| /* |
| * 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) 2004-2009, 2011-2012, 2015-2017 Apple Inc. All rights reserved. |
| * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) |
| * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved. |
| * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) |
| * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "StyleScope.h" |
| |
| #include "CSSFontSelector.h" |
| #include "CSSStyleSheet.h" |
| #include "Element.h" |
| #include "ElementChildIterator.h" |
| #include "ExtensionStyleSheets.h" |
| #include "HTMLHeadElement.h" |
| #include "HTMLIFrameElement.h" |
| #include "HTMLLinkElement.h" |
| #include "HTMLSlotElement.h" |
| #include "HTMLStyleElement.h" |
| #include "InspectorInstrumentation.h" |
| #include "Logging.h" |
| #include "ProcessingInstruction.h" |
| #include "SVGElementTypeHelpers.h" |
| #include "SVGStyleElement.h" |
| #include "Settings.h" |
| #include "ShadowRoot.h" |
| #include "StyleInvalidator.h" |
| #include "StyleResolver.h" |
| #include "StyleSheetContents.h" |
| #include "StyleSheetList.h" |
| #include "UserContentController.h" |
| #include "UserContentURLPattern.h" |
| #include "UserStyleSheet.h" |
| #include <wtf/SetForScope.h> |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| namespace Style { |
| |
| Scope::Scope(Document& document) |
| : m_document(document) |
| , m_pendingUpdateTimer(*this, &Scope::pendingUpdateTimerFired) |
| { |
| } |
| |
| Scope::Scope(ShadowRoot& shadowRoot) |
| : m_document(shadowRoot.documentScope()) |
| , m_shadowRoot(&shadowRoot) |
| , m_pendingUpdateTimer(*this, &Scope::pendingUpdateTimerFired) |
| { |
| } |
| |
| Scope::~Scope() |
| { |
| ASSERT(!hasPendingSheets()); |
| } |
| |
| Resolver& Scope::resolver() |
| { |
| if (!m_resolver) { |
| if (m_shadowRoot) |
| createOrFindSharedShadowTreeResolver(); |
| else |
| createDocumentResolver(); |
| } |
| return *m_resolver; |
| } |
| |
| void Scope::createDocumentResolver() |
| { |
| ASSERT(!m_resolver); |
| ASSERT(!m_shadowRoot); |
| |
| SetForScope<bool> isUpdatingStyleResolver { m_isUpdatingStyleResolver, true }; |
| |
| m_resolver = Resolver::create(m_document); |
| |
| m_document.fontSelector().buildStarted(); |
| |
| m_resolver->ruleSets().initializeUserStyle(); |
| m_resolver->addCurrentSVGFontFaceRules(); |
| m_resolver->appendAuthorStyleSheets(m_activeStyleSheets); |
| |
| m_document.fontSelector().buildCompleted(); |
| } |
| |
| void Scope::createOrFindSharedShadowTreeResolver() |
| { |
| ASSERT(!m_resolver); |
| ASSERT(m_shadowRoot); |
| |
| auto key = makeResolverSharingKey(); |
| |
| auto result = documentScope().m_sharedShadowTreeResolvers.ensure(WTFMove(key), [&] { |
| SetForScope<bool> isUpdatingStyleResolver { m_isUpdatingStyleResolver, true }; |
| |
| m_resolver = Resolver::create(m_document); |
| |
| m_resolver->ruleSets().setUsesSharedUserStyle(!isForUserAgentShadowTree()); |
| m_resolver->appendAuthorStyleSheets(m_activeStyleSheets); |
| |
| return Ref { *m_resolver }; |
| }); |
| |
| if (!result.isNewEntry) { |
| m_resolver = result.iterator->value.ptr(); |
| m_resolver->setSharedBetweenShadowTrees(); |
| } |
| } |
| |
| void Scope::unshareShadowTreeResolverBeforeMutation() |
| { |
| ASSERT(m_shadowRoot); |
| |
