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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 "CSSTokenizer.h"
#include <wtf/Forward.h>
#include <wtf/text/ParsingUtilities.h>
namespace WebCore {
class StyleSheetContents;
// 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:
CSSParserTokenRange() = default;
CSSParserTokenRange(std::span<const CSSParserToken> span)
: m_tokens(span)
{ }
template<size_t inlineBuffer>
CSSParserTokenRange(const Vector<CSSParserToken, inlineBuffer>& vector)
: CSSParserTokenRange(vector.span())
{ }
CSSParserTokenRange rangeUntil(const CSSParserTokenRange& end) const { return span().first(end.begin() - begin()); }
bool atEnd() const { return m_tokens.empty(); }
const CSSParserToken* begin() const { return std::to_address(m_tokens.begin()); }
const CSSParserToken* end() const { return std::to_address(m_tokens.end()); }
size_t size() const { return m_tokens.size(); }
const CSSParserToken& peek(size_t offset = 0) const
{
if (offset < m_tokens.size())
return m_tokens[offset];
return eofToken();
}
const CSSParserToken& consume()
{
if (m_tokens.empty())
return eofToken();
return WTF::consume(m_tokens);
}
const CSSParserToken& consumeIncludingWhitespace()
{
auto& result = consume();
consumeWhitespace();
return result;
}
// The returned range doesn't include the brackets
CSSParserTokenRange consumeBlock();
CSSParserTokenRange consumeBlockCheckingForEditability(StyleSheetContents*);
void consumeComponentValue();
void consumeWhitespace()
{
size_t i = 0;
for (; i < m_tokens.size() && CSSTokenizer::isWhitespace(m_tokens[i].type()); ++i) { }
skip(m_tokens, i);
}
void trimTrailingWhitespace();
const CSSParserToken& consumeLast();
CSSParserTokenRange consumeAll() { return { std::exchange(m_tokens, std::span<const CSSParserToken> { }) }; }
String serialize(CSSParserToken::SerializationMode = CSSParserToken::SerializationMode::Normal) const;
std::span<const CSSParserToken> span() const { return m_tokens; }
static CSSParserToken& eofToken();
private:
std::span<const CSSParserToken> m_tokens;
};
} // namespace WebCore
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