| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Copyright (C) 2016 Apple Inc. All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "config.h" |
| #include "CSSParserImpl.h" |
| |
| #include "CSSAtRuleID.h" |
| #include "CSSCustomPropertyValue.h" |
| #include "CSSDeferredParser.h" |
| #include "CSSKeyframeRule.h" |
| #include "CSSKeyframesRule.h" |
| #include "CSSParserObserver.h" |
| #include "CSSParserObserverWrapper.h" |
| #include "CSSParserSelector.h" |
| #include "CSSPropertyParser.h" |
| #include "CSSSelectorParser.h" |
| #include "CSSStyleSheet.h" |
| #include "CSSSupportsParser.h" |
| #include "CSSTokenizer.h" |
| #include "CSSVariableParser.h" |
| #include "Document.h" |
| #include "Element.h" |
| #include "MediaList.h" |
| #include "MediaQueryParser.h" |
| #include "MediaQueryParserContext.h" |
| #include "StyleProperties.h" |
| #include "StyleRuleImport.h" |
| #include "StyleSheetContents.h" |
| |
| #include <bitset> |
| #include <memory> |
| |
| namespace WebCore { |
| |
| CSSParserImpl::CSSParserImpl(const CSSParserContext& context, StyleSheetContents* styleSheet) |
| : m_context(context) |
| , m_styleSheet(styleSheet) |
| { |
| |
| } |
| |
| CSSParserImpl::CSSParserImpl(CSSDeferredParser& deferredParser) |
| : m_context(deferredParser.context()) |
| , m_styleSheet(deferredParser.styleSheet()) |
| , m_deferredParser(&deferredParser) |
| { |
| } |
| |
| CSSParserImpl::CSSParserImpl(const CSSParserContext& context, const String& string, StyleSheetContents* styleSheet, CSSParserObserverWrapper* wrapper, CSSParser::RuleParsing ruleParsing) |
| : m_context(context) |
| , m_styleSheet(styleSheet) |
| , m_observerWrapper(wrapper) |
| { |
| m_tokenizer = wrapper ? std::make_unique<CSSTokenizer>(string, *wrapper) : std::make_unique<CSSTokenizer>(string); |
| if (context.deferredCSSParserEnabled && !wrapper && styleSheet && ruleParsing == CSSParser::RuleParsing::Deferred) |
| m_deferredParser = CSSDeferredParser::create(context, string, *styleSheet); |
| } |
| |
| CSSParser::ParseResult CSSParserImpl::parseValue(MutableStyleProperties* declaration, CSSPropertyID propertyID, const String& string, bool important, const CSSParserContext& context) |
| { |
| CSSParserImpl parser(context, string); |
| StyleRule::Type ruleType = StyleRule::Style; |
| #if ENABLE(CSS_DEVICE_ADAPTATION) |
| if (declaration->cssParserMode() == CSSViewportRuleMode) |
| ruleType = StyleRule::Viewport; |
| #endif |
| parser.consumeDeclarationValue(parser.tokenizer()->tokenRange(), propertyID, important, ruleType); |
| if (parser.m_parsedProperties.isEmpty()) |
| return CSSParser::ParseResult::Error; |
| return declaration->addParsedProperties(parser.m_parsedProperties) ? CSSParser::ParseResult::Changed : CSSParser::ParseResult::Unchanged; |
| } |
| |
| CSSParser::ParseResult CSSParserImpl::parseCustomPropertyValue(MutableStyleProperties* declaration, const AtomString& propertyName, const String& string, bool important, const CSSParserContext& context) |
| { |
| CSSParserImpl parser(context, string); |
| parser.consumeCustomPropertyValue(parser.tokenizer()->tokenRange(), propertyName, important); |
| if (parser.m_parsedProperties.isEmpty()) |
| return CSSParser::ParseResult::Error; |
| return declaration->addParsedProperties(parser.m_parsedProperties) ? CSSParser::ParseResult::Changed : CSSParser::ParseResult::Unchanged; |
| } |
| |
| static inline void filterProperties(bool important, const ParsedPropertyVector& input, ParsedPropertyVector& output, size_t& unusedEntries, std::bitset<numCSSProperties>& seenProperties, HashSet<AtomString>& seenCustomProperties) |
| { |
| // Add properties in reverse order so that highest priority definitions are reached first. Duplicate definitions can then be ignored when found. |
| for (size_t i = input.size(); i--; ) { |
| const CSSProperty& property = input[i]; |
| if (property.isImportant() != important) |
| continue; |
| const unsigned propertyIDIndex = property.id() - firstCSSProperty; |
| |
| if (property.id() == CSSPropertyCustom) { |
| auto& name = downcast<CSSCustomPropertyValue>(*property.value()).name(); |
| if (!seenCustomProperties.add(name).isNewEntry) |
| continue; |
| output[--unusedEntries] = property; |
| continue; |
| } |
| |
| // FIXME-NEWPARSER: We won't support @apply yet. |
| /*else if (property.id() == CSSPropertyApplyAtRule) { |
| // FIXME: Do we need to do anything here? |
| } */ |
| |
