1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WebVTTParser_h
#define WebVTTParser_h
#if ENABLE(VIDEO_TRACK)
#include "DocumentFragment.h"
#include "HTMLNames.h"
#include "TextTrackCue.h"
#include "WebVTTTokenizer.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
using namespace HTMLNames;
class Document;
class WebVTTParserClient {
public:
virtual ~WebVTTParserClient() { }
virtual void newCuesParsed() = 0;
virtual void fileFailedToParse() = 0;
};
class WebVTTParser {
public:
virtual ~WebVTTParser() { }
enum ParseState { Initial, Header, Id, TimingsAndSettings, CueText, BadCue };
static PassOwnPtr<WebVTTParser> create(WebVTTParserClient* client, ScriptExecutionContext* context)
{
return adoptPtr(new WebVTTParser(client, context));
}
static inline bool isRecognizedTag(const AtomicString& tagName)
{
return tagName == iTag
|| tagName == bTag
|| tagName == uTag
|| tagName == rubyTag
|| tagName == rtTag;
}
static inline bool isASpace(char c)
{
// WebVTT space characters are U+0020 SPACE, U+0009 CHARACTER TABULATION (tab), U+000A LINE FEED (LF), U+000C FORM FEED (FF), and U+000D CARRIAGE RETURN (CR).
return c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r';
}
static inline bool isValidSettingDelimiter(char c)
{
// ... a WebVTT cue consists of zero or more of the following components, in any order, separated from each other by one or more
// U+0020 SPACE characters or U+0009 CHARACTER TABULATION (tab) characters.
return c == ' ' || c == '\t';
}
static String collectDigits(const String&, unsigned*);
static String collectWord(const String&, unsigned*);
// Input data to the parser to parse.
void parseBytes(const char* data, unsigned length);
// Transfers ownership of last parsed cues to caller.
void getNewCues(Vector<RefPtr<TextTrackCue> >&);
PassRefPtr<DocumentFragment> createDocumentFragmentFromCueText(const String&);
double collectTimeStamp(const String&, unsigned*);
protected:
WebVTTParser(WebVTTParserClient*, ScriptExecutionContext*);
ScriptExecutionContext* m_scriptExecutionContext;
ParseState m_state;
private:
bool hasRequiredFileIdentifier();
ParseState collectCueId(const String&);
ParseState collectTimingsAndSettings(const String&);
ParseState collectCueText(const String&, unsigned length, unsigned);
ParseState ignoreBadCue(const String&);
void createNewCue();
void resetCueValues();
void skipWhiteSpace(const String&, unsigned*);
static void skipLineTerminator(const char* data, unsigned length, unsigned*);
static String collectNextLine(const char* data, unsigned length, unsigned*);
void constructTreeFromToken(Document*);
Vector<char> m_identifierData;
String m_currentId;
double m_currentStartTime;
double m_currentEndTime;
StringBuilder m_currentContent;
String m_currentSettings;
WebVTTToken m_token;
OwnPtr<WebVTTTokenizer> m_tokenizer;
RefPtr<ContainerNode> m_currentNode;
WebVTTParserClient* m_client;
Vector<RefPtr<TextTrackCue> > m_cuelist;
};
} // namespace WebCore
#endif
#endif
|
