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, 9 insertions, 0 deletions

diff --git a/sway/server.c b/sway/server.c
index bed5aed1..63bfa7e1 100644
--- a/sway/server.c
+++ b/sway/server.c
@@ -16,6 +16,7 @@
 #include <wlr/types/wlr_screencopy_v1.h>
 #include <wlr/types/wlr_server_decoration.h>
 #include <wlr/types/wlr_xcursor_manager.h>
+#include <wlr/types/wlr_xdg_decoration_v1.h>
 #include <wlr/types/wlr_xdg_output_v1.h>
 #include <wlr/util/log.h>
 #include "list.h"
@@ -115,6 +116,14 @@ bool server_init(struct sway_server *server) {
         server->server_decoration.notify = handle_server_decoration;
         wl_list_init(&server->decorations);
 
+        server->xdg_decoration_manager =
+                wlr_xdg_decoration_manager_v1_create(server->wl_display);
+        wl_signal_add(
+                        &server->xdg_decoration_manager->events.new_toplevel_decoration,
+                        &server->xdg_decoration);
+        server->xdg_decoration.notify = handle_xdg_decoration;
+        wl_list_init(&server->xdg_decorations);
+
         wlr_export_dmabuf_manager_v1_create(server->wl_display);
         wlr_screencopy_manager_v1_create(server->wl_display);