Add touch event support for mobile devices so they can access the menus (still need to work on Firefox support, but works for WebKit-based mobiles)

jax/output/HTML-CSS/config.js

@@ -12,5 +12,5 @@
  *      http://www.apache.org/licenses/LICENSE-2.0
  */
 
-MathJax.OutputJax["HTML-CSS"]=MathJax.OutputJax({id:"HTML-CSS",version:"1.1.5",directory:MathJax.OutputJax.directory+"/HTML-CSS",extensionDir:MathJax.OutputJax.extensionDir+"/HTML-CSS",autoloadDir:MathJax.OutputJax.directory+"/HTML-CSS/autoload",fontDir:MathJax.OutputJax.directory+"/HTML-CSS/fonts",webfontDir:MathJax.OutputJax.fontDir+"/HTML-CSS",config:{scale:100,minScaleAdjust:50,availableFonts:["STIX","TeX"],preferredFont:"TeX",webFont:"TeX",imageFont:"TeX",undefinedFamily:"STIXGeneral,'Arial Unicode MS',serif",showMathMenu:true,styles:{".MathJax_Display":{"text-align":"center",margin:"1em 0em"},".MathJax .merror":{"background-color":"#FFFF88",color:"#CC0000",border:"1px solid #CC0000",padding:"1px 3px","font-family":"serif","font-style":"normal","font-size":"90%"},".MathJax_Preview":{color:"#888888"},"#MathJax_Tooltip":{"background-color":"InfoBackground",color:"InfoText",border:"1px solid black","box-shadow":"2px 2px 5px #AAAAAA","-webkit-box-shadow":"2px 2px 5px #AAAAAA","-moz-box-shadow":"2px 2px 5px #AAAAAA","-khtml-box-shadow":"2px 2px 5px #AAAAAA",filter:"progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color='gray', Positive='true')",padding:"3px 4px"}}}});if(MathJax.Hub.Browser.isMSIE&&document.documentMode>=9){delete MathJax.OutputJax["HTML-CSS"].config.styles["#MathJax_Tooltip"].filter}if(!MathJax.Hub.config.delayJaxRegistration){MathJax.OutputJax["HTML-CSS"].Register("jax/mml")}MathJax.Hub.Register.StartupHook("End Config",[function(b,c){var a=b.Insert({minBrowserVersion:{Firefox:3,Opera:9.52,MSIE:6,Chrome:0.3,Safari:2,Konqueror:4},inlineMathDelimiters:["$","$"],displayMathDelimiters:["$$","$$"],multilineDisplay:true,minBrowserTranslate:function(f){var e=b.getJaxFor(f),k=["[Math]"],j;var h=document.createElement("span",{className:"MathJax_Preview"});if(e.inputJax.id==="TeX"){if(e.root.Get("displaystyle")){j=a.displayMathDelimiters;k=[j[0]+e.originalText+j[1]];if(a.multilineDisplay){k=k[0].split(/\n/)}}else{j=a.inlineMathDelimiters;k=[j[0]+e.originalText.replace(/^\s+/,"").replace(/\s+$/,"")+j[1]]}}for(var g=0,d=k.length;g<d;g++){h.appendChild(document.createTextNode(k[g]));if(g<d-1){h.appendChild(document.createElement("br"))}}f.parentNode.insertBefore(h,f)}},(b.config["HTML-CSS"]||{}));if(b.Browser.version!=="0.0"&&!b.Browser.versionAtLeast(a.minBrowserVersion[b.Browser]||0)){c.Translate=a.minBrowserTranslate;b.Config({showProcessingMessages:false});MathJax.Message.Set("Your browser does not support MathJax",null,4000);b.Startup.signal.Post("MathJax not supported")}},MathJax.Hub,MathJax.OutputJax["HTML-CSS"]]);MathJax.OutputJax["HTML-CSS"].loadComplete("config.js");
+MathJax.OutputJax["HTML-CSS"]=MathJax.OutputJax({id:"HTML-CSS",version:"1.1.6",directory:MathJax.OutputJax.directory+"/HTML-CSS",extensionDir:MathJax.OutputJax.extensionDir+"/HTML-CSS",autoloadDir:MathJax.OutputJax.directory+"/HTML-CSS/autoload",fontDir:MathJax.OutputJax.directory+"/HTML-CSS/fonts",webfontDir:MathJax.OutputJax.fontDir+"/HTML-CSS",config:{scale:100,minScaleAdjust:50,availableFonts:["STIX","TeX"],preferredFont:"TeX",webFont:"TeX",imageFont:"TeX",undefinedFamily:"STIXGeneral,'Arial Unicode MS',serif",showMathMenu:true,styles:{".MathJax_Display":{"text-align":"center",margin:"1em 0em"},".MathJax .merror":{"background-color":"#FFFF88",color:"#CC0000",border:"1px solid #CC0000",padding:"1px 3px","font-family":"serif","font-style":"normal","font-size":"90%"},".MathJax_Preview":{color:"#888888"},"#MathJax_Tooltip":{"background-color":"InfoBackground",color:"InfoText",border:"1px solid black","box-shadow":"2px 2px 5px #AAAAAA","-webkit-box-shadow":"2px 2px 5px #AAAAAA","-moz-box-shadow":"2px 2px 5px #AAAAAA","-khtml-box-shadow":"2px 2px 5px #AAAAAA",filter:"progid:DXImageTransform.Microsoft.dropshadow(OffX=2, OffY=2, Color='gray', Positive='true')",padding:"3px 4px"}}}});if(MathJax.Hub.Browser.isMSIE&&document.documentMode>=9){delete MathJax.OutputJax["HTML-CSS"].config.styles["#MathJax_Tooltip"].filter}if(!MathJax.Hub.config.delayJaxRegistration){MathJax.OutputJax["HTML-CSS"].Register("jax/mml")}MathJax.Hub.Register.StartupHook("End Config",[function(b,c){var a=b.Insert({minBrowserVersion:{Firefox:3,Opera:9.52,MSIE:6,Chrome:0.3,Safari:2,Konqueror:4},inlineMathDelimiters:["$","$"],displayMathDelimiters:["$$","$$"],multilineDisplay:true,minBrowserTranslate:function(f){var e=b.getJaxFor(f),k=["[Math]"],j;var h=document.createElement("span",{className:"MathJax_Preview"});if(e.inputJax.id==="TeX"){if(e.root.Get("displaystyle")){j=a.displayMathDelimiters;k=[j[0]+e.originalText+j[1]];if(a.multilineDisplay){k=k[0].split(/\n/)}}else{j=a.inlineMathDelimiters;k=[j[0]+e.originalText.replace(/^\s+/,"").replace(/\s+$/,"")+j[1]]}}for(var g=0,d=k.length;g<d;g++){h.appendChild(document.createTextNode(k[g]));if(g<d-1){h.appendChild(document.createElement("br"))}}f.parentNode.insertBefore(h,f)}},(b.config["HTML-CSS"]||{}));if(b.Browser.version!=="0.0"&&!b.Browser.versionAtLeast(a.minBrowserVersion[b.Browser]||0)){c.Translate=a.minBrowserTranslate;b.Config({showProcessingMessages:false});MathJax.Message.Set("Your browser does not support MathJax",null,4000);b.Startup.signal.Post("MathJax not supported")}},MathJax.Hub,MathJax.OutputJax["HTML-CSS"]]);MathJax.OutputJax["HTML-CSS"].loadComplete("config.js");
 

