/**
 * General Javascript functions
 *
 * For various elements of the layout, however these are mostly being deprecated
 * by jQuery extensions ({@link jquery-pm-layout.js})
 *
 * @package pmweb
 * @subpackage script
 * @since 07/03/2007
 * @copyright Profitmaster Systems Ltd., www.profitmaster.co.uk
 * @author Pete Hurst, <peterh@profitmaster.co.uk>
 * @version $Id: general.js 3358 2009-12-07 16:51:52Z phil $ v1.4.0.1
 */

var layout = {

	fillHeight: function(id,margin) {
		totalHeight = this.getWindowHeight();
		if (totalHeight) {
			targetHeight = totalHeight-margin;
			element = document.getElementById(id);
			if (element) {
				element.style.height = targetHeight+"px";
			}
		}
	},

	matchHeight: function(idTarget,idSource,offset) {
		sourceElement = document.getElementById(idSource);
		targetElement = document.getElementById(idTarget);
		if (sourceElement&&targetElement) {
			sourceHeight = sourceElement.clientHeight;
			targetElement.style.height = (sourceHeight-offset)+"px";
		}
	},

	maxHeight: function(idTarget,idSource,offset) {
		sourceElement = document.getElementById(idSource);
		targetElement = document.getElementById(idTarget);
		if (sourceElement&&targetElement) {
			targetHeight = targetElement.clientHeight;
			sourceHeight = sourceElement.clientHeight;
			targetElement.style.height = (Math.max(sourceHeight,targetHeight)-offset)+"px";
		}
	},

	getWindowHeight: function() {
		if (window.innerHeight) // All except IE
			return window.innerHeight;
		if (document.documentElement && document.documentElement.clientHeight)
			return document.documentElement.clientHeight; // IE6 +4.01
		if (document.body && document.body.clientHeight)
			return document.body.clientHeight; // IE5 or DTD 3.2
		return 0;
	},

	getScrollPosition: function() {
		if (document.documentElement && document.documentElement.scrollTop)
			return document.documentElement.scrollTop; // IE6 +4.01
		if (document.body && document.body.scrollTop)
			return document.body.scrollTop; // IE5 or DTD 3.2
		return 0;
	},

	setScrollPosition: function(yPosition) {
		scrollTo(0, yPosition);
	}

};

var ui = {

	submit: function(form,buttonName) {
		// Create hidden field to simulate button click
		var input = document.createElement("input");
		input.setAttribute("type", "hidden");
		input.setAttribute("name", buttonName);
		input.setAttribute("value", buttonName);
		// Add to form collection
		form.appendChild(input);
		// Submit form
		if (form.onsubmit) {
			if (form.onsubmit())
				form.submit();
		}
		else {
			form.submit();
		}
		// Prevent link from activating
		return false;
	},

	// Save scroll height to a hidden input so that postback page can appear at same position
	scrollSavePost: function(form,hiddenInput) {
		if (!(hiddenInput==undefined)) {
			hiddenInput.value = layout.getScrollPosition();
		}
	},

	// Save scroll height to end of form URL so that postback page can appear at same position
	scrollSaveGet: function(form,queryToken) {
		if (form.action.match(/\?/)) {
			form.action+="&"+queryToken+"="+layout.getScrollPosition().toString();
		}
		else {
			form.action+="?"+queryToken+"="+layout.getScrollPosition().toString();
		}
	},

	openWindow: function(url,width,height) {
		day = new Date();
		id = day.getTime();
		windowLeft = (screen.width - width) / 2;
		windowTop = (screen.height - height) / 2;
		eval("page"+id+"=window.open(url,'"+id+"','toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width="+width+",height="+height+",left = "+windowLeft+",top = "+windowTop+"');");
	//	window.open(url, id,'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width='+width+',height='+height+',left = '+left+',top = '+top);
		return false; // Prevent hyperlink from firing when JS is active
	}

};

