source: trip-planner-front/node_modules/wrap-ansi/index.js@ bdd6491

Last change on this file since bdd6491 was e29cc2e, checked in by Ema <ema_spirova@…>, 3 years ago

primeNG components

  • Property mode set to 100644
File size: 4.6 KB
Line 
1'use strict';
2const stringWidth = require('string-width');
3const stripAnsi = require('strip-ansi');
4const ansiStyles = require('ansi-styles');
5
6const ESCAPES = new Set([
7 '\u001B',
8 '\u009B'
9]);
10
11const END_CODE = 39;
12
13const wrapAnsi = code => `${ESCAPES.values().next().value}[${code}m`;
14
15// Calculate the length of words split on ' ', ignoring
16// the extra characters added by ansi escape codes
17const wordLengths = string => string.split(' ').map(character => stringWidth(character));
18
19// Wrap a long word across multiple rows
20// Ansi escape codes do not count towards length
21const wrapWord = (rows, word, columns) => {
22 const characters = [...word];
23
24 let insideEscape = false;
25 let visible = stringWidth(stripAnsi(rows[rows.length - 1]));
26
27 for (const [index, character] of characters.entries()) {
28 const characterLength = stringWidth(character);
29
30 if (visible + characterLength <= columns) {
31 rows[rows.length - 1] += character;
32 } else {
33 rows.push(character);
34 visible = 0;
35 }
36
37 if (ESCAPES.has(character)) {
38 insideEscape = true;
39 } else if (insideEscape && character === 'm') {
40 insideEscape = false;
41 continue;
42 }
43
44 if (insideEscape) {
45 continue;
46 }
47
48 visible += characterLength;
49
50 if (visible === columns && index < characters.length - 1) {
51 rows.push('');
52 visible = 0;
53 }
54 }
55
56 // It's possible that the last row we copy over is only
57 // ansi escape characters, handle this edge-case
58 if (!visible && rows[rows.length - 1].length > 0 && rows.length > 1) {
59 rows[rows.length - 2] += rows.pop();
60 }
61};
62
63// Trims spaces from a string ignoring invisible sequences
64const stringVisibleTrimSpacesRight = str => {
65 const words = str.split(' ');
66 let last = words.length;
67
68 while (last > 0) {
69 if (stringWidth(words[last - 1]) > 0) {
70 break;
71 }
72
73 last--;
74 }
75
76 if (last === words.length) {
77 return str;
78 }
79
80 return words.slice(0, last).join(' ') + words.slice(last).join('');
81};
82
83// The wrap-ansi module can be invoked
84// in either 'hard' or 'soft' wrap mode
85//
86// 'hard' will never allow a string to take up more
87// than columns characters
88//
89// 'soft' allows long words to expand past the column length
90const exec = (string, columns, options = {}) => {
91 if (options.trim !== false && string.trim() === '') {
92 return '';
93 }
94
95 let pre = '';
96 let ret = '';
97 let escapeCode;
98
99 const lengths = wordLengths(string);
100 let rows = [''];
101
102 for (const [index, word] of string.split(' ').entries()) {
103 if (options.trim !== false) {
104 rows[rows.length - 1] = rows[rows.length - 1].trimLeft();
105 }
106
107 let rowLength = stringWidth(rows[rows.length - 1]);
108
109 if (index !== 0) {
110 if (rowLength >= columns && (options.wordWrap === false || options.trim === false)) {
111 // If we start with a new word but the current row length equals the length of the columns, add a new row
112 rows.push('');
113 rowLength = 0;
114 }
115
116 if (rowLength > 0 || options.trim === false) {
117 rows[rows.length - 1] += ' ';
118 rowLength++;
119 }
120 }
121
122 // In 'hard' wrap mode, the length of a line is
123 // never allowed to extend past 'columns'
124 if (options.hard && lengths[index] > columns) {
125 const remainingColumns = (columns - rowLength);
126 const breaksStartingThisLine = 1 + Math.floor((lengths[index] - remainingColumns - 1) / columns);
127 const breaksStartingNextLine = Math.floor((lengths[index] - 1) / columns);
128 if (breaksStartingNextLine < breaksStartingThisLine) {
129 rows.push('');
130 }
131
132 wrapWord(rows, word, columns);
133 continue;
134 }
135
136 if (rowLength + lengths[index] > columns && rowLength > 0 && lengths[index] > 0) {
137 if (options.wordWrap === false && rowLength < columns) {
138 wrapWord(rows, word, columns);
139 continue;
140 }
141
142 rows.push('');
143 }
144
145 if (rowLength + lengths[index] > columns && options.wordWrap === false) {
146 wrapWord(rows, word, columns);
147 continue;
148 }
149
150 rows[rows.length - 1] += word;
151 }
152
153 if (options.trim !== false) {
154 rows = rows.map(stringVisibleTrimSpacesRight);
155 }
156
157 pre = rows.join('\n');
158
159 for (const [index, character] of [...pre].entries()) {
160 ret += character;
161
162 if (ESCAPES.has(character)) {
163 const code = parseFloat(/\d[^m]*/.exec(pre.slice(index, index + 4)));
164 escapeCode = code === END_CODE ? null : code;
165 }
166
167 const code = ansiStyles.codes.get(Number(escapeCode));
168
169 if (escapeCode && code) {
170 if (pre[index + 1] === '\n') {
171 ret += wrapAnsi(code);
172 } else if (character === '\n') {
173 ret += wrapAnsi(escapeCode);
174 }
175 }
176 }
177
178 return ret;
179};
180
181// For each newline, invoke the method separately
182module.exports = (string, columns, options) => {
183 return String(string)
184 .normalize()
185 .split('\n')
186 .map(line => exec(line, columns, options))
187 .join('\n');
188};
Note: See TracBrowser for help on using the repository browser.