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77 lines
2.1 KiB
77 lines
2.1 KiB
11 years ago
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/**
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* Pad `str` up to total length `max` with `chr`.
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* If `str` is longer than `max`, padRight will return `str` unaltered.
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*
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* @param String str string to pad
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* @param Number max total length of output string
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* @param String chr optional. Character to pad with. default: ' '
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* @return String padded str
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*/
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function padRight(str, max, chr) {
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str = str != null ? str : ''
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str = String(str)
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var length = 1 + max - str.length
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if (length <= 0) return str
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return str + Array.apply(null, {length: length})
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.join(chr || ' ')
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}
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/**
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* Split a String `str` into lines of maxiumum length `max`.
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* Splits on word boundaries.
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*
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* @param String str string to split
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* @param Number max length of each line
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* @return Array Array containing lines.
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*/
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function splitIntoLines(str, max) {
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return str.trim().split(' ').reduce(function(lines, word) {
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var line = lines[lines.length - 1]
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if (line && line.join(' ').length + word.length < max) {
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lines[lines.length - 1].push(word) // add to line
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}
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else lines.push([word]) // new line
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return lines
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}, []).map(function(l) {
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return l.join(' ')
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})
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}
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/**
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* Add spaces and `truncationChar` between words of
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* `str` which are longer than `max`.
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*
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* @param String str string to split
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* @param Number max length of each line
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* @param Number truncationChar character to append to split words
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* @return String
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*/
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function splitLongWords(str, max, truncationChar, result) {
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str = str.trim()
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result = result || []
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if (!str) return result.join(' ') || ''
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var words = str.split(' ')
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var word = words.shift() || str
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if (word.length > max) {
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var remainder = word.slice(max - truncationChar.length) // get remainder
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words.unshift(remainder) // save remainder for next loop
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word = word.slice(0, max - truncationChar.length) // grab truncated word
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word += truncationChar // add trailing … or whatever
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}
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result.push(word)
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return splitLongWords(words.join(' '), max, truncationChar, result)
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}
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/**
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* Exports
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*/
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module.exports.padRight = padRight
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module.exports.splitIntoLines = splitIntoLines
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module.exports.splitLongWords = splitLongWords
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