Re: [bug #4459] gopen wrongly using -a switch

[Jeff Teunissen]

Gregory John Casamento wrote:
> 
> I was actually trying to correct this as well.   When -[NSWorkspace
> openFile:withApplication:] is called using a file type which the
> specified app doesn't recognize, the application refuses to load the
> file.

This is a problem caused by the way NSDocument was designed, and how it
was implemented in GNUstep.

On OPENSTEP, where NSDocument doesn't exist, the same thing can happen,
but it's up to the app whether or not it will. The NSExtensions dictionary
in the application info is only used by the Workspace to determine which
app to use automatically. Apps are suggested to do what they can with
anything they're sent, and sometimes that means to pop up an alert panel
saying they can't open the file.

For applications using NSDocument*, the app itself never sees requests to
open file types it hasn't registered for -- they're silently ignored by
the NSDocument* system.

However, on Mac OS X, TextEdit advertises that it can open the file type
"*", which allows it to open anything.

-- 
| Jeff Teunissen  -=-  Pres., Dusk To Dawn Computing  -=-  deek @ d2dc.net
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