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136 lines
5.1 KiB
C++
136 lines
5.1 KiB
C++
/*
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* Copyright (C) 2010 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
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* are met:
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY 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 OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef HTMLParserIdioms_h
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#define HTMLParserIdioms_h
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#include "core/dom/QualifiedName.h"
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#include "platform/Decimal.h"
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#include "wtf/Forward.h"
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#include "wtf/text/WTFString.h"
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namespace WTF {
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class TextEncoding;
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}
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namespace blink {
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// Strip leading and trailing whitespace as defined by the HTML specification.
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String stripLeadingAndTrailingHTMLSpaces(const String&);
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template<size_t inlineCapacity>
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String stripLeadingAndTrailingHTMLSpaces(const Vector<UChar, inlineCapacity>& vector)
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{
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return stripLeadingAndTrailingHTMLSpaces(StringImpl::create8BitIfPossible(vector));
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}
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// An implementation of the HTML specification's algorithm to convert a number to a string for number and range types.
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String serializeForNumberType(const Decimal&);
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String serializeForNumberType(double);
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// Convert the specified string to a decimal/double. If the conversion fails, the return value is fallback value or NaN if not specified.
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// Leading or trailing illegal characters cause failure, as does passing an empty string.
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// The double* parameter may be 0 to check if the string can be parsed without getting the result.
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Decimal parseToDecimalForNumberType(const String&, const Decimal& fallbackValue = Decimal::nan());
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double parseToDoubleForNumberType(const String&, double fallbackValue = std::numeric_limits<double>::quiet_NaN());
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// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers
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bool parseHTMLInteger(const String&, int&);
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// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-non-negative-integers
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bool parseHTMLNonNegativeInteger(const String&, unsigned&);
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typedef Vector<pair<String, String> > HTMLAttributeList;
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// The returned encoding might not be valid.
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WTF::TextEncoding encodingFromMetaAttributes(const HTMLAttributeList&);
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// Space characters as defined by the HTML specification.
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template<typename CharType>
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inline bool isHTMLSpace(CharType character)
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{
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// Histogram from Apple's page load test combined with some ad hoc browsing some other test suites.
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//
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// 82%: 216330 non-space characters, all > U+0020
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// 11%: 30017 plain space characters, U+0020
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// 5%: 12099 newline characters, U+000A
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// 2%: 5346 tab characters, U+0009
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//
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// No other characters seen. No U+000C or U+000D, and no other control characters.
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// Accordingly, we check for non-spaces first, then space, then newline, then tab, then the other characters.
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return character <= ' ' && (character == ' ' || character == '\n' || character == '\t' || character == '\r' || character == '\f');
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}
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template<typename CharType>
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inline bool isComma(CharType character)
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{
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return character == ',';
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}
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template<typename CharType>
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inline bool isHTMLSpaceOrComma(CharType character)
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{
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return isComma(character) || isHTMLSpace(character);
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}
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inline bool isHTMLLineBreak(UChar character)
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{
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return character <= '\r' && (character == '\n' || character == '\r');
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}
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template<typename CharType>
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inline bool isNotHTMLSpace(CharType character)
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{
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return !isHTMLSpace<CharType>(character);
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}
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bool threadSafeMatch(const QualifiedName&, const QualifiedName&);
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bool threadSafeMatch(const String&, const QualifiedName&);
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enum CharacterWidth {
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Likely8Bit,
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Force8Bit,
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Force16Bit
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};
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String attemptStaticStringCreation(const LChar*, size_t);
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String attemptStaticStringCreation(const UChar*, size_t, CharacterWidth);
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template<size_t inlineCapacity>
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inline static String attemptStaticStringCreation(const Vector<UChar, inlineCapacity>& vector, CharacterWidth width)
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{
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return attemptStaticStringCreation(vector.data(), vector.size(), width);
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}
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inline static String attemptStaticStringCreation(const String str)
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{
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if (!str.is8Bit())
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return attemptStaticStringCreation(str.characters16(), str.length(), Force16Bit);
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return attemptStaticStringCreation(str.characters8(), str.length());
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}
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}
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#endif
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