| documentScope().m_sharedShadowTreeResolvers.remove(makeResolverSharingKey()); |
| } |
| |
| auto Scope::makeResolverSharingKey() -> ResolverSharingKey |
| { |
| constexpr bool isNonEmptyHashTableValue = true; |
| return { |
| m_activeStyleSheets.map([&](auto& sheet) { return RefPtr { &sheet->contents() }; }), |
| isForUserAgentShadowTree(), |
| isNonEmptyHashTableValue |
| }; |
| } |
| |
| void Scope::clearResolver() |
| { |
| m_resolver = nullptr; |
| } |
| |
| void Scope::releaseMemory() |
| { |
| if (!m_shadowRoot) { |
| for (auto* descendantShadowRoot : m_document.inDocumentShadowRoots()) |
| descendantShadowRoot->styleScope().releaseMemory(); |
| } |
| |
| #if ENABLE(CSS_SELECTOR_JIT) |
| for (auto& sheet : m_activeStyleSheets) { |
| sheet->contents().traverseRules([] (const StyleRuleBase& rule) { |
| if (is<StyleRule>(rule)) |
| downcast<StyleRule>(rule).releaseCompiledSelectors(); |
| return false; |
| }); |
| } |
| #endif |
| clearResolver(); |
| |
| m_sharedShadowTreeResolvers.clear(); |
| } |
| |
| Scope& Scope::forNode(Node& node) |
| { |
| ASSERT(node.isConnected()); |
| auto* shadowRoot = node.containingShadowRoot(); |
| if (shadowRoot) |
| return shadowRoot->styleScope(); |
| return node.document().styleScope(); |
| } |
| |
| Scope* Scope::forOrdinal(Element& element, ScopeOrdinal ordinal) |
| { |
| if (ordinal == ScopeOrdinal::Element) |
| return &forNode(element); |
| if (ordinal == ScopeOrdinal::Shadow) { |
| auto* shadowRoot = element.shadowRoot(); |
| return shadowRoot ? &shadowRoot->styleScope() : nullptr; |
| } |
| if (ordinal <= ScopeOrdinal::ContainingHost) { |
| auto* host = hostForScopeOrdinal(element, ordinal); |
| return host ? &forNode(*host) : nullptr; |
| } |
| auto* slot = assignedSlotForScopeOrdinal(element, ordinal); |
| return slot ? &forNode(*slot) : nullptr; |
| } |
| |
| void Scope::setPreferredStylesheetSetName(const String& name) |
| { |
| if (m_preferredStylesheetSetName == name) |
| return; |
| m_preferredStylesheetSetName = name; |
| didChangeActiveStyleSheetCandidates(); |
| } |
| |
| void Scope::addPendingSheet(const Element& element) |
| { |
| ASSERT(!hasPendingSheet(element)); |
| |
| bool isInHead = ancestorsOfType<HTMLHeadElement>(element).first(); |
| |
| LOG_WITH_STREAM(StyleSheets, stream << "Scope " << this << " addPendingSheet() " << element << " isInHead " << isInHead); |
| |
| if (isInHead) |
| m_elementsInHeadWithPendingSheets.add(&element); |
| else |
| m_elementsInBodyWithPendingSheets.add(&element); |
| } |
| |
| // This method is called whenever a top-level stylesheet has finished loading. |
| void Scope::removePendingSheet(const Element& element) |
| { |
| ASSERT(hasPendingSheet(element)); |
| |
| if (!m_elementsInHeadWithPendingSheets.remove(&element)) |
| m_elementsInBodyWithPendingSheets.remove(&element); |
| |
| didRemovePendingStylesheet(); |
| } |
| |
| void Scope::addPendingSheet(const ProcessingInstruction& processingInstruction) |
| { |
| ASSERT(!m_processingInstructionsWithPendingSheets.contains(&processingInstruction)); |
| |
| m_processingInstructionsWithPendingSheets.add(&processingInstruction); |
| } |
| |
| void Scope::removePendingSheet(const ProcessingInstruction& processingInstruction) |
| { |
| ASSERT(m_processingInstructionsWithPendingSheets.contains(&processingInstruction)); |
