lib/ufo.js

   1 /*      Unobtrusive Flash Objects (UFO) v3.22 <http://www.bobbyvandersluis.com/ufo/>
   2         Copyright 2005-2007 Bobby van der Sluis
   3         This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/>
   4
   5     CONTAINS MINOR CHANGE FOR MOODLE (bottom code for MDL-9825)
   6 */
   7
   8 var UFO = {
   9         req: ["movie", "width", "height", "majorversion", "build"],
  10         opt: ["play", "loop", "menu", "quality", "scale", "salign", "wmode", "bgcolor", "base", "flashvars", "devicefont", "allowscriptaccess", "seamlesstabbing", "allowfullscreen", "allownetworking"],
  11         optAtt: ["id", "name", "align"],
  12         optExc: ["swliveconnect"],
  13         ximovie: "ufo.swf",
  14         xiwidth: "215",
  15         xiheight: "138",
  16         ua: navigator.userAgent.toLowerCase(),
  17         pluginType: "",
  18         fv: [0,0],
  19         foList: [],
  20
  21         create: function(FO, id) {
  22                 if (!UFO.uaHas("w3cdom") || UFO.uaHas("ieMac")) return;
  23                 UFO.getFlashVersion();
  24                 UFO.foList[id] = UFO.updateFO(FO);
  25                 UFO.createCSS("#" + id, "visibility:hidden;");
  26                 UFO.domLoad(id);
  27         },
  28
  29         updateFO: function(FO) {
  30                 if (typeof FO.xi != "undefined" && FO.xi == "true") {
  31                         if (typeof FO.ximovie == "undefined") FO.ximovie = UFO.ximovie;
  32                         if (typeof FO.xiwidth == "undefined") FO.xiwidth = UFO.xiwidth;
  33                         if (typeof FO.xiheight == "undefined") FO.xiheight = UFO.xiheight;
  34                 }
  35                 FO.mainCalled = false;
  36                 return FO;
  37         },
  38
  39         domLoad: function(id) {
  40                 var _t = setInterval(function() {
  41                         if ((document.getElementsByTagName("body")[0] != null || document.body != null) && document.getElementById(id) != null) {
  42                                 UFO.main(id);
  43                                 clearInterval(_t);
  44                         }
  45                 }, 250);
  46                 if (typeof document.addEventListener != "undefined") {
  47                         document.addEventListener("DOMContentLoaded", function() { UFO.main(id); clearInterval(_t); } , null); // Gecko, Opera 9+
  48                 }
  49         },
  50
  51         main: function(id) {
  52                 var _fo = UFO.foList[id];
  53                 if (_fo.mainCalled) return;
  54                 UFO.foList[id].mainCalled = true;
  55                 document.getElementById(id).style.visibility = "hidden";
  56                 if (UFO.hasRequired(id)) {
  57                         if (UFO.hasFlashVersion(parseInt(_fo.majorversion, 10), parseInt(_fo.build, 10))) {
  58                                 if (typeof _fo.setcontainercss != "undefined" && _fo.setcontainercss == "true") UFO.setContainerCSS(id);
  59                                 UFO.writeSWF(id);
  60                         }
  61                         else if (_fo.xi == "true" && UFO.hasFlashVersion(6, 65)) {
  62                                 UFO.createDialog(id);
  63                         }
  64                 }
  65                 document.getElementById(id).style.visibility = "visible";
  66         },
  67
  68         createCSS: function(selector, declaration) {
  69                 var _h = document.getElementsByTagName("head")[0];
  70                 var _s = UFO.createElement("style");
  71                 if (!UFO.uaHas("ieWin")) _s.appendChild(document.createTextNode(selector + " {" + declaration + "}")); // bugs in IE/Win
  72                 _s.setAttribute("type", "text/css");
  73                 _s.setAttribute("media", "screen");
  74                 _h.appendChild(_s);
  75                 if (UFO.uaHas("ieWin") && document.styleSheets && document.styleSheets.length > 0) {
  76                         var _ls = document.styleSheets[document.styleSheets.length - 1];
  77                         if (typeof _ls.addRule == "object") _ls.addRule(selector, declaration);
  78                 }
  79         },
  80
  81         setContainerCSS: function(id) {
  82                 var _fo = UFO.foList[id];
  83                 var _w = /%/.test(_fo.width) ? "" : "px";