| if (seenProperties.test(propertyIDIndex)) |
| continue; |
| seenProperties.set(propertyIDIndex); |
| |
| output[--unusedEntries] = property; |
| } |
| } |
| |
| Ref<DeferredStyleProperties> CSSParserImpl::createDeferredStyleProperties(const CSSParserTokenRange& propertyRange) |
| { |
| ASSERT(m_deferredParser); |
| return DeferredStyleProperties::create(propertyRange, *m_deferredParser); |
| } |
| |
| static Ref<ImmutableStyleProperties> createStyleProperties(ParsedPropertyVector& parsedProperties, CSSParserMode mode) |
| { |
| std::bitset<numCSSProperties> seenProperties; |
| size_t unusedEntries = parsedProperties.size(); |
| ParsedPropertyVector results(unusedEntries); |
| HashSet<AtomString> seenCustomProperties; |
| |
| filterProperties(true, parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties); |
| filterProperties(false, parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties); |
| |
| Ref<ImmutableStyleProperties> result = ImmutableStyleProperties::create(results.data() + unusedEntries, results.size() - unusedEntries, mode); |
| parsedProperties.clear(); |
| return result; |
| } |
| |
| Ref<ImmutableStyleProperties> CSSParserImpl::parseInlineStyleDeclaration(const String& string, const Element* element) |
| { |
| CSSParserContext context(element->document()); |
| context.mode = strictToCSSParserMode(element->isHTMLElement() && !element->document().inQuirksMode()); |
| |
| CSSParserImpl parser(context, string); |
| parser.consumeDeclarationList(parser.tokenizer()->tokenRange(), StyleRule::Style); |
| return createStyleProperties(parser.m_parsedProperties, context.mode); |
| } |
| |
| Ref<ImmutableStyleProperties> CSSParserImpl::parseDeferredDeclaration(CSSParserTokenRange tokenRange, const CSSParserContext& context, StyleSheetContents* styleSheet) |
| { |
| if (!styleSheet) { |
| ParsedPropertyVector properties; |
| return createStyleProperties(properties, context.mode); |
| } |
| CSSParserImpl parser(context, styleSheet); |
| parser.consumeDeclarationList(tokenRange, StyleRule::Style); |
| return createStyleProperties(parser.m_parsedProperties, context.mode); |
| } |
| |
| void CSSParserImpl::parseDeferredRuleList(CSSParserTokenRange tokenRange, CSSDeferredParser& deferredParser, Vector<RefPtr<StyleRuleBase>>& childRules) |
| { |
| if (!deferredParser.styleSheet()) |
| return; |
| CSSParserImpl parser(deferredParser); |
| parser.consumeRuleList(tokenRange, RegularRuleList, [&childRules](const RefPtr<StyleRuleBase>& rule) { |
| childRules.append(rule); |
| }); |
| childRules.shrinkToFit(); |
| } |
| |
| void CSSParserImpl::parseDeferredKeyframeList(CSSParserTokenRange tokenRange, CSSDeferredParser& deferredParser, StyleRuleKeyframes& keyframeRule) |
| { |
| if (!deferredParser.styleSheet()) |
| return; |
| CSSParserImpl parser(deferredParser); |
| parser.consumeRuleList(tokenRange, KeyframesRuleList, [&keyframeRule](const RefPtr<StyleRuleBase>& keyframe) { |
| keyframeRule.parserAppendKeyframe(downcast<const StyleRuleKeyframe>(keyframe.get())); |
| }); |
| } |
| |
| bool CSSParserImpl::parseDeclarationList(MutableStyleProperties* declaration, const String& string, const CSSParserContext& context) |
| { |
| CSSParserImpl parser(context, string); |
| StyleRule::Type ruleType = StyleRule::Style; |
| #if ENABLE(CSS_DEVICE_ADAPTATION) |
| if (declaration->cssParserMode() == CSSViewportRuleMode) |
| ruleType = StyleRule::Viewport; |
| #endif |
| parser.consumeDeclarationList(parser.tokenizer()->tokenRange(), ruleType); |
| if (parser.m_parsedProperties.isEmpty()) |
| return false; |
| |
| std::bitset<numCSSProperties> seenProperties; |
| size_t unusedEntries = parser.m_parsedProperties.size(); |
| ParsedPropertyVector results(unusedEntries); |
| HashSet<AtomString> seenCustomProperties; |
| filterProperties(true, parser.m_parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties); |
| filterProperties(false, parser.m_parsedProperties, results, unusedEntries, seenProperties, seenCustomProperties); |
| if (unusedEntries) |
| results.remove(0, unusedEntries); |
| return declaration->addParsedProperties(results); |
| } |
| |
| RefPtr<StyleRuleBase> CSSParserImpl::parseRule(const String& string, const CSSParserContext& context, StyleSheetContents* styleSheet, AllowedRulesType allowedRules) |
| { |
| CSSParserImpl parser(context, string, styleSheet); |
| CSSParserTokenRange range = parser.tokenizer()->tokenRange(); |
| range.consumeWhitespace(); |
