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| 1 /* | |
| 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. | |
| 3 * Copyright (C) 2009 Torch Mobile, Inc. http://www.torchmobile.com/ | |
| 4 * Copyright (C) 2013 Google, Inc. All Rights Reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in the | |
| 13 * documentation and/or other materials provided with the distribution. | |
| 14 * | |
| 15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
| 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
| 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #ifndef SKY_ENGINE_CORE_HTML_PARSER_INPUTSTREAMPREPROCESSOR_H_ | |
| 29 #define SKY_ENGINE_CORE_HTML_PARSER_INPUTSTREAMPREPROCESSOR_H_ | |
| 30 | |
| 31 #include "sky/engine/platform/text/SegmentedString.h" | |
| 32 #include "sky/engine/wtf/Noncopyable.h" | |
| 33 | |
| 34 namespace blink { | |
| 35 | |
| 36 const LChar kEndOfFileMarker = 0; | |
| 37 | |
| 38 // http://www.whatwg.org/specs/web-apps/current-work/#preprocessing-the-input-st
ream | |
| 39 template <typename Tokenizer> | |
| 40 class InputStreamPreprocessor { | |
| 41 WTF_MAKE_NONCOPYABLE(InputStreamPreprocessor); | |
| 42 public: | |
| 43 InputStreamPreprocessor(Tokenizer* tokenizer) | |
| 44 : m_tokenizer(tokenizer) | |
| 45 { | |
| 46 reset(); | |
| 47 } | |
| 48 | |
| 49 ALWAYS_INLINE UChar nextInputCharacter() const { return m_nextInputCharacter
; } | |
| 50 | |
| 51 // Returns whether we succeeded in peeking at the next character. | |
| 52 // The only way we can fail to peek is if there are no more | |
| 53 // characters in |source| (after collapsing \r\n, etc). | |
| 54 ALWAYS_INLINE bool peek(SegmentedString& source) | |
| 55 { | |
| 56 m_nextInputCharacter = source.currentChar(); | |
| 57 | |
| 58 // Every branch in this function is expensive, so we have a | |
| 59 // fast-reject branch for characters that don't require special | |
| 60 // handling. Please run the parser benchmark whenever you touch | |
| 61 // this function. It's very hot. | |
| 62 static const UChar specialCharacterMask = '\n' | '\r'; | |
| 63 if (m_nextInputCharacter & ~specialCharacterMask) { | |
| 64 m_skipNextNewLine = false; | |
| 65 return true; | |
| 66 } | |
| 67 return processNextInputCharacter(source); | |
| 68 } | |
| 69 | |
| 70 // Returns whether there are more characters in |source| after advancing. | |
| 71 ALWAYS_INLINE bool advance(SegmentedString& source) | |
| 72 { | |
| 73 source.advanceAndUpdateLineNumber(); | |
| 74 if (source.isEmpty()) | |
| 75 return false; | |
| 76 return peek(source); | |
| 77 } | |
| 78 | |
| 79 bool skipNextNewLine() const { return m_skipNextNewLine; } | |
| 80 | |
| 81 void reset(bool skipNextNewLine = false) | |
| 82 { | |
| 83 m_nextInputCharacter = '\0'; | |
| 84 m_skipNextNewLine = skipNextNewLine; | |
| 85 } | |
| 86 | |
| 87 private: | |
| 88 bool processNextInputCharacter(SegmentedString& source) | |
| 89 { | |
| 90 ASSERT(m_nextInputCharacter == source.currentChar()); | |
| 91 | |
| 92 if (m_nextInputCharacter == '\n' && m_skipNextNewLine) { | |
| 93 m_skipNextNewLine = false; | |
| 94 source.advancePastNewlineAndUpdateLineNumber(); | |
| 95 if (source.isEmpty()) | |
| 96 return false; | |
| 97 m_nextInputCharacter = source.currentChar(); | |
| 98 } | |
| 99 if (m_nextInputCharacter == '\r') { | |
| 100 m_nextInputCharacter = '\n'; | |
| 101 m_skipNextNewLine = true; | |
| 102 } else { | |
| 103 m_skipNextNewLine = false; | |
| 104 // FIXME: The spec indicates that the surrogate pair range as well a
s | |
| 105 // a number of specific character values are parse errors and should
be replaced | |
| 106 // by the replacement character. We suspect this is a problem with t
he spec as doing | |
| 107 // that filtering breaks surrogate pair handling and causes us not t
o match Minefield. | |
| 108 } | |
| 109 return true; | |
| 110 } | |
| 111 | |
| 112 Tokenizer* m_tokenizer; | |
| 113 | |
| 114 // http://www.whatwg.org/specs/web-apps/current-work/#next-input-character | |
| 115 UChar m_nextInputCharacter; | |
| 116 bool m_skipNextNewLine; | |
| 117 }; | |
| 118 | |
| 119 } | |
| 120 | |
| 121 #endif // SKY_ENGINE_CORE_HTML_PARSER_INPUTSTREAMPREPROCESSOR_H_ | |
| 122 | |
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Chromium Code Reviews
Issue 1215103007:
Remove remaining HTML elements (Closed)
Base URL: git@github.com:domokit/mojo.git@master