common.js
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common.js
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	/*
	+-----------------------------------------------------------------------+
	\| RoundCube common js library \|
	\| \|
	\| This file is part of the RoundCube web development suite \|
	\| Copyright (C) 2005, RoundCube Dev, - Switzerland \|
	\| Licensed under the GNU GPL \|
	\| \|
	+-----------------------------------------------------------------------+
	\| Author: Thomas Bruederli <roundcube@gmail.com> \|
	+-----------------------------------------------------------------------+

	$Id$
	*/


	// default browsercheck
	function roundcube_browser()
	{
	this.ver = parseFloat(navigator.appVersion);
	this.appver = navigator.appVersion;
	this.agent = navigator.userAgent;
	this.name = navigator.appName;
	this.vendor = navigator.vendor ? navigator.vendor : '';
	this.vendver = navigator.vendorSub ? parseFloat(navigator.vendorSub) : 0;
	this.product = navigator.product ? navigator.product : '';
	this.platform = String(navigator.platform).toLowerCase();
	this.lang = (navigator.language) ? navigator.language.substring(0,2) :
	(navigator.browserLanguage) ? navigator.browserLanguage.substring(0,2) :
	(navigator.systemLanguage) ? navigator.systemLanguage.substring(0,2) : 'en';

	this.win = (this.platform.indexOf('win')>=0) ? true : false;
	this.mac = (this.platform.indexOf('mac')>=0) ? true : false;
	this.linux = (this.platform.indexOf('linux')>=0) ? true : false;
	this.unix = (this.platform.indexOf('unix')>=0) ? true : false;

	this.dom = document.getElementById ? true : false;
	this.dom2 = (document.addEventListener && document.removeEventListener);

	this.ie = (document.all) ? true : false;
	this.ie4 = (this.ie && !this.dom);
	this.ie5 = (this.dom && this.appver.indexOf('MSIE 5')>0);
	this.ie6 = (this.dom && this.appver.indexOf('MSIE 6')>0);

	this.mz = (this.dom && this.ver>=5); // (this.dom && this.product=='Gecko')
	this.ns = ((this.ver<5 && this.name=='Netscape') \|\| (this.ver>=5 && this.vendor.indexOf('Netscape')>=0));
	this.ns4 = (this.ns && parseInt(this.ver)==4);
	this.ns6 = (this.ns && parseInt(this.vendver)==6); // (this.mz && this.ns) ? true : false;
	this.ns7 = (this.ns && parseInt(this.vendver)==7); // this.agent.indexOf('Netscape/7')>0);
	this.safari = (this.agent.toLowerCase().indexOf('safari')>0 \|\| this.agent.toLowerCase().indexOf('applewebkit')>0);
	this.konq = (this.agent.toLowerCase().indexOf('konqueror')>0);

	this.opera = (window.opera) ? true : false;
	this.opera5 = (this.opera5 && this.agent.indexOf('Opera 5')>0) ? true : false;
	this.opera6 = (this.opera && this.agent.indexOf('Opera 6')>0) ? true : false;
	this.opera7 = (this.opera && this.agent.indexOf('Opera 7')>0) ? true : false;

	if(this.opera && window.RegExp)
	this.vendver = (/opera(\s\|\/)([0-9\.]+)/i.test(navigator.userAgent)) ? parseFloat(RegExp.$2) : -1;
	else if(!this.vendver && this.safari)
	this.vendver = (/(safari\|applewebkit)\/([0-9]+)/i.test(this.agent)) ? parseInt(RegExp.$2) : 0;
	else if((!this.vendver && this.mz) \|\| this.agent.indexOf('Camino')>0)
	this.vendver = (/rv:([0-9\.]+)/.test(this.agent)) ? parseFloat(RegExp.$1) : 0;
	else if(this.ie && window.RegExp)
	this.vendver = (/msie\s+([0-9\.]+)/i.test(this.agent)) ? parseFloat(RegExp.$1) : 0;
	else if(this.konq && window.RegExp)
	this.vendver = (/khtml\/([0-9\.]+)/i.test(this.agent)) ? parseFloat(RegExp.$1) : 0;


