Native file chooser, untested

desktop/src/mindustry/desktop/DesktopLauncher.java

@@ -6,6 +6,7 @@ import arc.backend.sdl.*;
 import arc.backend.sdl.jni.*;
 import arc.discord.*;
 import arc.discord.DiscordRPC.*;
+import arc.filedialogs.*;
 import arc.files.*;
 import arc.func.*;
 import arc.math.*;
@@ -23,6 +24,7 @@ import mindustry.net.*;
 import mindustry.net.Net.*;
 import mindustry.service.*;
 import mindustry.type.*;
+import mindustry.ui.dialogs.*;
 
 import java.io.*;
 
@@ -36,6 +38,55 @@ public class DesktopLauncher extends ClientLauncher{
     public static void main(String[] arg){
         try{
             Vars.loadLogger();
+            Vars.platform = new Platform(){
+                @Override
+                public void showFileChooser(boolean open, String title, String extension, Cons<Fi> cons){
+                    if(OS.isWindows || OS.isMac){
+                        Threads.daemon(() -> {
+                            try{
+                                FileDialogs.loadNatives();
+
+                                String result;
+
+                                if(open){
+                                    result = FileDialogs.openFileDialog(title, FileChooser.getLastDirectory().absolutePath(), new String[]{"*." + extension}, "." + extension + " files", false);
+                                }else{
+                                    result = FileDialogs.saveFileDialog(title, FileChooser.getLastDirectory().absolutePath(), new String[]{"*." + extension}, "." + extension + " files");
+                                }
+
+                                if(result == null) return;
+
+                                if(result.length() > 1 && result.contains("\n")){
+                                    result = result.split("\n")[0];
+                                }
+
+                                //cancelled selection, ignore result
+                                if(result.isEmpty() || result.equals("\n")) return;
+                                if(result.endsWith("\n")) result = result.substring(0, result.length() - 1);
+                                if(result.contains("\n")) throw new IOException("invalid input: \"" + result + "\"");
+
+                                Fi file = Core.files.absolute(result);
+                                Core.app.post(() -> {
+                                    FileChooser.setLastDirectory(file.isDirectory() ? file : file.parent());
+
+                                    if(!open){
+                                        cons.get(file.parent().child(file.nameWithoutExtension() + "." + extension));
+                                    }else{
+                                        cons.get(file);
+                                    }
+                                });
+                            }catch(Throwable error){
+                                Log.err("Failure to execute native file chooser", error);
+                                Core.app.post(() -> {
+                                    Platform.super.showFileChooser(open, title, extension, cons);
+                                });
+                            }
+                        });
+                    }else{
+                        Platform.super.showFileChooser(open, title, extension, cons);
+                    }
+                }
+            };
             new SdlApplication(new DesktopLauncher(arg), new SdlConfig(){{
                 title = "Mindustry";
                 maximized = true;