Implement DisplayServer.beep.

doc/classes/DisplayServer.xml

@@ -10,6 +10,13 @@
 	<tutorials>
 	</tutorials>
 	<methods>
+		<method name="beep" qualifiers="const">
+			<return type="void" />
+			<description>
+				Plays the beep sound from the operative system, if possible. Because it comes from the OS, the beep sound will be audible even if the application is muted. It may also be disabled for the entire OS by the user.
+				[b]Note:[/b] This method is implemented on macOS, Linux (X11/Wayland), and Windows.
+			</description>
+		</method>
 		<method name="clipboard_get" qualifiers="const">
 			<return type="String" />
 			<description>

platform/linuxbsd/wayland/SCsub

@@ -172,11 +172,22 @@ env.WAYLAND_API_CODE(
     source="#thirdparty/wayland-protocols/unstable/xdg-foreign/xdg-foreign-unstable-v1.xml",
 )
 
+env.WAYLAND_API_HEADER(
+    target="protocol/xdg_system_bell.gen.h",
+    source="#thirdparty/wayland-protocols/staging/xdg-system-bell/xdg-system-bell-v1.xml",
+)
+
+env.WAYLAND_API_CODE(
+    target="protocol/xdg_system_bell.gen.c",
+    source="#thirdparty/wayland-protocols/staging/xdg-system-bell/xdg-system-bell-v1.xml",
+)
+
 source_files = [
     "protocol/wayland.gen.c",
     "protocol/viewporter.gen.c",
     "protocol/fractional_scale.gen.c",
     "protocol/xdg_shell.gen.c",
+    "protocol/xdg_system_bell.gen.c",
     "protocol/xdg_foreign.gen.c",
     "protocol/xdg_decoration.gen.c",
     "protocol/xdg_activation.gen.c",

platform/linuxbsd/wayland/display_server_wayland.cpp

@@ -319,6 +319,10 @@ Error DisplayServerWayland::file_dialog_with_options_show(const String &p_title,
 
 #endif
 
+void DisplayServerWayland::beep() const {
+	wayland_thread.beep();
+}
+
 void DisplayServerWayland::mouse_set_mode(MouseMode p_mode) {
 	if (p_mode == mouse_mode) {
 		return;

platform/linuxbsd/wayland/display_server_wayland.h

@@ -181,6 +181,8 @@ class DisplayServerWayland : public DisplayServer {
 	virtual Error file_dialog_with_options_show(const String &p_title, const String &p_current_directory, const String &p_root, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const TypedArray<Dictionary> &p_options, const Callable &p_callback) override;
 #endif
 
+	virtual void beep() const override;
+
 	virtual void mouse_set_mode(MouseMode p_mode) override;
 	virtual MouseMode mouse_get_mode() const override;
 

platform/linuxbsd/wayland/wayland_thread.cpp

@@ -497,6 +497,12 @@ void WaylandThread::_wl_registry_on_global(void *data, struct wl_registry *wl_re
 		return;
 	}
 
+	if (strcmp(interface, xdg_system_bell_v1_interface.name) == 0) {
+		registry->xdg_system_bell = (struct xdg_system_bell_v1 *)wl_registry_bind(wl_registry, name, &xdg_system_bell_v1_interface, 1);
+		registry->xdg_system_bell_name = name;
+		return;
+	}
+
 	if (strcmp(interface, xdg_activation_v1_interface.name) == 0) {
 		registry->xdg_activation = (struct xdg_activation_v1 *)wl_registry_bind(wl_registry, name, &xdg_activation_v1_interface, 1);
 		registry->xdg_activation_name = name;
@@ -692,6 +698,17 @@ void WaylandThread::_wl_registry_on_global_remove(void *data, struct wl_registry
 		return;
 	}
 
+	if (name == registry->xdg_system_bell_name) {
+		if (registry->xdg_system_bell) {
+			xdg_system_bell_v1_destroy(registry->xdg_system_bell);
+			registry->xdg_system_bell = nullptr;
+		}
+
+		registry->xdg_system_bell_name = 0;
+
+		return;
+	}
+
 	if (name == registry->xdg_activation_name) {
 		if (registry->xdg_activation) {
 			xdg_activation_v1_destroy(registry->xdg_activation);
@@ -3282,6 +3299,12 @@ struct wl_surface *WaylandThread::window_get_wl_surface(DisplayServer::WindowID
 	return ws.wl_surface;
 }
 
