/* * 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 <wtf/Forward.h> #include <wtf/unicode/Unicode.h> 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&); // An implementation of the HTML specification's algorithm to convert a number to a string for number and range types. String serializeForNumberType(double); // Convert the specified string to a double. If the conversion fails, the return value is false. // 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. bool parseToDoubleForNumberType(const String&, double*); bool parseToDoubleForNumberTypeWithDecimalPlaces(const String&, double*, unsigned*); // 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 int&); // Inline implementations of some of the functions declared above. inline bool isHTMLSpace(UChar 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'); } inline bool isHTMLLineBreak(UChar character) { return character <= '\r' && (character == '\n' || character == '\r'); } inline bool isNotHTMLSpace(UChar character) { return !isHTMLSpace(character); } } #endif