	// get real language out of safari's user agent
	if(this.safari && (/;\s+([a-z]{2})-[a-z]{2}\)/i.test(this.agent)))
	this.lang = RegExp.$1;

	this.dhtml = ((this.ie4 && this.win) \|\| this.ie5 \|\| this.ie6 \|\| this.ns4 \|\| this.mz);
	this.layers = this.ns4; // (document.layers);
	this.div = (this.ie4 \|\| this.dom);
	this.vml = (this.win && this.ie && this.dom && !this.opera);
	this.linkborder = (this.ie \|\| this.mz);
	this.rollover = (this.ver>=4 \|\| (this.ns && this.ver>=3)); // (document.images) ? true : false;
	this.pngalpha = (this.mz \|\| (this.opera && this.vendver>=6) \|\| (this.ie && this.mac && this.vendver>=5) \|\|
	(this.ie && this.win && this.vendver>=5.5) \|\| this.safari);
	this.opacity = (this.mz \|\| (this.ie && this.vendver>=5.5 && !this.opera) \|\| (this.safari && this.vendver>=100));
	this.cookies = navigator.cookieEnabled;

	// test for XMLHTTP support
	this.xmlhttp_test = function()
	{
	var activeX_test = new Function("try{var o=new ActiveXObject('Microsoft.XMLHTTP');return true;}catch(err){return false;}");
	this.xmlhttp = (window.XMLHttpRequest \|\| (window.ActiveXObject && activeX_test())) ? true : false;
	return this.xmlhttp;
	}
	}




	var rcube_layer_objects = new Array();

	function rcube_layer(id, attributes)
	{
	this.name = id;

	// create a new layer in the current document
	this.create = function(arg)
	{
	var l = (arg.x) ? arg.x : 0;
	var t = (arg.y) ? arg.y : 0;
	var w = arg.width;
	var h = arg.height;
	var z = arg.zindex;
	var vis = arg.vis;
	var parent = arg.parent;
	var obj;

	obj = document.createElement('DIV');
	with(obj)
	{
	id = this.name;
	with(style)
	{
	position = 'absolute';
	visibility = (vis) ? (vis==2) ? 'inherit' : 'visible' : 'hidden';
	left = l+'px';
	top = t+'px';
	if(w) width = w+'px';
	if(h) height = h+'px';
	if(z) zIndex = z;
	}
	}

	if(parent) parent.appendChild(obj);
	else document.body.appendChild(obj);

	this.elm = obj;
	};


	// create new layer
	if(attributes!=null)
	{
	this.create(attributes);
	this.name = this.elm.id;
	}
	else // just refer to the object
	this.elm = document.getElementById(id);


	if(!this.elm)
	return false;


	// ******* layer object properties *******

	this.css = this.elm.style;
	this.event = this.elm;
	this.width = this.elm.offsetWidth;
	this.height = this.elm.offsetHeight;
	this.x = parseInt(this.elm.offsetLeft);
	this.y = parseInt(this.elm.offsetTop);
	this.visible = (this.css.visibility=='visible' \|\| this.css.visibility=='show' \|\| this.css.visibility=='inherit') ? true : false;

	this.id = rcube_layer_objects.length;
	this.obj = 'rcube_layer_objects['+this.id+']';
	rcube_layer_objects[this.id] = this;


	// ******* layer object methods *******


	// move the layer to a specific position
	this.move = function(x, y)
	{
	this.x = x;
	this.y = y;
	this.css.left = Math.round(this.x)+'px';
	this.css.top = Math.round(this.y)+'px';
	}


	// move the layer for a specific step
	this.shift = function(x,y)
	{
	x = Math.round(x*100)/100;
	y = Math.round(y*100)/100;
	this.move(this.x+x, this.y+y);
	}


	// change the layers width and height
	this.resize = function(w,h)
	{
	this.css.width = w+'px';
	this.css.height = h+'px';
	this.width = w;
	this.height = h;
	}


	// cut the layer (top,width,height,left)
	this.clip = function(t,w,h,l)
	{
	this.css.clip='rect('+t+' '+w+' '+h+' '+l+')';
	this.clip_height = h;
	this.clip_width = w;
	}


	// show or hide the layer
	this.show = function(a)
	{
	if(a==1)
	{
	this.css.visibility = 'visible';
	this.visible = true;
	}
	else if(a==2)
	{
	this.css.visibility = 'inherit';
	this.visible = true;
	}
	else
	{
	this.css.visibility = 'hidden';
	this.visible = false;
	}
	}


	// write new content into a Layer
	this.write = function(cont)
	{
	this.elm.innerHTML = cont;
	}


