// 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 "CSSParserTokenRange.h" #include <wtf/text/WTFString.h> namespace WebCore { class Document; struct SizesCalcValue { double value; bool isLength; UChar operation; SizesCalcValue() : value(0) , isLength(false) , operation(0) { } SizesCalcValue(double numericValue, bool length) : value(numericValue) , isLength(length) , operation(0) { } }; class SizesCalcParser { public: SizesCalcParser(CSSParserTokenRange, const Document&); float result() const; bool isValid() const { return m_isValid; } private: bool calcToReversePolishNotation(CSSParserTokenRange); bool calculate(); void appendNumber(const CSSParserToken&); bool appendLength(const CSSParserToken&); bool handleOperator(Vector<CSSParserToken>& stack, const CSSParserToken&); void appendOperator(const CSSParserToken&); Vector<SizesCalcValue> m_valueList; bool m_isValid; float m_result; const Document& m_document; }; } // namespace WebCore