diff options
author | 2020-11-16 00:10:28 +0100 | |
---|---|---|
committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/wrap-ansi/index.js | |
download | website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.gz website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.bz2 website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.zip |
api, login, auth
Diffstat (limited to 'node_modules/wrap-ansi/index.js')
-rwxr-xr-x | node_modules/wrap-ansi/index.js | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/node_modules/wrap-ansi/index.js b/node_modules/wrap-ansi/index.js new file mode 100755 index 0000000..5038bb0 --- /dev/null +++ b/node_modules/wrap-ansi/index.js @@ -0,0 +1,188 @@ +'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'); +}; |