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android / platform / external / chromium_org / third_party / WebKit / e08f705 / . / Source / core / css / resolver / StyleResolver.cpp
blob: ce9e3cfc4513553a5f4bddba53cd21d55b441c0c [file] [log] [blame]
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
* Copyright (C) 2012 Google Inc. 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 "core/css/resolver/StyleResolver.h"
#include "CSSPropertyNames.h"
#include "HTMLNames.h"
#include "RuntimeEnabledFeatures.h"
#include "StylePropertyShorthand.h"
#include "core/animation/ActiveAnimations.h"
#include "core/animation/AnimatableLength.h"
#include "core/animation/AnimatableValue.h"
#include "core/animation/Animation.h"
#include "core/animation/DocumentTimeline.h"
#include "core/animation/css/CSSAnimatableValueFactory.h"
#include "core/animation/css/CSSAnimations.h"
#include "core/css/CSSCalculationValue.h"
#include "core/css/CSSDefaultStyleSheets.h"
#include "core/css/CSSFontFace.h"
#include "core/css/CSSFontSelector.h"
#include "core/css/CSSKeyframeRule.h"
#include "core/css/CSSKeyframesRule.h"
#include "core/css/CSSParser.h"
#include "core/css/CSSReflectValue.h"
#include "core/css/CSSRuleList.h"
#include "core/css/CSSSelector.h"
#include "core/css/CSSStyleRule.h"
#include "core/css/CSSValueList.h"
#include "core/css/CSSVariableValue.h"
#include "core/css/ElementRuleCollector.h"
#include "core/css/MediaQueryEvaluator.h"
#include "core/css/PageRuleCollector.h"
#include "core/css/StylePropertySet.h"
#include "core/css/StyleRuleImport.h"
#include "core/css/StyleSheetContents.h"
#include "core/css/resolver/AnimatedStyleBuilder.h"
#include "core/css/resolver/MatchResult.h"
#include "core/css/resolver/MediaQueryResult.h"
#include "core/css/resolver/SharedStyleFinder.h"
#include "core/css/resolver/StyleAdjuster.h"
#include "core/css/resolver/StyleResolverStats.h"
#include "core/css/resolver/ViewportStyleResolver.h"
#include "core/dom/CSSSelectorWatch.h"
#include "core/dom/NodeRenderStyle.h"
#include "core/dom/StyleEngine.h"
#include "core/dom/Text.h"
#include "core/dom/shadow/ElementShadow.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/html/HTMLIFrameElement.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/frame/Frame.h"
#include "core/frame/FrameView.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/style/KeyframeList.h"
#include "core/rendering/style/StyleCustomFilterProgramCache.h"
#include "core/svg/SVGDocumentExtensions.h"
#include "core/svg/SVGElement.h"
#include "core/svg/SVGFontFaceElement.h"
#include "wtf/StdLibExtras.h"
using namespace std;
namespace {
using namespace WebCore;
void setAnimationUpdateIfNeeded(StyleResolverState& state, Element& element)
{
// If any changes to CSS Animations were detected, stash the update away for application after the
// render object is updated if we're in the appropriate scope.
if (RuntimeEnabledFeatures::webAnimationsCSSEnabled() && state.animationUpdate())
element.ensureActiveAnimations()->cssAnimations().setPendingUpdate(state.takeAnimationUpdate());
}
} // namespace
namespace WebCore {
using namespace HTMLNames;
RenderStyle* StyleResolver::s_styleNotYetAvailable;
static StylePropertySet* leftToRightDeclaration()
{
DEFINE_STATIC_REF(MutableStylePropertySet, leftToRightDecl, (MutableStylePropertySet::create()));
if (leftToRightDecl->isEmpty())
leftToRightDecl->setProperty(CSSPropertyDirection, CSSValueLtr);
return leftToRightDecl;
}
static StylePropertySet* rightToLeftDeclaration()
{
DEFINE_STATIC_REF(MutableStylePropertySet, rightToLeftDecl, (MutableStylePropertySet::create()));
if (rightToLeftDecl->isEmpty())
rightToLeftDecl->setProperty(CSSPropertyDirection, CSSValueRtl);
return rightToLeftDecl;
}
static void addFontFaceRule(Document* document, CSSFontSelector* cssFontSelector, const StyleRuleFontFace* fontFaceRule)
{
RefPtr<CSSFontFace> cssFontFace = CSSFontFace::createFromStyleRule(document, fontFaceRule);
if (cssFontFace)
cssFontSelector->addFontFaceRule(fontFaceRule, cssFontFace);
}
StyleResolver::StyleResolver(Document& document)
: m_document(document)
, m_viewportStyleResolver(ViewportStyleResolver::create(&document))
, m_needCollectFeatures(false)
, m_styleResourceLoader(document.fetcher())
, m_styleResolverStatsSequence(0)
, m_accessCount(0)
{
// FIXME: Why do this here instead of as part of resolving style on the root?
CSSDefaultStyleSheets::loadDefaultStylesheetIfNecessary();
// Construct document root element default style. This is needed
// to evaluate media queries that contain relative constraints, like "screen and (max-width: 10em)"
// This is here instead of constructor because when constructor is run,
// Document doesn't have documentElement.
// NOTE: This assumes that element that gets passed to the styleForElement call
// is always from the document that owns the StyleResolver.
FrameView* view = document.view();
if (view)
m_medium = adoptPtr(new MediaQueryEvaluator(view->mediaType()));
else
m_medium = adoptPtr(new MediaQueryEvaluator("all"));
Element* root = document.documentElement();
if (root)
m_rootDefaultStyle = styleForElement(root, 0, DisallowStyleSharing, MatchOnlyUserAgentRules);
if (m_rootDefaultStyle && view)
m_medium = adoptPtr(new MediaQueryEvaluator(view->mediaType(), &view->frame(), m_rootDefaultStyle.get()));
m_styleTree.clear();
initWatchedSelectorRules(CSSSelectorWatch::from(document).watchedCallbackSelectors());
#if ENABLE(SVG_FONTS)
if (document.svgExtensions()) {
const HashSet<SVGFontFaceElement*>& svgFontFaceElements = document.svgExtensions()->svgFontFaceElements();
HashSet<SVGFontFaceElement*>::const_iterator end = svgFontFaceElements.end();
for (HashSet<SVGFontFaceElement*>::const_iterator it = svgFontFaceElements.begin(); it != end; ++it)
addFontFaceRule(&document, document.styleEngine()->fontSelector(), (*it)->fontFaceRule());
}
#endif
}
void StyleResolver::initWatchedSelectorRules(const Vector<RefPtr<StyleRule> >& watchedSelectors)
{
if (!watchedSelectors.size())
return;
m_watchedSelectorsRules = RuleSet::create();
for (unsigned i = 0; i < watchedSelectors.size(); ++i)
m_watchedSelectorsRules->addStyleRule(watchedSelectors[i].get(), RuleHasNoSpecialState);
}
void StyleResolver::lazyAppendAuthorStyleSheets(unsigned firstNew, const Vector<RefPtr<CSSStyleSheet> >& styleSheets)
{
unsigned size = styleSheets.size();
for (unsigned i = firstNew; i < size; ++i)
m_pendingStyleSheets.add(styleSheets[i].get());
}
void StyleResolver::removePendingAuthorStyleSheets(const Vector<RefPtr<CSSStyleSheet> >& styleSheets)
{
for (unsigned i = 0; i < styleSheets.size(); ++i)
m_pendingStyleSheets.remove(styleSheets[i].get());
}
void StyleResolver::appendCSSStyleSheet(CSSStyleSheet* cssSheet)
{
ASSERT(cssSheet);
ASSERT(!cssSheet->disabled());
if (cssSheet->mediaQueries() && !m_medium->eval(cssSheet->mediaQueries(), &m_viewportDependentMediaQueryResults))
return;
StyleSheetContents* sheet = cssSheet->contents();
ContainerNode* scopingNode = ScopedStyleResolver::scopingNodeFor(document(), cssSheet);
if (!scopingNode)
return;
ScopedStyleResolver* resolver = ensureScopedStyleResolver(scopingNode);
ASSERT(resolver);
resolver->addRulesFromSheet(sheet, *m_medium, this);
m_inspectorCSSOMWrappers.collectFromStyleSheetIfNeeded(cssSheet);
}
void StyleResolver::appendPendingAuthorStyleSheets()
{
setBuildScopedStyleTreeInDocumentOrder(false);
for (ListHashSet<CSSStyleSheet*, 16>::iterator it = m_pendingStyleSheets.begin(); it != m_pendingStyleSheets.end(); ++it)
appendCSSStyleSheet(*it);
m_pendingStyleSheets.clear();
finishAppendAuthorStyleSheets();
}
void StyleResolver::appendAuthorStyleSheets(unsigned firstNew, const Vector<RefPtr<CSSStyleSheet> >& styleSheets)
{
// This handles sheets added to the end of the stylesheet list only. In other cases the style resolver
// needs to be reconstructed. To handle insertions too the rule order numbers would need to be updated.
