Now that GimpParamSpecFile makes file validation depending on the action
set in the param spec, when trying to open a non-existing file (which
can happen through GUI, for instance when opening through the Document
History dockable or Open Recent menu), we had a quite obscure error
about a value "out of range" used "for argument 'file' (#2, type
GFile)", which is because core tried to set the GFile for a non-existing
file into the second parameter of the plug-in PDB. This is not a very
nice error for end-users.
The old error was much nicer as it used to say things like:
> Could not open '/path/not/existing.png' for reading: No such file or directory
But in fact, this string came from the plug-in, which means:
* first that the error can be different depending on the format
(inconsistency of error message);
* depending on bugs in plug-ins, it may just crash or return no error
messages;
* finally we were making a useless call to a load plug-in while we
should already know from core that it won't work.
The new message is something like:
> Error when getting information for file "/path/not/existing.png: No such file or directory
This error is generated by core, so it will always be consistently the
same, is understandable too and the plug-in won't even be called.
As a side related fix, I updated the GimpParamSpecFile validation to
only validate local files, just like we do in core. Remote files can
always be set (and we let plug-ins handle them), at least for the time
being.
042d3051c6