Makes the Dock icon only appear when a script plugin has a dialog.
Unfortunately, on MacOS where "transient for" doesn't work,
we need a Dock icon for the separate process so user can "Show window."
See #12150
Done at runtime.
A build-time alternative is: package script-fu binary in a bundle, and set properties.
Fixes both the new-style dialog (GimpProcedureDialog) and the old-style dialog (deprecated.)
The gimp app and extension-script-fu (long-running)
are separate processes and "apps."
An app can be "active": in front and receiving GUI events.
As reported, on MacOS, when an extension-script-fu plugin yields,
the gimp app did not become active.
Also, on the second invocation of a plugin served by extension-script-fu,
the dialog could be hidden or require an extra click
because extension-script-fu was not active.
(Independently interpreted plugins did become active,
because it was a new process and gimpui_init activates on MacOS.)
On MacOS:
1. after the first dialog shown by extension-script-fu,
ensure subsequent calls to plugin make extension-script-fu active.
2. After a plugin yields, plugin manager ensure the Gimp app is active.
Note that this is done whenever a TEMPORARY procedure returns.
Most are calls to extension-script-fu plugins.
But some are also callbacks from Resource choosers running in the gimp app.
When they return, the gimp app remains active, and user must first click in
the plugin dialog to continue working.
Especially when the user clicks OK in a Resource Chooser, closing the chooser,
it would be nice if the plugin dialog became active.
That requires more, FUTURE development.
Special to MacOS: on Linux, "transient for foreign window" ensures this,
but that doesn't work on MacOS.
The fix is somewhat brute force and as simple as possible.
There is a more cooperative API for app activation on MacOS.
An app yields, and apps request, not force, self or other app be activated.
The fix does not use the cooperative API.
To do so would require a platform abstraction layer, in GIMP or Gtk.
The fix also sprinkles the code with #ifdefs.
That could be hidden if there were a platform abstraction layer PAL
The layer would be the greatest common denominator across platforms.
PAL methods would always be called in GIMP code,
but not do anything when the effect was accomplished another way.
For example "gimp_platform_request_app_active"
would request the app was active,
but do nothing on Linux where that is ensured by "transient for."
Building on prior commits, with a few small fixes to them.
First demonstrable changes towards #12605.
Font map plugin is ported as a test case.
Old-style plugins using script-fu-register still work.
Fixes errors introduced by my prior commit c0ca0b74
1. SF is storing colors in GimpRGB, not GeglColor.
Storing using wrong pointer type seemed to work, but would not build on newer compilers.
2. spurious error message "CRITICAL....Two different plugins tried to register..."
Due to calling gimp_ui_init too early, in the class instance init.
For version 3 scripts, using script-fu-register-filter
Widgets for SF-OPTION and SF-DIRNAME
Fixes#9992
Test case is Sphere v3.
Note that SF-VECTORS is still not supported,
until there is a VectorsChooser widget in libgimp.
A step towards deprecating old-style scripts using script-fu-register,
and deleting script-fu-interface, the duplicate dialog for SF.
But we still need to change or replace script-fu-register (for non-filter plugins)
to use GimpProcedureDialog.
This goes with our planned change of not making GimpProcedure arguments order
relevant anymore regarding the PDB API. In particular, it means we don't want to
use GimpValueArray for various procedure arguments API, but directly
GimpProcedureConfig objects.
This change will allow to add or reorder arguments in the future, so that we
won't have to create new PDB procedures when adding new arguments, while still
keeping PDB API stability.
Resolves#8382
Also v2 scripts infer and set sensitivity to drawables
Add two test plugins clothify-v3.scm and test-sphere-v3.scm.
Temporary, to be removed when 3.0 ships.
Some refactoring (extracting methods, moving functions to new files).
Some drive-by fixes to script-fu-arg.c revealed by using GimpProcedureDialog.
