) above
CharDecompositionType decompType = decompositionType(c);
if (decompType == DecompositionFont || decompType == DecompositionCompat)
return false;
return true;
}
static Widget* widgetForElement(const Element& focusedElement) {
LayoutObject* layoutObject = focusedElement.layoutObject();
if (!layoutObject || !layoutObject->isLayoutPart())
return 0;
return toLayoutPart(layoutObject)->widget();
}
static bool acceptsEditingFocus(const Element& element) {
DCHECK(hasEditableStyle(element));
return element.document().frame() && rootEditableElement(element);
}
uint64_t Document::s_globalTreeVersion = 0;
static bool s_threadedParsingEnabledForTesting = true;
// This doesn't work with non-Document ExecutionContext.
static void runAutofocusTask(ExecutionContext* context) {
Document* document = toDocument(context);
if (Element* element = document->autofocusElement()) {
document->setAutofocusElement(0);
element->focus();
}
}
static void recordLoadReasonToHistogram(WouldLoadReason reason) {
DEFINE_STATIC_LOCAL(
EnumerationHistogram, unseenFrameHistogram,
("Navigation.DeferredDocumentLoading.StatesV3", WouldLoadReasonEnd));
unseenFrameHistogram.count(reason);
}
Document::Document(const DocumentInit& initializer,
DocumentClassFlags documentClasses)
: ContainerNode(0, CreateDocument),
TreeScope(*this),
m_hasNodesWithPlaceholderStyle(false),
m_evaluateMediaQueriesOnStyleRecalc(false),
m_pendingSheetLayout(NoLayoutWithPendingSheets),
m_frame(initializer.frame()),
// TODO(dcheng): Why does this need both a LocalFrame and LocalDOMWindow
// pointer?
m_domWindow(m_frame ? m_frame->domWindow() : nullptr),
m_importsController(this, initializer.importsController()),
m_contextFeatures(ContextFeatures::defaultSwitch()),
m_wellFormed(false),
m_implementation(this, nullptr),
m_printing(NotPrinting),
m_paginatedForScreen(false),
m_compatibilityMode(NoQuirksMode),
m_compatibilityModeLocked(false),
m_hasAutofocused(false),
m_clearFocusedElementTimer(
TaskRunnerHelper::get(TaskType::UnspecedTimer, this),
this,
&Document::clearFocusedElementTimerFired),
m_domTreeVersion(++s_globalTreeVersion),
m_styleVersion(0),
m_listenerTypes(0),
m_mutationObserverTypes(0),
m_styleEngine(this, nullptr),
m_styleSheetList(this, nullptr),
m_visitedLinkState(VisitedLinkState::create(*this)),
m_visuallyOrdered(false),
m_readyState(Complete),
m_parsingState(FinishedParsing),
m_gotoAnchorNeededAfterStylesheetsLoad(false),
m_containsValidityStyleRules(false),
m_containsPlugins(false),
m_updateFocusAppearanceSelectionBahavior(SelectionBehaviorOnFocus::Reset),
m_ignoreDestructiveWriteCount(0),
m_throwOnDynamicMarkupInsertionCount(0),
m_markers(new DocumentMarkerController(*this)),
m_updateFocusAppearanceTimer(
TaskRunnerHelper::get(TaskType::UnspecedTimer, this),
this,
&Document::updateFocusAppearanceTimerFired),
m_cssTarget(nullptr),
m_loadEventProgress(LoadEventNotRun),
m_startTime(currentTime()),
m_scriptRunner(ScriptRunner::create(this)),
m_xmlVersion("1.0"),
m_xmlStandalone(StandaloneUnspecified),
m_hasXMLDeclaration(0),
m_designMode(false),
m_isRunningExecCommand(false),
m_hasReceivedUserGesture(false),
m_hasAnnotatedRegions(false),
m_annotatedRegionsDirty(false),
m_documentClasses(documentClasses),
m_isViewSource(false),
m_sawElementsInKnownNamespaces(false),
m_isSrcdocDocument(false),
m_isMobileDocument(false),
m_layoutView(0),
m_contextDocument(initializer.contextDocument()),
m_hasFullscreenSupplement(false),
m_loadEventDelayCount(0),
m_loadEventDelayTimer(TaskRunnerHelper::get(TaskType::Networking, this),
this,
&Document::loadEventDelayTimerFired),
m_pluginLoadingTimer(
TaskRunnerHelper::get(TaskType::UnspecedLoading, this),
this,
&Document::pluginLoadingTimerFired),
m_documentTiming(*this),
m_writeRecursionIsTooDeep(false),
m_writeRecursionDepth(0),
m_registrationContext(initializer.registrationContext(this)),
m_elementDataCacheClearTimer(
TaskRunnerHelper::get(TaskType::UnspecedTimer, this),
this,
&Document::elementDataCacheClearTimerFired),
m_timeline(DocumentTimeline::create(this)),
m_compositorPendingAnimations(new CompositorPendingAnimations(*this)),
m_templateDocumentHost(nullptr),
m_didAssociateFormControlsTimer(
TaskRunnerHelper::get(TaskType::UnspecedLoading, this),
this,
&Document::didAssociateFormControlsTimerFired),
m_timers(TaskRunnerHelper::get(TaskType::Timer, this)),
m_hasViewportUnits(false),
m_parserSyncPolicy(AllowAsynchronousParsing),
m_nodeCount(0),
m_wouldLoadReason(Created),
m_passwordCount(0),
m_engagementLevel(mojom::blink::EngagementLevel::NONE) {
if (m_frame) {
DCHECK(m_frame->page());
provideContextFeaturesToDocumentFrom(*this, *m_frame->page());
m_fetcher = m_frame->loader().documentLoader()->fetcher();
FrameFetchContext::provideDocumentToContext(m_fetcher->context(), this);
// TODO(dcheng): Why does this need to check that DOMWindow is non-null?
CustomElementRegistry* registry =
m_frame->domWindow() ? m_frame->domWindow()->maybeCustomElements()
: nullptr;
if (registry && m_registrationContext)
registry->entangle(m_registrationContext);
} else if (m_importsController) {
m_fetcher = FrameFetchContext::createFetcherFromDocument(this);
} else {
m_fetcher = ResourceFetcher::create(nullptr);
}
DCHECK(m_fetcher);
m_rootScrollerController = RootScrollerController::create(*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 (initializer.shouldSetURL())
setURL(initializer.url());
initSecurityContext(initializer);
initDNSPrefetch();
InstanceCounters::incrementCounter(InstanceCounters::DocumentCounter);
m_lifecycle.advanceTo(DocumentLifecycle::Inactive);
// Since CSSFontSelector requires Document::m_fetcher and StyleEngine owns
// CSSFontSelector, need to initialize m_styleEngine after initializing
// m_fetcher.
m_styleEngine = StyleEngine::create(*this);
// The parent's parser should be suspended together with all the other
// objects, else this new Document would have a new ExecutionContext which
// suspended state would not match the one from the parent, and could start
// loading resources ignoring the defersLoading flag.
DCHECK(!parentDocument() || !parentDocument()->isContextSuspended());
#ifndef NDEBUG
liveDocumentSet().add(this);
#endif
}
Document::~Document() {
DCHECK(layoutViewItem().isNull());
DCHECK(!parentTreeScope());
// If a top document with a cache, verify that it was comprehensively
// cleared during detach.
DCHECK(!m_axObjectCache);
InstanceCounters::decrementCounter(InstanceCounters::DocumentCounter);
}
SelectorQueryCache& Document::selectorQueryCache() {
if (!m_selectorQueryCache)
m_selectorQueryCache = WTF::makeUnique<SelectorQueryCache>();
return *m_selectorQueryCache;
}
MediaQueryMatcher& Document::mediaQueryMatcher() {
if (!m_mediaQueryMatcher)
m_mediaQueryMatcher = MediaQueryMatcher::create(*this);
return *m_mediaQueryMatcher;
}
void Document::mediaQueryAffectingValueChanged() {
styleEngine().mediaQueryAffectingValueChanged();
if (needsLayoutTreeUpdate())
m_evaluateMediaQueriesOnStyleRecalc = true;
else
evaluateMediaQueryList();
InspectorInstrumentation::mediaQueryResultChanged(this);
}
void Document::setCompatibilityMode(CompatibilityMode mode) {
if (m_compatibilityModeLocked || mode == m_compatibilityMode)
return;
m_compatibilityMode = mode;
selectorQueryCache().invalidate();
}
String Document::compatMode() const {
return inQuirksMode() ? "BackCompat" : "CSS1Compat";
}
void Document::setDoctype(DocumentType* docType) {
// This should never be called more than once.
DCHECK(!m_docType || !docType);
m_docType = docType;
if (m_docType) {
this->adoptIfNeeded(*m_docType);
if (m_docType->publicId().startsWith("-//wapforum//dtd xhtml mobile 1.",
TextCaseASCIIInsensitive)) {
m_isMobileDocument = true;
m_styleEngine->viewportRulesChanged();
}
}
}
DOMImplementation& Document::implementation() {
if (!m_implementation)
m_implementation = DOMImplementation::create(*this);
return *m_implementation;
}
bool Document::hasAppCacheManifest() const {
return isHTMLHtmlElement(documentElement()) &&
documentElement()->hasAttribute(manifestAttr);
}
Location* Document::location() const {
if (!frame())
return 0;
return domWindow()->location();
}
void Document::childrenChanged(const ChildrenChange& change) {
ContainerNode::childrenChanged(change);
m_documentElement = ElementTraversal::firstWithin(*this);
// For non-HTML documents the willInsertBody notification won't happen
// so we resume as soon as we have a document element. Even for XHTML
// documents there may never be a <body> (since the parser won't always
// insert one), so we resume here too. That does mean XHTML documents make
// frames when there's only a <head>, but such documents are pretty rare.
if (m_documentElement && !isHTMLDocument())
beginLifecycleUpdatesIfRenderingReady();
}
void Document::setRootScroller(Element* newScroller,
ExceptionState& exceptionState) {
m_rootScrollerController->set(newScroller);
}
Element* Document::rootScroller() const {
return m_rootScrollerController->get();
}
bool Document::isInMainFrame() const {
return frame() && frame()->isMainFrame();
}
AtomicString Document::convertLocalName(const AtomicString& name) {
return isHTMLDocument() ? name.lower() : name;
}
// https://dom.spec.whatwg.org/#dom-document-createelement
Element* Document::createElement(const AtomicString& name,
ExceptionState& exceptionState) {
if (!isValidName(name)) {
exceptionState.throwDOMException(
InvalidCharacterError,
"The tag name provided ('" + name + "') is not a valid name.");
return nullptr;
}
if (isXHTMLDocument() || isHTMLDocument()) {
// 2. If the context object is an HTML document, let localName be
// converted to ASCII lowercase.
AtomicString localName = convertLocalName(name);
if (CustomElement::shouldCreateCustomElement(localName)) {
return CustomElement::createCustomElementSync(
*this,
QualifiedName(nullAtom, localName, HTMLNames::xhtmlNamespaceURI));
}
return HTMLElementFactory::createHTMLElement(localName, *this,
CreatedByCreateElement);
}
return Element::create(QualifiedName(nullAtom, name, nullAtom), this);
}
String getTypeExtension(Document* document,
const StringOrDictionary& stringOrOptions,
ExceptionState& exceptionState) {
if (stringOrOptions.isNull())
return emptyString();
if (stringOrOptions.isString()) {
UseCounter::count(document,
UseCounter::DocumentCreateElement2ndArgStringHandling);
return stringOrOptions.getAsString();
}
if (stringOrOptions.isDictionary()) {
Dictionary dict = stringOrOptions.getAsDictionary();
ElementCreationOptions impl;
V8ElementCreationOptions::toImpl(dict.isolate(), dict.v8Value(), impl,
exceptionState);
if (impl.hasIs())
return impl.is();
return toCoreString(dict.v8Value()->ToString());
}
return emptyString();
}
// https://dom.spec.whatwg.org/#dom-document-createelement
Element* Document::createElement(const AtomicString& localName,
const StringOrDictionary& stringOrOptions,
ExceptionState& exceptionState) {
// 1. If localName does not match Name production, throw InvalidCharacterError
if (!isValidName(localName)) {
exceptionState.throwDOMException(
InvalidCharacterError,
"The tag name provided ('" + localName + "') is not a valid name.");
return nullptr;
}
// 2. localName converted to ASCII lowercase
const AtomicString& convertedLocalName = convertLocalName(localName);
bool isV1 = stringOrOptions.isDictionary() || !registrationContext();
bool createV1Builtin = stringOrOptions.isDictionary() &&
RuntimeEnabledFeatures::customElementsBuiltinEnabled();
bool shouldCreateBuiltin = createV1Builtin || stringOrOptions.isString();
// 3.
const AtomicString& is =
AtomicString(getTypeExtension(this, stringOrOptions, exceptionState));
const AtomicString& name = shouldCreateBuiltin ? is : convertedLocalName;
// 4. Let definition be result of lookup up custom element definition
CustomElementDefinition* definition = nullptr;
if (isV1) {
// Is the runtime flag enabled for customized builtin elements?
const CustomElementDescriptor desc =
RuntimeEnabledFeatures::customElementsBuiltinEnabled()
? CustomElementDescriptor(name, convertedLocalName)
: CustomElementDescriptor(convertedLocalName, convertedLocalName);
if (CustomElementRegistry* registry = CustomElement::registry(*this))
definition = registry->definitionFor(desc);
// 5. If 'is' is non-null and definition is null, throw NotFoundError
// TODO(yurak): update when https://github.com/w3c/webcomponents/issues/608
// is resolved
if (!definition && createV1Builtin) {
exceptionState.throwDOMException(NotFoundError,
"Custom element definition not found.");
return nullptr;
}
}
// 7. Let element be the result of creating an element
Element* element;
if (definition) {
element = CustomElement::createCustomElementSync(*this, convertedLocalName,
definition);
} else if (V0CustomElement::isValidName(localName) && registrationContext()) {
element = registrationContext()->createCustomTagElement(
*this, QualifiedName(nullAtom, convertedLocalName, xhtmlNamespaceURI));
} else {
element = createElement(localName, exceptionState);
if (exceptionState.hadException())
return nullptr;
}
// 8. If 'is' is non-null, set 'is' attribute
if (!is.isEmpty()) {
if (stringOrOptions.isString()) {
V0CustomElementRegistrationContext::setIsAttributeAndTypeExtension(
element, is);
} else if (stringOrOptions.isDictionary()) {
element->setAttribute(HTMLNames::isAttr, is);
}
}
return element;
}
static inline QualifiedName createQualifiedName(
const AtomicString& namespaceURI,
const AtomicString& qualifiedName,
ExceptionState& exceptionState) {
AtomicString prefix, localName;
if (!Document::parseQualifiedName(qualifiedName, prefix, localName,
exceptionState))
return QualifiedName::null();
QualifiedName qName(prefix, localName, namespaceURI);
if (!Document::hasValidNamespaceForElements(qName)) {
exceptionState.throwDOMException(
NamespaceError,
"The namespace URI provided ('" + namespaceURI +
"') is not valid for the qualified name provided ('" +
qualifiedName + "').");
return QualifiedName::null();
}
return qName;
}
Element* Document::createElementNS(const AtomicString& namespaceURI,
const AtomicString& qualifiedName,
ExceptionState& exceptionState) {
QualifiedName qName(
createQualifiedName(namespaceURI, qualifiedName, exceptionState));
if (qName == QualifiedName::null())
return nullptr;
if (CustomElement::shouldCreateCustomElement(qName))
return CustomElement::createCustomElementSync(*this, qName);
return createElement(qName, CreatedByCreateElement);
}
// https://dom.spec.whatwg.org/#internal-createelementns-steps
Element* Document::createElementNS(const AtomicString& namespaceURI,
const AtomicString& qualifiedName,
const StringOrDictionary& stringOrOptions,
ExceptionState& exceptionState) {
// 1. Validate and extract
QualifiedName qName(
createQualifiedName(namespaceURI, qualifiedName, exceptionState));
if (qName == QualifiedName::null())
return nullptr;
bool isV1 = stringOrOptions.isDictionary() || !registrationContext();
bool createV1Builtin = stringOrOptions.isDictionary() &&
RuntimeEnabledFeatures::customElementsBuiltinEnabled();
bool shouldCreateBuiltin = createV1Builtin || stringOrOptions.isString();
// 2.
const AtomicString& is =
AtomicString(getTypeExtension(this, stringOrOptions, exceptionState));
const AtomicString& name = shouldCreateBuiltin ? is : qualifiedName;
if (!isValidName(qualifiedName)) {
exceptionState.throwDOMException(
InvalidCharacterError,
"The tag name provided ('" + qualifiedName + "') is not a valid name.");
return nullptr;
}
// 3. Let definition be result of lookup up custom element definition
CustomElementDefinition* definition = nullptr;
if (isV1) {
const CustomElementDescriptor desc =
RuntimeEnabledFeatures::customElementsBuiltinEnabled()
? CustomElementDescriptor(name, qualifiedName)
: CustomElementDescriptor(qualifiedName, qualifiedName);
if (CustomElementRegistry* registry = CustomElement::registry(*this))
definition = registry->definitionFor(desc);
// 4. If 'is' is non-null and definition is null, throw NotFoundError
if (!definition && createV1Builtin) {
exceptionState.throwDOMException(NotFoundError,
"Custom element definition not found.");
return nullptr;
}
}
// 5. Let element be the result of creating an element
Element* element;
if (CustomElement::shouldCreateCustomElement(qName) || createV1Builtin) {
element = CustomElement::createCustomElementSync(*this, qName, definition);
} else if (V0CustomElement::isValidName(qName.localName()) &&
registrationContext()) {
element = registrationContext()->createCustomTagElement(*this, qName);
} else {
element = createElement(qName, CreatedByCreateElement);
}
// 6. If 'is' is non-null, set 'is' attribute
if (!is.isEmpty()) {
if (element->getCustomElementState() != CustomElementState::Custom) {
V0CustomElementRegistrationContext::setIsAttributeAndTypeExtension(
element, is);
} else if (stringOrOptions.isDictionary()) {
element->setAttribute(HTMLNames::isAttr, is);
}
}
return element;
}
ScriptValue Document::registerElement(ScriptState* scriptState,
const AtomicString& name,
const ElementRegistrationOptions& options,
ExceptionState& exceptionState,
V0CustomElement::NameSet validNames) {
HostsUsingFeatures::countMainWorldOnly(
scriptState, *this, HostsUsingFeatures::Feature::DocumentRegisterElement);
if (!registrationContext()) {
exceptionState.throwDOMException(
NotSupportedError, "No element registration context is available.");
return ScriptValue();
}
V0CustomElementConstructorBuilder constructorBuilder(scriptState, options);
registrationContext()->registerElement(this, &constructorBuilder, name,
validNames, exceptionState);
return constructorBuilder.bindingsReturnValue();
}
V0CustomElementMicrotaskRunQueue* Document::customElementMicrotaskRunQueue() {
if (!m_customElementMicrotaskRunQueue)
m_customElementMicrotaskRunQueue =
V0CustomElementMicrotaskRunQueue::create();
return m_customElementMicrotaskRunQueue.get();
}
void Document::clearImportsController() {
m_importsController = nullptr;
if (!loader())
m_fetcher->clearContext();
}
void Document::createImportsController() {
DCHECK(!m_importsController);
m_importsController = HTMLImportsController::create(*this);
}
HTMLImportLoader* Document::importLoader() const {
if (!m_importsController)
return 0;
return m_importsController->loaderFor(*this);
}
bool Document::haveImportsLoaded() const {
if (!m_importsController)
return true;
return !m_importsController->shouldBlockScriptExecution(*this);
}
LocalDOMWindow* Document::executingWindow() const {
if (LocalDOMWindow* owningWindow = domWindow())
return owningWindow;
if (HTMLImportsController* import = this->importsController())
return import->master()->domWindow();
return 0;
}
LocalFrame* Document::executingFrame() {
LocalDOMWindow* window = executingWindow();
if (!window)
return 0;
return window->frame();
}
DocumentFragment* Document::createDocumentFragment() {
return DocumentFragment::create(*this);
}
Text* Document::createTextNode(const String& data) {
return Text::create(*this, data);
}
Comment* Document::createComment(const String& data) {
return Comment::create(*this, data);
}
CDATASection* Document::createCDATASection(const String& data,
ExceptionState& exceptionState) {
if (isHTMLDocument()) {
exceptionState.throwDOMException(
NotSupportedError,
"This operation is not supported for HTML documents.");
return nullptr;
}
if (data.contains("]]>")) {
exceptionState.throwDOMException(InvalidCharacterError,
"String cannot contain ']]>' since that "
"is the end delimiter of a CData "
"section.");
return nullptr;
}
return CDATASection::create(*this, data);
}
ProcessingInstruction* Document::createProcessingInstruction(
const String& target,
const String& data,
ExceptionState& exceptionState) {
if (!isValidName(target)) {
exceptionState.throwDOMException(
InvalidCharacterError,
"The target provided ('" + target + "') is not a valid name.");
return nullptr;
}
if (data.contains("?>")) {
exceptionState.throwDOMException(
InvalidCharacterError,
"The data provided ('" + data + "') contains '?>'.");
return nullptr;
}
return ProcessingInstruction::create(*this, target, data);
}
Text* Document::createEditingTextNode(const String& text) {
return Text::createEditingText(*this, text);
}
bool Document::importContainerNodeChildren(ContainerNode* oldContainerNode,
ContainerNode* newContainerNode,
ExceptionState& exceptionState) {
for (Node& oldChild : NodeTraversal::childrenOf(*oldContainerNode)) {
Node* newChild = importNode(&oldChild, true, exceptionState);
if (exceptionState.hadException())
return false;
newContainerNode->appendChild(newChild, exceptionState);
if (exceptionState.hadException())
return false;
}
return true;
}
Node* Document::importNode(Node* importedNode,
bool deep,
ExceptionState& exceptionState) {
switch (importedNode->getNodeType()) {
case kTextNode:
return createTextNode(importedNode->nodeValue());
case kCdataSectionNode:
return CDATASection::create(*this, importedNode->nodeValue());
case kProcessingInstructionNode:
return createProcessingInstruction(
importedNode->nodeName(), importedNode->nodeValue(), exceptionState);
case kCommentNode:
return createComment(importedNode->nodeValue());
case kDocumentTypeNode: {
DocumentType* doctype = toDocumentType(importedNode);
return DocumentType::create(this, doctype->name(), doctype->publicId(),
doctype->systemId());
}
case kElementNode: {
Element* oldElement = toElement(importedNode);
// FIXME: The following check might be unnecessary. Is it possible that
// oldElement has mismatched prefix/namespace?
if (!hasValidNamespaceForElements(oldElement->tagQName())) {
exceptionState.throwDOMException(
NamespaceError, "The imported node has an invalid namespace.");
return nullptr;
}
Element* newElement =
createElement(oldElement->tagQName(), CreatedByImportNode);
newElement->cloneDataFromElement(*oldElement);
if (deep) {
if (!importContainerNodeChildren(oldElement, newElement,
exceptionState))
return nullptr;
if (isHTMLTemplateElement(*oldElement) &&
!ensureTemplateDocument().importContainerNodeChildren(
toHTMLTemplateElement(oldElement)->content(),
toHTMLTemplateElement(newElement)->content(), exceptionState))
return nullptr;
}
return newElement;
}
case kAttributeNode:
return Attr::create(
*this,
QualifiedName(nullAtom, AtomicString(toAttr(importedNode)->name()),
nullAtom),
toAttr(importedNode)->value());
case kDocumentFragmentNode: {
if (importedNode->isShadowRoot()) {
// ShadowRoot nodes should not be explicitly importable.
