Add a button to empty the trash in the drive

www/drive/main.js

@@ -164,10 +164,11 @@ define([
     var $unsortedIcon = $('<span>', {"class": "fa fa-files-o"});
     var $templateIcon = $('<span>', {"class": "fa fa-cubes"});
     var $recentIcon = $('<span>', {"class": "fa fa-clock-o"});
-    var $trashIcon = $('<span>', {"class": "fa fa-trash-o"});
+    var $trashIcon = $('<span>', {"class": "fa fa-trash"});
     var $trashEmptyIcon = $('<span>', {"class": "fa fa-trash-o"});
     //var $collapseIcon = $('<span>', {"class": "fa fa-minus-square-o expcol"});
     var $expandIcon = $('<span>', {"class": "fa fa-plus-square-o expcol"});
+    var $emptyTrashIcon = $('<button>', {"class": "fa fa-ban"});
     var $listIcon = $('<button>', {"class": "fa fa-list"});
     var $gridIcon = $('<button>', {"class": "fa fa-th-large"});
     var $sortAscIcon = $('<span>', {"class": "fa fa-angle-up sortasc"});
@@ -696,6 +697,11 @@ define([
         };
 
         var updateContextButton = function () {
+            if (filesOp.isPathIn(currentPath, [TRASH])) {
+                $driveToolbar.find('cp-app-drive-toolbar-emptytrash').show();
+            } else {
+                $driveToolbar.find('cp-app-drive-toolbar-emptytrash').hide();
+            }
             var $li = $content.find('.selected');
             if ($li.length === 0) {
                 $li = findDataHolder($tree.find('.active'));
@@ -1389,6 +1395,18 @@ define([
             $gridButton.attr('title', Messages.fm_viewGridButton);
             $container.append($listButton).append($gridButton);
         };
+        var createEmptyTrashButton = function ($container) {
+            var $button = $emptyTrashIcon.clone().addClass('element');
+            $button.addClass('cp-app-drive-toolbar-emptytrash');
+            $button.attr('title', Messages.fc_empty);
+            $button.click(function () {
+                Cryptpad.confirm(Messages.fm_emptyTrashDialog, function(res) {
+                    if (!res) { return; }
+                    filesOp.emptyTrash(refresh);
+                });
+            });
+            $container.append($button);
+        };
 
         var getNewPadTypes = function () {
             var arr = [];
@@ -1961,6 +1979,7 @@ define([
                 path = [ROOT];
             }
             var isInRoot = filesOp.isPathIn(path, [ROOT]);
+            var inTrash = filesOp.isPathIn(path, [TRASH]);
             var isTrashRoot = filesOp.comparePath(path, [TRASH]);
             var isTemplate = filesOp.comparePath(path, [TEMPLATE]);
             var isAllFiles = filesOp.comparePath(path, [FILES_DATA]);
@@ -2007,6 +2026,10 @@ define([
                 }
                 createViewModeButton($toolbar.find('.rightside'));
             }
+            if (inTrash) {
+                createEmptyTrashButton($toolbar.find('.rightside'));
+            }
+
             var $list = $('<ul>').appendTo($dirContent);
 
             // NewButton can be undefined if we're in read only mode