Replace `update_view_border()` with `update_container_border()`. The latter
should handle both the case where the container is a view or if the container
has children.
The previous implementation of focus handling assumed that only views can be
focused. Containers can also be focused with a command like `focus parent` or
`focus child`.
Change `set_focused_container()` to handle the case of the given container
being a container with children and update borders accordingly.
Deeply nested containers which had their layouts changed didn't update
their actual_geometry, this messed up their child containers. Those got
width and height of 0, which was then decreased for stacked/tabbed
containers by title height. Underflow ensued, these containers suddenly
had height 4294967273. In short, not updating actual_geometry didn't
play nicely with nested containers.
When titlebar is hidden, top border of the topmost view inside
tabbed/stacked container will not be drawn. This is changed in layout.c
On the other hand, top border should be drawn sometimes, for example
when titlebar is hidden on a view that is not the topmost inside
tabbed/stacked container. This is changed in border.c
Previously, cmd_kill only closed a focused view, while containers were
not affected. Now it closes all views that are children of the focused
container.
Whenever a stacked or tabbed container has focused, paint the titlebars of all
its child windows to be focused as well to indicate the parent stack/tab
container has the focus.
In `move_focus()`, when given an output, set the focus to the workspace of that
output instead of the output itself.
This fixes a bug that did not allow users to switch between outputs introduced
in afc6ad6.
It also fixes other issues before that commit when a workspace with children
was selected and the user tried to switch focus in the direction of another
output.
In the `focus parent` command, do not set focus above the workspace level.
These containers are not meant to be focused.
This prevents a crash on repeated `focus parent` commands.