// Either they are imported along with their host node, or created
// implicitly.
exceptionState.throwDOMException(
NotSupportedError,
"The node provided is a shadow root, which may not be imported.");
return nullptr;
}
DocumentFragment* oldFragment = toDocumentFragment(importedNode);
DocumentFragment* newFragment = createDocumentFragment();
if (deep &&
!importContainerNodeChildren(oldFragment, newFragment,
exceptionState))
return nullptr;
return newFragment;
}
case kDocumentNode:
exceptionState.throwDOMException(
NotSupportedError,
"The node provided is a document, which may not be imported.");
return nullptr;
}
NOTREACHED();
return nullptr;
}
Node* Document::adoptNode(Node* source, ExceptionState& exceptionState) {
EventQueueScope scope;
switch (source->getNodeType()) {
case kDocumentNode:
exceptionState.throwDOMException(NotSupportedError,
"The node provided is of type '" +
source->nodeName() +
"', which may not be adopted.");
return nullptr;
case kAttributeNode: {
Attr* attr = toAttr(source);
if (Element* ownerElement = attr->ownerElement())
ownerElement->removeAttributeNode(attr, exceptionState);
break;
}
default:
if (source->isShadowRoot()) {
// ShadowRoot cannot disconnect itself from the host node.
exceptionState.throwDOMException(
HierarchyRequestError,
"The node provided is a shadow root, which may not be adopted.");
return nullptr;
}
if (source->isFrameOwnerElement()) {
HTMLFrameOwnerElement* frameOwnerElement =
toHTMLFrameOwnerElement(source);
if (frame() &&
frame()->tree().isDescendantOf(frameOwnerElement->contentFrame())) {
exceptionState.throwDOMException(
HierarchyRequestError,
"The node provided is a frame which contains this document.");
return nullptr;
}
}
if (source->parentNode()) {
source->parentNode()->removeChild(source, exceptionState);
if (exceptionState.hadException())
return nullptr;
RELEASE_ASSERT(!source->parentNode());
}
}
this->adoptIfNeeded(*source);
return source;
}
bool Document::hasValidNamespaceForElements(const QualifiedName& qName) {
// These checks are from DOM Core Level 2, createElementNS
// http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-DocCrElNS
// createElementNS(null, "html:div")
if (!qName.prefix().isEmpty() && qName.namespaceURI().isNull())
return false;
// createElementNS("http://www.example.com", "xml:lang")
if (qName.prefix() == xmlAtom &&
qName.namespaceURI() != XMLNames::xmlNamespaceURI)
return false;
// Required by DOM Level 3 Core and unspecified by DOM Level 2 Core:
// http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#ID-DocCrElNS
// createElementNS("http://www.w3.org/2000/xmlns/", "foo:bar"),
// createElementNS(null, "xmlns:bar"), createElementNS(null, "xmlns")
if (qName.prefix() == xmlnsAtom ||
(qName.prefix().isEmpty() && qName.localName() == xmlnsAtom))
return qName.namespaceURI() == XMLNSNames::xmlnsNamespaceURI;
return qName.namespaceURI() != XMLNSNames::xmlnsNamespaceURI;
}
bool Document::hasValidNamespaceForAttributes(const QualifiedName& qName) {
return hasValidNamespaceForElements(qName);
}
// FIXME: This should really be in a possible ElementFactory class
Element* Document::createElement(const QualifiedName& qName,
CreateElementFlags flags) {
Element* e = nullptr;
// FIXME: Use registered namespaces and look up in a hash to find the right
// factory.
if (qName.namespaceURI() == xhtmlNamespaceURI)
e = HTMLElementFactory::createHTMLElement(qName.localName(), *this, flags);
else if (qName.namespaceURI() == SVGNames::svgNamespaceURI)
e = SVGElementFactory::createSVGElement(qName.localName(), *this, flags);
if (e)
m_sawElementsInKnownNamespaces = true;
else
e = Element::create(qName, this);
if (e->prefix() != qName.prefix())
e->setTagNameForCreateElementNS(qName);
DCHECK(qName == e->tagQName());
return e;
}
String Document::readyState() const {
DEFINE_STATIC_LOCAL(const String, loading, ("loading"));
DEFINE_STATIC_LOCAL(const String, interactive, ("interactive"));
DEFINE_STATIC_LOCAL(const String, complete, ("complete"));
switch (m_readyState) {
case Loading:
return loading;
case Interactive:
return interactive;
case Complete:
return complete;
}
NOTREACHED();
return String();
}
void Document::setReadyState(DocumentReadyState readyState) {
if (readyState == m_readyState)
return;
switch (readyState) {
case Loading:
if (!m_documentTiming.domLoading()) {
m_documentTiming.markDomLoading();
}
break;
case Interactive:
if (!m_documentTiming.domInteractive())
m_documentTiming.markDomInteractive();
break;
case Complete:
if (!m_documentTiming.domComplete())
m_documentTiming.markDomComplete();
break;
}
m_readyState = readyState;
dispatchEvent(Event::create(EventTypeNames::readystatechange));
}
bool Document::isLoadCompleted() {
return m_readyState == Complete;
}
AtomicString Document::encodingName() const {
// TextEncoding::name() returns a char*, no need to allocate a new
// String for it each time.
// FIXME: We should fix TextEncoding to speak AtomicString anyway.
return AtomicString(encoding().name());
}
void Document::setContentLanguage(const AtomicString& language) {
if (m_contentLanguage == language)
return;
m_contentLanguage = language;
// Document's style depends on the content language.
setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(
StyleChangeReason::Language));
}
void Document::setXMLVersion(const String& version,
ExceptionState& exceptionState) {
if (!XMLDocumentParser::supportsXMLVersion(version)) {
exceptionState.throwDOMException(
NotSupportedError,
"This document does not support the XML version '" + version + "'.");
return;
}
m_xmlVersion = version;
}
void Document::setXMLStandalone(bool standalone,
ExceptionState& exceptionState) {
m_xmlStandalone = standalone ? Standalone : NotStandalone;
}
void Document::setContent(const String& content) {
open();
m_parser->append(content);
close();
}
String Document::suggestedMIMEType() const {
if (isXMLDocument()) {
if (isXHTMLDocument())
return "application/xhtml+xml";
if (isSVGDocument())
return "image/svg+xml";
return "application/xml";
}
if (xmlStandalone())
return "text/xml";
if (isHTMLDocument())
return "text/html";
if (DocumentLoader* documentLoader = loader())
return documentLoader->responseMIMEType();
return String();
}
void Document::setMimeType(const AtomicString& mimeType) {
m_mimeType = mimeType;
}
AtomicString Document::contentType() const {
if (!m_mimeType.isEmpty())
return m_mimeType;
if (DocumentLoader* documentLoader = loader())
return documentLoader->mimeType();
String mimeType = suggestedMIMEType();
if (!mimeType.isEmpty())
return AtomicString(mimeType);
return AtomicString("application/xml");
}
Element* Document::elementFromPoint(int x, int y) const {
if (layoutViewItem().isNull())
return 0;
return TreeScope::elementFromPoint(x, y);
}
HeapVector<Member<Element>> Document::elementsFromPoint(int x, int y) const {
if (layoutViewItem().isNull())
return HeapVector<Member<Element>>();
return TreeScope::elementsFromPoint(x, y);
}
Range* Document::caretRangeFromPoint(int x, int y) {
if (layoutViewItem().isNull())
return nullptr;
HitTestResult result = hitTestInDocument(this, x, y);
PositionWithAffinity positionWithAffinity = result.position();
if (positionWithAffinity.isNull())
return nullptr;
Position rangeCompliantPosition =
positionWithAffinity.position().parentAnchoredEquivalent();
return Range::createAdjustedToTreeScope(*this, rangeCompliantPosition);
}
Element* Document::scrollingElement() {
if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled() && inQuirksMode())
updateStyleAndLayoutTree();
return scrollingElementNoLayout();
}
Element* Document::scrollingElementNoLayout() {
if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
if (inQuirksMode()) {
DCHECK(m_lifecycle.state() >= DocumentLifecycle::StyleClean);
HTMLBodyElement* body = firstBodyElement();
if (body && body->layoutObject() &&
body->layoutObject()->hasOverflowClip())
return nullptr;
return body;
}
return documentElement();
}
return body();
}
// We use HashMap::set over HashMap::add here as we want to
// replace the ComputedStyle but not the Node if the Node is
// already present.
void Document::addStyleReattachData(Node& node,
StyleReattachData& styleReattachData) {
DCHECK(node.isElementNode() || node.isTextNode());
m_styleReattachDataMap.set(&node, styleReattachData);
}
StyleReattachData Document::getStyleReattachData(Node& node) {
return m_styleReattachDataMap.get(&node);
}
/*
* Performs three operations:
* 1. Convert control characters to spaces
* 2. Trim leading and trailing spaces
* 3. Collapse internal whitespace.
*/
template <typename CharacterType>
static inline String canonicalizedTitle(Document* document,
const String& title) {
unsigned length = title.length();
unsigned builderIndex = 0;
const CharacterType* characters = title.getCharacters<CharacterType>();
StringBuffer<CharacterType> buffer(length);
// Replace control characters with spaces and collapse whitespace.
bool pendingWhitespace = false;
for (unsigned i = 0; i < length; ++i) {
UChar32 c = characters[i];
if ((c <= spaceCharacter && c != lineTabulationCharacter) ||
c == deleteCharacter) {
if (builderIndex != 0)
pendingWhitespace = true;
} else {
if (pendingWhitespace) {
buffer[builderIndex++] = ' ';
pendingWhitespace = false;
}
buffer[builderIndex++] = c;
}
}
buffer.shrink(builderIndex);
return String::adopt(buffer);
}
void Document::updateTitle(const String& title) {
if (m_rawTitle == title)
return;
m_rawTitle = title;
String oldTitle = m_title;
if (m_rawTitle.isEmpty())
m_title = String();
else if (m_rawTitle.is8Bit())
m_title = canonicalizedTitle<LChar>(this, m_rawTitle);
else
m_title = canonicalizedTitle<UChar>(this, m_rawTitle);
if (!m_frame || oldTitle == m_title)
return;
m_frame->loader().client()->dispatchDidReceiveTitle(m_title);
}
void Document::setTitle(const String& title) {
// Title set by JavaScript -- overrides any title elements.
if (!m_titleElement) {
if (isHTMLDocument() || isXHTMLDocument()) {
HTMLElement* headElement = head();
if (!headElement)
return;
m_titleElement = HTMLTitleElement::create(*this);
headElement->appendChild(m_titleElement.get());
} else if (isSVGDocument()) {
Element* element = documentElement();
if (!isSVGSVGElement(element))
return;
m_titleElement = SVGTitleElement::create(*this);
element->insertBefore(m_titleElement.get(), element->firstChild());
}
} else {
if (!isHTMLDocument() && !isXHTMLDocument() && !isSVGDocument())
m_titleElement = nullptr;
}
if (isHTMLTitleElement(m_titleElement))
toHTMLTitleElement(m_titleElement)->setText(title);
else if (isSVGTitleElement(m_titleElement))
toSVGTitleElement(m_titleElement)->setText(title);
else
updateTitle(title);
}
void Document::setTitleElement(Element* titleElement) {
// If the root element is an svg element in the SVG namespace, then let value
// be the child text content of the first title element in the SVG namespace
// that is a child of the root element.
if (isSVGSVGElement(documentElement())) {
m_titleElement = Traversal<SVGTitleElement>::firstChild(*documentElement());
} else {
if (m_titleElement && m_titleElement != titleElement)
m_titleElement = Traversal<HTMLTitleElement>::firstWithin(*this);
else
m_titleElement = titleElement;
// If the root element isn't an svg element in the SVG namespace and the
// title element is in the SVG namespace, it is ignored.
if (isSVGTitleElement(m_titleElement)) {
m_titleElement = nullptr;
return;
}
}
if (isHTMLTitleElement(m_titleElement))
updateTitle(toHTMLTitleElement(m_titleElement)->text());
else if (isSVGTitleElement(m_titleElement))
updateTitle(toSVGTitleElement(m_titleElement)->textContent());
}
void Document::removeTitle(Element* titleElement) {
if (m_titleElement != titleElement)
return;
m_titleElement = nullptr;
// Update title based on first title element in the document, if one exists.
if (isHTMLDocument() || isXHTMLDocument()) {
if (HTMLTitleElement* title =
Traversal<HTMLTitleElement>::firstWithin(*this))
setTitleElement(title);
} else if (isSVGDocument()) {
if (SVGTitleElement* title = Traversal<SVGTitleElement>::firstWithin(*this))
setTitleElement(title);
}
if (!m_titleElement)
updateTitle(String());
}
const AtomicString& Document::dir() {
Element* rootElement = documentElement();
if (isHTMLHtmlElement(rootElement))
return toHTMLHtmlElement(rootElement)->dir();
return nullAtom;
}
void Document::setDir(const AtomicString& value) {
Element* rootElement = documentElement();
if (isHTMLHtmlElement(rootElement))
toHTMLHtmlElement(rootElement)->setDir(value);
}
PageVisibilityState Document::pageVisibilityState() const {
// The visibility of the document is inherited from the visibility of the
// page. If there is no page associated with the document, we will assume
// that the page is hidden, as specified by the spec:
// https://w3c.github.io/page-visibility/#hidden-attribute
if (!m_frame || !m_frame->page())
return PageVisibilityStateHidden;
// While visibilitychange is being dispatched during unloading it is
// expected that the visibility is hidden regardless of the page's
// visibility.
if (m_loadEventProgress >= UnloadVisibilityChangeInProgress)
return PageVisibilityStateHidden;
return m_frame->page()->visibilityState();
}
bool Document::isPrefetchOnly() const {
if (!m_frame || !m_frame->page())
return false;
PrerendererClient* prerendererClient =
PrerendererClient::from(m_frame->page());
return prerendererClient && prerendererClient->isPrefetchOnly();
}
String Document::visibilityState() const {
return pageVisibilityStateString(pageVisibilityState());
}
bool Document::hidden() const {
return pageVisibilityState() != PageVisibilityStateVisible;
}
void Document::didChangeVisibilityState() {
dispatchEvent(Event::createBubble(EventTypeNames::visibilitychange));
// Also send out the deprecated version until it can be removed.
dispatchEvent(Event::createBubble(EventTypeNames::webkitvisibilitychange));
if (pageVisibilityState() == PageVisibilityStateVisible)
timeline().setAllCompositorPending();
if (hidden() && m_canvasFontCache)
m_canvasFontCache->pruneAll();
}
String Document::nodeName() const {
return "#document";
}
Node::NodeType Document::getNodeType() const {
return kDocumentNode;
}
FormController& Document::formController() {
if (!m_formController) {
m_formController = FormController::create();
if (m_frame && m_frame->loader().currentItem() &&
m_frame->loader().currentItem()->isCurrentDocument(this))
m_frame->loader().currentItem()->setDocumentState(
m_formController->formElementsState());
}
return *m_formController;
}
DocumentState* Document::formElementsState() const {
if (!m_formController)
return 0;
return m_formController->formElementsState();
}
void Document::setStateForNewFormElements(const Vector<String>& stateVector) {
if (!stateVector.size() && !m_formController)
return;
formController().setStateForNewFormElements(stateVector);
}
FrameView* Document::view() const {
return m_frame ? m_frame->view() : nullptr;
}
Page* Document::page() const {
return m_frame ? m_frame->page() : nullptr;
}
FrameHost* Document::frameHost() const {
return m_frame ? m_frame->host() : nullptr;
}
Settings* Document::settings() const {
return m_frame ? m_frame->settings() : nullptr;
}
Range* Document::createRange() {
return Range::create(*this);
}
NodeIterator* Document::createNodeIterator(Node* root,
unsigned whatToShow,
NodeFilter* filter) {
DCHECK(root);
return NodeIterator::create(root, whatToShow, filter);
}
TreeWalker* Document::createTreeWalker(Node* root,
unsigned whatToShow,
NodeFilter* filter) {
DCHECK(root);
return TreeWalker::create(root, whatToShow, filter);
}
bool Document::needsLayoutTreeUpdate() const {
if (!isActive() || !view())
return false;
if (needsFullLayoutTreeUpdate())
return true;
if (childNeedsStyleRecalc())
return true;
if (childNeedsStyleInvalidation())
return true;
if (layoutViewItem().wasNotifiedOfSubtreeChange())
return true;
return false;
}
bool Document::needsFullLayoutTreeUpdate() const {
if (!isActive() || !view())
return false;
if (m_styleEngine->needsActiveStyleUpdate())
return true;
if (!m_useElementsNeedingUpdate.isEmpty())
return true;
if (needsStyleRecalc())
return true;
if (needsStyleInvalidation())
return true;
// FIXME: The childNeedsDistributionRecalc bit means either self or children,
// we should fix that.
if (childNeedsDistributionRecalc())
return true;
if (DocumentAnimations::needsAnimationTimingUpdate(*this))
return true;
return false;
}
bool Document::shouldScheduleLayoutTreeUpdate() const {
if (!isActive())
return false;
if (inStyleRecalc())
return false;
// InPreLayout will recalc style itself. There's no reason to schedule another
// recalc.
if (m_lifecycle.state() == DocumentLifecycle::InPreLayout)
return false;
if (!shouldScheduleLayout())
return false;
return true;
}
void Document::scheduleLayoutTreeUpdate() {
DCHECK(!hasPendingVisualUpdate());
DCHECK(shouldScheduleLayoutTreeUpdate());
DCHECK(needsLayoutTreeUpdate());
if (!view()->canThrottleRendering())
page()->animator().scheduleVisualUpdate(frame());
m_lifecycle.ensureStateAtMost(DocumentLifecycle::VisualUpdatePending);
TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"),
"ScheduleStyleRecalculation", TRACE_EVENT_SCOPE_THREAD,
"data", InspectorRecalculateStylesEvent::data(frame()));
InspectorInstrumentation::didScheduleStyleRecalculation(this);
++m_styleVersion;
}
bool Document::hasPendingForcedStyleRecalc() const {
return hasPendingVisualUpdate() && !inStyleRecalc() &&
getStyleChangeType() >= SubtreeStyleChange;
}
void Document::updateStyleInvalidationIfNeeded() {
DCHECK(isActive());
ScriptForbiddenScope forbidScript;
if (!childNeedsStyleInvalidation())
return;
TRACE_EVENT0("blink", "Document::updateStyleInvalidationIfNeeded");
styleEngine().styleInvalidator().invalidate(*this);
}
void Document::setupFontBuilder(ComputedStyle& documentStyle) {
FontBuilder fontBuilder(*this);
CSSFontSelector* selector = styleEngine().fontSelector();
fontBuilder.createFontForDocument(selector, documentStyle);
}
void Document::inheritHtmlAndBodyElementStyles(StyleRecalcChange change) {
DCHECK(inStyleRecalc());
DCHECK(documentElement());
bool didRecalcDocumentElement = false;
RefPtr<ComputedStyle> documentElementStyle =
documentElement()->mutableComputedStyle();
if (change == Force)
documentElement()->clearAnimationStyleChange();
if (!documentElementStyle || documentElement()->needsStyleRecalc() ||
change == Force) {
documentElementStyle =
ensureStyleResolver().styleForElement(documentElement());
didRecalcDocumentElement = true;
}
WritingMode rootWritingMode = documentElementStyle->getWritingMode();
TextDirection rootDirection = documentElementStyle->direction();
HTMLElement* body = this->body();
RefPtr<ComputedStyle> bodyStyle;
if (body) {
bodyStyle = body->mutableComputedStyle();
if (didRecalcDocumentElement)
body->clearAnimationStyleChange();
if (!bodyStyle || body->needsStyleRecalc() || didRecalcDocumentElement)
bodyStyle = ensureStyleResolver().styleForElement(
body, documentElementStyle.get());
rootWritingMode = bodyStyle->getWritingMode();
rootDirection = bodyStyle->direction();
}
const ComputedStyle* backgroundStyle = documentElementStyle.get();
// http://www.w3.org/TR/css3-background/#body-background
// <html> root element with no background steals background from its first
// <body> child.
// Also see LayoutBoxModelObject::backgroundStolenForBeingBody()
if (isHTMLHtmlElement(documentElement()) && isHTMLBodyElement(body) &&
!backgroundStyle->hasBackground())
backgroundStyle = bodyStyle.get();
Color backgroundColor =
backgroundStyle->visitedDependentColor(CSSPropertyBackgroundColor);
FillLayer backgroundLayers = backgroundStyle->backgroundLayers();
for (auto currentLayer = &backgroundLayers; currentLayer;
currentLayer = currentLayer->next()) {
// http://www.w3.org/TR/css3-background/#root-background
// The root element background always have painting area of the whole
// canvas.
currentLayer->setClip(BorderFillBox);
// The root element doesn't scroll. It always propagates its layout overflow
// to the viewport. Positioning background against either box is equivalent
// to positioning against the scrolled box of the viewport.
if (currentLayer->attachment() == ScrollBackgroundAttachment)
currentLayer->setAttachment(LocalBackgroundAttachment);
}
EImageRendering imageRendering = backgroundStyle->imageRendering();
const ComputedStyle* overflowStyle = nullptr;
if (Element* element = viewportDefiningElement(documentElementStyle.get())) {
if (element == body) {
overflowStyle = bodyStyle.get();
} else {
DCHECK_EQ(element, documentElement());
overflowStyle = documentElementStyle.get();
// The body element has its own scrolling box, independent from the
// viewport. This is a bit of a weird edge case in the CSS spec that we
// might want to try to eliminate some day (eg. for ScrollTopLeftInterop -
// see http://crbug.com/157855).
if (bodyStyle && !bodyStyle->isOverflowVisible())
UseCounter::count(*this, UseCounter::BodyScrollsInAdditionToViewport);
}
}
// Resolved rem units are stored in the matched properties cache so we need to
// make sure to invalidate the cache if the documentElement needed to reattach
// or the font size changed and then trigger a full document recalc. We also
// need to clear it here since the call to styleForElement on the body above
// can cache bad values for rem units if the documentElement's style was
// dirty. We could keep track of which elements depend on rem units like we do
// for viewport styles, but we assume root font size changes are rare and just
// invalidate the cache for now.
if (styleEngine().usesRemUnits() &&
(documentElement()->needsAttach() ||
!documentElement()->computedStyle() ||
documentElement()->computedStyle()->fontSize() !=
documentElementStyle->fontSize())) {
ensureStyleResolver().invalidateMatchedPropertiesCache();
documentElement()->setNeedsStyleRecalc(
SubtreeStyleChange,
StyleChangeReasonForTracing::create(StyleChangeReason::FontSizeChange));
}
EOverflowAnchor overflowAnchor = EOverflowAnchor::Auto;
EOverflow overflowX = EOverflow::Auto;
EOverflow overflowY = EOverflow::Auto;
float columnGap = 0;
if (overflowStyle) {
overflowAnchor = overflowStyle->overflowAnchor();
overflowX = overflowStyle->overflowX();
overflowY = overflowStyle->overflowY();
// Visible overflow on the viewport is meaningless, and the spec says to
// treat it as 'auto':
if (overflowX == EOverflow::Visible)
overflowX = EOverflow::Auto;
if (overflowY == EOverflow::Visible)
overflowY = EOverflow::Auto;
if (overflowAnchor == EOverflowAnchor::Visible)
overflowAnchor = EOverflowAnchor::Auto;
// Column-gap is (ab)used by the current paged overflow implementation (in
// lack of other ways to specify gaps between pages), so we have to
// propagate it too.
columnGap = overflowStyle->columnGap();
}
ScrollSnapType snapType = overflowStyle->getScrollSnapType();
const LengthPoint& snapDestination = overflowStyle->scrollSnapDestination();
RefPtr<ComputedStyle> documentStyle = layoutViewItem().mutableStyle();
if (documentStyle->getWritingMode() != rootWritingMode ||
documentStyle->direction() != rootDirection ||
documentStyle->visitedDependentColor(CSSPropertyBackgroundColor) !=
backgroundColor ||
documentStyle->backgroundLayers() != backgroundLayers ||
documentStyle->imageRendering() != imageRendering ||
documentStyle->overflowAnchor() != overflowAnchor ||
documentStyle->overflowX() != overflowX ||
documentStyle->overflowY() != overflowY ||
documentStyle->columnGap() != columnGap ||
documentStyle->getScrollSnapType() != snapType ||
documentStyle->scrollSnapDestination() != snapDestination) {
RefPtr<ComputedStyle> newStyle = ComputedStyle::clone(*documentStyle);
newStyle->setWritingMode(rootWritingMode);
newStyle->setDirection(rootDirection);
newStyle->setBackgroundColor(backgroundColor);
newStyle->accessBackgroundLayers() = backgroundLayers;
newStyle->setImageRendering(imageRendering);
newStyle->setOverflowAnchor(overflowAnchor);
newStyle->setOverflowX(overflowX);
newStyle->setOverflowY(overflowY);
newStyle->setColumnGap(columnGap);
newStyle->setScrollSnapType(snapType);
newStyle->setScrollSnapDestination(snapDestination);
layoutViewItem().setStyle(newStyle);
setupFontBuilder(*newStyle);
}
if (body) {
if (const ComputedStyle* style = body->computedStyle()) {
if (style->direction() != rootDirection ||
style->getWritingMode() != rootWritingMode)
body->setNeedsStyleRecalc(SubtreeStyleChange,
StyleChangeReasonForTracing::create(
StyleChangeReason::WritingModeChange));
}
}
if (const ComputedStyle* style = documentElement()->computedStyle()) {
if (style->direction() != rootDirection ||
style->getWritingMode() != rootWritingMode)
documentElement()->setNeedsStyleRecalc(
SubtreeStyleChange, StyleChangeReasonForTracing::create(
StyleChangeReason::WritingModeChange));
}
}
#if DCHECK_IS_ON()
static void assertLayoutTreeUpdated(Node& root) {
for (Node& node : NodeTraversal::inclusiveDescendantsOf(root)) {
// We leave some nodes with dirty bits in the tree because they don't
// matter like Comment and ProcessingInstruction nodes.
// TODO(esprehn): Don't even mark those nodes as needing recalcs in the
// first place.
if (!node.isElementNode() && !node.isTextNode() && !node.isShadowRoot() &&
!node.isDocumentNode())
continue;
DCHECK(!node.needsStyleRecalc());
DCHECK(!node.childNeedsStyleRecalc());
DCHECK(!node.needsReattachLayoutTree());
DCHECK(!node.childNeedsReattachLayoutTree());
DCHECK(!node.childNeedsDistributionRecalc());
DCHECK(!node.needsStyleInvalidation());
DCHECK(!node.childNeedsStyleInvalidation());
for (ShadowRoot* shadowRoot = node.youngestShadowRoot(); shadowRoot;
shadowRoot = shadowRoot->olderShadowRoot())
assertLayoutTreeUpdated(*shadowRoot);
}
}
#endif
void Document::updateStyleAndLayoutTree() {
DCHECK(isMainThread());
ScriptForbiddenScope forbidScript;
// We should forbid script execution for plugins here because update while
// layout is changing, HTMLPlugin element can be reattached and plugin can be
// destroyed. Plugin can execute scripts on destroy. It produces crash without
// PluginScriptForbiddenScope: crbug.com/550427.