/**
 *
 */
var keys = {
    getCharCode: function(evt){
            return (evt.charCode) ? evt.charCode :
                ((evt.which) ? evt.which : evt.keyCode);
    },
    isEnter:function(charCode){
            return (charCode == 13);
    },
    submitViaEnter:function(evt,form,buttonName) {
            evt = (evt) ? evt : event;
            charCode = this.getCharCode(evt);
            if (this.isEnter(charCode)) {
                    ui.submit(form,buttonName);
                    return false;
            }
            return true;
    }
};

var pmSecurity = {
	encryptPassword: function(form, pwdName, nonce, salt) {
		pwdField = form.elements[pwdName];
		
		if (!pwdField) {
			alert("Missing login field!");
			return false;
		}
		
		password = pwdField.value;

		// set value of password field to hash of (nonce and (salted hash of entered password))
		pwdField.value = this.hex_md5(nonce + this.hex_md5(salt + password));

		return true;
	},

	/*
	 * MD5 implementation below modified by Phil Smith (www.profitmaster.co.uk)
	 * solely to make it part of this object instead of global
	 */

	/*
	 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
	 * Digest Algorithm, as defined in RFC 1321.
	 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
	 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
	 * Distributed under the BSD License
	 * See http://pajhome.org.uk/crypt/md5 for more info.
	 */

	/*
	 * Configurable variables. You may need to tweak these to be compatible with
	 * the server-side, but the defaults work in most cases.
	 */
	hexcase: 0,  /* hex output format. 0 - lowercase; 1 - uppercase        */
	b64pad: "", /* base-64 pad character. "=" for strict RFC compliance   */
	chrsz: 8,  /* bits per input character. 8 - ASCII; 16 - Unicode      */

	/*
	 * These are the functions you'll usually want to call
	 * They take string arguments and return either hex or base-64 encoded strings
	 */
	hex_md5: function(s){ return this.binl2hex(this.core_md5(this.str2binl(s), s.length * this.chrsz));},
	b64_md5: function(s){ return this.binl2b64(this.core_md5(this.str2binl(s), s.length * this.chrsz));},
	str_md5: function(s){ return this.binl2str(this.core_md5(this.str2binl(s), s.length * this.chrsz));},
	hex_hmac_md5: function(key, data) { return this.binl2hex(this.core_hmac_md5(key, data)); },
	b64_hmac_md5: function(key, data) { return this.binl2b64(this.core_hmac_md5(key, data)); },
	str_hmac_md5: function(key, data) { return this.binl2str(this.core_hmac_md5(key, data)); },

	/*
	 * Perform a simple self-test to see if the VM is working
	 */
	md5_vm_test: function()
	{
	  return this.hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
	},

	/*
	 * Calculate the MD5 of an array of little-endian words, and a bit length
	 */
	core_md5: function(x, len)
	{
	  /* append padding */
	  x[len >> 5] |= 0x80 << ((len) % 32);
	  x[(((len + 64) >>> 9) << 4) + 14] = len;

	  var a =  1732584193;
	  var b = -271733879;
	  var c = -1732584194;
	  var d =  271733878;

	  for(var i = 0; i < x.length; i += 16)
	  {
	    var olda = a;
	    var oldb = b;
	    var oldc = c;
	    var oldd = d;

	    a = this.md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
	    d = this.md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
	    c = this.md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
	    b = this.md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
	    a = this.md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
	    d = this.md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
	    c = this.md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
	    b = this.md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
	    a = this.md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
	    d = this.md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
	    c = this.md5_ff(c, d, a, b, x[i+10], 17, -42063);
	    b = this.md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
	    a = this.md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
	    d = this.md5_ff(d, a, b, c, x[i+13], 12, -40341101);
	    c = this.md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
	    b = this.md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

	    a = this.md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
	    d = this.md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
	    c = this.md5_gg(c, d, a, b, x[i+11], 14,  643717713);
	    b = this.md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
	    a = this.md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
	    d = this.md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
	    c = this.md5_gg(c, d, a, b, x[i+15], 14, -660478335);
	    b = this.md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
	    a = this.md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
	    d = this.md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
	    c = this.md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
	    b = this.md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
	    a = this.md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
	    d = this.md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
	    c = this.md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
	    b = this.md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

	    a = this.md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
	    d = this.md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
	    c = this.md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
	    b = this.md5_hh(b, c, d, a, x[i+14], 23, -35309556);
	    a = this.md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
	    d = this.md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
	    c = this.md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
	    b = this.md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
	    a = this.md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
	    d = this.md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
	    c = this.md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
	    b = this.md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
	    a = this.md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
	    d = this.md5_hh(d, a, b, c, x[i+12], 11, -421815835);
	    c = this.md5_hh(c, d, a, b, x[i+15], 16,  530742520);
	    b = this.md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

