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android / platform / external / chromium_org / third_party / WebKit / e69819b / . / Source / core / css / resolver / StyleResolver.cpp
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/*
* 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"
// FIXME: This include list is way more than we need!
#include "CSSPropertyNames.h"
#include "HTMLNames.h"
#include "RuntimeEnabledFeatures.h"
#include "SVGNames.h"
#include "XMLNames.h"
#include "core/animation/AnimatableValue.h"
#include "core/animation/Animation.h"
#include "core/css/CSSCalculationValue.h"
#include "core/css/CSSCursorImageValue.h"
#include "core/css/CSSDefaultStyleSheets.h"
#include "core/css/CSSFontSelector.h"
#include "core/css/CSSImageSetValue.h"
#include "core/css/CSSKeyframeRule.h"
#include "core/css/CSSKeyframesRule.h"
#include "core/css/CSSLineBoxContainValue.h"
#include "core/css/CSSParser.h"
#include "core/css/CSSPrimitiveValueMappings.h"
#include "core/css/CSSReflectValue.h"
#include "core/css/CSSSVGDocumentValue.h"
#include "core/css/CSSSelector.h"
#include "core/css/CSSSelectorList.h"
#include "core/css/CSSStyleRule.h"
#include "core/css/CSSValueList.h"
#include "core/css/CSSVariableValue.h"
#include "core/css/ElementRuleCollector.h"
#include "core/css/FontFeatureValue.h"
#include "core/css/FontSize.h"
#include "core/css/MediaQueryEvaluator.h"
#include "core/css/PageRuleCollector.h"
#include "core/css/Pair.h"
#include "core/css/RuleSet.h"
#include "core/css/StylePropertySet.h"
#include "core/css/StylePropertyShorthand.h"
#include "core/css/StyleSheetContents.h"
#include "core/css/resolver/ElementStyleResources.h"
#include "core/css/resolver/FilterOperationResolver.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/StyleBuilder.h"
#include "core/css/resolver/ViewportStyleResolver.h"
#include "core/dom/DocumentStyleSheetCollection.h"
#include "core/dom/FullscreenController.h"
#include "core/dom/NodeRenderStyle.h"
#include "core/dom/NodeRenderingContext.h"
#include "core/dom/Text.h"
#include "core/dom/WebCoreMemoryInstrumentation.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/html/HTMLHtmlElement.h"
#include "core/html/HTMLIFrameElement.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/loader/cache/CachedDocument.h"
#include "core/loader/cache/CachedSVGDocumentReference.h"
#include "core/page/Frame.h"
#include "core/page/FrameView.h"
#include "core/page/Page.h"
#include "core/page/Settings.h"
#include "core/platform/graphics/filters/custom/CustomFilterConstants.h"
#include "core/platform/text/LocaleToScriptMapping.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/MemoryInstrumentationHashMap.h"
#include "wtf/MemoryInstrumentationVector.h"
#include "wtf/StdLibExtras.h"
#include "wtf/Vector.h"
using namespace std;
namespace WTF {
template<> struct SequenceMemoryInstrumentationTraits<const WebCore::RuleData*> {
template <typename I> static void reportMemoryUsage(I, I, MemoryClassInfo&) { }
};
}
namespace WebCore {
using namespace HTMLNames;
RenderStyle* StyleResolver::s_styleNotYetAvailable;
static StylePropertySet* leftToRightDeclaration()
{
DEFINE_STATIC_LOCAL(RefPtr<MutableStylePropertySet>, leftToRightDecl, (MutableStylePropertySet::create()));
if (leftToRightDecl->isEmpty())
leftToRightDecl->setProperty(CSSPropertyDirection, CSSValueLtr);
return leftToRightDecl.get();
}
static StylePropertySet* rightToLeftDeclaration()
{
DEFINE_STATIC_LOCAL(RefPtr<MutableStylePropertySet>, rightToLeftDecl, (MutableStylePropertySet::create()));
if (rightToLeftDecl->isEmpty())
rightToLeftDecl->setProperty(CSSPropertyDirection, CSSValueRtl);
return rightToLeftDecl.get();
}
StyleResolver::StyleResolver(Document* document, bool matchAuthorAndUserStyles)
: m_document(document)
, m_matchAuthorAndUserStyles(matchAuthorAndUserStyles)
, m_fontSelector(CSSFontSelector::create(document))
, m_viewportStyleResolver(ViewportStyleResolver::create(document))
, m_styleResourceLoader(document->cachedResourceLoader())
{
Element* root = document->documentElement();
CSSDefaultStyleSheets::initDefaultStyle(root);
// 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 styleForElement -call
// is always from the document that owns the style selector
FrameView* view = document->view();
if (view)
m_medium = adoptPtr(new MediaQueryEvaluator(view->mediaType()));
else
m_medium = adoptPtr(new MediaQueryEvaluator("all"));
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();
DocumentStyleSheetCollection* styleSheetCollection = document->styleSheetCollection();
m_ruleSets.initUserStyle(styleSheetCollection, *m_medium, *this);
#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)
fontSelector()->addFontFaceRule((*it)->fontFaceRule());
}
#endif
// FIXME: Stylesheet candidate nodes are sorted in document order, but scoping nodes are not sorted.