PluginScriptForbiddenScope pluginForbidScript;
if (!view() || !isActive())
return;
if (view()->shouldThrottleRendering())
return;
if (!needsLayoutTreeUpdate()) {
if (lifecycle().state() < DocumentLifecycle::StyleClean) {
// needsLayoutTreeUpdate may change to false without any actual layout
// tree update. For example, needsAnimationTimingUpdate may change to
// false when time elapses. Advance lifecycle to StyleClean because style
// is actually clean now.
lifecycle().advanceTo(DocumentLifecycle::InStyleRecalc);
lifecycle().advanceTo(DocumentLifecycle::StyleClean);
}
return;
}
if (inStyleRecalc())
return;
// Entering here from inside layout, paint etc. would be catastrophic since
// recalcStyle can tear down the layout tree or (unfortunately) run
// script. Kill the whole layoutObject if someone managed to get into here in
// states not allowing tree mutations.
RELEASE_ASSERT(lifecycle().stateAllowsTreeMutations());
TRACE_EVENT_BEGIN1("blink,devtools.timeline", "UpdateLayoutTree", "beginData",
InspectorRecalculateStylesEvent::data(frame()));
unsigned startElementCount = styleEngine().styleForElementCount();
InspectorInstrumentation::willRecalculateStyle(this);
PerformanceMonitor::willRecalculateStyle(this);
DocumentAnimations::updateAnimationTimingIfNeeded(*this);
evaluateMediaQueryListIfNeeded();
updateUseShadowTreesIfNeeded();
updateDistribution();
updateActiveStyle();
updateStyleInvalidationIfNeeded();
// FIXME: We should update style on our ancestor chain before proceeding
// however doing so currently causes several tests to crash, as
// LocalFrame::setDocument calls Document::attach before setting the
// LocalDOMWindow on the LocalFrame, or the SecurityOrigin on the
// document. The attach, in turn resolves style (here) and then when we
// resolve style on the parent chain, we may end up re-attaching our
// containing iframe, which when asked HTMLFrameElementBase::isURLAllowed hits
// a null-dereference due to security code always assuming the document has a
// SecurityOrigin.
updateStyle();
notifyLayoutTreeOfSubtreeChanges();
// As a result of the style recalculation, the currently hovered element might
// have been detached (for example, by setting display:none in the :hover
// style), schedule another mouseMove event to check if any other elements
// ended up under the mouse pointer due to re-layout.
if (hoverNode() && !hoverNode()->layoutObject() && frame())
frame()->eventHandler().dispatchFakeMouseMoveEventSoon();
if (m_focusedElement && !m_focusedElement->isFocusable())
clearFocusedElementSoon();
layoutViewItem().clearHitTestCache();
DCHECK(!DocumentAnimations::needsAnimationTimingUpdate(*this));
unsigned elementCount =
styleEngine().styleForElementCount() - startElementCount;
TRACE_EVENT_END1("blink,devtools.timeline", "UpdateLayoutTree",
"elementCount", elementCount);
#if DCHECK_IS_ON()
assertLayoutTreeUpdated(*this);
#endif
InspectorInstrumentation::didRecalculateStyle(this);
PerformanceMonitor::didRecalculateStyle(this);
}
void Document::updateActiveStyle() {
DCHECK(isActive());
DCHECK(isMainThread());
TRACE_EVENT0("blink", "Document::updateActiveStyle");
styleEngine().updateActiveStyle();
}
void Document::updateStyle() {
DCHECK(!view()->shouldThrottleRendering());
TRACE_EVENT_BEGIN0("blink,blink_style", "Document::updateStyle");
double startTime = monotonicallyIncreasingTime();
unsigned initialElementCount = styleEngine().styleForElementCount();
HTMLFrameOwnerElement::UpdateSuspendScope suspendWidgetHierarchyUpdates;
m_lifecycle.advanceTo(DocumentLifecycle::InStyleRecalc);
StyleRecalcChange change = NoChange;
if (getStyleChangeType() >= SubtreeStyleChange)
change = Force;
NthIndexCache nthIndexCache(*this);
// FIXME: Cannot access the ensureStyleResolver() before calling
// styleForDocument below because apparently the StyleResolver's constructor
// has side effects. We should fix it. See printing/setPrinting.html,
// printing/width-overflow.html though they only fail on mac when accessing
// the resolver by what appears to be a viewport size difference.
if (change == Force) {
m_hasNodesWithPlaceholderStyle = false;
RefPtr<ComputedStyle> documentStyle =
StyleResolver::styleForDocument(*this);
StyleRecalcChange localChange = ComputedStyle::stylePropagationDiff(
documentStyle.get(), layoutViewItem().style());
if (localChange != NoChange)
layoutViewItem().setStyle(std::move(documentStyle));
}
clearNeedsStyleRecalc();
clearNeedsReattachLayoutTree();
StyleResolver& resolver = ensureStyleResolver();
bool shouldRecordStats;
TRACE_EVENT_CATEGORY_GROUP_ENABLED("blink,blink_style", &shouldRecordStats);
styleEngine().setStatsEnabled(shouldRecordStats);
if (Element* documentElement = this->documentElement()) {
inheritHtmlAndBodyElementStyles(change);
if (documentElement->shouldCallRecalcStyle(change))
documentElement->recalcStyle(change);
}
view()->recalcOverflowAfterStyleChange();
// Only retain the HashMap for the duration of StyleRecalc and
// LayoutTreeConstruction.
m_styleReattachDataMap.clear();
clearChildNeedsStyleRecalc();
clearChildNeedsReattachLayoutTree();
resolver.clearStyleSharingList();
DCHECK(!needsStyleRecalc());
DCHECK(!childNeedsStyleRecalc());
DCHECK(!needsReattachLayoutTree());
DCHECK(!childNeedsReattachLayoutTree());
DCHECK(inStyleRecalc());
DCHECK_EQ(styleResolver(), &resolver);
DCHECK(m_styleReattachDataMap.isEmpty());
m_lifecycle.advanceTo(DocumentLifecycle::StyleClean);
if (shouldRecordStats) {
TRACE_EVENT_END2("blink,blink_style", "Document::updateStyle",
"resolverAccessCount",
styleEngine().styleForElementCount() - initialElementCount,
"counters", styleEngine().stats()->toTracedValue());
} else {
TRACE_EVENT_END1(
"blink,blink_style", "Document::updateStyle", "resolverAccessCount",
styleEngine().styleForElementCount() - initialElementCount);
}
double updateDurationSeconds = monotonicallyIncreasingTime() - startTime;
DEFINE_STATIC_LOCAL(CustomCountHistogram, updateHistogram,
("Style.UpdateTime", 0, 10000000, 50));
updateHistogram.count(updateDurationSeconds * 1000 * 1000);
CSSTiming::from(*this).recordUpdateDuration(updateDurationSeconds);
}
void Document::notifyLayoutTreeOfSubtreeChanges() {
if (!layoutViewItem().wasNotifiedOfSubtreeChange())
return;
m_lifecycle.advanceTo(DocumentLifecycle::InLayoutSubtreeChange);
layoutViewItem().handleSubtreeModifications();
DCHECK(!layoutViewItem().wasNotifiedOfSubtreeChange());
m_lifecycle.advanceTo(DocumentLifecycle::LayoutSubtreeChangeClean);
}
bool Document::needsLayoutTreeUpdateForNode(const Node& node) const {
if (!node.canParticipateInFlatTree())
return false;
if (!needsLayoutTreeUpdate())
return false;
if (!node.isConnected())
return false;
if (needsFullLayoutTreeUpdate() || node.needsStyleRecalc() ||
node.needsStyleInvalidation())
return true;
for (const ContainerNode* ancestor = LayoutTreeBuilderTraversal::parent(node);
ancestor; ancestor = LayoutTreeBuilderTraversal::parent(*ancestor)) {
if (ancestor->needsStyleRecalc() || ancestor->needsStyleInvalidation() ||
ancestor->needsAdjacentStyleRecalc())
return true;
}
return false;
}
void Document::updateStyleAndLayoutTreeForNode(const Node* node) {
DCHECK(node);
if (!needsLayoutTreeUpdateForNode(*node))
return;
updateStyleAndLayoutTree();
}
void Document::updateStyleAndLayoutIgnorePendingStylesheetsForNode(Node* node) {
DCHECK(node);
if (!node->inActiveDocument())
return;
updateStyleAndLayoutIgnorePendingStylesheets();
}
void Document::updateStyleAndLayout() {
DCHECK(isMainThread());
ScriptForbiddenScope forbidScript;
FrameView* frameView = view();
if (frameView && frameView->isInPerformLayout()) {
// View layout should not be re-entrant.
NOTREACHED();
return;
}
if (HTMLFrameOwnerElement* owner = localOwner())
owner->document().updateStyleAndLayout();
updateStyleAndLayoutTree();
if (!isActive())
return;
if (frameView->needsLayout())
frameView->layout();
if (lifecycle().state() < DocumentLifecycle::LayoutClean)
lifecycle().advanceTo(DocumentLifecycle::LayoutClean);
if (FrameView* frameView = view())
frameView->performScrollAnchoringAdjustments();
}
void Document::layoutUpdated() {
// Plugins can run script inside layout which can detach the page.
// TODO(esprehn): Can this still happen now that all plugins are out of
// process?
if (frame() && frame()->page())
frame()->page()->chromeClient().layoutUpdated(frame());
markers().invalidateRectsForAllMarkers();
// The layout system may perform layouts with pending stylesheets. When
// recording first layout time, we ignore these layouts, since painting is
// suppressed for them. We're interested in tracking the time of the
// first real or 'paintable' layout.
// TODO(esprehn): This doesn't really make sense, why not track the first
// beginFrame? This will catch the first layout in a page that does lots
// of layout thrashing even though that layout might not be followed by
// a paint for many seconds.
if (isRenderingReady() && body() &&
!styleEngine().hasPendingScriptBlockingSheets()) {
if (!m_documentTiming.firstLayout())
m_documentTiming.markFirstLayout();
}
m_rootScrollerController->didUpdateLayout();
}
void Document::clearFocusedElementSoon() {
if (!m_clearFocusedElementTimer.isActive())
m_clearFocusedElementTimer.startOneShot(0, BLINK_FROM_HERE);
}
void Document::clearFocusedElementTimerFired(TimerBase*) {
updateStyleAndLayoutTree();
if (m_focusedElement && !m_focusedElement->isFocusable())
m_focusedElement->blur();
}
// FIXME: This is a bad idea and needs to be removed eventually.
// Other browsers load stylesheets before they continue parsing the web page.
// Since we don't, we can run JavaScript code that needs answers before the
// stylesheets are loaded. Doing a layout ignoring the pending stylesheets
// lets us get reasonable answers. The long term solution to this problem is
// to instead suspend JavaScript execution.
void Document::updateStyleAndLayoutTreeIgnorePendingStylesheets() {
StyleEngine::IgnoringPendingStylesheet ignoring(styleEngine());
if (styleEngine().hasPendingScriptBlockingSheets()) {
// FIXME: We are willing to attempt to suppress painting with outdated style
// info only once. Our assumption is that it would be dangerous to try to
// stop it a second time, after page content has already been loaded and
// displayed with accurate style information. (Our suppression involves
// blanking the whole page at the moment. If it were more refined, we might
// be able to do something better.) It's worth noting though that this
// entire method is a hack, since what we really want to do is suspend JS
// instead of doing a layout with inaccurate information.
HTMLElement* bodyElement = body();
if (bodyElement && !bodyElement->layoutObject() &&
m_pendingSheetLayout == NoLayoutWithPendingSheets) {
m_pendingSheetLayout = DidLayoutWithPendingSheets;
styleEngine().markAllTreeScopesDirty();
}
if (m_hasNodesWithPlaceholderStyle) {
// If new nodes have been added or style recalc has been done with style
// sheets still pending, some nodes may not have had their real style
// calculated yet. Normally this gets cleaned when style sheets arrive
// but here we need up-to-date style immediately.
setNeedsStyleRecalc(SubtreeStyleChange,
StyleChangeReasonForTracing::create(
StyleChangeReason::CleanupPlaceholderStyles));
}
}
updateStyleAndLayoutTree();
}
void Document::updateStyleAndLayoutIgnorePendingStylesheets(
Document::RunPostLayoutTasks runPostLayoutTasks) {
updateStyleAndLayoutTreeIgnorePendingStylesheets();
updateStyleAndLayout();
if (runPostLayoutTasks == RunPostLayoutTasksSynchronously && view())
view()->flushAnyPendingPostLayoutTasks();
}
PassRefPtr<ComputedStyle> Document::styleForElementIgnoringPendingStylesheets(
Element* element) {
DCHECK_EQ(element->document(), this);
StyleEngine::IgnoringPendingStylesheet ignoring(styleEngine());
if (!element->canParticipateInFlatTree())
return ensureStyleResolver().styleForElement(element, nullptr);
ContainerNode* parent = LayoutTreeBuilderTraversal::parent(*element);
return ensureStyleResolver().styleForElement(
element, parent ? parent->ensureComputedStyle() : nullptr);
}
PassRefPtr<ComputedStyle> Document::styleForPage(int pageIndex) {
updateDistribution();
return ensureStyleResolver().styleForPage(pageIndex);
}
bool Document::isPageBoxVisible(int pageIndex) {
return styleForPage(pageIndex)->visibility() !=
EVisibility::kHidden; // display property doesn't apply to @page.
}
void Document::pageSizeAndMarginsInPixels(int pageIndex,
DoubleSize& pageSize,
int& marginTop,
int& marginRight,
int& marginBottom,
int& marginLeft) {
RefPtr<ComputedStyle> style = styleForPage(pageIndex);
double width = pageSize.width();
double height = pageSize.height();
switch (style->getPageSizeType()) {
case PAGE_SIZE_AUTO:
break;
case PAGE_SIZE_AUTO_LANDSCAPE:
if (width < height)
std::swap(width, height);
break;
case PAGE_SIZE_AUTO_PORTRAIT:
if (width > height)
std::swap(width, height);
break;
case PAGE_SIZE_RESOLVED: {
FloatSize size = style->pageSize();
width = size.width();
height = size.height();
break;
}
default:
NOTREACHED();
}
pageSize = DoubleSize(width, height);
// The percentage is calculated with respect to the width even for margin top
// and bottom.
// http://www.w3.org/TR/CSS2/box.html#margin-properties
marginTop = style->marginTop().isAuto()
? marginTop
: intValueForLength(style->marginTop(), width);
marginRight = style->marginRight().isAuto()
? marginRight
: intValueForLength(style->marginRight(), width);
marginBottom = style->marginBottom().isAuto()
? marginBottom
: intValueForLength(style->marginBottom(), width);
marginLeft = style->marginLeft().isAuto()
? marginLeft
: intValueForLength(style->marginLeft(), width);
}
void Document::setIsViewSource(bool isViewSource) {
m_isViewSource = isViewSource;
if (!m_isViewSource)
return;
setSecurityOrigin(SecurityOrigin::createUnique());
didUpdateSecurityOrigin();
}
void Document::scheduleUseShadowTreeUpdate(SVGUseElement& element) {
m_useElementsNeedingUpdate.add(&element);
scheduleLayoutTreeUpdateIfNeeded();
}
void Document::unscheduleUseShadowTreeUpdate(SVGUseElement& element) {
m_useElementsNeedingUpdate.remove(&element);
}
void Document::updateUseShadowTreesIfNeeded() {
ScriptForbiddenScope forbidScript;
if (m_useElementsNeedingUpdate.isEmpty())
return;
HeapHashSet<Member<SVGUseElement>> elements;
m_useElementsNeedingUpdate.swap(elements);
for (SVGUseElement* element : elements)
element->buildPendingResource();
}
StyleResolver* Document::styleResolver() const {
return m_styleEngine->resolver();
}
StyleResolver& Document::ensureStyleResolver() const {
return m_styleEngine->ensureResolver();
}
void Document::initialize() {
DCHECK_EQ(m_lifecycle.state(), DocumentLifecycle::Inactive);
DCHECK(!m_axObjectCache || this != &axObjectCacheOwner());
m_layoutView = new LayoutView(this);
setLayoutObject(m_layoutView);
m_layoutView->setIsInWindow(true);
m_layoutView->setStyle(StyleResolver::styleForDocument(*this));
m_layoutView->compositor()->setNeedsCompositingUpdate(
CompositingUpdateAfterCompositingInputChange);
ContainerNode::attachLayoutTree();
// The TextAutosizer can't update layout view info while the Document is
// detached, so update now in case anything changed.
if (TextAutosizer* autosizer = textAutosizer())
autosizer->updatePageInfo();
m_frame->documentAttached();
m_lifecycle.advanceTo(DocumentLifecycle::StyleClean);
if (view())
view()->didAttachDocument();
}
void Document::shutdown() {
TRACE_EVENT0("blink", "Document::shutdown");
RELEASE_ASSERT(!m_frame || m_frame->tree().childCount() == 0);
if (!isActive())
return;
// Frame navigation can cause a new Document to be attached. Don't allow that,
// since that will cause a situation where LocalFrame still has a Document
// attached after this finishes! Normally, it shouldn't actually be possible
// to trigger navigation here. However, plugins (see below) can cause lots of
// crazy things to happen, since plugin detach involves nested message loops.
FrameNavigationDisabler navigationDisabler(*m_frame);
// Defer widget updates to avoid plugins trying to run script inside
// ScriptForbiddenScope, which will crash the renderer after
// https://crrev.com/200984
HTMLFrameOwnerElement::UpdateSuspendScope suspendWidgetHierarchyUpdates;
// Don't allow script to run in the middle of detachLayoutTree() because a
// detaching Document is not in a consistent state.
ScriptForbiddenScope forbidScript;
view()->dispose();
// If the widget of the document's frame owner doesn't match view() then
// FrameView::dispose() didn't clear the owner's widget. If we don't clear it
// here, it may be clobbered later in LocalFrame::createView(). See also
// https://crbug.com/673170 and the comment in FrameView::dispose().
HTMLFrameOwnerElement* ownerElement = m_frame->deprecatedLocalOwner();
if (ownerElement)
ownerElement->setWidget(nullptr);
m_markers->prepareForDestruction();
m_lifecycle.advanceTo(DocumentLifecycle::Stopping);
if (page())
page()->documentDetached(this);
InspectorInstrumentation::documentDetached(this);
if (m_frame->loader().client()->sharedWorkerRepositoryClient())
m_frame->loader()
.client()
->sharedWorkerRepositoryClient()
->documentDetached(this);
// FIXME: consider using SuspendableObject.
if (m_scriptedAnimationController)
m_scriptedAnimationController->clearDocumentPointer();
m_scriptedAnimationController.clear();
m_scriptedIdleTaskController.clear();
if (svgExtensions())
accessSVGExtensions().pauseAnimations();
// FIXME: This shouldn't be needed once LocalDOMWindow becomes
// ExecutionContext.
if (m_domWindow)
m_domWindow->clearEventQueue();
if (m_layoutView)
m_layoutView->setIsInWindow(false);
if (registrationContext())
registrationContext()->documentWasDetached();
m_hoverNode = nullptr;
m_activeHoverElement = nullptr;
m_autofocusElement = nullptr;
if (m_focusedElement.get()) {
Element* oldFocusedElement = m_focusedElement;
m_focusedElement = nullptr;
if (frameHost())
frameHost()->chromeClient().focusedNodeChanged(oldFocusedElement,
nullptr);
}
m_sequentialFocusNavigationStartingPoint = nullptr;
if (this == &axObjectCacheOwner())
clearAXObjectCache();
m_layoutView = nullptr;
ContainerNode::detachLayoutTree();
if (this != &axObjectCacheOwner()) {
if (AXObjectCache* cache = existingAXObjectCache()) {
// Documents that are not a root document use the AXObjectCache in
// their root document. Node::removedFrom is called after the
// document has been detached so it can't find the root document.
// We do the removals here instead.
for (Node& node : NodeTraversal::descendantsOf(*this)) {
cache->remove(&node);
}
}
}
styleEngine().didDetach();
frameHost()->eventHandlerRegistry().documentDetached(*this);
// Since |Document| class has multiple |LifecycleNotifier| as base class,
// we need to have |static_cast<SynchronousMutationNotifier>| here.
static_cast<SynchronousMutationNotifier*>(this)->notifyContextDestroyed();
m_frame->selection().documentDetached(*this);
// If this Document is associated with a live DocumentLoader, the
// DocumentLoader will take care of clearing the FetchContext. Deferring
// to the DocumentLoader when possible also prevents prematurely clearing
// the context in the case where multiple Documents end up associated with
// a single DocumentLoader (e.g., navigating to a javascript: url).
if (!loader())
m_fetcher->clearContext();
// If this document is the master for an HTMLImportsController, sever that
// relationship. This ensures that we don't leave import loads in flight,
// thinking they should have access to a valid frame when they don't.
if (m_importsController) {
m_importsController->dispose();
clearImportsController();
}
m_timers.setTimerTaskRunner(
Platform::current()->currentThread()->scheduler()->timerTaskRunner());
if (m_mediaQueryMatcher)
m_mediaQueryMatcher->documentDetached();
m_lifecycle.advanceTo(DocumentLifecycle::Stopped);
// TODO(haraken): Call contextDestroyed() before we start any disruptive
// operations.
// TODO(haraken): Currently we call notifyContextDestroyed() only in
// Document::detachLayoutTree(), which means that we don't call
// notifyContextDestroyed() for a document that doesn't get detached.
// If such a document has any observer, the observer won't get
// a contextDestroyed() notification. This can happen for a document
// created by DOMImplementation::createDocument().
ExecutionContext::notifyContextDestroyed();
// This is required, as our LocalFrame might delete itself as soon as it
// detaches us. However, this violates Node::detachLayoutTree() semantics, as
// it's never possible to re-attach. Eventually Document::detachLayoutTree()
// should be renamed, or this setting of the frame to 0 could be made
// explicit in each of the callers of Document::detachLayoutTree().
m_frame = nullptr;
}
void Document::removeAllEventListeners() {
ContainerNode::removeAllEventListeners();
if (LocalDOMWindow* domWindow = this->domWindow())
domWindow->removeAllEventListeners();
}
Document& Document::axObjectCacheOwner() const {
// Every document has its own axObjectCache if accessibility is enabled,
// except for page popups, which share the axObjectCache of their owner.
Document* doc = const_cast<Document*>(this);
if (doc->frame() && doc->frame()->pagePopupOwner()) {
DCHECK(!doc->m_axObjectCache);
return doc->frame()->pagePopupOwner()->document().axObjectCacheOwner();
}
return *doc;
}
void Document::clearAXObjectCache() {
DCHECK_EQ(&axObjectCacheOwner(), this);
// Clear the cache member variable before calling delete because attempts
// are made to access it during destruction.
if (m_axObjectCache)
m_axObjectCache->dispose();
m_axObjectCache.clear();
}
AXObjectCache* Document::existingAXObjectCache() const {
// If the layoutObject is gone then we are in the process of destruction.
// This method will be called before m_frame = nullptr.
if (!axObjectCacheOwner().layoutView())
return 0;
return axObjectCacheOwner().m_axObjectCache.get();
}
AXObjectCache* Document::axObjectCache() const {
Settings* settings = this->settings();
if (!settings || !settings->getAccessibilityEnabled())
return 0;
// The only document that actually has a AXObjectCache is the top-level
// document. This is because we need to be able to get from any
// WebCoreAXObject to any other WebCoreAXObject on the same page. Using a
// single cache allows lookups across nested webareas (i.e. multiple
// documents).
