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