  84                 var _h = /%/.test(_fo.height) ? "" : "px";
  85                 UFO.createCSS("#" + id, "width:" + _fo.width + _w +"; height:" + _fo.height + _h +";");
  86                 if (_fo.width == "100%") {
  87                         UFO.createCSS("body", "margin-left:0; margin-right:0; padding-left:0; padding-right:0;");
  88                 }
  89                 if (_fo.height == "100%") {
  90                         UFO.createCSS("html", "height:100%; overflow:hidden;");
  91                         UFO.createCSS("body", "margin-top:0; margin-bottom:0; padding-top:0; padding-bottom:0; height:100%;");
  92                 }
  93         },
  94
  95         createElement: function(el) {
  96                 return (UFO.uaHas("xml") && typeof document.createElementNS != "undefined") ?  document.createElementNS("http://www.w3.org/1999/xhtml", el) : document.createElement(el);
  97         },
  98
  99         createObjParam: function(el, aName, aValue) {
 100                 var _p = UFO.createElement("param");
 101                 _p.setAttribute("name", aName);
 102                 _p.setAttribute("value", aValue);
 103                 el.appendChild(_p);
 104         },
 105
 106         uaHas: function(ft) {
 107                 var _u = UFO.ua;
 108                 switch(ft) {
 109                         case "w3cdom":
 110                                 return (typeof document.getElementById != "undefined" && typeof document.getElementsByTagName != "undefined" && (typeof document.createElement != "undefined" || typeof document.createElementNS != "undefined"));
 111                         case "xml":
 112                                 var _m = document.getElementsByTagName("meta");
 113                                 var _l = _m.length;
 114                                 for (var i = 0; i < _l; i++) {
 115                                         if (/content-type/i.test(_m[i].getAttribute("http-equiv")) && /xml/i.test(_m[i].getAttribute("content"))) return true;
 116                                 }
 117                                 return false;
 118                         case "ieMac":
 119                                 return /msie/.test(_u) && !/opera/.test(_u) && /mac/.test(_u);
 120                         case "ieWin":
 121                                 return /msie/.test(_u) && !/opera/.test(_u) && /win/.test(_u);
 122                         case "gecko":
 123                                 return /gecko/.test(_u) && !/applewebkit/.test(_u);
 124                         case "opera":
 125                                 return /opera/.test(_u);
 126                         case "safari":
 127                                 return /applewebkit/.test(_u);
 128                         default:
 129                                 return false;
 130                 }
 131         },
 132
 133         getFlashVersion: function() {
 134                 if (UFO.fv[0] != 0) return;
 135                 if (navigator.plugins && typeof navigator.plugins["Shockwave Flash"] == "object") {
 136                         UFO.pluginType = "npapi";
 137                         var _d = navigator.plugins["Shockwave Flash"].description;
 138                         if (typeof _d != "undefined") {
 139                                 _d = _d.replace(/^.*\s+(\S+\s+\S+$)/, "$1");
 140                                 var _m = parseInt(_d.replace(/^(.*)\..*$/, "$1"), 10);
 141                                 var _r = /r/.test(_d) ? parseInt(_d.replace(/^.*r(.*)$/, "$1"), 10) : 0;
 142                                 UFO.fv = [_m, _r];
 143                         }
 144                 }
 145                 else if (window.ActiveXObject) {
 146                         UFO.pluginType = "ax";
 147                         try { // avoid fp 6 crashes
 148                                 var _a = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");
 149                         }
 150                         catch(e) {
 151                                 try {
 152                                         var _a = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");
 153                                         UFO.fv = [6, 0];
 154                                         _a.AllowScriptAccess = "always"; // throws if fp < 6.47
 155                                 }
