Created
June 10, 2012 08:59
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break text into lines of length n
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| // a bit messy and not optimized, but handy for basic formatting of short blocks of text | |
| function splitToLines (string, leftMarginWidth, maxLineWidth) { | |
| var lines = [], | |
| line = [], | |
| padding = Array(leftMarginWidth).join(' '), | |
| i = 0, // cursor | |
| p = 0, // left anchor | |
| m = 0, // counter for searching 5 char wrap zone | |
| s, // tmpvar | |
| l = string.length, | |
| mLen = maxLineWidth - leftMarginWidth - 5; | |
| while (l > i) { | |
| i && line.push(padding); | |
| !i && (i = maxLineWidth - 5); | |
| while (i-- > p) { | |
| s = string.charAt(i); | |
| if (s == ' ' || s == '-') { | |
| i++; | |
| break; | |
| } | |
| } | |
| if (i == p) { | |
| i += mLen; | |
| while (string.charAt(i++) != ' ' && 5 > m++); | |
| if (string.charAt(i) != ' ') | |
| break; | |
| else | |
| m = 0; | |
| } | |
| line.push(string.slice(p, i)); | |
| lines.push(line.join('')); | |
| line.length = 0; | |
| p = i; | |
| i += mLen; | |
| } | |
| lines.push(padding + string.slice(p)); | |
| return lines.join('\n'); | |
| } |
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For example:
should result in:
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.