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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CSSParserTokenRange_h
#define CSSParserTokenRange_h
#include "core/CoreExport.h"
#include "core/css/parser/CSSParserToken.h"
#include "wtf/Allocator.h"
#include "wtf/Vector.h"
namespace blink {
CORE_EXPORT extern const CSSParserToken& staticEOFToken;
// A CSSParserTokenRange is an iterator over a subrange of a vector of
// CSSParserTokens. Accessing outside of the range will return an endless stream
// of EOF tokens. This class refers to half-open intervals [first, last).
class CORE_EXPORT CSSParserTokenRange {
DISALLOW_NEW();
public:
template <size_t inlineBuffer>
CSSParserTokenRange(const Vector<CSSParserToken, inlineBuffer>& vector)
: m_first(vector.begin()), m_last(vector.end()) {}
// This should be called on a range with tokens returned by that range.
CSSParserTokenRange makeSubRange(const CSSParserToken* first,
const CSSParserToken* last) const;
bool atEnd() const { return m_first == m_last; }
const CSSParserToken* end() const { return m_last; }
const CSSParserToken& peek(unsigned offset = 0) const {
if (m_first + offset >= m_last)
return staticEOFToken;
return *(m_first + offset);
}
const CSSParserToken& consume() {
if (m_first == m_last)
return staticEOFToken;
return *m_first++;
}
const CSSParserToken& consumeIncludingWhitespace() {
const CSSParserToken& result = consume();
consumeWhitespace();
return result;
}
// The returned range doesn't include the brackets
CSSParserTokenRange consumeBlock();
void consumeComponentValue();
void consumeWhitespace() {
while (peek().type() == WhitespaceToken)
++m_first;
}
String serialize() const;
const CSSParserToken* begin() const { return m_first; }
static void initStaticEOFToken();
private:
CSSParserTokenRange(const CSSParserToken* first, const CSSParserToken* last)
: m_first(first), m_last(last) {}
const CSSParserToken* m_first;
const CSSParserToken* m_last;
};
} // namespace blink
#endif // CSSParserTokenRange_h
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