appendAuthorStyleSheets(0, styleSheetCollection->activeAuthorStyleSheets());
}
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) {
CSSStyleSheet* cssSheet = styleSheets[i].get();
ASSERT(!cssSheet->disabled());
if (cssSheet->mediaQueries() && !m_medium->eval(cssSheet->mediaQueries(), this))
continue;
StyleSheetContents* sheet = cssSheet->contents();
ScopedStyleResolver* resolver = ensureScopedStyleResolver(ScopedStyleResolver::scopingNodeFor(cssSheet));
ASSERT(resolver);
resolver->addRulesFromSheet(sheet, *m_medium, this);
m_inspectorCSSOMWrappers.collectFromStyleSheetIfNeeded(cssSheet);
}
collectFeatures();
if (document()->renderer() && document()->renderer()->style())
document()->renderer()->style()->font().update(fontSelector());
if (RuntimeEnabledFeatures::cssViewportEnabled())
viewportStyleResolver()->resolve();
}
void StyleResolver::resetAuthorStyle()
{
m_styleTree.clear();
}
void StyleResolver::resetAuthorStyle(const ContainerNode* scopingNode)
{
m_styleTree.clear();
ScopedStyleResolver* resolver = scopingNode ? m_styleTree.scopedStyleResolverFor(scopingNode) : m_styleTree.scopedStyleResolverForDocument();
if (!resolver)
return;
m_ruleSets.shadowDistributedRules().reset(scopingNode);
resolver->resetAuthorStyle();
if (!scopingNode || !resolver->hasOnlyEmptyRuleSets())
return;
m_styleTree.remove(scopingNode);
}
void StyleResolver::resetAtHostRules(const ContainerNode* scopingNode)
{
ASSERT(scopingNode);
ASSERT(scopingNode->isShadowRoot());
const ShadowRoot* shadowRoot = toShadowRoot(scopingNode);
const ContainerNode* shadowHost = shadowRoot->shadowHost();
ScopedStyleResolver* resolver = m_styleTree.scopedStyleResolverFor(shadowHost);
if (!resolver)
return;
resolver->resetAtHostRules(shadowRoot);
if (!resolver->hasOnlyEmptyRuleSets())
return;
m_styleTree.remove(shadowHost);
}
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();
m_ruleSets.collectFeaturesTo(m_features, document()->isViewSource());
m_styleTree.collectFeaturesTo(m_features);
m_siblingRuleSet = makeRuleSet(m_features.siblingRules);
m_uncommonAttributeRuleSet = makeRuleSet(m_features.uncommonAttributeRules);
}
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);
}
// This is a simplified style setting function for keyframe styles
void StyleResolver::addKeyframeStyle(PassRefPtr<StyleRuleKeyframes> rule)
{
AtomicString s(rule->name());
m_keyframesRuleMap.set(s.impl(), rule);
}
StyleResolver::~StyleResolver()
{
m_fontSelector->clearDocument();
m_viewportStyleResolver->clearDocument();
}
inline void StyleResolver::matchShadowDistributedRules(ElementRuleCollector& collector, bool includeEmptyRules)
{
if (m_ruleSets.shadowDistributedRules().isEmpty())
return;
bool previousCanUseFastReject = collector.canUseFastReject();
SelectorChecker::BehaviorAtBoundary previousBoundary = collector.behaviorAtBoundary();
collector.setBehaviorAtBoundary(static_cast<SelectorChecker::BehaviorAtBoundary>(SelectorChecker::CrossesBoundary | SelectorChecker::ScopeContainsLastMatchedElement));
collector.setCanUseFastReject(false);
collector.clearMatchedRules();
collector.matchedResult().ranges.lastAuthorRule = collector.matchedResult().matchedProperties.size() - 1;
RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
Vector<MatchRequest> matchRequests;
m_ruleSets.shadowDistributedRules().collectMatchRequests(includeEmptyRules, matchRequests);
for (size_t i = 0; i < matchRequests.size(); ++i)
collector.collectMatchingRules(matchRequests[i], ruleRange);
collector.sortAndTransferMatchedRules();
collector.setBehaviorAtBoundary(previousBoundary);
collector.setCanUseFastReject(previousCanUseFastReject);
}
void StyleResolver::matchHostRules(ScopedStyleResolver* resolver, ElementRuleCollector& collector, bool includeEmptyRules)
{
if (m_state.element() != resolver->scopingNode())
return;
resolver->matchHostRules(collector, includeEmptyRules);
}
void StyleResolver::matchScopedAuthorRules(ElementRuleCollector& collector, bool includeEmptyRules)
{
// fast path
if (m_styleTree.hasOnlyScopedResolverForDocument()) {
m_styleTree.scopedStyleResolverForDocument()->matchAuthorRules(collector, includeEmptyRules, true);
return;
}
Vector<ScopedStyleResolver*, 8> stack;
m_styleTree.resolveScopedStyles(m_state.element(), stack);
if (stack.isEmpty())
return;
bool applyAuthorStyles = m_state.element()->treeScope()->applyAuthorStyles();
for (int i = stack.size() - 1; i >= 0; --i)
stack.at(i)->matchAuthorRules(collector, includeEmptyRules, applyAuthorStyles);
matchHostRules(stack.first(), collector, includeEmptyRules);
}
void StyleResolver::matchAuthorRules(ElementRuleCollector& collector, bool includeEmptyRules)
{
matchScopedAuthorRules(collector, includeEmptyRules);
matchShadowDistributedRules(collector, includeEmptyRules);
}
void StyleResolver::matchUserRules(ElementRuleCollector& collector, bool includeEmptyRules)
{
if (!m_ruleSets.userStyle())
return;
collector.clearMatchedRules();
collector.matchedResult().ranges.lastUserRule = collector.matchedResult().matchedProperties.size() - 1;
MatchRequest matchRequest(m_ruleSets.userStyle(), includeEmptyRules);
RuleRange ruleRange = collector.matchedResult().ranges.userRuleRange();
collector.collectMatchingRules(matchRequest, ruleRange);
collector.collectMatchingRulesForRegion(matchRequest, ruleRange);
collector.sortAndTransferMatchedRules();
}
void StyleResolver::matchUARules(ElementRuleCollector& collector)
{
collector.setMatchingUARules(true);
// First we match rules from the user agent sheet.