	    a = this.md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
	    d = this.md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
	    c = this.md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
	    b = this.md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
	    a = this.md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
	    d = this.md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
	    c = this.md5_ii(c, d, a, b, x[i+10], 15, -1051523);
	    b = this.md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
	    a = this.md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
	    d = this.md5_ii(d, a, b, c, x[i+15], 10, -30611744);
	    c = this.md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
	    b = this.md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
	    a = this.md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
	    d = this.md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
	    c = this.md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
	    b = this.md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

	    a = this.safe_add(a, olda);
	    b = this.safe_add(b, oldb);
	    c = this.safe_add(c, oldc);
	    d = this.safe_add(d, oldd);
	  }
	  return Array(a, b, c, d);

	},

	/*
	 * These functions implement the four basic operations the algorithm uses.
	 */
	md5_cmn: function(q, a, b, x, s, t)
	{
	  return this.safe_add(this.bit_rol(this.safe_add(this.safe_add(a, q), this.safe_add(x, t)), s),b);
	},
	md5_ff: function(a, b, c, d, x, s, t)
	{
	  return this.md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
	},
	md5_gg: function(a, b, c, d, x, s, t)
	{
	  return this.md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
	},
	md5_hh: function(a, b, c, d, x, s, t)
	{
	  return this.md5_cmn(b ^ c ^ d, a, b, x, s, t);
	},
	md5_ii: function(a, b, c, d, x, s, t)
	{
	  return this.md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
	},

	/*
	 * Calculate the HMAC-MD5, of a key and some data
	 */
	core_hmac_md5: function(key, data)
	{
	  var bkey = this.str2binl(key);
	  if(bkey.length > 16) bkey = this.core_md5(bkey, key.length * this.chrsz);

	  var ipad = Array(16), opad = Array(16);
	  for(var i = 0; i < 16; i++)
	  {
	    ipad[i] = bkey[i] ^ 0x36363636;
	    opad[i] = bkey[i] ^ 0x5C5C5C5C;
	  }

	  var hash = this.core_md5(ipad.concat(this.str2binl(data)), 512 + data.length * this.chrsz);
	  return this.core_md5(opad.concat(hash), 512 + 128);
	},

	/*
	 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
	 * to work around bugs in some JS interpreters.
	 */
	safe_add: function(x, y)
	{
	  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
	  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
	  return (msw << 16) | (lsw & 0xFFFF);
	},

	/*
	 * Bitwise rotate a 32-bit number to the left.
	 */
	bit_rol: function(num, cnt)
	{
	  return (num << cnt) | (num >>> (32 - cnt));
	},

	/*
	 * Convert a string to an array of little-endian words
	 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
	 */
	str2binl: function(str)
	{
	  var bin = Array();
	  var mask = (1 << this.chrsz) - 1;
	  for(var i = 0; i < str.length * this.chrsz; i += this.chrsz)
	    bin[i>>5] |= (str.charCodeAt(i / this.chrsz) & mask) << (i%32);
	  return bin;
	},

	/*
	 * Convert an array of little-endian words to a string
	 */
	binl2str: function(bin)
	{
	  var str = "";
	  var mask = (1 << this.chrsz) - 1;
	  for(var i = 0; i < bin.length * 32; i += this.chrsz)
	    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
	  return str;
	},

	/*
	 * Convert an array of little-endian words to a hex string.
	 */
	binl2hex: function(binarray)
	{
	  var hex_tab = this.hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
	  var str = "";
	  for(var i = 0; i < binarray.length * 4; i++)
	  {
	    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
	           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
	  }
	  return str;
	},

	/*
	 * Convert an array of little-endian words to a base-64 string
	 */
	binl2b64: function(binarray)
	{
	  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
	  var str = "";
	  for(var i = 0; i < binarray.length * 4; i += 3)
	  {
	    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
	                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
	                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
	    for(var j = 0; j < 4; j++)
	    {
	      if(i * 8 + j * 6 > binarray.length * 32) str += this.b64pad;
	      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
	    }
	  }
	  return str;
	}

};