diff options
Diffstat (limited to 'node_modules/printable-characters/printable-characters.js')
| -rw-r--r-- | node_modules/printable-characters/printable-characters.js | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/node_modules/printable-characters/printable-characters.js b/node_modules/printable-characters/printable-characters.js new file mode 100644 index 0000000..4478d36 --- /dev/null +++ b/node_modules/printable-characters/printable-characters.js @@ -0,0 +1,44 @@ +"use strict"; + +const ansiEscapeCode = '[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-PRZcf-nqry=><]' + , zeroWidthCharacterExceptNewline = '\u0000-\u0008\u000B-\u0019\u001b\u009b\u00ad\u200b\u2028\u2029\ufeff\ufe00-\ufe0f' + , zeroWidthCharacter = '\n' + zeroWidthCharacterExceptNewline + , zeroWidthCharactersExceptNewline = new RegExp ('(?:' + ansiEscapeCode + ')|[' + zeroWidthCharacterExceptNewline + ']', 'g') + , zeroWidthCharacters = new RegExp ('(?:' + ansiEscapeCode + ')|[' + zeroWidthCharacter + ']', 'g') + , partition = new RegExp ('((?:' + ansiEscapeCode + ')|[\t' + zeroWidthCharacter + '])?([^\t' + zeroWidthCharacter + ']*)', 'g') + +module.exports = { + + zeroWidthCharacters, + + ansiEscapeCodes: new RegExp (ansiEscapeCode, 'g'), + + strlen: s => Array.from (s.replace (zeroWidthCharacters, '')).length, // Array.from solves the emoji problem as described here: http://blog.jonnew.com/posts/poo-dot-length-equals-two + + isBlank: s => s.replace (zeroWidthCharacters, '') + .replace (/\s/g, '') + .length === 0, + + blank: s => Array.from (s.replace (zeroWidthCharactersExceptNewline, '')) // Array.from solves the emoji problem as described here: http://blog.jonnew.com/posts/poo-dot-length-equals-two + .map (x => ((x === '\t') || (x === '\n')) ? x : ' ') + .join (''), + + partition (s) { + for (var m, spans = []; (partition.lastIndex !== s.length) && (m = partition.exec (s));) { spans.push ([m[1] || '', m[2]]) } + partition.lastIndex = 0 // reset + return spans + }, + + first (s, n) { + + let result = '', length = 0 + + for (const [nonPrintable, printable] of module.exports.partition (s)) { + const text = Array.from (printable).slice (0, n - length) // Array.from solves the emoji problem as described here: http://blog.jonnew.com/posts/poo-dot-length-equals-two + result += nonPrintable + text.join ('') + length += text.length + } + + return result + } +}
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