flash.js

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		}
	},
	
	// Initializes dojo.flash.
	_initialize: function(){
		//dojo.debug("dojo.flash._initialize");
		// see if we need to rev or install Flash on this platform
		var installer = new dojo.flash.Install();
		dojo.flash.installer = installer;

		if(installer.needed() == true){		
			installer.install();
		}else{
			//dojo.debug("Writing object out");
			// write the flash object into the page
			dojo.flash.obj = new dojo.flash.Embed(this._visible);
			dojo.flash.obj.write(dojo.flash.info.commVersion);
			
			// initialize the way we do Flash/JavaScript communication
			dojo.flash.comm = new dojo.flash.Communicator();
		}
	}
};


dojo.flash.Info = function(){
	// summary: A class that helps us determine whether Flash is available.
	// description:
	//	A class that helps us determine whether Flash is available,
	//	it's major and minor versions, and what Flash version features should
	//	be used for Flash/JavaScript communication. Parts of this code
	//	are adapted from the automatic Flash plugin detection code autogenerated 
	//	by the Macromedia Flash 8 authoring environment. 
	//	
	//	An instance of this class can be accessed on dojo.flash.info after
	//	the page is finished loading.
	//	
	//	This constructor must be called before the page is finished loading.	
	
	// Visual basic helper required to detect Flash Player ActiveX control 
	// version information on Internet Explorer
	if(dojo.render.html.ie){
		document.writeln('<script language="VBScript" type="text/vbscript"\>');
		document.writeln('Function VBGetSwfVer(i)');
		document.writeln('  on error resume next');
		document.writeln('  Dim swControl, swVersion');
		document.writeln('  swVersion = 0');
		document.writeln('  set swControl = CreateObject("ShockwaveFlash.ShockwaveFlash." + CStr(i))');
		document.writeln('  if (IsObject(swControl)) then');
		document.writeln('    swVersion = swControl.GetVariable("$version")');
		document.writeln('  end if');
		document.writeln('  VBGetSwfVer = swVersion');
		document.writeln('End Function');
		document.writeln('</script\>');
	}
	
	this._detectVersion();
	this._detectCommunicationVersion();
}

dojo.flash.Info.prototype = {
	// version: String
	//		The full version string, such as "8r22".
	version: -1,
	
	// versionMajor, versionMinor, versionRevision: String
	//		The major, minor, and revisions of the plugin. For example, if the
	//		plugin is 8r22, then the major version is 8, the minor version is 0,
	//		and the revision is 22. 
	versionMajor: -1,
	versionMinor: -1,
	versionRevision: -1,
	
	// capable: Boolean
	//		Whether this platform has Flash already installed.
	capable: false,
	
	// commVersion: int
	//		The major version number for how our Flash and JavaScript communicate.
	//		This can currently be the following values:
	//		6 - We use a combination of the Flash plugin methods, such as SetVariable
	//		and TCallLabel, along with fscommands, to do communication.
	//		8 - We use the ExternalInterface API. 
	//		-1 - For some reason neither method is supported, and no communication
	//		is possible. 
	commVersion: 6,
	
	// installing: Boolean
	//	Set if we are in the middle of a Flash installation session.
	installing: false,
	
	isVersionOrAbove: function(
							/* int */ reqMajorVer, 
							/* int */ reqMinorVer, 
							/* int */ reqVer){ /* Boolean */
		// summary: 
		//	Asserts that this environment has the given major, minor, and revision
		//	numbers for the Flash player.
		// description:
		//	Asserts that this environment has the given major, minor, and revision
		//	numbers for the Flash player. 
		//	
		//	Example- To test for Flash Player 7r14:
		//	
		//	dojo.flash.info.isVersionOrAbove(7, 0, 14)
		// returns:
		//	Returns true if the player is equal
		//	or above the given version, false otherwise.
		
		// make the revision a decimal (i.e. transform revision 14 into
		// 0.14
		reqVer = parseFloat("." + reqVer);
		
		if(this.versionMajor >= reqMajorVer && this.versionMinor >= reqMinorVer
			 && this.versionRevision >= reqVer){
			return true;
		}else{
			return false;
		}
	},
	
	_detectVersion: function(){
		var versionStr;
		
		// loop backwards through the versions until we find the newest version	
		for(var testVersion = 25; testVersion > 0; testVersion--){
			if(dojo.render.html.ie){
				versionStr = VBGetSwfVer(testVersion);
			}else{
				versionStr = this._JSFlashInfo(testVersion);		
			}
				
			if(versionStr == -1 ){
				this.capable = false; 
				return;
			}else if(versionStr != 0){
				var versionArray;
				if(dojo.render.html.ie){
					var tempArray = versionStr.split(" ");
					var tempString = tempArray[1];
					versionArray = tempString.split(",");
				}else{
					versionArray = versionStr.split(".");
				}
					
				this.versionMajor = versionArray[0];
				this.versionMinor = versionArray[1];
				this.versionRevision = versionArray[2];
				
