forked from taoqf/node-html-parser
-
-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathmatcher.ts
More file actions
254 lines (248 loc) · 7.04 KB
/
Copy pathmatcher.ts
File metadata and controls
254 lines (248 loc) · 7.04 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
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
249
250
251
252
253
254
import HTMLElement from './nodes/html.js';
interface MatherFunction {
func(el: HTMLElement, tagName: string, classes: string[] | string, attr_key: string, value: string): boolean;
tagName: string;
classes: string | string[];
attr_key: string;
value: string;
}
/**
* Cache to store generated match functions
* @type {Object}
*/
let pMatchFunctionCache = {} as { [name: string]: MatherFunction };
function compare_tagname(tag1: string, tag2: string) {
if (!tag1) {
return !tag2;
}
if (!tag2) {
return !tag1;
}
return tag1.toLowerCase() === tag2.toLowerCase();
}
/**
* Function cache
*/
const functionCache = {
f145(el: HTMLElement, tagName: string, classes: string[]) {
'use strict';
tagName = tagName || '';
classes = classes || [];
if (el.id !== tagName.substr(1)) {
return false;
}
for (let cls = classes, i = 0; i < cls.length; i++) {
if (el.classNames.indexOf(cls[i]) === -1) {
return false;
}
}
return true;
},
f45(el: HTMLElement, tagName: string, classes: string[]) {
'use strict';
tagName = tagName || '';
classes = classes || [];
for (let cls = classes, i = 0; i < cls.length; i++) {
if (el.classNames.indexOf(cls[i]) === -1) {
return false;
}
}
return true;
},
f15(el: HTMLElement, tagName: string) {
'use strict';
tagName = tagName || '';
if (el.id !== tagName.substr(1)) {
return false;
}
return true;
},
f1(el: HTMLElement, tagName: string) {
'use strict';
tagName = tagName || '';
if (el.id !== tagName.substr(1)) {
return false;
}
},
f5() {
'use strict';
return true;
},
f55(el: HTMLElement, tagName: string, classes: string[], attr_key: string) {
'use strict';
tagName = tagName || '';
classes = classes || [];
attr_key = attr_key || '';
const attrs = el.attributes;
return attrs.hasOwnProperty(attr_key);
},
f245(el: HTMLElement, tagName: string, classes: string[], attr_key: string, value: string) {
'use strict';
tagName = tagName || '';
classes = classes || [];
attr_key = (attr_key || '').toLowerCase();
value = value || '';
const attrs = el.attributes;
return Object.keys(attrs).some((key) => {
const val = attrs[key];
return key.toLowerCase() === attr_key && val === value;
});
// for (let cls = classes, i = 0; i < cls.length; i++) {if (el.classNames.indexOf(cls[i]) === -1){ return false;}}
// return true;
},
f25(el: HTMLElement, tagName: string, classes: string[], attr_key: string, value: string) {
'use strict';
tagName = tagName || '';
classes = classes || [];
attr_key = (attr_key || '').toLowerCase();
value = value || '';
const attrs = el.attributes;
return Object.keys(attrs).some((key) => {
const val = attrs[key];
return key.toLowerCase() === attr_key && val === value;
});
// return true;
},
f2(el: HTMLElement, tagName: string, classes: string[], attr_key: string, value: string) {
'use strict';
tagName = tagName || '';
classes = classes || [];
attr_key = (attr_key || '').toLowerCase();
value = value || '';
const attrs = el.attributes;
return Object.keys(attrs).some((key) => {
const val = attrs[key];
return key.toLowerCase() === attr_key && val === value;
});
},
f345(el: HTMLElement, tagName: string, classes: string[]) {
'use strict';
tagName = tagName || '';
classes = classes || [];
if (!compare_tagname(el.tagName, tagName)) {
return false;
}
for (let cls = classes, i = 0; i < cls.length; i++) {
if (el.classNames.indexOf(cls[i]) === -1) {
return false;
}
}
return true;
},
f35(el: HTMLElement, tagName: string) {
'use strict';
tagName = tagName || '';
return compare_tagname(el.tagName, tagName);
},
f3(el: HTMLElement, tagName: string) {
'use strict';
tagName = tagName || '';
// if (el.tagName !== tagName) {
// return false;
// }
return compare_tagname(el.tagName, tagName);
}
};
/**
* Matcher class to make CSS match
*
* @class Matcher
*/
export default class Matcher {
private matchers: MatherFunction[];
private nextMatch = 0;
/**
* Creates an instance of Matcher.