Document& cacheOwner = this->axObjectCacheOwner();
// If the document has already been detached, do not make a new axObjectCache.
if (!cacheOwner.layoutView())
return 0;
DCHECK(&cacheOwner == this || !m_axObjectCache);
if (!cacheOwner.m_axObjectCache)
cacheOwner.m_axObjectCache = AXObjectCache::create(cacheOwner);
return cacheOwner.m_axObjectCache.get();
}
CanvasFontCache* Document::canvasFontCache() {
if (!m_canvasFontCache)
m_canvasFontCache = CanvasFontCache::create(*this);
return m_canvasFontCache.get();
}
DocumentParser* Document::createParser() {
if (isHTMLDocument())
return HTMLDocumentParser::create(toHTMLDocument(*this),
m_parserSyncPolicy);
// FIXME: this should probably pass the frame instead
return XMLDocumentParser::create(*this, view());
}
bool Document::isFrameSet() const {
if (!isHTMLDocument())
return false;
return isHTMLFrameSetElement(body());
}
ScriptableDocumentParser* Document::scriptableDocumentParser() const {
return parser() ? parser()->asScriptableDocumentParser() : nullptr;
}
void Document::open(Document* enteredDocument, ExceptionState& exceptionState) {
if (importLoader()) {
exceptionState.throwDOMException(
InvalidStateError, "Imported document doesn't support open().");
return;
}
if (!isHTMLDocument()) {
exceptionState.throwDOMException(InvalidStateError,
"Only HTML documents support open().");
return;
}
if (m_throwOnDynamicMarkupInsertionCount) {
exceptionState.throwDOMException(
InvalidStateError, "Custom Element constructor should not use open().");
return;
}
if (enteredDocument) {
if (!getSecurityOrigin()->canAccess(enteredDocument->getSecurityOrigin())) {
exceptionState.throwSecurityError(
"Can only call open() on same-origin documents.");
return;
}
setSecurityOrigin(enteredDocument->getSecurityOrigin());
setURL(enteredDocument->url());
m_cookieURL = enteredDocument->cookieURL();
}
open();
}
void Document::open() {
DCHECK(!importLoader());
if (m_frame) {
if (ScriptableDocumentParser* parser = scriptableDocumentParser()) {
if (parser->isParsing()) {
// FIXME: HTML5 doesn't tell us to check this, it might not be correct.
if (parser->isExecutingScript())
return;
if (!parser->wasCreatedByScript() && parser->hasInsertionPoint())
return;
}
}
// PlzNavigate: We should abort ongoing navigations handled by the client.
if (m_frame->loader().hasProvisionalNavigation())
m_frame->loader().stopAllLoaders();
}
removeAllEventListenersRecursively();
implicitOpen(ForceSynchronousParsing);
if (ScriptableDocumentParser* parser = scriptableDocumentParser())
parser->setWasCreatedByScript(true);
if (m_frame)
m_frame->loader().didExplicitOpen();
if (m_loadEventProgress != LoadEventInProgress &&
pageDismissalEventBeingDispatched() == NoDismissal)
m_loadEventProgress = LoadEventNotRun;
}
void Document::detachParser() {
if (!m_parser)
return;
m_parser->detach();
m_parser.clear();
DocumentParserTiming::from(*this).markParserDetached();
}
void Document::cancelParsing() {
detachParser();
setParsingState(FinishedParsing);
setReadyState(Complete);
}
DocumentParser* Document::implicitOpen(
ParserSynchronizationPolicy parserSyncPolicy) {
detachParser();
removeChildren();
DCHECK(!m_focusedElement);
setCompatibilityMode(NoQuirksMode);
if (!threadedParsingEnabledForTesting()) {
parserSyncPolicy = ForceSynchronousParsing;
} else if (parserSyncPolicy == AllowAsynchronousParsing && isPrefetchOnly()) {
// Prefetch must be synchronous.
parserSyncPolicy = ForceSynchronousParsing;
}
m_parserSyncPolicy = parserSyncPolicy;
m_parser = createParser();
DocumentParserTiming::from(*this).markParserStart();
setParsingState(Parsing);
setReadyState(Loading);
return m_parser;
}
HTMLElement* Document::body() const {
if (!documentElement() || !isHTMLHtmlElement(documentElement()))
return 0;
for (HTMLElement* child =
Traversal<HTMLElement>::firstChild(*documentElement());
child; child = Traversal<HTMLElement>::nextSibling(*child)) {
if (isHTMLFrameSetElement(*child) || isHTMLBodyElement(*child))
return child;
}
return 0;
}
HTMLBodyElement* Document::firstBodyElement() const {
if (!documentElement())
return 0;
for (HTMLElement* child =
Traversal<HTMLElement>::firstChild(*documentElement());
child; child = Traversal<HTMLElement>::nextSibling(*child)) {
if (isHTMLBodyElement(*child))
return toHTMLBodyElement(child);
}
return 0;
}
void Document::setBody(HTMLElement* prpNewBody,
ExceptionState& exceptionState) {
HTMLElement* newBody = prpNewBody;
if (!newBody) {
exceptionState.throwDOMException(
HierarchyRequestError,
ExceptionMessages::argumentNullOrIncorrectType(1, "HTMLElement"));
return;
}
if (!documentElement()) {
exceptionState.throwDOMException(HierarchyRequestError,
"No document element exists.");
return;
}
if (!isHTMLBodyElement(*newBody) && !isHTMLFrameSetElement(*newBody)) {
exceptionState.throwDOMException(
HierarchyRequestError,
"The new body element is of type '" + newBody->tagName() +
"'. It must be either a 'BODY' or 'FRAMESET' element.");
return;
}
HTMLElement* oldBody = body();
if (oldBody == newBody)
return;
if (oldBody)
documentElement()->replaceChild(newBody, oldBody, exceptionState);
else
documentElement()->appendChild(newBody, exceptionState);
}
void Document::willInsertBody() {
if (frame())
frame()->loader().client()->dispatchWillInsertBody();
// If we get to the <body> try to resume commits since we should have content
// to paint now.
// TODO(esprehn): Is this really optimal? We might start producing frames
// for very little content, should we wait for some heuristic like
// isVisuallyNonEmpty() ?
beginLifecycleUpdatesIfRenderingReady();
}
HTMLHeadElement* Document::head() const {
Node* de = documentElement();
if (!de)
return 0;
return Traversal<HTMLHeadElement>::firstChild(*de);
}
Element* Document::viewportDefiningElement(
const ComputedStyle* rootStyle) const {
// If a BODY element sets non-visible overflow, it is to be propagated to the
// viewport, as long as the following conditions are all met:
// (1) The root element is HTML.
// (2) It is the primary BODY element (we only assert for this, expecting
// callers to behave).
// (3) The root element has visible overflow.
// Otherwise it's the root element's properties that are to be propagated.
Element* rootElement = documentElement();
Element* bodyElement = body();
if (!rootElement)
return 0;
if (!rootStyle) {
rootStyle = rootElement->computedStyle();
if (!rootStyle)
return 0;
}
if (bodyElement && rootStyle->isOverflowVisible() &&
isHTMLHtmlElement(*rootElement))
return bodyElement;
return rootElement;
}
void Document::close(ExceptionState& exceptionState) {
// FIXME: We should follow the specification more closely:
// http://www.whatwg.org/specs/web-apps/current-work/#dom-document-close
if (importLoader()) {
exceptionState.throwDOMException(
InvalidStateError, "Imported document doesn't support close().");
return;
}
if (!isHTMLDocument()) {
exceptionState.throwDOMException(InvalidStateError,
"Only HTML documents support close().");
return;
}
if (m_throwOnDynamicMarkupInsertionCount) {
exceptionState.throwDOMException(
InvalidStateError,
"Custom Element constructor should not use close().");
return;
}
close();
}
void Document::close() {
if (!scriptableDocumentParser() ||
!scriptableDocumentParser()->wasCreatedByScript() ||
!scriptableDocumentParser()->isParsing())
return;
if (DocumentParser* parser = m_parser)
parser->finish();
if (!m_frame) {
// Because we have no frame, we don't know if all loading has completed,
// so we just call implicitClose() immediately. FIXME: This might fire
// the load event prematurely
// <http://bugs.webkit.org/show_bug.cgi?id=14568>.
implicitClose();
return;
}
m_frame->loader().checkCompleted();
}
void Document::implicitClose() {
DCHECK(!inStyleRecalc());
if (processingLoadEvent() || !m_parser)
return;
if (frame() && frame()->navigationScheduler().locationChangePending()) {
suppressLoadEvent();
return;
}
m_loadEventProgress = LoadEventInProgress;
ScriptableDocumentParser* parser = scriptableDocumentParser();
m_wellFormed = parser && parser->wellFormed();
// We have to clear the parser, in case someone document.write()s from the
// onLoad event handler, as in Radar 3206524.
detachParser();
if (frame() && frame()->script().canExecuteScripts(NotAboutToExecuteScript)) {
ImageLoader::dispatchPendingLoadEvents();
ImageLoader::dispatchPendingErrorEvents();
}
// JS running below could remove the frame or destroy the LayoutView so we
// call those two functions repeatedly and don't save them on the stack.
// To align the HTML load event and the SVGLoad event for the outermost <svg>
// element, fire it from here, instead of doing it from
// SVGElement::finishedParsingChildren.
if (svgExtensions())
accessSVGExtensions().dispatchSVGLoadEventToOutermostSVGElements();
if (this->domWindow())
this->domWindow()->documentWasClosed();
if (frame()) {
frame()->loader().client()->dispatchDidHandleOnloadEvents();
loader()->applicationCacheHost()->stopDeferringEvents();
}
if (!frame()) {
m_loadEventProgress = LoadEventCompleted;
return;
}
// Make sure both the initial layout and reflow happen after the onload
// fires. This will improve onload scores, and other browsers do it.
// If they wanna cheat, we can too. -dwh
if (frame()->navigationScheduler().locationChangePending() &&
elapsedTime() < cLayoutScheduleThreshold) {
// Just bail out. Before or during the onload we were shifted to another
// page. The old i-Bench suite does this. When this happens don't bother
// painting or laying out.
m_loadEventProgress = LoadEventCompleted;
return;
}
// We used to force a synchronous display and flush here. This really isn't
// necessary and can in fact be actively harmful if pages are loading at a
// rate of > 60fps
// (if your platform is syncing flushes and limiting them to 60fps).
if (!localOwner() || (localOwner()->layoutObject() &&
!localOwner()->layoutObject()->needsLayout())) {
updateStyleAndLayoutTree();
// Always do a layout after loading if needed.
if (view() && !layoutViewItem().isNull() &&
(!layoutViewItem().firstChild() || layoutViewItem().needsLayout()))
view()->layout();
}
m_loadEventProgress = LoadEventCompleted;
if (frame() && !layoutViewItem().isNull() &&
settings()->getAccessibilityEnabled()) {
if (AXObjectCache* cache = axObjectCache()) {
if (this == &axObjectCacheOwner())
cache->handleLoadComplete(this);
else
cache->handleLayoutComplete(this);
}
}
if (svgExtensions())
accessSVGExtensions().startAnimations();
}
bool Document::dispatchBeforeUnloadEvent(ChromeClient& chromeClient,
bool isReload,
bool& didAllowNavigation) {
if (!m_domWindow)
return true;
if (!body())
return true;
if (processingBeforeUnload())
return false;
BeforeUnloadEvent* beforeUnloadEvent = BeforeUnloadEvent::create();
m_loadEventProgress = BeforeUnloadEventInProgress;
m_domWindow->dispatchEvent(beforeUnloadEvent, this);
m_loadEventProgress = BeforeUnloadEventCompleted;
if (!beforeUnloadEvent->defaultPrevented())
defaultEventHandler(beforeUnloadEvent);
if (!frame() || beforeUnloadEvent->returnValue().isNull())
return true;
if (didAllowNavigation) {
addConsoleMessage(ConsoleMessage::create(
JSMessageSource, ErrorMessageLevel,
"Blocked attempt to show multiple 'beforeunload' confirmation panels "
"for a single navigation."));
return true;
}
String text = beforeUnloadEvent->returnValue();
if (chromeClient.openBeforeUnloadConfirmPanel(text, m_frame, isReload)) {
didAllowNavigation = true;
return true;
}
return false;
}
void Document::dispatchUnloadEvents() {
PluginScriptForbiddenScope forbidPluginDestructorScripting;
if (m_parser)
m_parser->stopParsing();
if (m_loadEventProgress == LoadEventNotRun)
return;
if (m_loadEventProgress <= UnloadEventInProgress) {
Element* currentFocusedElement = focusedElement();
if (isHTMLInputElement(currentFocusedElement))
toHTMLInputElement(*currentFocusedElement).endEditing();
if (m_loadEventProgress < PageHideInProgress) {
m_loadEventProgress = PageHideInProgress;
if (LocalDOMWindow* window = domWindow())
window->dispatchEvent(
PageTransitionEvent::create(EventTypeNames::pagehide, false), this);
if (!m_frame)
return;
PageVisibilityState visibilityState = pageVisibilityState();
m_loadEventProgress = UnloadVisibilityChangeInProgress;
if (visibilityState != PageVisibilityStateHidden &&
RuntimeEnabledFeatures::visibilityChangeOnUnloadEnabled()) {
// Dispatch visibilitychange event, but don't bother doing
// other notifications as we're about to be unloaded.
dispatchEvent(Event::createBubble(EventTypeNames::visibilitychange));
dispatchEvent(
Event::createBubble(EventTypeNames::webkitvisibilitychange));
}
if (!m_frame)
return;
DocumentLoader* documentLoader =
m_frame->loader().provisionalDocumentLoader();
m_loadEventProgress = UnloadEventInProgress;
Event* unloadEvent(Event::create(EventTypeNames::unload));
if (documentLoader && !documentLoader->timing().unloadEventStart() &&
!documentLoader->timing().unloadEventEnd()) {
DocumentLoadTiming& timing = documentLoader->timing();
DCHECK(timing.navigationStart());
timing.markUnloadEventStart();
m_frame->domWindow()->dispatchEvent(unloadEvent, this);
timing.markUnloadEventEnd();
} else {
m_frame->domWindow()->dispatchEvent(unloadEvent, m_frame->document());
}
}
m_loadEventProgress = UnloadEventHandled;
}
if (!m_frame)
return;
// Don't remove event listeners from a transitional empty document (see
// https://bugs.webkit.org/show_bug.cgi?id=28716 for more information).
bool keepEventListeners =
m_frame->loader().provisionalDocumentLoader() &&
m_frame->shouldReuseDefaultView(
m_frame->loader().provisionalDocumentLoader()->url());
if (!keepEventListeners)
removeAllEventListenersRecursively();
}
Document::PageDismissalType Document::pageDismissalEventBeingDispatched()
const {
switch (m_loadEventProgress) {
case BeforeUnloadEventInProgress:
return BeforeUnloadDismissal;
case PageHideInProgress:
return PageHideDismissal;
case UnloadVisibilityChangeInProgress:
return UnloadVisibilityChangeDismissal;
case UnloadEventInProgress:
return UnloadDismissal;
case LoadEventNotRun:
case LoadEventInProgress:
case LoadEventCompleted:
case BeforeUnloadEventCompleted:
case UnloadEventHandled:
return NoDismissal;
}
NOTREACHED();
return NoDismissal;
}
void Document::setParsingState(ParsingState parsingState) {
m_parsingState = parsingState;
if (parsing() && !m_elementDataCache)
m_elementDataCache = ElementDataCache::create();
}
bool Document::shouldScheduleLayout() const {
// This function will only be called when FrameView thinks a layout is needed.
// This enforces a couple extra rules.
//
// (a) Only schedule a layout once the stylesheets are loaded.
// (b) Only schedule layout once we have a body element.
if (!isActive())
return false;
if (isRenderingReady() && body())
return true;
if (documentElement() && !isHTMLHtmlElement(*documentElement()))
return true;
return false;
}
int Document::elapsedTime() const {
return static_cast<int>((currentTime() - m_startTime) * 1000);
}
void Document::write(const SegmentedString& text,
Document* enteredDocument,
ExceptionState& exceptionState) {
if (importLoader()) {
exceptionState.throwDOMException(
InvalidStateError, "Imported document doesn't support write().");
return;
}
if (!isHTMLDocument()) {
exceptionState.throwDOMException(InvalidStateError,
"Only HTML documents support write().");
return;
}
if (m_throwOnDynamicMarkupInsertionCount) {
exceptionState.throwDOMException(
InvalidStateError,
"Custom Element constructor should not use write().");
return;
}
if (enteredDocument &&
!getSecurityOrigin()->canAccess(enteredDocument->getSecurityOrigin())) {
exceptionState.throwSecurityError(
"Can only call write() on same-origin documents.");
return;
}
NestingLevelIncrementer nestingLevelIncrementer(m_writeRecursionDepth);
m_writeRecursionIsTooDeep =
(m_writeRecursionDepth > 1) && m_writeRecursionIsTooDeep;
m_writeRecursionIsTooDeep =
(m_writeRecursionDepth > cMaxWriteRecursionDepth) ||
m_writeRecursionIsTooDeep;
if (m_writeRecursionIsTooDeep)
return;
bool hasInsertionPoint = m_parser && m_parser->hasInsertionPoint();
if (!hasInsertionPoint && m_ignoreDestructiveWriteCount) {
addConsoleMessage(
ConsoleMessage::create(JSMessageSource, WarningMessageLevel,
ExceptionMessages::failedToExecute(
"write", "Document",
"It isn't possible to write into a document "
"from an asynchronously-loaded external "
"script unless it is explicitly opened.")));
return;
}
if (!hasInsertionPoint)
open(enteredDocument, ASSERT_NO_EXCEPTION);
DCHECK(m_parser);
InspectorInstrumentation::NativeBreakpoint nativeBreakpoint(
this, "document.write", true);
m_parser->insert(text);
}
void Document::write(const String& text,
Document* enteredDocument,
ExceptionState& exceptionState) {
write(SegmentedString(text), enteredDocument, exceptionState);
}
void Document::writeln(const String& text,
Document* enteredDocument,
ExceptionState& exceptionState) {
write(text, enteredDocument, exceptionState);
if (exceptionState.hadException())
return;
write("\n", enteredDocument);
}
void Document::write(LocalDOMWindow* callingWindow,
const Vector<String>& text,
ExceptionState& exceptionState) {
DCHECK(callingWindow);
StringBuilder builder;
for (const String& string : text)
builder.append(string);
write(builder.toString(), callingWindow->document(), exceptionState);
}
void Document::writeln(LocalDOMWindow* callingWindow,
const Vector<String>& text,
ExceptionState& exceptionState) {
DCHECK(callingWindow);
StringBuilder builder;
for (const String& string : text)
builder.append(string);
writeln(builder.toString(), callingWindow->document(), exceptionState);
}
const KURL& Document::virtualURL() const {
return m_url;
}
KURL Document::virtualCompleteURL(const String& url) const {
return completeURL(url);
}
DOMTimerCoordinator* Document::timers() {
return &m_timers;
}
EventTarget* Document::errorEventTarget() {
return domWindow();
}
void Document::exceptionThrown(ErrorEvent* event) {
MainThreadDebugger::instance()->exceptionThrown(this, event);
}
void Document::setURL(const KURL& url) {
const KURL& newURL = url.isEmpty() ? blankURL() : url;
if (newURL == m_url)
return;
m_url = newURL;
m_accessEntryFromURL = nullptr;
updateBaseURL();
contextFeatures().urlDidChange(this);
}
KURL Document::validBaseElementURL() const {
if (m_baseElementURL.isValid())
return m_baseElementURL;
return KURL();
}
void Document::updateBaseURL() {
KURL oldBaseURL = m_baseURL;
// DOM 3 Core: When the Document supports the feature "HTML" [DOM Level 2
// HTML], the base URI is computed using first the value of the href attribute
// of the HTML BASE element if any, and the value of the documentURI attribute
// from the Document interface otherwise (which we store, preparsed, in
// m_url).
if (!m_baseElementURL.isEmpty())
m_baseURL = m_baseElementURL;
else if (!m_baseURLOverride.isEmpty())
m_baseURL = m_baseURLOverride;
else
m_baseURL = m_url;
selectorQueryCache().invalidate();
if (!m_baseURL.isValid())
m_baseURL = KURL();
if (m_elemSheet) {
// Element sheet is silly. It never contains anything.
DCHECK(!m_elemSheet->contents()->ruleCount());
m_elemSheet = CSSStyleSheet::createInline(*this, m_baseURL);
}
if (!equalIgnoringFragmentIdentifier(oldBaseURL, m_baseURL)) {
// Base URL change changes any relative visited links.
// FIXME: There are other URLs in the tree that would need to be
// re-evaluated on dynamic base URL change. Style should be invalidated too.
for (HTMLAnchorElement& anchor :
Traversal<HTMLAnchorElement>::startsAfter(*this))
anchor.invalidateCachedVisitedLinkHash();
}
}
void Document::setBaseURLOverride(const KURL& url) {
m_baseURLOverride = url;
updateBaseURL();
}
void Document::processBaseElement() {
UseCounter::count(*this, UseCounter::BaseElement);
// Find the first href attribute in a base element and the first target
// attribute in a base element.
const AtomicString* href = 0;
const AtomicString* target = 0;
for (HTMLBaseElement* base = Traversal<HTMLBaseElement>::firstWithin(*this);
base && (!href || !target);
base = Traversal<HTMLBaseElement>::next(*base)) {
if (!href) {
const AtomicString& value = base->fastGetAttribute(hrefAttr);
if (!value.isNull())
href = &value;
}
if (!target) {
const AtomicString& value = base->fastGetAttribute(targetAttr);
if (!value.isNull())
target = &value;
}
if (contentSecurityPolicy()->isActive()) {
UseCounter::count(*this,
UseCounter::ContentSecurityPolicyWithBaseElement);
}
}
// FIXME: Since this doesn't share code with completeURL it may not handle
// encodings correctly.
KURL baseElementURL;
if (href) {
String strippedHref = stripLeadingAndTrailingHTMLSpaces(*href);
if (!strippedHref.isEmpty())
baseElementURL = KURL(url(), strippedHref);
}
if (!baseElementURL.isEmpty()) {
if (baseElementURL.protocolIsData())
UseCounter::count(*this, UseCounter::BaseWithDataHref);
if (!this->getSecurityOrigin()->canRequest(baseElementURL))
UseCounter::count(*this, UseCounter::BaseWithCrossOriginHref);
}
if (m_baseElementURL != baseElementURL &&
contentSecurityPolicy()->allowBaseURI(baseElementURL)) {
m_baseElementURL = baseElementURL;
updateBaseURL();
}
if (target) {
if (target->contains('\n') || target->contains('\r'))
UseCounter::count(*this, UseCounter::BaseWithNewlinesInTarget);
if (target->contains('<'))
UseCounter::count(*this, UseCounter::BaseWithOpenBracketInTarget);
m_baseTarget = *target;
} else {
m_baseTarget = nullAtom;
}
}
String Document::userAgent() const {
return frame() ? frame()->loader().userAgent() : String();
}
void Document::disableEval(const String& errorMessage) {
if (!frame())
return;
frame()->script().disableEval(errorMessage);
}
void Document::didLoadAllImports() {
if (!haveScriptBlockingStylesheetsLoaded())
return;
if (!importLoader())
styleResolverMayHaveChanged();
didLoadAllScriptBlockingResources();
}
void Document::didRemoveAllPendingStylesheet() {
styleResolverMayHaveChanged();
// Only imports on master documents can trigger rendering.
if (HTMLImportLoader* import = importLoader())
import->didRemoveAllPendingStylesheet();
if (!haveImportsLoaded())
return;
didLoadAllScriptBlockingResources();
}
void Document::didLoadAllScriptBlockingResources() {
// Use wrapWeakPersistent because the task should not keep this Document alive
// just for executing scripts.
m_executeScriptsWaitingForResourcesTaskHandle =
TaskRunnerHelper::get(TaskType::Networking, this)
->postCancellableTask(
BLINK_FROM_HERE,
WTF::bind(&Document::executeScriptsWaitingForResources,
wrapWeakPersistent(this)));
if (isHTMLDocument() && body()) {
// For HTML if we have no more stylesheets to load and we're past the body
// tag, we should have something to paint so resume.
beginLifecycleUpdatesIfRenderingReady();
} else if (!isHTMLDocument() && documentElement()) {
// For non-HTML there is no body so resume as soon as the sheets are loaded.
beginLifecycleUpdatesIfRenderingReady();
}
if (m_gotoAnchorNeededAfterStylesheetsLoad && view())
view()->processUrlFragment(m_url);
}
void Document::executeScriptsWaitingForResources() {
if (!isScriptExecutionReady())
return;
if (ScriptableDocumentParser* parser = scriptableDocumentParser())
parser->executeScriptsWaitingForResources();
}
CSSStyleSheet& Document::elementSheet() {
if (!m_elemSheet)
m_elemSheet = CSSStyleSheet::createInline(*this, m_baseURL);
return *m_elemSheet;
}
void Document::maybeHandleHttpRefresh(const String& content,
HttpRefreshType httpRefreshType) {
if (m_isViewSource || !m_frame)
return;
double delay;
String refreshURL;
if (!parseHTTPRefresh(content, httpRefreshType == HttpRefreshFromMetaTag
? isHTMLSpace<UChar>
: nullptr,
delay, refreshURL))
return;
if (refreshURL.isEmpty())
refreshURL = url().getString();
else
refreshURL = completeURL(refreshURL).getString();
if (protocolIsJavaScript(refreshURL)) {
String message =
"Refused to refresh " + m_url.elidedString() + " to a javascript: URL";
addConsoleMessage(ConsoleMessage::create(SecurityMessageSource,
ErrorMessageLevel, message));
return;
}
if (httpRefreshType == HttpRefreshFromMetaTag &&
isSandboxed(SandboxAutomaticFeatures)) {
String message =
"Refused to execute the redirect specified via '<meta "
"http-equiv='refresh' content='...'>'. The document is sandboxed, and "
"the 'allow-scripts' keyword is not set.";
addConsoleMessage(ConsoleMessage::create(SecurityMessageSource,
ErrorMessageLevel, message));
return;
}
m_frame->navigationScheduler().scheduleRedirect(delay, refreshURL);
}
bool Document::shouldMergeWithLegacyDescription(
ViewportDescription::Type origin) const {
return settings() && settings()->getViewportMetaMergeContentQuirk() &&
m_legacyViewportDescription.isMetaViewportType() &&
m_legacyViewportDescription.type == origin;
}
void Document::setViewportDescription(
const ViewportDescription& viewportDescription) {
if (viewportDescription.isLegacyViewportType()) {
if (viewportDescription == m_legacyViewportDescription)
return;
m_legacyViewportDescription = viewportDescription;
} else {
if (viewportDescription == m_viewportDescription)
return;
m_viewportDescription = viewportDescription;
// The UA-defined min-width is considered specifically by Android WebView
// quirks mode.
if (!viewportDescription.isSpecifiedByAuthor())
m_viewportDefaultMinWidth = viewportDescription.minWidth;
}
updateViewportDescription();
}
ViewportDescription Document::viewportDescription() const {
ViewportDescription appliedViewportDescription = m_viewportDescription;
bool viewportMetaEnabled = settings() && settings()->getViewportMetaEnabled();
if (m_legacyViewportDescription.type !=
ViewportDescription::UserAgentStyleSheet &&
viewportMetaEnabled)
appliedViewportDescription = m_legacyViewportDescription;
if (shouldOverrideLegacyDescription(m_viewportDescription.type))
appliedViewportDescription = m_viewportDescription;
return appliedViewportDescription;
}
void Document::updateViewportDescription() {
if (frame() && frame()->isMainFrame()) {
frameHost()->chromeClient().dispatchViewportPropertiesDidChange(
viewportDescription());
}
}
String Document::outgoingReferrer() const {
if (getSecurityOrigin()->isUnique()) {
// Return |no-referrer|.
return String();
}
// See http://www.whatwg.org/specs/web-apps/current-work/#fetching-resources
// for why we walk the parent chain for srcdoc documents.
const Document* referrerDocument = this;
if (LocalFrame* frame = m_frame) {
while (frame->document()->isSrcdocDocument()) {
// Srcdoc documents must be local within the containing frame.
frame = toLocalFrame(frame->tree().parent());
// Srcdoc documents cannot be top-level documents, by definition,
// because they need to be contained in iframes with the srcdoc.
