The mouse controller had many limitations:
* It was not per-device.
* It was a long hard-coded list of events, which made its evolution
annoying and scrolling the list boring.
* It was starting at button 8, while the first buttons were supposed to
be hardcoded interactions. And it stopped at button 12, while some
device might have more buttons nowadays. See !386.
* The "Grab event" does not seem to work in many cases, according to
feedbacks.
The new GimpModifiersEditor will now handle any button (except the first
button, which is reserved for tools), you can even override or change
default canvas actions (panning, rotation, etc.). It should not be
limited with a max button number either (though I haven't tested with a
device really having a lot of buttons since I don't have any such device
but I did emulate huge button numbers on my stylus with xsetwacom and it
did work well; hopefully I'll get feedbacks). And now it can even run
custom actions.
So basically it should deprecate the mouse controller as the modifiers
editor can do everything the controller could, and more (unless I missed
anything).
When no accelerator was set yet, display relevant information, and when
the button is toggled (waiting for shortcut input), display also
relevant info.
These files seem to have appear ever since the recent gettext changes in
commit f663d26ab5.
In particular, the call to autoreconf seems to be creating these.
intltool has long been dead upstream. Let's not poke the dead corpse,
please.
This commit is quite large, but that's mostly since trying to support a
hybrid of both gettext and intltool with both Meson and Autotools was
really hard, so I stopped trying.
Due to gettext relying on quite some things being at the exactly right
place in the autotools build (like `ABOUT-NLS` and `config.rpath`) we
really needed to cleanup the `autogen.sh` to only call `aclocal` and
`autoreconf`. No more strange magic; I tried to do it without changing
too much in the file, and things just broke. If people want to do
something more custom, they can just change the script directly. This
change also uncovered some problems in our `configure.ac`, like using
deprecated macros.
The following major changes happened:
* meson: Changed `custom_target()` to `i18n.merge_file()` for all
supported file types
* Added `.its` and `.loc` files for the GIMP-specific XML formats, so
that gettext understands them
* For the `.isl` (Window installer stuff) file, there's no easy way to
do this in gettext, so instead we start from an XML file (again with
its own ITS rules etc), translate that with gettext, and then use
`xsltproc` with a bit of magic to output the .isl file for each
language
* the `po*/Makefile.in.in` files are migrated to `Makevars` files,
which gettext natively understands.
Fixes: https://gitlab.gnome.org/GNOME/gimp/-/issues/8028