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Automatically fix Office preview handler registry

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This function requires QuickLook to run with administrator privileges and preview the corresponding Office file once
This commit is contained in:
ema
2025-06-12 15:25:18 +08:00
parent 9a3591e6f6
commit e2e5885fd5
4 changed files with 103 additions and 35 deletions
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35
QuickLook.Plugin/QuickLook.Plugin.OfficeViewer/Plugin.cs
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@@ -31,8 +31,8 @@ public class Plugin : IViewer
[
".doc", ".docx", ".docm",
".xls", ".xlsx", ".xlsm", ".xlsb",
".vsd", ".vsdx",
".ppt", ".pptx",
".vsd", ".vsdx",
".odt", ".ods", ".odp"
];
@@ -52,12 +52,41 @@ public class Plugin : IViewer
if (!Extensions.Any(path.ToLower().EndsWith))
return false;
var previewHandler = PreviewHandlerHost.GetPreviewHandlerGUID(path);
var previewHandler = ShellExRegister.GetPreviewHandlerGUID(Path.GetExtension(path));
if (previewHandler == Guid.Empty)
return false;
if (!string.IsNullOrWhiteSpace(CLSIDRegister.GetName($"{{{previewHandler}}}")))
if (!string.IsNullOrWhiteSpace(CLSIDRegister.GetName(previewHandler.ToString("B"))))
{
return true;
}
else
{
// To restore the preview handler CLSID to MS Office
// if running with administrative privileges
if (ShellExRegister.IsRunAsAdmin())
{
var fileExtension = Path.GetExtension(path);
var fallbackHandler = fileExtension switch
{
".doc" or ".docx" or ".docm" or ".odt" => CLSIDRegister.MicrosoftWord,
".xls" or ".xlsx" or ".xlsm" or ".xlsb" or ".ods" => CLSIDRegister.MicrosoftExcel,
".ppt" or ".pptx" or ".odp" => CLSIDRegister.MicrosoftPowerPoint,
".vsd" or ".vsdx" => CLSIDRegister.MicrosoftVisio,
_ => null,
};
if (fallbackHandler == null)
return false;
if (!string.IsNullOrWhiteSpace(CLSIDRegister.GetName(fallbackHandler)))
{
// Admin requested
ShellExRegister.SetPreviewHandlerGUID(fileExtension, new Guid(fallbackHandler));
return true;
}
}
}
return false;
}