| |
| m_processingInstructionsWithPendingSheets.remove(&processingInstruction); |
| |
| didRemovePendingStylesheet(); |
| } |
| |
| void Scope::didRemovePendingStylesheet() |
| { |
| if (hasPendingSheets()) |
| return; |
| |
| didChangeActiveStyleSheetCandidates(); |
| |
| if (!m_shadowRoot) |
| m_document.didRemoveAllPendingStylesheet(); |
| } |
| |
| bool Scope::hasPendingSheet(const Element& element) const |
| { |
| return m_elementsInHeadWithPendingSheets.contains(&element) || hasPendingSheetInBody(element); |
| } |
| |
| bool Scope::hasPendingSheetInBody(const Element& element) const |
| { |
| return m_elementsInBodyWithPendingSheets.contains(&element); |
| } |
| |
| bool Scope::hasPendingSheet(const ProcessingInstruction& processingInstruction) const |
| { |
| return m_processingInstructionsWithPendingSheets.contains(&processingInstruction); |
| } |
| |
| void Scope::addStyleSheetCandidateNode(Node& node, bool createdByParser) |
| { |
| if (!node.isConnected()) |
| return; |
| |
| // Until the <body> exists, we have no choice but to compare document positions, |
| // since styles outside of the body and head continue to be shunted into the head |
| // (and thus can shift to end up before dynamically added DOM content that is also |
| // outside the body). |
| if ((createdByParser && m_document.bodyOrFrameset()) || m_styleSheetCandidateNodes.isEmpty()) { |
| m_styleSheetCandidateNodes.add(&node); |
| return; |
| } |
| |
| // Determine an appropriate insertion point. |
| auto begin = m_styleSheetCandidateNodes.begin(); |
| auto end = m_styleSheetCandidateNodes.end(); |
| auto it = end; |
| Node* followingNode = nullptr; |
| do { |
| --it; |
| Node* n = *it; |
| unsigned short position = n->compareDocumentPosition(node); |
| if (position == Node::DOCUMENT_POSITION_FOLLOWING) { |
| m_styleSheetCandidateNodes.insertBefore(followingNode, &node); |
| return; |
| } |
| followingNode = n; |
| } while (it != begin); |
| |
| LOG_WITH_STREAM(StyleSheets, stream << "Scope " << this << " addStyleSheetCandidateNode() " << node); |
| |
| m_styleSheetCandidateNodes.insertBefore(followingNode, &node); |
| } |
| |
| void Scope::removeStyleSheetCandidateNode(Node& node) |
| { |
| if (m_styleSheetCandidateNodes.remove(&node)) |
| didChangeActiveStyleSheetCandidates(); |
| } |
| |
| #if ENABLE(XSLT) |
| // FIXME: <https://webkit.org/b/178830> Remove XSLT relaed code from Style::Scope. |
| Vector<Ref<ProcessingInstruction>> Scope::collectXSLTransforms() |
| { |
| Vector<Ref<ProcessingInstruction>> processingInstructions; |
| for (auto& node : m_styleSheetCandidateNodes) { |
| if (is<ProcessingInstruction>(*node) && downcast<ProcessingInstruction>(*node).isXSL()) |
| processingInstructions.append(downcast<ProcessingInstruction>(*node)); |
| } |
| return processingInstructions; |
| } |
| #endif |
| |
| void Scope::collectActiveStyleSheets(Vector<RefPtr<StyleSheet>>& sheets) |
| { |
| if (!m_document.settings().authorAndUserStylesEnabled()) |
| return; |
| |
| LOG_WITH_STREAM(StyleSheets, stream << "Scope " << this << " collectActiveStyleSheets()"); |
| |
| for (auto& node : m_styleSheetCandidateNodes) { |
| RefPtr<StyleSheet> sheet; |
| if (is<ProcessingInstruction>(*node)) { |
| if (!downcast<ProcessingInstruction>(*node).isCSS()) |
