Let's increase the default size of the metadata viewer a bit.
Ideally we would add some logic to determine the width of
the first column since that one currently depends on the
length of the longest tag. However for now this change
will be enough for most cases.
metadata-editor and metadata-viewer did return GIMP_PDB_SUCCESS when
loading the dialog ui failed, we changed this to GIMP_PDB_EXECUTION_ERROR
and now use a GError to report it back to GIMP.
In metadata-editor also improve the error handling when loading the calendar
dialog fails.
The error also only showed in the console so change that to show a dialog
or the error console.
Adding metadata-tags to meson.build and Makefile.am for
the metadata-viewer since until now it was only used in
the metadata-editor.
The Exif gps metadata tags for longitude, latitude and
altitude get special handling to show them with more
precision and let the string parts be translated.
Turn all ID param specs into object param specs (e.g. GimpParamImageID
becomes GimpParamImage) and convert between IDs and objects in
gimpgpparams.c directly above the the wire protocol, so all of app/,
libgimp/ and plug-ins/ can deal directly with objects down to the
lowest level and not care about IDs.
Use the actual object param specs for procedure arguments and return
values again instead of a plain g_param_spec_object() and bring back
the none_ok parameter.
This implies changing the PDB type checking functions to work on pure
integers instead of IDs (one can't check whether object creation is
possible if performing that check requires the object to already
exist).
For example gimp_foo_is_valid() becomes gimp_foo_id_is_valid() and is
not involved in automatic object creation magic at the protocol
level. Added wrappers which still say gimp_foo_is_valid() and take the
respective objects.
Adapted all code, and it all becomes nicer and less convoluted, even
the generated PDB wrappers in app/ and libgimp/.
The new metadata viewer is based on a version of the old metadata
plugin that still contained this bug, and a few other bugs that've
been fixed since then. Reapply those fixes to the new plugin.
This is essentially an adaptation of commits
f8e291bf31,
ce9e7feabd,
38c79600f1,
and 801bd8fb3f.
Jacob Boerema