if (CSSDefaultStyleSheets::simpleDefaultStyleSheet)
collector.matchedResult().isCacheable = false;
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);
}
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(ElementRuleCollector& collector, bool matchAuthorAndUserStyles, bool includeSMILProperties)
{
matchUARules(collector);
// Now we check user sheet rules.
if (matchAuthorAndUserStyles)
matchUserRules(collector, false);
// Now check author rules, beginning first with presentational attributes mapped from HTML.
if (m_state.element()->isStyledElement()) {
collector.addElementStyleProperties(m_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(m_state.element()->additionalPresentationAttributeStyle());
if (m_state.element()->isHTMLElement()) {
bool isAuto;
TextDirection textDirection = toHTMLElement(m_state.element())->directionalityIfhasDirAutoAttribute(isAuto);
if (isAuto)
collector.matchedResult().addMatchedProperties(textDirection == LTR ? leftToRightDeclaration() : rightToLeftDeclaration());
}
}
// Check the rules in author sheets next.
if (matchAuthorAndUserStyles)
matchAuthorRules(collector, false);
if (m_state.element()->isStyledElement()) {
// Now check our inline style attribute.
if (matchAuthorAndUserStyles && m_state.element()->inlineStyle()) {
// Inline style is immutable as long as there is no CSSOM wrapper.
// FIXME: Media control shadow trees seem to have problems with caching.
bool isInlineStyleCacheable = !m_state.element()->inlineStyle()->isMutable() && !m_state.element()->isInShadowTree();
// FIXME: Constify.
collector.addElementStyleProperties(m_state.element()->inlineStyle(), isInlineStyleCacheable);
}
// Now check SMIL animation override style.
if (includeSMILProperties && matchAuthorAndUserStyles && m_state.element()->isSVGElement())
collector.addElementStyleProperties(toSVGElement(m_state.element())->animatedSMILStyleProperties(), false /* isCacheable */);
if (m_state.element()->hasActiveAnimations())
collector.matchedResult().isCacheable = false;
}
}
bool StyleResolver::styleSharingCandidateMatchesRuleSet(const ElementResolveContext& context, RuleSet* ruleSet)
{
if (!ruleSet)
return false;
ElementRuleCollector collector(context, m_selectorFilter, m_state.style(), m_inspectorCSSOMWrappers);
return collector.hasAnyMatchingRules(ruleSet);
}
static void getFontAndGlyphOrientation(const RenderStyle* style, FontOrientation& fontOrientation, NonCJKGlyphOrientation& glyphOrientation)
{
if (style->isHorizontalWritingMode()) {
fontOrientation = Horizontal;
glyphOrientation = NonCJKGlyphOrientationVerticalRight;
return;
}
switch (style->textOrientation()) {
case TextOrientationVerticalRight:
fontOrientation = Vertical;
glyphOrientation = NonCJKGlyphOrientationVerticalRight;
return;
case TextOrientationUpright:
fontOrientation = Vertical;
glyphOrientation = NonCJKGlyphOrientationUpright;
return;
case TextOrientationSideways:
if (style->writingMode() == LeftToRightWritingMode) {
// FIXME: This should map to sideways-left, which is not supported yet.
fontOrientation = Vertical;
glyphOrientation = NonCJKGlyphOrientationVerticalRight;
return;
}
fontOrientation = Horizontal;
glyphOrientation = NonCJKGlyphOrientationVerticalRight;
return;
case TextOrientationSidewaysRight:
fontOrientation = Horizontal;
glyphOrientation = NonCJKGlyphOrientationVerticalRight;
return;
default:
ASSERT_NOT_REACHED();
fontOrientation = Horizontal;
glyphOrientation = NonCJKGlyphOrientationVerticalRight;
return;
}
}
PassRefPtr<RenderStyle> StyleResolver::styleForDocument(const 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);
Element* docElement = document->documentElement();
RenderObject* docElementRenderer = docElement ? docElement->renderer() : 0;
if (docElementRenderer) {
// Use the direction and writing-mode of the body to set the
// viewport's direction and writing-mode unless the property is set on the document element.
// If there is no body, then use the document element.
RenderObject* bodyRenderer = document->body() ? document->body()->renderer() : 0;
if (bodyRenderer && !document->writingModeSetOnDocumentElement())
documentStyle->setWritingMode(bodyRenderer->style()->writingMode());
else
documentStyle->setWritingMode(docElementRenderer->style()->writingMode());
if (bodyRenderer && !document->directionSetOnDocumentElement())
documentStyle->setDirection(bodyRenderer->style()->direction());
else
documentStyle->setDirection(docElementRenderer->style()->direction());
}
if (frame) {
if (FrameView* frameView = frame->view()) {
const Pagination& pagination = frameView->pagination();
if (pagination.mode != Pagination::Unpaginated) {
Pagination::setStylesForPaginationMode(pagination.mode, documentStyle.get());
documentStyle->setColumnGap(pagination.gap);
if (RenderView* view = document->renderView()) {
if (view->hasColumns())
view->updateColumnInfoFromStyle(documentStyle.get());
}
}
}
}
// Seamless iframes want to inherit their font from their parent iframe, so early return before setting the font.
