Add CSD to border modes

This replaces view.using_csd with a new border mode: B_CSD. This also
removes sway_xdg_shell{_v6}_view.deco_mode and
view->has_client_side_decorations as we can now get these from the
border.

You can use `border toggle` to cycle through the modes including CSD, or
use `border csd` to set it directly. The client must support the
xdg-decoration protocol, and the only client I know of that does is the
example in wlroots.

If the client switches from SSD to CSD without us expecting it (via the
server-decoration protocol), we stash the previous border type into
view.saved_border so we can restore it if the client returns to SSD. I
haven't found a way to test this though.

1 files changed, 0 insertions, 1 deletions

diff --git a/sway/desktop/transaction.c b/sway/desktop/transaction.c
index 797f6b4c..4624d824 100644
--- a/sway/desktop/transaction.c
+++ b/sway/desktop/transaction.c
@@ -167,7 +167,6 @@ static void copy_container_state(struct sway_container *container,
                 state->border_left = view->border_left;
                 state->border_right = view->border_right;
                 state->border_bottom = view->border_bottom;
-                state->using_csd = view->using_csd;
         } else {
                 state->children = create_list();
                 list_cat(state->children, container->children);