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Safely check office preview handler
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This commit is contained in:
ema
2025-06-11 18:12:31 +08:00
parent 5fd2d8a88a
commit 9a3591e6f6
3 changed files with 55 additions and 5 deletions
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43
QuickLook.Plugin/QuickLook.Plugin.OfficeViewer/CLSIDRegister.cs Normal file
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@@ -0,0 +1,43 @@
// 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 Microsoft.Win32;
using System;
using System.Diagnostics;
namespace QuickLook.Plugin.OfficeViewer;
internal static class CLSIDRegister
{
public const string Office = "{84F66100-FF7C-4fb4-B0C0-02CD7FB668FE}";
public const string Visio = "{279D6C9A-652E-4833-BEFC-312CA8887857}";
public static string GetName(string clsid)
{
try
{
// Such as `Computer\HKEY_CLASSES_ROOT\CLSID\{84F66100-FF7C-4fb4-B0C0-02CD7FB668FE}`
string displayName = Registry.GetValue($@"HKEY_CLASSES_ROOT\CLSID\{clsid}", string.Empty, null)?.ToString();
return displayName;
}
catch (Exception e)
{
Debug.WriteLine("Error reading registry: " + e.Message);
}
return null;
}
}

11
QuickLook.Plugin/QuickLook.Plugin.OfficeViewer/Plugin.cs
View File

@@ -49,8 +49,15 @@ public class Plugin : IViewer
if (Directory.Exists(path))
return false;
if (Extensions.Any(path.ToLower().EndsWith))
return PreviewHandlerHost.GetPreviewHandlerGUID(path) != Guid.Empty;
if (!Extensions.Any(path.ToLower().EndsWith))
return false;
var previewHandler = PreviewHandlerHost.GetPreviewHandlerGUID(path);
if (previewHandler == Guid.Empty)
return false;
if (!string.IsNullOrWhiteSpace(CLSIDRegister.GetName($"{{{previewHandler}}}")))
return true;
return false;
}

6
QuickLook.Plugin/QuickLook.Plugin.OfficeViewer/PreviewHandlerHost.cs
View File

@@ -38,7 +38,7 @@ public class PreviewHandlerHost : Control
private IPreviewHandler _mCurrentPreviewHandler;
/// <summary>
/// Initialialises a new instance of the PreviewHandlerHost class.
/// Initialize a new instance of the PreviewHandlerHost class.
/// </summary>
public PreviewHandlerHost()
{
@@ -82,7 +82,7 @@ public class PreviewHandlerHost : Control
if (ext != null)
{
// open the key that indicates the GUID of the preview handler type
var test = ext.OpenSubKey("shellex\\{8895b1c6-b41f-4c1c-a562-0d564250836f}");
var test = ext.OpenSubKey(@"shellex\{8895b1c6-b41f-4c1c-a562-0d564250836f}");
if (test != null) return new Guid(Convert.ToString(test.GetValue(null)));
// sometimes preview handlers are declared on key for the class
@@ -90,7 +90,7 @@ public class PreviewHandlerHost : Control
if (className != null)
{
test = Registry.ClassesRoot.OpenSubKey(
className + "\\shellex\\{8895b1c6-b41f-4c1c-a562-0d564250836f}");
className + @"\shellex\{8895b1c6-b41f-4c1c-a562-0d564250836f}");
if (test != null) return new Guid(Convert.ToString(test.GetValue(null)));
}
}