This adds a "fancy" theme preview to the `+list-themes` CLI action.
By default, if the command is connected to a TTY, it will display the
fancy preview. If it is not connected to a TTY, or the user specifies
`--plain` on the command line, a simple list of themes will be printed
to stdout.
While in the preview `F1` or `?` will show a help screen.
First, this commit modifies libghostty to use a single unified action
dispatch system based on a tagged union versus the one-off callback
system that was previously in place. This change simplifies the code on
both the core and consumer sides of the library. Importantly, as we
introduce new actions, we can now maintain ABI compatibility so long as
our union size does not change (something I don't promise yet).
Second, this moves a lot more of the functions call on a surface into
the action system. This affects all apprts and continues the previous
work of introducing a more unified API for optional surface features.
This commit increases the value buffer to 11 characters - this is
technically what it should be to allow for large negative integers
(i.e., 2.4 billion plus the sign character).
Additionally corrected the types for 'H' (horizontal offset) and 'V'
(vertical offset) - these are supposed to be i32 versus u32.
Added some extra tests to test all of this stuff as well.
I've also added a few more tests to help track these cases.
Metal already had this change made, so I copied it over from there. This
logic is more straightforward. Also copied the check to skip 0-sized
glyphs, since sometimes, for example, spaces are emitted as glyphs by
the shaper for some reason, even though they have no actual content, and
we want to avoid sending a bunch of useless stuff to the GPU.
This is the way to override the color in libadwaita < 1.6. We can
transition to named colors, specifically headerbar-{fg,bg}-color for
libadwaita 1.6.
Fixes: #2266
Signed-off-by: Tristan Partin <tristan@partin.io>