if (seamlessWithParent)
return documentStyle.release();
FontDescription fontDescription;
fontDescription.setScript(localeToScriptCodeForFontSelection(documentStyle->locale()));
if (Settings* settings = document->settings()) {
fontDescription.setUsePrinterFont(document->printing());
const AtomicString& standardFont = settings->standardFontFamily(fontDescription.script());
if (!standardFont.isEmpty()) {
fontDescription.setGenericFamily(FontDescription::StandardFamily);
fontDescription.firstFamily().setFamily(standardFont);
fontDescription.firstFamily().appendFamily(0);
}
fontDescription.setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1);
int size = FontSize::fontSizeForKeyword(document, CSSValueMedium, false);
fontDescription.setSpecifiedSize(size);
bool useSVGZoomRules = document->isSVGDocument();
fontDescription.setComputedSize(getComputedSizeFromSpecifiedSize(document, documentStyle.get(), fontDescription.isAbsoluteSize(), size, useSVGZoomRules));
} else
fontDescription.setUsePrinterFont(document->printing());
FontOrientation fontOrientation;
NonCJKGlyphOrientation glyphOrientation;
getFontAndGlyphOrientation(documentStyle.get(), fontOrientation, glyphOrientation);
fontDescription.setOrientation(fontOrientation);
fontDescription.setNonCJKGlyphOrientation(glyphOrientation);
documentStyle->setFontDescription(fontDescription);
documentStyle->font().update(fontSelector);
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);
}
PassRefPtr<RenderStyle> StyleResolver::styleForElement(Element* element, RenderStyle* defaultParent, StyleSharingBehavior sharingBehavior,
RuleMatchingBehavior matchingBehavior, RenderRegion* regionForStyling)
{
// 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(m_fontSelector);
}
element->document()->setHasNodesWithPlaceholderStyle();
return s_styleNotYetAvailable;
}
if (element == document()->documentElement())
resetDirectionAndWritingModeOnDocument(document());
StyleResolverState& state = m_state;
StyleResolveScope resolveScope(&state, document(), element, defaultParent, regionForStyling);
if (sharingBehavior == AllowStyleSharing && !state.distributedToInsertionPoint() && state.parentStyle()) {
SharedStyleFinder styleFinder(m_features, m_siblingRuleSet.get(), m_uncommonAttributeRuleSet.get(), this);
RefPtr<RenderStyle> sharedStyle = styleFinder.locateSharedStyle(state.elementContext());
if (sharedStyle)
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());
}
}
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(), m_inspectorCSSOMWrappers);
collector.setRegionForStyling(regionForStyling);
if (matchingBehavior == MatchOnlyUserAgentRules)
matchUARules(collector);
else
matchAllRules(collector, m_matchAuthorAndUserStyles, matchingBehavior != MatchAllRulesExcludingSMIL);
applyMatchedProperties(collector.matchedResult(), element);
}
{
StyleAdjuster adjuster(m_state.cachedUAStyle(), m_document->inQuirksMode());
adjuster.adjustRenderStyle(state.style(), state.parentStyle(), element);
}
document()->didAccessStyleResolver();
// FIXME: Shouldn't this be on RenderBody::styleDidChange?
if (element->hasTagName(bodyTag))
document()->textLinkColors().setTextColor(state.style()->visitedDependentColor(CSSPropertyColor));
// Now return the style.
return state.takeStyle();
}
PassRefPtr<RenderStyle> StyleResolver::styleForKeyframe(Element* e, const RenderStyle* elementStyle, const StyleKeyframe* keyframe, KeyframeValue& keyframeValue)
{
if (e == document()->documentElement())
resetDirectionAndWritingModeOnDocument(document());
StyleResolveScope resolveScope(&m_state, document(), e);
MatchResult result;
if (keyframe->properties())
result.addMatchedProperties(keyframe->properties());
StyleResolverState& state = m_state;
ASSERT(!state.style());
// Create the style
state.setStyle(RenderStyle::clone(elementStyle));
state.setLineHeightValue(0);
// 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>(result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
applyMatchedProperties<HighPriorityProperties>(result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
}
// If our font got dirtied, go ahead and update it now.
updateFont();
// Line-height is set when we are sure we decided on the font-size
if (state.lineHeightValue())
applyProperty(CSSPropertyLineHeight, state.lineHeightValue());
// Now do rest of the properties.
if (keyframe->properties())
applyMatchedProperties<LowPriorityProperties>(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();
// Start loading resources referenced by this style.
m_styleResourceLoader.loadPendingResources(state.style(), state.elementStyleResources());
// Add all the animating properties to the keyframe.
if (const StylePropertySet* styleDeclaration = keyframe->properties()) {
unsigned propertyCount = styleDeclaration->propertyCount();
for (unsigned i = 0; i < propertyCount; ++i) {
CSSPropertyID property = styleDeclaration->propertyAt(i).id();
// Timing-function within keyframes is special, because it is not animated; it just
// describes the timing function between this keyframe and the next.
