Check if platform has a file picker

src/openrct2-ui/UiContext.Android.cpp

@@ -70,6 +70,11 @@ namespace OpenRCT2::Ui
         {
             STUB();
         }
+
+        bool HasFilePicker() const override
+        {
+            return false;
+        }
     };
 
     IPlatformUiContext* CreatePlatformUiContext()

src/openrct2-ui/UiContext.Linux.cpp

@@ -250,6 +250,12 @@ namespace OpenRCT2::Ui
             return result;
         }
 
+        bool HasFilePicker() const override
+        {
+            std::string dummy;
+            return GetDialogApp(&dummy) != DIALOG_TYPE::NONE;
+        }
+
     private:
         static DIALOG_TYPE GetDialogApp(std::string* executablePath)
         {

src/openrct2-ui/UiContext.Win32.cpp

@@ -197,6 +197,11 @@ namespace OpenRCT2::Ui
             return result;
         }
 
+        bool HasFilePicker() const override
+        {
+            return true;
+        }
+
     private:
         HWND GetHWND(SDL_Window* window)
         {

src/openrct2-ui/UiContext.cpp

@@ -624,6 +624,11 @@ public:
         return _platformUiContext->ShowDirectoryDialog(_window, title);
     }
 
+    bool HasFilePicker() const override
+    {
+        return _platformUiContext->HasFilePicker();
+    }
+
     IWindowManager* GetWindowManager() override
     {
         return _windowManager;

src/openrct2-ui/UiContext.h

@@ -38,6 +38,8 @@ namespace OpenRCT2
             virtual void OpenURL(const std::string& url) abstract;
             virtual std::string ShowFileDialog(SDL_Window* window, const FileDialogDesc& desc) abstract;
             virtual std::string ShowDirectoryDialog(SDL_Window* window, const std::string& title) abstract;
+
+            virtual bool HasFilePicker() const abstract;
         };
 
         std::unique_ptr<IUiContext> CreateUiContext(const std::shared_ptr<IPlatformEnvironment>& env);

src/openrct2-ui/UiContext.macOS.mm

@@ -156,6 +156,11 @@ namespace OpenRCT2::Ui
             }
         }
 
+        bool HasFilePicker() const override
+        {
+            return true;
+        }
+
     private:
         static int32_t Execute(const std::string& command, std::string* output = nullptr)
         {

src/openrct2-ui/windows/LoadSave.cpp

@@ -30,6 +30,7 @@
 #include <openrct2/ride/TrackDesign.h>
 #include <openrct2/scenario/Scenario.h>
 #include <openrct2/title/TitleScreen.h>
+#include <openrct2/ui/UiContext.h>
 #include <openrct2/util/Util.h>
 #include <openrct2/windows/Intent.h>
 #include <openrct2/world/Park.h>
@@ -252,7 +253,8 @@ rct_window* window_loadsave_open(int32_t type, const char* defaultName, loadsave
         return nullptr;
 
     // Bypass the lot?
-    if (gConfigGeneral.use_native_browse_dialog)
+    auto hasFilePicker = OpenRCT2::GetContext()->GetUiContext()->HasFilePicker();
+    if (gConfigGeneral.use_native_browse_dialog && hasFilePicker)
     {
         if (browse(isSave, path, sizeof(path)))
         {
@@ -273,6 +275,13 @@ rct_window* window_loadsave_open(int32_t type, const char* defaultName, loadsave
         w->min_height = WH / 2;
         w->max_width = WW * 2;
         w->max_height = WH * 2;
+
+        if (!hasFilePicker)
+        {
+            w->enabled_widgets &= ~(1 << WIDX_BROWSE);
+            w->disabled_widgets |= (1 << WIDX_BROWSE);
+            window_loadsave_widgets[WIDX_BROWSE].type = WWT_EMPTY;
+        }
     }
 
     const char* pattern = getFilterPatternByType(type, isSave);

src/openrct2-ui/windows/Options.cpp

@@ -575,6 +575,13 @@ static void window_options_common_invalidate_before(rct_window* w)
     window_options_set_pressed_tab(w);
 
     w->disabled_widgets = 0;
+    auto hasFilePicker = OpenRCT2::GetContext()->GetUiContext()->HasFilePicker();
+    if (!hasFilePicker)
+    {
+        w->enabled_widgets &= ~WIDX_ALWAYS_NATIVE_LOADSAVE;
+        w->disabled_widgets |= WIDX_ALWAYS_NATIVE_LOADSAVE;
+        w->widgets[WIDX_ALWAYS_NATIVE_LOADSAVE].type = WWT_EMPTY;
+    }
 }
 
 static void window_options_common_invalidate_after(rct_window* w)

src/openrct2/ui/DummyUiContext.cpp

@@ -198,6 +198,11 @@ namespace OpenRCT2::Ui
         {
             delete _windowManager;
         }
+
+        bool HasFilePicker() const override
+        {
+            return false;
+        }
     };
 
     std::shared_ptr<IUiContext> CreateDummyUiContext()

src/openrct2/ui/UiContext.h

@@ -117,6 +117,7 @@ namespace OpenRCT2
             virtual void OpenURL(const std::string& url) abstract;
             virtual std::string ShowFileDialog(const FileDialogDesc& desc) abstract;
             virtual std::string ShowDirectoryDialog(const std::string& title) abstract;
+            virtual bool HasFilePicker() const abstract;
 
             // Input
             virtual const CursorState* GetCursorState() abstract;