/* * Copyright (C) 2010 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: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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. */ #ifndef HTMLParserIdioms_h #define HTMLParserIdioms_h #include "core/dom/QualifiedName.h" #include "platform/Decimal.h" #include "wtf/Forward.h" #include "wtf/text/WTFString.h" namespace WTF { class TextEncoding; } namespace WebCore { // Space characters as defined by the HTML specification. bool isHTMLSpace(UChar); bool isHTMLLineBreak(UChar); bool isNotHTMLSpace(UChar); // Strip leading and trailing whitespace as defined by the HTML specification. String stripLeadingAndTrailingHTMLSpaces(const String&); template<size_t inlineCapacity> String stripLeadingAndTrailingHTMLSpaces(const Vector<UChar, inlineCapacity>& vector) { return stripLeadingAndTrailingHTMLSpaces(StringImpl::create8BitIfPossible(vector)); } // An implementation of the HTML specification's algorithm to convert a number to a string for number and range types. String serializeForNumberType(const Decimal&); String serializeForNumberType(double); // Convert the specified string to a decimal/double. If the conversion fails, the return value is fallback value or NaN if not specified. // Leading or trailing illegal characters cause failure, as does passing an empty string. // The double* parameter may be 0 to check if the string can be parsed without getting the result. Decimal parseToDecimalForNumberType(const String&, const Decimal& fallbackValue = Decimal::nan()); double parseToDoubleForNumberType(const String&, double fallbackValue = std::numeric_limits<double>::quiet_NaN()); // http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers bool parseHTMLInteger(const String&, int&); // http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-non-negative-integers bool parseHTMLNonNegativeInteger(const String&, unsigned&); typedef Vector<pair<String, String> > HTMLAttributeList; // The returned encoding might not be valid. WTF::TextEncoding encodingFromMetaAttributes(const HTMLAttributeList&); // Inline implementations of some of the functions declared above. template<typename CharType> inline bool isHTMLSpace(CharType character) { // Histogram from Apple's page load test combined with some ad hoc browsing some other test suites. // // 82%: 216330 non-space characters, all > U+0020 // 11%: 30017 plain space characters, U+0020 // 5%: 12099 newline characters, U+000A // 2%: 5346 tab characters, U+0009 // // No other characters seen. No U+000C or U+000D, and no other control characters. // Accordingly, we check for non-spaces first, then space, then newline, then tab, then the other characters. return character <= ' ' && (character == ' ' || character == '\n' || character == '\t' || character == '\r' || character == '\f'); } template<typename CharType> inline bool isHTMLSpaceOrComma(CharType character) { return isHTMLSpace<CharType>(character) || character == ','; } inline bool isHTMLLineBreak(UChar character) { return character <= '\r' && (character == '\n' || character == '\r'); } template<typename CharType> inline bool isNotHTMLSpace(CharType character) { return !isHTMLSpace<CharType>(character); } bool threadSafeMatch(const QualifiedName&, const QualifiedName&); bool threadSafeMatch(const String&, const QualifiedName&); enum CharacterWidth { Likely8Bit, Force8Bit, Force16Bit }; String attemptStaticStringCreation(const LChar*, size_t); String attemptStaticStringCreation(const UChar*, size_t, CharacterWidth); template<size_t inlineCapacity> inline static String attemptStaticStringCreation(const Vector<UChar, inlineCapacity>& vector, CharacterWidth width) { return attemptStaticStringCreation(vector.data(), vector.size(), width); } inline static String attemptStaticStringCreation(const String str) { if (!str.is8Bit()) return attemptStaticStringCreation(str.characters16(), str.length(), Force16Bit); return attemptStaticStringCreation(str.characters8(), str.length()); } } #endif