if (property != CSSPropertyWebkitAnimationTimingFunction)
keyframeValue.addProperty(property);
}
}
document()->didAccessStyleResolver();
return state.takeStyle();
}
void StyleResolver::keyframeStylesForAnimation(Element* e, const RenderStyle* elementStyle, KeyframeList& list)
{
list.clear();
// Get the keyframesRule for this name
if (!e || list.animationName().isEmpty())
return;
m_keyframesRuleMap.checkConsistency();
KeyframesRuleMap::iterator it = m_keyframesRuleMap.find(list.animationName().impl());
if (it == m_keyframesRuleMap.end())
return;
const StyleRuleKeyframes* keyframesRule = it->value.get();
// Construct and populate the style for each keyframe
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, keyframeValue));
// Add this keyframe style to all the indicated key times
Vector<float> keys;
keyframe->getKeys(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, keyframeValue));
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, keyframeValue));
list.insert(keyframeValue);
}
}
PassRefPtr<RenderStyle> StyleResolver::pseudoStyleForElement(Element* e, const PseudoStyleRequest& pseudoStyleRequest, RenderStyle* parentStyle)
{
ASSERT(parentStyle);
if (!e)
return 0;
if (e == document()->documentElement())
resetDirectionAndWritingModeOnDocument(document());
StyleResolverState& state = m_state;
StyleResolveScope resolveScope(&state, document(), e, 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()));
}
// 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(), m_inspectorCSSOMWrappers);
collector.setPseudoStyleRequest(pseudoStyleRequest);
matchUARules(collector);
if (m_matchAuthorAndUserStyles) {
matchUserRules(collector, false);
matchAuthorRules(collector, false);
}
if (collector.matchedResult().matchedProperties.isEmpty())
return 0;
state.style()->setStyleType(pseudoStyleRequest.pseudoId);
applyMatchedProperties(collector.matchedResult(), e);
}
{
StyleAdjuster adjuster(m_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);
}
// Start loading resources referenced by this style.
m_styleResourceLoader.loadPendingResources(state.style(), state.elementStyleResources());
document()->didAccessStyleResolver();
// Now return the style.
return state.takeStyle();
}
PassRefPtr<RenderStyle> StyleResolver::styleForPage(int pageIndex)
{
resetDirectionAndWritingModeOnDocument(document());
StyleResolverState& state = m_state;
StyleResolveScope resolveScope(&state, document(), document()->documentElement()); // m_rootElementStyle will be set to the document style.
state.setStyle(RenderStyle::create());
state.style()->inheritFrom(state.rootElementStyle());
PageRuleCollector collector(state.elementContext(), pageIndex);
collector.matchPageRules(CSSDefaultStyleSheets::defaultPrintStyle);
collector.matchPageRules(m_ruleSets.userStyle());
if (ScopedStyleResolver* scopedResolver = m_styleTree.scopedStyleResolverForDocument())
scopedResolver->matchPageRules(collector);
state.setLineHeightValue(0);
bool inheritedOnly = false;
MatchResult& result = collector.matchedResult();
applyMatchedProperties<VariableDefinitions>(result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
applyMatchedProperties<HighPriorityProperties>(result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
// If our font got dirtied, go ahead and update it now.
updateFont();
// Line-height is set when we are sure we decided on the font-size.
if (state.lineHeightValue())
applyProperty(CSSPropertyLineHeight, state.lineHeightValue());
applyMatchedProperties<LowPriorityProperties>(result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
// Start loading resources referenced by this style.
m_styleResourceLoader.loadPendingResources(state.style(), state.elementStyleResources());
document()->didAccessStyleResolver();
// Now return the style.
return state.takeStyle();
}
PassRefPtr<RenderStyle> StyleResolver::defaultStyleForElement()
{
m_state.setStyle(RenderStyle::create());
// Make sure our fonts are initialized if we don't inherit them from our parent style.
if (const Settings* settings = documentSettings()) {
initializeFontStyle(settings);
m_state.style()->font().update(fontSelector());
} else
m_state.style()->font().update(0);
return m_state.takeStyle();
}
PassRefPtr<RenderStyle> StyleResolver::styleForText(Text* textNode)
{
ASSERT(textNode);
NodeRenderingContext context(textNode);
Node* parentNode = context.parentNodeForRenderingAndStyle();
return context.resetStyleInheritance() || !parentNode || !parentNode->renderStyle() ?
defaultStyleForElement() : 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;
if (m_ruleSets.userStyle()) {
unsigned rulesSize = m_ruleSets.userStyle()->m_regionSelectorsAndRuleSets.size();
for (unsigned i = 0; i < rulesSize; ++i) {
ASSERT(m_ruleSets.userStyle()->m_regionSelectorsAndRuleSets.at(i).ruleSet.get());
if (checkRegionSelector(m_ruleSets.userStyle()->m_regionSelectorsAndRuleSets.at(i).selector, regionElement))
return true;
}
}
return false;
}
static void checkForOrientationChange(RenderStyle* style)
{
FontOrientation fontOrientation;
NonCJKGlyphOrientation glyphOrientation;
getFontAndGlyphOrientation(style, fontOrientation, glyphOrientation);
const FontDescription& fontDescription = style->fontDescription();
if (fontDescription.orientation() == fontOrientation && fontDescription.nonCJKGlyphOrientation() == glyphOrientation)
return;
FontDescription newFontDescription(fontDescription);
newFontDescription.setNonCJKGlyphOrientation(glyphOrientation);
newFontDescription.setOrientation(fontOrientation);
style->setFontDescription(newFontDescription);
}
void StyleResolver::updateFont()
{
if (!m_state.fontDirty())
return;
RenderStyle* style = m_state.style();
checkForGenericFamilyChange(style, m_state.parentStyle());
checkForZoomChange(style, m_state.parentStyle());
checkForOrientationChange(style);
style->font().update(m_fontSelector);
m_state.setFontDirty(false);
}
PassRefPtr<CSSRuleList> StyleResolver::styleRulesForElement(Element* e, unsigned rulesToInclude)
{
return pseudoStyleRulesForElement(e, NOPSEUDO, rulesToInclude);
}
PassRefPtr<CSSRuleList> StyleResolver::pseudoStyleRulesForElement(Element* e, PseudoId pseudoId, unsigned rulesToInclude)
{
if (!e || !e->document()->haveStylesheetsLoaded())
return 0;
if (e == document()->documentElement())
resetDirectionAndWritingModeOnDocument(document());
StyleResolveScope resolveScope(&m_state, document(), e);
ElementRuleCollector collector(m_state.elementContext(), m_selectorFilter, m_state.style(), m_inspectorCSSOMWrappers);
collector.setMode(SelectorChecker::CollectingRules);
collector.setPseudoStyleRequest(PseudoStyleRequest(pseudoId));
if (rulesToInclude & UAAndUserCSSRules) {
// First we match rules from the user agent sheet.