| if (range.atEnd()) |
| return nullptr; // Parse error, empty rule |
| RefPtr<StyleRuleBase> rule; |
| if (range.peek().type() == AtKeywordToken) |
| rule = parser.consumeAtRule(range, allowedRules); |
| else |
| rule = parser.consumeQualifiedRule(range, allowedRules); |
| if (!rule) |
| return nullptr; // Parse error, failed to consume rule |
| range.consumeWhitespace(); |
| if (!rule || !range.atEnd()) |
| return nullptr; // Parse error, trailing garbage |
| return rule; |
| } |
| |
| void CSSParserImpl::parseStyleSheet(const String& string, const CSSParserContext& context, StyleSheetContents* styleSheet, CSSParser::RuleParsing ruleParsing) |
| { |
| CSSParserImpl parser(context, string, styleSheet, nullptr, ruleParsing); |
| bool firstRuleValid = parser.consumeRuleList(parser.tokenizer()->tokenRange(), TopLevelRuleList, [&styleSheet](RefPtr<StyleRuleBase> rule) { |
| if (rule->isCharsetRule()) |
| return; |
| styleSheet->parserAppendRule(rule.releaseNonNull()); |
| }); |
| styleSheet->setHasSyntacticallyValidCSSHeader(firstRuleValid); |
| parser.adoptTokenizerEscapedStrings(); |
| } |
| |
| void CSSParserImpl::adoptTokenizerEscapedStrings() |
| { |
| if (!m_deferredParser || !m_tokenizer) |
| return; |
| m_deferredParser->adoptTokenizerEscapedStrings(m_tokenizer->escapedStringsForAdoption()); |
| } |
| |
| CSSSelectorList CSSParserImpl::parsePageSelector(CSSParserTokenRange range, StyleSheetContents* styleSheet) |
| { |
| // We only support a small subset of the css-page spec. |
| range.consumeWhitespace(); |
| AtomString typeSelector; |
| if (range.peek().type() == IdentToken) |
| typeSelector = range.consume().value().toAtomString(); |
| |
| AtomString pseudo; |
| if (range.peek().type() == ColonToken) { |
| range.consume(); |
| if (range.peek().type() != IdentToken) |
| return CSSSelectorList(); |
| pseudo = range.consume().value().toAtomString(); |
| } |
| |
| range.consumeWhitespace(); |
| if (!range.atEnd()) |
| return CSSSelectorList(); // Parse error; extra tokens in @page selector |
| |
| std::unique_ptr<CSSParserSelector> selector; |
| if (!typeSelector.isNull() && pseudo.isNull()) |
| selector = std::make_unique<CSSParserSelector>(QualifiedName(nullAtom(), typeSelector, styleSheet->defaultNamespace())); |
| else { |
| selector = std::make_unique<CSSParserSelector>(); |
| if (!pseudo.isNull()) { |
| selector = std::unique_ptr<CSSParserSelector>(CSSParserSelector::parsePagePseudoSelector(pseudo)); |
| if (!selector || selector->match() != CSSSelector::PagePseudoClass) |
| return CSSSelectorList(); |
| } |
| if (!typeSelector.isNull()) |
| selector->prependTagSelector(QualifiedName(nullAtom(), typeSelector, styleSheet->defaultNamespace())); |
| } |
| |
| selector->setForPage(); |
| return CSSSelectorList { Vector<std::unique_ptr<CSSParserSelector>>::from(WTFMove(selector)) }; |
| } |
| |
| std::unique_ptr<Vector<double>> CSSParserImpl::parseKeyframeKeyList(const String& keyList) |
| { |
| return consumeKeyframeKeyList(CSSTokenizer(keyList).tokenRange()); |
| } |
| |
| bool CSSParserImpl::supportsDeclaration(CSSParserTokenRange& range) |
| { |
| ASSERT(m_parsedProperties.isEmpty()); |
| consumeDeclaration(range, StyleRule::Style); |
| bool result = !m_parsedProperties.isEmpty(); |
| m_parsedProperties.clear(); |
| return result; |
| } |
| |
| void CSSParserImpl::parseDeclarationListForInspector(const String& declaration, const CSSParserContext& context, CSSParserObserver& observer) |
| { |
| CSSParserObserverWrapper wrapper(observer); |
| CSSParserImpl parser(context, declaration, nullptr, &wrapper); |
| observer.startRuleHeader(StyleRule::Style, 0); |
| observer.endRuleHeader(1); |
| parser.consumeDeclarationList(parser.tokenizer()->tokenRange(), StyleRule::Style); |
| } |
| |
| void CSSParserImpl::parseStyleSheetForInspector(const String& string, const CSSParserContext& context, StyleSheetContents* styleSheet, CSSParserObserver& observer) |
| { |
| CSSParserObserverWrapper wrapper(observer); |
| CSSParserImpl parser(context, string, styleSheet, &wrapper); |
| bool firstRuleValid = parser.consumeRuleList(parser.tokenizer()->tokenRange(), TopLevelRuleList, [&styleSheet](RefPtr<StyleRuleBase> rule) { |
| if (rule->isCharsetRule()) |
| return; |
| styleSheet->parserAppendRule(rule.releaseNonNull()); |
| }); |
| styleSheet->setHasSyntacticallyValidCSSHeader(firstRuleValid); |
| } |
| |