| continue; |
| // We don't support linking to embedded CSS stylesheets, see <https://bugs.webkit.org/show_bug.cgi?id=49281> for discussion. |
| sheet = downcast<ProcessingInstruction>(*node).sheet(); |
| LOG_WITH_STREAM(StyleSheets, stream << " adding sheet " << sheet << " from ProcessingInstruction node " << *node); |
| } else if (is<HTMLLinkElement>(*node) || is<HTMLStyleElement>(*node) || is<SVGStyleElement>(*node)) { |
| Element& element = downcast<Element>(*node); |
| AtomString title = element.isInShadowTree() ? nullAtom() : element.attributeWithoutSynchronization(titleAttr); |
| bool enabledViaScript = false; |
| if (is<HTMLLinkElement>(element)) { |
| // <LINK> element |
| HTMLLinkElement& linkElement = downcast<HTMLLinkElement>(element); |
| if (linkElement.isDisabled()) |
| continue; |
| enabledViaScript = linkElement.isEnabledViaScript(); |
| if (linkElement.styleSheetIsLoading()) { |
| // it is loading but we should still decide which style sheet set to use |
| if (!enabledViaScript && !title.isEmpty() && m_preferredStylesheetSetName.isEmpty()) { |
| if (!linkElement.attributeWithoutSynchronization(relAttr).contains("alternate")) |
| m_preferredStylesheetSetName = title; |
| } |
| continue; |
| } |
| if (!linkElement.sheet()) |
| title = nullAtom(); |
| } |
| // Get the current preferred styleset. This is the |
| // set of sheets that will be enabled. |
| if (is<SVGStyleElement>(element)) |
| sheet = downcast<SVGStyleElement>(element).sheet(); |
| else if (is<HTMLLinkElement>(element)) |
| sheet = downcast<HTMLLinkElement>(element).sheet(); |
| else |
| sheet = downcast<HTMLStyleElement>(element).sheet(); |
| |
| // Check to see if this sheet belongs to a styleset |
| // (thus making it PREFERRED or ALTERNATE rather than |
| // PERSISTENT). |
| auto& rel = element.attributeWithoutSynchronization(relAttr); |
| if (!enabledViaScript && !title.isEmpty()) { |
| // Yes, we have a title. |
| if (m_preferredStylesheetSetName.isEmpty()) { |
| // No preferred set has been established. If |
| // we are NOT an alternate sheet, then establish |
| // us as the preferred set. Otherwise, just ignore |
| // this sheet. |
| if (is<HTMLStyleElement>(element) || !rel.contains("alternate")) |
| m_preferredStylesheetSetName = title; |
| } |
| if (title != m_preferredStylesheetSetName) |
| sheet = nullptr; |
| } |
| |
| if (rel.contains("alternate") && title.isEmpty()) |
| sheet = nullptr; |
| |
| if (sheet) |
| LOG_WITH_STREAM(StyleSheets, stream << " adding sheet " << sheet << " from " << *node); |
| } |
| if (sheet) |
| sheets.append(WTFMove(sheet)); |
| } |
| } |
| |
| Scope::StyleSheetChange Scope::analyzeStyleSheetChange(const Vector<RefPtr<CSSStyleSheet>>& newStylesheets) |
| { |
| unsigned newStylesheetCount = newStylesheets.size(); |
| |
| auto* resolver = resolverIfExists(); |
| if (!resolver) |
| return { ResolverUpdateType::Reconstruct }; |
| |
| if (resolver->isSharedBetweenShadowTrees()) |
| return { ResolverUpdateType::Reconstruct }; |
| |
| // Find out which stylesheets are new. |
| unsigned oldStylesheetCount = m_activeStyleSheets.size(); |
| if (newStylesheetCount < oldStylesheetCount) |
| return { ResolverUpdateType::Reconstruct }; |
| |
| Vector<StyleSheetContents*> addedSheets; |
| unsigned newIndex = 0; |
