From: Paul Nicholls <paul.nicholls@canterbury.ac.nz>
Date: Tue, 13 Nov 2012 01:54:48 +0000 (+1300)
Subject: MDL-36548: Major performance boost to Detail (list) view in file picker
X-Git-Tag: v2.4.0-rc1~127^2
X-Git-Url: http://git.moodle.org/gw?p=moodle.git;a=commitdiff_plain;h=80d92db940acca7ddb1da1cfba08d8622d31fb74;hp=8ccaa296fa906d1fb4cf75068d8afe5e5e68c031;ds=sidebyside

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]
---

diff --git a/repository/filepicker.js b/repository/filepicker.js
index 8aacf03080d..f7b9c98eb6b 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 */