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
|
var ElementType = require("domelementtype");
var re_whitespace = /\s+/g;
var NodePrototype = require("./lib/node");
var ElementPrototype = require("./lib/element");
function DomHandler(callback, options, elementCB){
if(typeof callback === "object"){
elementCB = options;
options = callback;
callback = null;
} else if(typeof options === "function"){
elementCB = options;
options = defaultOpts;
}
this._callback = callback;
this._options = options || defaultOpts;
this._elementCB = elementCB;
this.dom = [];
this._done = false;
this._tagStack = [];
this._parser = this._parser || null;
}
//default options
var defaultOpts = {
normalizeWhitespace: false, //Replace all whitespace with single spaces
withStartIndices: false, //Add startIndex properties to nodes
withEndIndices: false, //Add endIndex properties to nodes
};
DomHandler.prototype.onparserinit = function(parser){
this._parser = parser;
};
//Resets the handler back to starting state
DomHandler.prototype.onreset = function(){
DomHandler.call(this, this._callback, this._options, this._elementCB);
};
//Signals the handler that parsing is done
DomHandler.prototype.onend = function(){
if(this._done) return;
this._done = true;
this._parser = null;
this._handleCallback(null);
};
DomHandler.prototype._handleCallback =
DomHandler.prototype.onerror = function(error){
if(typeof this._callback === "function"){
this._callback(error, this.dom);
} else {
if(error) throw error;
}
};
DomHandler.prototype.onclosetag = function(){
//if(this._tagStack.pop().name !== name) this._handleCallback(Error("Tagname didn't match!"));
var elem = this._tagStack.pop();
if(this._options.withEndIndices && elem){
elem.endIndex = this._parser.endIndex;
}
if(this._elementCB) this._elementCB(elem);
};
DomHandler.prototype._createDomElement = function(properties){
if (!this._options.withDomLvl1) return properties;
var element;
if (properties.type === "tag") {
element = Object.create(ElementPrototype);
} else {
element = Object.create(NodePrototype);
}
for (var key in properties) {
if (properties.hasOwnProperty(key)) {
element[key] = properties[key];
}
}
return element;
};
DomHandler.prototype._addDomElement = function(element){
var parent = this._tagStack[this._tagStack.length - 1];
var siblings = parent ? parent.children : this.dom;
var previousSibling = siblings[siblings.length - 1];
element.next = null;
if(this._options.withStartIndices){
element.startIndex = this._parser.startIndex;
}
if(this._options.withEndIndices){
element.endIndex = this._parser.endIndex;
}
if(previousSibling){
element.prev = previousSibling;
previousSibling.next = element;
} else {
element.prev = null;
}
siblings.push(element);
element.parent = parent || null;
};
DomHandler.prototype.onopentag = function(name, attribs){
var properties = {
type: name === "script" ? ElementType.Script : name === "style" ? ElementType.Style : ElementType.Tag,
name: name,
attribs: attribs,
children: []
};
var element = this._createDomElement(properties);
this._addDomElement(element);
this._tagStack.push(element);
};
DomHandler.prototype.ontext = function(data){
//the ignoreWhitespace is officially dropped, but for now,
//it's an alias for normalizeWhitespace
var normalize = this._options.normalizeWhitespace || this._options.ignoreWhitespace;
var lastTag;
if(!this._tagStack.length && this.dom.length && (lastTag = this.dom[this.dom.length-1]).type === ElementType.Text){
if(normalize){
lastTag.data = (lastTag.data + data).replace(re_whitespace, " ");
} else {
lastTag.data += data;
}
} else {
if(
this._tagStack.length &&
(lastTag = this._tagStack[this._tagStack.length - 1]) &&
(lastTag = lastTag.children[lastTag.children.length - 1]) &&
lastTag.type === ElementType.Text
){
if(normalize){
lastTag.data = (lastTag.data + data).replace(re_whitespace, " ");
} else {
lastTag.data += data;
}
} else {
if(normalize){
data = data.replace(re_whitespace, " ");
}
var element = this._createDomElement({
data: data,
type: ElementType.Text
});
this._addDomElement(element);
}
}
};
DomHandler.prototype.oncomment = function(data){
var lastTag = this._tagStack[this._tagStack.length - 1];
if(lastTag && lastTag.type === ElementType.Comment){
lastTag.data += data;
return;
}
var properties = {
data: data,
type: ElementType.Comment
};
var element = this._createDomElement(properties);
this._addDomElement(element);
this._tagStack.push(element);
};
DomHandler.prototype.oncdatastart = function(){
var properties = {
children: [{
data: "",
type: ElementType.Text
}],
type: ElementType.CDATA
};
var element = this._createDomElement(properties);
this._addDomElement(element);
this._tagStack.push(element);
};
DomHandler.prototype.oncommentend = DomHandler.prototype.oncdataend = function(){
this._tagStack.pop();
};
DomHandler.prototype.onprocessinginstruction = function(name, data){
var element = this._createDomElement({
name: name,
data: data,
type: ElementType.Directive
});
this._addDomElement(element);
};
module.exports = DomHandler;
|