| static CSSParserImpl::AllowedRulesType computeNewAllowedRules(CSSParserImpl::AllowedRulesType allowedRules, StyleRuleBase* rule) |
| { |
| if (!rule || allowedRules == CSSParserImpl::KeyframeRules || allowedRules == CSSParserImpl::NoRules) |
| return allowedRules; |
| ASSERT(allowedRules <= CSSParserImpl::RegularRules); |
| if (rule->isCharsetRule() || rule->isImportRule()) |
| return CSSParserImpl::AllowImportRules; |
| if (rule->isNamespaceRule()) |
| return CSSParserImpl::AllowNamespaceRules; |
| return CSSParserImpl::RegularRules; |
| } |
| |
| template<typename T> |
| bool CSSParserImpl::consumeRuleList(CSSParserTokenRange range, RuleListType ruleListType, const T callback) |
| { |
| AllowedRulesType allowedRules = RegularRules; |
| switch (ruleListType) { |
| case TopLevelRuleList: |
| allowedRules = AllowCharsetRules; |
| break; |
| case RegularRuleList: |
| allowedRules = RegularRules; |
| break; |
| case KeyframesRuleList: |
| allowedRules = KeyframeRules; |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| bool seenRule = false; |
| bool firstRuleValid = false; |
| while (!range.atEnd()) { |
| RefPtr<StyleRuleBase> rule; |
| switch (range.peek().type()) { |
| case WhitespaceToken: |
| range.consumeWhitespace(); |
| continue; |
| case AtKeywordToken: |
| rule = consumeAtRule(range, allowedRules); |
| break; |
| case CDOToken: |
| case CDCToken: |
| if (ruleListType == TopLevelRuleList) { |
| range.consume(); |
| continue; |
| } |
| FALLTHROUGH; |
| default: |
| rule = consumeQualifiedRule(range, allowedRules); |
| break; |
| } |
| if (!seenRule) { |
| seenRule = true; |
| firstRuleValid = rule; |
| } |
| if (rule) { |
| allowedRules = computeNewAllowedRules(allowedRules, rule.get()); |
| callback(rule); |
| } |
| } |
| |
| return firstRuleValid; |
| } |
| |
| RefPtr<StyleRuleBase> CSSParserImpl::consumeAtRule(CSSParserTokenRange& range, AllowedRulesType allowedRules) |
| { |
| ASSERT(range.peek().type() == AtKeywordToken); |
| const StringView name = range.consumeIncludingWhitespace().value(); |
| const CSSParserToken* preludeStart = &range.peek(); |
| while (!range.atEnd() && range.peek().type() != LeftBraceToken && range.peek().type() != SemicolonToken) |
| range.consumeComponentValue(); |
| |
| CSSParserTokenRange prelude = range.makeSubRange(preludeStart, &range.peek()); |
| CSSAtRuleID id = cssAtRuleID(name); |
| |
| if (range.atEnd() || range.peek().type() == SemicolonToken) { |
| range.consume(); |
| if (allowedRules == AllowCharsetRules && id == CSSAtRuleCharset) |
| return consumeCharsetRule(prelude); |
| if (allowedRules <= AllowImportRules && id == CSSAtRuleImport) |
| return consumeImportRule(prelude); |
| if (allowedRules <= AllowNamespaceRules && id == CSSAtRuleNamespace) |
| return consumeNamespaceRule(prelude); |
| // FIXME-NEWPARSER: Support "apply" |
| /*if (allowedRules == ApplyRules && id == CSSAtRuleApply) { |
| consumeApplyRule(prelude); |
| return nullptr; // consumeApplyRule just updates m_parsedProperties |
| }*/ |
| return nullptr; // Parse error, unrecognised at-rule without block |
| } |
| |
| CSSParserTokenRange block = range.consumeBlock(); |
| if (allowedRules == KeyframeRules) |
| return nullptr; // Parse error, no at-rules supported inside @keyframes |
| if (allowedRules == NoRules || allowedRules == ApplyRules) |
| return nullptr; // Parse error, no at-rules with blocks supported inside declaration lists |
| |
| ASSERT(allowedRules <= RegularRules); |
| |
| switch (id) { |
| case CSSAtRuleMedia: |
| return consumeMediaRule(prelude, block); |
| case CSSAtRuleSupports: |
| return consumeSupportsRule(prelude, block); |
| #if ENABLE(CSS_DEVICE_ADAPTATION) |
| case CSSAtRuleViewport: |
| return consumeViewportRule(prelude, block); |
| #endif |
| case CSSAtRuleFontFace: |
| return consumeFontFaceRule(prelude, block); |
| case CSSAtRuleWebkitKeyframes: |
| return consumeKeyframesRule(true, prelude, block); |
| case CSSAtRuleKeyframes: |
| return consumeKeyframesRule(false, prelude, block); |
| case CSSAtRulePage: |
| return consumePageRule(prelude, block); |
| default: |
| return nullptr; // Parse error, unrecognised at-rule with block |
| } |
| } |
| |
| RefPtr<StyleRuleBase> CSSParserImpl::consumeQualifiedRule(CSSParserTokenRange& range, AllowedRulesType allowedRules) |
| { |
| const CSSParserToken* preludeStart = &range.peek(); |
| while (!range.atEnd() && range.peek().type() != LeftBraceToken) |
| range.consumeComponentValue(); |
| |
| if (range.atEnd()) |