unsigned size = styleSheets.size();
for (unsigned i = firstNew; i < size; ++i)
appendCSSStyleSheet(styleSheets[i].get());
}
void StyleResolver::finishAppendAuthorStyleSheets()
{
collectFeatures();
if (document().renderer() && document().renderer()->style())
document().renderer()->style()->font().update(document().styleEngine()->fontSelector());
collectViewportRules();
document().styleEngine()->resetCSSFeatureFlags(m_features);
}
void StyleResolver::resetRuleFeatures()
{
// Need to recreate RuleFeatureSet.
m_features.clear();
m_siblingRuleSet.clear();
m_uncommonAttributeRuleSet.clear();
m_needCollectFeatures = true;
}
void StyleResolver::addTreeBoundaryCrossingRules(const Vector<MinimalRuleData>& rules, ContainerNode* scope)
{
for (unsigned i = 0; i < rules.size(); ++i) {
const MinimalRuleData& info = rules[i];
m_treeBoundaryCrossingRules.addRule(info.m_rule, info.m_selectorIndex, scope, info.m_flags);
}
}
void StyleResolver::processScopedRules(const RuleSet& authorRules, const KURL& sheetBaseURL, ContainerNode* scope)
{
const Vector<StyleRuleKeyframes*> keyframesRules = authorRules.keyframesRules();
for (unsigned i = 0; i < keyframesRules.size(); ++i)
ensureScopedStyleResolver(scope)->addKeyframeStyle(keyframesRules[i]);
addTreeBoundaryCrossingRules(authorRules.treeBoundaryCrossingRules(), scope);
// FIXME(BUG 72461): We don't add @font-face rules of scoped style sheets for the moment.
if (!scope || scope->isDocumentNode()) {
const Vector<StyleRuleFontFace*> fontFaceRules = authorRules.fontFaceRules();
for (unsigned i = 0; i < fontFaceRules.size(); ++i)
addFontFaceRule(&m_document, document().styleEngine()->fontSelector(), fontFaceRules[i]);
if (fontFaceRules.size())
invalidateMatchedPropertiesCache();
} else {
addTreeBoundaryCrossingRules(authorRules.shadowDistributedRules(), scope);
}
}
void StyleResolver::resetAuthorStyle(const ContainerNode* scopingNode)
{
// FIXME: When chanking scoped attribute, scopingNode's hasScopedHTMLStyleChild has been already modified.
// So we cannot use hasScopedHTMLStyleChild flag here.
ScopedStyleResolver* resolver = scopingNode ? m_styleTree.lookupScopedStyleResolverFor(scopingNode) : m_styleTree.scopedStyleResolverForDocument();
if (!resolver)
return;
treeBoundaryCrossingRules().reset(scopingNode);
resolver->resetAuthorStyle();
resetRuleFeatures();
if (!scopingNode)
return;
m_styleTree.remove(scopingNode);
}
static PassOwnPtr<RuleSet> makeRuleSet(const Vector<RuleFeature>& rules)
{
size_t size = rules.size();
if (!size)
return nullptr;
OwnPtr<RuleSet> ruleSet = RuleSet::create();
for (size_t i = 0; i < size; ++i)
ruleSet->addRule(rules[i].rule, rules[i].selectorIndex, rules[i].hasDocumentSecurityOrigin ? RuleHasDocumentSecurityOrigin : RuleHasNoSpecialState);
return ruleSet.release();
}
void StyleResolver::collectFeatures()
{
m_features.clear();
// Collect all ids and rules using sibling selectors (:first-child and similar)
// in the current set of stylesheets. Style sharing code uses this information to reject
// sharing candidates.
if (CSSDefaultStyleSheets::defaultStyle)
m_features.add(CSSDefaultStyleSheets::defaultStyle->features());
if (document().isViewSource())
m_features.add(CSSDefaultStyleSheets::viewSourceStyle()->features());
if (m_watchedSelectorsRules)
m_features.add(m_watchedSelectorsRules->features());
m_treeBoundaryCrossingRules.collectFeaturesTo(m_features);
m_styleTree.collectFeaturesTo(m_features);
m_siblingRuleSet = makeRuleSet(m_features.siblingRules);
m_uncommonAttributeRuleSet = makeRuleSet(m_features.uncommonAttributeRules);
m_needCollectFeatures = false;
}
bool StyleResolver::hasRulesForId(const AtomicString& id) const
{
return m_features.idsInRules.contains(id);
}
void StyleResolver::addToStyleSharingList(Element& element)
{
// Never add elements to the style sharing list if we're not in a recalcStyle,
// otherwise we could leave stale pointers in there.
if (!document().inStyleRecalc())
return;
INCREMENT_STYLE_STATS_COUNTER(*this, sharedStyleCandidates);
if (m_styleSharingList.size() >= styleSharingListSize)
m_styleSharingList.remove(--m_styleSharingList.end());
m_styleSharingList.prepend(&element);
}
void StyleResolver::clearStyleSharingList()
{
m_styleSharingList.clear();
}
void StyleResolver::fontsNeedUpdate(FontSelector* fontSelector)
{
invalidateMatchedPropertiesCache();
m_document.setNeedsStyleRecalc();
}
void StyleResolver::pushParentElement(Element& parent)
{
const ContainerNode* parentsParent = parent.parentOrShadowHostElement();
// We are not always invoked consistently. For example, script execution can cause us to enter
// style recalc in the middle of tree building. We may also be invoked from somewhere within the tree.
// Reset the stack in this case, or if we see a new root element.
// Otherwise just push the new parent.
if (!parentsParent || m_selectorFilter.parentStackIsEmpty())
m_selectorFilter.setupParentStack(parent);
else
m_selectorFilter.pushParent(parent);
// Note: We mustn't skip ShadowRoot nodes for the scope stack.
m_styleTree.pushStyleCache(parent, parent.parentOrShadowHostNode());
}
void StyleResolver::popParentElement(Element& parent)
{
// Note that we may get invoked for some random elements in some wacky cases during style resolve.