				// 7.0r24 == 7.24
				var versionString = this.versionMajor + "." + this.versionRevision;
				this.version = parseFloat(versionString);
				
				this.capable = true;
				
				break;
			}
		}
	},
	 
	// JavaScript helper required to detect Flash Player PlugIn version 
	// information. Internet Explorer uses a corresponding Visual Basic
	// version to interact with the Flash ActiveX control. 
	_JSFlashInfo: function(testVersion){
		// NS/Opera version >= 3 check for Flash plugin in plugin array
		if(navigator.plugins != null && navigator.plugins.length > 0){
			if(navigator.plugins["Shockwave Flash 2.0"] || 
				 navigator.plugins["Shockwave Flash"]){
				var swVer2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
				var flashDescription = navigator.plugins["Shockwave Flash" + swVer2].description;
				var descArray = flashDescription.split(" ");
				var tempArrayMajor = descArray[2].split(".");
				var versionMajor = tempArrayMajor[0];
				var versionMinor = tempArrayMajor[1];
				if(descArray[3] != ""){
					var tempArrayMinor = descArray[3].split("r");
				}else{
					var tempArrayMinor = descArray[4].split("r");
				}
				var versionRevision = tempArrayMinor[1] > 0 ? tempArrayMinor[1] : 0;
				var version = versionMajor + "." + versionMinor + "." 
											+ versionRevision;
											
				return version;
			}
		}
		
		return -1;
	},
	
	// Detects the mechanisms that should be used for Flash/JavaScript 
	// communication, setting 'commVersion' to either 6 or 8. If the value is
	// 6, we use Flash Plugin 6+ features, such as GetVariable, TCallLabel,
	// and fscommand, to do Flash/JavaScript communication; if the value is
	// 8, we use the ExternalInterface API for communication. 
	_detectCommunicationVersion: function(){
		if(this.capable == false){
			this.commVersion = null;
			return;
		}
		
		// detect if the user has over-ridden the default flash version
		if (typeof djConfig["forceFlashComm"] != "undefined" &&
				typeof djConfig["forceFlashComm"] != null){
			this.commVersion = djConfig["forceFlashComm"];
			return;
		}
		
		// we prefer Flash 6 features over Flash 8, because they are much faster
		// and much less buggy
		
		// at this point, we don't have a flash file to detect features on,
		// so we need to instead look at the browser environment we are in
		if(dojo.render.html.safari == true || dojo.render.html.opera == true){
			this.commVersion = 8;
		}else{
			this.commVersion = 6;
		}
	}
};

dojo.flash.Embed = function(visible){
	// summary: A class that is used to write out the Flash object into the page.
	
	this._visible = visible;
}

dojo.flash.Embed.prototype = {
	// width: int
	//	The width of this Flash applet. The default is the minimal width
	//	necessary to show the Flash settings dialog. Current value is 
	//  215 pixels.
	width: 215,
	
	// height: int 
	//	The height of this Flash applet. The default is the minimal height
	//	necessary to show the Flash settings dialog. Current value is
	// 138 pixels.
	height: 138,
	
	// id: String
	// 	The id of the Flash object. Current value is 'flashObject'.
	id: "flashObject",
	
	// Controls whether this is a visible Flash applet or not.
	_visible: true,

	protocol: function(){
		switch(window.location.protocol){
			case "https:":
				return "https";
				break;
			default:
				return "http";
				break;
		}
	},
	
	write: function(/* String */ flashVer, /* Boolean? */ doExpressInstall){
		// summary: Writes the Flash into the page.
		// description:
		//	This must be called before the page
		//	is finished loading. 
		// flashVer: String
		//	The Flash version to write.
		// doExpressInstall: Boolean
		//	Whether to write out Express Install
		//	information. Optional value; defaults to false.
		
		//dojo.debug("write");
		if(dojo.lang.isUndefined(doExpressInstall)){
			doExpressInstall = false;
		}
		
		// determine our container div's styling
		var containerStyle = new dojo.string.Builder();
		containerStyle.append("width: " + this.width + "px; ");
		containerStyle.append("height: " + this.height + "px; ");
		if(this._visible == false){
			containerStyle.append("position: absolute; ");
			containerStyle.append("z-index: 10000; ");
			containerStyle.append("top: -1000px; ");
			containerStyle.append("left: -1000px; ");
		}
		containerStyle = containerStyle.toString();

