fire a warning before closing an unsaved file

applications/admin/static/js/ajax_editor.js

@@ -66,9 +66,8 @@ function doClickSave() {
 					 'doClickSave');
 		},
           success: function(json,text,xhr){
-
-
-
+			jQuery(editor).data('saved', true);	// Set as saved
+			editor.on("change", store_changes_function);	// Re-enable change watcher
             // reenable disabled submit button
 		    var t=jQuery("input[name='save']");
 		    t.attr('class','');

applications/admin/views/default/edit.html

@@ -55,12 +55,18 @@ jQuery(document).on('shown click', 'a[data-toggle="tab"]', function (e) {
 jQuery(document).on('click', '#filesTab button[class="close"]', function (e) {
 	var tab_body   = jQuery(jQuery(this).parent().attr("href"));  // it should be a div
 	var tab_header = jQuery(this).parent().parent();              // it should be a li
-
-	if (tab_header.hasClass('active') === true) { 	//Set active an other tab
-		jQuery(tab_header).prev().children('a[data-toggle="tab"]').tab('show'); // Select first tab		
+	var saved = jQuery(tab_body.find('textarea').data('editor')).data('saved');
+	var close = true;
+	if (saved === false) {
+		close = confirm("You are closing an unsaved file")
+	}
+	if (close) {
+		if (tab_header.hasClass('active') === true) { 	//Set active an other tab
+			jQuery(tab_header).prev().children('a[data-toggle="tab"]').tab('show'); // Select first tab		
+		}
+		tab_header.remove(); //remove li of tab
+		tab_body.remove();   //remove li of tab
 	}
-	tab_header.remove(); //remove li of tab
-	tab_body.remove();   //remove li of tab
 });
 
 // Revert current file

applications/admin/views/default/edit_js.html

@@ -113,6 +113,11 @@
         CodeMirror.showHint(cm, CodeMirror.pythonHint);
       }
 		{{pass}}
+	store_changes_function = function(instance, changeObj) {
+		jQuery(instance).data('saved', false);
+		instance.off("change", store_changes_function);
+	}
+	editor.on("change", store_changes_function);
 		// save the editor as textarea data attribute	
 		jQuery("#{{=id}} textarea").data('editor', editor);
 		var hlLine = editor.addLineClass(0, "background", "activeline");