| for (unsigned oldIndex = 0; oldIndex < oldStylesheetCount; ++oldIndex) { |
| if (newIndex >= newStylesheetCount) |
| return { ResolverUpdateType::Reconstruct }; |
| |
| while (m_activeStyleSheets[oldIndex] != newStylesheets[newIndex]) { |
| addedSheets.append(&newStylesheets[newIndex]->contents()); |
| ++newIndex; |
| if (newIndex == newStylesheetCount) |
| return { ResolverUpdateType::Reconstruct }; |
| } |
| ++newIndex; |
| } |
| bool hasInsertions = !addedSheets.isEmpty(); |
| while (newIndex < newStylesheetCount) { |
| addedSheets.append(&newStylesheets[newIndex]->contents()); |
| ++newIndex; |
| } |
| |
| // If all new sheets were added at the end of the list we can just add them to existing Resolver. |
| // If there were insertions we need to re-add all the stylesheets so rules are ordered correctly. |
| return { hasInsertions ? ResolverUpdateType::Reset : ResolverUpdateType::Additive, WTFMove(addedSheets) }; |
| } |
| |
| static void filterEnabledNonemptyCSSStyleSheets(Vector<RefPtr<CSSStyleSheet>>& result, const Vector<RefPtr<StyleSheet>>& sheets) |
| { |
| for (auto& sheet : sheets) { |
| if (!is<CSSStyleSheet>(*sheet)) |
| continue; |
| CSSStyleSheet& styleSheet = downcast<CSSStyleSheet>(*sheet); |
| if (styleSheet.isLoading()) |
| continue; |
| if (styleSheet.disabled()) |
| continue; |
| if (!styleSheet.length()) |
| continue; |
| result.append(&styleSheet); |
| } |
| } |
| |
| void Scope::updateActiveStyleSheets(UpdateType updateType) |
| { |
| ASSERT(!m_pendingUpdate); |
| |
| if (!m_document.hasLivingRenderTree()) |
| return; |
| |
| if (m_document.inStyleRecalc() || m_document.inRenderTreeUpdate()) { |
| // Protect against deleting style resolver in the middle of a style resolution. |
| // Crash stacks indicate we can get here when a resource load fails synchronously (for example due to content blocking). |
| // FIXME: These kind of cases should be eliminated and this path replaced by an assert. |
| m_pendingUpdate = UpdateType::ContentsOrInterpretation; |
| m_document.scheduleFullStyleRebuild(); |
| return; |
| } |
| |
| Vector<RefPtr<StyleSheet>> activeStyleSheets; |
| collectActiveStyleSheets(activeStyleSheets); |
| |
| Vector<RefPtr<CSSStyleSheet>> activeCSSStyleSheets; |
| |
| if (!isForUserAgentShadowTree()) { |
| activeCSSStyleSheets.appendVector(m_document.extensionStyleSheets().injectedAuthorStyleSheets()); |
| activeCSSStyleSheets.appendVector(m_document.extensionStyleSheets().authorStyleSheetsForTesting()); |
| } |
| |
| filterEnabledNonemptyCSSStyleSheets(activeCSSStyleSheets, activeStyleSheets); |
| |
| LOG_WITH_STREAM(StyleSheets, stream << "Scope::updateActiveStyleSheets for document " << m_document << " sheets " << activeCSSStyleSheets); |
| |
| auto styleSheetChange = StyleSheetChange { ResolverUpdateType::Reconstruct }; |
| if (updateType == UpdateType::ActiveSet) |
| styleSheetChange = analyzeStyleSheetChange(activeCSSStyleSheets); |
| |
| updateResolver(activeCSSStyleSheets, styleSheetChange.resolverUpdateType); |
| |
| m_weakCopyOfActiveStyleSheetListForFastLookup = nullptr; |
| m_activeStyleSheets.swap(activeCSSStyleSheets); |
| m_styleSheetsForStyleSheetList.swap(activeStyleSheets); |
| |
| InspectorInstrumentation::activeStyleSheetsUpdated(m_document); |
| |
| for (const auto& sheet : m_activeStyleSheets) { |
