From c5c01bd60b5c9d9c51d737b424d8589a629d97aa Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Sun, 1 May 2011 09:28:49 -0400
Subject: [PATCH] Abstract lists of (prioritiezed) callbacks into an object,
 and use it to replace ExecuteHooks, and to allow priorities for callback
 hooks (StartupHook, MessageHook, LoadHook, and PreProcessors).  This can also
 be used to provide hooks for other actions, like pre- and post-filtering math
 or errors, etc.

---
 MathJax.js          |   2 +-
 unpacked/MathJax.js | 129 +++++++++++++++++++++++++-------------------
 2 files changed, 76 insertions(+), 55 deletions(-)

diff --git a/MathJax.js b/MathJax.js
index a0ea58b4e..c345e4cbc 100644
--- a/MathJax.js
+++ b/MathJax.js
@@ -26,5 +26,5 @@ if (!window.MathJax) {window.MathJax = {}}
 
 MathJax.isPacked = true;
 
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g=MathJax.Object.Subclass({JAXFILE:"jax.js",require:null,config:{},Init:function(i,h){if(arguments.length===0){return this}return(this.constructor.Subclass(i,h))()},Augment:function(k,j){var i=this.constructor,h={};if(k!=null){for(var l in k){if(k.hasOwnProperty(l)){if(typeof k[l]==="function"){i.protoFunction(l,k[l])}else{h[l]=k[l]}}}if(k.toString!==i.prototype.toString&&k.toString!=={}.toString){i.protoFunction("toString",k.toString)}}c.Insert(i.prototype,h);i.Augment(null,j);return this},Process:function(h){var i=a.Require(this.directory+"/"+this.JAXFILE);if(!i.called){this.constructor.prototype.Process=function(j){return i}}return i},Translate:function(h){throw Error(this.directory+"/"+this.JAXFILE+" failed to redefine the Translate() method")},Register:function(h){},Config:function(){this.config=c.CombineConfig(this.id,this.config);if(this.config.Augment){this.Augment(this.config.Augment)}},Startup:function(){},loadComplete:function(n){if(n==="config.js"){return 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l=b.ElementJax.directory+"/"+k[n]+"/"+this.JAXFILE;if(!this.require){this.require=[]}else{if(!(this.require instanceof Array)){this.require=[this.require]}}this.require.push(l);j.Push(a.Require(l))}var p=j.Push(a.Require(this.directory+"/"+this.JAXFILE));if(!p.called){this.constructor.prototype.Process=function(){return p}}k=c.config.outputJax["jax/"+k[0]];if(k){j.Push(a.Require(k[0].directory+"/"+this.JAXFILE))}return j.Push({})},Register:function(h){if(!c.config.inputJax){c.config.inputJax={}}c.config.inputJax[h]=this}},{version:"1.1",directory:g.directory+"/input",extensionDir:g.extensionDir});b.OutputJax=g.Subclass({Register:function(i){var h=c.config.outputJax;if(!h[i]){h[i]=[]}if(h[i].length&&(this.id===c.config.menuSettings.renderer||(h.order[this.id]||0)<(h.order[h[i][0].id]||0))){h[i].unshift(this)}else{h[i].push(this)}if(!this.require){this.require=[]}else{if(!(this.require instanceof Array)){this.require=[this.require]}}this.require.push(b.ElementJax.directory+"/"+(i.split(/\//)[1])+"/"+this.JAXFILE)},Remove:function(h){}},{version:"1.1",directory:g.directory+"/output",extensionDir:g.extensionDir,fontDir:e+(b.isPacked?"":"/..")+"/fonts"});b.ElementJax=g.Subclass({Init:function(i,h){return this.constructor.Subclass(i,h)},inputJax:null,outputJax:null,inputID:null,originalText:"",mimeType:"",Text:function(i,j){var h=this.SourceElement();b.HTML.setScript(h,i);h.MathJax.state=this.STATE.UPDATE;return c.Update(h,j)},Reprocess:function(i){var h=this.SourceElement();h.MathJax.state=this.STATE.UPDATE;return c.Reprocess(h,i)},Update:function(i){var h=this.SourceElement();h.MathJax.state=this.STATE.OUTPUT;return c.Process(h,i)},Remove:function(){this.outputJax.Remove(this);c.signal.Post(["Remove Math",this.inputID]);this.Detach()},SourceElement:function(){return document.getElementById(this.inputID)},Attach:function(i,j){var h=i.MathJax.elementJax;if(i.MathJax.state===this.STATE.UPDATE){h.Clone(this)}else{h=i.MathJax.elementJax=this;if(i.id){this.inputID=i.id}else{i.id=this.inputID=b.ElementJax.GetID();this.newID=1}}h.originalText=(i.text==""?i.innerHTML:i.text);h.inputJax=j;if(h.root){h.root.inputID=h.inputID}},Detach:function(){var h=this.SourceElement();if(!h){return}try{delete h.MathJax}catch(i){h.MathJax=null}if(this.newID){h.id=""}},Clone:function(h){var i;for(i in this){if(!this.hasOwnProperty(i)){continue}if(typeof(h[i])==="undefined"&&i!