/*


 * sIFR - jQuery plugin for accessible, unobtrusive flash image replacement.


 *


 * Based upon the work of Mike Davidson, Shaun Inman, Tomas Jogin and Mark


 * Wubben. Mike Davidson released his software under the CC-GNU LGPL


 * http://creativecommons.org/licenses/LGPL/2.1/


 *


 * Since this is my own rewrite of his implementation, (ONLY) this plugin


 * is licensed under thesame conditions as other plugins from jQuery.


 *


 * NOTE: Transparency is not supported in Opera 7.x, Safari < 1.2 &amp; Flash 6,


 * in Linux, and in very old (pre 1.0) Mozilla versions. (NOT CHECKED FOR!!)


 *


 * I choose NOT to do so many checks on the passed parameters, since i think


 * we can assume people have the right browser if they are running jQuery.


 *


 * For more configuration options, see the original sifr documentation at the


 * website of Mike Davidson: http://www.mikeindustries.com/sifr/


 *


 * Copyright (c) 2006 Gilles van den Hoven (webunity.nl)


 * Dual licensed under the MIT and GPL licenses:


 *   http://www.opensource.org/licenses/mit-license.html


 *   http://www.gnu.org/licenses/gpl.html


 *


 * v0.1


 */





jQuery.sifr =	{


	blnFlashValid: null,


	/**


	 * Trys to retreive the Flash version from the visitor's browser


	 * @acces private


	 * @param integer major version


	 * @param integer minor version


	 * @param integer revision version


	 */


	_checkFlash: function(intMajor, intMinor, intRevision) {


		var arrFlash = null;


		var strFlash = '';





		// First check


		if (navigator.plugins && navigator.mimeTypes.length) {


			var objFlash = navigator.plugins["Shockwave Flash"];


			if (objFlash && objFlash.description)


				arrFlash = objFlash.description.replace(/([a-zA-Z]|\s)+/, "").replace(/(\s+r|\s+b[0-9]+)/, ".").split(".");


			objFlash = null;


		}





		// Second attempt


		if (!arrFlash) {


			try {


				var objFlash = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");


			} catch(errB) {


				try {


					arrFlash = [6, 0, 21];





					// Create object


					var objFlash = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");





					// Throws if player version < 6.0.47


					objFlash.AllowScriptAccess = "always";





					// If we came here, we can do a version lookup


					if (objFlash && objFlash.major)


						arrFlash = [objFlash.major, objFlash.minor, objFlash.revision];


					objFlash = null;


				} catch(errC) {


					arrFlash = [0, 0, 0];//this was not here, but I added it and now it fails silently if no flash


				}


			}





			// Third attempt (geez!)


			if (!arrFlash) {


				try {


					objFlash = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");


					arrFlash = objFlash.GetVariable("$version").split(" ")[1].split(",");


					objFlash = null;


				} catch(errA) {


					arrFlash = [0, 0, 0];


				}


			}


		}





		//alert('<DEBUG> Your flash version is: ' + arrFlash[0] + '.' + arrFlash[1] + '.' + arrFlash[2]);





		// Set variable


		jQuery.sifr.blnFlashValid = ((arrFlash[0] >= intMajor) &&


																(arrFlash[1] >= intMinor) &&


																(arrFlash[2] >= intRevision));


	},


	/**


	 * Escape the input value


	 * @acces private


	 * @param string to convert


	 */


	_escapeHex: function(strInput){


		if(jQuery.browser.msie){ /* The RegExp for IE breaks old Gecko's, the RegExp for non-IE breaks IE 5.01 */


			return strInput.replace(new RegExp("%\d{0}", "g"), "%25");


		}


		return strInput.replace(new RegExp("%(?!\d)", "g"), "%25");


	},


	/**


	 * Retreives and rebuilds the contents of this node.


