Merge pull request #379 from mathjax/issue378

Use new None output for mml-only output

Author: dpvc

lib/main.js

@@ -115,8 +115,8 @@ var CHTMLSTYLES;         // filled in when CommonHTML is loaded
 //    the jax to be loaded completely)
 //
 function GetWindow() {
-var virtualConsole = new jsdom.VirtualConsole();
-virtualConsole.sendTo(console);
+  var virtualConsole = new jsdom.VirtualConsole();
+  virtualConsole.sendTo(console);
   window = new JSDOM('',{
     virtualConsole: virtualConsole,
     userAgent: "Node.js",
@@ -141,7 +141,6 @@ function ConfigureMathJax() {
     //
     //  Load all input jax and preprocessors
     //  Load AMS extensions and the autoload extension for TeX
-    //  Allow $...$ delimiters and don't create previews for any preprocessor,
     //  Create stand-alone SVG elements with font caches by default
     //    (users can override that)
     //
@@ -478,6 +477,18 @@ function ConfigureMathJax() {
 
       });
 
+      //
+      //  Set up None output jax (for when only MathML output is needed)
+      //
+      MathJax.OutputJax.None = MathJax.OutputJax({
+        id: "None",
+        preTranslate: function () {},
+        Translate: function () {},
+        postTranslate: function () {}
+      });
+      MathJax.OutputJax.None.loadComplete("jax.js");
+      MathJax.OutputJax.None.Register("jax/mml");
+
       //
       //  Reset the color extension after `autoload-all`
       //
@@ -497,14 +508,14 @@ function ConfigureMathJax() {
       //    (reseting the counters so that the initial math doesn't affect them)
       //
       MathJax.Hub.Register.StartupHook("End",function () {
-        MathJax.OutputJax.SVG.resetGlyphs(true);
+        if (MathJax.OutputJax.SVG.resetGlyphs) MathJax.OutputJax.SVG.resetGlyphs(true);
         MathJax.ElementJax.mml.ID = 0;
         serverState = STATE.READY;
         MathJax.Hub.Queue(StartQueue);
       });
     }
   };
-
+  
   if (extensions) {
     //
     // Parse added extensions list and add to standard ones
@@ -592,7 +603,7 @@ function AddError(message,nopush) {
 function GetMML(result) {
   if (!data.mml && !data.mmlNode) return;
   var jax = MathJax.Hub.getAllJax()[0];
-  if (data.speakText && !jax.root.alttext){
+  if (data.speakText && !jax.root.alttext) {
     jax.root.alttext = result.speakText;
     var attrNames = jax.root.attrNames;
     if (attrNames && attrNames.indexOf("alttext") === -1) {
@@ -749,7 +760,13 @@ function StartQueue() {
   //
   GetState(data.state);
 
-  var renderer = ( (data.html || data.htmlNode || data.css) ? "CommonHTML" : "SVG");
+  //
+  // Get the renderer to use
+  //
+  var renderer = (
+      (data.html || data.htmlNode || data.css) ? "CommonHTML" :
+          (data.svg || data.svgNode) ? "SVG" : "None"
+  );
 
   //
   //  Set up a timeout timer to restart MathJax if it runs too long,
@@ -780,7 +797,7 @@ function GetState(state) {
       MML = MathJax.ElementJax.mml,
       AMS = MathJax.Extension["TeX/AMSmath"],
       HUB = MathJax.Hub, HTML = MathJax.HTML,
-      GLYPH = SVG.BBOX.GLYPH;
+      GLYPH = (SVG.BBOX||{}).GLYPH;
 
   if (state && state.AMS) {
     AMS.startNumber = state.AMS.startNumber;
@@ -793,7 +810,7 @@ function GetState(state) {
     ID = state.ID;
   } else {
     if (state) {state.AMS = {}}
-    SVG.resetGlyphs(true);
+    if (SVG.resetGlyphs) SVG.resetGlyphs(true);
     if (data.useGlobalCache) {
       state.glyphs = {};
       state.defs = HTML.Element("defs");
@@ -826,7 +843,7 @@ function ReturnResult(result) {
   var state = data.state;
   if (state) {
     var AMS = MathJax.Extension["TeX/AMSmath"];
-    var GLYPH = MathJax.OutputJax.SVG.BBOX.GLYPH;
+    var GLYPH = (MathJax.OutputJax.SVG||{}).BBOX.GLYPH;
     state.AMS.startNumber = AMS.startNumber;
     state.AMS.labels = AMS.labels;
     state.AMS.IDs = AMS.IDs;