API: uploader swfobject.js (YUI Library)

# Yahoo! UI Library

### Uploader 2.8.1

Yahoo! UI Library > uploader > swfobject.js (source view)
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    /*extern ActiveXObject, __flash_unloadHandler, __flash_savedUnloadHandler */
    /*!
     * SWFObject v1.5: Flash Player detection and embed - http://blog.deconcept.com/swfobject/
     *
     * SWFObject is (c) 2007 Geoff Stearns and is released under the MIT License:
     * http://www.opensource.org/licenses/mit-license.php
     * @namespace YAHOO
     */

    YAHOO.namespace("deconcept");

    YAHOO.deconcept = YAHOO.deconcept || {};

    if(typeof YAHOO.deconcept.util == "undefined" || !YAHOO.deconcept.util)
    {
    	YAHOO.deconcept.util = {};
    }

    if(typeof YAHOO.deconcept.SWFObjectUtil == "undefined" || !YAHOO.deconcept.SWFObjectUtil)
    {
    	YAHOO.deconcept.SWFObjectUtil = {};
    }

    YAHOO.deconcept.SWFObject = function(swf, id, w, h, ver, c, quality, xiRedirectUrl, redirectUrl, detectKey)
    {
    	if(!document.getElementById) { return; }
    	this.DETECT_KEY = detectKey ? detectKey : 'detectflash';
    	this.skipDetect = YAHOO.deconcept.util.getRequestParameter(this.DETECT_KEY);
    	this.params = {};
    	this.variables = {};
    	this.attributes = [];
    	if(swf) { this.setAttribute('swf', swf); }
    	if(id) { this.setAttribute('id', id); }
    	if(w) { this.setAttribute('width', w); }
    	if(h) { this.setAttribute('height', h); }
    	if(ver) { this.setAttribute('version', new YAHOO.deconcept.PlayerVersion(ver.toString().split("."))); }
    	this.installedVer = YAHOO.deconcept.SWFObjectUtil.getPlayerVersion();
    	if (!window.opera && document.all && this.installedVer.major > 7)
    	{
    		// only add the onunload cleanup if the Flash Player version supports External Interface and we are in IE
    		YAHOO.deconcept.SWFObject.doPrepUnload = true;
    	}
    	if(c)
    	{
    		this.addParam('bgcolor', c);
    	}
    	var q = quality ? quality : 'high';
    	this.addParam('quality', q);
    	this.setAttribute('useExpressInstall', false);
    	this.setAttribute('doExpressInstall', false);
    	var xir = (xiRedirectUrl) ? xiRedirectUrl : window.location;
    	this.setAttribute('xiRedirectUrl', xir);
    	this.setAttribute('redirectUrl', '');
    	if(redirectUrl)
    	{
    		this.setAttribute('redirectUrl', redirectUrl);
    	}
    };