	 * @acces private


	 */


	_fetchContent: function(objNode, objNodeNew, strCase, intLinks, strLinkVars) {


		var strContent = "";


		var objSearch = objNode.firstChild;


		var objRemove, objNodeRemoved, objTemp, sValue;





		if (intLinks == null)


			intLinks = 0;





		if (strLinkVars == null)


			strLinkVars = "";





		while (objSearch) {


			if (objSearch.nodeType == 3) {


				sValue = objSearch.nodeValue.replace("<", "&lt;");


				switch(strCase) {


					case "lower":


						strContent+= sValue.toLowerCase();


						break;


					case "upper":


						strContent+= sValue.toUpperCase();


						break;


					default:


						strContent+= sValue;


				}


			} else if(objSearch.nodeType == 1) {


				if (jQuery.sifr._matchNodeName(objSearch, "a") && !objSearch.getAttribute("href") == false) {


					if (objSearch.getAttribute("target"))


						strLinkVars+= "&sifr_url_" + intLinks + "_target=" + objSearch.getAttribute("target");





					strLinkVars+= "&sifr_url_" + intLinks + "=" + jQuery.sifr._escapeHex(objSearch.getAttribute("href")).replace(/&/g, "%26");


					strContent+= '<a href="asfunction:_root.launchURL,' + intLinks + '">';


					intLinks++;


				} else if (jQuery.sifr._matchNodeName(objSearch, "br")) {


					strContent+= "<br/>";


				}





				// Fetch information about the childnodes


				if (objSearch.hasChildNodes()) {


					// The childNodes are already copied with this node, so objNodeNew = null


					objTemp = jQuery.sifr._fetchContent(objSearch, null, strCase, intLinks, strLinkVars);


					strContent+= objTemp.strContent;


					intLinks = objTemp.intLinks;


					strLinkVars = objTemp.strLinkVars;


					objTemp = null;


				}





				// Add the closing tag


				if (jQuery.sifr._matchNodeName(objSearch, "a")){


					strContent+= "</a>";


				}


			}


			objRemove = objSearch;


			objSearch = objSearch.nextSibling;





			if (objNodeNew != null){


				objNodeRemoved = objRemove.parentNode.removeChild(objRemove);


				objNodeNew.appendChild(objNodeRemoved);


			}


		}





		return { 'strContent': strContent, 'intLinks': intLinks, 'strLinkVars': strLinkVars };


	},


	/**


	 * Look if the matched node matches


	 * @acces private


	 * @param object to check


	 * @param string to match


	 */


	_matchNodeName: function(objNode, strMatch){


		return (strMatch == "*") ? true : (objNode.nodeName.toLowerCase().replace("html:", "") == strMatch.toLowerCase());


	},


	/**


	 * Helper function to support older browsers!


	 */


	_normalize: function(strInput) {


		return strInput.replace(/\s+/g, " ");


	},


	/**


	 * Main build function


	 * @acces public


	 * @param hash of options


	 */


	build: function(arrConfig) {


		var arrOptions = jQuery.extend({


			intRequiredFlashVersion: [6, 0, 0],


			strSWF: '',


			strColor: '#000000',


			strBgColor: '',


			strLinkColor: '',


			strHoverColor: '',


			intPadding: [0, 0, 0, 0],	// Left, top, right, bottom


			strFlashVars: '',


			strCase: '',


			strWmode: ''							// empty/'transparent'/'opaque'


		}, arrConfig || {});





		// Check config


		if (arrOptions.intPadding.length != 4) {


			alert('Wrong number of arguments for the padding!');


			return;


		}





		// helper to check for required flash version (do this only once per pageload)


		if (!jQuery.sifr.blnFlashValid) {


			jQuery.sifr._checkFlash(arrOptions.intRequiredFlashVersion[0], arrOptions.intRequiredFlashVersion[1], arrOptions.intRequiredFlashVersion[2]);


		}





		// Initialize flashvars


		if(arrOptions.strFlashVars != '')


			arrOptions.strFlashVars = jQuery.sifr._normalize(arrOptions.strFlashVars);





