SDL: Fix building SDL3 without dialog support

From 1d5d948ccf2b02cad806c56395cdc36c00f24599 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Sun, 8 Dec 2024 15:31:19 +0100
Subject: [PATCH] Fix building SDL3 without dialog support

---
 CMakeLists.txt                                |  2 +-
 include/build_config/SDL_build_config.h.cmake | 11 +++----
 src/dialog/SDL_dialog.c                       | 30 ++++++++++++++++++-
 3 files changed, 36 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d60fca5ef2454..9db20705f4c47 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2872,9 +2872,9 @@ elseif(N3DS)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/file/n3ds/*.c")
 endif()
 
+sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/SDL_dialog.c)
 if (SDL_DIALOG)
   sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/SDL_dialog_utils.c)
-  sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/SDL_dialog.c)
   if(ANDROID)
     sdl_sources(${SDL3_SOURCE_DIR}/src/dialog/android/SDL_androiddialog.c)
     set(HAVE_SDL_DIALOG TRUE)
diff --git a/include/build_config/SDL_build_config.h.cmake b/include/build_config/SDL_build_config.h.cmake
index 2a5bdf1035d74..561836a998c7b 100644
--- a/include/build_config/SDL_build_config.h.cmake
+++ b/include/build_config/SDL_build_config.h.cmake
@@ -257,16 +257,17 @@
 
 /* Allow disabling of major subsystems */
 #cmakedefine SDL_AUDIO_DISABLED @SDL_AUDIO_DISABLED@
+#cmakedefine SDL_VIDEO_DISABLED @SDL_VIDEO_DISABLED@
+#cmakedefine SDL_GPU_DISABLED @SDL_GPU_DISABLED@
+#cmakedefine SDL_RENDER_DISABLED @SDL_RENDER_DISABLED@
+#cmakedefine SDL_CAMERA_DISABLED @SDL_CAMERA_DISABLED@
 #cmakedefine SDL_JOYSTICK_DISABLED @SDL_JOYSTICK_DISABLED@
 #cmakedefine SDL_HAPTIC_DISABLED @SDL_HAPTIC_DISABLED@
 #cmakedefine SDL_HIDAPI_DISABLED @SDL_HIDAPI_DISABLED@
+#cmakedefine SDL_POWER_DISABLED @SDL_POWER_DISABLED@
 #cmakedefine SDL_SENSOR_DISABLED @SDL_SENSOR_DISABLED@
-#cmakedefine SDL_RENDER_DISABLED @SDL_RENDER_DISABLED@
+#cmakedefine SDL_DIALOG_DISABLED @SDL_DIALOG_DISABLED@
 #cmakedefine SDL_THREADS_DISABLED @SDL_THREADS_DISABLED@
-#cmakedefine SDL_VIDEO_DISABLED @SDL_VIDEO_DISABLED@
-#cmakedefine SDL_POWER_DISABLED @SDL_POWER_DISABLED@
-#cmakedefine SDL_CAMERA_DISABLED @SDL_CAMERA_DISABLED@
-#cmakedefine SDL_GPU_DISABLED @SDL_GPU_DISABLED@
 
 /* Enable various audio drivers */
 #cmakedefine SDL_AUDIO_DRIVER_ALSA @SDL_AUDIO_DRIVER_ALSA@
diff --git a/src/dialog/SDL_dialog.c b/src/dialog/SDL_dialog.c
index 938666b210f9c..4831362ba3828 100644
--- a/src/dialog/SDL_dialog.c
+++ b/src/dialog/SDL_dialog.c
@@ -28,7 +28,10 @@ void SDL_ShowFileDialogWithProperties(SDL_FileDialogType type, SDL_DialogFileCal
     if (!callback) {
         return;
     }
-
+#ifdef SDL_DIALOG_DISABLED
+    SDL_SetError("SDL not built with dialog support");
+    callback(userdata, NULL, -1);
+#else
     SDL_DialogFileFilter *filters = SDL_GetPointerProperty(props, SDL_PROP_FILE_DIALOG_FILTERS_POINTER, NULL);
     int nfilters = (int) SDL_GetNumberProperty(props, SDL_PROP_FILE_DIALOG_NFILTERS_NUMBER, -1);
 
@@ -58,10 +61,18 @@ void SDL_ShowFileDialogWithProperties(SDL_FileDialogType type, SDL_DialogFileCal
         callback(userdata, NULL, -1);
         break;
     };
+#endif
 }
 
 void SDL_ShowOpenFileDialog(SDL_DialogFileCallback callback, void *userdata, SDL_Window *window, const SDL_DialogFileFilter *filters, int nfilters, const char *default_location, bool allow_many)
 {
+#ifdef SDL_DIALOG_DISABLED
+    if (!callback) {
+        return;
+    }
+    SDL_SetError("SDL not built with dialog support");
+    callback(userdata, NULL, -1);
+#else
     SDL_PropertiesID props = SDL_CreateProperties();
 
     SDL_SetPointerProperty(props, SDL_PROP_FILE_DIALOG_FILTERS_POINTER, (void *) filters);
@@ -73,10 +84,18 @@ void SDL_ShowOpenFileDialog(SDL_DialogFileCallback callback, void *userdata, SDL
     SDL_ShowFileDialogWithProperties(SDL_FILEDIALOG_OPENFILE, callback, userdata, props);
 
     SDL_DestroyProperties(props);
+#endif
 }
 
 void SDL_ShowSaveFileDialog(SDL_DialogFileCallback callback, void *userdata, SDL_Window *window, const SDL_DialogFileFilter *filters, int nfilters, const char *default_location)
 {
+#ifdef SDL_DIALOG_DISABLED
+    if (!callback) {
+        return;
+    }
+    SDL_SetError("SDL not built with dialog support");
+    callback(userdata, NULL, -1);
+#else
     SDL_PropertiesID props = SDL_CreateProperties();
 
     SDL_SetPointerProperty(props, SDL_PROP_FILE_DIALOG_FILTERS_POINTER, (void *) filters);
@@ -87,10 +106,18 @@ void SDL_ShowSaveFileDialog(SDL_DialogFileCallback callback, void *userdata, SDL
     SDL_ShowFileDialogWithProperties(SDL_FILEDIALOG_SAVEFILE, callback, userdata, props);
 
     SDL_DestroyProperties(props);
+#endif
 }
 
 void SDL_ShowOpenFolderDialog(SDL_DialogFileCallback callback, void *userdata, SDL_Window *window, const char *default_location, bool allow_many)
 {
+#ifdef SDL_DIALOG_DISABLED
+    if (!callback) {
+        return;
+    }
+    SDL_SetError("SDL not built with dialog support");
+    callback(userdata, NULL, -1);
+#else
     SDL_PropertiesID props = SDL_CreateProperties();
 
     SDL_SetPointerProperty(props, SDL_PROP_FILE_DIALOG_WINDOW_POINTER, window);
@@ -100,4 +127,5 @@ void SDL_ShowOpenFolderDialog(SDL_DialogFileCallback callback, void *userdata, S
     SDL_ShowFileDialogWithProperties(SDL_FILEDIALOG_OPENFOLDER, callback, userdata, props);
 
     SDL_DestroyProperties(props);
+#endif
 }