matchUARules(collector);
// Now we check user sheet rules.
if (m_matchAuthorAndUserStyles)
matchUserRules(collector, rulesToInclude & EmptyCSSRules);
}
if (m_matchAuthorAndUserStyles && (rulesToInclude & AuthorCSSRules)) {
collector.setSameOriginOnly(!(rulesToInclude & CrossOriginCSSRules));
// Check the rules in author sheets.
matchAuthorRules(collector, rulesToInclude & EmptyCSSRules);
}
return collector.matchedRuleList();
}
// -------------------------------------------------------------------------------------
// this is mostly boring stuff on how to apply a certain rule to the renderstyle...
template <StyleResolver::StyleApplicationPass pass>
void StyleResolver::applyAnimatedProperties(const Element* target)
{
ASSERT(pass != VariableDefinitions);
ASSERT(pass != AnimationProperties);
if (!target->hasActiveAnimations())
return;
Vector<Animation*>* animations = target->activeAnimations();
for (size_t i = 0; i < animations->size(); ++i) {
RefPtr<Animation> animation = animations->at(i);
const AnimationEffect::CompositableValueMap* compositableValues = animation->compositableValues();
for (AnimationEffect::CompositableValueMap::const_iterator iter = compositableValues->begin(); iter != compositableValues->end(); ++iter) {
CSSPropertyID property = iter->key;
if (!isPropertyForPass<pass>(property))
continue;
RefPtr<CSSValue> value = iter->value->compositeOnto(AnimatableValue::neutralValue())->toCSSValue();
if (pass == HighPriorityProperties && property == CSSPropertyLineHeight)
m_state.setLineHeightValue(value.get());
else
applyProperty(property, value.get());
}
}
}
static inline bool isValidVisitedLinkProperty(CSSPropertyID id)
{
switch (id) {
case CSSPropertyBackgroundColor:
case CSSPropertyBorderLeftColor:
case CSSPropertyBorderRightColor:
case CSSPropertyBorderTopColor:
case CSSPropertyBorderBottomColor:
case CSSPropertyColor:
case CSSPropertyFill:
case CSSPropertyOutlineColor:
case CSSPropertyStroke:
case CSSPropertyTextDecorationColor:
case CSSPropertyWebkitColumnRuleColor:
case CSSPropertyWebkitTextEmphasisColor:
case CSSPropertyWebkitTextFillColor:
case CSSPropertyWebkitTextStrokeColor:
return true;
default:
break;
}
return false;
}
// 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:
case CSSPropertyTextDecoration:
case CSSPropertyTextShadow:
case CSSPropertyBorderStyle:
return true;
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 = CSSPropertyWebkitAnimation;
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 + 18, 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(const StylePropertySet* properties, StyleRule* rule, bool isImportant, bool inheritedOnly, PropertyWhitelistType propertyWhitelistType)
{
ASSERT((propertyWhitelistType != PropertyWhitelistRegion) || m_state.regionForStyling());
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willProcessRule(document(), rule, this);
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)
m_state.setLineHeightValue(current.value());
else
applyProperty(current.id(), current.value());
}
InspectorInstrumentation::didProcessRule(cookie);
}
template <StyleResolver::StyleApplicationPass pass>
void StyleResolver::applyMatchedProperties(const MatchResult& matchResult, bool isImportant, int startIndex, int endIndex, bool inheritedOnly)
{
if (startIndex == -1)
return;
StyleResolverState& state = m_state;
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>(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>(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(const MatchResult& matchResult, const Element* element)
{
ASSERT(element);
StyleResolverState& state = m_state;
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, m_state, matchResult))) {
// 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)) {
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>(matchResult, false, 0, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
applyMatchedProperties<VariableDefinitions>(matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<VariableDefinitions>(matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<VariableDefinitions>(matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
// Apply animation properties in order to apply animation results and trigger transitions below.
applyMatchedProperties<AnimationProperties>(matchResult, false, 0, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
applyMatchedProperties<AnimationProperties>(matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<AnimationProperties>(matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<AnimationProperties>(matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
// FIXME: animations should be triggered here
// 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>(matchResult, false, 0, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
// Animation contributions are processed here because CSS Animations are overridable by user !important rules.
if (RuntimeEnabledFeatures::webAnimationsEnabled())
applyAnimatedProperties<HighPriorityProperties>(element);
applyMatchedProperties<HighPriorityProperties>(matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<HighPriorityProperties>(matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<HighPriorityProperties>(matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
if (cachedMatchedProperties && cachedMatchedProperties->renderStyle->effectiveZoom() != state.style()->effectiveZoom()) {
state.setFontDirty(true);
applyInheritedOnly = false;
}
// If our font got dirtied, go ahead and update it now.