unpacked/MathJax.js

@@ -30,7 +30,7 @@ if (!window.MathJax) {window.MathJax= {}}
 if (!MathJax.Hub) {  // skip if already loaded
   
 MathJax.version = "1.1a";
-MathJax.fileversion = "1.1.7";
+MathJax.fileversion = "1.1.8";
 
 /**********************************************************/
 
@@ -2050,6 +2050,8 @@ MathJax.Hub.Startup = {
       else if (v >  500) {browser.version = "3.0"}
       else if (v >  400) {browser.version = "2.0"}
       else if (v >   85) {browser.version = "1.0"}
+      browser.isMobile = (navigator.appVersion.match(/Mobile/i) != null);
+      browser.noContextMenu = browser.isMobile;
     },
     Firefox: function (browser) {
       if (browser.version === "0.0" && navigator.product === "Gecko" && navigator.productSub) {
@@ -2058,6 +2060,8 @@ MathJax.Hub.Startup = {
         else if (date >= "20080617") {browser.version = "3.0"}
         else if (date >= "20061024") {browser.version = "2.0"}
       }
+      browser.isMobile = (navigator.appVersion.match(/Android/i) != null ||
+                          navigator.userAgent.match(/ Fennec\//) != null);
     },
     Opera: function (browser) {browser.version = opera.version()},
     MSIE: function (browser) {

unpacked/extensions/MathMenu.js

@@ -24,7 +24,7 @@
  */
 
 (function (HUB,HTML,AJAX) {
-  var VERSION = "1.1.4";
+  var VERSION = "1.1.5";
   