| return nullptr; // Parse error, EOF instead of qualified rule block |
| |
| CSSParserTokenRange prelude = range.makeSubRange(preludeStart, &range.peek()); |
| CSSParserTokenRange block = range.consumeBlockCheckingForEditability(m_styleSheet.get()); |
| |
| if (allowedRules <= RegularRules) |
| return consumeStyleRule(prelude, block); |
| if (allowedRules == KeyframeRules) |
| return consumeKeyframeStyleRule(prelude, block); |
| |
| ASSERT_NOT_REACHED(); |
| return nullptr; |
| } |
| |
| // This may still consume tokens if it fails |
| static AtomString consumeStringOrURI(CSSParserTokenRange& range) |
| { |
| const CSSParserToken& token = range.peek(); |
| |
| if (token.type() == StringToken || token.type() == UrlToken) |
| return range.consumeIncludingWhitespace().value().toAtomString(); |
| |
| if (token.type() != FunctionToken || !equalIgnoringASCIICase(token.value(), "url")) |
| return AtomString(); |
| |
| CSSParserTokenRange contents = range.consumeBlock(); |
| const CSSParserToken& uri = contents.consumeIncludingWhitespace(); |
| if (uri.type() == BadStringToken || !contents.atEnd()) |
| return AtomString(); |
| return uri.value().toAtomString(); |
| } |
| |
| RefPtr<StyleRuleCharset> CSSParserImpl::consumeCharsetRule(CSSParserTokenRange prelude) |
| { |
| const CSSParserToken& string = prelude.consumeIncludingWhitespace(); |
| if (string.type() != StringToken || !prelude.atEnd()) |
| return nullptr; // Parse error, expected a single string |
| return StyleRuleCharset::create(); |
| } |
| |
| RefPtr<StyleRuleImport> CSSParserImpl::consumeImportRule(CSSParserTokenRange prelude) |
| { |
| AtomString uri(consumeStringOrURI(prelude)); |
| if (uri.isNull()) |
| return nullptr; // Parse error, expected string or URI |
| |
| if (m_observerWrapper) { |
| unsigned endOffset = m_observerWrapper->endOffset(prelude); |
| m_observerWrapper->observer().startRuleHeader(StyleRule::Import, m_observerWrapper->startOffset(prelude)); |
| m_observerWrapper->observer().endRuleHeader(endOffset); |
| m_observerWrapper->observer().startRuleBody(endOffset); |
| m_observerWrapper->observer().endRuleBody(endOffset); |
| } |
| |
| return StyleRuleImport::create(uri, MediaQueryParser::parseMediaQuerySet(prelude, MediaQueryParserContext(m_context)).releaseNonNull()); |
| } |
| |
| RefPtr<StyleRuleNamespace> CSSParserImpl::consumeNamespaceRule(CSSParserTokenRange prelude) |
| { |
| AtomString namespacePrefix; |
| if (prelude.peek().type() == IdentToken) |
| namespacePrefix = prelude.consumeIncludingWhitespace().value().toAtomString(); |
| |
| AtomString uri(consumeStringOrURI(prelude)); |
| if (uri.isNull() || !prelude.atEnd()) |
| return nullptr; // Parse error, expected string or URI |
| |
| return StyleRuleNamespace::create(namespacePrefix, uri); |
| } |
| |
| RefPtr<StyleRuleMedia> CSSParserImpl::consumeMediaRule(CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| if (m_deferredParser) |
| return StyleRuleMedia::create(MediaQueryParser::parseMediaQuerySet(prelude, MediaQueryParserContext(m_context)).releaseNonNull(), std::make_unique<DeferredStyleGroupRuleList>(block, *m_deferredParser)); |
| |
| Vector<RefPtr<StyleRuleBase>> rules; |
| |
| if (m_observerWrapper) { |
| m_observerWrapper->observer().startRuleHeader(StyleRule::Media, m_observerWrapper->startOffset(prelude)); |
| m_observerWrapper->observer().endRuleHeader(m_observerWrapper->endOffset(prelude)); |
| m_observerWrapper->observer().startRuleBody(m_observerWrapper->previousTokenStartOffset(block)); |
| } |
| |
| consumeRuleList(block, RegularRuleList, [&rules](RefPtr<StyleRuleBase> rule) { |
| rules.append(rule); |
| }); |
| rules.shrinkToFit(); |
| |
| if (m_observerWrapper) |
| m_observerWrapper->observer().endRuleBody(m_observerWrapper->endOffset(block)); |
| |
| return StyleRuleMedia::create(MediaQueryParser::parseMediaQuerySet(prelude, MediaQueryParserContext(m_context)).releaseNonNull(), rules); |
| } |
| |
| RefPtr<StyleRuleSupports> CSSParserImpl::consumeSupportsRule(CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| CSSSupportsParser::SupportsResult supported = CSSSupportsParser::supportsCondition(prelude, *this, CSSSupportsParser::ForAtRule); |
| if (supported == CSSSupportsParser::Invalid) |
| return nullptr; // Parse error, invalid @supports condition |
| |
| if (m_deferredParser) |
| return StyleRuleSupports::create(prelude.serialize().stripWhiteSpace(), supported, std::make_unique<DeferredStyleGroupRuleList>(block, *m_deferredParser)); |
