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// Copyright 2015 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 "CSSParserToken.h"
#include "CSSParserTokenRange.h"
#include <wtf/text/WTFString.h>
namespace WebCore {
class CSSParserTokenRange;
class CSSVariableData : public RefCounted<CSSVariableData> {
WTF_MAKE_NONCOPYABLE(CSSVariableData);
WTF_MAKE_FAST_ALLOCATED;
public:
static Ref<CSSVariableData> create(const CSSParserTokenRange& range, bool needsVariableResolution = true)
{
return adoptRef(*new CSSVariableData(range, needsVariableResolution));
}
static Ref<CSSVariableData> createResolved(const Vector<CSSParserToken>& resolvedTokens, const CSSVariableData& unresolvedData)
{
return adoptRef(*new CSSVariableData(resolvedTokens, unresolvedData.m_backingString));
}
CSSParserTokenRange tokenRange() { return m_tokens; }
const Vector<CSSParserToken>& tokens() const { return m_tokens; }
bool operator==(const CSSVariableData& other) const;
bool needsVariableResolution() const { return m_needsVariableResolution; }
bool checkVariablesForCycles(const AtomicString& name, CustomPropertyValueMap&, HashSet<AtomicString>& seenProperties, HashSet<AtomicString>& invalidProperties) const;
RefPtr<CSSVariableData> resolveVariableReferences(const CustomPropertyValueMap& customProperties) const;
bool resolveTokenRange(const CustomPropertyValueMap&, CSSParserTokenRange, Vector<CSSParserToken>&) const;
private:
CSSVariableData(const CSSParserTokenRange&, bool needsVariableResolution);
// We can safely copy the tokens (which have raw pointers to substrings) because
// StylePropertySets contain references to CSSCustomPropertyValues, which
// point to the unresolved CSSVariableData values that own the backing strings
// this will potentially reference.
CSSVariableData(const Vector<CSSParserToken>& resolvedTokens, String backingString)
: m_backingString(backingString)
, m_tokens(resolvedTokens)
, m_needsVariableResolution(false)
{ }
void consumeAndUpdateTokens(const CSSParserTokenRange&);
template<typename CharacterType> void updateTokens(const CSSParserTokenRange&);
bool checkVariablesForCyclesWithRange(CSSParserTokenRange, CustomPropertyValueMap&, HashSet<AtomicString>& seenProperties, HashSet<AtomicString>& invalidProperties) const;
bool resolveVariableReference(const CustomPropertyValueMap&, CSSParserTokenRange, Vector<CSSParserToken>&) const;
bool resolveVariableFallback(const CustomPropertyValueMap&, CSSParserTokenRange, Vector<CSSParserToken>&) const;
String m_backingString;
Vector<CSSParserToken> m_tokens;
const bool m_needsVariableResolution;
// FIXME-NEWPARSER: We want to cache StyleProperties once we support @apply.
};
} // namespace WebCore
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