From 04fa1da315a05da9a96ac843a3670755fad68b47 Mon Sep 17 00:00:00 2001
From: Paul Nicholls <paul.nicholls@canterbury.ac.nz>
Date: Tue, 13 Nov 2012 14:54:48 +1300
Subject: [PATCH] MDL-36548: Major performance boost to Detail (list) view in
 file picker

Pass the data (filelist) into the DataTable when initialising it, rather than rendering an empty DataTable and then pushing all of the data into it via addRows().

It's also slightly more efficient to just pass the node in, rather than fetching the node and passing its ID in, as DataTable.render() will just re-select the node if given the ID. [Spotted by Andrew Nicols]
---
 repository/filepicker.js | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/repository/filepicker.js b/repository/filepicker.js
index 5e848cf977b3e..dd6a0f8085096 100644
--- a/repository/filepicker.js
+++ b/repository/filepicker.js
@@ -321,7 +321,6 @@ YUI.add('moodle-core_filepicker', function(Y) {
         }
         /** initialize table view */
         var initialize_table_view = function() {
-            var parentid = scope.one('.'+classname).get('id');
             var cols = [
                 {key: "displayname", label: M.str.moodle.name, allowHTML: true, formatter: formatTitle,
                     sortable: true, sortFn: sortFoldersFirst},
@@ -332,8 +331,13 @@ YUI.add('moodle-core_filepicker', function(Y) {
                 {key: "mimetype", label: M.str.repository.type, allowHTML: true,
                     sortable: true, sortFn: sortFoldersFirst}
             ];
-            scope.tableview = new Y.DataTable({columns: cols});
-            scope.tableview.render('#'+parentid);
+            for (var k in fileslist) {
+                // to speed up sorting and formatting
+                fileslist[k].displayname = file_get_displayname(fileslist[k]);
+                fileslist[k].isfolder = file_is_folder(fileslist[k]);
+                fileslist[k].classname = options.classnamecallback(fileslist[k]);
+            }
+            scope.tableview = new Y.DataTable({columns: cols, data: fileslist});
             scope.tableview.delegate('click', function (e, tableview) {
                 var record = tableview.getRecord(e.currentTarget.get('id'));
                 if (record) {
@@ -353,13 +357,8 @@ YUI.add('moodle-core_filepicker', function(Y) {
         }
         /** append items in table view mode */
         var append_files_table = function() {
-            for (var k in fileslist) {
-                // to speed up sorting and formatting
-                fileslist[k].displayname = file_get_displayname(fileslist[k]);
-                fileslist[k].isfolder = file_is_folder(fileslist[k]);
-                fileslist[k].classname = options.classnamecallback(fileslist[k]);
-            }
-            scope.tableview.addRows(fileslist);
+            var parentnode = scope.one('.'+classname);
+            scope.tableview.render(parentnode);
             scope.tableview.sortable = options.sortable ? true : false;
         };
         /** append items in tree view mode */