[retro-gtk] retro-core: Add set_default_controller()

[Adrien Plazas <aplazas src gnome org>]

commit c551864d248b818c167cf284288a94bf76c47608
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Oct 29 14:42:25 2017 +0100

    retro-core: Add set_default_controller()

 retro-gtk/retro-core-private.h |    1 +
 retro-gtk/retro-core.c         |   54 +++++++++++++++++++++++++++++++++------
 retro-gtk/retro-core.h         |    2 +
 3 files changed, 48 insertions(+), 9 deletions(-)
---
diff --git a/retro-gtk/retro-core-private.h b/retro-gtk/retro-core-private.h
index 21c71ac..5a1a73b 100644
--- a/retro-gtk/retro-core-private.h
+++ b/retro-gtk/retro-core-private.h
@@ -46,6 +46,7 @@ struct _RetroCore
   gdouble sample_rate;
 
   RetroKeyboardCallback keyboard_callback;
+  RetroController *default_controllers[RETRO_CONTROLLER_TYPE_COUNT];
   GHashTable *controllers;
   GtkWidget *keyboard_widget;
   gulong key_press_event_id;
diff --git a/retro-gtk/retro-core.c b/retro-gtk/retro-core.c
index 28f5600..b9fdfc5 100644
--- a/retro-gtk/retro-core.c
+++ b/retro-gtk/retro-core.c
@@ -130,6 +130,7 @@ retro_core_finalize (GObject *object)
   RetroCore *self = RETRO_CORE (object);
   RetroUnloadGame unload_game;
   RetroDeinit deinit;
+  gsize i;
 
   g_return_if_fail (RETRO_IS_CORE (self));
 
@@ -146,6 +147,9 @@ retro_core_finalize (GObject *object)
     g_strfreev (self->media_uris);
 
   g_object_unref (self->module);
+  for (i = 0; i < RETRO_CONTROLLER_TYPE_COUNT; i++)
+    if (self->default_controllers[i] != NULL)
+      g_object_unref (self->default_controllers[i]);
   g_hash_table_unref (self->controllers);
   g_object_unref (self->options);
 
@@ -1747,22 +1751,24 @@ retro_core_get_controller_input_state (RetroCore  *self,
                                        RetroInput *input)
 {
   RetroController *controller;
+  RetroControllerType controller_type;
 
   g_return_val_if_fail (RETRO_IS_CORE (self), 0);
 
-  if (!g_hash_table_contains (self->controllers, &port))
-    return 0;
+  controller_type = retro_input_get_controller_type (input) &
+                    RETRO_CONTROLLER_TYPE_TYPE_MASK;
 
   controller = g_hash_table_lookup (self->controllers, &port);
+  if (controller != NULL &&
+      retro_controller_has_capability (controller, controller_type))
+    return retro_controller_get_input_state (controller, input);
 
-  if (controller == NULL)
-    return 0;
-
-  if ((retro_controller_get_capabilities (controller) &
-      (1 << retro_input_get_controller_type (input))) == 0)
-    return 0;
+  controller = self->default_controllers[controller_type];
+  if (controller != NULL &&
+      retro_controller_has_capability (controller, controller_type))
+    return retro_controller_get_input_state (controller, input);
 
-  return retro_controller_get_input_state (controller, input);
+  return 0;
 }
 
 // FIXME documentation
@@ -1788,6 +1794,36 @@ retro_core_get_controller_capabilities (RetroCore *self)
 }
 
 /**
+ * retro_core_set_default_controller:
+ * @self: a #RetroCore
+ * @controller: (nullable): a #RetroController
+ *
+ * Uses @controller as the default controller for its type. When a port has no
+ * controller plugged plugged into it, the core will use the default controllers
+ * instead.
+ */
+void
+retro_core_set_default_controller (RetroCore       *self,
+                                   RetroController *controller)
+{
+  RetroControllerType controller_type;
+  RetroControllerType masked_controller_type;
+
+  g_return_if_fail (RETRO_IS_CORE (self));
+
+  controller_type = retro_controller_get_controller_type (controller);
+  masked_controller_type = controller_type & RETRO_CONTROLLER_TYPE_TYPE_MASK;
+
+  if (masked_controller_type >= RETRO_CONTROLLER_TYPE_COUNT) {
+    g_critical ("Unexpected controller type: %d.", controller_type);
+
+    return;
+  }
+
+  g_set_object (&self->default_controllers[masked_controller_type], controller);
+}
+
+/**
  * retro_core_set_controller:
  * @self: a #RetroCore
  * @port: the port number
diff --git a/retro-gtk/retro-core.h b/retro-gtk/retro-core.h
index 03f069e..215ac09 100644
--- a/retro-gtk/retro-core.h
+++ b/retro-gtk/retro-core.h
@@ -55,6 +55,8 @@ GBytes *retro_core_get_memory (RetroCore       *self,
 void retro_core_set_memory (RetroCore       *self,
                             RetroMemoryType  memory_type,
                             GBytes          *bytes);
+void retro_core_set_default_controller (RetroCore       *self,
+                                        RetroController *controller);
 void retro_core_set_controller (RetroCore       *self,
                                 guint            port,
                                 RetroController *controller);