DCHECK(frame);
}
referrerDocument = frame->document();
}
return referrerDocument->m_url.strippedForUseAsReferrer();
}
ReferrerPolicy Document::getReferrerPolicy() const {
ReferrerPolicy policy = ExecutionContext::getReferrerPolicy();
// For srcdoc documents without their own policy, walk up the frame
// tree to find the document that is either not a srcdoc or doesn't
// have its own policy. This algorithm is defined in
// https://html.spec.whatwg.org/multipage/browsers.html#set-up-a-browsing-context-environment-settings-object.
if (!m_frame || policy != ReferrerPolicyDefault || !isSrcdocDocument()) {
return policy;
}
LocalFrame* frame = toLocalFrame(m_frame->tree().parent());
DCHECK(frame);
return frame->document()->getReferrerPolicy();
}
MouseEventWithHitTestResults Document::performMouseEventHitTest(
const HitTestRequest& request,
const LayoutPoint& documentPoint,
const PlatformMouseEvent& event) {
DCHECK(layoutViewItem().isNull() || layoutViewItem().isLayoutView());
// LayoutView::hitTest causes a layout, and we don't want to hit that until
// the first layout because until then, there is nothing shown on the screen -
// the user can't have intentionally clicked on something belonging to this
// page. Furthermore, mousemove events before the first layout should not
// lead to a premature layout() happening, which could show a flash of white.
// See also the similar code in EventHandler::hitTestResultAtPoint.
if (layoutViewItem().isNull() || !view() || !view()->didFirstLayout())
return MouseEventWithHitTestResults(event,
HitTestResult(request, LayoutPoint()));
HitTestResult result(request, documentPoint);
layoutViewItem().hitTest(result);
if (!request.readOnly())
updateHoverActiveState(request, result.innerElement(), result.scrollbar());
if (isHTMLCanvasElement(result.innerNode())) {
PlatformMouseEvent eventWithRegion = event;
HitTestCanvasResult* hitTestCanvasResult =
toHTMLCanvasElement(result.innerNode())
->getControlAndIdIfHitRegionExists(result.pointInInnerNodeFrame());
if (hitTestCanvasResult->getControl()) {
result.setInnerNode(hitTestCanvasResult->getControl());
}
eventWithRegion.setRegion(hitTestCanvasResult->getId());
return MouseEventWithHitTestResults(eventWithRegion, result);
}
return MouseEventWithHitTestResults(event, result);
}
// DOM Section 1.1.1
bool Document::childTypeAllowed(NodeType type) const {
switch (type) {
case kAttributeNode:
case kCdataSectionNode:
case kDocumentFragmentNode:
case kDocumentNode:
case kTextNode:
return false;
case kCommentNode:
case kProcessingInstructionNode:
return true;
case kDocumentTypeNode:
case kElementNode:
// Documents may contain no more than one of each of these.
// (One Element and one DocumentType.)
for (Node& c : NodeTraversal::childrenOf(*this)) {
if (c.getNodeType() == type)
return false;
}
return true;
}
return false;
}
bool Document::canAcceptChild(const Node& newChild,
const Node* oldChild,
ExceptionState& exceptionState) const {
if (oldChild && oldChild->getNodeType() == newChild.getNodeType())
return true;
int numDoctypes = 0;
int numElements = 0;
// First, check how many doctypes and elements we have, not counting
// the child we're about to remove.
for (Node& child : NodeTraversal::childrenOf(*this)) {
if (oldChild && *oldChild == child)
continue;
switch (child.getNodeType()) {
case kDocumentTypeNode:
numDoctypes++;
break;
case kElementNode:
numElements++;
break;
default:
break;
}
}
// Then, see how many doctypes and elements might be added by the new child.
if (newChild.isDocumentFragment()) {
for (Node& child :
NodeTraversal::childrenOf(toDocumentFragment(newChild))) {
switch (child.getNodeType()) {
case kAttributeNode:
case kCdataSectionNode:
case kDocumentFragmentNode:
case kDocumentNode:
case kTextNode:
exceptionState.throwDOMException(
HierarchyRequestError,
"Nodes of type '" + newChild.nodeName() +
"' may not be inserted inside nodes of type '#document'.");
return false;
case kCommentNode:
case kProcessingInstructionNode:
break;
case kDocumentTypeNode:
numDoctypes++;
break;
case kElementNode:
numElements++;
break;
}
}
} else {
switch (newChild.getNodeType()) {
case kAttributeNode:
case kCdataSectionNode:
case kDocumentFragmentNode:
case kDocumentNode:
case kTextNode:
exceptionState.throwDOMException(
HierarchyRequestError,
"Nodes of type '" + newChild.nodeName() +
"' may not be inserted inside nodes of type '#document'.");
return false;
case kCommentNode:
case kProcessingInstructionNode:
return true;
case kDocumentTypeNode:
numDoctypes++;
break;
case kElementNode:
numElements++;
break;
}
}
if (numElements > 1 || numDoctypes > 1) {
exceptionState.throwDOMException(
HierarchyRequestError,
String::format("Only one %s on document allowed.",
numElements > 1 ? "element" : "doctype"));
return false;
}
return true;
}
Node* Document::cloneNode(bool deep) {
Document* clone = cloneDocumentWithoutChildren();
clone->cloneDataFromDocument(*this);
if (deep)
cloneChildNodes(clone);
return clone;
}
Document* Document::cloneDocumentWithoutChildren() {
DocumentInit init(url());
if (isXMLDocument()) {
if (isXHTMLDocument())
return XMLDocument::createXHTML(
init.withRegistrationContext(registrationContext()));
return XMLDocument::create(init);
}
return create(init);
}
void Document::cloneDataFromDocument(const Document& other) {
setCompatibilityMode(other.getCompatibilityMode());
setEncodingData(other.m_encodingData);
setContextFeatures(other.contextFeatures());
setSecurityOrigin(other.getSecurityOrigin()->isolatedCopy());
setMimeType(other.contentType());
}
bool Document::isSecureContextImpl(
const SecureContextCheck privilegeContextCheck) const {
// There may be exceptions for the secure context check defined for certain
// schemes. The exceptions are applied only to the special scheme and to
// sandboxed URLs from those origins, but *not* to any children.
//
// For example:
// <iframe src="http://host">
// <iframe src="scheme-has-exception://host"></iframe>
// <iframe sandbox src="scheme-has-exception://host"></iframe>
// </iframe>
// both inner iframes pass this check, assuming that the scheme
// "scheme-has-exception:" is granted an exception.
//
// However,
// <iframe src="http://host">
// <iframe sandbox src="http://host"></iframe>
// </iframe>
// would fail the check (that is, sandbox does not grant an exception itself).
//
// Additionally, with
// <iframe src="scheme-has-exception://host">
// <iframe src="http://host"></iframe>
// <iframe sandbox src="http://host"></iframe>
// </iframe>
// both inner iframes would fail the check, even though the outermost iframe
// passes.
//
// In all cases, a frame must be potentially trustworthy in addition to
// having an exception listed in order for the exception to be granted.
if (!getSecurityOrigin()->isPotentiallyTrustworthy())
return false;
if (SchemeRegistry::schemeShouldBypassSecureContextCheck(
getSecurityOrigin()->protocol()))
return true;
if (privilegeContextCheck == StandardSecureContextCheck) {
if (!m_frame)
return true;
Frame* parent = m_frame->tree().parent();
while (parent) {
if (!parent->securityContext()
->getSecurityOrigin()
->isPotentiallyTrustworthy())
return false;
parent = parent->tree().parent();
}
}
return true;
}
StyleSheetList& Document::styleSheets() {
if (!m_styleSheetList)
m_styleSheetList = StyleSheetList::create(this);
return *m_styleSheetList;
}
String Document::preferredStylesheetSet() const {
return m_styleEngine->preferredStylesheetSetName();
}
String Document::selectedStylesheetSet() const {
return m_styleEngine->selectedStylesheetSetName();
}
void Document::setSelectedStylesheetSet(const String& aString) {
styleEngine().setSelectedStylesheetSetName(aString);
}
void Document::evaluateMediaQueryListIfNeeded() {
if (!m_evaluateMediaQueriesOnStyleRecalc)
return;
evaluateMediaQueryList();
m_evaluateMediaQueriesOnStyleRecalc = false;
}
void Document::evaluateMediaQueryList() {
if (m_mediaQueryMatcher)
m_mediaQueryMatcher->mediaFeaturesChanged();
}
void Document::setResizedForViewportUnits() {
if (m_mediaQueryMatcher)
m_mediaQueryMatcher->viewportChanged();
if (!hasViewportUnits())
return;
ensureStyleResolver().setResizedForViewportUnits();
setNeedsStyleRecalcForViewportUnits();
}
void Document::clearResizedForViewportUnits() {
ensureStyleResolver().clearResizedForViewportUnits();
}
void Document::styleResolverMayHaveChanged() {
if (hasNodesWithPlaceholderStyle()) {
setNeedsStyleRecalc(SubtreeStyleChange,
StyleChangeReasonForTracing::create(
StyleChangeReason::CleanupPlaceholderStyles));
}
if (didLayoutWithPendingStylesheets() &&
!styleEngine().hasPendingScriptBlockingSheets()) {
// We need to manually repaint because we avoid doing all repaints in layout
// or style recalc while sheets are still loading to avoid FOUC.
m_pendingSheetLayout = IgnoreLayoutWithPendingSheets;
DCHECK(!layoutViewItem().isNull() || importsController());
if (!layoutViewItem().isNull())
layoutViewItem().invalidatePaintForViewAndCompositedLayers();
}
}
void Document::setHoverNode(Node* newHoverNode) {
m_hoverNode = newHoverNode;
}
void Document::setActiveHoverElement(Element* newActiveElement) {
if (!newActiveElement) {
m_activeHoverElement.clear();
return;
}
m_activeHoverElement = newActiveElement;
}
void Document::removeFocusedElementOfSubtree(Node* node,
bool amongChildrenOnly) {
if (!m_focusedElement)
return;
// We can't be focused if we're not in the document.
if (!node->isConnected())
return;
bool contains =
node->isShadowIncludingInclusiveAncestorOf(m_focusedElement.get());
if (contains && (m_focusedElement != node || !amongChildrenOnly))
clearFocusedElement();
}
void Document::hoveredNodeDetached(Element& element) {
if (!m_hoverNode)
return;
m_hoverNode->updateDistribution();
if (element != m_hoverNode &&
(!m_hoverNode->isTextNode() ||
element != FlatTreeTraversal::parent(*m_hoverNode)))
return;
m_hoverNode = FlatTreeTraversal::parent(element);
while (m_hoverNode && !m_hoverNode->layoutObject())
m_hoverNode = FlatTreeTraversal::parent(*m_hoverNode);
// If the mouse cursor is not visible, do not clear existing
// hover effects on the ancestors of |element| and do not invoke
// new hover effects on any other element.
if (!page()->isCursorVisible())
return;
if (frame())
frame()->eventHandler().scheduleHoverStateUpdate();
}
void Document::activeChainNodeDetached(Element& element) {
if (!m_activeHoverElement)
return;
if (element != m_activeHoverElement)
return;
Node* activeNode = FlatTreeTraversal::parent(element);
while (activeNode && activeNode->isElementNode() &&
!activeNode->layoutObject())
activeNode = FlatTreeTraversal::parent(*activeNode);
m_activeHoverElement = activeNode && activeNode->isElementNode()
? toElement(activeNode)
: nullptr;
}
const Vector<AnnotatedRegionValue>& Document::annotatedRegions() const {
return m_annotatedRegions;
}
void Document::setAnnotatedRegions(
const Vector<AnnotatedRegionValue>& regions) {
m_annotatedRegions = regions;
setAnnotatedRegionsDirty(false);
}
bool Document::setFocusedElement(Element* prpNewFocusedElement,
const FocusParams& params) {
DCHECK(!m_lifecycle.inDetach());
m_clearFocusedElementTimer.stop();
Element* newFocusedElement = prpNewFocusedElement;
// Make sure newFocusedNode is actually in this document
if (newFocusedElement && (newFocusedElement->document() != this))
return true;
if (NodeChildRemovalTracker::isBeingRemoved(newFocusedElement))
return true;
if (m_focusedElement == newFocusedElement)
return true;
bool focusChangeBlocked = false;
Element* oldFocusedElement = m_focusedElement;
m_focusedElement = nullptr;
// Remove focus from the existing focus node (if any)
if (oldFocusedElement) {
oldFocusedElement->setFocused(false);
// Dispatch the blur event and let the node do any other blur related
// activities (important for text fields)
// If page lost focus, blur event will have already been dispatched
if (page() && (page()->focusController().isFocused())) {
oldFocusedElement->dispatchBlurEvent(newFocusedElement, params.type,
params.sourceCapabilities);
if (m_focusedElement) {
// handler shifted focus
focusChangeBlocked = true;
newFocusedElement = nullptr;
}
// 'focusout' is a DOM level 3 name for the bubbling blur event.
oldFocusedElement->dispatchFocusOutEvent(EventTypeNames::focusout,
newFocusedElement,
params.sourceCapabilities);
// 'DOMFocusOut' is a DOM level 2 name for compatibility.
// FIXME: We should remove firing DOMFocusOutEvent event when we are sure
// no content depends on it, probably when <rdar://problem/8503958> is
// resolved.
oldFocusedElement->dispatchFocusOutEvent(EventTypeNames::DOMFocusOut,
newFocusedElement,
params.sourceCapabilities);
if (m_focusedElement) {
// handler shifted focus
focusChangeBlocked = true;
newFocusedElement = nullptr;
}
}
if (view()) {
Widget* oldWidget = widgetForElement(*oldFocusedElement);
if (oldWidget)
oldWidget->setFocused(false, params.type);
else
view()->setFocused(false, params.type);
}
}
if (newFocusedElement)
updateStyleAndLayoutTreeForNode(newFocusedElement);
if (newFocusedElement && newFocusedElement->isFocusable()) {
if (isRootEditableElement(*newFocusedElement) &&
!acceptsEditingFocus(*newFocusedElement)) {
// delegate blocks focus change
focusChangeBlocked = true;
goto SetFocusedElementDone;
}
// Set focus on the new node
m_focusedElement = newFocusedElement;
setSequentialFocusNavigationStartingPoint(m_focusedElement.get());
m_focusedElement->setFocused(true);
// Element::setFocused for frames can dispatch events.
if (m_focusedElement != newFocusedElement) {
focusChangeBlocked = true;
goto SetFocusedElementDone;
}
cancelFocusAppearanceUpdate();
m_focusedElement->updateFocusAppearance(params.selectionBehavior);
// Dispatch the focus event and let the node do any other focus related
// activities (important for text fields)
// If page lost focus, event will be dispatched on page focus, don't
// duplicate
if (page() && (page()->focusController().isFocused())) {
m_focusedElement->dispatchFocusEvent(oldFocusedElement, params.type,
params.sourceCapabilities);
if (m_focusedElement != newFocusedElement) {
// handler shifted focus
focusChangeBlocked = true;
goto SetFocusedElementDone;
}
// DOM level 3 bubbling focus event.
m_focusedElement->dispatchFocusInEvent(EventTypeNames::focusin,
oldFocusedElement, params.type,
params.sourceCapabilities);
if (m_focusedElement != newFocusedElement) {
// handler shifted focus
focusChangeBlocked = true;
goto SetFocusedElementDone;
}
// For DOM level 2 compatibility.
// FIXME: We should remove firing DOMFocusInEvent event when we are sure
// no content depends on it, probably when <rdar://problem/8503958> is m.
m_focusedElement->dispatchFocusInEvent(EventTypeNames::DOMFocusIn,
oldFocusedElement, params.type,
params.sourceCapabilities);
if (m_focusedElement != newFocusedElement) {
// handler shifted focus
focusChangeBlocked = true;
goto SetFocusedElementDone;
}
}
if (isRootEditableElement(*m_focusedElement))
frame()->spellChecker().didBeginEditing(m_focusedElement.get());
// eww, I suck. set the qt focus correctly
// ### find a better place in the code for this
if (view()) {
Widget* focusWidget = widgetForElement(*m_focusedElement);
if (focusWidget) {
// Make sure a widget has the right size before giving it focus.
// Otherwise, we are testing edge cases of the Widget code.
// Specifically, in WebCore this does not work well for text fields.
updateStyleAndLayout();
// Re-get the widget in case updating the layout changed things.
focusWidget = widgetForElement(*m_focusedElement);
}
if (focusWidget)
focusWidget->setFocused(true, params.type);
else
view()->setFocused(true, params.type);
}
}
if (!focusChangeBlocked && m_focusedElement) {
// Create the AXObject cache in a focus change because Chromium relies on
// it.
if (AXObjectCache* cache = axObjectCache())
cache->handleFocusedUIElementChanged(oldFocusedElement,
newFocusedElement);
}
if (!focusChangeBlocked && frameHost())
frameHost()->chromeClient().focusedNodeChanged(oldFocusedElement,
m_focusedElement.get());
SetFocusedElementDone:
updateStyleAndLayoutTree();
if (LocalFrame* frame = this->frame())
frame->selection().didChangeFocus();
return !focusChangeBlocked;
}
void Document::clearFocusedElement() {
setFocusedElement(nullptr, FocusParams(SelectionBehaviorOnFocus::None,
WebFocusTypeNone, nullptr));
}
void Document::setSequentialFocusNavigationStartingPoint(Node* node) {
if (!m_frame)
return;
if (!node) {
m_sequentialFocusNavigationStartingPoint = nullptr;
return;
}
DCHECK_EQ(node->document(), this);
if (!m_sequentialFocusNavigationStartingPoint)
m_sequentialFocusNavigationStartingPoint = Range::create(*this);
m_sequentialFocusNavigationStartingPoint->selectNodeContents(
node, ASSERT_NO_EXCEPTION);
}
Element* Document::sequentialFocusNavigationStartingPoint(
WebFocusType type) const {
if (m_focusedElement)
return m_focusedElement.get();
if (!m_sequentialFocusNavigationStartingPoint)
return nullptr;
if (!m_sequentialFocusNavigationStartingPoint->collapsed()) {
Node* node = m_sequentialFocusNavigationStartingPoint->startContainer();
DCHECK_EQ(node, m_sequentialFocusNavigationStartingPoint->endContainer());
if (node->isElementNode())
return toElement(node);
if (Element* neighborElement = type == WebFocusTypeForward
? ElementTraversal::previous(*node)
: ElementTraversal::next(*node))
return neighborElement;
return node->parentOrShadowHostElement();
}
// Range::selectNodeContents didn't select contents because the element had
// no children.
if (m_sequentialFocusNavigationStartingPoint->startContainer()
->isElementNode() &&
!m_sequentialFocusNavigationStartingPoint->startContainer()
->hasChildren() &&
m_sequentialFocusNavigationStartingPoint->startOffset() == 0)
return toElement(
m_sequentialFocusNavigationStartingPoint->startContainer());
// A node selected by Range::selectNodeContents was removed from the
// document tree.
if (Node* nextNode = m_sequentialFocusNavigationStartingPoint->firstNode()) {
if (type == WebFocusTypeForward)
return ElementTraversal::previous(*nextNode);
if (nextNode->isElementNode())
return toElement(nextNode);
return ElementTraversal::next(*nextNode);
}
return nullptr;
}
void Document::setCSSTarget(Element* newTarget) {
if (m_cssTarget)
m_cssTarget->pseudoStateChanged(CSSSelector::PseudoTarget);
m_cssTarget = newTarget;
if (m_cssTarget)
m_cssTarget->pseudoStateChanged(CSSSelector::PseudoTarget);
}
static void liveNodeListBaseWriteBarrier(void* parent,
const LiveNodeListBase* list) {
if (isHTMLCollectionType(list->type())) {
ScriptWrappableVisitor::writeBarrier(
parent, static_cast<const HTMLCollection*>(list));
} else {
ScriptWrappableVisitor::writeBarrier(
parent, static_cast<const LiveNodeList*>(list));
}
}
void Document::registerNodeList(const LiveNodeListBase* list) {
DCHECK(!m_nodeLists[list->invalidationType()].contains(list));
m_nodeLists[list->invalidationType()].add(list);
liveNodeListBaseWriteBarrier(this, list);
if (list->isRootedAtTreeScope())
m_listsInvalidatedAtDocument.add(list);
}
void Document::unregisterNodeList(const LiveNodeListBase* list) {
DCHECK(m_nodeLists[list->invalidationType()].contains(list));
m_nodeLists[list->invalidationType()].remove(list);
if (list->isRootedAtTreeScope()) {
DCHECK(m_listsInvalidatedAtDocument.contains(list));
m_listsInvalidatedAtDocument.remove(list);
}
}
void Document::registerNodeListWithIdNameCache(const LiveNodeListBase* list) {
DCHECK(!m_nodeLists[InvalidateOnIdNameAttrChange].contains(list));
m_nodeLists[InvalidateOnIdNameAttrChange].add(list);
liveNodeListBaseWriteBarrier(this, list);
}
void Document::unregisterNodeListWithIdNameCache(const LiveNodeListBase* list) {
DCHECK(m_nodeLists[InvalidateOnIdNameAttrChange].contains(list));
m_nodeLists[InvalidateOnIdNameAttrChange].remove(list);
}
void Document::attachNodeIterator(NodeIterator* ni) {
m_nodeIterators.add(ni);
}
void Document::detachNodeIterator(NodeIterator* ni) {
// The node iterator can be detached without having been attached if its root
// node didn't have a document when the iterator was created, but has it now.
m_nodeIterators.remove(ni);
}
void Document::moveNodeIteratorsToNewDocument(Node& node,
Document& newDocument) {
HeapHashSet<WeakMember<NodeIterator>> nodeIteratorsList = m_nodeIterators;
for (NodeIterator* ni : nodeIteratorsList) {
if (ni->root() == node) {
detachNodeIterator(ni);
newDocument.attachNodeIterator(ni);
}
}
}
void Document::didMoveTreeToNewDocument(const Node& root) {
DCHECK_NE(root.document(), this);
if (m_ranges.isEmpty())
return;
AttachedRangeSet ranges = m_ranges;
for (Range* range : ranges)
range->updateOwnerDocumentIfNeeded();
}
void Document::nodeChildrenWillBeRemoved(ContainerNode& container) {
EventDispatchForbiddenScope assertNoEventDispatch;
for (Range* range : m_ranges)
range->nodeChildrenWillBeRemoved(container);
for (NodeIterator* ni : m_nodeIterators) {
for (Node& n : NodeTraversal::childrenOf(container))
ni->nodeWillBeRemoved(n);
}
notifyNodeChildrenWillBeRemoved(container);
if (LocalFrame* frame = this->frame())
frame->selection().nodeChildrenWillBeRemoved(container);
if (containsV1ShadowTree()) {
for (Node& n : NodeTraversal::childrenOf(container))
n.checkSlotChangeBeforeRemoved();
}
}
void Document::nodeWillBeRemoved(Node& n) {
for (NodeIterator* ni : m_nodeIterators)
ni->nodeWillBeRemoved(n);
for (Range* range : m_ranges)
range->nodeWillBeRemoved(n);
notifyNodeWillBeRemoved(n);
if (LocalFrame* frame = this->frame()) {
frame->selection().nodeWillBeRemoved(n);
}
if (containsV1ShadowTree())
n.checkSlotChangeBeforeRemoved();
if (n.inActiveDocument() && n.isElementNode())
styleEngine().elementWillBeRemoved(toElement(n));
}
void Document::dataWillChange(const CharacterData& characterData) {
if (LocalFrame* frame = this->frame())
frame->selection().dataWillChange(characterData);
}
void Document::didInsertText(Node* text, unsigned offset, unsigned length) {
for (Range* range : m_ranges)
range->didInsertText(text, offset, length);
m_markers->shiftMarkers(text, offset, length);
}
void Document::didRemoveText(Node* text, unsigned offset, unsigned length) {
for (Range* range : m_ranges)
range->didRemoveText(text, offset, length);
m_markers->removeMarkers(text, offset, length);
m_markers->shiftMarkers(text, offset + length, 0 - length);
}
void Document::didMergeTextNodes(Text& oldNode, unsigned offset) {
if (!m_ranges.isEmpty()) {
NodeWithIndex oldNodeWithIndex(oldNode);
for (Range* range : m_ranges)
range->didMergeTextNodes(oldNodeWithIndex, offset);
}
notifyMergeTextNodes(oldNode, offset);
if (m_frame)
m_frame->selection().didMergeTextNodes(oldNode, offset);
// FIXME: This should update markers for spelling and grammar checking.
}
void Document::didSplitTextNode(const Text& oldNode) {
for (Range* range : m_ranges)
range->didSplitTextNode(oldNode);
notifySplitTextNode(oldNode);
if (m_frame)
m_frame->selection().didSplitTextNode(oldNode);
// FIXME: This should update markers for spelling and grammar checking.