// Pause maintaining the stack in this case.
if (m_selectorFilter.parentStackIsConsistent(&parent))
m_selectorFilter.popParent();
m_styleTree.popStyleCache(parent);
}
void StyleResolver::pushParentShadowRoot(const ShadowRoot& shadowRoot)
{
ASSERT(shadowRoot.host());
m_styleTree.pushStyleCache(shadowRoot, shadowRoot.host());
}
void StyleResolver::popParentShadowRoot(const ShadowRoot& shadowRoot)
{
ASSERT(shadowRoot.host());
m_styleTree.popStyleCache(shadowRoot);
}
StyleResolver::~StyleResolver()
{
m_viewportStyleResolver->clearDocument();
}
inline void StyleResolver::collectTreeBoundaryCrossingRules(Element* element, ElementRuleCollector& collector, bool includeEmptyRules)
{
if (m_treeBoundaryCrossingRules.isEmpty())
return;
RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
CascadeOrder cascadeOrder = 0;
DocumentOrderedList::iterator it = m_treeBoundaryCrossingRules.end();
while (it != m_treeBoundaryCrossingRules.begin()) {
--it;
const ContainerNode* scopingNode = toContainerNode(*it);
RuleSet* ruleSet = m_treeBoundaryCrossingRules.ruleSetScopedBy(scopingNode);
unsigned boundaryBehavior = SelectorChecker::CrossesBoundary | SelectorChecker::ScopeContainsLastMatchedElement;
// If a given scoping node is a shadow root and a given element is in a descendant tree of tree hosted by
// the scoping node's shadow host, we should use ScopeIsShadowHost.
if (scopingNode && scopingNode->isShadowRoot()) {
if (element->isInDescendantTreeOf(toShadowRoot(scopingNode)->host()))
boundaryBehavior |= SelectorChecker::ScopeIsShadowHost;
scopingNode = toShadowRoot(scopingNode)->host();
}
collector.collectMatchingRules(MatchRequest(ruleSet, includeEmptyRules, scopingNode), ruleRange, static_cast<SelectorChecker::BehaviorAtBoundary>(boundaryBehavior), ignoreCascadeScope, cascadeOrder++);
}
}
static inline bool applyAuthorStylesOf(const Element* element)
{
return element->treeScope().applyAuthorStyles() || (element->shadow() && element->shadow()->applyAuthorStyles());
}
void StyleResolver::matchAuthorRulesForShadowHost(Element* element, ElementRuleCollector& collector, bool includeEmptyRules, Vector<ScopedStyleResolver*, 8>& resolvers, Vector<ScopedStyleResolver*, 8>& resolversInShadowTree)
{
collector.clearMatchedRules();
collector.matchedResult().ranges.lastAuthorRule = collector.matchedResult().matchedProperties.size() - 1;
CascadeScope cascadeScope = 0;
CascadeOrder cascadeOrder = 0;
bool applyAuthorStyles = applyAuthorStylesOf(element);
for (int j = resolversInShadowTree.size() - 1; j >= 0; --j)
resolversInShadowTree.at(j)->collectMatchingAuthorRules(collector, includeEmptyRules, applyAuthorStyles, cascadeScope, cascadeOrder++);
if (resolvers.isEmpty() || resolvers.first()->treeScope() != element->treeScope())
++cascadeScope;
cascadeOrder += resolvers.size();
for (unsigned i = 0; i < resolvers.size(); ++i)
resolvers.at(i)->collectMatchingAuthorRules(collector, includeEmptyRules, applyAuthorStyles, cascadeScope++, --cascadeOrder);
collectTreeBoundaryCrossingRules(element, collector, includeEmptyRules);
collector.sortAndTransferMatchedRules();
}
void StyleResolver::matchAuthorRules(Element* element, ElementRuleCollector& collector, bool includeEmptyRules)
{
collector.clearMatchedRules();
collector.matchedResult().ranges.lastAuthorRule = collector.matchedResult().matchedProperties.size() - 1;
bool applyAuthorStyles = applyAuthorStylesOf(element);
if (m_styleTree.hasOnlyScopedResolverForDocument()) {
m_styleTree.scopedStyleResolverForDocument()->collectMatchingAuthorRules(collector, includeEmptyRules, applyAuthorStyles, ignoreCascadeScope);
collectTreeBoundaryCrossingRules(element, collector, includeEmptyRules);
collector.sortAndTransferMatchedRules();
return;
}
Vector<ScopedStyleResolver*, 8> resolvers;
m_styleTree.resolveScopedStyles(element, resolvers);
Vector<ScopedStyleResolver*, 8> resolversInShadowTree;
m_styleTree.collectScopedResolversForHostedShadowTrees(element, resolversInShadowTree);
if (!resolversInShadowTree.isEmpty()) {
matchAuthorRulesForShadowHost(element, collector, includeEmptyRules, resolvers, resolversInShadowTree);
return;
}
if (resolvers.isEmpty())
return;
CascadeScope cascadeScope = 0;
CascadeOrder cascadeOrder = resolvers.size();
for (unsigned i = 0; i < resolvers.size(); ++i, --cascadeOrder) {
ScopedStyleResolver* resolver = resolvers.at(i);
// FIXME: Need to clarify how to treat style scoped.
resolver->collectMatchingAuthorRules(collector, includeEmptyRules, applyAuthorStyles, cascadeScope++, resolver->treeScope() == element->treeScope() && resolver->scopingNode().isShadowRoot() ? 0 : cascadeOrder);
}
collectTreeBoundaryCrossingRules(element, collector, includeEmptyRules);
collector.sortAndTransferMatchedRules();
}
void StyleResolver::matchWatchSelectorRules(ElementRuleCollector& collector)
{
if (!m_watchedSelectorsRules)
return;
collector.clearMatchedRules();
collector.matchedResult().ranges.lastUserRule = collector.matchedResult().matchedProperties.size() - 1;
MatchRequest matchRequest(m_watchedSelectorsRules.get());
RuleRange ruleRange = collector.matchedResult().ranges.userRuleRange();
collector.collectMatchingRules(matchRequest, ruleRange);
collector.collectMatchingRulesForRegion(matchRequest, ruleRange);
collector.sortAndTransferMatchedRules();
}
void StyleResolver::matchUARules(ElementRuleCollector& collector)
{
collector.setMatchingUARules(true);
RuleSet* userAgentStyleSheet = m_medium->mediaTypeMatchSpecific("print")
? CSSDefaultStyleSheets::defaultPrintStyle : CSSDefaultStyleSheets::defaultStyle;
matchUARules(collector, userAgentStyleSheet);
// In quirks mode, we match rules from the quirks user agent sheet.
if (document().inQuirksMode())
matchUARules(collector, CSSDefaultStyleSheets::defaultQuirksStyle);
// If document uses view source styles (in view source mode or in xml viewer mode), then we match rules from the view source style sheet.
if (document().isViewSource())
matchUARules(collector, CSSDefaultStyleSheets::viewSourceStyle());
collector.setMatchingUARules(false);
matchWatchSelectorRules(collector);
}
void StyleResolver::matchUARules(ElementRuleCollector& collector, RuleSet* rules)
{
collector.clearMatchedRules();
collector.matchedResult().ranges.lastUARule = collector.matchedResult().matchedProperties.size() - 1;
RuleRange ruleRange = collector.matchedResult().ranges.UARuleRange();
collector.collectMatchingRules(MatchRequest(rules), ruleRange);
collector.sortAndTransferMatchedRules();
}
void StyleResolver::matchAllRules(StyleResolverState& state, ElementRuleCollector& collector, bool includeSMILProperties)
{
matchUARules(collector);
// Now check author rules, beginning first with presentational attributes mapped from HTML.
if (state.element()->isStyledElement()) {
collector.addElementStyleProperties(state.element()->presentationAttributeStyle());
// Now we check additional mapped declarations.