    YAHOO.deconcept.SWFObject.prototype =
    {
    	useExpressInstall: function(path)
    	{
    		this.xiSWFPath = !path ? "expressinstall.swf" : path;
    		this.setAttribute('useExpressInstall', true);
    	},
    	setAttribute: function(name, value){
    		this.attributes[name] = value;
    	},
    	getAttribute: function(name){
    		return this.attributes[name];
    	},
    	addParam: function(name, value){
    		this.params[name] = value;
    	},
    	getParams: function(){
    		return this.params;
    	},
    	addVariable: function(name, value){
    		this.variables[name] = value;
    	},
    	getVariable: function(name){
    		return this.variables[name];
    	},
    	getVariables: function(){
    		return this.variables;
    	},
    	getVariablePairs: function(){
    		var variablePairs = [];
    		var key;
    		var variables = this.getVariables();
    		for(key in variables)
    		{
    			if(variables.hasOwnProperty(key))
    			{
    				variablePairs[variablePairs.length] = key +"="+ variables[key];
    			}
    		}
    		return variablePairs;
    	},
    	getSWFHTML: function() {
    		var swfNode = "";
    		var params = {};
    		var key = "";
    		var pairs = "";
    		if (navigator.plugins && navigator.mimeTypes && navigator.mimeTypes.length) { // netscape plugin architecture
    			if (this.getAttribute("doExpressInstall")) {
    				this.addVariable("MMplayerType", "PlugIn");
    				this.setAttribute('swf', this.xiSWFPath);
    			}
    			swfNode = '<embed type="application/x-shockwave-flash" src="'+ this.getAttribute('swf') +'" width="'+ this.getAttribute('width') +'" height="'+ this.getAttribute('height') +'" style="'+ this.getAttribute('style') +'"';
    			swfNode += ' id="'+ this.getAttribute('id') +'" name="'+ this.getAttribute('id') +'" ';
    			params = this.getParams();
    			for(key in params)
    			{
    				if(params.hasOwnProperty(key))
    				{
    					swfNode += [key] +'="'+ params[key] +'" ';
    				}
    			}
    			pairs = this.getVariablePairs().join("&");
    			if (pairs.length > 0){ swfNode += 'flashvars="'+ pairs +'"'; }
    			swfNode += '/>';
    		} else { // PC IE
    			if (this.getAttribute("doExpressInstall")) {
    				this.addVariable("MMplayerType", "ActiveX");
    				this.setAttribute('swf', this.xiSWFPath);
    			}
    			swfNode = '<object id="'+ this.getAttribute('id') +'" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="'+ this.getAttribute('width') +'" height="'+ this.getAttribute('height') +'" style="'+ this.getAttribute('style') +'">';
    			swfNode += '<param name="movie" value="'+ this.getAttribute('swf') +'" />';
    			params = this.getParams();
    			for(key in params)
    			{
    				if(params.hasOwnProperty(key))
    				{
    					swfNode += '<param name="'+ key +'" value="'+ params[key] +'" />';
    				}
    			}
    			pairs = this.getVariablePairs().join("&");
    			if(pairs.length > 0) {swfNode += '<param name="flashvars" value="'+ pairs +'" />';}
    			swfNode += "</object>";
    		}
    		return swfNode;
    	},
    	write: function(elementId)
    	{
    		if(this.getAttribute('useExpressInstall')) {
    			// check to see if we need to do an express install
    			var expressInstallReqVer = new YAHOO.deconcept.PlayerVersion([6,0,65]);
    			if (this.installedVer.versionIsValid(expressInstallReqVer) && !this.installedVer.versionIsValid(this.getAttribute('version'))) {
    				this.setAttribute('doExpressInstall', true);
    				this.addVariable("MMredirectURL", escape(this.getAttribute('xiRedirectUrl')));
    				document.title = document.title.slice(0, 47) + " - Flash Player Installation";
    				this.addVariable("MMdoctitle", document.title);
    			}
    		}
    		if(this.skipDetect || this.getAttribute('doExpressInstall') || this.installedVer.versionIsValid(this.getAttribute('version')))
    		{
    			var n = (typeof elementId == 'string') ? document.getElementById(elementId) : elementId;
    			n.innerHTML = this.getSWFHTML();
    			return true;
    		}
    		else
    		{
    			if(this.getAttribute('redirectUrl') !== "")
    			{
    				document.location.replace(this.getAttribute('redirectUrl'));
    			}
    		}
    		return false;
    	}
    };

