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| 1 /* | |
| 2 * Copyright (C) 2010 Google, 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. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef SKY_ENGINE_CORE_HTML_PARSER_HTMLPARSERSCHEDULER_H_ | |
| 27 #define SKY_ENGINE_CORE_HTML_PARSER_HTMLPARSERSCHEDULER_H_ | |
| 28 | |
| 29 #include "sky/engine/core/html/parser/NestingLevelIncrementer.h" | |
| 30 #include "sky/engine/platform/Timer.h" | |
| 31 #include "sky/engine/wtf/CurrentTime.h" | |
| 32 #include "sky/engine/wtf/PassOwnPtr.h" | |
| 33 #include "sky/engine/wtf/RefPtr.h" | |
| 34 | |
| 35 namespace blink { | |
| 36 | |
| 37 class Document; | |
| 38 class HTMLDocumentParser; | |
| 39 | |
| 40 class ActiveParserSession { | |
| 41 STACK_ALLOCATED(); | |
| 42 public: | |
| 43 explicit ActiveParserSession(Document*); | |
| 44 ~ActiveParserSession(); | |
| 45 | |
| 46 private: | |
| 47 RefPtr<Document> m_document; | |
| 48 }; | |
| 49 | |
| 50 class PumpSession : public NestingLevelIncrementer, public ActiveParserSession { | |
| 51 STACK_ALLOCATED(); | |
| 52 public: | |
| 53 PumpSession(unsigned& nestingLevel, Document*); | |
| 54 ~PumpSession(); | |
| 55 | |
| 56 int processedTokens; | |
| 57 double startTime; | |
| 58 bool needsYield; | |
| 59 bool didSeeScript; | |
| 60 }; | |
| 61 | |
| 62 class HTMLParserScheduler { | |
| 63 WTF_MAKE_NONCOPYABLE(HTMLParserScheduler); WTF_MAKE_FAST_ALLOCATED; | |
| 64 public: | |
| 65 static PassOwnPtr<HTMLParserScheduler> create(HTMLDocumentParser* parser) | |
| 66 { | |
| 67 return adoptPtr(new HTMLParserScheduler(parser)); | |
| 68 } | |
| 69 ~HTMLParserScheduler(); | |
| 70 | |
| 71 // Inline as this is called after every token in the parser. | |
| 72 void checkForYieldBeforeToken(PumpSession& session) | |
| 73 { | |
| 74 if (session.processedTokens > parserChunkSize || session.didSeeScript) { | |
| 75 // currentTime() can be expensive. By delaying, we avoided calling | |
| 76 // currentTime() when constructing non-yielding PumpSessions. | |
| 77 if (!session.startTime) | |
| 78 session.startTime = currentTime(); | |
| 79 | |
| 80 session.processedTokens = 0; | |
| 81 session.didSeeScript = false; | |
| 82 | |
| 83 double elapsedTime = currentTime() - session.startTime; | |
| 84 if (elapsedTime > parserTimeLimit) | |
| 85 session.needsYield = true; | |
| 86 } | |
| 87 ++session.processedTokens; | |
| 88 } | |
| 89 | |
| 90 void scheduleForResume(); | |
| 91 bool isScheduledForResume() const { return m_continueNextChunkTimer.isActive
(); } | |
| 92 | |
| 93 private: | |
| 94 static const double parserTimeLimit; | |
| 95 static const int parserChunkSize; | |
| 96 | |
| 97 HTMLParserScheduler(HTMLDocumentParser*); | |
| 98 | |
| 99 void continueNextChunkTimerFired(Timer<HTMLParserScheduler>*); | |
| 100 | |
| 101 HTMLDocumentParser* m_parser; | |
| 102 | |
| 103 Timer<HTMLParserScheduler> m_continueNextChunkTimer; | |
| 104 }; | |
| 105 | |
| 106 } | |
| 107 | |
| 108 #endif // SKY_ENGINE_CORE_HTML_PARSER_HTMLPARSERSCHEDULER_H_ | |
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Chromium Code Reviews
Issue 1215103007:
Remove remaining HTML elements (Closed)
Base URL: git@github.com:domokit/mojo.git@master