// Tables and table cells share an additional mapped rule that must be applied
// after all attributes, since their mapped style depends on the values of multiple attributes.
collector.addElementStyleProperties(state.element()->additionalPresentationAttributeStyle());
if (state.element()->isHTMLElement()) {
bool isAuto;
TextDirection textDirection = toHTMLElement(state.element())->directionalityIfhasDirAutoAttribute(isAuto);
if (isAuto)
collector.matchedResult().addMatchedProperties(textDirection == LTR ? leftToRightDeclaration() : rightToLeftDeclaration());
}
}
matchAuthorRules(state.element(), collector, false);
if (state.element()->isStyledElement()) {
if (state.element()->inlineStyle()) {
// Inline style is immutable as long as there is no CSSOM wrapper.
bool isInlineStyleCacheable = !state.element()->inlineStyle()->isMutable();
collector.addElementStyleProperties(state.element()->inlineStyle(), isInlineStyleCacheable);
}
// Now check SMIL animation override style.
if (includeSMILProperties && state.element()->isSVGElement())
collector.addElementStyleProperties(toSVGElement(state.element())->animatedSMILStyleProperties(), false /* isCacheable */);
}
}
PassRefPtr<RenderStyle> StyleResolver::styleForDocument(Document& document, CSSFontSelector* fontSelector)
{
const Frame* frame = document.frame();
// HTML5 states that seamless iframes should replace default CSS values
// with values inherited from the containing iframe element. However,
// some values (such as the case of designMode = "on") still need to
// be set by this "document style".
RefPtr<RenderStyle> documentStyle = RenderStyle::create();
bool seamlessWithParent = document.shouldDisplaySeamlesslyWithParent();
if (seamlessWithParent) {
RenderStyle* iframeStyle = document.seamlessParentIFrame()->renderStyle();
if (iframeStyle)
documentStyle->inheritFrom(iframeStyle);
}
// FIXME: It's not clear which values below we want to override in the seamless case!
documentStyle->setDisplay(BLOCK);
if (!seamlessWithParent) {
documentStyle->setRTLOrdering(document.visuallyOrdered() ? VisualOrder : LogicalOrder);
documentStyle->setZoom(frame && !document.printing() ? frame->pageZoomFactor() : 1);
documentStyle->setLocale(document.contentLanguage());
}
// This overrides any -webkit-user-modify inherited from the parent iframe.
documentStyle->setUserModify(document.inDesignMode() ? READ_WRITE : READ_ONLY);
document.setStyleDependentState(documentStyle.get());
return documentStyle.release();
}
// FIXME: This is duplicated with StyleAdjuster.cpp
// Perhaps this should move onto ElementResolveContext or even Element?
static inline bool isAtShadowBoundary(const Element* element)
{
if (!element)
return false;
ContainerNode* parentNode = element->parentNode();
return parentNode && parentNode->isShadowRoot();
}
static inline void resetDirectionAndWritingModeOnDocument(Document& document)
{
document.setDirectionSetOnDocumentElement(false);
document.setWritingModeSetOnDocumentElement(false);
}
static void addContentAttrValuesToFeatures(const Vector<AtomicString>& contentAttrValues, RuleFeatureSet& features)
{
for (size_t i = 0; i < contentAttrValues.size(); ++i)
features.attrsInRules.add(contentAttrValues[i]);
}
PassRefPtr<RenderStyle> StyleResolver::styleForElement(Element* element, RenderStyle* defaultParent, StyleSharingBehavior sharingBehavior,
RuleMatchingBehavior matchingBehavior, RenderRegion* regionForStyling)
{
ASSERT(document().frame());
ASSERT(documentSettings());
ASSERT(!hasPendingAuthorStyleSheets());
ASSERT(!m_needCollectFeatures);
// Once an element has a renderer, we don't try to destroy it, since otherwise the renderer
// will vanish if a style recalc happens during loading.
if (sharingBehavior == AllowStyleSharing && !element->document().haveStylesheetsLoaded() && !element->renderer()) {
if (!s_styleNotYetAvailable) {
s_styleNotYetAvailable = RenderStyle::create().leakRef();
s_styleNotYetAvailable->setDisplay(NONE);
s_styleNotYetAvailable->font().update(document().styleEngine()->fontSelector());
}
element->document().setHasNodesWithPlaceholderStyle();
return s_styleNotYetAvailable;
}
didAccess();
if (element == document().documentElement())
resetDirectionAndWritingModeOnDocument(document());
StyleResolverState state(document(), element, defaultParent, regionForStyling);
if (sharingBehavior == AllowStyleSharing && !state.distributedToInsertionPoint() && state.parentStyle()) {
SharedStyleFinder styleFinder(state.elementContext(), m_features, m_siblingRuleSet.get(), m_uncommonAttributeRuleSet.get(), *this);
if (RefPtr<RenderStyle> sharedStyle = styleFinder.findSharedStyle())
return sharedStyle.release();
}
if (state.parentStyle()) {
state.setStyle(RenderStyle::create());
state.style()->inheritFrom(state.parentStyle(), isAtShadowBoundary(element) ? RenderStyle::AtShadowBoundary : RenderStyle::NotAtShadowBoundary);
} else {
state.setStyle(defaultStyleForElement());
state.setParentStyle(RenderStyle::clone(state.style()));
}
// contenteditable attribute (implemented by -webkit-user-modify) should
// be propagated from shadow host to distributed node.
if (state.distributedToInsertionPoint()) {
if (Element* parent = element->parentElement()) {
if (RenderStyle* styleOfShadowHost = parent->renderStyle())
state.style()->setUserModify(styleOfShadowHost->userModify());
}
}
state.fontBuilder().initForStyleResolve(state.document(), state.style(), state.useSVGZoomRules());
if (element->isLink()) {
state.style()->setIsLink(true);
EInsideLink linkState = state.elementLinkState();
if (linkState != NotInsideLink) {
bool forceVisited = InspectorInstrumentation::forcePseudoState(element, CSSSelector::PseudoVisited);
if (forceVisited)
linkState = InsideVisitedLink;
}
state.style()->setInsideLink(linkState);
}
bool needsCollection = false;
CSSDefaultStyleSheets::ensureDefaultStyleSheetsForElement(element, needsCollection);
if (needsCollection) {
collectFeatures();
m_inspectorCSSOMWrappers.reset();
}
{
ElementRuleCollector collector(state.elementContext(), m_selectorFilter, state.style());
collector.setRegionForStyling(regionForStyling);
if (matchingBehavior == MatchOnlyUserAgentRules)
matchUARules(collector);
else
matchAllRules(state, collector, matchingBehavior != MatchAllRulesExcludingSMIL);
applyMatchedProperties(state, collector.matchedResult());
addContentAttrValuesToFeatures(state.contentAttrValues(), m_features);
}
{
StyleAdjuster adjuster(state.cachedUAStyle(), m_document.inQuirksMode());
adjuster.adjustRenderStyle(state.style(), state.parentStyle(), element);
}
// FIXME: The CSSWG wants to specify that the effects of animations are applied before
// important rules, but this currently happens here as we require adjustment to have happened
// before deciding which properties to transition.
applyAnimatedProperties(state, element);
// FIXME: Shouldn't this be on RenderBody::styleDidChange?
if (element->hasTagName(bodyTag))
document().textLinkColors().setTextColor(state.style()->color());
setAnimationUpdateIfNeeded(state, *element);
// Now return the style.
return state.takeStyle();
}
PassRefPtr<RenderStyle> StyleResolver::styleForKeyframe(Element* element, const RenderStyle& elementStyle, const StyleKeyframe* keyframe, const AtomicString& animationName)
{
ASSERT(document().frame());
ASSERT(documentSettings());
ASSERT(!hasPendingAuthorStyleSheets());
if (element == document().documentElement())
resetDirectionAndWritingModeOnDocument(document());
StyleResolverState state(document(), element);
MatchResult result;
if (keyframe->properties())
result.addMatchedProperties(keyframe->properties());
ASSERT(!state.style());
// Create the style
state.setStyle(RenderStyle::clone(&elementStyle));
state.setLineHeightValue(0);
// Make sure that the CSSAnimationData for the animation to which this
// keyframe belongs is first in the list. This makes sure that if the
// animation-timing-function property is set for this keyframe, it will be
// applied to the correct CSSAnimationData object. Note that objects other
// than the first in the list are ignored when reading the timing function
// value. See KeyframeValue::timingFunction().