| if (sheet->contents().usesStyleBasedEditability()) |
| m_usesStyleBasedEditability = true; |
| } |
| |
| invalidateStyleAfterStyleSheetChange(styleSheetChange); |
| } |
| |
| void Scope::invalidateStyleAfterStyleSheetChange(const StyleSheetChange& styleSheetChange) |
| { |
| if (m_shadowRoot && !m_shadowRoot->isConnected()) |
| return; |
| |
| // If we are already parsing the body and so may have significant amount of elements, put some effort into trying to avoid style recalcs. |
| bool invalidateAll = !m_document.bodyOrFrameset() || m_document.hasNodesWithNonFinalStyle() || m_document.hasNodesWithMissingStyle(); |
| |
| if (styleSheetChange.resolverUpdateType == ResolverUpdateType::Reconstruct || invalidateAll) { |
| Invalidator::invalidateAllStyle(*this); |
| return; |
| } |
| |
| Invalidator invalidator(styleSheetChange.addedSheets, m_resolver->mediaQueryEvaluator()); |
| invalidator.invalidateStyle(*this); |
| } |
| |
| void Scope::updateResolver(Vector<RefPtr<CSSStyleSheet>>& activeStyleSheets, ResolverUpdateType updateType) |
| { |
| if (updateType == ResolverUpdateType::Reconstruct) { |
| clearResolver(); |
| return; |
| } |
| |
| if (m_shadowRoot) |
| unshareShadowTreeResolverBeforeMutation(); |
| |
| SetForScope<bool> isUpdatingStyleResolver { m_isUpdatingStyleResolver, true }; |
| |
| if (updateType == ResolverUpdateType::Reset) { |
| m_resolver->ruleSets().resetAuthorStyle(); |
| m_resolver->appendAuthorStyleSheets(activeStyleSheets); |
| return; |
| } |
| |
| ASSERT(updateType == ResolverUpdateType::Additive); |
| ASSERT(activeStyleSheets.size() >= m_activeStyleSheets.size()); |
| |
| unsigned firstNewIndex = m_activeStyleSheets.size(); |
| Vector<RefPtr<CSSStyleSheet>> newStyleSheets; |
| newStyleSheets.appendRange(activeStyleSheets.begin() + firstNewIndex, activeStyleSheets.end()); |
| m_resolver->appendAuthorStyleSheets(newStyleSheets); |
| } |
| |
| const Vector<RefPtr<CSSStyleSheet>> Scope::activeStyleSheetsForInspector() |
| { |
| Vector<RefPtr<CSSStyleSheet>> result; |
| |
| if (auto* pageUserSheet = m_document.extensionStyleSheets().pageUserSheet()) |
| result.append(pageUserSheet); |
| result.appendVector(m_document.extensionStyleSheets().documentUserStyleSheets()); |
| result.appendVector(m_document.extensionStyleSheets().injectedUserStyleSheets()); |
| result.appendVector(m_document.extensionStyleSheets().injectedAuthorStyleSheets()); |
| result.appendVector(m_document.extensionStyleSheets().authorStyleSheetsForTesting()); |
| |
| for (auto& styleSheet : m_styleSheetsForStyleSheetList) { |
| if (!is<CSSStyleSheet>(*styleSheet)) |
| continue; |
| |
| CSSStyleSheet& sheet = downcast<CSSStyleSheet>(*styleSheet); |
| if (sheet.disabled()) |
| continue; |
| |
| result.append(&sheet); |
| } |
| |
| return result; |
| } |
| |
| bool Scope::activeStyleSheetsContains(const CSSStyleSheet* sheet) const |
| { |
| if (!m_weakCopyOfActiveStyleSheetListForFastLookup) { |
| m_weakCopyOfActiveStyleSheetListForFastLookup = makeUnique<HashSet<const CSSStyleSheet*>>(); |
| for (auto& activeStyleSheet : m_activeStyleSheets) |
| m_weakCopyOfActiveStyleSheetListForFastLookup->add(activeStyleSheet.get()); |
| } |
| return m_weakCopyOfActiveStyleSheetListForFastLookup->contains(sheet); |
| } |
| |
