ce4c83ff
 wxy
初始提交
|
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
|
/*jshint node:true */
/*
The MIT License (MIT)
Copyright (c) 2007-2018 Einar Lielmanis, Liam Newman, and contributors.
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
'use strict';
var InputScanner = require('../core/inputscanner').InputScanner;
var Token = require('../core/token').Token;
var TokenStream = require('../core/tokenstream').TokenStream;
var TOKEN = {
START: 'TK_START',
RAW: 'TK_RAW',
EOF: 'TK_EOF'
};
var Tokenizer = function(input_string, options) {
this._input = new InputScanner(input_string);
this._options = options || {};
this.__tokens = null;
this.__newline_count = 0;
this.__whitespace_before_token = '';
this._whitespace_pattern = /[\n\r\t ]+/g;
this._newline_pattern = /([^\n\r]*)(\r\n|[\n\r])?/g;
};
Tokenizer.prototype.tokenize = function() {
this._input.restart();
this.__tokens = new TokenStream();
this._reset();
var current;
var previous = new Token(TOKEN.START, '');
var open_token = null;
var open_stack = [];
var comments = new TokenStream();
while (previous.type !== TOKEN.EOF) {
current = this._get_next_token(previous, open_token);
while (this._is_comment(current)) {
comments.add(current);
current = this._get_next_token(previous, open_token);
}
if (!comments.isEmpty()) {
current.comments_before = comments;
comments = new TokenStream();
}
current.parent = open_token;
if (this._is_opening(current)) {
open_stack.push(open_token);
open_token = current;
} else if (open_token && this._is_closing(current, open_token)) {
current.opened = open_token;
open_token.closed = current;
open_token = open_stack.pop();
current.parent = open_token;
}
current.previous = previous;
previous.next = current;
this.__tokens.add(current);
previous = current;
}
return this.__tokens;
};
Tokenizer.prototype._is_first_token = function() {
return this.__tokens.isEmpty();
};
Tokenizer.prototype._reset = function() {};
Tokenizer.prototype._get_next_token = function(previous_token, open_token) { // jshint unused:false
this._readWhitespace();
var resulting_string = this._input.read(/.+/g);
if (resulting_string) {
return this._create_token(TOKEN.RAW, resulting_string);
} else {
return this._create_token(TOKEN.EOF, '');
}
};
Tokenizer.prototype._is_comment = function(current_token) { // jshint unused:false
return false;
};
Tokenizer.prototype._is_opening = function(current_token) { // jshint unused:false
return false;
};
Tokenizer.prototype._is_closing = function(current_token, open_token) { // jshint unused:false
return false;
};
Tokenizer.prototype._create_token = function(type, text) {
var token = new Token(type, text, this.__newline_count, this.__whitespace_before_token);
this.__newline_count = 0;
this.__whitespace_before_token = '';
return token;
};
Tokenizer.prototype._readWhitespace = function() {
var resulting_string = this._input.read(this._whitespace_pattern);
if (resulting_string === ' ') {
this.__whitespace_before_token = resulting_string;
} else if (resulting_string !== '') {
this._newline_pattern.lastIndex = 0;
var nextMatch = this._newline_pattern.exec(resulting_string);
while (nextMatch[2]) {
this.__newline_count += 1;
nextMatch = this._newline_pattern.exec(resulting_string);
}
this.__whitespace_before_token = nextMatch[1];
}
};
module.exports.Tokenizer = Tokenizer;
module.exports.TOKEN = TOKEN;
|
