This cleans up our close handling of all types (surfaces, tabs, windows).
Surfaces no longer emit their scope; their scope is always just the
surface itself. For tab and window scope we use widget actions.
This makes `close_tab` work properly (previously broken).
This is a (relatively) straightforward port of the terminal inspector
from the old GTK application runtime. It's split into three widgets. At
the lowest level is a widget designed for showing a generic Dear ImGui
application. Above that is a widget that embeds the ImGui widget and
plumbs it into the core Inspector. At the top is a custom Window widget
that embeds the Inspector widget.
And then there's all the plumbing necessary to hook everything into the
rest of Ghostty.
In theory this design _should_ allow showing the Inspector in a split
or a tab in the future, not just in a separate window. It should also
make it easier to display _other_ Dear ImGui applications if they are
ever needed.
This fixes `mouse-hide-while-typing`. Don't know why this worked before
(I tested it yesterday!) but stopped working today. But this now works,
and conceptually makes some sense.
The upstream GIR for g_weak_ref_get is incorrect - it does not allow the
returned value to be NULL. This PR pulls in a new version of our GObject
bindings with that patched and improves the safety of dealing with the
command palette weak reference held by the window.
See ianprime0509/zig-gobject#117
This continues #8202 by fixing two of the known issues: `goto_split` key
binds work and closing a split moves focus to the proper place.
A big improvement in this PR is that for the first time ever in our GTK
backend, the up/down/left/right `goto_split` bindings **use spatial
navigation.** "Spatial navigation" means that the direction to move
focus is done based on the nearest split _visually_ from the current
split, rather than via a tree traversal. We did this on macOS a couple
months ago, with a lot more details there: #7523
Similar to macOS, the spatial navigation is currently based on top-left
corner. Now that our split tree is implemented in Zig though it should
be a lot easier for us to work in the current cursor position as the
reference point.
~~🚧 TODO: Going to add some unit tests for the spatial navigation before
merge.~~