CSSAnimationDataList* animations = state.style()->accessAnimations();
ASSERT(animations && !animations->isEmpty());
while (animations->animation(0)->name() != animationName)
animations->remove(0);
ASSERT(!animations->isEmpty() && animations->animation(0)->name() == animationName);
state.fontBuilder().initForStyleResolve(state.document(), state.style(), state.useSVGZoomRules());
// We don't need to bother with !important. Since there is only ever one
// decl, there's nothing to override. So just add the first properties.
bool inheritedOnly = false;
if (keyframe->properties()) {
// FIXME: Can't keyframes contain variables?
applyMatchedProperties<AnimationProperties>(state, result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
applyMatchedProperties<HighPriorityProperties>(state, result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
}
// If our font got dirtied, go ahead and update it now.
updateFont(state);
// Line-height is set when we are sure we decided on the font-size
if (state.lineHeightValue())
StyleBuilder::applyProperty(CSSPropertyLineHeight, state, state.lineHeightValue());
// Now do rest of the properties.
if (keyframe->properties())
applyMatchedProperties<LowPriorityProperties>(state, result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
// If our font got dirtied by one of the non-essential font props,
// go ahead and update it a second time.
updateFont(state);
// Start loading resources referenced by this style.
m_styleResourceLoader.loadPendingResources(state.style(), state.elementStyleResources());
document().styleEngine()->fontSelector()->loadPendingFonts();
didAccess();
return state.takeStyle();
}
void StyleResolver::keyframeStylesForAnimation(Element* e, const RenderStyle& elementStyle, KeyframeList& list)
{
ASSERT(!RuntimeEnabledFeatures::webAnimationsCSSEnabled());
list.clear();
// Get the keyframesRule for this name
if (!e || list.animationName().isEmpty())
return;
ASSERT(!hasPendingAuthorStyleSheets());
const StyleRuleKeyframes* keyframesRule = CSSAnimations::matchScopedKeyframesRule(this, e, list.animationName().impl());
if (!keyframesRule)
return;
// Construct and populate the style for each keyframe
const AtomicString& name = list.animationName();
const Vector<RefPtr<StyleKeyframe> >& keyframes = keyframesRule->keyframes();
for (unsigned i = 0; i < keyframes.size(); ++i) {
// Apply the declaration to the style. This is a simplified version of the logic in styleForElement
const StyleKeyframe* keyframe = keyframes[i].get();
KeyframeValue keyframeValue(0, 0);
keyframeValue.setStyle(styleForKeyframe(e, elementStyle, keyframe, name));
keyframeValue.addProperties(keyframe->properties());
// Add this keyframe style to all the indicated key times
const Vector<double>& keys = keyframe->keys();
for (size_t keyIndex = 0; keyIndex < keys.size(); ++keyIndex) {
keyframeValue.setKey(keys[keyIndex]);
list.insert(keyframeValue);
}
}
// If the 0% keyframe is missing, create it (but only if there is at least one other keyframe)
int initialListSize = list.size();
if (initialListSize > 0 && list[0].key()) {
static StyleKeyframe* zeroPercentKeyframe;
if (!zeroPercentKeyframe) {
zeroPercentKeyframe = StyleKeyframe::create().leakRef();
zeroPercentKeyframe->setKeyText("0%");
}
KeyframeValue keyframeValue(0, 0);
keyframeValue.setStyle(styleForKeyframe(e, elementStyle, zeroPercentKeyframe, name));
keyframeValue.addProperties(zeroPercentKeyframe->properties());
list.insert(keyframeValue);
}
// If the 100% keyframe is missing, create it (but only if there is at least one other keyframe)
if (initialListSize > 0 && (list[list.size() - 1].key() != 1)) {
static StyleKeyframe* hundredPercentKeyframe;
if (!hundredPercentKeyframe) {
hundredPercentKeyframe = StyleKeyframe::create().leakRef();
hundredPercentKeyframe->setKeyText("100%");
}
KeyframeValue keyframeValue(1, 0);
keyframeValue.setStyle(styleForKeyframe(e, elementStyle, hundredPercentKeyframe, name));
keyframeValue.addProperties(hundredPercentKeyframe->properties());
list.insert(keyframeValue);
}
}
// This function is used by the WebAnimations JavaScript API method animate().
// FIXME: Remove this when animate() switches away from resolution-dependent parsing.
PassRefPtr<KeyframeAnimationEffect> StyleResolver::createKeyframeAnimationEffect(Element& element, const Vector<RefPtr<MutableStylePropertySet> >& propertySetVector, KeyframeAnimationEffect::KeyframeVector& keyframes)
{
ASSERT(RuntimeEnabledFeatures::webAnimationsAPIEnabled());
ASSERT(propertySetVector.size() == keyframes.size());
StyleResolverState state(element.document(), &element);
state.setStyle(RenderStyle::create());
for (unsigned i = 0; i < propertySetVector.size(); ++i) {
for (unsigned j = 0; j < propertySetVector[i]->propertyCount(); ++j) {
CSSPropertyID id = propertySetVector[i]->propertyAt(j).id();
StyleBuilder::applyProperty(id, state, propertySetVector[i]->getPropertyCSSValue(id).get());
keyframes[i]->setPropertyValue(id, CSSAnimatableValueFactory::create(id, *state.style()).get());
}
}
return KeyframeAnimationEffect::create(keyframes);
}
PassRefPtr<RenderStyle> StyleResolver::pseudoStyleForElement(Element* element, const PseudoStyleRequest& pseudoStyleRequest, RenderStyle* parentStyle)
{
ASSERT(document().frame());
ASSERT(documentSettings());
ASSERT(parentStyle);
if (!element)
return 0;
StyleResolverState state(document(), element, parentStyle);
if (pseudoStyleRequest.allowsInheritance(state.parentStyle())) {
state.setStyle(RenderStyle::create());
state.style()->inheritFrom(state.parentStyle());
} else {
state.setStyle(defaultStyleForElement());
state.setParentStyle(RenderStyle::clone(state.style()));
}
state.fontBuilder().initForStyleResolve(state.document(), state.style(), state.useSVGZoomRules());
// Since we don't use pseudo-elements in any of our quirk/print
// user agent rules, don't waste time walking those rules.
{
// Check UA, user and author rules.
ElementRuleCollector collector(state.elementContext(), m_selectorFilter, state.style());
collector.setPseudoStyleRequest(pseudoStyleRequest);
matchUARules(collector);
matchAuthorRules(state.element(), collector, false);
if (collector.matchedResult().matchedProperties.isEmpty())
return 0;
state.style()->setStyleType(pseudoStyleRequest.pseudoId);
applyMatchedProperties(state, collector.matchedResult());
addContentAttrValuesToFeatures(state.contentAttrValues(), m_features);
}
{
StyleAdjuster adjuster(state.cachedUAStyle(), m_document.inQuirksMode());
// FIXME: Passing 0 as the Element* introduces a lot of complexity
// in the adjustRenderStyle code.
adjuster.adjustRenderStyle(state.style(), state.parentStyle(), 0);
}
// FIXME: The CSSWG wants to specify that the effects of animations are applied before
// important rules, but this currently happens here as we require adjustment to have happened
// before deciding which properties to transition.
applyAnimatedProperties(state, element->pseudoElement(pseudoStyleRequest.pseudoId));
didAccess();
if (PseudoElement* pseudoElement = element->pseudoElement(pseudoStyleRequest.pseudoId))
setAnimationUpdateIfNeeded(state, *pseudoElement);
// Now return the style.
return state.takeStyle();
}
PassRefPtr<RenderStyle> StyleResolver::styleForPage(int pageIndex)
{
ASSERT(!hasPendingAuthorStyleSheets());
resetDirectionAndWritingModeOnDocument(document());
StyleResolverState state(document(), document().documentElement()); // m_rootElementStyle will be set to the document style.
