Fix change of format (#1419)

* Add empty language def for bibtex

lib/gollum/public/gollum/javascript/editor/langs/bib.js

@@ -0,0 +1,8 @@
+/**
+ *  BibTeX Language Definition
+ *
+ */
+
+(function($) {
+  $.GollumEditor.defineLanguage('bib', {});
+})(jQuery);

lib/gollum/public/gollum/javascript/editor/langs/plaintext.js

@@ -0,0 +1,8 @@
+/**
+ *  Plain Text Language Definition
+ *
+ */
+
+(function($) {
+  $.GollumEditor.defineLanguage('txt', {});
+})(jQuery);

lib/gollum/public/gollum/javascript/gollum.js.erb

@@ -10,9 +10,13 @@ function brokenAvatarImage(image){
 // Get path for named route, prefixing baseUrl if necessary
 // Uses the route definitions in /lib/gollum/views/helpers.rb.
 // For example, routePath('delete') is equivalent to 'delete_path' in the mustache templates.
+var gollumRoutes = $.parseJSON('<%= routes_to_json %>')
 function routePath(name){
-  var routes = $.parseJSON('<%= routes_to_json %>')
-  path = routes[name]
+  path = gollumRoutes[name]
+  return prefixBaseUrl(path);
+}
+
+function prefixBaseUrl(path) {
   if (baseUrl == undefined ) {
     console.log('Gollum error: baseUrl undefined')
   } else if (path == undefined ) {
@@ -72,6 +76,12 @@ function abspath(path, name){
   return [newPath, newName];
 }
 
+var gollumFormats = $.parseJSON('<%= format_extensions %>');
+function formatToExt(format) {
+  // 'markdown' -> .md, 'asciidoc' -> .asciidoc
+  return gollumFormats[format];
+}
+
 function setTextDirection () {
   $('.markdown-body p, .markdown-body span, .markdown-body pre, .markdown-body table').attr('dir','auto');
 }
@@ -405,6 +415,7 @@ $(document).ready(function() {
       $(this).attr('disabled', true);
 
       var formData = new FormData($('#gollum-editor-form').get(0));
+      var newPath  = prefixBaseUrl(pagePath() + '/' + pageName() + formatToExt($('#wiki_format')[0].value));
       var endpoint = $('#gollum-editor-form').attr("action");
 
       $.ajax({
@@ -414,7 +425,7 @@ $(document).ready(function() {
         processData: false,
         contentType: false,
         success: function(data) {
-          window.location = window.location.href.replace(/gollum\/edit\//, '')
+          window.location = newPath;
         },
         error: function(data, textStatus, errorThrown) {
           if (data.status == 412) {