 156                                 catch(e) {
 157                                         if (UFO.fv[0] == 6) return;
 158                                 }
 159                                 try {
 160                                         var _a = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
 161                                 }
 162                                 catch(e) {}
 163                         }
 164                         if (typeof _a == "object") {
 165                                 var _d = _a.GetVariable("$version"); // bugs in fp 6.21/6.23
 166                                 if (typeof _d != "undefined") {
 167                                         _d = _d.replace(/^\S+\s+(.*)$/, "$1").split(",");
 168                                         UFO.fv = [parseInt(_d[0], 10), parseInt(_d[2], 10)];
 169                                 }
 170                         }
 171                 }
 172         },
 173
 174         hasRequired: function(id) {
 175                 var _l = UFO.req.length;
 176                 for (var i = 0; i < _l; i++) {
 177                         if (typeof UFO.foList[id][UFO.req[i]] == "undefined") return false;
 178                 }
 179                 return true;
 180         },
 181
 182         hasFlashVersion: function(major, release) {
 183                 return (UFO.fv[0] > major || (UFO.fv[0] == major && UFO.fv[1] >= release)) ? true : false;
 184         },
 185
 186         writeSWF: function(id) {
 187                 var _fo = UFO.foList[id];
 188                 var _e = document.getElementById(id);
 189                 if (UFO.pluginType == "npapi") {
 190                         if (UFO.uaHas("gecko") || UFO.uaHas("xml")) {
 191                                 while(_e.hasChildNodes()) {
 192                                         _e.removeChild(_e.firstChild);
 193                                 }
 194                                 var _obj = UFO.createElement("object");
 195                                 _obj.setAttribute("type", "application/x-shockwave-flash");
 196                                 _obj.setAttribute("data", _fo.movie);
 197                                 _obj.setAttribute("width", _fo.width);
 198                                 _obj.setAttribute("height", _fo.height);
 199                                 var _l = UFO.optAtt.length;
 200                                 for (var i = 0; i < _l; i++) {
 201                                         if (typeof _fo[UFO.optAtt[i]] != "undefined") _obj.setAttribute(UFO.optAtt[i], _fo[UFO.optAtt[i]]);
 202                                 }
 203                                 var _o = UFO.opt.concat(UFO.optExc);
 204                                 var _l = _o.length;
 205                                 for (var i = 0; i < _l; i++) {
 206                                         if (typeof _fo[_o[i]] != "undefined") UFO.createObjParam(_obj, _o[i], _fo[_o[i]]);
 207                                 }
 208                                 _e.appendChild(_obj);
 209                         }
 210                         else {
 211                                 var _emb = "";
 212                                 var _o = UFO.opt.concat(UFO.optAtt).concat(UFO.optExc);
 213                                 var _l = _o.length;
 214                                 for (var i = 0; i < _l; i++) {
 215                                         if (typeof _fo[_o[i]] != "undefined") _emb += ' ' + _o[i] + '="' + _fo[_o[i]] + '"';
 216                                 }
 217                                 _e.innerHTML = '<embed type="application/x-shockwave-flash" src="' + _fo.movie + '" width="' + _fo.width + '" height="' + _fo.height + '" pluginspage="http://www.macromedia.com/go/getflashplayer"' + _emb + '></embed>';
 218                         }
 219                 }
 220                 else if (UFO.pluginType == "ax") {
 221                         var _objAtt = "";
 222                         var _l = UFO.optAtt.length;
 223                         for (var i = 0; i < _l; i++) {
 224                                 if (typeof _fo[UFO.optAtt[i]] != "undefined") _objAtt += ' ' + UFO.optAtt[i] + '="' + _fo[UFO.optAtt[i]] + '"';
 225                         }
 226                         var _objPar = "";
 227                         var _l = UFO.opt.length;