}
void Document::setWindowAttributeEventListener(const AtomicString& eventType,
EventListener* listener) {
LocalDOMWindow* domWindow = this->domWindow();
if (!domWindow)
return;
domWindow->setAttributeEventListener(eventType, listener);
}
EventListener* Document::getWindowAttributeEventListener(
const AtomicString& eventType) {
LocalDOMWindow* domWindow = this->domWindow();
if (!domWindow)
return 0;
return domWindow->getAttributeEventListener(eventType);
}
EventQueue* Document::getEventQueue() const {
if (!m_domWindow)
return 0;
return m_domWindow->getEventQueue();
}
void Document::enqueueAnimationFrameTask(std::unique_ptr<WTF::Closure> task) {
ensureScriptedAnimationController().enqueueTask(std::move(task));
}
void Document::enqueueAnimationFrameEvent(Event* event) {
ensureScriptedAnimationController().enqueueEvent(event);
}
void Document::enqueueUniqueAnimationFrameEvent(Event* event) {
ensureScriptedAnimationController().enqueuePerFrameEvent(event);
}
void Document::enqueueScrollEventForNode(Node* target) {
// Per the W3C CSSOM View Module only scroll events fired at the document
// should bubble.
Event* scrollEvent = target->isDocumentNode()
? Event::createBubble(EventTypeNames::scroll)
: Event::create(EventTypeNames::scroll);
scrollEvent->setTarget(target);
ensureScriptedAnimationController().enqueuePerFrameEvent(scrollEvent);
}
void Document::enqueueResizeEvent() {
Event* event = Event::create(EventTypeNames::resize);
event->setTarget(domWindow());
ensureScriptedAnimationController().enqueuePerFrameEvent(event);
}
void Document::enqueueMediaQueryChangeListeners(
HeapVector<Member<MediaQueryListListener>>& listeners) {
ensureScriptedAnimationController().enqueueMediaQueryChangeListeners(
listeners);
}
void Document::enqueueVisualViewportScrollEvent() {
VisualViewportScrollEvent* event = VisualViewportScrollEvent::create();
event->setTarget(domWindow()->visualViewport());
ensureScriptedAnimationController().enqueuePerFrameEvent(event);
}
void Document::enqueueVisualViewportResizeEvent() {
VisualViewportResizeEvent* event = VisualViewportResizeEvent::create();
event->setTarget(domWindow()->visualViewport());
ensureScriptedAnimationController().enqueuePerFrameEvent(event);
}
void Document::dispatchEventsForPrinting() {
if (!m_scriptedAnimationController)
return;
m_scriptedAnimationController->dispatchEventsAndCallbacksForPrinting();
}
Document::EventFactorySet& Document::eventFactories() {
DEFINE_STATIC_LOCAL(EventFactorySet, s_eventFactory, ());
return s_eventFactory;
}
const OriginAccessEntry& Document::accessEntryFromURL() {
if (!m_accessEntryFromURL) {
m_accessEntryFromURL = WTF::wrapUnique(
new OriginAccessEntry(url().protocol(), url().host(),
OriginAccessEntry::AllowRegisterableDomains));
}
return *m_accessEntryFromURL;
}
void Document::sendSensitiveInputVisibility() {
if (m_sensitiveInputVisibilityTask.isActive())
return;
m_sensitiveInputVisibilityTask =
TaskRunnerHelper::get(TaskType::UnspecedLoading, this)
->postCancellableTask(
BLINK_FROM_HERE,
WTF::bind(&Document::sendSensitiveInputVisibilityInternal,
wrapWeakPersistent(this)));
}
void Document::sendSensitiveInputVisibilityInternal() {
if (!frame())
return;
mojom::blink::SensitiveInputVisibilityServicePtr sensitiveInputServicePtr;
frame()->interfaceProvider()->getInterface(
mojo::MakeRequest(&sensitiveInputServicePtr));
if (m_passwordCount > 0) {
sensitiveInputServicePtr->PasswordFieldVisibleInInsecureContext();
return;
}
sensitiveInputServicePtr->AllPasswordFieldsInInsecureContextInvisible();
}
void Document::runExecutionContextTask(
std::unique_ptr<ExecutionContextTask> task,
bool isInstrumented) {
InspectorInstrumentation::AsyncTask asyncTask(this, task.get(),
isInstrumented);
task->performTask(this);
}
void Document::registerEventFactory(
std::unique_ptr<EventFactoryBase> eventFactory) {
DCHECK(!eventFactories().contains(eventFactory.get()));
eventFactories().add(std::move(eventFactory));
}
Event* Document::createEvent(ExecutionContext* executionContext,
const String& eventType,
ExceptionState& exceptionState) {
Event* event = nullptr;
for (const auto& factory : eventFactories()) {
event = factory->create(executionContext, eventType);
if (event)
return event;
}
exceptionState.throwDOMException(
NotSupportedError,
"The provided event type ('" + eventType + "') is invalid.");
return nullptr;
}
void Document::addMutationEventListenerTypeIfEnabled(
ListenerType listenerType) {
if (ContextFeatures::mutationEventsEnabled(this))
addListenerType(listenerType);
}
void Document::addListenerTypeIfNeeded(const AtomicString& eventType) {
if (eventType == EventTypeNames::DOMSubtreeModified) {
UseCounter::count(*this, UseCounter::DOMSubtreeModifiedEvent);
addMutationEventListenerTypeIfEnabled(DOMSUBTREEMODIFIED_LISTENER);
} else if (eventType == EventTypeNames::DOMNodeInserted) {
UseCounter::count(*this, UseCounter::DOMNodeInsertedEvent);
addMutationEventListenerTypeIfEnabled(DOMNODEINSERTED_LISTENER);
} else if (eventType == EventTypeNames::DOMNodeRemoved) {
UseCounter::count(*this, UseCounter::DOMNodeRemovedEvent);
addMutationEventListenerTypeIfEnabled(DOMNODEREMOVED_LISTENER);
} else if (eventType == EventTypeNames::DOMNodeRemovedFromDocument) {
UseCounter::count(*this, UseCounter::DOMNodeRemovedFromDocumentEvent);
addMutationEventListenerTypeIfEnabled(DOMNODEREMOVEDFROMDOCUMENT_LISTENER);
} else if (eventType == EventTypeNames::DOMNodeInsertedIntoDocument) {
UseCounter::count(*this, UseCounter::DOMNodeInsertedIntoDocumentEvent);
addMutationEventListenerTypeIfEnabled(DOMNODEINSERTEDINTODOCUMENT_LISTENER);
} else if (eventType == EventTypeNames::DOMCharacterDataModified) {
UseCounter::count(*this, UseCounter::DOMCharacterDataModifiedEvent);
addMutationEventListenerTypeIfEnabled(DOMCHARACTERDATAMODIFIED_LISTENER);
} else if (eventType == EventTypeNames::webkitAnimationStart ||
eventType == EventTypeNames::animationstart) {
addListenerType(ANIMATIONSTART_LISTENER);
} else if (eventType == EventTypeNames::webkitAnimationEnd ||
eventType == EventTypeNames::animationend) {
addListenerType(ANIMATIONEND_LISTENER);
} else if (eventType == EventTypeNames::webkitAnimationIteration ||
eventType == EventTypeNames::animationiteration) {
addListenerType(ANIMATIONITERATION_LISTENER);
if (view()) {
// Need to re-evaluate time-to-effect-change for any running animations.
view()->scheduleAnimation();
}
} else if (eventType == EventTypeNames::webkitTransitionEnd ||
eventType == EventTypeNames::transitionend) {
addListenerType(TRANSITIONEND_LISTENER);
} else if (eventType == EventTypeNames::scroll) {
addListenerType(SCROLL_LISTENER);
}
}
HTMLFrameOwnerElement* Document::localOwner() const {
if (!frame())
return 0;
// FIXME: This probably breaks the attempts to layout after a load is finished
// in implicitClose(), and probably tons of other things...
return frame()->deprecatedLocalOwner();
}
void Document::willChangeFrameOwnerProperties(int marginWidth,
int marginHeight,
ScrollbarMode scrollingMode) {
if (!body())
return;
DCHECK(frame() && frame()->owner());
FrameOwner* owner = frame()->owner();
if (marginWidth != owner->marginWidth())
body()->setIntegralAttribute(marginwidthAttr, marginWidth);
if (marginHeight != owner->marginHeight())
body()->setIntegralAttribute(marginheightAttr, marginHeight);
if (scrollingMode != owner->scrollingMode() && view())
view()->setNeedsLayout();
}
bool Document::isInInvisibleSubframe() const {
if (!localOwner())
return false; // this is a local root element
// TODO(bokan): This looks like it doesn't work in OOPIF.
DCHECK(frame());
return frame()->ownerLayoutItem().isNull();
}
String Document::cookie(ExceptionState& exceptionState) const {
if (settings() && !settings()->getCookieEnabled())
return String();
// FIXME: The HTML5 DOM spec states that this attribute can raise an
// InvalidStateError exception on getting if the Document has no
// browsing context.
if (!getSecurityOrigin()->canAccessCookies()) {
if (isSandboxed(SandboxOrigin))
exceptionState.throwSecurityError(
"The document is sandboxed and lacks the 'allow-same-origin' flag.");
else if (url().protocolIs("data"))
exceptionState.throwSecurityError(
"Cookies are disabled inside 'data:' URLs.");
else
exceptionState.throwSecurityError("Access is denied for this document.");
return String();
}
// Suborigins are cookie-averse and thus should always return the empty
// string, unless the 'unsafe-cookies' option is provided.
if (getSecurityOrigin()->hasSuborigin() &&
!getSecurityOrigin()->suborigin()->policyContains(
Suborigin::SuboriginPolicyOptions::UnsafeCookies))
return String();
KURL cookieURL = this->cookieURL();
if (cookieURL.isEmpty())
return String();
return cookies(this, cookieURL);
}
void Document::setCookie(const String& value, ExceptionState& exceptionState) {
if (settings() && !settings()->getCookieEnabled())
return;
// FIXME: The HTML5 DOM spec states that this attribute can raise an
// InvalidStateError exception on setting if the Document has no
// browsing context.
if (!getSecurityOrigin()->canAccessCookies()) {
if (isSandboxed(SandboxOrigin))
exceptionState.throwSecurityError(
"The document is sandboxed and lacks the 'allow-same-origin' flag.");
else if (url().protocolIs("data"))
exceptionState.throwSecurityError(
"Cookies are disabled inside 'data:' URLs.");
else
exceptionState.throwSecurityError("Access is denied for this document.");
return;
}
// Suborigins are cookie-averse and thus setting should be a no-op, unless
// the 'unsafe-cookies' option is provided.
if (getSecurityOrigin()->hasSuborigin() &&
!getSecurityOrigin()->suborigin()->policyContains(
Suborigin::SuboriginPolicyOptions::UnsafeCookies))
return;
KURL cookieURL = this->cookieURL();
if (cookieURL.isEmpty())
return;
setCookies(this, cookieURL, value);
}
const AtomicString& Document::referrer() const {
if (loader())
return loader()->getRequest().httpReferrer();
return nullAtom;
}
String Document::domain() const {
return getSecurityOrigin()->domain();
}
void Document::setDomain(const String& rawDomain,
ExceptionState& exceptionState) {
UseCounter::count(*this, UseCounter::DocumentSetDomain);
if (isSandboxed(SandboxDocumentDomain)) {
exceptionState.throwSecurityError(
"Assignment is forbidden for sandboxed iframes.");
return;
}
if (SchemeRegistry::isDomainRelaxationForbiddenForURLScheme(
getSecurityOrigin()->protocol())) {
exceptionState.throwSecurityError("Assignment is forbidden for the '" +
getSecurityOrigin()->protocol() +
"' scheme.");
return;
}
bool success = false;
String newDomain = SecurityOrigin::canonicalizeHost(rawDomain, &success);
if (!success) {
exceptionState.throwSecurityError("'" + rawDomain +
"' could not be parsed properly.");
return;
}
if (newDomain.isEmpty()) {
exceptionState.throwSecurityError("'" + newDomain +
"' is an empty domain.");
return;
}
OriginAccessEntry accessEntry(getSecurityOrigin()->protocol(), newDomain,
OriginAccessEntry::AllowSubdomains);
OriginAccessEntry::MatchResult result =
accessEntry.matchesOrigin(*getSecurityOrigin());
if (result == OriginAccessEntry::DoesNotMatchOrigin) {
exceptionState.throwSecurityError(
"'" + newDomain + "' is not a suffix of '" + domain() + "'.");
return;
}
if (result == OriginAccessEntry::MatchesOriginButIsPublicSuffix) {
exceptionState.throwSecurityError("'" + newDomain +
"' is a top-level domain.");
return;
}
getSecurityOrigin()->setDomainFromDOM(newDomain);
if (m_frame)
m_frame->script().updateSecurityOrigin(getSecurityOrigin());
}
// http://www.whatwg.org/specs/web-apps/current-work/#dom-document-lastmodified
String Document::lastModified() const {
DateComponents date;
bool foundDate = false;
if (m_frame) {
if (DocumentLoader* documentLoader = loader()) {
const AtomicString& httpLastModified =
documentLoader->response().httpHeaderField(HTTPNames::Last_Modified);
if (!httpLastModified.isEmpty()) {
date.setMillisecondsSinceEpochForDateTime(
convertToLocalTime(parseDate(httpLastModified)));
foundDate = true;
}
}
}
// FIXME: If this document came from the file system, the HTML5
// specificiation tells us to read the last modification date from the file
// system.
if (!foundDate)
date.setMillisecondsSinceEpochForDateTime(
convertToLocalTime(currentTimeMS()));
return String::format("%02d/%02d/%04d %02d:%02d:%02d", date.month() + 1,
date.monthDay(), date.fullYear(), date.hour(),
date.minute(), date.second());
}
const KURL Document::firstPartyForCookies() const {
// TODO(mkwst): This doesn't properly handle HTML Import documents.
// If this is an imported document, grab its master document's first-party:
if (importsController() && importsController()->master() &&
importsController()->master() != this)
return importsController()->master()->firstPartyForCookies();
if (!frame())
return SecurityOrigin::urlWithUniqueSecurityOrigin();
// TODO(mkwst): This doesn't correctly handle sandboxed documents; we want to
// look at their URL, but we can't because we don't know what it is.
Frame* top = frame()->tree().top();
KURL topDocumentURL =
top->isLocalFrame()
? toLocalFrame(top)->document()->url()
: KURL(KURL(),
top->securityContext()->getSecurityOrigin()->toString());
if (SchemeRegistry::shouldTreatURLSchemeAsFirstPartyWhenTopLevel(
topDocumentURL.protocol()))
return topDocumentURL;
// We're intentionally using the URL of each document rather than the
// document's SecurityOrigin. Sandboxing a document into a unique origin
// shouldn't effect first-/third-party status for cookies and site data.
const OriginAccessEntry& accessEntry =
top->isLocalFrame()
? toLocalFrame(top)->document()->accessEntryFromURL()
: OriginAccessEntry(topDocumentURL.protocol(), topDocumentURL.host(),
OriginAccessEntry::AllowRegisterableDomains);
const Frame* currentFrame = frame();
while (currentFrame) {
// Skip over srcdoc documents, as they are always same-origin with their
// closest non-srcdoc parent.
while (currentFrame->isLocalFrame() &&
toLocalFrame(currentFrame)->document()->isSrcdocDocument())
currentFrame = currentFrame->tree().parent();
DCHECK(currentFrame);
// We use 'matchesDomain' here, as it turns out that some folks embed HTTPS
// login forms
// into HTTP pages; we should allow this kind of upgrade.
if (accessEntry.matchesDomain(
*currentFrame->securityContext()->getSecurityOrigin()) ==
OriginAccessEntry::DoesNotMatchOrigin)
return SecurityOrigin::urlWithUniqueSecurityOrigin();
currentFrame = currentFrame->tree().parent();
}
return topDocumentURL;
}
static bool isValidNameNonASCII(const LChar* characters, unsigned length) {
if (!isValidNameStart(characters[0]))
return false;
for (unsigned i = 1; i < length; ++i) {
if (!isValidNamePart(characters[i]))
return false;
}
return true;
}
static bool isValidNameNonASCII(const UChar* characters, unsigned length) {
for (unsigned i = 0; i < length;) {
bool first = i == 0;
UChar32 c;
U16_NEXT(characters, i, length, c); // Increments i.
if (first ? !isValidNameStart(c) : !isValidNamePart(c))
return false;
}
return true;
}
template <typename CharType>
static inline bool isValidNameASCII(const CharType* characters,
unsigned length) {
CharType c = characters[0];
if (!(isASCIIAlpha(c) || c == ':' || c == '_'))
return false;
for (unsigned i = 1; i < length; ++i) {
c = characters[i];
if (!(isASCIIAlphanumeric(c) || c == ':' || c == '_' || c == '-' ||
c == '.'))
return false;
}
return true;
}
bool Document::isValidName(const String& name) {
unsigned length = name.length();
if (!length)
return false;
if (name.is8Bit()) {
const LChar* characters = name.characters8();
if (isValidNameASCII(characters, length))
return true;
return isValidNameNonASCII(characters, length);
}
const UChar* characters = name.characters16();
if (isValidNameASCII(characters, length))
return true;
return isValidNameNonASCII(characters, length);
}
enum QualifiedNameStatus {
QNValid,
QNMultipleColons,
QNInvalidStartChar,
QNInvalidChar,
QNEmptyPrefix,
QNEmptyLocalName
};
struct ParseQualifiedNameResult {
QualifiedNameStatus status;
UChar32 character;
ParseQualifiedNameResult() {}
explicit ParseQualifiedNameResult(QualifiedNameStatus status)
: status(status) {}
ParseQualifiedNameResult(QualifiedNameStatus status, UChar32 character)
: status(status), character(character) {}
};
template <typename CharType>
static ParseQualifiedNameResult parseQualifiedNameInternal(
const AtomicString& qualifiedName,
const CharType* characters,
unsigned length,
AtomicString& prefix,
AtomicString& localName) {
bool nameStart = true;
bool sawColon = false;
int colonPos = 0;
for (unsigned i = 0; i < length;) {
UChar32 c;
U16_NEXT(characters, i, length, c)
if (c == ':') {
if (sawColon)
return ParseQualifiedNameResult(QNMultipleColons);
nameStart = true;
sawColon = true;
colonPos = i - 1;
} else if (nameStart) {
if (!isValidNameStart(c))
return ParseQualifiedNameResult(QNInvalidStartChar, c);
nameStart = false;
} else {
if (!isValidNamePart(c))
return ParseQualifiedNameResult(QNInvalidChar, c);
}
}
if (!sawColon) {
prefix = nullAtom;
localName = qualifiedName;
} else {
prefix = AtomicString(characters, colonPos);
if (prefix.isEmpty())
return ParseQualifiedNameResult(QNEmptyPrefix);
int prefixStart = colonPos + 1;
localName = AtomicString(characters + prefixStart, length - prefixStart);
}
if (localName.isEmpty())
return ParseQualifiedNameResult(QNEmptyLocalName);
return ParseQualifiedNameResult(QNValid);
}
bool Document::parseQualifiedName(const AtomicString& qualifiedName,
AtomicString& prefix,
AtomicString& localName,
ExceptionState& exceptionState) {
unsigned length = qualifiedName.length();
if (!length) {
exceptionState.throwDOMException(InvalidCharacterError,
"The qualified name provided is empty.");
return false;
}
ParseQualifiedNameResult returnValue;
if (qualifiedName.is8Bit())
returnValue = parseQualifiedNameInternal(
qualifiedName, qualifiedName.characters8(), length, prefix, localName);
else
returnValue = parseQualifiedNameInternal(
qualifiedName, qualifiedName.characters16(), length, prefix, localName);
if (returnValue.status == QNValid)
return true;
StringBuilder message;
message.append("The qualified name provided ('");
message.append(qualifiedName);
message.append("') ");
if (returnValue.status == QNMultipleColons) {
message.append("contains multiple colons.");
} else if (returnValue.status == QNInvalidStartChar) {
message.append("contains the invalid name-start character '");
message.append(returnValue.character);
message.append("'.");
} else if (returnValue.status == QNInvalidChar) {
message.append("contains the invalid character '");
message.append(returnValue.character);
message.append("'.");
} else if (returnValue.status == QNEmptyPrefix) {
message.append("has an empty namespace prefix.");
} else {
DCHECK_EQ(returnValue.status, QNEmptyLocalName);
message.append("has an empty local name.");
}
if (returnValue.status == QNInvalidStartChar ||
returnValue.status == QNInvalidChar)
exceptionState.throwDOMException(InvalidCharacterError, message.toString());
else
exceptionState.throwDOMException(NamespaceError, message.toString());
return false;
}
void Document::setEncodingData(const DocumentEncodingData& newData) {
// It's possible for the encoding of the document to change while we're
// decoding data. That can only occur while we're processing the <head>
// portion of the document. There isn't much user-visible content in the
// <head>, but there is the <title> element. This function detects that
// situation and re-decodes the document's title so that the user doesn't see
// an incorrectly decoded title in the title bar.
if (m_titleElement && encoding() != newData.encoding() &&
!ElementTraversal::firstWithin(*m_titleElement) &&
encoding() == Latin1Encoding() &&
m_titleElement->textContent().containsOnlyLatin1()) {
CString originalBytes = m_titleElement->textContent().latin1();
std::unique_ptr<TextCodec> codec = newTextCodec(newData.encoding());
String correctlyDecodedTitle =
codec->decode(originalBytes.data(), originalBytes.length(), DataEOF);
m_titleElement->setTextContent(correctlyDecodedTitle);
}
DCHECK(newData.encoding().isValid());
m_encodingData = newData;
// FIXME: Should be removed as part of
// https://code.google.com/p/chromium/issues/detail?id=319643
bool shouldUseVisualOrdering = m_encodingData.encoding().usesVisualOrdering();
if (shouldUseVisualOrdering != m_visuallyOrdered) {
m_visuallyOrdered = shouldUseVisualOrdering;
// FIXME: How is possible to not have a layoutObject here?
if (!layoutViewItem().isNull()) {
layoutViewItem().mutableStyleRef().setRtlOrdering(
m_visuallyOrdered ? EOrder::kVisual : EOrder::kLogical);
}
setNeedsStyleRecalc(SubtreeStyleChange,
StyleChangeReasonForTracing::create(
StyleChangeReason::VisuallyOrdered));
}
}
KURL Document::completeURL(const String& url) const {
return completeURLWithOverride(url, m_baseURL);
}
KURL Document::completeURLWithOverride(const String& url,
const KURL& baseURLOverride) const {
DCHECK(baseURLOverride.isEmpty() || baseURLOverride.isValid());
// Always return a null URL when passed a null string.
// FIXME: Should we change the KURL constructor to have this behavior?
// See also [CSS]StyleSheet::completeURL(const String&)
if (url.isNull())
return KURL();
// This logic is deliberately spread over many statements in an attempt to
// track down http://crbug.com/312410.
const KURL& baseURL = baseURLForOverride(baseURLOverride);
if (!encoding().isValid())
return KURL(baseURL, url);
return KURL(baseURL, url, encoding());
}
const KURL& Document::baseURLForOverride(const KURL& baseURLOverride) const {
// This logic is deliberately spread over many statements in an attempt to
// track down http://crbug.com/312410.
const KURL* baseURLFromParent = 0;
bool shouldUseParentBaseURL = baseURLOverride.isEmpty();
if (!shouldUseParentBaseURL) {
const KURL& aboutBlankURL = blankURL();
shouldUseParentBaseURL = (baseURLOverride == aboutBlankURL);
}
if (shouldUseParentBaseURL) {
if (Document* parent = parentDocument())
baseURLFromParent = &parent->baseURL();
}
return baseURLFromParent ? *baseURLFromParent : baseURLOverride;
}
KURL Document::openSearchDescriptionURL() {
static const char openSearchMIMEType[] =
"application/opensearchdescription+xml";
static const char openSearchRelation[] = "search";
// FIXME: Why do only top-level frames have openSearchDescriptionURLs?
if (!frame() || frame()->tree().parent())
return KURL();
// FIXME: Why do we need to wait for load completion?
if (!loadEventFinished())
return KURL();
if (!head())
return KURL();
for (HTMLLinkElement* linkElement =
Traversal<HTMLLinkElement>::firstChild(*head());
linkElement;
linkElement = Traversal<HTMLLinkElement>::nextSibling(*linkElement)) {
if (!equalIgnoringCase(linkElement->type(), openSearchMIMEType) ||
!equalIgnoringCase(linkElement->rel(), openSearchRelation))
continue;
if (linkElement->href().isEmpty())
continue;
// Count usage; perhaps we can lock this to secure contexts.