   MathJax.Extension.MathMenu = {version: VERSION};
 
@@ -170,7 +170,11 @@
       if (!event) {event = window.event};
       var title = (!this.title ? null : [["div",{className: "MathJax_MenuTitle"},[this.title]]]);
       var div = document.getElementById("MathJax_MenuFrame");
-      if (!div) {div = MENU.Background(this)}
+      if (!div) {
+        div = MENU.Background(this);
+        delete ITEM.lastItem; delete ITEM.lastMenu;
+        delete MENU.skipUp;
+      }
       var menu = HTML.addElement(div,"div",{
         onmouseup: MENU.Mouseup, ondblclick: this.False,
         ondragstart: this.False, onselectstart: this.False, oncontextmenu: this.False,
@@ -189,15 +193,16 @@
       if (!parent) {
         if (x + menu.offsetWidth > document.body.offsetWidth - this.margin)
            {x = document.body.offsetWidth - menu.offsetWidth - this.margin}
+        if (MENU.isMobile) {x -= menu.offsetWidth / 2; y -= 20}
         MENU.skipUp = true;
       } else {
         var side = "left", mw = parent.offsetWidth;
-        x = parent.offsetWidth - 2; y = 0;
+        x = (MENU.isMobile ? 30 : mw - 2); y = 0;
         while (parent && parent !== div) {
           x += parent.offsetLeft; y += parent.offsetTop;
           parent = parent.parentNode;
         }
-        if (x + menu.offsetWidth > document.body.offsetWidth - this.margin)
+        if (x + menu.offsetWidth > document.body.offsetWidth - this.margin && !MENU.isMobile)
           {side = "right"; x = Math.max(this.margin,x - mw - menu.offsetWidth + 6)}
         if (!isPC) {
           // in case these ever get implemented
@@ -228,22 +233,46 @@
       if (MENU.skipUp) {delete MENU.skipUp} else {this.Remove(event,menu)}
     },
 
-    False: FALSE
+    False: FALSE,
+    
+    /*
+     *  Find a named item in a menu (or submenu).
+     *  A lsit of names means descend into submenus.
+     */
+    Find: function (name) {
+      var names = [].slice.call(arguments,1);
+      for (var i = 0, m = this.items.length; i < m; i++) {
+        if (this.items[i].name === name) {
+          if (names.length) {
+            if (!this.items[i].menu) {return null}
+            return this.items[i].menu.Find.apply(this.items[i].menu,names);
+          }
+          return this.items[i];
+        }
+      }
+      return null;
+    }
+    
   },{
+    
     config: CONFIG,
 
     div: null,     // the DOM elements for the menu and submenus
 
-    Remove:    function (event) {MENU.Event(event,this,"Remove")},
+    Remove:     function (event) {return MENU.Event(event,this,"Remove")},
-    Mouseover: function (event) {MENU.Event(event,this,"Mouseover")},
+    Mouseover:  function (event) {return MENU.Event(event,this,"Mouseover")},
-    Mouseout:  function (event) {MENU.Event(event,this,"Mouseout")},
+    Mouseout:   function (event) {return MENU.Event(event,this,"Mouseout")},
-    Mousedown: function (event) {MENU.Event(event,this,"Mousedown")},
+    Mousedown:  function (event) {return MENU.Event(event,this,"Mousedown")},
-    Mouseup:   function (event) {MENU.Event(event,this,"Mouseup")},
+    Mouseup:    function (event) {return MENU.Event(event,this,"Mouseup")},
-    Mousemove: function (event) {MENU.Event(event,this,"Mousemove")},
+    Touchstart: function (event) {return MENU.Event(event,this,"Touchstart")},
+    Touchend:   function (event) {return MENU.Event(event,this,"Touchend")},
     Event: function (event,menu,type) {
       if (!event) {event = window.event}
       var item = menu.menuItem;
+//debug(type+" "+(item||{}).name);
+//try {
       if (item && item[type]) {return item[type](event,menu)}
+//} catch (err) {debug(err.message)}
       return null;
     },
 