| |
| if (m_observerWrapper) { |
| m_observerWrapper->observer().startRuleHeader(StyleRule::Supports, m_observerWrapper->startOffset(prelude)); |
| m_observerWrapper->observer().endRuleHeader(m_observerWrapper->endOffset(prelude)); |
| m_observerWrapper->observer().startRuleBody(m_observerWrapper->previousTokenStartOffset(block)); |
| } |
| |
| Vector<RefPtr<StyleRuleBase>> rules; |
| consumeRuleList(block, RegularRuleList, [&rules](RefPtr<StyleRuleBase> rule) { |
| rules.append(rule); |
| }); |
| rules.shrinkToFit(); |
| |
| if (m_observerWrapper) |
| m_observerWrapper->observer().endRuleBody(m_observerWrapper->endOffset(block)); |
| |
| return StyleRuleSupports::create(prelude.serialize().stripWhiteSpace(), supported, rules); |
| } |
| |
| #if ENABLE(CSS_DEVICE_ADAPTATION) |
| RefPtr<StyleRuleViewport> CSSParserImpl::consumeViewportRule(CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| if (!prelude.atEnd()) |
| return nullptr; // Parser error; @viewport prelude should be empty |
| |
| if (m_observerWrapper) { |
| unsigned endOffset = m_observerWrapper->endOffset(prelude); |
| m_observerWrapper->observer().startRuleHeader(StyleRule::Viewport, m_observerWrapper->startOffset(prelude)); |
| m_observerWrapper->observer().endRuleHeader(endOffset); |
| m_observerWrapper->observer().startRuleBody(endOffset); |
| m_observerWrapper->observer().endRuleBody(endOffset); |
| } |
| |
| consumeDeclarationList(block, StyleRule::Viewport); |
| return StyleRuleViewport::create(createStyleProperties(m_parsedProperties, CSSViewportRuleMode)); |
| } |
| #endif |
| |
| RefPtr<StyleRuleFontFace> CSSParserImpl::consumeFontFaceRule(CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| if (!prelude.atEnd()) |
| return nullptr; // Parse error; @font-face prelude should be empty |
| |
| if (m_observerWrapper) { |
| unsigned endOffset = m_observerWrapper->endOffset(prelude); |
| m_observerWrapper->observer().startRuleHeader(StyleRule::FontFace, m_observerWrapper->startOffset(prelude)); |
| m_observerWrapper->observer().endRuleHeader(endOffset); |
| m_observerWrapper->observer().startRuleBody(endOffset); |
| m_observerWrapper->observer().endRuleBody(endOffset); |
| } |
| |
| consumeDeclarationList(block, StyleRule::FontFace); |
| return StyleRuleFontFace::create(createStyleProperties(m_parsedProperties, m_context.mode)); |
| } |
| |
| RefPtr<StyleRuleKeyframes> CSSParserImpl::consumeKeyframesRule(bool webkitPrefixed, CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| CSSParserTokenRange rangeCopy = prelude; // For inspector callbacks |
| const CSSParserToken& nameToken = prelude.consumeIncludingWhitespace(); |
| if (!prelude.atEnd()) |
| return nullptr; // Parse error; expected single non-whitespace token in @keyframes header |
| |
| String name; |
| if (nameToken.type() == IdentToken) { |
| name = nameToken.value().toString(); |
| } else if (nameToken.type() == StringToken && webkitPrefixed) |
| name = nameToken.value().toString(); |
| else |
| return nullptr; // Parse error; expected ident token in @keyframes header |
| |
| if (m_deferredParser) |
| return StyleRuleKeyframes::create(name, std::make_unique<DeferredStyleGroupRuleList>(block, *m_deferredParser)); |
| |
| if (m_observerWrapper) { |
| m_observerWrapper->observer().startRuleHeader(StyleRule::Keyframes, m_observerWrapper->startOffset(rangeCopy)); |
| m_observerWrapper->observer().endRuleHeader(m_observerWrapper->endOffset(prelude)); |
| m_observerWrapper->observer().startRuleBody(m_observerWrapper->previousTokenStartOffset(block)); |
| m_observerWrapper->observer().endRuleBody(m_observerWrapper->endOffset(block)); |
| } |
| |
| RefPtr<StyleRuleKeyframes> keyframeRule = StyleRuleKeyframes::create(name); |
| consumeRuleList(block, KeyframesRuleList, [keyframeRule](const RefPtr<StyleRuleBase>& keyframe) { |
| keyframeRule->parserAppendKeyframe(downcast<const StyleRuleKeyframe>(keyframe.get())); |
| }); |
| |
| // FIXME-NEWPARSER: Find out why this is done. Behavior difference when prefixed? |
| // keyframeRule->setVendorPrefixed(webkitPrefixed); |
| return keyframeRule; |
| } |
| |
| RefPtr<StyleRulePage> CSSParserImpl::consumePageRule(CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| CSSSelectorList selectorList = parsePageSelector(prelude, m_styleSheet.get()); |
| if (!selectorList.isValid()) |
| return nullptr; // Parse error, invalid @page selector |
