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commit 7cb05e2e2092b6d3b2a5830596ed6a672c95d682
parent 9f80a1ebab2e5cf4d8db5d390320f387486c5767
Author: Davide P. Cervone <dpvc@union.edu>
Date:   Tue, 25 Oct 2011 14:51:43 -0400

Fix a problem with \mathchoice when the contents have negative width in Firefox (needed to resolve issue #148 in Firefox)

Diffstat:
M
extensions/TeX/mathchoice.js
 | 
2
+-
M
unpacked/extensions/TeX/mathchoice.js
 | 
10
++++++++++

2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/extensions/TeX/mathchoice.js b/extensions/TeX/mathchoice.js
@@ -12,5 +12,5 @@
  *      http://www.apache.org/licenses/LICENSE-2.0
  */
 
-MathJax.Hub.Register.StartupHook("TeX Jax Ready",function(){var c="1.1";var a=MathJax.ElementJax.mml;var d=MathJax.InputJax.TeX;var b=d.Definitions;b.macros.mathchoice="MathChoice";d.Parse.Augment({MathChoice:function(f){var i=this.ParseArg(f),e=this.ParseArg(f),g=this.ParseArg(f),h=this.ParseArg(f);this.Push(a.TeXmathchoice(i,e,g,h))}});a.TeXmathchoice=a.mbase.Subclass({type:"TeXmathchoice",choice:function(){var e=this.getValues("displaystyle","scriptlevel");if(e.scriptlevel>0){return Math.min(3,e.scriptlevel+1)}return(e.displaystyle?0:1)},setTeXclass:function(e){return this.Core().setTeXclass(e)},isSpacelike:function(){return this.Core().isSpacelike()},isEmbellished:function(){return this.Core().isEmbellished()},Core:function(){return this.data[this.choice()]},toHTML:function(e){e=this.HTMLcreateSpan(e);e.bbox=this.Core().toHTML(e).bbox;return e}});MathJax.Hub.Startup.signal.Post("TeX mathchoice Ready")});MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/mathchoice.js");
+MathJax.Hub.Register.StartupHook("TeX Jax Ready",function(){var c="1.1";var a=MathJax.ElementJax.mml;var d=MathJax.InputJax.TeX;var b=d.Definitions;b.macros.mathchoice="MathChoice";d.Parse.Augment({MathChoice:function(f){var i=this.ParseArg(f),e=this.ParseArg(f),g=this.ParseArg(f),h=this.ParseArg(f);this.Push(a.TeXmathchoice(i,e,g,h))}});a.TeXmathchoice=a.mbase.Subclass({type:"TeXmathchoice",choice:function(){var e=this.getValues("displaystyle","scriptlevel");if(e.scriptlevel>0){return Math.min(3,e.scriptlevel+1)}return(e.displaystyle?0:1)},setTeXclass:function(e){return this.Core().setTeXclass(e)},isSpacelike:function(){return this.Core().isSpacelike()},isEmbellished:function(){return this.Core().isEmbellished()},Core:function(){return this.data[this.choice()]},toHTML:function(e){e=this.HTMLcreateSpan(e);e.bbox=this.Core().toHTML(e).bbox;if(e.firstChild&&e.firstChild.style.marginLeft){e.style.marginLeft=e.firstChild.style.marginLeft;e.firstChild.style.marginLeft=""}return e}});MathJax.Hub.Startup.signal.Post("TeX mathchoice Ready")});MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/mathchoice.js");
 
diff --git a/unpacked/extensions/TeX/mathchoice.js b/unpacked/extensions/TeX/mathchoice.js
@@ -56,6 +56,16 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
     toHTML: function (span) {
       span = this.HTMLcreateSpan(span);
       span.bbox = this.Core().toHTML(span).bbox;
+      // Firefox doesn't correctly handle a span with a negatively sized content,
+      //   so move marginLeft to main span (this is a hack to get \iiiint to work).
+      //   FIXME:  This is a symptom of a more general problem with Firefox, and
+      //           there probably needs to be a more general solution (e.g., modifying
+      //           HTMLhandleSpace() to get the width and adjust the right margin to
+      //           compensate for negative-width contents)
+      if (span.firstChild && span.firstChild.style.marginLeft) {
+        span.style.marginLeft = span.firstChild.style.marginLeft;
+        span.firstChild.style.marginLeft = "";
+      }
       return span;
     }
   });