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| 1 /* | 1 /* |
| 2 * Copyright (C) 2011 Google Inc. All rights reserved. | 2 * Copyright (C) 2011 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
| (...skipping 14 matching lines...) Expand all Loading... |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ | 29 */ |
| 30 | 30 |
| 31 #ifndef WebVTTParser_h | 31 #ifndef WebVTTParser_h |
| 32 #define WebVTTParser_h | 32 #define WebVTTParser_h |
| 33 | 33 |
| 34 #include "HTMLNames.h" | 34 #include "HTMLNames.h" |
| 35 #include "RuntimeEnabledFeatures.h" |
| 35 #include "core/dom/DocumentFragment.h" | 36 #include "core/dom/DocumentFragment.h" |
| 36 #include "core/html/track/TextTrackCue.h" | 37 #include "core/html/track/TextTrackCue.h" |
| 37 #include "core/html/track/TextTrackRegion.h" | 38 #include "core/html/track/TextTrackRegion.h" |
| 38 #include "core/html/track/WebVTTTokenizer.h" | 39 #include "core/html/track/WebVTTTokenizer.h" |
| 39 #include "wtf/PassOwnPtr.h" | 40 #include "wtf/PassOwnPtr.h" |
| 40 #include "wtf/text/StringBuilder.h" | 41 #include "wtf/text/StringBuilder.h" |
| 41 | 42 |
| 42 namespace WebCore { | 43 namespace WebCore { |
| 43 | 44 |
| 44 using namespace HTMLNames; | 45 using namespace HTMLNames; |
| 45 | 46 |
| 46 class Document; | 47 class Document; |
| 47 | 48 |
| 48 class WebVTTParserClient { | 49 class WebVTTParserClient { |
| 49 public: | 50 public: |
| 50 virtual ~WebVTTParserClient() { } | 51 virtual ~WebVTTParserClient() { } |
| 51 | 52 |
| 52 virtual void newCuesParsed() = 0; | 53 virtual void newCuesParsed() = 0; |
| 53 #if ENABLE(WEBVTT_REGIONS) | |
| 54 virtual void newRegionsParsed() = 0; | 54 virtual void newRegionsParsed() = 0; |
| 55 #endif | |
| 56 virtual void fileFailedToParse() = 0; | 55 virtual void fileFailedToParse() = 0; |
| 57 }; | 56 }; |
| 58 | 57 |
| 59 class WebVTTParser { | 58 class WebVTTParser { |
| 60 public: | 59 public: |
| 61 virtual ~WebVTTParser() { } | 60 virtual ~WebVTTParser() { } |
| 62 | 61 |
| 63 enum ParseState { | 62 enum ParseState { |
| 64 Initial, | 63 Initial, |
| 65 Header, | 64 Header, |
| 66 #if ENABLE(WEBVTT_REGIONS) | |
| 67 Metadata, | 65 Metadata, |
| 68 #endif | |
| 69 Id, | 66 Id, |
| 70 TimingsAndSettings, | 67 TimingsAndSettings, |
| 71 CueText, | 68 CueText, |
| 72 BadCue | 69 BadCue |
| 73 }; | 70 }; |
| 74 | 71 |
| 75 static PassOwnPtr<WebVTTParser> create(WebVTTParserClient* client, ScriptExe
cutionContext* context) | 72 static PassOwnPtr<WebVTTParser> create(WebVTTParserClient* client, ScriptExe
cutionContext* context) |
| 76 { | 73 { |
| 77 return adoptPtr(new WebVTTParser(client, context)); | 74 return adoptPtr(new WebVTTParser(client, context)); |
| 78 } | 75 } |
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| 93 } | 90 } |
| 94 static inline bool isValidSettingDelimiter(char c) | 91 static inline bool isValidSettingDelimiter(char c) |
| 95 { | 92 { |
| 96 // ... a WebVTT cue consists of zero or more of the following components
, in any order, separated from each other by one or more | 93 // ... a WebVTT cue consists of zero or more of the following components
, in any order, separated from each other by one or more |
| 97 // U+0020 SPACE characters or U+0009 CHARACTER TABULATION (tab) characte
rs. | 94 // U+0020 SPACE characters or U+0009 CHARACTER TABULATION (tab) characte
rs. |
| 98 return c == ' ' || c == '\t'; | 95 return c == ' ' || c == '\t'; |
| 99 } | 96 } |
| 100 static String collectDigits(const String&, unsigned*); | 97 static String collectDigits(const String&, unsigned*); |
| 101 static String collectWord(const String&, unsigned*); | 98 static String collectWord(const String&, unsigned*); |
| 102 | 99 |
| 103 #if ENABLE(WEBVTT_REGIONS) | |
| 104 // Useful functions for parsing percentage settings. | 100 // Useful functions for parsing percentage settings. |
| 105 static float parseFloatPercentageValue(const String&, bool&); | 101 static float parseFloatPercentageValue(const String&, bool&); |
| 106 static FloatPoint parseFloatPercentageValuePair(const String&, char, bool&); | 102 static FloatPoint parseFloatPercentageValuePair(const String&, char, bool&); |
| 107 #endif | |
| 108 | 103 |
| 109 // Input data to the parser to parse. | 104 // Input data to the parser to parse. |