state.setStyle(RenderStyle::create());
const RenderStyle* rootElementStyle = state.rootElementStyle() ? state.rootElementStyle() : document().renderStyle();
ASSERT(rootElementStyle);
state.style()->inheritFrom(rootElementStyle);
state.fontBuilder().initForStyleResolve(state.document(), state.style(), state.useSVGZoomRules());
PageRuleCollector collector(rootElementStyle, pageIndex);
collector.matchPageRules(CSSDefaultStyleSheets::defaultPrintStyle);
if (ScopedStyleResolver* scopedResolver = m_styleTree.scopedStyleResolverForDocument())
scopedResolver->matchPageRules(collector);
state.setLineHeightValue(0);
bool inheritedOnly = false;
MatchResult& result = collector.matchedResult();
applyMatchedProperties<VariableDefinitions>(state, result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
applyMatchedProperties<HighPriorityProperties>(state, result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
// If our font got dirtied, go ahead and update it now.
updateFont(state);
// Line-height is set when we are sure we decided on the font-size.
if (state.lineHeightValue())
StyleBuilder::applyProperty(CSSPropertyLineHeight, state, state.lineHeightValue());
applyMatchedProperties<LowPriorityProperties>(state, result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
addContentAttrValuesToFeatures(state.contentAttrValues(), m_features);
// Start loading resources referenced by this style.
m_styleResourceLoader.loadPendingResources(state.style(), state.elementStyleResources());
document().styleEngine()->fontSelector()->loadPendingFonts();
didAccess();
// Now return the style.
return state.takeStyle();
}
void StyleResolver::collectViewportRules()
{
viewportStyleResolver()->collectViewportRules(CSSDefaultStyleSheets::defaultStyle, ViewportStyleResolver::UserAgentOrigin);
if (!InspectorInstrumentation::applyViewportStyleOverride(&document(), this))
viewportStyleResolver()->collectViewportRules(CSSDefaultStyleSheets::defaultViewportStyle, ViewportStyleResolver::UserAgentOrigin);
if (document().isMobileDocument())
viewportStyleResolver()->collectViewportRules(CSSDefaultStyleSheets::xhtmlMobileProfileStyle(), ViewportStyleResolver::UserAgentOrigin);
if (ScopedStyleResolver* scopedResolver = m_styleTree.scopedStyleResolverForDocument())
scopedResolver->collectViewportRulesTo(this);
viewportStyleResolver()->resolve();
}
PassRefPtr<RenderStyle> StyleResolver::defaultStyleForElement()
{
StyleResolverState state(document(), 0);
state.setStyle(RenderStyle::create());
state.fontBuilder().initForStyleResolve(document(), state.style(), state.useSVGZoomRules());
state.style()->setLineHeight(RenderStyle::initialLineHeight());
state.setLineHeightValue(0);
state.fontBuilder().setInitial(state.style()->effectiveZoom());
state.style()->font().update(document().styleEngine()->fontSelector());
return state.takeStyle();
}
PassRefPtr<RenderStyle> StyleResolver::styleForText(Text* textNode)
{
ASSERT(textNode);
NodeRenderingTraversal::ParentDetails parentDetails;
Node* parentNode = NodeRenderingTraversal::parent(textNode, &parentDetails);
if (!parentNode || !parentNode->renderStyle() || parentDetails.resetStyleInheritance())
return defaultStyleForElement();
return parentNode->renderStyle();
}
bool StyleResolver::checkRegionStyle(Element* regionElement)
{
// FIXME (BUG 72472): We don't add @-webkit-region rules of scoped style sheets for the moment,
// so all region rules are global by default. Verify whether that can stand or needs changing.
if (ScopedStyleResolver* scopedResolver = m_styleTree.scopedStyleResolverForDocument()) {
if (scopedResolver->checkRegionStyle(regionElement))
return true;
}
return false;
}
void StyleResolver::updateFont(StyleResolverState& state)
{
state.fontBuilder().createFont(document().styleEngine()->fontSelector(), state.parentStyle(), state.style());
}
PassRefPtr<StyleRuleList> StyleResolver::styleRulesForElement(Element* element, unsigned rulesToInclude)
{
ASSERT(element);
StyleResolverState state(document(), element);
ElementRuleCollector collector(state.elementContext(), m_selectorFilter, state.style());
collector.setMode(SelectorChecker::CollectingStyleRules);
collectPseudoRulesForElement(element, collector, NOPSEUDO, rulesToInclude);
return collector.matchedStyleRuleList();
}
PassRefPtr<CSSRuleList> StyleResolver::pseudoCSSRulesForElement(Element* element, PseudoId pseudoId, unsigned rulesToInclude, ShouldIncludeStyleSheetInCSSOMWrapper includeDocument)
{
ASSERT(element);
StyleResolverState state(document(), element);
ElementRuleCollector collector(state.elementContext(), m_selectorFilter, state.style(), includeDocument);
collector.setMode(SelectorChecker::CollectingCSSRules);
collectPseudoRulesForElement(element, collector, pseudoId, rulesToInclude);
return collector.matchedCSSRuleList();
}
PassRefPtr<CSSRuleList> StyleResolver::cssRulesForElement(Element* element, unsigned rulesToInclude, ShouldIncludeStyleSheetInCSSOMWrapper includeDocument)
{
return pseudoCSSRulesForElement(element, NOPSEUDO, rulesToInclude, includeDocument);
}
void StyleResolver::collectPseudoRulesForElement(Element* element, ElementRuleCollector& collector, PseudoId pseudoId, unsigned rulesToInclude)
{
collector.setPseudoStyleRequest(PseudoStyleRequest(pseudoId));
if (rulesToInclude & UAAndUserCSSRules)
matchUARules(collector);
if (rulesToInclude & AuthorCSSRules) {
collector.setSameOriginOnly(!(rulesToInclude & CrossOriginCSSRules));
matchAuthorRules(element, collector, rulesToInclude & EmptyCSSRules);
}
}
// -------------------------------------------------------------------------------------
// this is mostly boring stuff on how to apply a certain rule to the renderstyle...
void StyleResolver::applyAnimatedProperties(StyleResolverState& state, Element* animatingElement)
{
// animatingElement may be null, for example if we're calculating the
// style for a potential pseudo element that has yet to be created.
if (!RuntimeEnabledFeatures::webAnimationsCSSEnabled() || !animatingElement)
return;
if (!animatingElement->hasActiveAnimations()
&& !(state.style()->transitions() && !state.style()->transitions()->isEmpty())
&& !(state.style()->animations() && !state.style()->animations()->isEmpty()))
return;
state.setAnimationUpdate(CSSAnimations::calculateUpdate(animatingElement, *state.style(), this));
if (!state.animationUpdate())
return;
const AnimationEffect::CompositableValueMap& compositableValuesForAnimations = state.animationUpdate()->compositableValuesForAnimations();
const AnimationEffect::CompositableValueMap& compositableValuesForTransitions = state.animationUpdate()->compositableValuesForTransitions();
applyAnimatedProperties<HighPriorityProperties>(state, compositableValuesForAnimations);
applyAnimatedProperties<HighPriorityProperties>(state, compositableValuesForTransitions);
applyAnimatedProperties<LowPriorityProperties>(state, compositableValuesForAnimations);
applyAnimatedProperties<LowPriorityProperties>(state, compositableValuesForTransitions);
// If the animations/transitions change opacity or transform, we need to update
// the style to impose the stacking rules. Note that this is also
// done in StyleResolver::adjustRenderStyle().