UseCounter::Feature osdDisposition;
RefPtr<SecurityOrigin> target = SecurityOrigin::create(linkElement->href());
if (isSecureContext()) {
osdDisposition = target->isPotentiallyTrustworthy()
? UseCounter::OpenSearchSecureOriginSecureTarget
: UseCounter::OpenSearchSecureOriginInsecureTarget;
} else {
osdDisposition = target->isPotentiallyTrustworthy()
? UseCounter::OpenSearchInsecureOriginSecureTarget
: UseCounter::OpenSearchInsecureOriginInsecureTarget;
}
UseCounter::count(*this, osdDisposition);
return linkElement->href();
}
return KURL();
}
void Document::currentScriptForBinding(
HTMLScriptElementOrSVGScriptElement& scriptElement) const {
if (Element* script = currentScript()) {
if (script->isInV1ShadowTree())
return;
if (isHTMLScriptElement(script))
scriptElement.setHTMLScriptElement(toHTMLScriptElement(script));
else if (isSVGScriptElement(script))
scriptElement.setSVGScriptElement(toSVGScriptElement(script));
}
}
void Document::pushCurrentScript(Element* newCurrentScript) {
DCHECK(isHTMLScriptElement(newCurrentScript) ||
isSVGScriptElement(newCurrentScript));
m_currentScriptStack.push_back(newCurrentScript);
}
void Document::popCurrentScript() {
DCHECK(!m_currentScriptStack.isEmpty());
m_currentScriptStack.pop_back();
}
void Document::setTransformSource(std::unique_ptr<TransformSource> source) {
m_transformSource = std::move(source);
}
String Document::designMode() const {
return inDesignMode() ? "on" : "off";
}
void Document::setDesignMode(const String& value) {
bool newValue = m_designMode;
if (equalIgnoringCase(value, "on")) {
newValue = true;
UseCounter::count(*this, UseCounter::DocumentDesignModeEnabeld);
} else if (equalIgnoringCase(value, "off")) {
newValue = false;
}
if (newValue == m_designMode)
return;
m_designMode = newValue;
setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(
StyleChangeReason::DesignMode));
}
Document* Document::parentDocument() const {
if (!m_frame)
return 0;
Frame* parent = m_frame->tree().parent();
if (!parent || !parent->isLocalFrame())
return 0;
return toLocalFrame(parent)->document();
}
Document& Document::topDocument() const {
// FIXME: Not clear what topDocument() should do in the OOPI case--should it
// return the topmost available Document, or something else?
Document* doc = const_cast<Document*>(this);
for (HTMLFrameOwnerElement* element = doc->localOwner(); element;
element = doc->localOwner())
doc = &element->document();
DCHECK(doc);
return *doc;
}
Document* Document::contextDocument() {
if (m_contextDocument)
return m_contextDocument;
if (m_frame)
return this;
return nullptr;
}
Attr* Document::createAttribute(const AtomicString& name,
ExceptionState& exceptionState) {
return createAttributeNS(nullAtom, convertLocalName(name), exceptionState,
true);
}
Attr* Document::createAttributeNS(const AtomicString& namespaceURI,
const AtomicString& qualifiedName,
ExceptionState& exceptionState,
bool shouldIgnoreNamespaceChecks) {
AtomicString prefix, localName;
if (!parseQualifiedName(qualifiedName, prefix, localName, exceptionState))
return nullptr;
QualifiedName qName(prefix, localName, namespaceURI);
if (!shouldIgnoreNamespaceChecks && !hasValidNamespaceForAttributes(qName)) {
exceptionState.throwDOMException(
NamespaceError,
"The namespace URI provided ('" + namespaceURI +
"') is not valid for the qualified name provided ('" +
qualifiedName + "').");
return nullptr;
}
return Attr::create(*this, qName, emptyAtom);
}
const SVGDocumentExtensions* Document::svgExtensions() {
return m_svgExtensions.get();
}
SVGDocumentExtensions& Document::accessSVGExtensions() {
if (!m_svgExtensions)
m_svgExtensions = new SVGDocumentExtensions(this);
return *m_svgExtensions;
}
bool Document::hasSVGRootNode() const {
return isSVGSVGElement(documentElement());
}
HTMLCollection* Document::images() {
return ensureCachedCollection<HTMLCollection>(DocImages);
}
HTMLCollection* Document::applets() {
return ensureCachedCollection<HTMLCollection>(DocApplets);
}
HTMLCollection* Document::embeds() {
return ensureCachedCollection<HTMLCollection>(DocEmbeds);
}
HTMLCollection* Document::scripts() {
return ensureCachedCollection<HTMLCollection>(DocScripts);
}
HTMLCollection* Document::links() {
return ensureCachedCollection<HTMLCollection>(DocLinks);
}
HTMLCollection* Document::forms() {
return ensureCachedCollection<HTMLCollection>(DocForms);
}
HTMLCollection* Document::anchors() {
return ensureCachedCollection<HTMLCollection>(DocAnchors);
}
HTMLAllCollection* Document::all() {
return ensureCachedCollection<HTMLAllCollection>(DocAll);
}
HTMLCollection* Document::windowNamedItems(const AtomicString& name) {
return ensureCachedCollection<WindowNameCollection>(WindowNamedItems, name);
}
DocumentNameCollection* Document::documentNamedItems(const AtomicString& name) {
return ensureCachedCollection<DocumentNameCollection>(DocumentNamedItems,
name);
}
void Document::finishedParsing() {
DCHECK(!scriptableDocumentParser() || !m_parser->isParsing());
DCHECK(!scriptableDocumentParser() || m_readyState != Loading);
setParsingState(InDOMContentLoaded);
DocumentParserTiming::from(*this).markParserStop();
// FIXME: DOMContentLoaded is dispatched synchronously, but this should be
// dispatched in a queued task, see https://crbug.com/425790
if (!m_documentTiming.domContentLoadedEventStart())
m_documentTiming.markDomContentLoadedEventStart();
dispatchEvent(Event::createBubble(EventTypeNames::DOMContentLoaded));
if (!m_documentTiming.domContentLoadedEventEnd())
m_documentTiming.markDomContentLoadedEventEnd();
setParsingState(FinishedParsing);
// Ensure Custom Element callbacks are drained before DOMContentLoaded.
// FIXME: Remove this ad-hoc checkpoint when DOMContentLoaded is dispatched in
// a queued task, which will do a checkpoint anyway. https://crbug.com/425790
Microtask::performCheckpoint(V8PerIsolateData::mainThreadIsolate());
if (LocalFrame* frame = this->frame()) {
// Don't update the layout tree if we haven't requested the main resource
// yet to avoid adding extra latency. Note that the first layout tree update
// can be expensive since it triggers the parsing of the default stylesheets
// which are compiled-in.
const bool mainResourceWasAlreadyRequested =
frame->loader().stateMachine()->committedFirstRealDocumentLoad();
// FrameLoader::finishedParsing() might end up calling
// Document::implicitClose() if all resource loads are
// complete. HTMLObjectElements can start loading their resources from post
// attach callbacks triggered by recalcStyle(). This means if we parse out
// an <object> tag and then reach the end of the document without updating
// styles, we might not have yet started the resource load and might fire
// the window load event too early. To avoid this we force the styles to be
// up to date before calling FrameLoader::finishedParsing(). See
// https://bugs.webkit.org/show_bug.cgi?id=36864 starting around comment 35.
if (mainResourceWasAlreadyRequested)
updateStyleAndLayoutTree();
beginLifecycleUpdatesIfRenderingReady();
frame->loader().finishedParsing();
TRACE_EVENT_INSTANT1("devtools.timeline", "MarkDOMContent",
TRACE_EVENT_SCOPE_THREAD, "data",
InspectorMarkLoadEvent::data(frame));
InspectorInstrumentation::domContentLoadedEventFired(frame);
}
// Schedule dropping of the ElementDataCache. We keep it alive for a while
// after parsing finishes so that dynamically inserted content can also
// benefit from sharing optimizations. Note that we don't refresh the timer
// on cache access since that could lead to huge caches being kept alive
// indefinitely by something innocuous like JS setting .innerHTML repeatedly
// on a timer.
m_elementDataCacheClearTimer.startOneShot(10, BLINK_FROM_HERE);
// Parser should have picked up all preloads by now
m_fetcher->clearPreloads(ResourceFetcher::ClearSpeculativeMarkupPreloads);
if (isPrefetchOnly())
WebPrerenderingSupport::current()->prefetchFinished();
}
void Document::elementDataCacheClearTimerFired(TimerBase*) {
m_elementDataCache.clear();
}
void Document::beginLifecycleUpdatesIfRenderingReady() {
if (!isActive())
return;
if (!isRenderingReady())
return;
view()->beginLifecycleUpdates();
}
Vector<IconURL> Document::iconURLs(int iconTypesMask) {
IconURL firstFavicon;
IconURL firstTouchIcon;
IconURL firstTouchPrecomposedIcon;
Vector<IconURL> secondaryIcons;
using TraversalFunction = HTMLLinkElement* (*)(const Node&);
TraversalFunction findNextCandidate =
&Traversal<HTMLLinkElement>::nextSibling;
HTMLLinkElement* firstElement = nullptr;
if (head()) {
firstElement = Traversal<HTMLLinkElement>::firstChild(*head());
} else if (isSVGDocument() && isSVGSVGElement(documentElement())) {
firstElement = Traversal<HTMLLinkElement>::firstWithin(*documentElement());
findNextCandidate = &Traversal<HTMLLinkElement>::next;
}
// Start from the first child node so that icons seen later take precedence as
// required by the spec.
for (HTMLLinkElement* linkElement = firstElement; linkElement;
linkElement = findNextCandidate(*linkElement)) {
if (!(linkElement->getIconType() & iconTypesMask))
continue;
if (linkElement->href().isEmpty())
continue;
IconURL newURL(linkElement->href(), linkElement->iconSizes(),
linkElement->type(), linkElement->getIconType());
if (linkElement->getIconType() == Favicon) {
if (firstFavicon.m_iconType != InvalidIcon)
secondaryIcons.push_back(firstFavicon);
firstFavicon = newURL;
} else if (linkElement->getIconType() == TouchIcon) {
if (firstTouchIcon.m_iconType != InvalidIcon)
secondaryIcons.push_back(firstTouchIcon);
firstTouchIcon = newURL;
} else if (linkElement->getIconType() == TouchPrecomposedIcon) {
if (firstTouchPrecomposedIcon.m_iconType != InvalidIcon)
secondaryIcons.push_back(firstTouchPrecomposedIcon);
firstTouchPrecomposedIcon = newURL;
} else {
NOTREACHED();
}
}
Vector<IconURL> iconURLs;
if (firstFavicon.m_iconType != InvalidIcon)
iconURLs.push_back(firstFavicon);
else if (m_url.protocolIsInHTTPFamily() && iconTypesMask & Favicon)
iconURLs.push_back(IconURL::defaultFavicon(m_url));
if (firstTouchIcon.m_iconType != InvalidIcon)
iconURLs.push_back(firstTouchIcon);
if (firstTouchPrecomposedIcon.m_iconType != InvalidIcon)
iconURLs.push_back(firstTouchPrecomposedIcon);
for (int i = secondaryIcons.size() - 1; i >= 0; --i)
iconURLs.push_back(secondaryIcons[i]);
return iconURLs;
}
Color Document::themeColor() const {
auto rootElement = documentElement();
if (!rootElement)
return Color();
for (HTMLMetaElement& metaElement :
Traversal<HTMLMetaElement>::descendantsOf(*rootElement)) {
Color color = Color::transparent;
if (equalIgnoringCase(metaElement.name(), "theme-color") &&
CSSParser::parseColor(
color, metaElement.content().getString().stripWhiteSpace(), true))
return color;
}
return Color();
}
HTMLLinkElement* Document::linkManifest() const {
HTMLHeadElement* head = this->head();
if (!head)
return 0;
// The first link element with a manifest rel must be used. Others are
// ignored.
for (HTMLLinkElement* linkElement =
Traversal<HTMLLinkElement>::firstChild(*head);
linkElement;
linkElement = Traversal<HTMLLinkElement>::nextSibling(*linkElement)) {
if (!linkElement->relAttribute().isManifest())
continue;
return linkElement;
}
return 0;
}
void Document::initSecurityContext(const DocumentInit& initializer) {
DCHECK(!getSecurityOrigin());
if (!initializer.hasSecurityContext()) {
// No source for a security context.
// This can occur via document.implementation.createDocument().
m_cookieURL = KURL(ParsedURLString, emptyString());
setSecurityOrigin(SecurityOrigin::createUnique());
initContentSecurityPolicy();
// Unique security origins cannot have a suborigin
return;
}
// In the common case, create the security context from the currently
// loading URL with a fresh content security policy.
enforceSandboxFlags(initializer.getSandboxFlags());
setInsecureRequestPolicy(initializer.getInsecureRequestPolicy());
if (initializer.insecureNavigationsToUpgrade()) {
for (auto toUpgrade : *initializer.insecureNavigationsToUpgrade())
addInsecureNavigationUpgrade(toUpgrade);
}
if (isSandboxed(SandboxOrigin)) {
m_cookieURL = m_url;
setSecurityOrigin(SecurityOrigin::createUnique());
// If we're supposed to inherit our security origin from our
// owner, but we're also sandboxed, the only things we inherit are
// the origin's potential trustworthiness and the ability to
// load local resources. The latter lets about:blank iframes in
// file:// URL documents load images and other resources from
// the file system.
if (initializer.owner() &&
initializer.owner()->getSecurityOrigin()->isPotentiallyTrustworthy())
getSecurityOrigin()->setUniqueOriginIsPotentiallyTrustworthy(true);
if (initializer.owner() &&
initializer.owner()->getSecurityOrigin()->canLoadLocalResources())
getSecurityOrigin()->grantLoadLocalResources();
} else if (initializer.owner()) {
m_cookieURL = initializer.owner()->cookieURL();
// We alias the SecurityOrigins to match Firefox, see Bug 15313
// https://bugs.webkit.org/show_bug.cgi?id=15313
setSecurityOrigin(initializer.owner()->getSecurityOrigin());
} else {
m_cookieURL = m_url;
setSecurityOrigin(SecurityOrigin::create(m_url));
}
// Set the address space before setting up CSP, as the latter may override
// the former via the 'treat-as-public-address' directive (see
// https://mikewest.github.io/cors-rfc1918/#csp).
if (initializer.isHostedInReservedIPRange()) {
setAddressSpace(getSecurityOrigin()->isLocalhost()
? WebAddressSpaceLocal
: WebAddressSpacePrivate);
} else if (getSecurityOrigin()->isLocal()) {
// "Local" security origins (like 'file://...') are treated as having
// a local address space.
//
// TODO(mkwst): It's not entirely clear that this is a good idea.
setAddressSpace(WebAddressSpaceLocal);
} else {
setAddressSpace(WebAddressSpacePublic);
}
if (importsController()) {
// If this document is an HTML import, grab a reference to it's master
// document's Content Security Policy. We don't call
// 'initContentSecurityPolicy' in this case, as we can't rebind the master
// document's policy object: its ExecutionContext needs to remain tied to
// the master document.
setContentSecurityPolicy(
importsController()->master()->contentSecurityPolicy());
} else {
initContentSecurityPolicy();
}
if (getSecurityOrigin()->hasSuborigin())
enforceSuborigin(*getSecurityOrigin()->suborigin());
if (Settings* settings = initializer.settings()) {
if (!settings->getWebSecurityEnabled()) {
// Web security is turned off. We should let this document access every
// other document. This is used primary by testing harnesses for web
// sites.
getSecurityOrigin()->grantUniversalAccess();
} else if (getSecurityOrigin()->isLocal()) {
if (settings->getAllowUniversalAccessFromFileURLs()) {
// Some clients want local URLs to have universal access, but that
// setting is dangerous for other clients.
getSecurityOrigin()->grantUniversalAccess();
} else if (!settings->getAllowFileAccessFromFileURLs()) {
// Some clients do not want local URLs to have access to other local
// URLs.
getSecurityOrigin()->blockLocalAccessFromLocalOrigin();
}
}
}
if (initializer.shouldTreatURLAsSrcdocDocument()) {
m_isSrcdocDocument = true;
setBaseURLOverride(initializer.parentBaseURL());
}
if (getSecurityOrigin()->isUnique() &&
SecurityOrigin::create(m_url)->isPotentiallyTrustworthy())
getSecurityOrigin()->setUniqueOriginIsPotentiallyTrustworthy(true);
if (getSecurityOrigin()->hasSuborigin())
enforceSuborigin(*getSecurityOrigin()->suborigin());
}
void Document::initContentSecurityPolicy(ContentSecurityPolicy* csp) {
setContentSecurityPolicy(csp ? csp : ContentSecurityPolicy::create());
// We inherit the parent/opener's CSP for documents with "local" schemes:
// 'about', 'blob', 'data', and 'filesystem'. We also inherit CSP for
// documents with empty/invalid URLs because we treat those URLs as
// 'about:blank' in Blink.
//
// https://w3c.github.io/webappsec-csp/#initialize-document-csp
//
// TODO(dcheng): This is similar enough to work we're doing in
// 'DocumentLoader::ensureWriter' that it might make sense to combine them.
if (m_frame) {
Frame* inheritFrom = m_frame->tree().parent() ? m_frame->tree().parent()
: m_frame->client()->opener();
if (inheritFrom && m_frame != inheritFrom) {
DCHECK(inheritFrom->securityContext() &&
inheritFrom->securityContext()->contentSecurityPolicy());
ContentSecurityPolicy* policyToInherit =
inheritFrom->securityContext()->contentSecurityPolicy();
if (m_url.isEmpty() || m_url.protocolIsAbout() ||
m_url.protocolIsData() || m_url.protocolIs("blob") ||
m_url.protocolIs("filesystem")) {
contentSecurityPolicy()->copyStateFrom(policyToInherit);
}
// Plugin documents inherit their parent/opener's 'plugin-types' directive
// regardless of URL.
if (isPluginDocument())
contentSecurityPolicy()->copyPluginTypesFrom(policyToInherit);
}
}
contentSecurityPolicy()->bindToExecutionContext(this);
}
bool Document::isSecureTransitionTo(const KURL& url) const {
RefPtr<SecurityOrigin> other = SecurityOrigin::create(url);
return getSecurityOrigin()->canAccess(other.get());
}
bool Document::allowInlineEventHandler(Node* node,
EventListener* listener,
const String& contextURL,
const WTF::OrdinalNumber& contextLine) {
Element* element = node && node->isElementNode() ? toElement(node) : nullptr;
if (!ContentSecurityPolicy::shouldBypassMainWorld(this) &&
!contentSecurityPolicy()->allowInlineEventHandler(
element, listener->code(), contextURL, contextLine))
return false;
// HTML says that inline script needs browsing context to create its execution
// environment.
// http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#event-handler-attributes
// Also, if the listening node came from other document, which happens on
// context-less event dispatching, we also need to ask the owner document of
// the node.
LocalFrame* frame = executingFrame();
if (!frame)
return false;
if (!frame->script().canExecuteScripts(NotAboutToExecuteScript))
return false;
if (node && node->document() != this &&
!node->document().allowInlineEventHandler(node, listener, contextURL,
contextLine))
return false;
return true;
}
bool Document::allowExecutingScripts(Node* node) {
// FIXME: Eventually we'd like to evaluate scripts which are inserted into a
// viewless document but this'll do for now.
// See http://bugs.webkit.org/show_bug.cgi?id=5727
LocalFrame* frame = executingFrame();
if (!frame)
return false;
if (!node->document().executingFrame())
return false;
if (!frame->script().canExecuteScripts(AboutToExecuteScript))
return false;
return true;
}
void Document::enforceSandboxFlags(SandboxFlags mask) {
RefPtr<SecurityOrigin> standInOrigin = getSecurityOrigin();
applySandboxFlags(mask);
// Send a notification if the origin has been updated.
if (standInOrigin && !standInOrigin->isUnique() &&
getSecurityOrigin()->isUnique()) {
getSecurityOrigin()->setUniqueOriginIsPotentiallyTrustworthy(
standInOrigin->isPotentiallyTrustworthy());
if (frame())
frame()->loader().client()->didUpdateToUniqueOrigin();
}
}
void Document::updateSecurityOrigin(PassRefPtr<SecurityOrigin> origin) {
setSecurityOrigin(std::move(origin));
didUpdateSecurityOrigin();
}
void Document::didUpdateSecurityOrigin() {
if (!m_frame)
return;
m_frame->script().updateSecurityOrigin(getSecurityOrigin());
}
bool Document::isContextThread() const {
return isMainThread();
}
void Document::updateFocusAppearanceSoon(
SelectionBehaviorOnFocus selectionbehavioronfocus) {
m_updateFocusAppearanceSelectionBahavior = selectionbehavioronfocus;
if (!m_updateFocusAppearanceTimer.isActive())
m_updateFocusAppearanceTimer.startOneShot(0, BLINK_FROM_HERE);
}
void Document::cancelFocusAppearanceUpdate() {
m_updateFocusAppearanceTimer.stop();
}
void Document::updateFocusAppearanceTimerFired(TimerBase*) {
Element* element = focusedElement();
if (!element)
return;
updateStyleAndLayout();
if (element->isFocusable())
element->updateFocusAppearance(m_updateFocusAppearanceSelectionBahavior);
}
void Document::attachRange(Range* range) {
DCHECK(!m_ranges.contains(range));
m_ranges.add(range);
}
void Document::detachRange(Range* range) {
// We don't ASSERT m_ranges.contains(range) to allow us to call this
// unconditionally to fix: https://bugs.webkit.org/show_bug.cgi?id=26044
m_ranges.remove(range);
}
void Document::initDNSPrefetch() {
Settings* settings = this->settings();
m_haveExplicitlyDisabledDNSPrefetch = false;
m_isDNSPrefetchEnabled = settings && settings->getDNSPrefetchingEnabled() &&
getSecurityOrigin()->protocol() == "http";
// Inherit DNS prefetch opt-out from parent frame
if (Document* parent = parentDocument()) {
if (!parent->isDNSPrefetchEnabled())
m_isDNSPrefetchEnabled = false;
}
}
void Document::parseDNSPrefetchControlHeader(const String& dnsPrefetchControl) {
if (equalIgnoringCase(dnsPrefetchControl, "on") &&
!m_haveExplicitlyDisabledDNSPrefetch) {
m_isDNSPrefetchEnabled = true;
return;
}
m_isDNSPrefetchEnabled = false;
m_haveExplicitlyDisabledDNSPrefetch = true;
}
IntersectionObserverController* Document::intersectionObserverController() {
return m_intersectionObserverController;
}
IntersectionObserverController&
Document::ensureIntersectionObserverController() {
if (!m_intersectionObserverController)
m_intersectionObserverController =
IntersectionObserverController::create(this);
return *m_intersectionObserverController;
}
ResizeObserverController& Document::ensureResizeObserverController() {
if (!m_resizeObserverController)
m_resizeObserverController = new ResizeObserverController();
return *m_resizeObserverController;
}
static void runAddConsoleMessageTask(MessageSource source,
MessageLevel level,
const String& message,
ExecutionContext* context) {
context->addConsoleMessage(ConsoleMessage::create(source, level, message));
}
void Document::addConsoleMessage(ConsoleMessage* consoleMessage) {
if (!isContextThread()) {
postTask(TaskType::Unthrottled, BLINK_FROM_HERE,
createCrossThreadTask(
&runAddConsoleMessageTask, consoleMessage->source(),
consoleMessage->level(), consoleMessage->message()));
return;
}
if (!m_frame)
return;
if (consoleMessage->location()->isUnknown()) {
// TODO(dgozman): capture correct location at call places instead.
unsigned lineNumber = 0;
if (!isInDocumentWrite() && scriptableDocumentParser()) {
ScriptableDocumentParser* parser = scriptableDocumentParser();
if (parser->isParsingAtLineNumber())
lineNumber = parser->lineNumber().oneBasedInt();
}
consoleMessage = ConsoleMessage::create(
consoleMessage->source(), consoleMessage->level(),
consoleMessage->message(),
SourceLocation::create(url().getString(), lineNumber, 0, nullptr));
}
m_frame->console().addMessage(consoleMessage);
}
void Document::postTask(TaskType taskType,
const WebTraceLocation& location,
std::unique_ptr<ExecutionContextTask> task,
const String& taskNameForInstrumentation) {
if (!taskNameForInstrumentation.isEmpty()) {
InspectorInstrumentation::asyncTaskScheduled(
this, taskNameForInstrumentation, task.get());
}
TaskRunnerHelper::get(taskType, this)
->postTask(location,
crossThreadBind(&Document::runExecutionContextTask,
wrapCrossThreadWeakPersistent(this),
WTF::passed(std::move(task)),
!taskNameForInstrumentation.isEmpty()));
}
void Document::tasksWereSuspended() {
scriptRunner()->suspend();
if (m_parser)
m_parser->suspendScheduledTasks();
if (m_scriptedAnimationController)
m_scriptedAnimationController->suspend();
}
void Document::tasksWereResumed() {
scriptRunner()->resume();
if (m_parser)
m_parser->resumeScheduledTasks();
if (m_scriptedAnimationController)
m_scriptedAnimationController->resume();
MutationObserver::resumeSuspendedObservers();
if (m_domWindow)
DOMWindowPerformance::performance(*m_domWindow)->resumeSuspendedObservers();
}
bool Document::tasksNeedSuspension() {
Page* page = this->page();
return page && page->suspended();
}
void Document::addToTopLayer(Element* element, const Element* before) {
if (element->isInTopLayer())
return;
DCHECK(!m_topLayerElements.contains(element));
DCHECK(!before || m_topLayerElements.contains(before));
if (before) {
size_t beforePosition = m_topLayerElements.find(before);
m_topLayerElements.insert(beforePosition, element);
} else {
m_topLayerElements.push_back(element);
}
element->setIsInTopLayer(true);
}
void Document::removeFromTopLayer(Element* element) {
if (!element->isInTopLayer())
return;
size_t position = m_topLayerElements.find(element);
DCHECK_NE(position, kNotFound);
m_topLayerElements.remove(position);
element->setIsInTopLayer(false);
}
HTMLDialogElement* Document::activeModalDialog() const {
if (m_topLayerElements.isEmpty())
return 0;
return toHTMLDialogElement(m_topLayerElements.back().get());
}
void Document::exitPointerLock() {
if (!page())
return;
if (Element* target = page()->pointerLockController().element()) {
if (target->document() != this)
return;
page()->pointerLockController().requestPointerUnlock();
}
}
Element* Document::pointerLockElement() const {
if (!page() || page()->pointerLockController().lockPending())
return 0;
if (Element* element = page()->pointerLockController().element()) {
if (element->document() == this)
return element;
}
return 0;
}
void Document::suppressLoadEvent() {
if (!loadEventFinished())
m_loadEventProgress = LoadEventCompleted;
}
void Document::decrementLoadEventDelayCount() {
DCHECK(m_loadEventDelayCount);
--m_loadEventDelayCount;
if (!m_loadEventDelayCount)
checkLoadEventSoon();
}
void Document::checkLoadEventSoon() {
if (frame() && !m_loadEventDelayTimer.isActive())
m_loadEventDelayTimer.startOneShot(0, BLINK_FROM_HERE);
}
bool Document::isDelayingLoadEvent() {
// Always delay load events until after garbage collection.
