feat: support cursor-shape-v1 protocol (#2852)

* feat: support cursor-shape-v1 protocol

* fix code style

Author: akliuxingyuan

proto/meson.build

@@ -32,6 +32,7 @@ server_protocols = [
     [wl_protocol_dir, 'unstable/input-method/input-method-unstable-v1.xml'],
     [wl_protocol_dir, 'staging/ext-session-lock/ext-session-lock-v1.xml'],
     [wl_protocol_dir, 'unstable/text-input/text-input-unstable-v1.xml'],
+    [wl_protocol_dir, 'staging/cursor-shape/cursor-shape-v1.xml'],
     'wayfire-shell-unstable-v2.xml',
     'gtk-shell.xml',
     'wlr-layer-shell-unstable-v1.xml',

src/api/wayfire/nonstd/wlroots-full.hpp

@@ -155,6 +155,9 @@ extern "C"
 #include <wlr/types/wlr_fractional_scale_v1.h>
 #include <wlr/types/wlr_single_pixel_buffer_v1.h>
 #include <wlr/types/wlr_session_lock_v1.h>
+#if  __has_include(<cursor-shape-v1-protocol.h>)
+    #include <wlr/types/wlr_cursor_shape_v1.h>
+#endif
 
 // Activation plugin
 #include <wlr/types/wlr_xdg_activation_v1.h>

src/api/wayfire/nonstd/wlroots.hpp

@@ -39,6 +39,7 @@ extern "C"
     struct wlr_primary_selection_v1_device_manager;
     struct wlr_drm_lease_v1_manager;
     struct wlr_session_lock_manager_v1;
+    struct wlr_cursor_shape_manager_v1;
 
     struct wlr_xdg_foreign_v1;
     struct wlr_xdg_foreign_v2;

src/core/seat/cursor.cpp

@@ -19,6 +19,7 @@ wf::cursor_t::cursor_t(wf::seat_t *seat)
     wlr_cursor_map_to_output(cursor, NULL);
     wlr_cursor_warp(cursor, NULL, cursor->x, cursor->y);
     init_xcursor();
+    init_cursor_shape_manager();
 
     config_reloaded = [=] (auto)
     {
@@ -128,14 +129,46 @@ void wf::cursor_t::init_xcursor()
     set_cursor("default");
 }
 
-void wf::cursor_t::set_cursor(std::string name)
+bool wf::cursor_t::can_client_set_cursor()
 {
+    if (this->touchscreen_mode_active)
+    {
+        return false;
+    }
+
     if (this->hide_ref_counter)
     {
-        return;
+        return false;
     }
 
-    if (this->touchscreen_mode_active)
+    return true;
+}
+
+void wf::cursor_t::init_cursor_shape_manager()
+{
+    cursor_shape_manager = wlr_cursor_shape_manager_v1_create(seat->seat->display, 1);
+    request_set_cursor_shape.set_callback([&] (void *data)
+    {
+        auto event = (wlr_cursor_shape_manager_v1_request_set_shape_event*)data;
+        const char *shape_name = wlr_cursor_shape_v1_name(event->shape);
+        struct wlr_seat_client *focused_client = seat->seat->pointer_state.focused_client;
+
+        if (focused_client != event->seat_client)
+        {
+            return;
+        }
+
+        if (can_client_set_cursor())
+        {
+            wlr_cursor_set_xcursor(cursor, xcursor, shape_name);
+        }
+    });
+    request_set_cursor_shape.connect(&cursor_shape_manager->events.request_set_shape);
+}
+
+void wf::cursor_t::set_cursor(std::string name)
+{
+    if (!can_client_set_cursor())
     {
         return;
     }
@@ -189,12 +222,7 @@ wf::pointf_t wf::cursor_t::get_cursor_position()
 void wf::cursor_t::set_cursor(
     wlr_seat_pointer_request_set_cursor_event *ev, bool validate_request)
 {
-    if (this->hide_ref_counter)
-    {
-        return;
-    }
-
-    if (this->touchscreen_mode_active)
+    if (!can_client_set_cursor())
     {
         return;
     }

src/core/seat/cursor.hpp

@@ -26,6 +26,7 @@ struct cursor_t
     void set_cursor(wlr_seat_pointer_request_set_cursor_event *ev,
         bool validate_request);
     void set_cursor(std::string name);
+    bool can_client_set_cursor();
     void unhide_cursor();
     void hide_cursor();
     int hide_ref_counter = 0;
@@ -48,6 +49,7 @@ struct cursor_t
     wf::pointf_t get_cursor_position();
 
     void init_xcursor();
+    void init_cursor_shape_manager();
     void setup_listeners();
 
     // Device event listeners
@@ -63,12 +65,14 @@ struct cursor_t
 
     // Seat events
     wf::wl_listener_wrapper request_set_cursor;
+    wf::wl_listener_wrapper request_set_cursor_shape;
 
     wf::signal::connection_t<wf::reload_config_signal> config_reloaded;
     wf::seat_t *seat;
 
     wlr_cursor *cursor = NULL;
     wlr_xcursor_manager *xcursor = NULL;
+    wlr_cursor_shape_manager_v1 *cursor_shape_manager = NULL;
 
     std::string last_cursor_name;