//	Standard Routines for any Page

//	Copyright (c) gaelITech 2009
//	www.gaelitech.ie
//	Modifications:
//	Date		Who				What
//	01/10/2009	Peter McPoland	Release 2

//------------------------- Event Handler Code -------------------------

var		gi_Handler_onbeforeunload_Code = new Array();
var		gi_Handler_onload_Code = new Array();
var		gi_Handler_onresize_Code = new Array();
var		gi_Handler_onunload_Code = new Array();

function	gi_Handler_Add(sType, sCode)
{
	if	(sType == "onbeforeunload")
		gi_Handler_onbeforeunload_Code[gi_Handler_onbeforeunload_Code.length] = sCode;
	else
	if	(sType == "onload")
		gi_Handler_onload_Code[gi_Handler_onload_Code.length] = sCode;
	else
	if	(sType == "onresize")
		gi_Handler_onresize_Code[gi_Handler_onresize_Code.length] = sCode;
	else
	if	(sType == "onunload")
		gi_Handler_onunload_Code[gi_Handler_onunload_Code.length] = sCode;
	else
		alert("Invalid Handler type: "+sType);
}

function	gi_Handler_onbeforeunload()
{
	var	i;
	
	for	(i = 0; i < gi_Handler_onbeforeunload_Code.length; i++)
		eval(gi_Handler_onbeforeunload_Code[i]);
}

function	gi_Handler_onload()
{
	var	i;
	
	for	(i = 0; i < gi_Handler_onload_Code.length; i++)
		eval(gi_Handler_onload_Code[i]);
}

function	gi_Handler_onresize()
{
	var	i;
	
	for	(i = 0; i < gi_Handler_onresize_Code.length; i++)
		eval(gi_Handler_onresize_Code[i]);
}

function	gi_Handler_onunload()
{
	var	i;
	
	for	(i = 0; i < gi_Handler_onunload_Code.length; i++)
		eval(gi_Handler_onunload_Code[i]);
}

window.onbeforeunload = gi_Handler_onbeforeunload;
window.onload = gi_Handler_onload;
window.onresize = gi_Handler_onresize;
window.onunload = gi_Handler_onunload;

//------------------------- Common Code -------------------------

var	gi_ClipString = "";

//	Get an Element's absolute position
function	gi_Common_GetPos(oElement)
{
	var	xPos = yPos = 0;
	if	(oElement.offsetParent)
		do
		{
			xPos += oElement.offsetLeft;
			yPos += oElement.offsetTop;
		}
		while	(oElement = oElement.offsetParent);

	return [xPos, yPos];
}

//	Return the Object targeted by an Event Object, hiding platform differences
function	gi_Common_GetElement(oEvent)
{
	oEvent = (oEvent) ? oEvent : ((window.event) ? window.event : null);
	return (oEvent.target) ? oEvent.target : oEvent.srcElement;
}

//	Get an Element's class, hiding platform differences
function	gi_Common_GetClass(oElement)
{
	if	(oElement.className)
		return oElement.className;
	else
		return oElement.getAttribute("class");
}

//	Set an Element's class
function	gi_Common_SetClass(oElement, sClass)
{
	oElement.className = sClass;
}

//	Return Session String
function	gi_Common_Session_String()
{
	var oElement = document.getElementById("gi_session_anchor");

	if	(oElement)
		return oElement.href.substring(oElement.href.indexOf("?") + 1);
	else
		return "";
}

//	Goto a specific hRef
function	gi_Common_Go_To_HRef(href)
{
	window.location.href = href;
}

//------------------------- Clipboard Code -------------------------

//	Prepare to copy a string to the Clipboard
function	gi_Clipboard_Copy(s)
{
	// store clip string in a global variable for later use
	if	(navigator.appName.indexOf("Microsoft") != -1)
        window.clipboardData.setData("Text", s);
	else
		gi_ClipString = s;
}

//	Return saved Clipboard string
function	gi_Clipboard_String()
{
	return gi_ClipString;
}