| 110 void parseBytes(const char* data, unsigned length); | 105 void parseBytes(const char* data, unsigned length); |
| 111 | 106 |
| 112 // Transfers ownership of last parsed cues to caller. | 107 // Transfers ownership of last parsed cues to caller. |
| 113 void getNewCues(Vector<RefPtr<TextTrackCue> >&); | 108 void getNewCues(Vector<RefPtr<TextTrackCue> >&); |
| 114 #if ENABLE(WEBVTT_REGIONS) | |
| 115 void getNewRegions(Vector<RefPtr<TextTrackRegion> >&); | 109 void getNewRegions(Vector<RefPtr<TextTrackRegion> >&); |
| 116 #endif | |
| 117 | 110 |
| 118 PassRefPtr<DocumentFragment> createDocumentFragmentFromCueText(const String&
); | 111 PassRefPtr<DocumentFragment> createDocumentFragmentFromCueText(const String&
); |
| 119 double collectTimeStamp(const String&, unsigned*); | 112 double collectTimeStamp(const String&, unsigned*); |
| 120 | 113 |
| 121 protected: | 114 protected: |
| 122 WebVTTParser(WebVTTParserClient*, ScriptExecutionContext*); | 115 WebVTTParser(WebVTTParserClient*, ScriptExecutionContext*); |
| 123 | 116 |
| 124 ScriptExecutionContext* m_scriptExecutionContext; | 117 ScriptExecutionContext* m_scriptExecutionContext; |
| 125 ParseState m_state; | 118 ParseState m_state; |
| 126 | 119 |
| 127 private: | 120 private: |
| 128 bool hasRequiredFileIdentifier(); | 121 bool hasRequiredFileIdentifier(); |
| 129 ParseState collectCueId(const String&); | 122 ParseState collectCueId(const String&); |
| 130 ParseState collectTimingsAndSettings(const String&); | 123 ParseState collectTimingsAndSettings(const String&); |
| 131 ParseState collectCueText(const String&, unsigned length, unsigned); | 124 ParseState collectCueText(const String&, unsigned length, unsigned); |
| 132 ParseState ignoreBadCue(const String&); | 125 ParseState ignoreBadCue(const String&); |
| 133 | 126 |
| 134 void createNewCue(); | 127 void createNewCue(); |
| 135 void resetCueValues(); | 128 void resetCueValues(); |
| 136 | 129 |
| 137 #if ENABLE(WEBVTT_REGIONS) | |
| 138 void collectHeader(const String&); | 130 void collectHeader(const String&); |
| 139 void createNewRegion(); | 131 void createNewRegion(); |
| 140 #endif | |
| 141 | 132 |
| 142 void skipWhiteSpace(const String&, unsigned*); | 133 void skipWhiteSpace(const String&, unsigned*); |
| 143 static void skipLineTerminator(const char* data, unsigned length, unsigned*)
; | 134 static void skipLineTerminator(const char* data, unsigned length, unsigned*)
; |
| 144 static String collectNextLine(const char* data, unsigned length, unsigned*); | 135 static String collectNextLine(const char* data, unsigned length, unsigned*); |
| 145 | 136 |
| 146 void constructTreeFromToken(Document&); | 137 void constructTreeFromToken(Document&); |
| 147 | 138 |
| 148 String m_currentHeaderName; | 139 String m_currentHeaderName; |
| 149 String m_currentHeaderValue; | 140 String m_currentHeaderValue; |
| 150 | 141 |
| 151 Vector<char> m_identifierData; | 142 Vector<char> m_identifierData; |
| 152 String m_currentId; | 143 String m_currentId; |
| 153 double m_currentStartTime; | 144 double m_currentStartTime; |
| 154 double m_currentEndTime; | 145 double m_currentEndTime; |
| 155 StringBuilder m_currentContent; | 146 StringBuilder m_currentContent; |
| 156 String m_currentSettings; | 147 String m_currentSettings; |
| 157 | 148 |
| 158 WebVTTToken m_token; | 149 WebVTTToken m_token; |
| 159 OwnPtr<WebVTTTokenizer> m_tokenizer; | 150 OwnPtr<WebVTTTokenizer> m_tokenizer; |
| 160 | 151 |
| 161 RefPtr<ContainerNode> m_currentNode; | 152 RefPtr<ContainerNode> m_currentNode; |
| 162 | 153 |
| 163 WebVTTParserClient* m_client; | 154 WebVTTParserClient* m_client; |
| 164 | 155 |
| 165 Vector<AtomicString> m_languageStack; | 156 Vector<AtomicString> m_languageStack; |
| 166 Vector<RefPtr<TextTrackCue> > m_cuelist; | 157 Vector<RefPtr<TextTrackCue> > m_cuelist; |
| 167 | 158 |
| 168 #if ENABLE(WEBVTT_REGIONS) | |
| 169 Vector<RefPtr<TextTrackRegion> > m_regionList; | 159 Vector<RefPtr<TextTrackRegion> > m_regionList; |
| 170 #endif | |
| 171 }; | 160 }; |
| 172 | 161 |
| 173 } // namespace WebCore | 162 } // namespace WebCore |
| 174 | 163 |
| 175 #endif | 164 #endif |
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