source: trip-planner-front/node_modules/snapdragon/lib/source-maps.js

Last change on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1'use strict';
2
3var fs = require('fs');
4var path = require('path');
5var define = require('define-property');
6var utils = require('./utils');
7
8/**
9 * Expose `mixin()`.
10 * This code is based on `source-maps-support.js` in reworkcss/css
11 * https://github.com/reworkcss/css/blob/master/lib/stringify/source-map-support.js
12 * Copyright (c) 2012 TJ Holowaychuk <tj@vision-media.ca>
13 */
14
15module.exports = mixin;
16
17/**
18 * Mixin source map support into `compiler`.
19 *
20 * @param {Object} `compiler`
21 * @api public
22 */
23
24function mixin(compiler) {
25 define(compiler, '_comment', compiler.comment);
26 compiler.map = new utils.SourceMap.SourceMapGenerator();
27 compiler.position = { line: 1, column: 1 };
28 compiler.content = {};
29 compiler.files = {};
30
31 for (var key in exports) {
32 define(compiler, key, exports[key]);
33 }
34}
35
36/**
37 * Update position.
38 *
39 * @param {String} str
40 */
41
42exports.updatePosition = function(str) {
43 var lines = str.match(/\n/g);
44 if (lines) this.position.line += lines.length;
45 var i = str.lastIndexOf('\n');
46 this.position.column = ~i ? str.length - i : this.position.column + str.length;
47};
48
49/**
50 * Emit `str` with `position`.
51 *
52 * @param {String} str
53 * @param {Object} [pos]
54 * @return {String}
55 */
56
57exports.emit = function(str, node) {
58 var position = node.position || {};
59 var source = position.source;
60 if (source) {
61 if (position.filepath) {
62 source = utils.unixify(position.filepath);
63 }
64
65 this.map.addMapping({
66 source: source,
67 generated: {
68 line: this.position.line,
69 column: Math.max(this.position.column - 1, 0)
70 },
71 original: {
72 line: position.start.line,
73 column: position.start.column - 1
74 }
75 });
76
77 if (position.content) {
78 this.addContent(source, position);
79 }
80 if (position.filepath) {
81 this.addFile(source, position);
82 }
83
84 this.updatePosition(str);
85 this.output += str;
86 }
87 return str;
88};
89
90/**
91 * Adds a file to the source map output if it has not already been added
92 * @param {String} `file`
93 * @param {Object} `pos`
94 */
95
96exports.addFile = function(file, position) {
97 if (typeof position.content !== 'string') return;
98 if (Object.prototype.hasOwnProperty.call(this.files, file)) return;
99 this.files[file] = position.content;
100};
101
102/**
103 * Adds a content source to the source map output if it has not already been added
104 * @param {String} `source`
105 * @param {Object} `position`
106 */
107
108exports.addContent = function(source, position) {
109 if (typeof position.content !== 'string') return;
110 if (Object.prototype.hasOwnProperty.call(this.content, source)) return;
111 this.map.setSourceContent(source, position.content);
112};
113
114/**
115 * Applies any original source maps to the output and embeds the source file
116 * contents in the source map.
117 */
118
119exports.applySourceMaps = function() {
120 Object.keys(this.files).forEach(function(file) {
121 var content = this.files[file];
122 this.map.setSourceContent(file, content);
123
124 if (this.options.inputSourcemaps === true) {
125 var originalMap = utils.sourceMapResolve.resolveSync(content, file, fs.readFileSync);
126 if (originalMap) {
127 var map = new utils.SourceMap.SourceMapConsumer(originalMap.map);
128 var relativeTo = originalMap.sourcesRelativeTo;
129 this.map.applySourceMap(map, file, utils.unixify(path.dirname(relativeTo)));
130 }
131 }
132 }, this);
133};
134
135/**
136 * Process comments, drops sourceMap comments.
137 * @param {Object} node
138 */
139
140exports.comment = function(node) {
141 if (/^# sourceMappingURL=/.test(node.comment)) {
142 return this.emit('', node.position);
143 }
144 return this._comment(node);
145};
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