76 lines
2.2 KiB
JavaScript
76 lines
2.2 KiB
JavaScript
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' });
|
|
};
|