// This way we don't have to explicitly delay load events via
// incrementLoadEventDelayCount and decrementLoadEventDelayCount in
// Node destructors.
if (ThreadState::current()->sweepForbidden()) {
if (!m_loadEventDelayCount)
checkLoadEventSoon();
return true;
}
return m_loadEventDelayCount;
}
void Document::loadEventDelayTimerFired(TimerBase*) {
if (frame())
frame()->loader().checkCompleted();
}
void Document::loadPluginsSoon() {
// FIXME: Remove this timer once we don't need to compute layout to load
// plugins.
if (!m_pluginLoadingTimer.isActive())
m_pluginLoadingTimer.startOneShot(0, BLINK_FROM_HERE);
}
void Document::pluginLoadingTimerFired(TimerBase*) {
updateStyleAndLayout();
}
ScriptedAnimationController& Document::ensureScriptedAnimationController() {
if (!m_scriptedAnimationController) {
m_scriptedAnimationController = ScriptedAnimationController::create(this);
// We need to make sure that we don't start up the animation controller on a
// background tab, for example.
if (!page())
m_scriptedAnimationController->suspend();
}
return *m_scriptedAnimationController;
}
int Document::requestAnimationFrame(FrameRequestCallback* callback) {
return ensureScriptedAnimationController().registerCallback(callback);
}
void Document::cancelAnimationFrame(int id) {
if (!m_scriptedAnimationController)
return;
m_scriptedAnimationController->cancelCallback(id);
}
void Document::serviceScriptedAnimations(double monotonicAnimationStartTime) {
if (!m_scriptedAnimationController)
return;
m_scriptedAnimationController->serviceScriptedAnimations(
monotonicAnimationStartTime);
}
ScriptedIdleTaskController& Document::ensureScriptedIdleTaskController() {
if (!m_scriptedIdleTaskController)
m_scriptedIdleTaskController = ScriptedIdleTaskController::create(this);
return *m_scriptedIdleTaskController;
}
int Document::requestIdleCallback(IdleRequestCallback* callback,
const IdleRequestOptions& options) {
return ensureScriptedIdleTaskController().registerCallback(callback, options);
}
void Document::cancelIdleCallback(int id) {
if (!m_scriptedIdleTaskController)
return;
m_scriptedIdleTaskController->cancelCallback(id);
}
Touch* Document::createTouch(DOMWindow* window,
EventTarget* target,
int identifier,
double pageX,
double pageY,
double screenX,
double screenY,
double radiusX,
double radiusY,
float rotationAngle,
float force) const {
// Match behavior from when these types were integers, and avoid surprises
// from someone explicitly
// passing Infinity/NaN.
if (!std::isfinite(pageX))
pageX = 0;
if (!std::isfinite(pageY))
pageY = 0;
if (!std::isfinite(screenX))
screenX = 0;
if (!std::isfinite(screenY))
screenY = 0;
if (!std::isfinite(radiusX))
radiusX = 0;
if (!std::isfinite(radiusY))
radiusY = 0;
if (!std::isfinite(rotationAngle))
rotationAngle = 0;
if (!std::isfinite(force))
force = 0;
if (radiusX || radiusY || rotationAngle || force)
UseCounter::count(*this,
UseCounter::DocumentCreateTouchMoreThanSevenArguments);
// FIXME: It's not clear from the documentation at
// http://developer.apple.com/library/safari/#documentation/UserExperience/Reference/DocumentAdditionsReference/DocumentAdditions/DocumentAdditions.html
// 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 and
// implement them here. See https://bugs.webkit.org/show_bug.cgi?id=47819
LocalFrame* frame = window && window->isLocalDOMWindow()
? blink::toLocalDOMWindow(window)->frame()
: this->frame();
return Touch::create(frame, target, identifier, FloatPoint(screenX, screenY),
FloatPoint(pageX, pageY), FloatSize(radiusX, radiusY),
rotationAngle, force, String());
}
TouchList* Document::createTouchList(HeapVector<Member<Touch>>& touches) const {
return TouchList::adopt(touches);
}
DocumentLoader* Document::loader() const {
if (!m_frame)
return 0;
DocumentLoader* loader = m_frame->loader().documentLoader();
if (!loader)
return 0;
if (m_frame->document() != this)
return 0;
return loader;
}
Node* eventTargetNodeForDocument(Document* doc) {
if (!doc)
return 0;
Node* node = doc->focusedElement();
if (!node && doc->isPluginDocument()) {
PluginDocument* pluginDocument = toPluginDocument(doc);
node = pluginDocument->pluginNode();
}
if (!node && doc->isHTMLDocument())
node = doc->body();
if (!node)
node = doc->documentElement();
return node;
}
void Document::adjustFloatQuadsForScrollAndAbsoluteZoom(
Vector<FloatQuad>& quads,
LayoutObject& layoutObject) {
if (!view())
return;
LayoutRect visibleContentRect(view()->visibleContentRect());
for (size_t i = 0; i < quads.size(); ++i) {
quads[i].move(-FloatSize(visibleContentRect.x().toFloat(),
visibleContentRect.y().toFloat()));
adjustFloatQuadForAbsoluteZoom(quads[i], layoutObject);
}
}
void Document::adjustFloatRectForScrollAndAbsoluteZoom(
FloatRect& rect,
LayoutObject& layoutObject) {
if (!view())
return;
LayoutRect visibleContentRect(view()->visibleContentRect());
rect.move(-FloatSize(visibleContentRect.x().toFloat(),
visibleContentRect.y().toFloat()));
adjustFloatRectForAbsoluteZoom(rect, layoutObject);
}
void Document::setThreadedParsingEnabledForTesting(bool enabled) {
s_threadedParsingEnabledForTesting = enabled;
}
bool Document::threadedParsingEnabledForTesting() {
return s_threadedParsingEnabledForTesting;
}
SnapCoordinator* Document::snapCoordinator() {
if (RuntimeEnabledFeatures::cssScrollSnapPointsEnabled() &&
!m_snapCoordinator)
m_snapCoordinator = SnapCoordinator::create();
return m_snapCoordinator.get();
}
void Document::setContextFeatures(ContextFeatures& features) {
m_contextFeatures = &features;
}
static LayoutObject* nearestCommonHoverAncestor(LayoutObject* obj1,
LayoutObject* obj2) {
if (!obj1 || !obj2)
return 0;
for (LayoutObject* currObj1 = obj1; currObj1;
currObj1 = currObj1->hoverAncestor()) {
for (LayoutObject* currObj2 = obj2; currObj2;
currObj2 = currObj2->hoverAncestor()) {
if (currObj1 == currObj2)
return currObj1;
}
}
return 0;
}
void Document::updateHoverActiveState(const HitTestRequest& request,
Element* innerElement,
Scrollbar* hitScrollbar) {
DCHECK(!request.readOnly());
// Only cancel hover state when hitting native scrollbar because custom
// scrollbar's style depends on the owner element's hover state.
bool hitNativeScrollbar = hitScrollbar && !hitScrollbar->isCustomScrollbar();
if (request.active() && m_frame && !hitNativeScrollbar)
m_frame->eventHandler().notifyElementActivated();
Element* innerElementInDocument = hitNativeScrollbar ? nullptr : innerElement;
while (innerElementInDocument && innerElementInDocument->document() != this) {
innerElementInDocument->document().updateHoverActiveState(
request, innerElementInDocument, hitScrollbar);
innerElementInDocument = innerElementInDocument->document().localOwner();
}
updateDistribution();
Element* oldActiveElement = activeHoverElement();
if (oldActiveElement && (!request.active() || hitNativeScrollbar)) {
// The oldActiveElement layoutObject is null, dropped on :active by setting
// display: none, for instance. We still need to clear the ActiveChain as
// the mouse is released.
for (Node* node = oldActiveElement; node;
node = FlatTreeTraversal::parent(*node)) {
DCHECK(!node->isTextNode());
node->setActive(false);
m_userActionElements.setInActiveChain(node, false);
}
setActiveHoverElement(nullptr);
} else {
Element* newActiveElement = innerElementInDocument;
if (!oldActiveElement && newActiveElement &&
!newActiveElement->isDisabledFormControl() && request.active() &&
!request.touchMove()) {
// We are setting the :active chain and freezing it. If future moves
// happen, they will need to reference this chain.
for (Node* node = newActiveElement; node;
node = FlatTreeTraversal::parent(*node)) {
DCHECK(!node->isTextNode());
m_userActionElements.setInActiveChain(node, true);
}
setActiveHoverElement(newActiveElement);
}
}
// If the mouse has just been pressed, set :active on the chain. Those (and
// only those) nodes should remain :active until the mouse is released.
bool allowActiveChanges = !oldActiveElement && activeHoverElement();
// If the mouse is down and if this is a mouse move event, we want to restrict
// changes in :hover/:active to only apply to elements that are in the :active
// chain that we froze at the time the mouse went down.
bool mustBeInActiveChain = request.active() && request.move();
Node* oldHoverNode = hoverNode();
// Check to see if the hovered node has changed.
// If it hasn't, we do not need to do anything.
Node* newHoverNode = innerElementInDocument;
while (newHoverNode && !newHoverNode->layoutObject())
newHoverNode = newHoverNode->parentOrShadowHostNode();
// Update our current hover node.
setHoverNode(newHoverNode);
// We have two different objects. Fetch their layoutObjects.
LayoutObject* oldHoverObj =
oldHoverNode ? oldHoverNode->layoutObject() : nullptr;
LayoutObject* newHoverObj =
newHoverNode ? newHoverNode->layoutObject() : nullptr;
// Locate the common ancestor layout object for the two layoutObjects.
LayoutObject* ancestor = nearestCommonHoverAncestor(oldHoverObj, newHoverObj);
Node* ancestorNode(ancestor ? ancestor->node() : nullptr);
HeapVector<Member<Node>, 32> nodesToRemoveFromChain;
HeapVector<Member<Node>, 32> nodesToAddToChain;
if (oldHoverObj != newHoverObj) {
// If the old hovered node is not nil but it's layoutObject is, it was
// probably detached as part of the :hover style (for instance by setting
// display:none in the :hover pseudo-class). In this case, the old hovered
// element (and its ancestors) must be updated, to ensure it's normal style
// is re-applied.
if (oldHoverNode && !oldHoverObj) {
for (Node& node : NodeTraversal::inclusiveAncestorsOf(*oldHoverNode)) {
if (!mustBeInActiveChain ||
(node.isElementNode() && toElement(node).inActiveChain()))
nodesToRemoveFromChain.push_back(node);
}
}
// The old hover path only needs to be cleared up to (and not including) the
// common ancestor;
for (LayoutObject* curr = oldHoverObj; curr && curr != ancestor;
curr = curr->hoverAncestor()) {
if (curr->node() && !curr->isText() &&
(!mustBeInActiveChain || curr->node()->inActiveChain()))
nodesToRemoveFromChain.push_back(curr->node());
}
// TODO(mustaq): The two loops above may push a single node twice into
// nodesToRemoveFromChain. There must be a better way.
}
// Now set the hover state for our new object up to the root.
for (LayoutObject* curr = newHoverObj; curr; curr = curr->hoverAncestor()) {
if (curr->node() && !curr->isText() &&
(!mustBeInActiveChain || curr->node()->inActiveChain()))
nodesToAddToChain.push_back(curr->node());
}
size_t removeCount = nodesToRemoveFromChain.size();
for (size_t i = 0; i < removeCount; ++i) {
nodesToRemoveFromChain[i]->setHovered(false);
}
bool sawCommonAncestor = false;
size_t addCount = nodesToAddToChain.size();
for (size_t i = 0; i < addCount; ++i) {
// Elements past the common ancestor do not change hover state, but might
// change active state.
if (ancestorNode && nodesToAddToChain[i] == ancestorNode)
sawCommonAncestor = true;
if (allowActiveChanges)
nodesToAddToChain[i]->setActive(true);
if (!sawCommonAncestor || nodesToAddToChain[i] == m_hoverNode) {
nodesToAddToChain[i]->setHovered(true);
}
}
}
bool Document::haveScriptBlockingStylesheetsLoaded() const {
return m_styleEngine->haveScriptBlockingStylesheetsLoaded();
}
bool Document::haveRenderBlockingStylesheetsLoaded() const {
if (RuntimeEnabledFeatures::cssInBodyDoesNotBlockPaintEnabled())
return m_styleEngine->haveRenderBlockingStylesheetsLoaded();
return m_styleEngine->haveScriptBlockingStylesheetsLoaded();
}
Locale& Document::getCachedLocale(const AtomicString& locale) {
AtomicString localeKey = locale;
if (locale.isEmpty() ||
!RuntimeEnabledFeatures::langAttributeAwareFormControlUIEnabled())
return Locale::defaultLocale();
LocaleIdentifierToLocaleMap::AddResult result =
m_localeCache.add(localeKey, nullptr);
if (result.isNewEntry)
result.storedValue->value = Locale::create(localeKey);
return *(result.storedValue->value);
}
AnimationClock& Document::animationClock() {
DCHECK(page());
return page()->animator().clock();
}
Document& Document::ensureTemplateDocument() {
if (isTemplateDocument())
return *this;
if (m_templateDocument)
return *m_templateDocument;
if (isHTMLDocument()) {
DocumentInit init = DocumentInit::fromContext(contextDocument(), blankURL())
.withNewRegistrationContext();
m_templateDocument = HTMLDocument::create(init);
} else {
m_templateDocument = Document::create(DocumentInit(blankURL()));
}
m_templateDocument->m_templateDocumentHost = this; // balanced in dtor.
return *m_templateDocument.get();
}
void Document::didAssociateFormControl(Element* element) {
if (!frame() || !frame()->page() || !loadEventFinished())
return;
// We add a slight delay because this could be called rapidly.
if (!m_didAssociateFormControlsTimer.isActive())
m_didAssociateFormControlsTimer.startOneShot(0.3, BLINK_FROM_HERE);
}
void Document::didAssociateFormControlsTimerFired(TimerBase* timer) {
DCHECK_EQ(timer, &m_didAssociateFormControlsTimer);
if (!frame() || !frame()->page())
return;
frame()->page()->chromeClient().didAssociateFormControlsAfterLoad(frame());
}
float Document::devicePixelRatio() const {
return m_frame ? m_frame->devicePixelRatio() : 1.0;
}
TextAutosizer* Document::textAutosizer() {
if (!m_textAutosizer)
m_textAutosizer = TextAutosizer::create(this);
return m_textAutosizer.get();
}
void Document::setAutofocusElement(Element* element) {
if (!element) {
m_autofocusElement = nullptr;
return;
}
if (m_hasAutofocused)
return;
m_hasAutofocused = true;
DCHECK(!m_autofocusElement);
m_autofocusElement = element;
postTask(TaskType::UserInteraction, BLINK_FROM_HERE,
createSameThreadTask(&runAutofocusTask));
}
Element* Document::activeElement() const {
if (Element* element = adjustedFocusedElement())
return element;
return body();
}
bool Document::hasFocus() const {
return page() && page()->focusController().isDocumentFocused(*this);
}
template <unsigned type>
bool shouldInvalidateNodeListCachesForAttr(
const HeapHashSet<WeakMember<const LiveNodeListBase>> nodeLists[],
const QualifiedName& attrName) {
if (!nodeLists[type].isEmpty() &&
LiveNodeListBase::shouldInvalidateTypeOnAttributeChange(
static_cast<NodeListInvalidationType>(type), attrName))
return true;
return shouldInvalidateNodeListCachesForAttr<type + 1>(nodeLists, attrName);
}
template <>
bool shouldInvalidateNodeListCachesForAttr<numNodeListInvalidationTypes>(
const HeapHashSet<WeakMember<const LiveNodeListBase>>[],
const QualifiedName&) {
return false;
}
bool Document::shouldInvalidateNodeListCaches(
const QualifiedName* attrName) const {
if (attrName) {
return shouldInvalidateNodeListCachesForAttr<
DoNotInvalidateOnAttributeChanges + 1>(m_nodeLists, *attrName);
}
for (int type = 0; type < numNodeListInvalidationTypes; ++type) {
if (!m_nodeLists[type].isEmpty())
return true;
}
return false;
}
void Document::invalidateNodeListCaches(const QualifiedName* attrName) {
for (const LiveNodeListBase* list : m_listsInvalidatedAtDocument)
list->invalidateCacheForAttribute(attrName);
}
void Document::platformColorsChanged() {
if (!isActive())
return;
styleEngine().platformColorsChanged();
}
bool Document::isSecureContext(
String& errorMessage,
const SecureContextCheck privilegeContextCheck) const {
if (!isSecureContext(privilegeContextCheck)) {
errorMessage = SecurityOrigin::isPotentiallyTrustworthyErrorMessage();
return false;
}
return true;
}
bool Document::isSecureContext(
const SecureContextCheck privilegeContextCheck) const {
bool isSecure = isSecureContextImpl(privilegeContextCheck);
if (getSandboxFlags() != SandboxNone) {
UseCounter::count(
*this, isSecure
? UseCounter::SecureContextCheckForSandboxedOriginPassed
: UseCounter::SecureContextCheckForSandboxedOriginFailed);
}
UseCounter::count(*this, isSecure ? UseCounter::SecureContextCheckPassed
: UseCounter::SecureContextCheckFailed);
return isSecure;
}
void Document::enforceInsecureRequestPolicy(WebInsecureRequestPolicy policy) {
// Combine the new policy with the existing policy, as a base policy may be
// inherited from a remote parent before this page's policy is set. In other
// words, insecure requests should be upgraded or blocked if _either_ the
// existing policy or the newly enforced policy triggers upgrades or
// blockage.
setInsecureRequestPolicy(getInsecureRequestPolicy() | policy);
if (frame())
frame()->loader().client()->didEnforceInsecureRequestPolicy(
getInsecureRequestPolicy());
}
void Document::setShadowCascadeOrder(ShadowCascadeOrder order) {
DCHECK_NE(order, ShadowCascadeOrder::ShadowCascadeNone);
if (order == m_shadowCascadeOrder)
return;
if (order == ShadowCascadeOrder::ShadowCascadeV0) {
m_mayContainV0Shadow = true;
if (m_shadowCascadeOrder == ShadowCascadeOrder::ShadowCascadeV1)
UseCounter::count(*this, UseCounter::MixedShadowRootV0AndV1);
}
// For V0 -> V1 upgrade, we need style recalculation for the whole document.
if (m_shadowCascadeOrder == ShadowCascadeOrder::ShadowCascadeV0 &&
order == ShadowCascadeOrder::ShadowCascadeV1) {
this->setNeedsStyleRecalc(
SubtreeStyleChange,
StyleChangeReasonForTracing::create(StyleChangeReason::Shadow));
UseCounter::count(*this, UseCounter::MixedShadowRootV0AndV1);
}
if (order > m_shadowCascadeOrder)
m_shadowCascadeOrder = order;
}
LayoutViewItem Document::layoutViewItem() const {
return LayoutViewItem(m_layoutView);
}
PropertyRegistry* Document::propertyRegistry() {
// TODO(timloh): When the flag is removed, return a reference instead.
if (!m_propertyRegistry && RuntimeEnabledFeatures::cssVariables2Enabled())
m_propertyRegistry = PropertyRegistry::create();
return m_propertyRegistry;
}
const PropertyRegistry* Document::propertyRegistry() const {
return const_cast<Document*>(this)->propertyRegistry();
}
void Document::incrementPasswordCount() {
++m_passwordCount;
if (isSecureContext() || m_passwordCount != 1) {
// The browser process only cares about passwords on pages where the
// top-level URL is not secure. Secure contexts must have a top-level
// URL that is secure, so there is no need to send notifications for
// password fields in secure contexts.
//
// Also, only send a message on the first visible password field; the
// browser process doesn't care about the presence of additional
// password fields beyond that.
return;
}
sendSensitiveInputVisibility();
}
void Document::decrementPasswordCount() {
DCHECK_GT(m_passwordCount, 0u);
--m_passwordCount;
if (isSecureContext() || m_passwordCount > 0)
return;
sendSensitiveInputVisibility();
}
DEFINE_TRACE(Document) {
visitor->trace(m_importsController);
visitor->trace(m_docType);
visitor->trace(m_implementation);
visitor->trace(m_autofocusElement);
visitor->trace(m_focusedElement);
visitor->trace(m_sequentialFocusNavigationStartingPoint);
visitor->trace(m_hoverNode);
visitor->trace(m_activeHoverElement);
visitor->trace(m_documentElement);
visitor->trace(m_rootScrollerController);
visitor->trace(m_titleElement);
visitor->trace(m_axObjectCache);
visitor->trace(m_markers);
visitor->trace(m_cssTarget);
visitor->trace(m_currentScriptStack);
visitor->trace(m_scriptRunner);
visitor->trace(m_listsInvalidatedAtDocument);
for (int i = 0; i < numNodeListInvalidationTypes; ++i)
visitor->trace(m_nodeLists[i]);
visitor->trace(m_topLayerElements);
visitor->trace(m_elemSheet);
visitor->trace(m_nodeIterators);
visitor->trace(m_ranges);
visitor->trace(m_styleEngine);
visitor->trace(m_formController);
visitor->trace(m_visitedLinkState);
visitor->trace(m_frame);
visitor->trace(m_domWindow);
visitor->trace(m_fetcher);
visitor->trace(m_parser);
visitor->trace(m_contextFeatures);
visitor->trace(m_styleSheetList);
visitor->trace(m_documentTiming);
visitor->trace(m_mediaQueryMatcher);
visitor->trace(m_scriptedAnimationController);
visitor->trace(m_scriptedIdleTaskController);
visitor->trace(m_textAutosizer);
visitor->trace(m_registrationContext);
visitor->trace(m_customElementMicrotaskRunQueue);
visitor->trace(m_elementDataCache);
visitor->trace(m_useElementsNeedingUpdate);
visitor->trace(m_timers);
visitor->trace(m_templateDocument);
visitor->trace(m_templateDocumentHost);
visitor->trace(m_userActionElements);
visitor->trace(m_svgExtensions);
visitor->trace(m_timeline);
visitor->trace(m_compositorPendingAnimations);
visitor->trace(m_contextDocument);
visitor->trace(m_canvasFontCache);
visitor->trace(m_intersectionObserverController);
visitor->trace(m_snapCoordinator);
visitor->trace(m_resizeObserverController);
visitor->trace(m_propertyRegistry);
visitor->trace(m_styleReattachDataMap);
Supplementable<Document>::trace(visitor);
TreeScope::trace(visitor);
ContainerNode::trace(visitor);
ExecutionContext::trace(visitor);
SecurityContext::trace(visitor);
SynchronousMutationNotifier::trace(visitor);
}
void Document::maybeRecordLoadReason(WouldLoadReason reason) {
DCHECK(m_wouldLoadReason == Created || reason != Created);
DCHECK(frame());
if (m_wouldLoadReason == Created && frame()->isCrossOriginSubframe() &&
frame()->loader().stateMachine()->committedFirstRealDocumentLoad()) {
recordLoadReasonToHistogram(reason);
}
m_wouldLoadReason = reason;
}
DEFINE_TRACE_WRAPPERS(Document) {
visitor->traceWrappers(m_importsController);
visitor->traceWrappers(m_implementation);
visitor->traceWrappers(m_styleSheetList);
visitor->traceWrappers(m_styleEngine);
for (int i = 0; i < numNodeListInvalidationTypes; ++i) {
for (auto list : m_nodeLists[i]) {
if (isHTMLCollectionType(list->type())) {
visitor->traceWrappersWithManualWriteBarrier(
static_cast<const HTMLCollection*>(list.get()));
} else {
visitor->traceWrappersWithManualWriteBarrier(
static_cast<const LiveNodeList*>(list.get()));
}
}
}
// Cannot trace in Supplementable<Document> as it is part of platform/ and
// thus cannot refer to ScriptWrappableVisitor.
visitor->traceWrappers(
static_cast<FontFaceSet*>(Supplementable<Document>::m_supplements.get(
FontFaceSet::supplementName())));
ContainerNode::traceWrappers(visitor);
}
template class CORE_TEMPLATE_EXPORT Supplement<Document>;
} // namespace blink
#ifndef NDEBUG
using namespace blink;
static WeakDocumentSet& liveDocumentSet() {
DEFINE_STATIC_LOCAL(WeakDocumentSet, set, ());
return set;
}
void showLiveDocumentInstances() {
WeakDocumentSet& set = liveDocumentSet();
fprintf(stderr, "There are %u documents currently alive:\n", set.size());
for (Document* document : set)
fprintf(stderr, "- Document %p URL: %s\n", document,
document->url().getString().utf8().data());
}
#endif