Implement RecycleBinPanel #1610

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/CLSIDInfoPanel.xaml

@@ -8,11 +8,5 @@
              FontSize="14"
              UseLayoutRounding="True"
              mc:Ignorable="d">
-    <Grid>
+    <ContentPresenter Content="{Binding Content}" />
-        <TextBlock x:Name="UnsupportedTextBlock"
-                   HorizontalAlignment="Center"
-                   VerticalAlignment="Center"
-                   Visibility="Collapsed" />
-        <!--  EMPTY  -->
-    </Grid>
 </UserControl>

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/CLSIDInfoPanel.xaml.cs

@@ -24,6 +24,7 @@ public partial class CLSIDInfoPanel : UserControl
 {
     public CLSIDInfoPanel()
     {
+        DataContext = this;
         InitializeComponent();
     }
 
@@ -31,13 +32,21 @@ public partial class CLSIDInfoPanel : UserControl
     {
         switch (path.ToUpper())
         {
-            case "::{645FF040-5081-101B-9F08-00AA002F954E}"  // Recycle Bin
+            case CLSIDRegister.RecycleBin:
-              or "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}": // This PC
+                Content = new RecycleBinPanel();
+                break;
+
+            case CLSIDRegister.ThisPC:
+                Content = new ThisPCPanel();
                 break;
 
             default:
-                UnsupportedTextBlock.Text = $"Unsupported for {path}";
+                Content = new TextBlock()
-                UnsupportedTextBlock.Visibility = Visibility.Visible;
+                {
+                    Text = $"Unsupported for {path}",
+                    HorizontalAlignment = HorizontalAlignment.Center,
+                    VerticalAlignment = VerticalAlignment.Center,
+                };
                 break;
         }
     }

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/CLSIDRegister.cs

@@ -23,6 +23,9 @@ namespace QuickLook.Plugin.CLSIDViewer;
 
 internal static class CLSIDRegister
 {
+    public const string RecycleBin = "::{645FF040-5081-101B-9F08-00AA002F954E}";
+    public const string ThisPC = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}";
+
     public static string GetName(string clsid)
     {
         try
@@ -31,10 +34,10 @@ internal static class CLSIDRegister
             string displayName = Registry.GetValue($@"HKEY_CLASSES_ROOT\CLSID\{clsid.Replace(":", string.Empty)}", string.Empty, null)?.ToString();
             return displayName;
         }
-        catch (Exception ex)
+        catch (Exception e)
         {
-            Debug.WriteLine("Error reading registry: " + ex.Message);
+            Debug.WriteLine("Error reading registry: " + e.Message);
         }
-        return string.Empty;
+        return null;
     }
 }

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/Plugin.cs

@@ -47,7 +47,12 @@ public class Plugin : IViewer
 
     public void Prepare(string path, ContextObject context)
     {
-        context.PreferredSize = new Size { Width = 520, Height = 192 };
+        context.PreferredSize = path switch
+        {
+            CLSIDRegister.RecycleBin => new Size { Width = 520, Height = 192 },
+            CLSIDRegister.ThisPC => new Size { Width = 900, Height = 800 },
+            _ => new Size { Width = 520, Height = 192 },
+        };
     }
 
     public void View(string path, ContextObject context)
@@ -59,7 +64,7 @@ public class Plugin : IViewer
         _ip.Tag = context;
 
         context.ViewerContent = _ip;
-        context.Title = $"{CLSIDRegister.GetName(path)}";
+        context.Title = $"{CLSIDRegister.GetName(path) ?? path}";
         context.IsBusy = false;
     }
 

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/RecycleBinPanel.xaml

@@ -0,0 +1,24 @@
+<UserControl x:Class="QuickLook.Plugin.CLSIDViewer.RecycleBinPanel"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:local="clr-namespace:QuickLook.Plugin.CLSIDViewer"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             d:DesignHeight="450"
+             d:DesignWidth="800"
+             mc:Ignorable="d">
+    <Grid>
+        <TextBlock x:Name="EmptyRecycleBinText"
+                   HorizontalAlignment="Center"
+                   VerticalAlignment="Center"
+                   Text="Recycle Bin is empty" />
+        <Grid>
+            <Button x:Name="EmptyRecycleBinButton"
+                    Grid.Column="0"
+                    HorizontalAlignment="Center"
+                    VerticalAlignment="Center"
+                    Click="OnEmptyRecycleBinClick"
+                    Content="Empty Recycle Bin" />
+        </Grid>
+    </Grid>
+</UserControl>

