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77 lines
2.2 KiB
77 lines
2.2 KiB
4 years ago
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var wordwrap = module.exports = function (start, stop, params) {
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if (typeof start === 'object') {
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params = start;
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start = params.start;
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stop = params.stop;
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}
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if (typeof stop === 'object') {
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params = stop;
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start = start || params.start;
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stop = undefined;
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}
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if (!stop) {
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stop = start;
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start = 0;
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}
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if (!params) params = {};
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var mode = params.mode || 'soft';
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var re = mode === 'hard' ? /\b/ : /(\S+\s+)/;
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return function (text) {
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var chunks = text.toString()
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.split(re)
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.reduce(function (acc, x) {
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if (mode === 'hard') {
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for (var i = 0; i < x.length; i += stop - start) {
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acc.push(x.slice(i, i + stop - start));
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}
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}
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else acc.push(x)
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return acc;
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}, [])
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;
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return chunks.reduce(function (lines, rawChunk) {
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if (rawChunk === '') return lines;
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var chunk = rawChunk.replace(/\t/g, ' ');
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var i = lines.length - 1;
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if (lines[i].length + chunk.length > stop) {
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lines[i] = lines[i].replace(/\s+$/, '');
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chunk.split(/\n/).forEach(function (c) {
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lines.push(
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new Array(start + 1).join(' ')
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+ c.replace(/^\s+/, '')
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);
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});
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}
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else if (chunk.match(/\n/)) {
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var xs = chunk.split(/\n/);
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lines[i] += xs.shift();
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xs.forEach(function (c) {
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lines.push(
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new Array(start + 1).join(' ')
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+ c.replace(/^\s+/, '')
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);
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});
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}
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else {
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lines[i] += chunk;
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}
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return lines;
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}, [ new Array(start + 1).join(' ') ]).join('\n');
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};
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};
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wordwrap.soft = wordwrap;
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wordwrap.hard = function (start, stop) {
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return wordwrap(start, stop, { mode : 'hard' });
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};
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