sdl3: disable the "accent menu" on macOS

For some reason SDL3 made a change to enable a system menu offering
to input a letter with diacritics, which appears whenever you press
and hold a key (for example while running). After SDL does this,
call the same Objective C facility to undo the configuration change
that SDL did.

Author: slipher

src.cmake

@@ -356,6 +356,10 @@ set(CLIENTLIST
     ${RENDERERLIST}
 )
 
+if (APPLE)
+    set(CLIENTLIST ${CLIENTLIST} ${ENGINE_DIR}/sys/DisableAccentMenu.m)
+endif()
+
 set(CLIENTTESTLIST ${ENGINETESTLIST}
     ${ENGINE_DIR}/renderer/gl_shader_test.cpp
 )

src/engine/sys/DisableAccentMenu.m

@@ -0,0 +1,38 @@
+/*
+===========================================================================
+Daemon BSD Source Code
+Copyright (c) 2025, Daemon Developers
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the Daemon developers nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL DAEMON DEVELOPERS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+===========================================================================
+*/
+
+#import <Foundation/Foundation.h>
+
+void DisableAccentMenu() {
+    // Don't do this: https://forums.factorio.com/download/file.php?id=46540
+    NSDictionary *appDefaults = [[NSDictionary alloc] initWithObjectsAndKeys:
+        [NSNumber numberWithBool:NO], @"ApplePressAndHoldEnabled", nil];
+    [[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults];
+}

src/engine/sys/sdl_input.cpp

@@ -1298,6 +1298,9 @@ void IN_FrameEnd()
 IN_Init
 ===============
 */
+#ifdef __APPLE__
+extern "C" void DisableAccentMenu();
+#endif
 void IN_Init( void *windowData )
 {
 	int appState;
@@ -1328,6 +1331,13 @@ void IN_Init( void *windowData )
 	Cvar_SetValue( "com_unfocused", !( appState & SDL_WINDOW_INPUT_FOCUS ) );
 	Cvar_SetValue( "com_minimized", ( appState & SDL_WINDOW_MINIMIZED ) );
 	IN_InitJoystick();
+
+#ifdef __APPLE__
+	// We have to act after SDL does. Whoever has the last word wins!
+	// https://github.com/libsdl-org/SDL/commit/caf0348b26d02bc22ba9a0a908c83c43f8e4e6ad
+	DisableAccentMenu();
+#endif
+
 	Log::Debug( "------------------------------------" );
 }