RenderStyle* style = state.style();
if (style->hasAutoZIndex() && (style->opacity() < 1.0f || style->hasTransform()))
style->setZIndex(0);
}
template <StyleResolver::StyleApplicationPass pass>
void StyleResolver::applyAnimatedProperties(StyleResolverState& state, const AnimationEffect::CompositableValueMap& compositableValues)
{
ASSERT(RuntimeEnabledFeatures::webAnimationsCSSEnabled());
ASSERT(pass != VariableDefinitions);
ASSERT(pass != AnimationProperties);
for (AnimationEffect::CompositableValueMap::const_iterator iter = compositableValues.begin(); iter != compositableValues.end(); ++iter) {
CSSPropertyID property = iter->key;
if (!isPropertyForPass<pass>(property))
continue;
ASSERT_WITH_MESSAGE(!iter->value->dependsOnUnderlyingValue(), "Web Animations not yet implemented: An interface for compositing onto the underlying value.");
RefPtr<AnimatableValue> animatableValue = iter->value->compositeOnto(0);
AnimatedStyleBuilder::applyProperty(property, state, animatableValue.get());
}
}
// http://dev.w3.org/csswg/css3-regions/#the-at-region-style-rule
// FIXME: add incremental support for other region styling properties.
static inline bool isValidRegionStyleProperty(CSSPropertyID id)
{
switch (id) {
case CSSPropertyBackgroundColor:
case CSSPropertyColor:
return true;
default:
break;
}
return false;
}
static inline bool isValidCueStyleProperty(CSSPropertyID id)
{
switch (id) {
case CSSPropertyBackground:
case CSSPropertyBackgroundAttachment:
case CSSPropertyBackgroundClip:
case CSSPropertyBackgroundColor:
case CSSPropertyBackgroundImage:
case CSSPropertyBackgroundOrigin:
case CSSPropertyBackgroundPosition:
case CSSPropertyBackgroundPositionX:
case CSSPropertyBackgroundPositionY:
case CSSPropertyBackgroundRepeat:
case CSSPropertyBackgroundRepeatX:
case CSSPropertyBackgroundRepeatY:
case CSSPropertyBackgroundSize:
case CSSPropertyColor:
case CSSPropertyFont:
case CSSPropertyFontFamily:
case CSSPropertyFontSize:
case CSSPropertyFontStyle:
case CSSPropertyFontVariant:
case CSSPropertyFontWeight:
case CSSPropertyLineHeight:
case CSSPropertyOpacity:
case CSSPropertyOutline:
case CSSPropertyOutlineColor:
case CSSPropertyOutlineOffset:
case CSSPropertyOutlineStyle:
case CSSPropertyOutlineWidth:
case CSSPropertyVisibility:
case CSSPropertyWhiteSpace:
// FIXME: 'text-decoration' shorthand to be handled when available.
// See https://chromiumcodereview.appspot.com/19516002 for details.
case CSSPropertyTextDecoration:
case CSSPropertyTextShadow:
case CSSPropertyBorderStyle:
return true;
case CSSPropertyTextDecorationLine:
case CSSPropertyTextDecorationStyle:
case CSSPropertyTextDecorationColor:
return RuntimeEnabledFeatures::css3TextDecorationsEnabled();
default:
break;
}
return false;
}
template <StyleResolver::StyleApplicationPass pass>
bool StyleResolver::isPropertyForPass(CSSPropertyID property)
{
COMPILE_ASSERT(CSSPropertyVariable < firstCSSProperty, CSS_variable_is_before_first_property);
const CSSPropertyID firstAnimationProperty = CSSPropertyDisplay;
const CSSPropertyID lastAnimationProperty = CSSPropertyTransitionTimingFunction;
COMPILE_ASSERT(firstCSSProperty == firstAnimationProperty, CSS_first_animation_property_should_be_first_property);
const CSSPropertyID firstHighPriorityProperty = CSSPropertyColor;
const CSSPropertyID lastHighPriorityProperty = CSSPropertyLineHeight;
COMPILE_ASSERT(lastAnimationProperty + 1 == firstHighPriorityProperty, CSS_color_is_first_high_priority_property);
COMPILE_ASSERT(CSSPropertyLineHeight == firstHighPriorityProperty + 17, CSS_line_height_is_end_of_high_prioity_property_range);
COMPILE_ASSERT(CSSPropertyZoom == lastHighPriorityProperty - 1, CSS_zoom_is_before_line_height);
switch (pass) {
case VariableDefinitions:
return property == CSSPropertyVariable;
case AnimationProperties:
return property >= firstAnimationProperty && property <= lastAnimationProperty;
case HighPriorityProperties:
return property >= firstHighPriorityProperty && property <= lastHighPriorityProperty;
case LowPriorityProperties:
return property > lastHighPriorityProperty;
}
ASSERT_NOT_REACHED();
return false;
}
template <StyleResolver::StyleApplicationPass pass>
void StyleResolver::applyProperties(StyleResolverState& state, const StylePropertySet* properties, StyleRule* rule, bool isImportant, bool inheritedOnly, PropertyWhitelistType propertyWhitelistType)
{
ASSERT((propertyWhitelistType != PropertyWhitelistRegion) || state.regionForStyling());
state.setCurrentRule(rule);
unsigned propertyCount = properties->propertyCount();
for (unsigned i = 0; i < propertyCount; ++i) {
StylePropertySet::PropertyReference current = properties->propertyAt(i);
if (isImportant != current.isImportant())
continue;
if (inheritedOnly && !current.isInherited()) {
// If the property value is explicitly inherited, we need to apply further non-inherited properties
// as they might override the value inherited here. For this reason we don't allow declarations with
// explicitly inherited properties to be cached.
ASSERT(!current.value()->isInheritedValue());
continue;
}
CSSPropertyID property = current.id();
if (propertyWhitelistType == PropertyWhitelistRegion && !isValidRegionStyleProperty(property))
continue;
if (propertyWhitelistType == PropertyWhitelistCue && !isValidCueStyleProperty(property))
continue;
if (!isPropertyForPass<pass>(property))
continue;
if (pass == HighPriorityProperties && property == CSSPropertyLineHeight)
state.setLineHeightValue(current.value());
else
StyleBuilder::applyProperty(current.id(), state, current.value());
}
}
template <StyleResolver::StyleApplicationPass pass>
void StyleResolver::applyMatchedProperties(StyleResolverState& state, const MatchResult& matchResult, bool isImportant, int startIndex, int endIndex, bool inheritedOnly)
{
if (startIndex == -1)
return;
if (state.style()->insideLink() != NotInsideLink) {
for (int i = startIndex; i <= endIndex; ++i) {
const MatchedProperties& matchedProperties = matchResult.matchedProperties[i];
unsigned linkMatchType = matchedProperties.linkMatchType;
// FIXME: It would be nicer to pass these as arguments but that requires changes in many places.
state.setApplyPropertyToRegularStyle(linkMatchType & SelectorChecker::MatchLink);
state.setApplyPropertyToVisitedLinkStyle(linkMatchType & SelectorChecker::MatchVisited);
applyProperties<pass>(state, matchedProperties.properties.get(), matchResult.matchedRules[i], isImportant, inheritedOnly, static_cast<PropertyWhitelistType>(matchedProperties.whitelistType));
}
state.setApplyPropertyToRegularStyle(true);
state.setApplyPropertyToVisitedLinkStyle(false);
return;
}
for (int i = startIndex; i <= endIndex; ++i) {
const MatchedProperties& matchedProperties = matchResult.matchedProperties[i];
applyProperties<pass>(state, matchedProperties.properties.get(), matchResult.matchedRules[i], isImportant, inheritedOnly, static_cast<PropertyWhitelistType>(matchedProperties.whitelistType));
}
}
static unsigned computeMatchedPropertiesHash(const MatchedProperties* properties, unsigned size)
{
return StringHasher::hashMemory(properties, sizeof(MatchedProperties) * size);
}
void StyleResolver::invalidateMatchedPropertiesCache()
{
m_matchedPropertiesCache.clear();
}
void StyleResolver::applyMatchedProperties(StyleResolverState& state, const MatchResult& matchResult)
{
const Element* element = state.element();
ASSERT(element);
INCREMENT_STYLE_STATS_COUNTER(*this, matchedPropertyApply);
unsigned cacheHash = matchResult.isCacheable ? computeMatchedPropertiesHash(matchResult.matchedProperties.data(), matchResult.matchedProperties.size()) : 0;
bool applyInheritedOnly = false;
const CachedMatchedProperties* cachedMatchedProperties = 0;
if (cacheHash && (cachedMatchedProperties = m_matchedPropertiesCache.find(cacheHash, state, matchResult))
&& MatchedPropertiesCache::isCacheable(element, state.style(), state.parentStyle())) {
INCREMENT_STYLE_STATS_COUNTER(*this, matchedPropertyCacheHit);
// We can build up the style by copying non-inherited properties from an earlier style object built using the same exact
// style declarations. We then only need to apply the inherited properties, if any, as their values can depend on the
// element context. This is fast and saves memory by reusing the style data structures.
