1 files changed, 68 insertions, 0 deletions
diff --git a/src/xdg_shell.zig b/src/xdg_shell.zig
new file mode 100644
index 0000000..3bcc736
--- /dev/null
+++ b/src/xdg_shell.zig
@@ -0,0 +1,68 @@
+const std = @import("std");
+const c = @import("c.zig").c;
+
+fn xdg_surface_map(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
+    // Called when the surface is mapped, or ready to display on-screen.
+    var view = @fieldParentPtr(View, "map", listener);
+    view.*.mapped = true;
+    focus_view(view, view.*.xdg_surface.*.surface);
+}
+
+fn xdg_surface_unmap(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
+    var view = @fieldParentPtr(View, "unmap", listener);
+    view.*.mapped = false;
+}
+
+fn xdg_surface_destroy(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
+    var view = @fieldParentPtr(View, "destroy", listener);
+    var server = view.*.server;
+    const idx = for (server.*.views.span()) |*v, i| {
+        if (v == view) {
+            break i;
+        }
+    } else return;
+    _ = server.*.views.orderedRemove(idx);
+}
+
+fn xdg_toplevel_request_move(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
+    // ignore for now
+}
+
+fn xdg_toplevel_request_resize(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
+    // ignore for now
+}
+
+fn server_new_xdg_surface(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
+    // This event is raised when wlr_xdg_shell receives a new xdg surface from a
+    // client, either a toplevel (application window) or popup.
+    var server = @fieldParentPtr(Server, "new_xdg_surface", listener);
+    var xdg_surface = @ptrCast(*c.wlr_xdg_surface, @alignCast(@alignOf(*c.wlr_xdg_surface), data));
+
+    if (xdg_surface.*.role != c.enum_wlr_xdg_surface_role.WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+        return;
+    }
+
+    // Allocate a View for this surface
+    server.*.views.append(undefined) catch unreachable;
+    var view = &server.*.views.span()[server.*.views.span().len - 1];
+
+    view.*.server = server;
+    view.*.xdg_surface = xdg_surface;
+
+    // Listen to the various events it can emit
+    view.*.map.notify = xdg_surface_map;
+    c.wl_signal_add(&xdg_surface.*.events.map, &view.*.map);
+
+    view.*.unmap.notify = xdg_surface_unmap;
+    c.wl_signal_add(&xdg_surface.*.events.unmap, &view.*.unmap);
+
+    view.*.destroy.notify = xdg_surface_destroy;
+    c.wl_signal_add(&xdg_surface.*.events.destroy, &view.*.destroy);
+
+    var toplevel = xdg_surface.*.unnamed_160.toplevel;
+    view.*.request_move.notify = xdg_toplevel_request_move;
+    c.wl_signal_add(&toplevel.*.events.request_move, &view.*.request_move);
+
+    view.*.request_resize.notify = xdg_toplevel_request_resize;
+    c.wl_signal_add(&toplevel.*.events.request_resize, &view.*.request_resize);
+}