+void WaylandThread::beep() const {
+	if (registry.xdg_system_bell) {
+		xdg_system_bell_v1_ring(registry.xdg_system_bell, nullptr);
+	}
+}
+
 void WaylandThread::window_set_max_size(DisplayServer::WindowID p_window_id, const Size2i &p_size) {
 	// TODO: Use window IDs for multiwindow support.
 	WindowState &ws = main_window;
@@ -4364,6 +4387,10 @@ void WaylandThread::destroy() {
 		xdg_activation_v1_destroy(registry.xdg_activation);
 	}
 
+	if (registry.xdg_system_bell) {
+		xdg_system_bell_v1_destroy(registry.xdg_system_bell);
+	}
+
 	if (registry.xdg_decoration_manager) {
 		zxdg_decoration_manager_v1_destroy(registry.xdg_decoration_manager);
 	}

platform/linuxbsd/wayland/wayland_thread.h

@@ -69,6 +69,7 @@
 #include "wayland/protocol/xdg_decoration.gen.h"
 #include "wayland/protocol/xdg_foreign.gen.h"
 #include "wayland/protocol/xdg_shell.gen.h"
+#include "wayland/protocol/xdg_system_bell.gen.h"
 
 #ifdef LIBDECOR_ENABLED
 #ifdef SOWRAP_ENABLED
@@ -162,6 +163,9 @@ class WaylandThread {
 		struct zxdg_decoration_manager_v1 *xdg_decoration_manager = nullptr;
 		uint32_t xdg_decoration_manager_name = 0;
 
+		struct xdg_system_bell_v1 *xdg_system_bell = nullptr;
+		uint32_t xdg_system_bell_name = 0;
+
 		struct xdg_activation_v1 *xdg_activation = nullptr;
 		uint32_t xdg_activation_name = 0;
 
@@ -926,6 +930,8 @@ class WaylandThread {
 	bool has_message();
 	Ref<Message> pop_message();
 
+	void beep() const;
+
 	void window_create(DisplayServer::WindowID p_window_id, int p_width, int p_height);
 
 	struct wl_surface *window_get_wl_surface(DisplayServer::WindowID p_window_id) const;

platform/linuxbsd/x11/display_server_x11.cpp

@@ -400,6 +400,10 @@ Error DisplayServerX11::file_dialog_with_options_show(const String &p_title, con
 
 #endif
 
+void DisplayServerX11::beep() const {
+	XBell(x11_display, 0);
+}
+
 void DisplayServerX11::mouse_set_mode(MouseMode p_mode) {
 	_THREAD_SAFE_METHOD_
 

platform/linuxbsd/x11/display_server_x11.h

@@ -406,6 +406,8 @@ class DisplayServerX11 : public DisplayServer {
 	virtual Error file_dialog_with_options_show(const String &p_title, const String &p_current_directory, const String &p_root, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const TypedArray<Dictionary> &p_options, const Callable &p_callback) override;
 #endif
 
+	virtual void beep() const override;
+
 	virtual void mouse_set_mode(MouseMode p_mode) override;
 	virtual MouseMode mouse_get_mode() const override;
 

platform/macos/display_server_macos.h

@@ -298,6 +298,8 @@ class DisplayServerMacOS : public DisplayServer {
 	virtual Error file_dialog_show(const String &p_title, const String &p_current_directory, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const Callable &p_callback) override;
 	virtual Error file_dialog_with_options_show(const String &p_title, const String &p_current_directory, const String &p_root, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const TypedArray<Dictionary> &p_options, const Callable &p_callback) override;
 
+	virtual void beep() const override;
+
 	virtual void mouse_set_mode(MouseMode p_mode) override;
 	virtual MouseMode mouse_get_mode() const override;
 

platform/macos/display_server_macos.mm

@@ -1200,6 +1200,10 @@
 	return OK;
 }
 
+void DisplayServerMacOS::beep() const {
+	NSBeep();
+}
+
 Error DisplayServerMacOS::dialog_input_text(String p_title, String p_description, String p_partial, const Callable &p_callback) {
 	_THREAD_SAFE_METHOD_
 

platform/windows/display_server_windows.cpp

@@ -786,6 +786,10 @@ void DisplayServerWindows::process_file_dialog_callbacks() {
 	}
 }
 
+void DisplayServerWindows::beep() const {
+	MessageBeep(MB_OK);
+}
+
 void DisplayServerWindows::mouse_set_mode(MouseMode p_mode) {
 	_THREAD_SAFE_METHOD_
 

platform/windows/display_server_windows.h

@@ -689,6 +689,8 @@ class DisplayServerWindows : public DisplayServer {
 	virtual Error file_dialog_show(const String &p_title, const String &p_current_directory, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const Callable &p_callback) override;
 	virtual Error file_dialog_with_options_show(const String &p_title, const String &p_current_directory, const String &p_root, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const TypedArray<Dictionary> &p_options, const Callable &p_callback) override;
 
