Fix, OptionsCreator: export options on Linux (#5774)

* Core/Utils: Use correct env for save_filename from AppImage

* OptionsCreator: run export on a separate thread

Running a blocking call from kivy misbehaves on Linux.
This also changes '*.yaml' to '.yaml' for Utils.save_filename,
which is the correct way to call it.

* Core/Utils: destroy Tk root after save/open_filename

This allows using those functions from multiple threads.
Note that pure Tk apps should not use those functions from Utils.

* OptionsCreator: show snack when save_filename fails

* OptionsCreator: disable window while exporting

* OptionsCreator: fixing typing of added stuff

OptionsCreator.py

@@ -6,6 +6,7 @@ if __name__ == "__main__":
 
 from kvui import (ThemedApp, ScrollBox, MainLayout, ContainerLayout, dp, Widget, MDBoxLayout, TooltipLabel, MDLabel,
                   ToggleButton, MarkupDropdown, ResizableTextField)
+from kivy.clock import Clock
 from kivy.uix.behaviors.button import ButtonBehavior
 from kivymd.uix.behaviors import RotateBehavior
 from kivymd.uix.anchorlayout import MDAnchorLayout
@@ -269,34 +270,53 @@ class OptionsCreator(ThemedApp):
         self.options = {}
         super().__init__()
 
-    def export_options(self, button: Widget):
-        if 0 < len(self.name_input.text) < 17 and self.current_game:
-            file_name = Utils.save_filename("Export Options File As...", [("YAML", ["*.yaml"])],
+    @staticmethod
+    def show_result_snack(text: str) -> None:
+        MDSnackbar(MDSnackbarText(text=text), y=dp(24), pos_hint={"center_x": 0.5}, size_hint_x=0.5).open()
+
+    def on_export_result(self, text: str | None) -> None:
+        self.container.disabled = False
+        if text is not None:
+            Clock.schedule_once(lambda _: self.show_result_snack(text), 0)
+
+    def export_options_background(self, options: dict[str, typing.Any]) -> None:
+        try:
+            file_name = Utils.save_filename("Export Options File As...", [("YAML", [".yaml"])],
                                             Utils.get_file_safe_name(f"{self.name_input.text}.yaml"))
+        except Exception:
+            self.on_export_result("Could not open dialog. Already open?")
+            raise
+
+        if not file_name:
+            self.on_export_result(None)  # No file selected. No need to show a message for this.
+            return
+
+        try:
+            with open(file_name, 'w') as f:
+                f.write(Utils.dump(options, sort_keys=False))
+                f.close()
+                self.on_export_result("File saved successfully.")
+        except Exception:
+            self.on_export_result("Could not save file.")
+            raise
+
+    def export_options(self, button: Widget) -> None:
+        if 0 < len(self.name_input.text) < 17 and self.current_game:
+            import threading
             options = {
                 "name": self.name_input.text,
                 "description": f"YAML generated by Archipelago {Utils.__version__}.",
                 "game": self.current_game,
                 self.current_game: {k: check_random(v) for k, v in self.options.items()}
             }
-            try:
-                with open(file_name, 'w') as f:
-                    f.write(Utils.dump(options, sort_keys=False))
-                    f.close()
-                    MDSnackbar(MDSnackbarText(text="File saved successfully."), y=dp(24), pos_hint={"center_x": 0.5},
-                               size_hint_x=0.5).open()
-            except FileNotFoundError:
-                MDSnackbar(MDSnackbarText(text="Saving cancelled."), y=dp(24), pos_hint={"center_x": 0.5},
-                           size_hint_x=0.5).open()
+            threading.Thread(target=self.export_options_background, args=(options,), daemon=True).start()
+            self.container.disabled = True
         elif not self.name_input.text:
-            MDSnackbar(MDSnackbarText(text="Name must not be empty."), y=dp(24), pos_hint={"center_x": 0.5},
-                       size_hint_x=0.5).open()
+            self.show_result_snack("Name must not be empty.")
         elif not self.current_game:
-            MDSnackbar(MDSnackbarText(text="You must select a game to play."), y=dp(24), pos_hint={"center_x": 0.5},
-                       size_hint_x=0.5).open()
+            self.show_result_snack("You must select a game to play.")
         else:
-            MDSnackbar(MDSnackbarText(text="Name cannot be longer than 16 characters."), y=dp(24),
-                       pos_hint={"center_x": 0.5}, size_hint_x=0.5).open()
+            self.show_result_snack("Name cannot be longer than 16 characters.")
 
     def create_range(self, option: typing.Type[Range], name: str):
         def update_text(range_box: VisualRange):