Merge remote-tracking branch 'andrew0/editor_hooks'

lib/gollum/frontend/public/javascript/editor/gollum.editor.js

@@ -168,6 +168,9 @@
     },
 
     setActiveLanguage: function( name ) {
+      if(LanguageDefinition.getHookFunctionFor("deactivate")) {
+        LanguageDefinition.getHookFunctionFor("deactivate")();
+      }
       if ( !LanguageDefinition.isLoadedFor(name) ) {
         LanguageDefinition._ACTIVE_LANG = null;
         LanguageDefinition.loadFor( name, function(x, t) {
@@ -186,13 +189,33 @@
             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