source: trip-planner-front/node_modules/chalk/templates.js@ 8d391a1

Last change on this file since 8d391a1 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 3.1 KB
Line 
1'use strict';
2const TEMPLATE_REGEX = /(?:\\(u[a-f\d]{4}|x[a-f\d]{2}|.))|(?:\{(~)?(\w+(?:\([^)]*\))?(?:\.\w+(?:\([^)]*\))?)*)(?:[ \t]|(?=\r?\n)))|(\})|((?:.|[\r\n\f])+?)/gi;
3const STYLE_REGEX = /(?:^|\.)(\w+)(?:\(([^)]*)\))?/g;
4const STRING_REGEX = /^(['"])((?:\\.|(?!\1)[^\\])*)\1$/;
5const ESCAPE_REGEX = /\\(u[a-f\d]{4}|x[a-f\d]{2}|.)|([^\\])/gi;
6
7const ESCAPES = new Map([
8 ['n', '\n'],
9 ['r', '\r'],
10 ['t', '\t'],
11 ['b', '\b'],
12 ['f', '\f'],
13 ['v', '\v'],
14 ['0', '\0'],
15 ['\\', '\\'],
16 ['e', '\u001B'],
17 ['a', '\u0007']
18]);
19
20function unescape(c) {
21 if ((c[0] === 'u' && c.length === 5) || (c[0] === 'x' && c.length === 3)) {
22 return String.fromCharCode(parseInt(c.slice(1), 16));
23 }
24
25 return ESCAPES.get(c) || c;
26}
27
28function parseArguments(name, args) {
29 const results = [];
30 const chunks = args.trim().split(/\s*,\s*/g);
31 let matches;
32
33 for (const chunk of chunks) {
34 if (!isNaN(chunk)) {
35 results.push(Number(chunk));
36 } else if ((matches = chunk.match(STRING_REGEX))) {
37 results.push(matches[2].replace(ESCAPE_REGEX, (m, escape, chr) => escape ? unescape(escape) : chr));
38 } else {
39 throw new Error(`Invalid Chalk template style argument: ${chunk} (in style '${name}')`);
40 }
41 }
42
43 return results;
44}
45
46function parseStyle(style) {
47 STYLE_REGEX.lastIndex = 0;
48
49 const results = [];
50 let matches;
51
52 while ((matches = STYLE_REGEX.exec(style)) !== null) {
53 const name = matches[1];
54
55 if (matches[2]) {
56 const args = parseArguments(name, matches[2]);
57 results.push([name].concat(args));
58 } else {
59 results.push([name]);
60 }
61 }
62
63 return results;
64}
65
66function buildStyle(chalk, styles) {
67 const enabled = {};
68
69 for (const layer of styles) {
70 for (const style of layer.styles) {
71 enabled[style[0]] = layer.inverse ? null : style.slice(1);
72 }
73 }
74
75 let current = chalk;
76 for (const styleName of Object.keys(enabled)) {
77 if (Array.isArray(enabled[styleName])) {
78 if (!(styleName in current)) {
79 throw new Error(`Unknown Chalk style: ${styleName}`);
80 }
81
82 if (enabled[styleName].length > 0) {
83 current = current[styleName].apply(current, enabled[styleName]);
84 } else {
85 current = current[styleName];
86 }
87 }
88 }
89
90 return current;
91}
92
93module.exports = (chalk, tmp) => {
94 const styles = [];
95 const chunks = [];
96 let chunk = [];
97
98 // eslint-disable-next-line max-params
99 tmp.replace(TEMPLATE_REGEX, (m, escapeChar, inverse, style, close, chr) => {
100 if (escapeChar) {
101 chunk.push(unescape(escapeChar));
102 } else if (style) {
103 const str = chunk.join('');
104 chunk = [];
105 chunks.push(styles.length === 0 ? str : buildStyle(chalk, styles)(str));
106 styles.push({inverse, styles: parseStyle(style)});
107 } else if (close) {
108 if (styles.length === 0) {
109 throw new Error('Found extraneous } in Chalk template literal');
110 }
111
112 chunks.push(buildStyle(chalk, styles)(chunk.join('')));
113 chunk = [];
114 styles.pop();
115 } else {
116 chunk.push(chr);
117 }
118 });
119
120 chunks.push(chunk.join(''));
121
122 if (styles.length > 0) {
123 const errMsg = `Chalk template literal is missing ${styles.length} closing bracket${styles.length === 1 ? '' : 's'} (\`}\`)`;
124 throw new Error(errMsg);
125 }
126
127 return chunks.join('');
128};
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