Feature: Open folder in new tab when dragging folder to "add tab" button (files-community#14144)

Author: denisdekh

src/Files.App/Views/MainPage.xaml

@@ -155,10 +155,13 @@
 Padding="8"
 HorizontalAlignment="Left"
 VerticalAlignment="Bottom"
+AllowDrop="True"
 AutomationProperties.Name="{x:Bind Commands.NewTab.AutomationName}"
 Background="Transparent"
 BorderThickness="0"
 Command="{x:Bind Commands.NewTab}"
+DragOver="HorizontalMultitaskingControlAddButton_DragOver"
+Drop="HorizontalMultitaskingControlAddButton_Drop"
 ToolTipService.ToolTip="{x:Bind Commands.NewTab.LabelWithHotKey, Mode=OneWay}">
 <Button.Content>
 <FontIcon

src/Files.App/Views/MainPage.xaml.cs

@@ -12,7 +12,9 @@
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Input;
 using Microsoft.UI.Xaml.Navigation;
+using System.Data;
 using Windows.ApplicationModel;
+using Windows.ApplicationModel.DataTransfer;
 using Windows.Foundation.Metadata;
 using Windows.Services.Store;
 using WinRT.Interop;
@@ -175,10 +177,10 @@ public void MultitaskingControl_CurrentInstanceChanged(object? sender, CurrentIn
 SidebarAdaptiveViewModel.PaneHolder.PropertyChanged -= PaneHolder_PropertyChanged;
 
 var navArgs = e.CurrentInstance.TabItemParameter?.NavigationParameter;
- if (e.CurrentInstance is IPaneHolder currentInstance)
- {
- SidebarAdaptiveViewModel.PaneHolder = currentInstance;
- SidebarAdaptiveViewModel.PaneHolder.PropertyChanged += PaneHolder_PropertyChanged;
+if (e.CurrentInstance is IPaneHolder currentInstance)
+{
+SidebarAdaptiveViewModel.PaneHolder = currentInstance;
+SidebarAdaptiveViewModel.PaneHolder.PropertyChanged += PaneHolder_PropertyChanged;
 }
 SidebarAdaptiveViewModel.NotifyInstanceRelatedPropertiesChanged((navArgs as PaneNavigationArguments)?.LeftPaneNavPathParam);
 
@@ -474,6 +476,64 @@ private void RootGrid_PreviewKeyDown(object sender, KeyRoutedEventArgs e)
 }
 }
 
+private bool lockFlag = false;
+//private string[] dropableArchiveTypes = { "zip", "rar", "7z", "tar" };
+
+private async void HorizontalMultitaskingControlAddButton_Drop(object sender, DragEventArgs e)
+{
+if (lockFlag || !FilesystemHelpers.HasDraggedStorageItems(e.DataView))
+return;
+
+lockFlag = true;
+
+var items = (await FilesystemHelpers.GetDraggedStorageItems(e.DataView))
+.Where(x => x.ItemType is FilesystemItemType.Directory
+//|| dropableArchiveTypes.Contains(x.Name.Split('.').Last().ToLower())
+);
+
+var deferral = e.GetDeferral();
+try
+{
+foreach (var item in items)
+await NavigationHelpers.OpenPathInNewTab(item.Path);
+
+deferral.Complete();
+}
+catch { }
+lockFlag = false;
+}
+
+private async void HorizontalMultitaskingControlAddButton_DragOver(object sender, DragEventArgs e)
+{
+if (!FilesystemHelpers.HasDraggedStorageItems(e.DataView))
+{
+e.AcceptedOperation = DataPackageOperation.None;
+return;
+}
+
+bool hasValidDraggedItems =
+(await FilesystemHelpers.GetDraggedStorageItems(e.DataView)).Any(x => x.ItemType is FilesystemItemType.Directory
+//|| dropableArchiveTypes.Contains(x.Name.Split('.').Last().ToLower())
+);
+
+if (!hasValidDraggedItems)
+{
+e.AcceptedOperation = DataPackageOperation.None;
+return;
+}
+
+try
+{
+e.Handled = true;
+var deferral = e.GetDeferral();
+e.DragUIOverride.IsCaptionVisible = true;
+e.DragUIOverride.Caption = string.Format("OpenInNewTab".GetLocalizedResource());
+e.AcceptedOperation = DataPackageOperation.Link;
+deferral.Complete();
+}
+catch { }
+}
+
 private void NavToolbar_Loaded(object sender, RoutedEventArgs e) => UpdateNavToolbarProperties();
 
 private void PaneSplitter_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e)