[retro-gtk] controller-codes: Implement mouse buttons 4 and 5

[Adrien Plazas <aplazas src gnome org>]

commit e2866c71648e124ebfd3bf425d89ef245f697e9e
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Dec 20 19:05:18 2020 +0100

    controller-codes: Implement mouse buttons 4 and 5

 UNIMPLEMENTED.md                        | 9 ---------
 shared/retro-controller-codes-private.h | 2 +-
 shared/retro-controller-codes.h         | 4 ++++
 3 files changed, 5 insertions(+), 10 deletions(-)
---
diff --git a/UNIMPLEMENTED.md b/UNIMPLEMENTED.md
index cf8e55e..66fb967 100644
--- a/UNIMPLEMENTED.md
+++ b/UNIMPLEMENTED.md
@@ -835,15 +835,6 @@ struct retro_memory_map
 };
 ```
 
-## Mouse
-
-The following mouse buttons are unimplemented:
-
-```
-#define RETRO_DEVICE_ID_MOUSE_BUTTON_4         9
-#define RETRO_DEVICE_ID_MOUSE_BUTTON_5         10
-```
-
 ## Overscan
 
 Overscan is implemented by `RetroCore.overscan` but is never set and can't be
diff --git a/shared/retro-controller-codes-private.h b/shared/retro-controller-codes-private.h
index c83cd7b..4445377 100644
--- a/shared/retro-controller-codes-private.h
+++ b/shared/retro-controller-codes-private.h
@@ -14,7 +14,7 @@ G_BEGIN_DECLS
 #define RETRO_ANALOG_INDEX_COUNT (RETRO_ANALOG_INDEX_RIGHT + 1)
 #define RETRO_JOYPAD_ID_COUNT (RETRO_JOYPAD_ID_R3 + 1)
 #define RETRO_LIGHTGUN_ID_COUNT (RETRO_LIGHTGUN_ID_START + 1)
-#define RETRO_MOUSE_ID_COUNT (RETRO_MOUSE_ID_HORIZ_WHEELDOWN + 1)
+#define RETRO_MOUSE_ID_COUNT (RETRO_MOUSE_ID_BUTTON_5 + 1)
 #define RETRO_POINTER_ID_COUNT (RETRO_POINTER_ID_PRESSED + 1)
 
 G_END_DECLS
diff --git a/shared/retro-controller-codes.h b/shared/retro-controller-codes.h
index f6f6324..9c4d9fd 100644
--- a/shared/retro-controller-codes.h
+++ b/shared/retro-controller-codes.h
@@ -78,6 +78,8 @@ GType retro_mouse_id_get_type (void) G_GNUC_CONST;
  * @RETRO_MOUSE_ID_MIDDLE: the middle button of a mouse
  * @RETRO_MOUSE_ID_HORIZ_WHEELUP: the horizontal up direction of a mouse wheel
  * @RETRO_MOUSE_ID_HORIZ_WHEELDOWN: the horizontal down direction of a mouse wheel
+ * @RETRO_MOUSE_ID_BUTTON_4: the fourth button of a mouse
+ * @RETRO_MOUSE_ID_BUTTON_5: the fifth button of a mouse
  *
  * Represents the inputs for the Libretro mouse.
  */
@@ -92,6 +94,8 @@ typedef enum
   RETRO_MOUSE_ID_MIDDLE,
   RETRO_MOUSE_ID_HORIZ_WHEELUP,
   RETRO_MOUSE_ID_HORIZ_WHEELDOWN,
+  RETRO_MOUSE_ID_BUTTON_4,
+  RETRO_MOUSE_ID_BUTTON_5,
 } RetroMouseId;
 
 #define RETRO_TYPE_LIGHTGUN_ID (retro_lightgun_id_get_type ())