Better handling of MathPlayer settings. In particular, allow Alt-Click in IE8 and lower when math menu is disabled.

unpacked/extensions/MathEvents.js

@@ -175,7 +175,8 @@
       var JAX = OUTPUT[math.jaxID];
       var show = (JAX.config.showMathMenu != null ? JAX : HUB).config.showMathMenu;
       if (show) {
-        if (SETTINGS.context === "MathJax" && !SETTINGS.mpContext) {
+        show = (JAX.config.showMathMenuMSIE != null ? JAX : HUB).config.showMathMenuMSIE;
+        if (SETTINGS.context === "MathJax" && !SETTINGS.mpContext && show) {
           if (!ME.noContextMenuBug || event.button !== EVENT.RIGHTBUTTON) return;
         } else {
           if (!event[EVENT.MENUKEY] || event.button !== EVENT.LEFTBUTTON) return;

unpacked/extensions/MathMenu.js

@@ -33,7 +33,7 @@
     signal: SIGNAL
   };
 
-  var isPC = HUB.Browser.isPC, isMSIE = HUB.Browser.isMSIE;
+  var isPC = HUB.Browser.isPC, isMSIE = HUB.Browser.isMSIE, isIE9 = ((document.documentMode||0) > 8);
   var ROUND = (isPC ? null : "5px");
   
   var CONFIG = HUB.CombineConfig("MathMenu",{
@@ -681,7 +681,7 @@
         return;
       }
     } else {
-      if (MENU.jax.originalText == null) {alert("No TeX form available"); return}
+      if (MENU.jax.originalText == null) {alert("No original form available"); return}
       MENU.ShowSource.Text(MENU.jax.originalText,event);
     }
   };
@@ -779,23 +779,23 @@
    */
   MENU.MPEvents = function (item) {
     var discoverable = CONFIG.settings.discoverable;
-    if ((document.documentMode||0) < 9) {
-      if (!confirm("This will disable the MathJax menu and MathJax Zoom features, " +
-                   "and you will have to delete the cookies for this site to " +
-                   "reactivate them.\n\n" +
-                   "Really change the MathPlayer settings?")) {
+    if (!isIE9) {
+      if (CONFIG.settings.mpMouse && !confirm(
+          "This will disable the MathJax menu and zoom features, " +
+          "but you can Alt-Click on an expression to obtain the MathJax " +
+          "menu instead.\n\nReally change the MathPlayer settings?")) {
         delete MENU.cookie.mpContext; delete CONFIG.settings.mpContext;
         delete MENU.cookie.mpMouse; delete CONFIG.settings.mpMouse;
         MENU.saveCookie();
         return;
       }
-      CONFIG.settings.mpContext = CONFIG.settings.mpMouse = true;
-      MENU.cookie.mpContext = MENU.cookie.mpMouse = true;
+      CONFIG.settings.mpContext = CONFIG.settings.mpMouse;
+      MENU.cookie.mpContext = MENU.cookie.mpMouse = CONFIG.settings.mpMouse;
       MENU.saveCookie();
       MathJax.Hub.Queue(["Rerender",MathJax.Hub])
     } else if (!discoverable && item.name === "Menu Events" && CONFIG.settings.mpContext) {
-      alert("The MathJax contextual menu will be disabled; instead " +
-            "Alt-Click on an expression to obtain the MathJax menu.");
+      alert("The MathJax contextual menu will be disabled, but you can " +
+            "Alt-Click on an expression to obtain the MathJax menu instead.");
     }
   };
 
@@ -812,7 +812,7 @@
         msieFixedPositionBug: (quirks || !isIE8),
         msieAboutBug: quirks
       });
-      if (document.documentMode >= 9) {
+      if (isIE9) {
         delete CONFIG.styles["#MathJax_About"].filter;
         delete CONFIG.styles[".MathJax_Menu"].filter;
       }
@@ -882,8 +882,9 @@
                                                       !CONFIG.showMathPlayer,
                                                disabled:!HUB.Browser.hasMathPlayer},
           ITEM.LABEL("Let MathPlayer Handle:"),
-          ITEM.CHECKBOX("Menu Events",    "mpContext", {action: MENU.MPEvents}),
-          ITEM.CHECKBOX("Mouse Events",   "mpMouse",   {action: MENU.MPEvents})
+          ITEM.CHECKBOX("Menu Events",    "mpContext", {action: MENU.MPEvents, hidden:!isIE9}),
+          ITEM.CHECKBOX("Mouse Events",   "mpMouse",   {action: MENU.MPEvents, hidden:!isIE9}),
+          ITEM.CHECKBOX("Mouse and Menu Events", "mpMouse", {action: MENU.MPEvents, hidden:isIE9})
         ),
         ITEM.SUBMENU("Font Preference",       {hidden:!CONFIG.showFontMenu},
           ITEM.LABEL("For HTML-CSS:"),

unpacked/jax/output/NativeMML/jax.js

@@ -222,7 +222,8 @@
         } else {
           var config = (this.config.showMathMenuMSIE != null ? this : HUB).config;
           if (config.showMathMenuMSIE && !this.settings.mpContext && !this.settings.mpMouse)
-                {this.MSIEoverlay(container)} else {container.style.position = ""}
+                {this.MSIEoverlay(container)} else
+                {container.style.position = ""; mspan.firstChild.onmousedown = this.MSIEaltMenu}
         }
       } else {
         container.oncontextmenu = EVENT.Menu;
@@ -296,10 +297,16 @@
       if (event.srcElement.className === "MathJax_MathPlayer_Overlay" && this.msieMath.fireEvent) {
         // for now, ignore all other events.  This will disable MathPlayer's zoom
         // feature, but also its <maction> support.
-        if (type === "ContextMenu") {this.msieMath.fireEvent("on"+event.type,event)}
+        if (type === "ContextMenu" || type === "Mouseover" || type === "Mouseout")
+          {this.msieMath.fireEvent("on"+event.type,event)}
       }
       return EVENT.False(event);
     },
+    MSIEaltMenu: function () {
+      var container = this.parentNode.parentNode;
+      while (!container.jaxID) {container = container.parentNode}
+      EVENT.AltContextMenu(window.event,container);
+    },
 
     MSIE9events: {
       contextmenu:"Menu", click:"Click", dblclick: "DblClick",