=="newID"){delete this[i]}}for(i in h){if(!this.hasOwnProperty(i)){continue}if(typeof(this[i])==="undefined"||(this[i]!==h[i]&&i!=="inputID")){this[i]=h[i]}}}},{version:"1.1",directory:g.directory+"/element",extensionDir:g.extensionDir,ID:0,STATE:{PENDING:1,PROCESSED:2,UPDATE:3,OUTPUT:4},GetID:function(){this.ID++;return"MathJax-Element-"+this.ID},Subclass:function(){var h=g.Subclass.apply(this,arguments);h.loadComplete=this.prototype.loadComplete;return h}});b.ElementJax.prototype.STATE=b.ElementJax.STATE})("MathJax");(function(l){var f=window[l];if(!f){f=window[l]={}}var c=f.Hub;var q=c.Startup;var u=c.config;var e=document.getElementsByTagName("head")[0];if(!e){e=document.childNodes[0]}var b=(document.documentElement||document).getElementsByTagName("script");var d=new RegExp("(^|/)"+l+"\\.js(\\?.*)?$");for(var o=b.length-1;o>=0;o--){if(b[o].src.match(d)){q.script=b[o].innerHTML;if(RegExp.$2){var r=RegExp.$2.substr(1).split(/\&/);for(var n=0,h=r.length;n<h;n++){var k=r[n].match(/(.*)=(.*)/);if(k){q.params[unescape(k[1])]=unescape(k[2])}}}u.root=b[o].src.replace(/(^|\/)[^\/]*(\?.*)?$/,"");break}}f.Ajax.config=u;var a={isMac:(navigator.platform.substr(0,3)==="Mac"),isPC:(navigator.platform.substr(0,3)==="Win"),isMSIE:(window.ActiveXObject!=null&&window.clipboardData!=null),isFirefox:(window.netscape!=null&&document.ATTRIBUTE_NODE!=null&&!window.opera),isSafari:(navigator.userAgent.match(/ (Apple)?WebKit\//)!=null&&!window.chrome),isChrome:(window.chrome!=null&&window.chrome.loadTimes!=null),isOpera:(window.opera!=null&&window.opera.version!=null),isKonqueror:(window.hasOwnProperty&&window.hasOwnProperty("konqueror")&&navigator.vendor=="KDE"),versionAtLeast:function(x){var w=(this.version).split(".");x=(new String(x)).split(".");for(var y=0,j=x.length;y<j;y++){if(w[y]!=x[y]){return parseInt(w[y]||"0")>=parseInt(x[y])}}return true},Select:function(j){var i=j[c.Browser];if(i){return i(c.Browser)}return null}};var g=navigator.userAgent.replace(/^Mozilla\/(\d+\.)+\d+ /,"").replace(/[a-z][-a-z0-9._: ]+\/\d+[^ ]*-[^ ]*\.([a-z][a-z])?\d+ /i,"").replace(/Gentoo |Ubuntu\/(\d+\.)*\d+ (\([^)]*\) )?/,"");c.Browser=c.Insert(c.Insert(new String("Unknown"),{version:"0.0"}),a);for(var t in a){if(a.hasOwnProperty(t)){if(a[t]&&t.substr(0,2)==="is"){t=t.slice(2);if(t==="Mac"||t==="PC"){continue}c.Browser=c.Insert(new String(t),a);var p=new RegExp(".*(Version)/((?:\\d+\\.)+\\d+)|.*("+t+")"+(t=="MSIE"?" ":"/")+"((?:\\d+\\.)*\\d+)|(?:^|\\(| )([a-z][-a-z0-9._: ]+|(?:Apple)?WebKit)/((?:\\d+\\.)+\\d+)");var s=p.exec(g)||["","","","unknown","0.0"];c.Browser.name=(s[1]=="Version"?t:(s[3]||s[5]));c.Browser.version=s[2]||s[4]||s[6];break}}}c.Browser.Select({Safari:function(j){var i=parseInt((String(j.version).split("."))[0]);if(i>85){j.webkit=j.version}if(i>=533){j.version="5.0"}else{if(i>=526){j.version="4.0"}else{if(i>=525){j.version="3.1"}else{if(i>500){j.version="3.0"}else{if(i>400){j.version="2.0"}else{if(i>85){j.version="1.0"}}}}}}},Firefox:function(j){if(j.version==="0.0"&&navigator.product==="Gecko"&&navigator.productSub){var i=navigator.productSub.substr(0,8);if(i>="20090630"){j.version="3.5"}else{if(i>="20080617"){j.version="3.0"}else{if(i>="20061024"){j.version="2.0"}}}}},Opera:function(i){i.version=opera.version()},MSIE:function(i){i.isIE9=!!(document.documentMode&&(window.performance||window.msPerformance));MathJax.HTML.setScriptBug=!i.isIE9||document.documentMode<9}});c.Browser.Select(MathJax.Message.browsers);c.queue=f.Callback.Queue();c.queue.Push(["Post",q.signal,"Begin"],["Config",q],["Cookie",q],["Styles",q],function(){var i=f.Callback.Queue(q.Jax(),q.Extensions());return i.Push({})},["Menu",q],q.onLoad(),function(){MathJax.isReady=true},["Typeset",q],["Post",q.signal,"End"])})("MathJax")}};
 