updateFont();
// Line-height is set when we are sure we decided on the font-size.
if (state.lineHeightValue())
applyProperty(CSSPropertyLineHeight, 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>(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>(matchResult, false, matchResult.ranges.lastUARule + 1, matchResult.matchedProperties.size() - 1, applyInheritedOnly);
if (RuntimeEnabledFeatures::webAnimationsEnabled())
applyAnimatedProperties<LowPriorityProperties>(element);
applyMatchedProperties<LowPriorityProperties>(matchResult, true, matchResult.ranges.firstAuthorRule, matchResult.ranges.lastAuthorRule, applyInheritedOnly);
applyMatchedProperties<LowPriorityProperties>(matchResult, true, matchResult.ranges.firstUserRule, matchResult.ranges.lastUserRule, applyInheritedOnly);
applyMatchedProperties<LowPriorityProperties>(matchResult, true, matchResult.ranges.firstUARule, matchResult.ranges.lastUARule, applyInheritedOnly);
// Start loading resources referenced by this style.
m_styleResourceLoader.loadPendingResources(state.style(), state.elementStyleResources());
ASSERT(!state.fontDirty());
if (cachedMatchedProperties || !cacheHash)
return;
if (!MatchedPropertiesCache::isCacheable(state.element(), state.style(), state.parentStyle()))
return;
m_matchedPropertiesCache.add(state.style(), state.parentStyle(), cacheHash, matchResult);
}
CSSPropertyValue::CSSPropertyValue(CSSPropertyID id, const StylePropertySet& propertySet)
: property(id), value(propertySet.getPropertyCSSValue(id).get())
{ }
void StyleResolver::applyPropertiesToStyle(const CSSPropertyValue* properties, size_t count, RenderStyle* style)
{
StyleResolveScope resolveScope(&m_state, document(), 0, style);
m_state.setStyle(style);
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();
break;
default:
break;
}
applyProperty(properties[i].property, properties[i].value);
}
}
}
static bool hasVariableReference(CSSValue* value)
{
if (value->isPrimitiveValue()) {
CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
return primitiveValue->hasVariableReference();
}
if (value->isCalculationValue())
return static_cast<CSSCalcValue*>(value)->hasVariableReference();
if (value->isReflectValue()) {
CSSReflectValue* reflectValue = static_cast<CSSReflectValue*>(value);
CSSPrimitiveValue* direction = reflectValue->direction();
CSSPrimitiveValue* offset = reflectValue->offset();
CSSValue* mask = reflectValue->mask();
return (direction && hasVariableReference(direction)) || (offset && hasVariableReference(offset)) || (mask && hasVariableReference(mask));
}
for (CSSValueListIterator i = value; i.hasMore(); i.advance()) {
if (hasVariableReference(i.value()))
return true;
}
return false;
}
void StyleResolver::resolveVariables(CSSPropertyID id, CSSValue* value, Vector<std::pair<CSSPropertyID, String> >& knownExpressions)
{
std::pair<CSSPropertyID, String> expression(id, value->serializeResolvingVariables(*m_state.style()->variables()));
if (knownExpressions.contains(expression))
return; // cycle detected.
knownExpressions.append(expression);
// FIXME: It would be faster not to re-parse from strings, but for now CSS property validation lives inside the parser so we do it there.
RefPtr<MutableStylePropertySet> resultSet = MutableStylePropertySet::create();
if (!CSSParser::parseValue(resultSet.get(), id, expression.second, false, document()))
return; // expression failed to parse.
for (unsigned i = 0; i < resultSet->propertyCount(); i++) {
StylePropertySet::PropertyReference property = resultSet->propertyAt(i);
if (property.id() != CSSPropertyVariable && hasVariableReference(property.value()))
resolveVariables(property.id(), property.value(), knownExpressions);
else
applyProperty(property.id(), property.value());
}
}
void StyleResolver::applyProperty(CSSPropertyID id, CSSValue* value)
{
if (id != CSSPropertyVariable && hasVariableReference(value)) {
Vector<std::pair<CSSPropertyID, String> > knownExpressions;
resolveVariables(id, value, knownExpressions);
return;
}
// CSS variables don't resolve shorthands at parsing time, so this should be *after* handling variables.
ASSERT_WITH_MESSAGE(!isExpandedShorthand(id), "Shorthand property id = %d wasn't expanded at parsing time", id);
StyleResolverState& state = m_state;
bool isInherit = state.parentNode() && value->isInheritedValue();
bool isInitial = value->isInitialValue() || (!state.parentNode() && value->isInheritedValue());
ASSERT(!isInherit || !isInitial); // isInherit -> !isInitial && isInitial -> !isInherit
ASSERT(!isInherit || (state.parentNode() && state.parentStyle())); // isInherit -> (state.parentNode() && state.parentStyle())
if (!state.applyPropertyToRegularStyle() && (!state.applyPropertyToVisitedLinkStyle() || !isValidVisitedLinkProperty(id))) {
// Limit the properties that can be applied to only the ones honored by :visited.