state.style()->copyNonInheritedFrom(cachedMatchedProperties->renderStyle.get());
if (state.parentStyle()->inheritedDataShared(cachedMatchedProperties->parentRenderStyle.get()) && !isAtShadowBoundary(element)) {
INCREMENT_STYLE_STATS_COUNTER(*this, matchedPropertyCacheInheritedHit);
EInsideLink linkStatus = state.style()->insideLink();
// If the cache item parent style has identical inherited properties to the current parent style then the
// resulting style will be identical too. We copy the inherited properties over from the cache and are done.
state.style()->inheritFrom(cachedMatchedProperties->renderStyle.get());
// Unfortunately the link status is treated like an inherited property. We need to explicitly restore it.
state.style()->setInsideLink(linkStatus);
return;
}
applyInheritedOnly = true;
}
// First apply all variable definitions, as they may be used during application of later properties.
applyMatchedProperties<VariableDefinitions>(state, matchResult, false, 0, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
applyMatchedProperties<VariableDefinitions>(state, matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<VariableDefinitions>(state, matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<VariableDefinitions>(state, matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
// Apply animation properties in order to apply animation results and trigger transitions below.
applyMatchedProperties<AnimationProperties>(state, matchResult, false, 0, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
applyMatchedProperties<AnimationProperties>(state, matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<AnimationProperties>(state, matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<AnimationProperties>(state, matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
// Match transition-property / animation-name length by trimming and
// lengthening other transition / animation property lists
// FIXME: This is wrong because we shouldn't affect the computed values
state.style()->adjustAnimations();
state.style()->adjustTransitions();
// Now we have all of the matched rules in the appropriate order. Walk the rules and apply
// high-priority properties first, i.e., those properties that other properties depend on.
// The order is (1) high-priority not important, (2) high-priority important, (3) normal not important
// and (4) normal important.
state.setLineHeightValue(0);
applyMatchedProperties<HighPriorityProperties>(state, matchResult, false, 0, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
applyMatchedProperties<HighPriorityProperties>(state, matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<HighPriorityProperties>(state, matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<HighPriorityProperties>(state, matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
if (cachedMatchedProperties && cachedMatchedProperties->renderStyle->effectiveZoom() != state.style()->effectiveZoom()) {
state.fontBuilder().setFontDirty(true);
applyInheritedOnly = false;
}
// If our font got dirtied, go ahead and update it now.
updateFont(state);
// Line-height is set when we are sure we decided on the font-size.
if (state.lineHeightValue())
StyleBuilder::applyProperty(CSSPropertyLineHeight, state, state.lineHeightValue());
// Many properties depend on the font. If it changes we just apply all properties.
if (cachedMatchedProperties && cachedMatchedProperties->renderStyle->fontDescription() != state.style()->fontDescription())
applyInheritedOnly = false;
// Now do the normal priority UA properties.
applyMatchedProperties<LowPriorityProperties>(state, matchResult, false, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
// Cache the UA properties to pass them to RenderTheme in adjustRenderStyle.
state.cacheUserAgentBorderAndBackground();
// Now do the author and user normal priority properties and all the !important properties.
applyMatchedProperties<LowPriorityProperties>(state, matchResult, false, matchResult.ranges.lastUARule + 1, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
applyMatchedProperties<LowPriorityProperties>(state, matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<LowPriorityProperties>(state, matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<LowPriorityProperties>(state, matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
// Start loading resources referenced by this style.
m_styleResourceLoader.loadPendingResources(state.style(), state.elementStyleResources());
document().styleEngine()->fontSelector()->loadPendingFonts();
if (!cachedMatchedProperties && cacheHash && MatchedPropertiesCache::isCacheable(element, state.style(), state.parentStyle())) {
INCREMENT_STYLE_STATS_COUNTER(*this, matchedPropertyCacheAdded);
m_matchedPropertiesCache.add(state.style(), state.parentStyle(), cacheHash, matchResult);
}
ASSERT(!state.fontBuilder().fontDirty());
}
CSSPropertyValue::CSSPropertyValue(CSSPropertyID id, const StylePropertySet& propertySet)
: property(id), value(propertySet.getPropertyCSSValue(id).get())
{ }
void StyleResolver::enableStats(StatsReportType reportType)
{
if (m_styleResolverStats)
return;
m_styleResolverStats = StyleResolverStats::create();
m_styleResolverStatsTotals = StyleResolverStats::create();
if (reportType == ReportSlowStats) {
m_styleResolverStats->printMissedCandidateCount = true;
m_styleResolverStatsTotals->printMissedCandidateCount = true;
}
}
void StyleResolver::disableStats()
{
m_styleResolverStatsSequence = 0;
m_styleResolverStats.clear();
m_styleResolverStatsTotals.clear();
}
void StyleResolver::printStats()
{
if (!m_styleResolverStats)
return;
fprintf(stderr, "=== Style Resolver Stats (resolve #%u) (%s) ===\n", ++m_styleResolverStatsSequence, m_document.url().string().utf8().data());
fprintf(stderr, "%s\n", m_styleResolverStats->report().utf8().data());
fprintf(stderr, "== Totals ==\n");
fprintf(stderr, "%s\n", m_styleResolverStatsTotals->report().utf8().data());
}
void StyleResolver::applyPropertiesToStyle(const CSSPropertyValue* properties, size_t count, RenderStyle* style)
{
StyleResolverState state(document(), document().documentElement(), style);
state.setStyle(style);
state.fontBuilder().initForStyleResolve(document(), style, state.useSVGZoomRules());
for (size_t i = 0; i < count; ++i) {
if (properties[i].value) {
// As described in BUG66291, setting font-size and line-height on a font may entail a CSSPrimitiveValue::computeLengthDouble call,
// which assumes the fontMetrics are available for the affected font, otherwise a crash occurs (see http://trac.webkit.org/changeset/96122).
// The updateFont() call below updates the fontMetrics and ensure the proper setting of font-size and line-height.
switch (properties[i].property) {
case CSSPropertyFontSize:
case CSSPropertyLineHeight:
updateFont(state);
break;
default:
break;
}
StyleBuilder::applyProperty(properties[i].property, state, properties[i].value);
}
}
}
void StyleResolver::addMediaQueryResults(const MediaQueryResultList& list)
{
for (size_t i = 0; i < list.size(); ++i)
m_viewportDependentMediaQueryResults.append(list[i]);
}
bool StyleResolver::affectedByViewportChange() const
{
for (unsigned i = 0; i < m_viewportDependentMediaQueryResults.size(); ++i) {
if (m_medium->eval(&m_viewportDependentMediaQueryResults[i]->m_expression) != m_viewportDependentMediaQueryResults[i]->m_result)
return true;
}
return false;
}
} // namespace WebCore