| |
| if (m_observerWrapper) { |
| unsigned endOffset = m_observerWrapper->endOffset(prelude); |
| m_observerWrapper->observer().startRuleHeader(StyleRule::Page, m_observerWrapper->startOffset(prelude)); |
| m_observerWrapper->observer().endRuleHeader(endOffset); |
| } |
| |
| consumeDeclarationList(block, StyleRule::Style); |
| |
| return StyleRulePage::create(createStyleProperties(m_parsedProperties, m_context.mode), WTFMove(selectorList)); |
| } |
| |
| // FIXME-NEWPARSER: Support "apply" |
| /*void CSSParserImpl::consumeApplyRule(CSSParserTokenRange prelude) |
| { |
| const CSSParserToken& ident = prelude.consumeIncludingWhitespace(); |
| if (!prelude.atEnd() || !CSSVariableParser::isValidVariableName(ident)) |
| return; // Parse error, expected a single custom property name |
| m_parsedProperties.append(CSSProperty( |
| CSSPropertyApplyAtRule, |
| *CSSCustomIdentValue::create(ident.value().toString()))); |
| } |
| */ |
| |
| RefPtr<StyleRuleKeyframe> CSSParserImpl::consumeKeyframeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| std::unique_ptr<Vector<double>> keyList = consumeKeyframeKeyList(prelude); |
| if (!keyList) |
| return nullptr; |
| |
| if (m_observerWrapper) { |
| m_observerWrapper->observer().startRuleHeader(StyleRule::Keyframe, m_observerWrapper->startOffset(prelude)); |
| m_observerWrapper->observer().endRuleHeader(m_observerWrapper->endOffset(prelude)); |
| } |
| |
| consumeDeclarationList(block, StyleRule::Keyframe); |
| return StyleRuleKeyframe::create(WTFMove(keyList), createStyleProperties(m_parsedProperties, m_context.mode)); |
| } |
| |
| static void observeSelectors(CSSParserObserverWrapper& wrapper, CSSParserTokenRange selectors) |
| { |
| // This is easier than hooking into the CSSSelectorParser |
| selectors.consumeWhitespace(); |
| CSSParserTokenRange originalRange = selectors; |
| wrapper.observer().startRuleHeader(StyleRule::Style, wrapper.startOffset(originalRange)); |
| |
| while (!selectors.atEnd()) { |
| const CSSParserToken* selectorStart = &selectors.peek(); |
| while (!selectors.atEnd() && selectors.peek().type() != CommaToken) |
| selectors.consumeComponentValue(); |
| CSSParserTokenRange selector = selectors.makeSubRange(selectorStart, &selectors.peek()); |
| selectors.consumeIncludingWhitespace(); |
| |
| wrapper.observer().observeSelector(wrapper.startOffset(selector), wrapper.endOffset(selector)); |
| } |
| |
| wrapper.observer().endRuleHeader(wrapper.endOffset(originalRange)); |
| } |
| |
| RefPtr<StyleRule> CSSParserImpl::consumeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block) |
| { |
| CSSSelectorList selectorList = CSSSelectorParser::parseSelector(prelude, m_context, m_styleSheet.get()); |
| if (!selectorList.isValid()) |
| return nullptr; // Parse error, invalid selector list |
| |
| if (m_observerWrapper) |
| observeSelectors(*m_observerWrapper, prelude); |
| |
| if (m_deferredParser) { |
| // If a rule is empty (i.e., only whitespace), don't bother using |
| // deferred parsing. This allows the empty rule optimization in ElementRuleCollector |
| // to continue to work. Note we don't have to consider CommentTokens, since those |
| // are stripped out. |
| CSSParserTokenRange blockCopy = block; |
| blockCopy.consumeWhitespace(); |
| if (!blockCopy.atEnd()) { |
| return StyleRule::create(createDeferredStyleProperties(block), m_context.hasDocumentSecurityOrigin, WTFMove(selectorList)); |
| } |
| } |
| |
| consumeDeclarationList(block, StyleRule::Style); |
| return StyleRule::create(createStyleProperties(m_parsedProperties, m_context.mode), m_context.hasDocumentSecurityOrigin, WTFMove(selectorList)); |
| } |
| |
| void CSSParserImpl::consumeDeclarationList(CSSParserTokenRange range, StyleRule::Type ruleType) |
| { |
| ASSERT(m_parsedProperties.isEmpty()); |
| |
| bool useObserver = m_observerWrapper && (ruleType == StyleRule::Style || ruleType == StyleRule::Keyframe); |
| if (useObserver) { |
| m_observerWrapper->observer().startRuleBody(m_observerWrapper->previousTokenStartOffset(range)); |
| m_observerWrapper->skipCommentsBefore(range, true); |
| } |
| |
| while (!range.atEnd()) { |
| switch (range.peek().type()) { |
| case WhitespaceToken: |
| case SemicolonToken: |
| range.consume(); |
| break; |
| case IdentToken: { |
| const CSSParserToken* declarationStart = &range.peek(); |
| |
| if (useObserver) |
| m_observerWrapper->yieldCommentsBefore(range); |
| |