 228                         for (var i = 0; i < _l; i++) {
 229                                 if (typeof _fo[UFO.opt[i]] != "undefined") _objPar += '<param name="' + UFO.opt[i] + '" value="' + _fo[UFO.opt[i]] + '" />';
 230                         }
 231                         var _p = window.location.protocol == "https:" ? "https:" : "http:";
 232                         _e.innerHTML = '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"' + _objAtt + ' width="' + _fo.width + '" height="' + _fo.height + '" codebase="' + _p + '//download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=' + _fo.majorversion + ',0,' + _fo.build + ',0"><param name="movie" value="' + _fo.movie + '" />' + _objPar + '</object>';
 233                 }
 234         },
 235
 236         createDialog: function(id) {
 237                 var _fo = UFO.foList[id];
 238                 UFO.createCSS("html", "height:100%; overflow:hidden;");
 239                 UFO.createCSS("body", "height:100%; overflow:hidden;");
 240                 UFO.createCSS("#xi-con", "position:absolute; left:0; top:0; z-index:1000; width:100%; height:100%; background-color:#fff; filter:alpha(opacity:75); opacity:0.75;");
 241                 UFO.createCSS("#xi-dia", "position:absolute; left:50%; top:50%; margin-left: -" + Math.round(parseInt(_fo.xiwidth, 10) / 2) + "px; margin-top: -" + Math.round(parseInt(_fo.xiheight, 10) / 2) + "px; width:" + _fo.xiwidth + "px; height:" + _fo.xiheight + "px;");
 242                 var _b = document.getElementsByTagName("body")[0];
 243                 var _c = UFO.createElement("div");
 244                 _c.setAttribute("id", "xi-con");
 245                 var _d = UFO.createElement("div");
 246                 _d.setAttribute("id", "xi-dia");
 247                 _c.appendChild(_d);
 248                 _b.appendChild(_c);
 249                 var _mmu = window.location;
 250                 if (UFO.uaHas("xml") && UFO.uaHas("safari")) {
 251                         var _mmd = document.getElementsByTagName("title")[0].firstChild.nodeValue = document.getElementsByTagName("title")[0].firstChild.nodeValue.slice(0, 47) + " - Flash Player Installation";
 252                 }
 253                 else {
 254                         var _mmd = document.title = document.title.slice(0, 47) + " - Flash Player Installation";
 255                 }
 256                 var _mmp = UFO.pluginType == "ax" ? "ActiveX" : "PlugIn";
 257                 var _uc = typeof _fo.xiurlcancel != "undefined" ? "&xiUrlCancel=" + _fo.xiurlcancel : "";
 258                 var _uf = typeof _fo.xiurlfailed != "undefined" ? "&xiUrlFailed=" + _fo.xiurlfailed : "";
 259                 UFO.foList["xi-dia"] = { movie:_fo.ximovie, width:_fo.xiwidth, height:_fo.xiheight, majorversion:"6", build:"65", flashvars:"MMredirectURL=" + _mmu + "&MMplayerType=" + _mmp + "&MMdoctitle=" + _mmd + _uc + _uf };
 260                 UFO.writeSWF("xi-dia");
 261         },
 262
 263         expressInstallCallback: function() {
 264                 var _b = document.getElementsByTagName("body")[0];
 265                 var _c = document.getElementById("xi-con");
 266                 _b.removeChild(_c);
 267                 UFO.createCSS("body", "height:auto; overflow:auto;");
 268                 UFO.createCSS("html", "height:auto; overflow:auto;");
 269         },
 270
 271         cleanupIELeaks: function() {
 272                 var _o = document.getElementsByTagName("object");
 273                 var _l = _o.length
 274                 for (var i = 0; i < _l; i++) {
 275                         _o[i].style.display = "none";
 276             var j = 0;
 277                         for (var x in _o[i]) {
 278                 j++;
 279                                 if (typeof _o[i][x] == "function") {
 280                                         _o[i][x] = null;
 281                                 }
 282                 if (j > 1000) {
 283                     // something is wrong, probably infinite loop caused by embedded html file
 284                     // see MDL-9825
 285                     break;
 286                                 }
 287                         }
 288                 }
 289         }
 290
 291 };
 292
 293 if (typeof window.attachEvent != "undefined" && UFO.uaHas("ieWin")) {
 294         window.attachEvent("onunload", UFO.cleanupIELeaks);
 295 }