1 /* 2 * Copyright (C) 2010 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #ifndef HTMLParserIdioms_h 26 #define HTMLParserIdioms_h 27 28 #include <wtf/Forward.h> 29 #include <wtf/unicode/Unicode.h> 30 31 namespace WebCore { 32 33 // Space characters as defined by the HTML specification. 34 bool isHTMLSpace(UChar); 35 bool isNotHTMLSpace(UChar); 36 37 // Strip leading and trailing whitespace as defined by the HTML specification. 38 String stripLeadingAndTrailingHTMLSpaces(const String&); 39 40 // An implementation of the HTML specification's algorithm to convert a number to a string for number and range types. 41 String serializeForNumberType(double); 42 43 // Convert the specified string to a double. If the conversion fails, the return value is false. 44 // Leading or trailing illegal characters cause failure, as does passing an empty string. 45 // The double* parameter may be 0 to check if the string can be parsed without getting the result. 46 bool parseToDoubleForNumberType(const String&, double*); 47 bool parseToDoubleForNumberTypeWithDecimalPlaces(const String&, double*, unsigned*); 48 49 // http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers 50 bool parseHTMLInteger(const String&, int&); 51 52 // Inline implementations of some of the functions declared above. 53 54 inline bool isHTMLSpace(UChar character) 55 { 56 // Histogram from Apple's page load test combined with some ad hoc browsing some other test suites. 57 // 58 // 82%: 216330 non-space characters, all > U+0020 59 // 11%: 30017 plain space characters, U+0020 60 // 5%: 12099 newline characters, U+000A 61 // 2%: 5346 tab characters, U+0009 62 // 63 // No other characters seen. No U+000C or U+000D, and no other control characters. 64 // Accordingly, we check for non-spaces first, then space, then newline, then tab, then the other characters. 65 66 return character <= ' ' && (character == ' ' || character == '\n' || character == '\t' || character == '\r' || character == '\f'); 67 } 68 69 inline bool isNotHTMLSpace(UChar character) 70 { 71 return !isHTMLSpace(character); 72 } 73 74 } 75 76 #endif 77
