webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 108 insertions, 0 deletions

diff --git a/Source/WebCore/css/parser/CSSSelectorParser.h b/Source/WebCore/css/parser/CSSSelectorParser.h
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+++ b/Source/WebCore/css/parser/CSSSelectorParser.h
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+// 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.
+
+#pragma once
+
+#include "CSSParserSelector.h"
+#include "CSSParserTokenRange.h"
+#include <memory>
+
+namespace WebCore {
+
+struct CSSParserContext;
+class CSSSelectorList;
+class StyleSheetContents;
+
+// FIXME: We should consider building CSSSelectors directly instead of using
+// the intermediate CSSParserSelector.
+class CSSSelectorParser {
+public:
+    static CSSSelectorList parseSelector(CSSParserTokenRange, const CSSParserContext&, StyleSheetContents*);
+
+    static bool consumeANPlusB(CSSParserTokenRange&, std::pair<int, int>&);
+
+private:
+    CSSSelectorParser(const CSSParserContext&, StyleSheetContents*);
+
+    // These will all consume trailing comments if successful
+
+    CSSSelectorList consumeComplexSelectorList(CSSParserTokenRange&);
+    CSSSelectorList consumeCompoundSelectorList(CSSParserTokenRange&);
+
+    std::unique_ptr<CSSParserSelector> consumeComplexSelector(CSSParserTokenRange&);
+    std::unique_ptr<CSSParserSelector> consumeCompoundSelector(CSSParserTokenRange&);
+    // This doesn't include element names, since they're handled specially
+    std::unique_ptr<CSSParserSelector> consumeSimpleSelector(CSSParserTokenRange&);
+
+    bool consumeName(CSSParserTokenRange&, AtomicString& name, AtomicString& namespacePrefix);
+
+    // These will return nullptr when the selector is invalid
+    std::unique_ptr<CSSParserSelector> consumeId(CSSParserTokenRange&);
+    std::unique_ptr<CSSParserSelector> consumeClass(CSSParserTokenRange&);
+    std::unique_ptr<CSSParserSelector> consumePseudo(CSSParserTokenRange&);
+    std::unique_ptr<CSSParserSelector> consumeAttribute(CSSParserTokenRange&);
+
+    CSSSelector::RelationType consumeCombinator(CSSParserTokenRange&);
+    CSSSelector::Match consumeAttributeMatch(CSSParserTokenRange&);
+    CSSSelector::AttributeMatchType consumeAttributeFlags(CSSParserTokenRange&);
+
+    const AtomicString& defaultNamespace() const;
+    const AtomicString& determineNamespace(const AtomicString& prefix);
+    void prependTypeSelectorIfNeeded(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector*);
+    static std::unique_ptr<CSSParserSelector> addSimpleSelectorToCompound(std::unique_ptr<CSSParserSelector> compoundSelector, std::unique_ptr<CSSParserSelector> simpleSelector);
+    static std::unique_ptr<CSSParserSelector> splitCompoundAtImplicitShadowCrossingCombinator(std::unique_ptr<CSSParserSelector> compoundSelector, const CSSParserContext&);
+
+    const CSSParserContext& m_context;
+    RefPtr<StyleSheetContents> m_styleSheet; // FIXME: Should be const
+
+    bool m_failedParsing = false;
+    bool m_disallowPseudoElements = false;
+
+    class DisallowPseudoElementsScope {
+        WTF_MAKE_NONCOPYABLE(DisallowPseudoElementsScope);
+    public:
+        DisallowPseudoElementsScope(CSSSelectorParser* parser)
+            : m_parser(parser), m_wasDisallowed(m_parser->m_disallowPseudoElements)
+        {
+            m_parser->m_disallowPseudoElements = true;
+        }
+
+        ~DisallowPseudoElementsScope()
+        {
+            m_parser->m_disallowPseudoElements = m_wasDisallowed;
+        }
+
+    private:
+        CSSSelectorParser* m_parser;
+        bool m_wasDisallowed;
+    };
+};
+
+} // namespace WebCore
+