dojo.provide("dojo.string.common");

dojo.require("dojo.string");

/**
 * Trim whitespace from 'str'. If 'wh' > 0,
 * only trim from start, if 'wh' < 0, only trim
 * from end, otherwise trim both ends
 */
dojo.string.trim = function(str, wh){
	if(!str.replace){ return str; }
	if(!str.length){ return str; }
	var re = (wh > 0) ? (/^\s+/) : (wh < 0) ? (/\s+$/) : (/^\s+|\s+$/g);
	return str.replace(re, "");
}

/**
 * Trim whitespace at the beginning of 'str'
 */
dojo.string.trimStart = function(str) {
	return dojo.string.trim(str, 1);
}

/**
 * Trim whitespace at the end of 'str'
 */
dojo.string.trimEnd = function(str) {
	return dojo.string.trim(str, -1);
}

/**
 * Return 'str' repeated 'count' times, optionally
 * placing 'separator' between each rep
 */
dojo.string.repeat = function(str, count, separator) {
	var out = "";
	for(var i = 0; i < count; i++) {
		out += str;
		if(separator && i < count - 1) {
			out += separator;
		}
	}
	return out;
}

/**
 * Pad 'str' to guarantee that it is at least 'len' length
 * with the character 'c' at either the start (dir=1) or
 * end (dir=-1) of the string
 */
dojo.string.pad = function(str, len/*=2*/, c/*='0'*/, dir/*=1*/) {
	var out = String(str);
	if(!c) {
		c = '0';
	}
	if(!dir) {
		dir = 1;
	}
	while(out.length < len) {
		if(dir > 0) {
			out = c + out;
		} else {
			out += c;
		}
	}
	return out;
}

/** same as dojo.string.pad(str, len, c, 1) */
dojo.string.padLeft = function(str, len, c) {
	return dojo.string.pad(str, len, c, 1);
}

/** same as dojo.string.pad(str, len, c, -1) */
dojo.string.padRight = function(str, len, c) {
	return dojo.string.pad(str, len, c, -1);
}
