blob: dc83486126112ce488d533e1f5ec9fa98d0dd8e7 (
plain)
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
|
/**
* @author Titus Wormer
* @copyright 2015 Titus Wormer
* @license MIT
* @module remark:parse:unescape
* @fileoverview Unescape escapes.
*/
'use strict';
/* Expose. */
module.exports = factory;
/* Factory to de-escape a value, based on a list at `key`
* in `ctx`. */
function factory(ctx, key) {
return unescape;
/* De-escape a string using the expression at `key`
* in `ctx`. */
function unescape(value) {
var prev = 0;
var index = value.indexOf('\\');
var escape = ctx[key];
var queue = [];
var character;
while (index !== -1) {
queue.push(value.slice(prev, index));
prev = index + 1;
character = value.charAt(prev);
/* If the following character is not a valid escape,
* add the slash. */
if (!character || escape.indexOf(character) === -1) {
queue.push('\\');
}
index = value.indexOf('\\', prev);
}
queue.push(value.slice(prev));
return queue.join('');
}
}
|
