/*------------------------------------------------------------------------------
Developed by Chinh Do - EDGE-ASIA - www.edge-asia.com
String Utilities
Copyright: (c) 2009 EDGE-ASIA
------------------------------------------------------------------------------*/

function leftTrim(orgString){
	var s = orgString;

	while(s.length > 0 && s.charAt(0) == " ")
		s = s.substring(1);	
	return s;
}

function rightTrim(orgString){
	var s = orgString;

	while(s.length > 0 && s.charAt(s.length-1) == " ")
		s = s.substring(0, s.length - 1);	
		
	return s;		
}

function trim(orgString){
	var s = orgString;

	s = leftTrim(s);
	s = rightTrim(s);
	return s;
}

function FormatLeadingZero(p_val, p_res_len)
{
	var res = p_val;
	if (p_res_len==null) p_res_len=2;
	p_val = new String(p_val);
	p_res_len = new Number(p_res_len);
	if (p_val.length>=p_res_len) return p_val;
	if (p_val.length<p_res_len)
	{
		for (var i=0; i<p_res_len-p_val.length; i++)
		{
			res = "0" + res;
		}
		return res;
	}
}

function get_html_translation_table(table, quote_style) {
    // http://kevin.vanzonneveld.net
    // +   original by: Philip Peterson
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: noname
    // +   bugfixed by: Alex
    // +   bugfixed by: Marco
    // +   bugfixed by: madipta
    // +   improved by: KELAN
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // +    bugfixed by: Brett Zamir (http://brett-zamir.me)
    // %          note: It has been decided that we're not going to add global
    // %          note: dependencies to php.js. Meaning the constants are not
    // %          note: real constants, but strings instead. integers are also supported if someone
    // %          note: chooses to create the constants themselves.
    // *     example 1: get_html_translation_table('HTML_SPECIALCHARS');
    // *     returns 1: {'"': '&quot;', '&': '&amp;', '<': '&lt;', '>': '&gt;'}
    
    var entities = {}, histogram = {}, decimal = 0, symbol = '';
    var constMappingTable = {}, constMappingQuoteStyle = {};
    var useTable = {}, useQuoteStyle = {};
    
    // Translate arguments
    constMappingTable[0]      = 'HTML_SPECIALCHARS';
    constMappingTable[1]      = 'HTML_ENTITIES';
    constMappingQuoteStyle[0] = 'ENT_NOQUOTES';
    constMappingQuoteStyle[2] = 'ENT_COMPAT';
    constMappingQuoteStyle[3] = 'ENT_QUOTES';
 
    useTable       = !isNaN(table) ? constMappingTable[table] : table ? table.toUpperCase() : 'HTML_SPECIALCHARS';
    useQuoteStyle = !isNaN(quote_style) ? constMappingQuoteStyle[quote_style] : quote_style ? quote_style.toUpperCase() : 'ENT_COMPAT';
 
    if (useTable !== 'HTML_SPECIALCHARS' && useTable !== 'HTML_ENTITIES') {
        throw new Error("Table: "+useTable+' not supported');
        // return false;
    }
 
