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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/*
* Copyright (C) 2010 Google, Inc. All Rights Reserved.
* Copyright (C) 2011 Apple 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 GOOGLE 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 GOOGLE 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 HTMLTreeBuilder_h
#define HTMLTreeBuilder_h
#include "core/html/parser/HTMLConstructionSite.h"
#include "core/html/parser/HTMLElementStack.h"
#include "core/html/parser/HTMLParserOptions.h"
#include "platform/heap/Handle.h"
#include "wtf/Noncopyable.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/TextPosition.h"
namespace WebCore {
class AtomicHTMLToken;
class Document;
class DocumentFragment;
class Element;
class LocalFrame;
class HTMLToken;
class HTMLDocument;
class Node;
class HTMLDocumentParser;
class HTMLTreeBuilder FINAL : public NoBaseWillBeGarbageCollectedFinalized<HTMLTreeBuilder> {
WTF_MAKE_NONCOPYABLE(HTMLTreeBuilder); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
public:
static PassOwnPtrWillBeRawPtr<HTMLTreeBuilder> create(HTMLDocumentParser* parser, HTMLDocument* document, ParserContentPolicy parserContentPolicy, bool reportErrors, const HTMLParserOptions& options)
{
return adoptPtrWillBeNoop(new HTMLTreeBuilder(parser, document, parserContentPolicy, reportErrors, options));
}
static PassOwnPtrWillBeRawPtr<HTMLTreeBuilder> create(HTMLDocumentParser* parser, DocumentFragment* fragment, Element* contextElement, ParserContentPolicy parserContentPolicy, const HTMLParserOptions& options)
{
return adoptPtrWillBeNoop(new HTMLTreeBuilder(parser, fragment, contextElement, parserContentPolicy, options));
}
~HTMLTreeBuilder();
void trace(Visitor*);
const HTMLElementStack* openElements() const { return m_tree.openElements(); }
bool isParsingFragment() const { return !!m_fragmentContext.fragment(); }
bool isParsingTemplateContents() const { return m_tree.openElements()->hasTemplateInHTMLScope(); }
bool isParsingFragmentOrTemplateContents() const { return isParsingFragment() || isParsingTemplateContents(); }
void detach();
void constructTree(AtomicHTMLToken*);
bool hasParserBlockingScript() const { return !!m_scriptToProcess; }
// Must be called to take the parser-blocking script before calling the parser again.
PassRefPtrWillBeRawPtr<Element> takeScriptToProcess(TextPosition& scriptStartPosition);
// Done, close any open tags, etc.
void finished();
// Synchronously empty any queues, possibly creating more DOM nodes.
void flush() { m_tree.flush(); }
void setShouldSkipLeadingNewline(bool shouldSkip) { m_shouldSkipLeadingNewline = shouldSkip; }
private:
class CharacterTokenBuffer;
// Represents HTML5 "insertion mode"
// http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#insertion-mode
enum InsertionMode {
InitialMode,
BeforeHTMLMode,
BeforeHeadMode,
InHeadMode,
InHeadNoscriptMode,
AfterHeadMode,
TemplateContentsMode,
InBodyMode,
TextMode,
InTableMode,
InTableTextMode,
InCaptionMode,
InColumnGroupMode,
InTableBodyMode,
InRowMode,
InCellMode,
InSelectMode,
InSelectInTableMode,
AfterBodyMode,
InFramesetMode,
AfterFramesetMode,
AfterAfterBodyMode,
AfterAfterFramesetMode,
};
HTMLTreeBuilder(HTMLDocumentParser*, HTMLDocument*, ParserContentPolicy, bool reportErrors, const HTMLParserOptions&);
HTMLTreeBuilder(HTMLDocumentParser*, DocumentFragment*, Element* contextElement, ParserContentPolicy, const HTMLParserOptions&);
void processToken(AtomicHTMLToken*);
void processDoctypeToken(AtomicHTMLToken*);
void processStartTag(AtomicHTMLToken*);
void processEndTag(AtomicHTMLToken*);
void processComment(AtomicHTMLToken*);
void processCharacter(AtomicHTMLToken*);
void processEndOfFile(AtomicHTMLToken*);
bool processStartTagForInHead(AtomicHTMLToken*);
void processStartTagForInBody(AtomicHTMLToken*);
void processStartTagForInTable(AtomicHTMLToken*);
void processEndTagForInBody(AtomicHTMLToken*);
void processEndTagForInTable(AtomicHTMLToken*);
void processEndTagForInTableBody(AtomicHTMLToken*);
void processEndTagForInRow(AtomicHTMLToken*);
void processEndTagForInCell(AtomicHTMLToken*);
void processIsindexStartTagForInBody(AtomicHTMLToken*);
void processHtmlStartTagForInBody(AtomicHTMLToken*);
bool processBodyEndTagForInBody(AtomicHTMLToken*);
bool processTableEndTagForInTable();
bool processCaptionEndTagForInCaption();
bool processColgroupEndTagForInColumnGroup();
bool processTrEndTagForInRow();
// FIXME: This function should be inlined into its one call site or it
// needs to assert which tokens it can be called with.
