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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 "CSSParserToken.h"
#include <wtf/Vector.h>
namespace WebCore {
// 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 CSSParserTokenRange {
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 eofToken();
return *(m_first + offset);
}
const CSSParserToken& consume()
{
if (m_first == m_last)
return eofToken();
return *m_first++;
}
const CSSParserToken& consumeIncludingWhitespace()
{
const CSSParserToken& result = consume();
consumeWhitespace();
return result;
}
// The returned range doesn't include the brackets
CSSParserTokenRange consumeBlock();
CSSParserTokenRange consumeBlockCheckingForEditability(StyleSheetContents*);
void consumeComponentValue();
void consumeWhitespace()
{
while (peek().type() == WhitespaceToken)
++m_first;
}
String serialize() const;
const CSSParserToken* begin() const { return m_first; }
static CSSParserToken& eofToken();
private:
CSSParserTokenRange(const CSSParserToken* first, const CSSParserToken* last)
: m_first(first)
, m_last(last)
{ }
const CSSParserToken* m_first;
const CSSParserToken* m_last;
};
} // namespace WebCore
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