# Yahoo! UI Library

### SWF Utility 2.8.2r1

Yahoo! UI Library > swf > swf.js (source view)
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    YAHOO.namespace("widget");

    (function () {

    	var version = 0;
    	var UA = YAHOO.env.ua;
    	var sF = "ShockwaveFlash";

    	 	if (UA.gecko || UA.webkit || UA.opera) {
    			   if ((mF = navigator.mimeTypes['application/x-shockwave-flash'])) {
    			      if ((eP = mF.enabledPlugin)) {
    					 var vS = [];
    			         vS = eP.description.replace(/\s[rd]/g, '.').replace(/[A-Za-z\s]+/g, '').split('.');
    			        version = vS[0] + '.';
    					switch((vS[2].toString()).length)
    					{
    						case 1:
    						version += "00";
    						break;
    						case 2:
    						version += "0";
    						break;
    					}
    			 		version +=  vS[2];
    					version = parseFloat(version);
    			      }
    			   }
    			}
    			else if(UA.ie) {
    			    try
    			    {
    			        var ax6 = new ActiveXObject(sF + "." + sF + ".6");
    			        ax6.AllowScriptAccess = "always";
    			    }
    			    catch(e)
    			    {
    			        if(ax6 != null)
    			        {
    			            version = 6.0;
    			        }
    			    }
    			    if (version == 0) {
    			    try
    			    {
    			        var ax  = new ActiveXObject(sF + "." + sF);
    			       	var vS = [];
    			        vS = ax.GetVariable("$version").replace(/[A-Za-z\s]+/g, '').split(',');
    			        version = vS[0] + '.';
    					switch((vS[2].toString()).length)
    					{
    						case 1:
    						version += "00";
    						break;
    						case 2:
    						version += "0";
    						break;
    					}
    			 		version +=  vS[2];
    					version = parseFloat(version);

    			    } catch (e) {}
    			    }
    			}

    			UA.flash = version;

    	YAHOO.util.SWFDetect = {
    			getFlashVersion : function () {
    				return version;
    			},

    			isFlashVersionAtLeast : function (ver) {
    				return version >= ver;
    			}
    		};

    	var Dom = YAHOO.util.Dom,
            Event = YAHOO.util.Event,
            SWFDetect = YAHOO.util.SWFDetect,
            Lang = YAHOO.lang,

    		// private
    		FLASH_CID = "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000",
    		FLASH_TYPE = "application/x-shockwave-flash",
    		FLASH_VER = "10.22",
    		EXPRESS_INSTALL_URL = "http://fpdownload.macromedia.com/pub/flashplayer/update/current/swf/autoUpdater.swf?" + Math.random(),
    		EVENT_HANDLER = "YAHOO.widget.SWF.eventHandler",
    		possibleAttributes = {align:"", allowNetworking:"", allowScriptAccess:"", base:"", bgcolor:"", menu:"", name:"", quality:"", salign:"", scale:"", tabindex:"", wmode:""};

    		/**
    		 * The SWF utility is a tool for embedding Flash applications in HTMl pages.
    		 * @module swf
    		 * @title SWF Utility
    		 * @requires yahoo, dom, event
    		 * @namespace YAHOO.widget
    		 */

    		/**
    		 * Creates the SWF instance and keeps the configuration data
    		 *
    		 * @class SWF
    		 * @extends YAHOO.util.Element
    		 * @constructor
    		 * @param {String|HTMLElement} id The id of the element, or the element itself that the SWF will be inserted into.
    		 *        The width and height of the SWF will be set to the width and height of this container element.
    		 * @param {String} swfURL The URL of the SWF to be embedded into the page.
    		 * @param {Object} p_oAttributes (optional) Configuration parameters for the Flash application and values for Flashvars
    		 *        to be passed to the SWF.
    		 */

    YAHOO.widget.SWF = function (p_oElement /*:String*/, swfURL /*:String*/, p_oAttributes /*:Object*/ ) {

    	this._queue = this._queue || [];
    	this._events = this._events || {};
    	this._configs = this._configs || {};

