From 56b374b5699bf1ba77744c7019fa658dcd1fe3b3 Mon Sep 17 00:00:00 2001
From: spacepineapple24 <spacepineapple24@noreply.codeberg.org>
Date: Mon, 24 Mar 2025 18:28:04 +0000
Subject: [PATCH] Implement wp_cursor_shape_v1

---
 bar/meson.build |  9 ++++++++-
 bar/wayland.c   | 47 +++++++++++++++++++++++++++++++++++++++++++++--
 meson.build     |  4 ++++
 3 files changed, 57 insertions(+), 3 deletions(-)

diff --git a/bar/meson.build b/bar/meson.build
index 6ca5ec9..9163c79 100644
--- a/bar/meson.build
+++ b/bar/meson.build
@@ -15,11 +15,18 @@ if backend_wayland
 
   wl_proto_headers = []
   wl_proto_src = []
-  foreach prot : [
+  wl_proto_xml = [
     '../external/wlr-layer-shell-unstable-v1.xml',
     wayland_protocols_datadir + '/stable/xdg-shell/xdg-shell.xml',
     wayland_protocols_datadir + '/unstable/xdg-output/xdg-output-unstable-v1.xml']
 
+    if wayland_protocols.version().version_compare('>=1.32')
+      wl_proto_xml += [
+        wayland_protocols_datadir + '/staging/cursor-shape/cursor-shape-v1.xml',
+        wayland_protocols_datadir + '/unstable/tablet/tablet-unstable-v2.xml']
+    endif
+
+    foreach prot : wl_proto_xml
     wl_proto_headers += custom_target(
       prot.underscorify() + '-client-header',
       output: '@BASENAME@.h',
diff --git a/bar/wayland.c b/bar/wayland.c
index 86ab252..4b31e01 100644
--- a/bar/wayland.c
+++ b/bar/wayland.c
@@ -21,6 +21,10 @@
 #include <wlr-layer-shell-unstable-v1.h>
 #include <xdg-output-unstable-v1.h>
 
+#ifdef HAVE_CURSOR_SHAPE
+#include <cursor-shape-v1.h>
+#endif
+
 #define LOG_MODULE "bar:wayland"
 #define LOG_ENABLE_DBG 0
 #include "../log.h"
@@ -107,6 +111,10 @@ struct wayland_backend {
 
     struct zxdg_output_manager_v1 *xdg_output_manager;
 
+#ifdef HAVE_CURSOR_SHAPE
+    struct wp_cursor_shape_manager_v1 *cursor_shape_manager;
+#endif
+
     /* TODO: set directly in bar instead */
     int width, height;
 
@@ -145,6 +153,23 @@ seat_destroy(struct seat *seat)
         wl_seat_release(seat->seat);
 }
 
+static bool attempt_cursor_shape(struct wayland_backend *wayl, struct wl_pointer *wl_pointer,
+                                 uint32_t serial) {
+#ifdef HAVE_CURSOR_SHAPE
+    if (wayl->cursor_shape_manager) {
+        struct wp_cursor_shape_device_v1 *device =
+            wp_cursor_shape_manager_v1_get_pointer(
+                wayl->cursor_shape_manager, wl_pointer);
+        wp_cursor_shape_device_v1_set_shape(device, serial,
+            WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DEFAULT);
+        wp_cursor_shape_device_v1_destroy(device);
+        return true;
+    }
+#endif
+
+    return false;
+}
+
 void *
 bar_backend_wayland_new(void)
 {
@@ -235,8 +260,11 @@ wl_pointer_enter(void *data, struct wl_pointer *wl_pointer, uint32_t serial, str
     seat->pointer.y = wl_fixed_to_int(surface_y) * backend->scale;
 
     backend->active_seat = seat;
-    reload_cursor_theme(seat, backend->monitor->scale);
-    update_cursor_surface(backend, seat);
+
+    if (!attempt_cursor_shape(backend, wl_pointer, serial)) {
+        reload_cursor_theme(seat, backend->monitor->scale);
+        update_cursor_surface(backend, seat);
+    }
 }
 
 static void
@@ -678,6 +706,16 @@ handle_global(void *data, struct wl_registry *registry, uint32_t name, const cha
 
         backend->xdg_output_manager = wl_registry_bind(registry, name, &zxdg_output_manager_v1_interface, required);
     }
+#ifdef HAVE_CURSOR_SHAPE
+    else if (strcmp(interface, wp_cursor_shape_manager_v1_interface.name) == 0) {
+        const uint32_t required = 1;
+        if (!verify_iface_version(interface, version, required))
+            return;
+
+        backend->cursor_shape_manager = wl_registry_bind(
+        backend->registry, name, &wp_cursor_shape_manager_v1_interface, required);
+    }
+#endif
 }
 
 static void
@@ -1146,6 +1184,11 @@ cleanup(struct bar *_bar)
     if (backend->xdg_output_manager != NULL)
         zxdg_output_manager_v1_destroy(backend->xdg_output_manager);
 
+#ifdef HAVE_CURSOR_SHAPE
+    if (backend->cursor_shape_manager != NULL)
+        wp_cursor_shape_manager_v1_destroy(backend->cursor_shape_manager);
+#endif
+
     tll_foreach(backend->seats, it) seat_destroy(&it->item);
     tll_free(backend->seats);
 
diff --git a/meson.build b/meson.build
index 67d3096..97654c8 100644
--- a/meson.build
+++ b/meson.build
@@ -71,7 +71,11 @@ backend_x11 = xcb_aux.found() and xcb_cursor.found() and xcb_event.found() and \
 # Wayland dependencies
 wayland_client = dependency('wayland-client', required: get_option('backend-wayland'))
 wayland_cursor = dependency('wayland-cursor', required: get_option('backend-wayland'))
+wayland_protocols = dependency('wayland-protocols', required: get_option('backend-wayland'))
 backend_wayland = wayland_client.found() and wayland_cursor.found()
+if backend_wayland and wayland_protocols.version().version_compare('>=1.32')
+    add_project_arguments('-DHAVE_CURSOR_SHAPE=1', language: 'c')
+endif
 
 # "My" dependencies, fallback to subproject
 tllist = dependency('tllist', version: '>=1.0.1', fallback: 'tllist')