Fix inTabOrder menu action, change default, and factor out code for setting/unsetting the tab index (in case the page author wants to call it.

Author: dpvc

unpacked/MathJax.js

@@ -1896,7 +1896,7 @@ MathJax.Hub = {
       mpContext: false,    //  true means pass menu events to MathPlayer in IE
       mpMouse: false,      //  true means pass mouse events to MathPlayer in IE
       texHints: true,      //  include class names for TeXAtom elements
-      inTabOrder: false,    // set to false if math elements should be included in the tabindex
+      inTabOrder: true,    //  set to false if math elements should be included in the tabindex
       semantics: false     //  add semantics tag with original form in MathML output
     },
 

unpacked/extensions/MathMenu.js

@@ -544,26 +544,12 @@
       MENU.FocusNode(menu);
     },
     Activate: function(event, menu) {
-      var jaxs = MENU.AllNodes();
-      for (var j = 0, jax; jax = jaxs[j]; j++) {
-        if (jax.tabIndex > 0) {
-          jax.oldTabIndex = jax.tabIndex;
-        }
-        jax.tabIndex = -1;
-      }
+      MENU.UnsetTabIndex();
       MENU.posted = true;
     },
     Unfocus: function() {
       MENU.ActiveNode().tabIndex = -1;
-      var jaxs = MENU.AllNodes();
-      for (var j = 0, jax; jax = jaxs[j]; j++) {
-        if (jax.oldTabIndex !== undefined) {
-          jax.tabIndex = jax.oldTabIndex
-          delete jax.oldTabIndex;
-        } else {
-          jax.tabIndex = HUB.getTabOrder();
-        }
-      }
+      MENU.SetTabIndex();
       MENU.FocusNode(MENU.CurrentNode());
       MENU.posted = false;
     },
@@ -585,6 +571,26 @@
     Left: function(event, menu) {
       MENU.MoveHorizontal(event, menu, function(x) {return x - 1;});
     },
+    UnsetTabIndex: function () {
+      var jaxs = MENU.AllNodes();
+      for (var j = 0, jax; jax = jaxs[j]; j++) {
+        if (jax.tabIndex > 0) {
+          jax.oldTabIndex = jax.tabIndex;
+        }
+        jax.tabIndex = -1;
+      }
+    },
+    SetTabIndex: function () {
+      var jaxs = MENU.AllNodes();
+      for (var j = 0, jax; jax = jaxs[j]; j++) {
+        if (jax.oldTabIndex !== undefined) {
+          jax.tabIndex = jax.oldTabIndex
+          delete jax.oldTabIndex;
+        } else {
+          jax.tabIndex = HUB.getTabOrder();
+        }
+      }
+    },
 
     //TODO: Move to utility class.
     // Computes a mod n.
@@ -1336,6 +1342,9 @@
     }
   };
 
+  /*
+   *  Toggle assistive MML settings
+   */
   MENU.AssistiveMML = function (item,restart) {
     var AMML = MathJax.Extension.AssistiveMML;
     if (!AMML) {
@@ -1543,7 +1552,7 @@
           ITEM.RULE(),
           ITEM.CHECKBOX("Fast Preview", "FastPreview"),
           ITEM.CHECKBOX("Assistive MathML", "assistiveMML", {action:MENU.AssistiveMML}),
-          ITEM.CHECKBOX("Include in Tab Order", "inTabOrder", {action:CONFIG.inTabOrder})
+          ITEM.CHECKBOX("Include in Tab Order", "inTabOrder")
         ),
         ITEM.SUBMENU("MathPlayer",  {hidden:!HUB.Browser.isMSIE || !CONFIG.showMathPlayer,
                                                     disabled:!HUB.Browser.hasMathPlayer},