| void Scope::flushPendingSelfUpdate() |
| { |
| ASSERT(m_pendingUpdate); |
| |
| auto updateType = *m_pendingUpdate; |
| |
| clearPendingUpdate(); |
| |
| updateActiveStyleSheets(updateType); |
| } |
| |
| void Scope::flushPendingDescendantUpdates() |
| { |
| ASSERT(m_hasDescendantWithPendingUpdate); |
| ASSERT(!m_shadowRoot); |
| for (auto* descendantShadowRoot : m_document.inDocumentShadowRoots()) |
| descendantShadowRoot->styleScope().flushPendingUpdate(); |
| m_hasDescendantWithPendingUpdate = false; |
| } |
| |
| void Scope::clearPendingUpdate() |
| { |
| m_pendingUpdateTimer.stop(); |
| m_pendingUpdate = { }; |
| } |
| |
| void Scope::scheduleUpdate(UpdateType update) |
| { |
| if (update == UpdateType::ContentsOrInterpretation) { |
| // :host and ::slotted rules might go away. |
| if (m_shadowRoot) { |
| Invalidator::invalidateHostAndSlottedStyleIfNeeded(*m_shadowRoot); |
| unshareShadowTreeResolverBeforeMutation(); |
| } |
| // FIXME: Animation code may trigger resource load in middle of style recalc and that can add a rule to a content extension stylesheet. |
| // Fix and remove isResolvingTreeStyle() test below, see https://bugs.webkit.org/show_bug.cgi?id=194335 |
| // FIXME: The m_isUpdatingStyleResolver test is here because extension stylesheets can get us here from Resolver::appendAuthorStyleSheets. |
| if (!m_isUpdatingStyleResolver && !m_document.isResolvingTreeStyle()) |
| clearResolver(); |
| } |
| |
| if (!m_pendingUpdate || *m_pendingUpdate < update) { |
| m_pendingUpdate = update; |
| if (m_shadowRoot) |
| documentScope().m_hasDescendantWithPendingUpdate = true; |
| } |
| |
| if (m_pendingUpdateTimer.isActive()) |
| return; |
| m_pendingUpdateTimer.startOneShot(0_s); |
| } |
| |
| void Scope::evaluateMediaQueriesForViewportChange() |
| { |
| auto viewportState = mediaQueryViewportStateForDocument(m_document); |
| |
| if (m_viewportStateOnPreviousMediaQueryEvaluation && *m_viewportStateOnPreviousMediaQueryEvaluation == viewportState) |
| return; |
| // This doesn't need to be invalidated as any changes to the rules will compute their media queries to correct values. |
| m_viewportStateOnPreviousMediaQueryEvaluation = viewportState; |
| |
| evaluateMediaQueries([] (Resolver& resolver) { |
| return resolver.evaluateDynamicMediaQueries(); |
| }); |
| } |
| |
| void Scope::evaluateMediaQueriesForAccessibilitySettingsChange() |
| { |
| evaluateMediaQueries([] (Resolver& resolver) { |
| return resolver.evaluateDynamicMediaQueries(); |
| }); |
| } |
| |
| void Scope::evaluateMediaQueriesForAppearanceChange() |
| { |
| evaluateMediaQueries([] (Resolver& resolver) { |
| return resolver.evaluateDynamicMediaQueries(); |
| }); |
| } |
| |
| auto Scope::collectResolverScopes() -> ResolverScopes |
| { |
| ASSERT(!m_shadowRoot); |
| |
| if (!resolverIfExists()) |
| return { }; |
| |
| ResolverScopes resolverScopes; |
| |
| resolverScopes.add(*resolverIfExists(), Vector<CheckedPtr<Scope>> { this }); |
| |
| for (auto* shadowRoot : m_document.inDocumentShadowRoots()) { |
| auto& scope = shadowRoot->styleScope(); |
| auto* resolver = scope.resolverIfExists(); |
| if (!resolver) |
| continue; |
| resolverScopes.add(*resolver, Vector<CheckedPtr<Scope>> { }).iterator->value.append(&scope); |
| } |
| return resolverScopes; |
| } |
| |