@@ -300,8 +329,9 @@
       if (!this.hidden) {
         var def = {
           onmouseover: MENU.Mouseover, onmouseout: MENU.Mouseout,
-          onmouseup: MENU.Mouseup, onmousedown: this.False,
+          onmouseup: MENU.Mouseup, onmousedown: MENU.Mousedown,
           ondragstart: this.False, onselectstart: this.False, onselectend: this.False,
+          ontouchstart: MENU.Touchstart, ontouchend: MENU.Touchend,
           className: "MathJax_MenuItem", menuItem: this
         };
         if (this.disabled) {def.className += " MathJax_MenuDisabled"}
@@ -333,6 +363,19 @@
     },
     Mouseup: function (event,menu) {return this.Remove(event,menu)},
     
+    Touchstart: function (event,menu) {return this.TouchEvent(event,menu,"Mousedown")},
+    Touchend: function (event,menu)   {return this.TouchEvent(event,menu,"Mouseup")},
+    TouchEvent: function (event,menu,type) {
+      if (this !== ITEM.lastItem) {
+        if (ITEM.lastMenu) {MENU.Event(event,ITEM.lastMenu,"Mouseout")}
+        MENU.Event(event,menu,"Mouseover");
+        ITEM.lastItem = this; ITEM.lastMenu = menu;
+      }
+      if (this.nativeTouch) {return null}
+      MENU.Event(event,menu,type);
+      return false;
+    },
+    
     Remove: function (event,menu) {
       menu = menu.parentNode.menuItem;
       return menu.Remove(event,menu);
@@ -356,9 +399,10 @@
       this.name = name; this.action = action;
       this.With(def);
     },
+    
     Label: function (def,menu) {return [this.name]},
     Mouseup: function (event,menu) {
-      if (!this.disabled) {this.Remove(event,menu); this.action.call(this,event)}
+      if (!this.disabled) {this.Remove(event,menu); this.action.call(this,event);}
       return this.False(event);
     }
   });
@@ -377,7 +421,7 @@
       this.menu = MENU.apply(MENU,[].slice.call(arguments,i));
     },
     Label: function (def,menu) {
-      def.onmousemove = MENU.Mousemove; this.menu.posted = false;
+      this.menu.posted = false;
       return [this.name+" ",["span",{className:"MathJax_MenuArrow"},[this.marker]]];
     },
     Timer: function (event,menu) {
@@ -385,6 +429,20 @@
       event = {clientX: event.clientX, clientY: event.clientY}; // MSIE can't pass the event below
       this.timer = setTimeout(MathJax.Callback(["Mouseup",this,event,menu]),CONFIG.delay);
     },
+    Touchstart: function (event,menu) {
+      this.skipUp = !this.menu.posted;
+      return this.SUPER(arguments).Touchstart.apply(this,arguments);
+    },
+    Touchend: function (event,menu) {
+      var result = false;
+      if (!this.skipUp) {
+        var forceout = this.menu.posted;
+        result = this.SUPER(arguments).Touchend.apply(this,arguments);
+        if (forceout) {this.Deactivate(menu); delete ITEM.lastItem; delete ITEM.lastMenu}
+      }
+      delete this.skipUp;
+      return result;
+    },
     Mouseup: function (event,menu) {
       if (!this.disabled) {
         if (!this.menu.posted) {
@@ -599,19 +657,29 @@
     var w = MENU.ShowSource.Window(event);
     text = text.replace(/^\s*/,"").replace(/\s*$/,"");
     text = text.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;");
-    w.document.open();
+    if (MENU.isMobile) {
-    w.document.write("<html><head><title>MathJax Equation Source</title></head><body style='font-size:85%'>");
+      w.document.open();
-    w.document.write("<table><tr><td><pre>"+text+"</pre></td></tr></table>");
+      w.document.write("<html><head><meta name='viewport' content='width=device-width, initial-scale=1.0' /><title>MathJax Equation Source</title></head><body style='font-size:85%'>");
-    w.document.write("</body></html>"); w.document.close();
+      w.document.write("<pre>"+text+"</pre>");
-    var table = w.document.body.firstChild;
+      w.document.write("<hr><input type='button' value='Close' onclick='window.close()' />");
-    var H = (w.outerHeight-w.innerHeight)||30, W = (w.outerWidth-w.innerWidth)||30;
+      w.document.write("</body></html>");
-    W = Math.min(Math.floor(.5*screen.width),table.offsetWidth+W+25);
+      w.document.close();
-    H = Math.min(Math.floor(.5*screen.height),table.offsetHeight+H+25);
+    } else {
-    w.resizeTo(W,H);
+      w.document.open();
-    if (event && event.screenX != null) {
+      w.document.write("<html><head><title>MathJax Equation Source</title></head><body style='font-size:85%'>");
-      var x = Math.max(0,Math.min(event.screenX-Math.floor(W/2), screen.width-W-20)),
+      w.document.write("<table><tr><td><pre>"+text+"</pre></td></tr></table>");
-          y = Math.max(0,Math.min(event.screenY-Math.floor(H/2), screen.height-H-20));
+      w.document.write("</body></html>");
-      w.moveTo(x,y);
+      w.document.close();
+      var table = w.document.body.firstChild;
+      var H = (w.outerHeight-w.innerHeight)||30, W = (w.outerWidth-w.innerWidth)||30;
+      W = Math.min(Math.floor(.5*screen.width),table.offsetWidth+W+25);
+      H = Math.min(Math.floor(.5*screen.height),table.offsetHeight+H+25);
+      w.resizeTo(W,H);
+      if (event && event.screenX != null) {
+        var x = Math.max(0,Math.min(event.screenX-Math.floor(W/2), screen.width-W-20)),
+            y = Math.max(0,Math.min(event.screenY-Math.floor(H/2), screen.height-H-20));
+        w.moveTo(x,y);
+      }
     }
     delete MENU.ShowSource.w;
   };
@@ -691,6 +759,8 @@
       }
     }
   });
+  MENU.isMobile = MathJax.Hub.Browser.isMobile;
+  MENU.noContextMenu = MathJax.Hub.Browser.noContextMenu;
 