	// set the given color to the layer background
	this.set_bgcolor = function(c)
	{
	if(!c \|\| c=='#')
	c = 'transparent';

	this.css.backgroundColor = c;
	}


	// set the opacity of a layer to the given ammount (in %)
	this.set_opacity = function(v)
	{
	if(!bw.opacity)
	return;

	var op = v<=1 ? Math.round(v*100) : parseInt(v);

	if(bw.ie)
	this.css.filter = 'alpha(opacity:'+op+')';
	else if(bw.safari)
	{
	this.css.opacity = op/100;
	this.css.KhtmlOpacity = op/100;
	}
	else if(bw.mz)
	this.css.MozOpacity = op/100;
	}
	}


	// check if input is a valid email address
	function rcube_check_email(input, inline)
	{
	if (input && window.RegExp)
	{
	var reg_str = '([a-z0-9][-a-z0-9\.\+_])\@(([-a-z0-9][\.]?)[a-z0-9]\.[a-z]{2,9})';
	var reg1 = inline ? new RegExp(reg_str, 'i') : new RegExp('^'+reg_str+'$', 'i');
	var reg2 = /[\._\-]{2}/;
	return reg1.test(input) && !reg2.test(input) ? true : false;
	}
	return false;
	}


	// find a value in a specific array and returns the index
	function find_in_array()
	{
	var args = find_in_array.arguments;
	if(!args.length) return -1;

	var haystack = typeof(args[0])=='object' ? args[0] : args.length>1 && typeof(args[1])=='object' ? args[1] : new Array();
	var needle = typeof(args[0])!='object' ? args[0] : args.length>1 && typeof(args[1])!='object' ? args[1] : '';
	var nocase = args.length==3 ? args[2] : false;

	if(!haystack.length) return -1;

	for(var i=0; i<haystack.length; i++)
	if(nocase && haystack[i].toLowerCase()==needle.toLowerCase())
	return i;
	else if(haystack[i]==needle)
	return i;

	return -1;
	}


	// get any type of html objects by id/name
	function rcube_find_object(id, d)
	{
	var n, f, obj, e;
	if(!d) d = document;

	if(d.getElementsByName && (e = d.getElementsByName(id)))
	obj = e[0];
	if(!obj && d.getElementById)
	obj = d.getElementById(id);
	if(!obj && d.all)
	obj = d.all[id];

	if(!obj && d.images.length)
	obj = d.images[id];

	if(!obj && d.forms.length)
	for(f=0; f<d.forms.length; f++)
	{
	if(d.forms[f].name == id)
	obj = d.forms[f];
	else if(d.forms[f].elements[id])
	obj = d.forms[f].elements[id];
	}

	if(!obj && d.layers)
	{
	if(d.layers[id]) obj = d.layers[id];
	for(n=0; !obj && n<d.layers.length; n++)
	obj = nex_get_object(id, d.layers[n].document);
	}

	return obj;
	}


	// return the absolute position of an object within the document
	function rcube_get_object_pos(obj)
	{
	if(typeof(obj)=='string')
	obj = nex_get_object(obj);

	if(!obj) return {x:0, y:0};

	var iX = (bw.layers) ? obj.x : obj.offsetLeft;
	var iY = (bw.layers) ? obj.y : obj.offsetTop;

	if(bw.ie \|\| bw.mz)
	{
	var elm = obj.offsetParent;
	while(elm && elm!=null)
	{
	iX += elm.offsetLeft;
	iY += elm.offsetTop;
	elm = elm.offsetParent;
	}
	}

	if(bw.mac && bw.ie5) iX += document.body.leftMargin;
	if(bw.mac && bw.ie5) iY += document.body.topMargin;

	return {x:iX, y:iY};
	}


	// cookie functions by GoogieSpell
	function setCookie(name, value, expires, path, domain, secure)
	{
	var curCookie = name + "=" + escape(value) +
	(expires ? "; expires=" + expires.toGMTString() : "") +
	(path ? "; path=" + path : "") +
	(domain ? "; domain=" + domain : "") +
	(secure ? "; secure" : "");
	document.cookie = curCookie;
	}

	function getCookie(name)
	{
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1)
	{
	begin = dc.indexOf(prefix);
	if (begin != 0) return null;
	}
	else
	begin += 2;
	var end = document.cookie.indexOf(";", begin);
	if (end == -1)
	end = dc.length;
	return unescape(dc.substring(begin + prefix.length, end));
	}


	var bw = new roundcube_browser();

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