    if (useTable === 'HTML_ENTITIES') {
        entities['160'] = '&nbsp;';
        entities['161'] = '&iexcl;';
        entities['162'] = '&cent;';
        entities['163'] = '&pound;';
        entities['164'] = '&curren;';
        entities['165'] = '&yen;';
        entities['166'] = '&brvbar;';
        entities['167'] = '&sect;';
        entities['168'] = '&uml;';
        entities['169'] = '&copy;';
        entities['170'] = '&ordf;';
        entities['171'] = '&laquo;';
        entities['172'] = '&not;';
        entities['173'] = '&shy;';
        entities['174'] = '&reg;';
        entities['175'] = '&macr;';
        entities['176'] = '&deg;';
        entities['177'] = '&plusmn;';
        entities['178'] = '&sup2;';
        entities['179'] = '&sup3;';
        entities['180'] = '&acute;';
        entities['181'] = '&micro;';
        entities['182'] = '&para;';
        entities['183'] = '&middot;';
        entities['184'] = '&cedil;';
        entities['185'] = '&sup1;';
        entities['186'] = '&ordm;';
        entities['187'] = '&raquo;';
        entities['188'] = '&frac14;';
        entities['189'] = '&frac12;';
        entities['190'] = '&frac34;';
        entities['191'] = '&iquest;';
        entities['192'] = '&Agrave;';
        entities['193'] = '&Aacute;';
        entities['194'] = '&Acirc;';
        entities['195'] = '&Atilde;';
        entities['196'] = '&Auml;';
        entities['197'] = '&Aring;';
        entities['198'] = '&AElig;';
        entities['199'] = '&Ccedil;';
        entities['200'] = '&Egrave;';
        entities['201'] = '&Eacute;';
        entities['202'] = '&Ecirc;';
        entities['203'] = '&Euml;';
        entities['204'] = '&Igrave;';
        entities['205'] = '&Iacute;';
        entities['206'] = '&Icirc;';
        entities['207'] = '&Iuml;';
        entities['208'] = '&ETH;';
        entities['209'] = '&Ntilde;';
        entities['210'] = '&Ograve;';
        entities['211'] = '&Oacute;';
        entities['212'] = '&Ocirc;';
        entities['213'] = '&Otilde;';
        entities['214'] = '&Ouml;';
        entities['215'] = '&times;';
        entities['216'] = '&Oslash;';
        entities['217'] = '&Ugrave;';
        entities['218'] = '&Uacute;';
        entities['219'] = '&Ucirc;';
        entities['220'] = '&Uuml;';
        entities['221'] = '&Yacute;';
        entities['222'] = '&THORN;';
        entities['223'] = '&szlig;';
        entities['224'] = '&agrave;';
        entities['225'] = '&aacute;';
        entities['226'] = '&acirc;';
        entities['227'] = '&atilde;';
        entities['228'] = '&auml;';
        entities['229'] = '&aring;';
        entities['230'] = '&aelig;';
        entities['231'] = '&ccedil;';
        entities['232'] = '&egrave;';
        entities['233'] = '&eacute;';
        entities['234'] = '&ecirc;';
        entities['235'] = '&euml;';
        entities['236'] = '&igrave;';
        entities['237'] = '&iacute;';
        entities['238'] = '&icirc;';
        entities['239'] = '&iuml;';
        entities['240'] = '&eth;';
        entities['241'] = '&ntilde;';
        entities['242'] = '&ograve;';
        entities['243'] = '&oacute;';
        entities['244'] = '&ocirc;';
        entities['245'] = '&otilde;';
        entities['246'] = '&ouml;';
        entities['247'] = '&divide;';
        entities['248'] = '&oslash;';
        entities['249'] = '&ugrave;';
        entities['250'] = '&uacute;';
        entities['251'] = '&ucirc;';
        entities['252'] = '&uuml;';
        entities['253'] = '&yacute;';
        entities['254'] = '&thorn;';
        entities['255'] = '&yuml;';
    }
 
    if (useQuoteStyle !== 'ENT_NOQUOTES') {
        entities['34'] = '&quot;';
    }
    if (useQuoteStyle === 'ENT_QUOTES') {
        entities['39'] = '&#39;';
    }
    entities['60'] = '&lt;';
    entities['62'] = '&gt;';
 
    // ascii decimals for better compatibility
    entities['38'] = '&amp;';
 
    // ascii decimals to real symbols
    for (decimal in entities) {
        symbol = String.fromCharCode(decimal);
        histogram[symbol] = entities[decimal];
    }
    
    return histogram;
}

function html_entity_decode( string, quote_style ) {
    // http://kevin.vanzonneveld.net
    // +   original by: john (http://www.jd-tech.net)
    // +      input by: ger
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Onno Marsman
    // +   improved by: marc andreu
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    bugfixed by: Brett Zamir (http://brett-zamir.me)
    // -    depends on: get_html_translation_table
    // *     example 1: html_entity_decode('Kevin &amp; van Zonneveld');
    // *     returns 1: 'Kevin & van Zonneveld'
    // *     example 2: html_entity_decode('&amp;lt;');
    // *     returns 2: '&lt;'
 
    var histogram = {}, symbol = '', tmp_str = '', entity = '';
    tmp_str = string.toString();
    
    if (false === (histogram = this.get_html_translation_table('HTML_ENTITIES', quote_style))) {
        return false;
    }
 
    for (symbol in histogram) {
        entity = histogram[symbol];
        tmp_str = tmp_str.split(entity).join(symbol);
    }
    tmp_str = tmp_str.split('&#039;').join("'");
    
    return tmp_str;
}

function XMLtoString(elem){
	
	var serialized;
	
	try {
		// XMLSerializer exists in current Mozilla browsers
		serializer = new XMLSerializer();
		serialized = serializer.serializeToString(elem);
	} 
	catch (e) {
		// Internet Explorer has a different approach to serializing XML
		serialized = elem.xml;
	}
	
	return serialized;
}
