61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
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/*!
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* condense-newlines <https://github.com/jonschlinkert/condense-newlines>
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*
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* Copyright (c) 2014 Jon Schlinkert, contributors.
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* Licensed under the MIT License
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*/
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'use strict';
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var isWhitespace = require('is-whitespace');
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var extend = require('extend-shallow');
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var typeOf = require('kind-of');
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module.exports = function(str, options) {
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var opts = extend({}, options);
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var sep = opts.sep || '\n\n';
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var min = opts.min;
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var re;
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if (typeof min === 'number' && min !== 2) {
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re = new RegExp('(\\r\\n|\\n|\\u2424) {' + min + ',}');
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}
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if (typeof re === 'undefined') {
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re = opts.regex || /(\r\n|\n|\u2424){2,}/g;
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}
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// if a line is 100% whitespace it will be trimmed, so that
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// later we can condense newlines correctly
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if (opts.keepWhitespace !== true) {
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str = str.split('\n').map(function(line) {
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return isWhitespace(line) ? line.trim() : line;
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}).join('\n');
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}
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str = trailingNewline(str, opts);
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return str.replace(re, sep);
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};
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function trailingNewline(str, options) {
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var val = options.trailingNewline;
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if (val === false) {
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return str;
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}
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switch (typeOf(val)) {
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case 'string':
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str = str.replace(/\s+$/, options.trailingNewline);
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break;
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case 'function':
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str = options.trailingNewline(str);
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break;
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case 'undefined':
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case 'boolean':
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default: {
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str = str.replace(/\s+$/, '\n');
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break;
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}
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}
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return str;
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}
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