[gnome-games] retro-runner: Load options from file

[Adrien Plazas <aplazas src gnome org>]

commit d291da9aacebe8d246748e0135d1a951d353f7e5
Author: Exalm <exalm7659 gmail com>
Date:   Wed May 2 19:04:50 2018 +0500

    retro-runner: Load options from file
    
    Use RetroOptions to parse an option file located in OPTIONS_DIR.
    
    Since some libretro options have to be applied at the start, it does
    not apply options directly after boot() call, but instead connect to
    a signal that would be emitted directly after the core registers the
    options.

 src/retro/retro-runner.vala | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
---
diff --git a/src/retro/retro-runner.vala b/src/retro/retro-runner.vala
index cbdca3b..14ab325 100644
--- a/src/retro/retro-runner.vala
+++ b/src/retro/retro-runner.vala
@@ -244,6 +244,16 @@ public class Games.RetroRunner : Object, Runner {
                        module_path = core_source.get_module_path ();
                core = new Retro.Core (module_path);
 
+               var options_path = get_options_path ();
+               core.options_set.connect (() => {
+                       try {
+                               var options = new RetroOptions (options_path);
+                               options.apply (core);
+                       } catch (Error e) {
+                               critical (e.message);
+                       }
+               });
+
                if (core_source != null) {
                        var platforms_dir = Application.get_platforms_dir ();
                        var platform = core_source.get_platform ();
@@ -358,6 +368,18 @@ public class Games.RetroRunner : Object, Runner {
                should_save = false;
        }
 
+       private string get_options_path () throws Error {
+               assert (core != null);
+
+               var core_filename = core.get_filename ();
+               var file = File.new_for_path (core_filename);
+               var basename = file.get_basename ();
+               var options_name = basename.split (".")[0];
+               options_name = options_name.replace ("_libretro", "");
+
+               return @"$OPTIONS_DIR/$options_name.options";
+       }
+
        private string get_save_directory_path () throws Error {
                if (save_directory_path != null)
                        return save_directory_path;