* @param {string} selector
*
* @memberof Matcher
*/
public constructor(selector: string) {
this.matchers = selector.split(' ').map((matcher) => {
if (pMatchFunctionCache[matcher]) {
return pMatchFunctionCache[matcher];
}
const parts = matcher.split('.');
const tagName = parts[0];
const classes = parts.slice(1).sort();
// let source = '"use strict";';
let function_name = 'f';
let attr_key = '';
let value = '';
if (tagName && tagName !== '*') {
if (tagName.startsWith('#')) {
// source += 'if (el.id != ' + JSON.stringify(tagName.substr(1)) + ') return false;';// 1
function_name += '1';
} else {
// https://github.com/taoqf/node-html-parser/issues/86
// const reg = /\[\s*([\w-]+)(\s*=\s*(((?<quote>'|")\s*(.*)(\k<quote>))|(\S*)))?\s*\]/.exec(tagName);
// `[a-b]`,`[ a-b ]`,`[a-b=c]`, `[a-b=c'd]`,`[a-b='c\' d"e ']`,`[ a-b = 'c\' d"e ' ]`,`[a-b="c' d\"e " ]`,`[ a-b = "c' d\"e " ]`
const reg = /\[\s*([\w-]+)(\s*=\s*(('\s*(.*)'|"\s*(.*)")|(\S*)))?\s*\]/.exec(tagName);
if (reg) {
attr_key = reg[1];
value = reg[5] || reg[6] || reg[7];
// source += `let attrs = el.attributes;for (let key in attrs){const val = attrs[key]; if (key == "${attr_key}" && val == "${value}"){return true;}} return false;`;// 2
function_name += '2';
} else {
// source += 'if (el.tagName != ' + JSON.stringify(tagName) + ') return false;';// 3
function_name += '3';
}
}
}
if (classes.length > 0) {
// source += 'for (let cls = ' + JSON.stringify(classes) + ', i = 0; i < cls.length; i++) if (el.classNames.indexOf(cls[i]) === -1) return false;';// 4
function_name += '4';
}
// source += 'return true;';// 5
function_name += '5';
const obj = {
func: functionCache[function_name] as (el: HTMLElement, tagName: string, classes: string | string[], attr_key: string, value: string) => boolean,
tagName: tagName || '',
classes: classes || '',
attr_key: attr_key || '',
value: value || ''
} as MatherFunction;
// source = source || '';
return (pMatchFunctionCache[matcher] = obj);
});
}
/**
* Trying to advance match pointer
* @param {HTMLElement} el element to make the match
* @return {bool} true when pointer advanced.
*/
public advance(el: HTMLElement) {
if (this.nextMatch < this.matchers.length &&
this.matchers[this.nextMatch].func(el, this.matchers[this.nextMatch].tagName, this.matchers[this.nextMatch].classes, this.matchers[this.nextMatch].attr_key, this.matchers[this.nextMatch].value)) {
this.nextMatch++;
return true;
}
return false;
}
/**
* Rewind the match pointer
*/
public rewind() {
this.nextMatch--;
}
/**
* Trying to determine if match made.
* @return {bool} true when the match is made
*/
public get matched() {
return this.nextMatch === this.matchers.length;
}
/**
* Rest match pointer.
* @return {[type]} [description]
*/
public reset() {
this.nextMatch = 0;
}
/**
* flush cache to free memory
*/
public flushCache() {
pMatchFunctionCache = {};
}
}