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/RecycleBinPanel.xaml.cs

@@ -0,0 +1,105 @@
+// Copyright © 2017-2025 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+using System.Runtime.InteropServices;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace QuickLook.Plugin.CLSIDViewer;
+
+public partial class RecycleBinPanel : UserControl
+{
+    public RecycleBinPanel()
+    {
+        InitializeComponent();
+        Loaded += OnRecycleBinPanelLoaded;
+    }
+
+    private void OnRecycleBinPanelLoaded(object sender, RoutedEventArgs e)
+    {
+        UpdateState();
+    }
+
+    private void OnEmptyRecycleBinClick(object sender, RoutedEventArgs e)
+    {
+        // TODO: Use async to avoid blocking the UI thread
+        if (RecycleBinHelper.EmptyRecycleBin())
+        {
+            UpdateState();
+        }
+    }
+
+    private void UpdateState()
+    {
+        bool hasTrash = RecycleBinHelper.HasTrash();
+
+        EmptyRecycleBinButton.Visibility = hasTrash ? Visibility.Visible : Visibility.Collapsed;
+        EmptyRecycleBinText.Visibility = hasTrash ? Visibility.Collapsed : Visibility.Visible;
+    }
+}
+
+file static class RecycleBinHelper
+{
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+    public struct SHQUERYRBINFO
+    {
+        public uint cbSize;
+        public ulong i64Size;
+        public ulong i64NumItems;
+    }
+
+    [DllImport("shell32.dll", CharSet = CharSet.Unicode)]
+    private static extern int SHQueryRecycleBin(string pszRootPath, ref SHQUERYRBINFO pSHQueryRBInfo);
+
+    [DllImport("shell32.dll", CharSet = CharSet.Unicode)]
+    private static extern int SHEmptyRecycleBin(nint hwnd, string pszRootPath, RecycleFlags dwFlags);
+
+    [Flags]
+    private enum RecycleFlags : uint
+    {
+        SHERB_NOCONFIRMATION = 0x00000001,
+        SHERB_NOPROGRESSUI = 0x00000002,
+        SHERB_NOSOUND = 0x00000004,
+    }
+
+    public static bool HasTrash()
+    {
+        var info = new SHQUERYRBINFO()
+        {
+            cbSize = (uint)Marshal.SizeOf(typeof(SHQUERYRBINFO))
+        };
+
+        int result = SHQueryRecycleBin(null, ref info);
+        
+        if (result == 0) // S_OK
+        {
+            return info.i64NumItems > 0;
+        }
+
+        // Fallback
+        return false;
+    }
+
+    public static bool EmptyRecycleBin()
+    {
+        int result = SHEmptyRecycleBin(IntPtr.Zero, null,
+            RecycleFlags.SHERB_NOCONFIRMATION | RecycleFlags.SHERB_NOPROGRESSUI | RecycleFlags.SHERB_NOSOUND);
+
+        return result == 0;
+    }
+}

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/ThisPCPanel.xaml

@@ -0,0 +1,15 @@
+<UserControl x:Class="QuickLook.Plugin.CLSIDViewer.ThisPCPanel"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:local="clr-namespace:QuickLook.Plugin.CLSIDViewer"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             d:DesignHeight="450"
+             d:DesignWidth="800"
+             mc:Ignorable="d">
+    <Grid>
+        <TextBlock HorizontalAlignment="Center"
+                   VerticalAlignment="Center"
+                   Text="ThisPCPanel" />
+    </Grid>
+</UserControl>

QuickLook.Plugin/QuickLook.Plugin.CLSIDViewer/ThisPCPanel.xaml.cs

@@ -0,0 +1,28 @@
+// Copyright © 2017-2025 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System.Windows.Controls;
+
+namespace QuickLook.Plugin.CLSIDViewer;
+
+public partial class ThisPCPanel : UserControl
+{
+    public ThisPCPanel()
+    {
+        InitializeComponent();
+    }
+}