[gnome-games] retro-input-manager: Add 'input-mode' property

[Alexander Mikhaylenko <alexm src gnome org>]

commit 484aa2d2cc3f96b2d619393d6395fbea08d798e5
Author: Yetizone <andreii lisita gmail com>
Date:   Sun Nov 18 18:15:03 2018 +0200

    retro-input-manager: Add 'input-mode' property
    
    Only allow gamepad input in `InputMode.GAMEPAD`, and only keyboard input in `InputMode.KEYBOARD`.

 src/retro/retro-input-manager.vala | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)
---
diff --git a/src/retro/retro-input-manager.vala b/src/retro/retro-input-manager.vala
index c31221cb..5acd1257 100644
--- a/src/retro/retro-input-manager.vala
+++ b/src/retro/retro-input-manager.vala
@@ -5,6 +5,36 @@ private class Games.RetroInputManager : Object {
        private Retro.CoreView view;
        private KeyboardMappingManager keyboard_mapping_manager;
        private Manette.Monitor monitor;
+       private InputMode _input_mode;
+       public InputMode input_mode {
+               get { return _input_mode; }
+               set {
+                       if (value == _input_mode)
+                               return;
+
+                       var core_view_joypad = view.as_controller (Retro.ControllerType.JOYPAD);
+
+                       _input_mode = value;
+                       switch (value) {
+                       case InputMode.GAMEPAD:
+                               core.set_keyboard (null);
+                               core.set_default_controller (Retro.ControllerType.JOYPAD, core_view_joypad);
+
+                               break;
+                       case InputMode.KEYBOARD:
+                               core.set_keyboard (view);
+                               core.set_default_controller (Retro.ControllerType.JOYPAD, null);
+
+                               break;
+                       case InputMode.NONE:
+                               core.set_keyboard (null);
+                               core.set_default_controller (Retro.ControllerType.JOYPAD, null);
+
+                               break;
+                       }
+               }
+       }
+
        // This is used only to compute the port on which a device is connected,
        // which is needed to not store it in closures which would also hold a
        // reference on the current object and create a reference cycle, leading to
@@ -22,8 +52,8 @@ private class Games.RetroInputManager : Object {
                keyboard_mapping_manager = new KeyboardMappingManager ();
                view.set_key_joypad_mapping (keyboard_mapping_manager.mapping);
                keyboard_mapping_manager.changed.connect (on_keyboard_mapping_manager_changed);
-               core.set_keyboard (view);
                view.set_as_default_controller (core);
+               input_mode = InputMode.GAMEPAD;
 
                monitor = new Manette.Monitor ();
                var iterator = monitor.iterate ();