Add .usf (Unreal Engine shaders) to the list of supported extensions

[inequation]

I work with the Unreal Engine 4 and I'd love it if I didn't have to manually change the GUID every time a HLSL Tools update arrives. ;)

Perhaps you could just add this extension to the manifest? It's not a widely used one, there is little chance of ambiguity.

[tgjones]

As @samizzo noted here, I should be able to implement IVsEditorFactory and then have HLSL Tools show up in Tools -> Options -> Text Editor -> File Extension. (Although as noted here, there appear to be some bugs in VS around this feature.)

[samizzo]

I'm not 100% certain that it isn't my implementation at fault, because writing VS extensions is stupidly complex! But I did find a blog post about the issue where VS kept losing the extension associations.

[tgjones]

@samizzo I've found a solution to the File > Recent Files bug. You need to add an entry to the FileExtensionMapping registry key, like Roslyn does here. I've written a ProvideFileExtensionMapping attribute class to do it in C# instead of a .pkgdef file.

[samizzo]

Awesome thanks for letting me know!

[samizzo]

I just implemented this for NShader and I noticed that if I have both ProvideEditorFactory and ProvideFileExtensionMapping on my package, I get two entries in the drop down in Tools->Options->Text Editor->File Extension. Do you see that?

[tgjones]

If I have both ProvideEditorExtension and ProvideFileExtensionMapping on the package, then yes, I see two entries. Thanks for spotting that, I'll fix it now. (But I can have both ProvideEditorFactory and ProvideFileExtensionMapping without causing a duplicate.)

[inequation]

Hey guys, just dropping by to say I really appreciate the change. :) Thanks for making my life easier!