diff --git a/unpacked/MathJax.js b/unpacked/MathJax.js
index 5eaf648a3..b46fb02c1 100644
--- a/unpacked/MathJax.js
+++ b/unpacked/MathJax.js
@@ -29,7 +29,7 @@ if (document.getElementById && document.childNodes && document.createElement) {
 if (!window.MathJax) {window.MathJax= {}}
 if (!MathJax.Hub) {  // skip if already loaded
   
-MathJax.version = "1.1.3";
+MathJax.version = "1.1.4";
 
 /**********************************************************/
 
@@ -365,25 +365,52 @@ MathJax.version = "1.1.3";
   };
 
   //
-  //  Run an array of callbacks passing them the given data.
-  //  If any return callbacks, return a callback that will be 
-  //  executed when they all have completed.
+  //  An array or priorities hooks that are executed sequentially
+  //  with a given set of data.
   //
-  var HOOKS = function (hooks,data,reset) {
-    if (!hooks) {return null}
-    if (!(hooks instanceof Array)) {hooks = [hooks]}
-    if (!(data instanceof Array))  {data = (data == null ? [] : [data])}
-    var callbacks = [{}];
-    for (var i = 0, m = hooks.length; i < m; i++) {
-      if (reset) {hooks[i].reset()}
-      var result = hooks[i].apply(window,data);
-      if (ISCALLBACK(result) && !result.called) {callbacks.push(result)}
+  var HOOKS = MathJax.Object.Subclass({
+    //
+    //  Initialize the array and the auto-reset status
+    //
+    Init: function (reset) {
+      this.hooks = [];
+      this.reset = reset;
+    },
+    //
+    //  Add a callback to the list, in priority order (default priority is 10)
+    //
+    Add: function (hook,priority) {
+      if (priority == null) {priority = 10}
+      if (!ISCALLBACK(hook)) {hook = USING(hook)}
+      hook.priority = priority;
+      var i = this.hooks.length;
+      while (i > 0 && priority < this.hooks[i-1].priority) {i--}
+      this.hooks.splice(i,0,hook);
+      return hook;
+    },
+    Remove: function (hook) {
+      for (var i = 0, m = this.hooks.length; i < m; i++) {
+        if (this.hooks[i] === hook) {this.hooks.splice(i,1); return}
+      }
+    },
+    //
+    //  Execute the list of callbacks, resetting them if requested.
+    //  If any return callbacks, return a callback that will be 
+    //  executed when they all have completed.
+    //
+    Execute: function () {
+      var callbacks = [{}];
+      for (var i = 0, m = this.hooks.length; i < m; i++) {
+        if (this.reset) {this.hooks[i].reset()}
+        var result = this.hooks[i].apply(window,arguments);
+        if (ISCALLBACK(result) && !result.called) {callbacks.push(result)}
+      }
+      if (callbacks.length === 1) {return null}
+      if (callbacks.length === 2) {return callbacks[1]}
+      return AFTER.apply({},callbacks);
     }
-    if (callbacks.length === 1) {return null}
-    if (callbacks.length === 2) {return callbacks[1]}
-    return AFTER.apply({},callbacks);
-  };
-  
+  });
+   
   //
   //  Command queue that performs commands in order, waiting when
   //  necessary for commands to complete asynchronousely
@@ -446,8 +473,8 @@ MathJax.version = "1.1.3";
     Init: function (name) {
       QUEUE.prototype.Init.call(this);
       this.name = name;
-      this.posted = [];     // the messages posted so far
-      this.listeners = [];  // those with interest in this signal
