// Wrap
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// wraps a string by a certain width
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var makeString = require('./helper/makeString');
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module.exports = function wrap(str, options){
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str = makeString(str);
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options = options || {};
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var width = options.width || 75;
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var seperator = options.seperator || '\n';
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var cut = options.cut || false;
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var preserveSpaces = options.preserveSpaces || false;
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var trailingSpaces = options.trailingSpaces || false;
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var result;
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if(width <= 0){
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return str;
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}
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else if(!cut){
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var words = str.split(' ');
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var current_column = 0;
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result = '';
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while(words.length > 0){
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// if adding a space and the next word would cause this line to be longer than width...
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if(1 + words[0].length + current_column > width){
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//start a new line if this line is not already empty
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if(current_column > 0){
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// add a space at the end of the line is preserveSpaces is true
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if (preserveSpaces){
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result += ' ';
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current_column++;
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}
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// fill the rest of the line with spaces if trailingSpaces option is true
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else if(trailingSpaces){
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while(current_column < width){
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result += ' ';
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current_column++;
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}
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}
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//start new line
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result += seperator;
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current_column = 0;
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}
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}
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// if not at the begining of the line, add a space in front of the word
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if(current_column > 0){
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result += ' ';
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current_column++;
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}
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// tack on the next word, update current column, a pop words array
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result += words[0];
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current_column += words[0].length;
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words.shift();
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}
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// fill the rest of the line with spaces if trailingSpaces option is true
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if(trailingSpaces){
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while(current_column < width){
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result += ' ';
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current_column++;
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}
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}
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return result;
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}
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else {
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var index = 0;
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result = '';
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// walk through each character and add seperators where appropriate
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while(index < str.length){
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if(index % width == 0 && index > 0){
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result += seperator;
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}
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result += str.charAt(index);
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index++;
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}
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// fill the rest of the line with spaces if trailingSpaces option is true
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if(trailingSpaces){
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while(index % width > 0){
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result += ' ';
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index++;
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}
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}
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return result;
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}
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};
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