    /* ---- detection functions ---- */
    YAHOO.deconcept.SWFObjectUtil.getPlayerVersion = function()
    {
    	var axo = null;
    	var PlayerVersion = new YAHOO.deconcept.PlayerVersion([0,0,0]);
    	if(navigator.plugins && navigator.mimeTypes.length)
    	{
    		var x = navigator.plugins["Shockwave Flash"];
    		if(x && x.description)
    		{
    			PlayerVersion = new YAHOO.deconcept.PlayerVersion(x.description.replace(/([a-zA-Z]|\s)+/, "").replace(/(\s+r|\s+b[0-9]+)/, ".").split("."));
    		}
    	}
    	else if (navigator.userAgent && navigator.userAgent.indexOf("Windows CE") >= 0)
    	{ // if Windows CE
    		var counter = 3;
    		while(axo)
    		{
    			try
    			{
    				counter++;
    				axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash."+ counter);
    //				document.write("player v: "+ counter);
    				PlayerVersion = new YAHOO.deconcept.PlayerVersion([counter,0,0]);
    			}
    			catch(e)
    			{
    				axo = null;
    			}
    		}
    	}
    	else
    	{ // Win IE (non mobile)
    		// do minor version lookup in IE, but avoid fp6 crashing issues
    		// see http://blog.deconcept.com/2006/01/11/getvariable-setvariable-crash-internet-explorer-flash-6/
    		try
    		{
    			axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");
    		}
    		catch(e)
    		{
    			try
    			{
    				axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");
    				PlayerVersion = new YAHOO.deconcept.PlayerVersion([6,0,21]);
    				axo.AllowScriptAccess = "always"; // error if player version < 6.0.47 (thanks to Michael Williams @ Adobe for this code)
    			}
    			catch(e)
    			{
    				if(PlayerVersion.major == 6)
    				{
    					return PlayerVersion;
    				}
    			}
    			try
    			{
    				axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
    			}
    			catch(e) {}
    		}

    		if(axo !== null)
    		{
    			PlayerVersion = new YAHOO.deconcept.PlayerVersion(axo.GetVariable("$version").split(" ")[1].split(","));
    		}
    	}
    	return PlayerVersion;
    };

    YAHOO.deconcept.PlayerVersion = function(arrVersion)
    {
    	this.major = arrVersion[0] !== null ? parseInt(arrVersion[0], 0) : 0;
    	this.minor = arrVersion[1] !== null ? parseInt(arrVersion[1], 0) : 0;
    	this.rev = arrVersion[2] !== null ? parseInt(arrVersion[2], 0) : 0;
    };

    YAHOO.deconcept.PlayerVersion.prototype.versionIsValid = function(fv)
    {
    	if(this.major < fv.major)
    	{
    		return false;
    	}
    	if(this.major > fv.major)
    	{
    		return true;
    	}
    	if(this.minor < fv.minor)
    	{
    		return false;
    	}
    	if(this.minor > fv.minor)
    	{
    		return true;
    	}
    	if(this.rev < fv.rev)
    	{
    		return false;
    	}
    	return true;
    };

    /* ---- get value of query string param ---- */
    YAHOO.deconcept.util =
    {
    	getRequestParameter: function(param)
    	{
    		var q = document.location.search || document.location.hash;
    		if(param === null) { return q; }
    		if(q)
    		{
    			var pairs = q.substring(1).split("&");
    			for(var i=0; i < pairs.length; i++)
    			{
    				if (pairs[i].substring(0, pairs[i].indexOf("=")) == param)
    				{
    					return pairs[i].substring((pairs[i].indexOf("=") + 1));
    				}
    			}
    		}
    		return "";
    	}
    };

    /* fix for video streaming bug */
    YAHOO.deconcept.SWFObjectUtil.cleanupSWFs = function()
    {
    	var objects = document.getElementsByTagName("OBJECT");
    	for(var i = objects.length - 1; i >= 0; i--)
    	{
    		objects[i].style.display = 'none';
    		for(var x in objects[i])
    		{
    			if(typeof objects[i][x] == 'function')
    			{
    				objects[i][x] = function(){};
    			}
    		}
    	}
    };

    // fixes bug in some fp9 versions see http://blog.deconcept.com/2006/07/28/swfobject-143-released/
    if(YAHOO.deconcept.SWFObject.doPrepUnload)
    {
    	if(!YAHOO.deconcept.unloadSet)
    	{
    		YAHOO.deconcept.SWFObjectUtil.prepUnload = function()
    		{
    			__flash_unloadHandler = function(){};
    			__flash_savedUnloadHandler = function(){};
    			window.attachEvent("onunload", YAHOO.deconcept.SWFObjectUtil.cleanupSWFs);
    		};
    		window.attachEvent("onbeforeunload", YAHOO.deconcept.SWFObjectUtil.prepUnload);
    		YAHOO.deconcept.unloadSet = true;
    	}
    }

    /* add document.getElementById if needed (mobile IE < 5) */
    if(!document.getElementById && document.all)
    {
    	document.getElementById = function(id) { return document.all[id]; };
    }

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