		// figure out the SWF file to get and how to write out the correct HTML
		// for this Flash version
		var objectHTML;
		var swfloc;
		// Flash 6
		if(flashVer == 6){
			swfloc = dojo.flash.flash6_version;
			var dojoPath = djConfig.baseRelativePath;
			swfloc = swfloc + "?baseRelativePath=" + escape(dojoPath);
			objectHTML = 
						  '<embed id="' + this.id + '" src="' + swfloc + '" '
						+ '    quality="high" bgcolor="#ffffff" '
						+ '    width="' + this.width + '" height="' + this.height + '" '
						+ '    name="' + this.id + '" '
						+ '    align="middle" allowScriptAccess="sameDomain" '
						+ '    type="application/x-shockwave-flash" swLiveConnect="true" '
						+ '    pluginspage="'
						+ this.protocol()
						+ '://www.macromedia.com/go/getflashplayer">';
		}else{ // Flash 8
			swfloc = dojo.flash.flash8_version;
			var swflocObject = swfloc;
			var swflocEmbed = swfloc;
			var dojoPath = djConfig.baseRelativePath;
			if(doExpressInstall){
				// the location to redirect to after installing
				var redirectURL = escape(window.location);
				document.title = document.title.slice(0, 47) + " - Flash Player Installation";
				var docTitle = escape(document.title);
				swflocObject += "?MMredirectURL=" + redirectURL
				                + "&MMplayerType=ActiveX"
				                + "&MMdoctitle=" + docTitle
								+ "&baseRelativePath=" + escape(dojoPath);
				swflocEmbed += "?MMredirectURL=" + redirectURL 
								+ "&MMplayerType=PlugIn"
								+ "&baseRelativePath=" + escape(dojoPath);
			}

			if(swflocEmbed.indexOf("?") == -1){
				swflocEmbed +=  "?baseRelativePath="+escape(dojoPath)+"' ";
			}
			
			objectHTML =
				'<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" '
				  + 'codebase="'
					+ this.protocol()
					+ '://fpdownload.macromedia.com/pub/shockwave/cabs/flash/'
					+ 'swflash.cab#version=8,0,0,0" '
				  + 'width="' + this.width + '" '
				  + 'height="' + this.height + '" '
				  + 'id="' + this.id + '" '
				  + 'align="middle"> '
				  + '<param name="allowScriptAccess" value="sameDomain" /> '
				  + '<param name="movie" value="' + swflocObject + '" /> '
				  + '<param name="quality" value="high" /> '
				  + '<param name="bgcolor" value="#ffffff" /> '
				  + '<embed src="' + swflocEmbed + "' "
				  + 'quality="high" '
				  + 'bgcolor="#ffffff" '
				  + 'width="' + this.width + '" '
				  + 'height="' + this.height + '" '
				  + 'id="' + this.id + '" '
				  + 'name="' + this.id + '" '
				  + 'swLiveConnect="true" '
				  + 'align="middle" '
				  + 'allowScriptAccess="sameDomain" '
				  + 'type="application/x-shockwave-flash" '
				  + 'pluginspage="'
					+ this.protocol()
					+'://www.macromedia.com/go/getflashplayer" />'
				+ '</object>';
		}

		// now write everything out
		objectHTML = '<div id="' + this.id + 'Container" style="' + containerStyle + '"> '
						+ objectHTML
					 + '</div>';
		document.writeln(objectHTML);
	},  
	
	get: function(){ /* Object */
		// summary: Gets the Flash object DOM node.
		
		//return (dojo.render.html.ie) ? window[this.id] : document[this.id];
		
		// more robust way to get Flash object; version above can break
		// communication on IE sometimes
		return document.getElementById(this.id);
	},
	
	setVisible: function(/* Boolean */ visible){
		// summary: Sets the visibility of this Flash object.
		
		var container = dojo.byId(this.id + "Container");
		if(visible == true){
			container.style.visibility = "visible";
		}else{
			container.style.position = "absolute";
			container.style.x = "-1000px";
			container.style.y = "-1000px";
			container.style.visibility = "hidden";
		}
	},
	
	center: function(){
		// summary: Centers the flash applet on the page.
		
		var elementWidth = this.width;
		var elementHeight = this.height;

		var scroll_offset = dojo.html.getScroll().offset;
		var viewport_size = dojo.html.getViewport();

		// compute the centered position    
		var x = scroll_offset.x + (viewport_size.width - elementWidth) / 2;
		var y = scroll_offset.y + (viewport_size.height - elementHeight) / 2; 

		// set the centered position
		var container = dojo.byId(this.id + "Container");
		container.style.top = y + "px";
		container.style.left = x + "px";
	}
};


dojo.flash.Communicator = function(){
	// summary:
	//	A class that is used to communicate between Flash and JavaScript in 
	//	a way that can pass large amounts of data back and forth reliably,
	//	very fast, and with synchronous method calls.
	// description: 
	//	A class that is used to communicate between Flash and JavaScript in 
	//	a way that can pass large amounts of data back and forth reliably,
	//	very fast, and with synchronous method calls. This class encapsulates the