This does two important things when using alpha:
1. At corners, borders don't double in opacity
2. Foreground elements (text) can be made transparent and you can see
fully through to the wallpaper
Indicator border color is now used only when a container is the only
child. Reason for the change? i3 does it this way. Sway container
borders are now a bit more similar to i3 ones.
This is a feature that can't work the same as i3, because there is no
real window classes in wayland. This way, we avoid null titles as much
as possible.
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.
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
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.
This patch makes sure to clear the border buffer of fullscreen view so
the border doesn't get drawn behind a fullscreen view, which would be
visible if the view was transparent.
The borders are implemented as a surface/buffer attached to each view
which is sent to and rendered by wlc in the view_pre_render callback.
All the drawing logic is handled in sway/border.c and all the logic for
calculating the geometry of the border/view is handled in
`update_geometry` in sway/layout.c (same place as gaps are calculated).
Drew DeVault
D.B
Nicolas Cornu
Drew DeVault
Guillaume Brogi
Tony Crisci
Jasen Borisov
Mikkel Oscar Lyderik
Mykyta Holubakha
Chang Liu
Kevin Hamacher
crondog
Kevin Hamacher