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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* Copyright (C) 2010 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 HTML5Tokenizer_h
#define HTML5Tokenizer_h
#include "CachedResourceClient.h"
#include "HTML5ScriptRunnerHost.h"
#include "HTML5Token.h"
#include "SegmentedString.h"
#include "DocumentParser.h"
#include <wtf/OwnPtr.h>
namespace WebCore {
class HTMLDocument;
class LegacyHTMLTreeConstructor;
class HTML5Lexer;
class HTML5ScriptRunner;
class HTML5TreeBuilder;
class ScriptController;
class ScriptSourceCode;
class HTML5DocumentParser : public DocumentParser, HTML5ScriptRunnerHost, CachedResourceClient {
public:
HTML5DocumentParser(HTMLDocument*, bool reportErrors);
virtual ~HTML5DocumentParser();
// DocumentParser
virtual void begin();
virtual void write(const SegmentedString&, bool appendData);
virtual void end();
virtual void finish();
virtual int executingScript() const;
virtual bool isWaitingForScripts() const;
virtual void executeScriptsWaitingForStylesheets();
virtual int lineNumber() const;
virtual int columnNumber() const;
// FIXME: HTMLFormControlElement accesses the LegacyHTMLTreeConstructor via this method.
// Remove this when the LegacyHTMLTreeConstructor is no longer used.
virtual LegacyHTMLTreeConstructor* htmlTreeConstructor() const;
// HTML5ScriptRunnerHost
virtual void watchForLoad(CachedResource*);
virtual void stopWatchingForLoad(CachedResource*);
virtual bool shouldLoadExternalScriptFromSrc(const AtomicString&);
virtual void executeScript(const ScriptSourceCode&);
// CachedResourceClient
virtual void notifyFinished(CachedResource*);
private:
// The InputStream is made up of a sequence of SegmentedStrings:
//
// [--current--][--next--][--next--] ... [--next--]
// /\ (also called m_last)
// L_ current insertion point
//
// The current segmented string is stored in InputStream. Each of the
// afterInsertionPoint buffers are stored in InsertionPointRecords on the
// stack.
//
// We remove characters from the "current" string in the InputStream.
// document.write() will add characters at the current insertion point,
// which appends them to the "current" string.
//
// m_last is a pointer to the last of the afterInsertionPoint strings.
// The network adds data at the end of the InputStream, which appends
// them to the "last" string.
class InputStream {
public:
InputStream()
: m_last(&m_first)
{
}
void appendToEnd(const SegmentedString& string)
{
m_last->append(string);
}
void insertAtCurrentInsertionPoint(const SegmentedString& string)
{
m_first.append(string);
}
void close() { m_last->close(); }
SegmentedString& current() { return m_first; }
void splitInto(SegmentedString& next)
{
next = m_first;
m_first = SegmentedString();
if (m_last == &m_first) {
// We used to only have one SegmentedString in the InputStream
// but now we have two. That means m_first is no longer also
// the m_last string, |next| is now the last one.
m_last = &next;
}
}
void mergeFrom(SegmentedString& next)
{
m_first.append(next);
if (m_last == &next) {
// The string |next| used to be the last SegmentedString in
// the InputStream. Now that it's been merged into m_first,
// that makes m_first the last one.
m_last = &m_first;
}
if (next.isClosed()) {
// We also need to merge the "closed" state from next to
// m_first. Arguably, this work could be done in append().
m_first.close();
}
}
private:
SegmentedString m_first;
SegmentedString* m_last;
};
class InsertionPointRecord {
public:
InsertionPointRecord(InputStream& inputStream)
: m_inputStream(&inputStream)
{
m_inputStream->splitInto(m_next);
}
~InsertionPointRecord()
{
m_inputStream->mergeFrom(m_next);
}
private:
InputStream* m_inputStream;
SegmentedString m_next;
};
void willPumpLexer();
void didPumpLexer();
void pumpLexer();
void pumpLexerIfPossible();
void resumeParsingAfterScriptExecution();
void attemptToEnd();
void endIfDelayed();
bool inWrite() const { return m_writeNestingLevel > 0; }
ScriptController* script() const;
InputStream m_input;
// We hold m_token here because it might be partially complete.
HTML5Token m_token;
HTMLDocument* m_document;
OwnPtr<HTML5Lexer> m_lexer;
OwnPtr<HTML5ScriptRunner> m_scriptRunner;
OwnPtr<HTML5TreeBuilder> m_treeConstructor;
bool m_endWasDelayed;
int m_writeNestingLevel;
};
}
#endif
|