+	virtual void beep() const override;
+
 	virtual void mouse_set_mode(MouseMode p_mode) override;
 	virtual MouseMode mouse_get_mode() const override;
 

servers/display_server.cpp

@@ -677,6 +677,9 @@ Error DisplayServer::file_dialog_with_options_show(const String &p_title, const
 	return ERR_UNAVAILABLE;
 }
 
+void DisplayServer::beep() const {
+}
+
 int DisplayServer::keyboard_get_layout_count() const {
 	return 0;
 }
@@ -998,6 +1001,8 @@ void DisplayServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("file_dialog_show", "title", "current_directory", "filename", "show_hidden", "mode", "filters", "callback"), &DisplayServer::file_dialog_show);
 	ClassDB::bind_method(D_METHOD("file_dialog_with_options_show", "title", "current_directory", "root", "filename", "show_hidden", "mode", "filters", "options", "callback"), &DisplayServer::file_dialog_with_options_show);
 
+	ClassDB::bind_method(D_METHOD("beep"), &DisplayServer::beep);
+
 	ClassDB::bind_method(D_METHOD("keyboard_get_layout_count"), &DisplayServer::keyboard_get_layout_count);
 	ClassDB::bind_method(D_METHOD("keyboard_get_current_layout"), &DisplayServer::keyboard_get_current_layout);
 	ClassDB::bind_method(D_METHOD("keyboard_set_current_layout", "index"), &DisplayServer::keyboard_set_current_layout);

servers/display_server.h

@@ -560,6 +560,8 @@ class DisplayServer : public Object {
 	virtual Error file_dialog_show(const String &p_title, const String &p_current_directory, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const Callable &p_callback);
 	virtual Error file_dialog_with_options_show(const String &p_title, const String &p_current_directory, const String &p_root, const String &p_filename, bool p_show_hidden, FileDialogMode p_mode, const Vector<String> &p_filters, const TypedArray<Dictionary> &p_options, const Callable &p_callback);
 
+	virtual void beep() const;
+
 	virtual int keyboard_get_layout_count() const;
 	virtual int keyboard_get_current_layout() const;
 	virtual void keyboard_set_current_layout(int p_index);

thirdparty/README.md

@@ -1026,6 +1026,7 @@ Files extracted from upstream source:
 - `staging/fractional-scale/fractional-scale-v1.xml`
 - `staging/xdg-activation/README`
 - `staging/xdg-activation/xdg-activation-v1.xml`
+- `staging/xdg-system-bell/xdg-system-bell-v1.xml`
 - `unstable/idle-inhibit/README`
 - `unstable/idle-inhibit/idle-inhibit-unstable-v1.xml`
 - `unstable/pointer-constraints/README`

thirdparty/wayland-protocols/staging/xdg-system-bell/README

@@ -0,0 +1,5 @@
+system_bell protocol
+
+Maintainers:
+Jonas Ådahl <[email protected]>
+Carlos Garnacho <[email protected]>

thirdparty/wayland-protocols/staging/xdg-system-bell/xdg-system-bell-v1.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="xdg_system_bell_v1">
+  <copyright>
+    Copyright © 2016, 2023 Red Hat
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
+  <interface name="xdg_system_bell_v1" version="1">
+    <description summary="system bell">
+      This global interface enables clients to ring the system bell.
+
+      Warning! The protocol described in this file is currently in the testing
+      phase. Backward compatible changes may be added together with the
+      corresponding interface version bump. Backward incompatible changes can
+      only be done by creating a new major version of the extension.
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the system bell object">
+	Notify that the object will no longer be used.
+      </description>
+    </request>
+
+    <request name="ring">
+      <description summary="ring the system bell">
+	This requests rings the system bell on behalf of a client. How ringing
+	the bell is implemented is up to the compositor. It may be an audible
+	sound, a visual feedback of some kind, or any other thing including
+	nothing.
+
+        The passed surface should correspond to a toplevel like surface role,
+        or be null, meaning the client doesn't have a particular toplevel it
+        wants to associate the bell ringing with. See the xdg-shell protocol
+        extension for a toplevel like surface role.
+      </description>
+      <arg name="surface" type="object" interface="wl_surface"
+	   allow-null="true" summary="associated surface"/>
+    </request>
+  </interface>
+</protocol>