| template <typename TestFunction> |
| void Scope::evaluateMediaQueries(TestFunction&& testFunction) |
| { |
| bool hadChanges = false; |
| |
| auto resolverScopes = collectResolverScopes(); |
| for (auto& [resolver, scopes] : resolverScopes) { |
| auto evaluationChanges = testFunction(resolver.get()); |
| if (!evaluationChanges) |
| continue; |
| hadChanges = true; |
| |
| for (auto& scope : scopes) { |
| switch (evaluationChanges->type) { |
| case DynamicMediaQueryEvaluationChanges::Type::InvalidateStyle: { |
| Invalidator invalidator(evaluationChanges->invalidationRuleSets); |
| invalidator.invalidateStyle(*scope); |
| break; |
| } |
| case DynamicMediaQueryEvaluationChanges::Type::ResetStyle: |
| scope->scheduleUpdate(UpdateType::ContentsOrInterpretation); |
| break; |
| } |
| } |
| } |
| |
| if (hadChanges) |
| InspectorInstrumentation::mediaQueryResultChanged(m_document); |
| } |
| |
| void Scope::didChangeActiveStyleSheetCandidates() |
| { |
| scheduleUpdate(UpdateType::ActiveSet); |
| } |
| |
| void Scope::didChangeStyleSheetContents() |
| { |
| scheduleUpdate(UpdateType::ContentsOrInterpretation); |
| } |
| |
| void Scope::didChangeStyleSheetEnvironment() |
| { |
| if (!m_shadowRoot) { |
| m_sharedShadowTreeResolvers.clear(); |
| |
| for (auto* descendantShadowRoot : m_document.inDocumentShadowRoots()) { |
| // Stylesheets is author shadow roots are potentially affected. |
| if (descendantShadowRoot->mode() != ShadowRootMode::UserAgent) |
| descendantShadowRoot->styleScope().scheduleUpdate(UpdateType::ContentsOrInterpretation); |
| } |
| } |
| scheduleUpdate(UpdateType::ContentsOrInterpretation); |
| } |
| |
| void Scope::invalidateMatchedDeclarationsCache() |
| { |
| if (!m_shadowRoot) { |
| for (auto* descendantShadowRoot : m_document.inDocumentShadowRoots()) |
| descendantShadowRoot->styleScope().invalidateMatchedDeclarationsCache(); |
| } |
| |
| if (auto* resolver = resolverIfExists()) |
| resolver->invalidateMatchedDeclarationsCache(); |
| } |
| |
| void Scope::pendingUpdateTimerFired() |
| { |
| flushPendingUpdate(); |
| } |
| |
| const Vector<RefPtr<StyleSheet>>& Scope::styleSheetsForStyleSheetList() |
| { |
| // FIXME: StyleSheetList content should be updated separately from style resolver updates. |
| flushPendingUpdate(); |
| return m_styleSheetsForStyleSheetList; |
| } |
| |
| Scope& Scope::documentScope() |
| { |
| return m_document.styleScope(); |
| } |
| |
| bool Scope::isForUserAgentShadowTree() const |
| { |
| return m_shadowRoot && m_shadowRoot->mode() == ShadowRootMode::UserAgent; |
| } |
| |
| HTMLSlotElement* assignedSlotForScopeOrdinal(const Element& element, ScopeOrdinal scopeOrdinal) |
| { |
| ASSERT(scopeOrdinal >= ScopeOrdinal::FirstSlot); |
| auto* slot = element.assignedSlot(); |
| for (auto scopeDepth = ScopeOrdinal::FirstSlot; slot && scopeDepth != scopeOrdinal; ++scopeDepth) |
| slot = slot->assignedSlot(); |
| return slot; |
| } |
| |
| Element* hostForScopeOrdinal(const Element& element, ScopeOrdinal scopeOrdinal) |
| { |
| ASSERT(scopeOrdinal <= ScopeOrdinal::ContainingHost); |
| auto* host = element.shadowHost(); |
| for (auto scopeDepth = ScopeOrdinal::ContainingHost; host && scopeDepth != scopeOrdinal; --scopeDepth) |
| host = host->shadowHost(); |
| return host; |
| } |
| |
| } |
| } |
