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 "core/dom/QualifiedName.h" 29 #include "core/html/parser/HTMLIdentifier.h" 30 #include "wtf/Forward.h" 31 #include "wtf/text/WTFString.h" 32 33 namespace WebCore { 34 35 class Decimal; 36 37 // Space characters as defined by the HTML specification. 38 bool isHTMLSpace(UChar); 39 bool isHTMLLineBreak(UChar); 40 bool isNotHTMLSpace(UChar); 41 42 // Strip leading and trailing whitespace as defined by the HTML specification. 43 String stripLeadingAndTrailingHTMLSpaces(const String&); 44 template<size_t inlineCapacity> 45 String stripLeadingAndTrailingHTMLSpaces(const Vector<UChar, inlineCapacity>& vector) 46 { 47 return stripLeadingAndTrailingHTMLSpaces(StringImpl::create8BitIfPossible(vector)); 48 } 49 50 // An implementation of the HTML specification's algorithm to convert a number to a string for number and range types. 51 String serializeForNumberType(const Decimal&); 52 String serializeForNumberType(double); 53 54 // Convert the specified string to a decimal/double. If the conversion fails, the return value is fallback value or NaN if not specified. 55 // Leading or trailing illegal characters cause failure, as does passing an empty string. 56 // The double* parameter may be 0 to check if the string can be parsed without getting the result. 57 Decimal parseToDecimalForNumberType(const String&); 58 Decimal parseToDecimalForNumberType(const String&, const Decimal& fallbackValue); 59 double parseToDoubleForNumberType(const String&); 60 double parseToDoubleForNumberType(const String&, double fallbackValue); 61 62 // http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers 63 bool parseHTMLInteger(const String&, int&); 64 65 // http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-non-negative-integers 66 bool parseHTMLNonNegativeInteger(const String&, unsigned int&); 67 68 // Inline implementations of some of the functions declared above. 69 70 inline bool isHTMLSpace(UChar character) 71 { 72 // Histogram from Apple's page load test combined with some ad hoc browsing some other test suites. 73 // 74 // 82%: 216330 non-space characters, all > U+0020 75 // 11%: 30017 plain space characters, U+0020 76 // 5%: 12099 newline characters, U+000A 77 // 2%: 5346 tab characters, U+0009 78 // 79 // No other characters seen. No U+000C or U+000D, and no other control characters. 80 // Accordingly, we check for non-spaces first, then space, then newline, then tab, then the other characters. 81 82 return character <= ' ' && (character == ' ' || character == '\n' || character == '\t' || character == '\r' || character == '\f'); 83 } 84 85 inline bool isHTMLLineBreak(UChar character) 86 { 87 return character <= '\r' && (character == '\n' || character == '\r'); 88 } 89 90 inline bool isNotHTMLSpace(UChar character) 91 { 92 return !isHTMLSpace(character); 93 } 94 95 bool threadSafeMatch(const QualifiedName&, const QualifiedName&); 96 bool threadSafeMatch(const HTMLIdentifier&, const QualifiedName&); 97 inline bool threadSafeHTMLNamesMatch(const HTMLIdentifier& tagName, const QualifiedName& qName) 98 { 99 // When the QualifiedName is known to HTMLIdentifier, 100 // all we have to do is a pointer compare. 101 ASSERT(HTMLIdentifier::isKnown(qName.localName().impl())); 102 return tagName.asStringImpl() == qName.localName().impl(); 103 } 104 105 } 106 107 #endif 108
