117 lines
4.5 KiB
C++
117 lines
4.5 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Copyright (C) 2016 Apple Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "config.h"
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#include "CSSParserTokenRange.h"
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#include "StyleSheetContents.h"
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#include <wtf/NeverDestroyed.h>
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#include <wtf/text/StringBuilder.h>
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namespace WebCore {
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CSSParserToken& CSSParserTokenRange::eofToken()
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{
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static NeverDestroyed<CSSParserToken> eofToken(EOFToken);
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return eofToken.get();
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}
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CSSParserTokenRange CSSParserTokenRange::makeSubRange(const CSSParserToken* first, const CSSParserToken* last) const
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{
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if (first == &eofToken())
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first = m_last;
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if (last == &eofToken())
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last = m_last;
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ASSERT(first <= last);
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return CSSParserTokenRange(first, last);
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}
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CSSParserTokenRange CSSParserTokenRange::consumeBlock()
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{
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ASSERT(peek().getBlockType() == CSSParserToken::BlockStart);
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const CSSParserToken* start = &peek() + 1;
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unsigned nestingLevel = 0;
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do {
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const CSSParserToken& token = consume();
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if (token.getBlockType() == CSSParserToken::BlockStart)
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nestingLevel++;
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else if (token.getBlockType() == CSSParserToken::BlockEnd)
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nestingLevel--;
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} while (nestingLevel && m_first < m_last);
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if (nestingLevel)
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return makeSubRange(start, m_first); // Ended at EOF
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return makeSubRange(start, m_first - 1);
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}
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CSSParserTokenRange CSSParserTokenRange::consumeBlockCheckingForEditability(StyleSheetContents* styleSheet)
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{
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ASSERT(peek().getBlockType() == CSSParserToken::BlockStart);
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const auto* start = &peek() + 1;
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unsigned nestingLevel = 0;
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do {
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const auto& token = consume();
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if (token.getBlockType() == CSSParserToken::BlockStart)
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nestingLevel++;
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else if (token.getBlockType() == CSSParserToken::BlockEnd)
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nestingLevel--;
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if (styleSheet && !styleSheet->usesStyleBasedEditability() && token.type() == IdentToken && equalLettersIgnoringASCIICase(token.value(), "-webkit-user-modify"))
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styleSheet->parserSetUsesStyleBasedEditability();
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} while (nestingLevel && m_first < m_last);
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if (nestingLevel)
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return makeSubRange(start, m_first); // Ended at EOF
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return makeSubRange(start, m_first - 1);
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}
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void CSSParserTokenRange::consumeComponentValue()
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{
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// FIXME: This is going to do multiple passes over large sections of a stylesheet.
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// We should consider optimising this by precomputing where each block ends.
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unsigned nestingLevel = 0;
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do {
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const CSSParserToken& token = consume();
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if (token.getBlockType() == CSSParserToken::BlockStart)
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nestingLevel++;
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else if (token.getBlockType() == CSSParserToken::BlockEnd)
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nestingLevel--;
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} while (nestingLevel && m_first < m_last);
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}
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String CSSParserTokenRange::serialize() const
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{
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StringBuilder builder;
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for (const CSSParserToken* it = m_first; it < m_last; ++it)
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it->serialize(builder, it + 1 == m_last ? nullptr : it + 1);
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return builder.toString();
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}
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} // namespace WebCore
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