AlkantarClanX12
Current Path : /lib/node_modules/npm/node_modules/wrap-ansi/ |
Current File : //lib/node_modules/npm/node_modules/wrap-ansi/index.js |
'use strict'; const stringWidth = require('string-width'); const stripAnsi = require('strip-ansi'); const ansiStyles = require('ansi-styles'); const ESCAPES = new Set([ '\u001B', '\u009B' ]); const END_CODE = 39; const wrapAnsi = code => `${ESCAPES.values().next().value}[${code}m`; // Calculate the length of words split on ' ', ignoring // the extra characters added by ansi escape codes const wordLengths = string => string.split(' ').map(character => stringWidth(character)); // Wrap a long word across multiple rows // Ansi escape codes do not count towards length const wrapWord = (rows, word, columns) => { const characters = [...word]; let insideEscape = false; let visible = stringWidth(stripAnsi(rows[rows.length - 1])); for (const [index, character] of characters.entries()) { const characterLength = stringWidth(character); if (visible + characterLength <= columns) { rows[rows.length - 1] += character; } else { rows.push(character); visible = 0; } if (ESCAPES.has(character)) { insideEscape = true; } else if (insideEscape && character === 'm') { insideEscape = false; continue; } if (insideEscape) { continue; } visible += characterLength; if (visible === columns && index < characters.length - 1) { rows.push(''); visible = 0; } } // It's possible that the last row we copy over is only // ansi escape characters, handle this edge-case if (!visible && rows[rows.length - 1].length > 0 && rows.length > 1) { rows[rows.length - 2] += rows.pop(); } }; // Trims spaces from a string ignoring invisible sequences const stringVisibleTrimSpacesRight = str => { const words = str.split(' '); let last = words.length; while (last > 0) { if (stringWidth(words[last - 1]) > 0) { break; } last--; } if (last === words.length) { return str; } return words.slice(0, last).join(' ') + words.slice(last).join(''); }; // The wrap-ansi module can be invoked // in either 'hard' or 'soft' wrap mode // // 'hard' will never allow a string to take up more // than columns characters // // 'soft' allows long words to expand past the column length const exec = (string, columns, options = {}) => { if (options.trim !== false && string.trim() === '') { return ''; } let pre = ''; let ret = ''; let escapeCode; const lengths = wordLengths(string); let rows = ['']; for (const [index, word] of string.split(' ').entries()) { if (options.trim !== false) { rows[rows.length - 1] = rows[rows.length - 1].trimLeft(); } let rowLength = stringWidth(rows[rows.length - 1]); if (index !== 0) { if (rowLength >= columns && (options.wordWrap === false || options.trim === false)) { // If we start with a new word but the current row length equals the length of the columns, add a new row rows.push(''); rowLength = 0; } if (rowLength > 0 || options.trim === false) { rows[rows.length - 1] += ' '; rowLength++; } } // In 'hard' wrap mode, the length of a line is // never allowed to extend past 'columns' if (options.hard && lengths[index] > columns) { const remainingColumns = (columns - rowLength); const breaksStartingThisLine = 1 + Math.floor((lengths[index] - remainingColumns - 1) / columns); const breaksStartingNextLine = Math.floor((lengths[index] - 1) / columns); if (breaksStartingNextLine < breaksStartingThisLine) { rows.push(''); } wrapWord(rows, word, columns); continue; } if (rowLength + lengths[index] > columns && rowLength > 0 && lengths[index] > 0) { if (options.wordWrap === false && rowLength < columns) { wrapWord(rows, word, columns); continue; } rows.push(''); } if (rowLength + lengths[index] > columns && options.wordWrap === false) { wrapWord(rows, word, columns); continue; } rows[rows.length - 1] += word; } if (options.trim !== false) { rows = rows.map(stringVisibleTrimSpacesRight); } pre = rows.join('\n'); for (const [index, character] of [...pre].entries()) { ret += character; if (ESCAPES.has(character)) { const code = parseFloat(/\d[^m]*/.exec(pre.slice(index, index + 4))); escapeCode = code === END_CODE ? null : code; } const code = ansiStyles.codes.get(Number(escapeCode)); if (escapeCode && code) { if (pre[index + 1] === '\n') { ret += wrapAnsi(code); } else if (character === '\n') { ret += wrapAnsi(escapeCode); } } } return ret; }; // For each newline, invoke the method separately module.exports = (string, columns, options) => { return String(string) .normalize() .split('\n') .map(line => exec(line, columns, options)) .join('\n'); };