+      this.posted = [];              // the messages posted so far
+      this.listeners = HOOKS(true);  // those with interest in this signal
     },
     //
     // Post a message to the signal listeners, with callback for when complete
@@ -459,12 +486,9 @@ MathJax.version = "1.1.3";
       } else {
         this.callback = callback; callback.reset();
         if (!forget) {this.posted.push(message)}
-        this.Suspend(); this.posting = 1;
-        for (var i = 0, m = this.listeners.length; i < m; i++) {
-          this.listeners[i].reset();
-          var result = (this.listeners[i])(message);
-          if (ISCALLBACK(result) && !result.called) {WAITFOR(result,this)}
-        }
+        this.Suspend(); this.posting = true;
+        var result = this.listeners.Execute(message);
+        if (ISCALLBACK(result) && !result.called) {WAITFOR(result,this)}
         this.Resume(); delete this.posting;
         if (!this.pending) {this.call()}
       }
@@ -490,11 +514,11 @@ MathJax.version = "1.1.3";
     
     //
     //  A listener calls this to register intrest in the signal (so it will be called
-    //  when posts occur).  If ignorePast is 1, it will not be sent the post history.
+    //  when posts occur).  If ignorePast is true, it will not be sent the post history.
     //
-    Interest: function (callback,ignorePast) {
+    Interest: function (callback,ignorePast,priority) {
       callback = USING(callback);
-      this.listeners[this.listeners.length] = callback;
+      this.listeners.Add(callback,priority);
       if (!ignorePast) {
         for (var i = 0, m = this.posted.length; i < m; i++) {
           callback.reset();
@@ -508,19 +532,17 @@ MathJax.version = "1.1.3";
     //  A listener calls this to remove itself from a signal
     //
     NoInterest: function (callback) {
-      for (var i = 0, m = this.listeners.length; i < m; i++) {
-        if (this.listeners[i] === callback) {this.listeners.splice(i,1); return}
-      }
+      this.listeners.Remove(callback);
     },
     
     //
     //  Hook a callback to a particular message on this signal
     //
-    MessageHook: function (msg,callback) {
+    MessageHook: function (msg,callback,priority) {
       callback = USING(callback);
       if (!this.hooks) {this.hooks = {}; this.Interest(["ExecuteHooks",this])}
-      if (!this.hooks[msg]) {this.hooks[msg] = []}
-      this.hooks[msg].push(callback);
+      if (!this.hooks[msg]) {this.hooks[msg] = HOOKS(true)}
+      this.hooks[msg].Add(callback,priority);
       for (var i = 0, m = this.posted.length; i < m; i++)
         {if (this.posted[i] == msg) {callback.reset(); callback(this.posted[i])}}
       return callback;
@@ -530,7 +552,8 @@ MathJax.version = "1.1.3";
     //
     ExecuteHooks: function (msg,more) {
       var type = ((msg instanceof Array) ? msg[0] : msg);
-      return HOOKS(this.hooks[type],[msg],true);
+      if (!this.hooks[type]) {return null}
+      return this.hooks[type].Execute(msg);
     }
     
   },{
@@ -549,7 +572,7 @@ MathJax.version = "1.1.3";
   BASE.Callback.After = AFTER;
   BASE.Callback.Queue = QUEUE;
   BASE.Callback.Signal = SIGNAL.find;
-  BASE.Callback.ExecuteHooks = HOOKS;
+  BASE.Callback.Hooks = HOOKS;
 })("MathJax");
 
