From 9efcf8bfb146853bdd0507632af0ec556c5d922a Mon Sep 17 00:00:00 2001
From: Andrew O'Brien <andrew@econify.com>
Date: Fri, 6 May 2011 11:29:54 -0400
Subject: [PATCH] Added support for activate/deactivate functions in
 LanguageDefinition so that languages that have a client-side component can
 setup and teardown UI elements.

---
 .../public/javascript/editor/gollum.editor.js | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/lib/gollum/frontend/public/javascript/editor/gollum.editor.js b/lib/gollum/frontend/public/javascript/editor/gollum.editor.js
index 48309285..55ee11d4 100755
--- a/lib/gollum/frontend/public/javascript/editor/gollum.editor.js
+++ b/lib/gollum/frontend/public/javascript/editor/gollum.editor.js
@@ -162,6 +162,9 @@
     },
 
     setActiveLanguage: function( name ) {
+      if(LanguageDefinition.getHookFunctionFor("deactivate")) {
+        LanguageDefinition.getHookFunctionFor("deactivate")();
+      }
       if ( !LanguageDefinition.isLoadedFor(name) ) {
         LanguageDefinition._ACTIVE_LANG = null;
         LanguageDefinition.loadFor( name, function(x, t) {
@@ -180,13 +183,33 @@
             FormatSelector.updateSelected();
           }
 
+          if(LanguageDefinition.getHookFunctionFor("activate")) {
+            LanguageDefinition.getHookFunctionFor("activate")();
+          }
         } );
       } else {
         LanguageDefinition._ACTIVE_LANG = name;
         FunctionBar.refresh();
+
+        if(LanguageDefinition.getHookFunctionFor("activate")) {
+          LanguageDefinition.getHookFunctionFor("activate")();
+        }
       }
     },
 
+    getHookFunctionFor: function(attr, specified_lang) {
+      if ( !specified_lang ) {
+        specified_lang = LanguageDefinition._ACTIVE_LANG;
+      }
+
+      if ( LanguageDefinition.isLoadedFor(specified_lang) &&
+           LanguageDefinition._LANG[specified_lang][attr] &&
+           typeof LanguageDefinition._LANG[specified_lang][attr] == 'function' ) {
+        return LanguageDefinition._LANG[specified_lang][attr];
+      }
+
+      return null;
+    },
 
     /**
      *  gets a definition object for a specified attribute