1 files changed, 133 insertions, 0 deletions
diff --git a/erebor/src/util.c b/erebor/src/util.c
new file mode 100644
index 0000000..e09cff9
--- /dev/null
+++ b/erebor/src/util.c
@@ -0,0 +1,133 @@
+#include "util.h"
+#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)
+{
+  struct montis_server *server = wl_container_of(ctx, server, plugin);
+  return server;
+}
+
+static struct montis_toplevel *toplevel_at(struct montis_server *server,
+                                           double lx, double ly)
+{
+  double sx = 0.0;
+  double sy = 0.0;
+
+  struct wlr_scene_node *node =
+      wlr_scene_node_at(&server->scene->tree.node, lx, ly, &sx, &sy);
+  if (node == NULL || node->type != WLR_SCENE_NODE_BUFFER) {
+    return NULL;
+  }
+  struct wlr_scene_buffer *scene_buffer = wlr_scene_buffer_from_node(node);
+  struct wlr_scene_surface *scene_surface =
+      wlr_scene_surface_try_from_buffer(scene_buffer);
+  if (!scene_surface) {
+    return NULL;
+  }
+
+  struct wlr_scene_tree *tree = node->parent;
+  while (tree != NULL && tree->node.data == NULL) {
+    tree = tree->node.parent;
+  }
+  return tree ? tree->node.data : NULL;
+}
+
+void *montis_plugin_toplevel_at(void *ctx, double lx, double ly)
+{
+  if (!ctx) {
+    return NULL;
+  }
+  struct montis_server *server = server_from_ctx(ctx);
+  return toplevel_at(server, lx, ly);
+}
+
+void montis_plugin_get_toplevel_position(void *toplevel, double *x, double *y)
+{
+  if (!toplevel || !x || !y) {
+    return;
+  }
+  struct montis_toplevel *tl = toplevel;
+  *x = tl->scene_tree->node.x;
+  *y = tl->scene_tree->node.y;
+}
+
+void montis_plugin_set_toplevel_position(void *toplevel, double x, double y)
+{
+  if (!toplevel) {
+    return;
+  }
+  struct montis_toplevel *tl = toplevel;
+  wlr_scene_node_set_position(&tl->scene_tree->node, (int)x, (int)y);
+}
+
+void montis_plugin_get_toplevel_geometry(void *toplevel, double *x, double *y,
+                                         double *w, double *h)
+{
+  if (!toplevel || !x || !y || !w || !h) {
+    return;
+  }
+  struct montis_toplevel *tl = toplevel;
+  struct wlr_box geo_box;
+  wlr_xdg_surface_get_geometry(tl->xdg_toplevel->base, &geo_box);
+  *x = tl->scene_tree->node.x;
+  *y = tl->scene_tree->node.y;
+  *w = geo_box.width;
+  *h = geo_box.height;
+}
+
+void montis_plugin_set_toplevel_geometry(void *toplevel, double x, double y,
+                                         double w, double h)
+{
+  if (!toplevel) {
+    return;
+  }
+  struct montis_toplevel *tl = toplevel;
+  wlr_scene_node_set_position(&tl->scene_tree->node, (int)x, (int)y);
+  wlr_xdg_toplevel_set_size(tl->xdg_toplevel, (int)w, (int)h);
+}
+
+void montis_plugin_warp_cursor(void *ctx, double lx, double ly)
+{
+  if (!ctx) {
+    return;
+  }
+  struct montis_server *server = server_from_ctx(ctx);
+  wlr_cursor_warp(server->cursor, NULL, lx, ly);
+}
+
+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);
+  }
+}