return;
}
CSSPrimitiveValue* primitiveValue = value->isPrimitiveValue() ? toCSSPrimitiveValue(value) : 0;
if (primitiveValue && primitiveValue->getValueID() == CSSValueCurrentcolor)
state.style()->setHasCurrentColor();
if (isInherit && !state.parentStyle()->hasExplicitlyInheritedProperties() && !CSSProperty::isInheritedProperty(id))
state.parentStyle()->setHasExplicitlyInheritedProperties();
if (id == CSSPropertyVariable) {
ASSERT_WITH_SECURITY_IMPLICATION(value->isVariableValue());
CSSVariableValue* variable = static_cast<CSSVariableValue*>(value);
ASSERT(!variable->name().isEmpty());
ASSERT(!variable->value().isEmpty());
state.style()->setVariable(variable->name(), variable->value());
return;
}
if (StyleBuilder::applyProperty(id, this, state, value, isInitial, isInherit))
return;
// Fall back to the old switch statement, which is now in StyleBuilderCustom.cpp
StyleBuilder::oldApplyProperty(id, this, state, value, isInitial, isInherit);
}
void StyleResolver::checkForZoomChange(RenderStyle* style, RenderStyle* parentStyle)
{
if (style->effectiveZoom() == parentStyle->effectiveZoom())
return;
const FontDescription& childFont = style->fontDescription();
FontDescription newFontDescription(childFont);
setFontSize(newFontDescription, childFont.specifiedSize());
style->setFontDescription(newFontDescription);
}
void StyleResolver::checkForGenericFamilyChange(RenderStyle* style, RenderStyle* parentStyle)
{
const FontDescription& childFont = style->fontDescription();
if (childFont.isAbsoluteSize() || !parentStyle)
return;
const FontDescription& parentFont = parentStyle->fontDescription();
if (childFont.useFixedDefaultSize() == parentFont.useFixedDefaultSize())
return;
// For now, lump all families but monospace together.
if (childFont.genericFamily() != FontDescription::MonospaceFamily
&& parentFont.genericFamily() != FontDescription::MonospaceFamily)
return;
// We know the parent is monospace or the child is monospace, and that font
// size was unspecified. We want to scale our font size as appropriate.
// If the font uses a keyword size, then we refetch from the table rather than
// multiplying by our scale factor.
float size;
if (childFont.keywordSize())
size = FontSize::fontSizeForKeyword(document(), CSSValueXxSmall + childFont.keywordSize() - 1, childFont.useFixedDefaultSize());
else {
Settings* settings = documentSettings();
float fixedScaleFactor = (settings && settings->defaultFixedFontSize() && settings->defaultFontSize())
? static_cast<float>(settings->defaultFixedFontSize()) / settings->defaultFontSize()
: 1;
size = parentFont.useFixedDefaultSize() ?
childFont.specifiedSize() / fixedScaleFactor :
childFont.specifiedSize() * fixedScaleFactor;
}
FontDescription newFontDescription(childFont);
setFontSize(newFontDescription, size);
style->setFontDescription(newFontDescription);
}
void StyleResolver::initializeFontStyle(const Settings* settings)
{
FontDescription fontDescription;
fontDescription.setGenericFamily(FontDescription::StandardFamily);
fontDescription.setUsePrinterFont(document()->printing());
const AtomicString& standardFontFamily = documentSettings()->standardFontFamily();
if (!standardFontFamily.isEmpty()) {
fontDescription.firstFamily().setFamily(standardFontFamily);
fontDescription.firstFamily().appendFamily(0);
}
fontDescription.setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1);
setFontSize(fontDescription, FontSize::fontSizeForKeyword(document(), CSSValueMedium, false));
m_state.style()->setLineHeight(RenderStyle::initialLineHeight());
m_state.setLineHeightValue(0);
m_state.setFontDescription(fontDescription);
}
void StyleResolver::setFontSize(FontDescription& fontDescription, float size)
{
fontDescription.setSpecifiedSize(size);
fontDescription.setComputedSize(getComputedSizeFromSpecifiedSize(document(), m_state.style(), fontDescription.isAbsoluteSize(), size, m_state.useSVGZoomRules()));
}
void StyleResolver::addViewportDependentMediaQueryResult(const MediaQueryExp* expr, bool result)
{
m_viewportDependentMediaQueryResults.append(adoptPtr(new MediaQueryResult(*expr, result)));
}
bool StyleResolver::affectedByViewportChange() const
{
unsigned s = m_viewportDependentMediaQueryResults.size();
for (unsigned i = 0; i < s; i++) {
if (m_medium->eval(&m_viewportDependentMediaQueryResults[i]->m_expression) != m_viewportDependentMediaQueryResults[i]->m_result)
return true;
}
return false;
}
void StyleResolver::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
{
MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
info.addMember(m_ruleSets, "ruleSets");
info.addMember(m_matchedPropertiesCache, "matchedPropertiesCache");
info.addMember(m_medium, "medium");
info.addMember(m_rootDefaultStyle, "rootDefaultStyle");
info.addMember(m_document, "document");
info.addMember(m_fontSelector, "fontSelector");
info.addMember(m_viewportDependentMediaQueryResults, "viewportDependentMediaQueryResults");
info.addMember(m_inspectorCSSOMWrappers);
info.addMember(m_styleTree, "scopedStyleTree");
info.addMember(m_state, "state");
// FIXME: move this to a place where it would be called only once?
info.addMember(CSSDefaultStyleSheets::defaultStyle, "defaultStyle");
info.addMember(CSSDefaultStyleSheets::defaultQuirksStyle, "defaultQuirksStyle");
info.addMember(CSSDefaultStyleSheets::defaultPrintStyle, "defaultPrintStyle");
info.addMember(CSSDefaultStyleSheets::defaultViewSourceStyle, "defaultViewSourceStyle");
}
} // namespace WebCore