   /*************************************************************/
 
@@ -713,7 +783,7 @@
      *  The main menu
      */
     MENU.menu = MENU(
-      ITEM.COMMAND("Show Source",MENU.ShowSource),
+      ITEM.COMMAND("Show Source",MENU.ShowSource,{nativeTouch: true}),
       ITEM.SUBMENU("Format",
         ITEM.RADIO("MathML",   "format"),
         ITEM.RADIO("Original", "format", {value: "Original"})
@@ -772,17 +842,31 @@
 
   MENU.showRenderer = function (show) {
     MENU.cookie.showRenderer = CONFIG.showRenderer = show; MENU.saveCookie();
-    MENU.menu.items[3].menu.item[3].hidden = !show;
+    MENU.menu.Find("Settings","Math Renderer").hidden = !show;
   };
   MENU.showFontMenu = function (show) {
     MENU.cookie.showFontMenu = CONFIG.showFontMenu = show; MENU.saveCookie();
-    MENU.menu.items[3].menu.items[4].hidden = !show
+    MENU.menu.Find("Settings","Font Preference").hidden = !show;
   };
   MENU.showContext = function (show) {
     MENU.cookie.showContext = CONFIG.showContext = show; MENU.saveCookie();
-    MENU.menu.items[3].menu.items[5].hidden = !show
+    MENU.menu.Find("Settings","Contextual Menu").hidden = !show;
   };
   
+  if (MENU.isMobile) {
+    (function () {
+      var settings = MathJax.Hub.config.menuSettings;
+      var trigger = MENU.menu.Find("Settings","Zoom Trigger").menu;
+      trigger.items[0].disabled = trigger.items[1].disabled = true;
+      if (settings.zoom === "Hover" || settings.zoom == "Click") {settings.zoom = "None"}
+      trigger.items = trigger.items.slice(0,4);
+    
+      if (navigator.appVersion.match(/ Android /)) {
+        MathJax.Menu.ITEM.SUBMENU.Augment({marker: "\u00BB"});
+      }
+    })();
+  }
+
   /*************************************************************/
 
