[feat] add focusing and better dragging.

2 files changed, 36 insertions, 0 deletions

diff --git a/rt/include/util.h b/rt/include/util.h
index b477113..a9c290d 100644
--- a/rt/include/util.h
+++ b/rt/include/util.h
@@ -9,5 +9,6 @@
 void *montis_plugin_toplevel_at(void *ctx, double lx, double ly);
 void montis_plugin_get_toplevel_position(void *toplevel, double *x, double *y);
 void montis_plugin_set_toplevel_position(void *toplevel, double x, double y);
+void montis_plugin_focus_toplevel(void *toplevel);
 
 #endif /* MONTIS_UTIL_H */
diff --git a/rt/src/util.c b/rt/src/util.c
index 6576770..66a2b20 100644
--- a/rt/src/util.c
+++ b/rt/src/util.c
@@ -2,6 +2,7 @@
 #include "wl.h"
 
 #include <wlr/types/wlr_scene.h>
+#include <wlr/types/wlr_xdg_shell.h>
 
 static struct montis_server *server_from_ctx(void *ctx)
 {
@@ -61,3 +62,37 @@ void montis_plugin_set_toplevel_position(void *toplevel, double x, double y)
   struct montis_toplevel *tl = toplevel;
   wlr_scene_node_set_position(&tl->scene_tree->node, (int)x, (int)y);
 }
+
+void montis_plugin_focus_toplevel(void *toplevel)
+{
+  if (!toplevel) {
+    return;
+  }
+  struct montis_toplevel *tl = toplevel;
+  struct montis_server *server = tl->server;
+  struct wlr_seat *seat = server->seat;
+  struct wlr_surface *surface = tl->xdg_toplevel->base->surface;
+  struct wlr_surface *prev_surface = seat->keyboard_state.focused_surface;
+
+  if (prev_surface == surface) {
+    return;
+  }
+  if (prev_surface) {
+    struct wlr_xdg_toplevel *prev_toplevel =
+        wlr_xdg_toplevel_try_from_wlr_surface(prev_surface);
+    if (prev_toplevel != NULL) {
+      wlr_xdg_toplevel_set_activated(prev_toplevel, false);
+    }
+  }
+
+  struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat);
+  wlr_scene_node_raise_to_top(&tl->scene_tree->node);
+  wl_list_remove(&tl->link);
+  wl_list_insert(&server->toplevels, &tl->link);
+  wlr_xdg_toplevel_set_activated(tl->xdg_toplevel, true);
+  if (keyboard != NULL) {
+    wlr_seat_keyboard_notify_enter(seat, surface, keyboard->keycodes,
+                                   keyboard->num_keycodes,
+                                   &keyboard->modifiers);
+  }
+}