//------------------------- SHA1 Code -------------------------

//	Generate the SHA1 hash value for a string
function gi_SHA1 (msg) {

	function rotate_left(n,s) {
		var t4 = ( n<<s ) | (n>>>(32-s));
		return t4;
	};

	function lsb_hex(val) {
		var str="";
		var i;
		var vh;
		var vl;

		for( i=0; i<=6; i+=2 ) {
			vh = (val>>>(i*4+4))&0x0f;
			vl = (val>>>(i*4))&0x0f;
			str += vh.toString(16) + vl.toString(16);
		}
		return str;
	};

	function cvt_hex(val) {
		var str="";
		var i;
		var v;

		for( i=7; i>=0; i-- ) {
			v = (val>>>(i*4))&0x0f;
			str += v.toString(16);
		}
		return str;
	};


	function Utf8Encode(string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";

		for (var n = 0; n < string.length; n++) {

			var c = string.charCodeAt(n);

			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}

		}

		return utftext;
	};

	var blockstart;
	var i, j;
	var W = new Array(80);
	var H0 = 0x67452301;
	var H1 = 0xEFCDAB89;
	var H2 = 0x98BADCFE;
	var H3 = 0x10325476;
	var H4 = 0xC3D2E1F0;
	var A, B, C, D, E;
	var temp;

	msg = Utf8Encode(msg);

	var msg_len = msg.length;

	var word_array = new Array();
	for( i=0; i<msg_len-3; i+=4 ) {
		j = msg.charCodeAt(i)<<24 | msg.charCodeAt(i+1)<<16 |
		msg.charCodeAt(i+2)<<8 | msg.charCodeAt(i+3);
		word_array.push( j );
	}

	switch( msg_len % 4 ) {
		case 0:
			i = 0x080000000;
		break;
		case 1:
			i = msg.charCodeAt(msg_len-1)<<24 | 0x0800000;
		break;

		case 2:
			i = msg.charCodeAt(msg_len-2)<<24 | msg.charCodeAt(msg_len-1)<<16 | 0x08000;
		break;

		case 3:
			i = msg.charCodeAt(msg_len-3)<<24 | msg.charCodeAt(msg_len-2)<<16 | msg.charCodeAt(msg_len-1)<<8	| 0x80;
		break;
	}

	word_array.push( i );

	while( (word_array.length % 16) != 14 ) word_array.push( 0 );

	word_array.push( msg_len>>>29 );
	word_array.push( (msg_len<<3)&0x0ffffffff );


	for ( blockstart=0; blockstart<word_array.length; blockstart+=16 ) {

		for( i=0; i<16; i++ ) W[i] = word_array[blockstart+i];
		for( i=16; i<=79; i++ ) W[i] = rotate_left(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);

		A = H0;
		B = H1;
		C = H2;
		D = H3;
		E = H4;

		for( i= 0; i<=19; i++ ) {
			temp = (rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B,30);
			B = A;
			A = temp;
		}

		for( i=20; i<=39; i++ ) {
			temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B,30);
			B = A;
			A = temp;
		}

		for( i=40; i<=59; i++ ) {
			temp = (rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B,30);
			B = A;
			A = temp;
		}

		for( i=60; i<=79; i++ ) {
			temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B,30);
			B = A;
			A = temp;
		}

		H0 = (H0 + A) & 0x0ffffffff;
		H1 = (H1 + B) & 0x0ffffffff;
		H2 = (H2 + C) & 0x0ffffffff;
		H3 = (H3 + D) & 0x0ffffffff;
		H4 = (H4 + E) & 0x0ffffffff;

	}

	var temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4);

	return temp.toLowerCase();

}

//	Replace the value of a text field by it's SHA1 digest
function gi_SHA1_Replace(id)
{
	var oElement = document.getElementById(id);
	
	if	(oElement.value)
	{
		if	(oElement.value.length != 0)
			oElement.value = gi_SHA1(oElement.value);
	}
}

//------------------------- ViewDoc Code -------------------------

//	Load a Document into a new browser window
function gi_ViewDoc_From_Id(path, id)
{
	var oElement = document.getElementById(id);
	var	sDocName;
	
	if	(!oElement.options)
	{
		// element is an ordinary text field
		if	(!oElement.value)
			sDocName = oElement.innerText;
		else
			sDocName = oElement.value;
	}
	else
		// element is a ListBox
		sDocName = oElement.options[oElement.selectedIndex].text;
		
	if	(sDocName == "<not set>")
		window.alert("Document Name is required!");
	else
	{
		sDocName = sDocName.replace(/ /g, "_");
	
		window.open(path + sDocName);
	}
}