 /**********************************************************/
@@ -634,8 +657,7 @@ MathJax.version = "1.1.3";
         else {type = file.split(/\./).pop().toUpperCase()}
       file = this.fileURL(file);
       if (this.loading[file]) {
-        if (!this.loadHooks[file]) {this.loadHooks[file] = []}
-        this.loadHooks[file].push(callback);
+        this.addHook(file,callback);
       } else {
         this.head = HEAD(this.head);
         if (this.loader[type]) {this.loader[type].call(this,file,callback)}
@@ -648,18 +670,18 @@ MathJax.version = "1.1.3";
     //  Register a load hook for a particular file (it will be called when
     //  loadComplete() is called for that file)
     //
-    LoadHook: function (file,callback) {
+    LoadHook: function (file,callback,priority) {
       callback = BASE.Callback(callback);
       if (file instanceof Object) {for (var i in file) {file = file[i]}}
       file = this.fileURL(file);
-      if (this.loaded[file]) {
-        callback(this.loaded[file]);
-      } else {
-        if (!this.loadHooks[file]) {this.loadHooks[file] = []}
-        this.loadHooks[file].push(callback);
-      }
+      if (this.loaded[file]) {callback(this.loaded[file])}
+        else {this.addHook(file,callback,priority)}
       return callback;
     },
+    addHook: function (file,callback,priority) {
+      if (!this.loadHooks[file]) {this.loadHooks[file] = MathJax.Callback.Hooks()}
+      this.loadHooks[file].Add(callback,priority);
+    },
     
     //
     //  Used when files are combined in a preloading configuration file
@@ -817,13 +839,13 @@ MathJax.version = "1.1.3";
 	  SCRIPTS.push(loading.script);
 	}
         this.loaded[file] = loading.status; delete this.loading[file];
-        if (!this.loadHooks[file]) {this.loadHooks[file] = []}
-        this.loadHooks[file].push(loading.callback);
+        this.addHook(file,loading.callback);
       } else {
         this.loaded[file] = this.STATUS.OK;
         loading = {status: this.STATUS.OK}
       }
-      BASE.Callback.ExecuteHooks(this.loadHooks[file],loading.status);
+      if (!this.loadHooks[file]) {return null}
+      return this.loadHooks[file].Execute(loading.status);
     },
     
     //
@@ -1180,8 +1202,8 @@ MathJax.Hub = {
     "v1.0-compatible": true,  // set to false to prevent loading of default configuration file
     elements: [],    // array of elements to process when none is given explicitly
      
-    preProcessors: [], // list of callbacks for preprocessing (initialized by extensions)
-    inputJax: {},      // mime-type mapped to input jax (by registration)
+    preProcessors: MathJax.Callback.Hooks(true), // list of callbacks for preprocessing (initialized by extensions)
+    inputJax: {},          // mime-type mapped to input jax (by registration)
     outputJax: {order:{}}, // mime-type mapped to output jax list (by registration)
 
     menuSettings: {
@@ -1222,7 +1244,7 @@ MathJax.Hub = {
   },
   
   Register: {
-    PreProcessor: function (callback) {MathJax.Hub.config.preProcessors.push(MathJax.Callback(callback))},
+    PreProcessor: function () {MathJax.Hub.config.preProcessors.Add.apply(MathJax.Hub.config.preProcessors,arguments)},
     MessageHook: function () {return MathJax.Hub.signal.MessageHook.apply(MathJax.Hub.signal,arguments)},
     StartupHook: function () {return MathJax.Hub.Startup.signal.MessageHook.apply(MathJax.Hub.Startup.signal,arguments)},
     LoadHook: function () {return MathJax.Ajax.LoadHook.apply(MathJax.Ajax,arguments)}
@@ -1301,8 +1323,7 @@ MathJax.Hub = {
       if (ec.elements[i]) {
         queue.Push(
           ["Post",this.signal,["Begin PreProcess",ec.elements[i]]],
-          ["ExecuteHooks",MathJax.Callback,
-            (arguments.callee.disabled ? [] : this.config.preProcessors), ec.elements[i], true],
+          (arguments.callee.disabled? {} : ["Execute",this.config.preProcessors,ec.elements[i]]),
           ["Post",this.signal,["End PreProcess",ec.elements[i]]]
         );
       }