    	/**
         * The DOM id of this instance of the element. Automatically generated.
         * @property _id
         * @type String
         */
    	this._id = Dom.generateId(null, "yuiswf");

    	if(p_oAttributes.host) this._host = p_oAttributes.host;

    	var _id = this._id;
        var oElement = Dom.get(p_oElement);
    	var flashVersion = (p_oAttributes["version"] || FLASH_VER);
    	var isFlashVersionRight = SWFDetect.isFlashVersionAtLeast(flashVersion);
    	var canExpressInstall = (UA.flash >= 8.0);
    	var shouldExpressInstall = canExpressInstall && !isFlashVersionRight && p_oAttributes["useExpressInstall"];
    	var flashURL = (shouldExpressInstall)?EXPRESS_INSTALL_URL:swfURL;
    	var objstring = '<object ';
    	var w, h;
    	var flashvarstring = "YUISwfId=" + _id + "&YUIBridgeCallback=" + EVENT_HANDLER;

    	YAHOO.widget.SWF._instances[_id] = this;

        if (oElement && (isFlashVersionRight || shouldExpressInstall) && flashURL) {
    				objstring += 'id="' + _id + '" ';
    				if (UA.ie) {
    					objstring += 'classid="' + FLASH_CID + '" '
    				}
    				else {
    					objstring += 'type="' + FLASH_TYPE + '" data="' + flashURL + '" ';
    				}

                    w = "100%";
    				h = "100%";

    				objstring += 'width="' + w + '" height="' + h + '">';

    				if (UA.ie) {
    					objstring += '<param name="movie" value="' + flashURL + '"/>';
    				}

    				for (var attribute in p_oAttributes.fixedAttributes) {
    					if (possibleAttributes.hasOwnProperty(attribute)) {
    						objstring += '<param name="' + attribute + '" value="' + p_oAttributes.fixedAttributes[attribute] + '"/>';
    					}
    				}

    				for (var flashvar in p_oAttributes.flashVars) {
    					var fvar = p_oAttributes.flashVars[flashvar];
    					if (Lang.isString(fvar)) {
    						flashvarstring += "&" + flashvar + "=" + encodeURIComponent(fvar);
    					}
    				}

    				if (flashvarstring) {
    					objstring += '<param name="flashVars" value="' + flashvarstring + '"/>';
    				}

    				objstring += "</object>";

    				oElement.innerHTML = objstring;
    			}

    			YAHOO.widget.SWF.superclass.constructor.call(this, Dom.get(_id));
    			this._swf = Dom.get(_id);
    };

    /**
     * The static collection of all instances of the SWFs on the page.
     * @property _instances
     * @private
     * @type Object
     */

    YAHOO.widget.SWF._instances = YAHOO.widget.SWF._instances || {};

    /**
     * Handles an event coming from within the SWF and delegate it
     * to a specific instance of SWF.
     * @method eventHandler
     * @param swfid {String} the id of the SWF dispatching the event
     * @param event {Object} the event being transmitted.
     * @private
     */
    YAHOO.widget.SWF.eventHandler = function (swfid, event) {
    	YAHOO.widget.SWF._instances[swfid]._eventHandler(event);
    };

    YAHOO.extend(YAHOO.widget.SWF, YAHOO.util.Element, {
    	_eventHandler: function(event)
    	{
    		if (event.type == "swfReady")
    		{
    			this.createEvent("swfReady", {fireOnce:true});
    	     	this.fireEvent("swfReady", event);
            }
    		else if(event.type == "log")
    		{
    			YAHOO.log(event.message, event.category, this._host ? this._host.toString() : this.toString());
    		}
            else
    		{
    	    	if(this._host && this._host.fireEvent)
    			{
    				this._host.fireEvent(event.type, event);
    			}
    			else
    			{
    				this.fireEvent(event.type, event);
    			}
            }
    	},

    	/**
    	 * Calls a specific function exposed by the SWF's
    	 * ExternalInterface.
    	 * @method callSWF
    	 * @param func {String} the name of the function to call
    	 * @param args {Object} the set of arguments to pass to the function.
    	 */
    	callSWF: function (func, args)
    	{
    		if (!args) {
    			  args= [];
    		};

    		if (this._swf[func]) {
    		return(this._swf[func].apply(this._swf, args));
    	    } else {
    		return null;
    	    }
    	},

    	/**
    	 * Public accessor to the unique name of the SWF instance.
    	 *
    	 * @method toString
    	 * @return {String} Unique name of the SWF instance.
    	 */
    	toString: function()
    	{
    		return "SWF " + this._id;
    	}
    });

    })();

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