| while (!range.atEnd() && range.peek().type() != SemicolonToken) |
| range.consumeComponentValue(); |
| |
| consumeDeclaration(range.makeSubRange(declarationStart, &range.peek()), ruleType); |
| |
| if (useObserver) |
| m_observerWrapper->skipCommentsBefore(range, false); |
| break; |
| } |
| case AtKeywordToken: { |
| // FIXME-NEWPARSER: Support apply |
| AllowedRulesType allowedRules = /* ruleType == StyleRule::Style && RuntimeEnabledFeatures::cssApplyAtRulesEnabled() ? ApplyRules :*/ NoRules; |
| RefPtr<StyleRuleBase> rule = consumeAtRule(range, allowedRules); |
| ASSERT_UNUSED(rule, !rule); |
| break; |
| } |
| default: // Parse error, unexpected token in declaration list |
| while (!range.atEnd() && range.peek().type() != SemicolonToken) |
| range.consumeComponentValue(); |
| break; |
| } |
| } |
| |
| // Yield remaining comments |
| if (useObserver) { |
| m_observerWrapper->yieldCommentsBefore(range); |
| m_observerWrapper->observer().endRuleBody(m_observerWrapper->endOffset(range)); |
| } |
| } |
| |
| void CSSParserImpl::consumeDeclaration(CSSParserTokenRange range, StyleRule::Type ruleType) |
| { |
| CSSParserTokenRange rangeCopy = range; // For inspector callbacks |
| |
| ASSERT(range.peek().type() == IdentToken); |
| const CSSParserToken& token = range.consumeIncludingWhitespace(); |
| CSSPropertyID propertyID = token.parseAsCSSPropertyID(); |
| if (range.consume().type() != ColonToken) |
| return; // Parse error |
| |
| bool important = false; |
| const CSSParserToken* declarationValueEnd = range.end(); |
| const CSSParserToken* last = range.end() - 1; |
| while (last->type() == WhitespaceToken) |
| --last; |
| if (last->type() == IdentToken && equalIgnoringASCIICase(last->value(), "important")) { |
| --last; |
| while (last->type() == WhitespaceToken) |
| --last; |
| if (last->type() == DelimiterToken && last->delimiter() == '!') { |
| important = true; |
| declarationValueEnd = last; |
| } |
| } |
| |
| size_t propertiesCount = m_parsedProperties.size(); |
| if (propertyID == CSSPropertyInvalid && CSSVariableParser::isValidVariableName(token)) { |
| AtomString variableName = token.value().toAtomString(); |
| consumeCustomPropertyValue(range.makeSubRange(&range.peek(), declarationValueEnd), variableName, important); |
| } |
| |
| if (important && (ruleType == StyleRule::FontFace || ruleType == StyleRule::Keyframe)) |
| return; |
| |
| if (propertyID != CSSPropertyInvalid) |
| consumeDeclarationValue(range.makeSubRange(&range.peek(), declarationValueEnd), propertyID, important, ruleType); |
| |
| if (m_observerWrapper && (ruleType == StyleRule::Style || ruleType == StyleRule::Keyframe)) { |
| m_observerWrapper->observer().observeProperty( |
| m_observerWrapper->startOffset(rangeCopy), m_observerWrapper->endOffset(rangeCopy), |
| important, m_parsedProperties.size() != propertiesCount); |
| } |
| } |
| |
| void CSSParserImpl::consumeCustomPropertyValue(CSSParserTokenRange range, const AtomString& variableName, bool important) |
| { |
| if (RefPtr<CSSCustomPropertyValue> value = CSSVariableParser::parseDeclarationValue(variableName, range, m_context)) |
| m_parsedProperties.append(CSSProperty(CSSPropertyCustom, WTFMove(value), important)); |
| } |
| |
| void CSSParserImpl::consumeDeclarationValue(CSSParserTokenRange range, CSSPropertyID propertyID, bool important, StyleRule::Type ruleType) |
| { |
| CSSPropertyParser::parseValue(propertyID, important, range, m_context, m_parsedProperties, ruleType); |
| } |
| |
| std::unique_ptr<Vector<double>> CSSParserImpl::consumeKeyframeKeyList(CSSParserTokenRange range) |
| { |
| std::unique_ptr<Vector<double>> result = std::unique_ptr<Vector<double>>(new Vector<double>); |
| while (true) { |
| range.consumeWhitespace(); |
| const CSSParserToken& token = range.consumeIncludingWhitespace(); |
| if (token.type() == PercentageToken && token.numericValue() >= 0 && token.numericValue() <= 100) |
| result->append(token.numericValue() / 100); |
| else if (token.type() == IdentToken && equalIgnoringASCIICase(token.value(), "from")) |
| result->append(0); |
| else if (token.type() == IdentToken && equalIgnoringASCIICase(token.value(), "to")) |
| result->append(1); |
| else |
| return nullptr; // Parser error, invalid value in keyframe selector |
| if (range.atEnd()) |
| return result; |
| if (range.consume().type() != CommaToken) |
| return nullptr; // Parser error |
| } |
| } |
| |
| } // namespace WebCore |