   MathJax.Callback.Queue(

unpacked/jax/output/HTML-CSS/config.js

@@ -24,7 +24,7 @@
 
 MathJax.OutputJax["HTML-CSS"] = MathJax.OutputJax({
   id: "HTML-CSS",
-  version: "1.1.5",
+  version: "1.1.6",
   directory: MathJax.OutputJax.directory + "/HTML-CSS",
   extensionDir: MathJax.OutputJax.extensionDir + "/HTML-CSS",
   autoloadDir: MathJax.OutputJax.directory + "/HTML-CSS/autoload",

unpacked/jax/output/HTML-CSS/jax.js

@@ -182,6 +182,57 @@
     }
   });
   
+  //
+  //  Handle touch events.  
+  //
+  //  Use double-tap and hold as a replacement for context menu event.
+  //  Use double-tap as a replacement for double click.
+  //
+  var TOUCH = {
+    last: 0,          // time of last tap event
+    delay: 500,       // delay time for double-click
+
+    //
+    //  Check if this is a double-tap, and if so, start the timer
+    //  for the double-tap and hold (to trigger the contextual menu)
+    //
+    start: function (event) {
+      var now = new Date().getTime();
+      var dblTap = (now - TOUCH.last < TOUCH.delay);
+      TOUCH.last = now;
+      if (dblTap) {
+        TOUCH.timeout = setTimeout(TOUCH.menu,TOUCH.delay,this,event);
+        event.preventDefault();
+      }
+    },
+          
+    //
+    //  Check if there is a timeout pending, i.e., we have a 
+    //  double-tap and were waiting to see if it is held long
+    //  enough for the menu.  Since we got the end before the
+    //  timeout, it is a double-click, not a double-tap-and-hold.
+    //  Prevent the default action and issue a double click.
+    //
+    end: function (event) {
+      if (TOUCH.timeout) {
+        clearTimeout(TOUCH.timeout);
+        delete TOUCH.timeout; TOUCH.last = 0;
+        event.preventDefault();
+        HTMLCSS.DblClick.call(this,event.touches[0]||event.touch);
+      }
+    },
+        
+    //
+    //  If the timeout passes without an end event, we issue
+    //  the contextual menu event.
+    //
+    menu: function (math,event) {
+      delete TOUCH.timeout; TOUCH.last = 0;
+      HTMLCSS.ContextMenu.call(math,event.touches[0]||even.touch);
+    }
+  };
+
+
   HTMLCSS.Augment({
     config: {
       styles: {
@@ -261,6 +312,7 @@
     LEFTBUTTON: (HUB.Browser.isMSIE ? 1 : 0),  // the event.button value for left button
     MENUKEY: "altKey",                         // the event value for alternate context menu
 
+    Touch: TOUCH, // Touch event handling
     Font: null,  // created by Config() below
 
     Config: function () {
@@ -385,6 +437,10 @@
         className:"MathJax", oncontextmenu:this.ContextMenu, onmousedown: this.Mousedown,
         onmouseover:this.Mouseover, onclick:this.Click, ondblclick:this.DblClick
       });
+      if (MathJax.Hub.Browser.noContextMenu) {
+        span.ontouchstart = this.Touch.start;
+        span.ontouchend = this.Touch.end;
+      }
       var blockMode = (math.Get("display") === "block");
       if (blockMode) {
         div = frame = this.Element("div",{className:"MathJax_Display", style:{width:"100%", position:"relative"}});
@@ -434,7 +490,6 @@
               [this,arguments.callee,EVENT,force]  // call this function again
             );
           }
-          if (!event) {event = window.event}
           if (event.preventDefault) {event.preventDefault()}
           if (event.stopPropagation) {event.stopPropagation()}
           event.cancelBubble = true;
@@ -2210,7 +2265,6 @@
       Safari: function (browser) {
         var v3p0 = browser.versionAtLeast("3.0");
         var v3p1 = browser.versionAtLeast("3.1");
-        browser.isMobile = (navigator.appVersion.match(/Mobile/i) != null);
         var android = (navigator.appVersion.match(/ Android (\d+)\.(\d+)/));
         var forceImages = (v3p1 && browser.isMobile && (
           (navigator.platform.match(/iPad|iPod|iPhone/) && !browser.versionAtLeast("5.0")) ||

unpacked/jax/output/NativeMML/jax.js

@@ -215,7 +215,6 @@
               [this,arguments.callee,EVENT,force]  // call this function again
             );
           }
-          if (!event) {event = window.event}
           if (event.preventDefault) {event.preventDefault()}
           if (event.stopPropagation) {event.stopPropagation()}
           event.cancelBubble = true;