		// Remove &amp; from the start


		if (arrOptions.strFlashVars.substr(0, 1) == '&')


			arrOptions.strFlashVars = arrOptions.strFlashVars.substr(1, arrOptions.strFlashVars.length);





		// Initialize colors


		if(arrOptions.strColor != '')


			arrOptions.strFlashVars+= "textcolor=" + arrOptions.strColor + '&';





		if (arrOptions.strHoverColor != null)


			arrOptions.strFlashVars+= 'hovercolor=' + arrOptions.strHoverColor + '&';





		if ((arrOptions.strLinkColor != null) || (arrOptions.strHoverColor != null))


			arrOptions.strFlashVars+= 'linkcolor=' + (arrOptions.strLinkColor || arrOptions.strColor) + '&';





	  // initialize sIFR


	  return this.each(function() {


	  	// Handle to object


	  	jqThis = jQuery(this);





	  	// Only continue if we support flash and haven't replaced allready


	  	if (jQuery.sifr.blnFlashValid && !jqThis.is('.sIFR-flash')) {


	  		// Calculate new width and height


	  		intWidth = parseInt(this.offsetWidth);


	  		intHeight = parseInt(this.offsetHeight);





	  		// If this fails, we don't have a width and height set, WHICH MUST BE THE CASE


	  		if (isNaN(intWidth) || isNaN(intHeight)) {


	  			alert('fook it');


	  			return;


	  		}





				// Remove padding


	  		intWidth-= (arrOptions.intPadding[0] +  arrOptions.intPadding[2]);


	  		intHeight-= (arrOptions.intPadding[1] +  arrOptions.intPadding[3]);





				// Make sure an &amp; is at the end of the flashvars


				if (arrOptions.strFlashVars.substr(arrOptions.strFlashVars.length, 1) != '&')


					arrOptions.strFlashVars+= '&';





	  		// Build variables


				objAlternate = jQuery('<span class="sIFR-alternate"></span>')[0];


	  		objContent = jQuery.sifr._fetchContent(this, objAlternate, arrOptions.strCase);


				strVars = "txt=" + jQuery.sifr._normalize(jQuery.sifr._escapeHex(objContent.strContent).replace(/\+/g, "%2B").replace(/&/g, "%26").replace(/\"/g, "%22")) + '&';


				strVars+= arrOptions.strFlashVars;


				strVars+= "w=" + intWidth + "&h=" + intHeight + objContent.strLinkVars;


				objContent = null;





				// Generate!


				if (!jQuery.browser.msie) {


					strHTML = '<embed type="application/x-shockwave-flash" src="' + arrOptions.strSWF + '" quality="best" ';


					strHTML+= (arrOptions.strWmode != '') ? 'wmode="' + arrOptions.strWmode + '" ' : '';


					strHTML+= (arrOptions.strBgColor != '') ? 'bgcolor="' + arrOptions.strBgColor + '" ' : '';


					strHTML+= 'flashvars="' + strVars + '" width="' + intWidth + '" height="' + intHeight + '"></embed>';


				} else {


					strHTML = '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="' + intWidth + '" height="' + intHeight + '">';


					strHTML+= '<param name="movie" value="' + arrOptions.strSWF + "?" + strVars + '"></param>';


					strHTML+= '<param name="quality" value="best"></param>';


					strHTML+= (arrOptions.strWmode != '') ? '<param name="wmode" value="' + arrOptions.strWmode + '"></param>' : '';


					strHTML+= (arrOptions.strBgColor != '') ? '<param name="bgcolor" value="' + arrOptions.strBgColor + '"></param>' : '';


					strHTML+= '</object>';


				}





				// Build the sifr tag


	  		jqThis.addClass('sIFR-flash').empty().append(objAlternate).append(strHTML);





	  		// Fix MSIE flash issue


	  		if (jQuery.browser.msie) {


	  			this.outerHTML = this.outerHTML;


	  		}


	  	}


	  });


	}


};





// Extend jQuery


jQuery.fn.extend( {


		sifr : jQuery.sifr.build


});