parser-mixin.js
8.34 KB
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
'use strict';
const Mixin = require('../../utils/mixin');
const Tokenizer = require('../../tokenizer');
const LocationInfoTokenizerMixin = require('./tokenizer-mixin');
const LocationInfoOpenElementStackMixin = require('./open-element-stack-mixin');
const HTML = require('../../common/html');
//Aliases
const $ = HTML.TAG_NAMES;
class LocationInfoParserMixin extends Mixin {
constructor(parser) {
super(parser);
this.parser = parser;
this.treeAdapter = this.parser.treeAdapter;
this.posTracker = null;
this.lastStartTagToken = null;
this.lastFosterParentingLocation = null;
this.currentToken = null;
}
_setStartLocation(element) {
let loc = null;
if (this.lastStartTagToken) {
loc = Object.assign({}, this.lastStartTagToken.location);
loc.startTag = this.lastStartTagToken.location;
}
this.treeAdapter.setNodeSourceCodeLocation(element, loc);
}
_setEndLocation(element, closingToken) {
const loc = this.treeAdapter.getNodeSourceCodeLocation(element);
if (loc) {
if (closingToken.location) {
const ctLoc = closingToken.location;
const tn = this.treeAdapter.getTagName(element);
// NOTE: For cases like <p> <p> </p> - First 'p' closes without a closing
// tag and for cases like <td> <p> </td> - 'p' closes without a closing tag.
const isClosingEndTag = closingToken.type === Tokenizer.END_TAG_TOKEN && tn === closingToken.tagName;
if (isClosingEndTag) {
loc.endTag = Object.assign({}, ctLoc);
loc.endLine = ctLoc.endLine;
loc.endCol = ctLoc.endCol;
loc.endOffset = ctLoc.endOffset;
} else {
loc.endLine = ctLoc.startLine;
loc.endCol = ctLoc.startCol;
loc.endOffset = ctLoc.startOffset;
}
}
}
}
_getOverriddenMethods(mxn, orig) {
return {
_bootstrap(document, fragmentContext) {
orig._bootstrap.call(this, document, fragmentContext);
mxn.lastStartTagToken = null;
mxn.lastFosterParentingLocation = null;
mxn.currentToken = null;
const tokenizerMixin = Mixin.install(this.tokenizer, LocationInfoTokenizerMixin);
mxn.posTracker = tokenizerMixin.posTracker;
Mixin.install(this.openElements, LocationInfoOpenElementStackMixin, {
onItemPop: function(element) {
mxn._setEndLocation(element, mxn.currentToken);
}
});
},
_runParsingLoop(scriptHandler) {
orig._runParsingLoop.call(this, scriptHandler);
// NOTE: generate location info for elements
// that remains on open element stack
for (let i = this.openElements.stackTop; i >= 0; i--) {
mxn._setEndLocation(this.openElements.items[i], mxn.currentToken);
}
},
//Token processing
_processTokenInForeignContent(token) {
mxn.currentToken = token;
orig._processTokenInForeignContent.call(this, token);
},
_processToken(token) {
mxn.currentToken = token;
orig._processToken.call(this, token);
//NOTE: <body> and <html> are never popped from the stack, so we need to updated
//their end location explicitly.
const requireExplicitUpdate =
token.type === Tokenizer.END_TAG_TOKEN &&
(token.tagName === $.HTML || (token.tagName === $.BODY && this.openElements.hasInScope($.BODY)));
if (requireExplicitUpdate) {
for (let i = this.openElements.stackTop; i >= 0; i--) {
const element = this.openElements.items[i];
if (this.treeAdapter.getTagName(element) === token.tagName) {
mxn._setEndLocation(element, token);
break;
}
}
}
},
//Doctype
_setDocumentType(token) {
orig._setDocumentType.call(this, token);
const documentChildren = this.treeAdapter.getChildNodes(this.document);
const cnLength = documentChildren.length;
for (let i = 0; i < cnLength; i++) {
const node = documentChildren[i];
if (this.treeAdapter.isDocumentTypeNode(node)) {
this.treeAdapter.setNodeSourceCodeLocation(node, token.location);
break;
}
}
},
//Elements
_attachElementToTree(element) {
//NOTE: _attachElementToTree is called from _appendElement, _insertElement and _insertTemplate methods.
//So we will use token location stored in this methods for the element.
mxn._setStartLocation(element);
mxn.lastStartTagToken = null;
orig._attachElementToTree.call(this, element);
},
_appendElement(token, namespaceURI) {
mxn.lastStartTagToken = token;
orig._appendElement.call(this, token, namespaceURI);
},
_insertElement(token, namespaceURI) {
mxn.lastStartTagToken = token;
orig._insertElement.call(this, token, namespaceURI);
},
_insertTemplate(token) {
mxn.lastStartTagToken = token;
orig._insertTemplate.call(this, token);
const tmplContent = this.treeAdapter.getTemplateContent(this.openElements.current);
this.treeAdapter.setNodeSourceCodeLocation(tmplContent, null);
},
_insertFakeRootElement() {
orig._insertFakeRootElement.call(this);
this.treeAdapter.setNodeSourceCodeLocation(this.openElements.current, null);
},
//Comments
_appendCommentNode(token, parent) {
orig._appendCommentNode.call(this, token, parent);
const children = this.treeAdapter.getChildNodes(parent);
const commentNode = children[children.length - 1];
this.treeAdapter.setNodeSourceCodeLocation(commentNode, token.location);
},
//Text
_findFosterParentingLocation() {
//NOTE: store last foster parenting location, so we will be able to find inserted text
//in case of foster parenting
mxn.lastFosterParentingLocation = orig._findFosterParentingLocation.call(this);
return mxn.lastFosterParentingLocation;
},
_insertCharacters(token) {
orig._insertCharacters.call(this, token);
const hasFosterParent = this._shouldFosterParentOnInsertion();
const parent =
(hasFosterParent && mxn.lastFosterParentingLocation.parent) ||
this.openElements.currentTmplContent ||
this.openElements.current;
const siblings = this.treeAdapter.getChildNodes(parent);
const textNodeIdx =
hasFosterParent && mxn.lastFosterParentingLocation.beforeElement
? siblings.indexOf(mxn.lastFosterParentingLocation.beforeElement) - 1
: siblings.length - 1;
const textNode = siblings[textNodeIdx];
//NOTE: if we have location assigned by another token, then just update end position
const tnLoc = this.treeAdapter.getNodeSourceCodeLocation(textNode);
if (tnLoc) {
tnLoc.endLine = token.location.endLine;
tnLoc.endCol = token.location.endCol;
tnLoc.endOffset = token.location.endOffset;
} else {
this.treeAdapter.setNodeSourceCodeLocation(textNode, token.location);
}
}
};
}
}
module.exports = LocationInfoParserMixin;