void processAnyOtherEndTagForInBody(AtomicHTMLToken*);
void processCharacterBuffer(CharacterTokenBuffer&);
inline void processCharacterBufferForInBody(CharacterTokenBuffer&);
void processFakeStartTag(const QualifiedName&, const Vector<Attribute>& attributes = Vector<Attribute>());
void processFakeEndTag(const QualifiedName&);
void processFakeEndTag(const AtomicString&);
void processFakePEndTagIfPInButtonScope();
void processGenericRCDATAStartTag(AtomicHTMLToken*);
void processGenericRawTextStartTag(AtomicHTMLToken*);
void processScriptStartTag(AtomicHTMLToken*);
// Default processing for the different insertion modes.
void defaultForInitial();
void defaultForBeforeHTML();
void defaultForBeforeHead();
void defaultForInHead();
void defaultForInHeadNoscript();
void defaultForAfterHead();
void defaultForInTableText();
inline HTMLStackItem* adjustedCurrentStackItem() const;
inline bool shouldProcessTokenInForeignContent(AtomicHTMLToken*);
void processTokenInForeignContent(AtomicHTMLToken*);
Vector<Attribute> attributesForIsindexInput(AtomicHTMLToken*);
void callTheAdoptionAgency(AtomicHTMLToken*);
void closeTheCell();
template <bool shouldClose(const HTMLStackItem*)>
void processCloseWhenNestedTag(AtomicHTMLToken*);
void parseError(AtomicHTMLToken*);
InsertionMode insertionMode() const { return m_insertionMode; }
void setInsertionMode(InsertionMode mode) { m_insertionMode = mode; }
void resetInsertionModeAppropriately();
void processTemplateStartTag(AtomicHTMLToken*);
bool processTemplateEndTag(AtomicHTMLToken*);
bool processEndOfFileForInTemplateContents(AtomicHTMLToken*);
class FragmentParsingContext {
WTF_MAKE_NONCOPYABLE(FragmentParsingContext);
DISALLOW_ALLOCATION();
public:
FragmentParsingContext();
FragmentParsingContext(DocumentFragment*, Element* contextElement);
~FragmentParsingContext();
DocumentFragment* fragment() const { return m_fragment; }
Element* contextElement() const { ASSERT(m_fragment); return m_contextElementStackItem->element(); }
HTMLStackItem* contextElementStackItem() const { ASSERT(m_fragment); return m_contextElementStackItem.get(); }
void trace(Visitor*);
private:
RawPtrWillBeMember<DocumentFragment> m_fragment;
RefPtrWillBeMember<HTMLStackItem> m_contextElementStackItem;
};
bool m_framesetOk;
#ifndef NDEBUG
bool m_isAttached;
#endif
FragmentParsingContext m_fragmentContext;
HTMLConstructionSite m_tree;
// http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#insertion-mode
InsertionMode m_insertionMode;
// http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#original-insertion-mode
InsertionMode m_originalInsertionMode;
Vector<InsertionMode> m_templateInsertionModes;
// http://www.whatwg.org/specs/web-apps/current-work/multipage/tokenization.html#pending-table-character-tokens
StringBuilder m_pendingTableCharacters;
bool m_shouldSkipLeadingNewline;
// We access parser because HTML5 spec requires that we be able to change the state of the tokenizer
// from within parser actions. We also need it to track the current position.
RawPtrWillBeMember<HTMLDocumentParser> m_parser;
RefPtrWillBeMember<Element> m_scriptToProcess; // <script> tag which needs processing before resuming the parser.
TextPosition m_scriptToProcessStartPosition; // Starting line number of the script tag needing processing.
HTMLParserOptions m_options;
};
}
#endif
|
