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Add an input device function to convert keycodes to evdev codes

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This adds a virtual function to ClutterInputDevice to translate a
keycode from the hardware_keycode member of ClutterKeyEvent to an
evdev keycode. The function can fail so that input backends that don't
have a sensible way to translate to evdev keycodes can return FALSE.
There are implementations for evdev, wayland and X. The X
implementation assumes that the X server is using an evdev driver in
which case the hardware keycodes are the evdev codes plus 8.

Reviewed-by: Emmanuele Bassi <ebassi@linux.intel.com>
This commit is contained in:
Neil Roberts 2012-01-17 15:40:08 +00:00
parent a3bbcff946
commit 13e3f9e5f1
8 changed files with 93 additions and 0 deletions
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3
clutter/clutter-device-manager-private.h
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@ -113,6 +113,9 @@ struct _ClutterInputDeviceClass
void (* select_stage_events) (ClutterInputDevice *device,
ClutterStage *stage,
gint event_mask);
gboolean (* keycode_to_evdev) (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode);
};
/* device manager */

31
clutter/clutter-input-device.c
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@ -1410,3 +1410,34 @@ _clutter_input_device_select_stage_events (ClutterInputDevice *device,
if (device_class->select_stage_events != NULL)
device_class->select_stage_events (device, stage, event_mask);
}
/**
* clutter_input_device_keycode_to_evdev:
* @device: A #ClutterInputDevice
* @hardware_keycode: The hardware keycode from a #ClutterKeyEvent
* @evdev_keycode: The return location for the evdev keycode
*
* Translates a hardware keycode from a #ClutterKeyEvent to the
* equivalent evdev keycode. Note that depending on the input backend
* used by Clutter this function can fail if there is no obvious
* mapping between the key codes. The hardware keycode can be taken
* from the hardware_keycode member of #ClutterKeyEvent.
*
* Return value: %TRUE if the conversion succeeded, %FALSE otherwise.
* Since: 1.10
*/
gboolean
clutter_input_device_keycode_to_evdev (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode)
{
ClutterInputDeviceClass *device_class;
device_class = CLUTTER_INPUT_DEVICE_GET_CLASS (device);
if (device_class->keycode_to_evdev == NULL)
return FALSE;
else
return device_class->keycode_to_evdev (device,
hardware_keycode,
evdev_keycode);
}

4
clutter/clutter-input-device.h
View File

@ -97,6 +97,10 @@ void clutter_input_device_ungrab (ClutterInputDev
CLUTTER_AVAILABLE_IN_1_10
ClutterActor * clutter_input_device_get_grabbed_actor (ClutterInputDevice *device);
gboolean clutter_input_device_keycode_to_evdev (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode);
G_END_DECLS
#endif /* __CLUTTER_INPUT_DEVICE_H__ */

12
clutter/evdev/clutter-input-device-evdev.c
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@ -123,6 +123,17 @@ clutter_input_device_evdev_finalize (GObject *object)
G_OBJECT_CLASS (clutter_input_device_evdev_parent_class)->finalize (object);
}
static gboolean
clutter_input_device_evdev_keycode_to_evdev (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode)
{
/* The hardware keycodes from the evdev backend are already evdev
keycodes */
*evdev_keycode = hardware_keycode;
return TRUE;
}
static void
clutter_input_device_evdev_class_init (ClutterInputDeviceEvdevClass *klass)
{
@ -134,6 +145,7 @@ clutter_input_device_evdev_class_init (ClutterInputDeviceEvdevClass *klass)
object_class->get_property = clutter_input_device_evdev_get_property;
object_class->set_property = clutter_input_device_evdev_set_property;
object_class->finalize = clutter_input_device_evdev_finalize;
klass->keycode_to_evdev = clutter_input_device_evdev_keycode_to_evdev;
/*
* ClutterInputDeviceEvdev:udev-device:

12
clutter/wayland/clutter-input-device-wayland.c
View File

@ -247,9 +247,21 @@ const struct wl_input_device_listener _clutter_input_device_wayland_listener = {
clutter_wayland_handle_keyboard_focus,
};
static gboolean
clutter_input_device_wayland_keycode_to_evdev (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode)
{
/* The hardware keycodes from the wayland backend are already evdev
keycodes */
*evdev_keycode = hardware_keycode;
return TRUE;
}
static void
clutter_input_device_wayland_class_init (ClutterInputDeviceWaylandClass *klass)
{
klass->keycode_to_evdev = clutter_input_device_wayland_keycode_to_evdev;
}
static void

15
clutter/x11/clutter-input-device-core-x11.c
View File

@ -200,6 +200,20 @@ clutter_input_device_x11_constructed (GObject *gobject)
G_OBJECT_CLASS (clutter_input_device_x11_parent_class)->constructed (gobject);
}
static gboolean
clutter_input_device_x11_keycode_to_evdev (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode)
{
/* When using evdev under X11 the hardware keycodes are the evdev
keycodes plus 8. I haven't been able to find any documentation to
know what the +8 is for. FIXME: This should probably verify that
X server is using evdev. */
*evdev_keycode = hardware_keycode - 8;
return TRUE;
}
static void
clutter_input_device_x11_class_init (ClutterInputDeviceX11Class *klass)
{
@ -210,6 +224,7 @@ clutter_input_device_x11_class_init (ClutterInputDeviceX11Class *klass)
gobject_class->dispose = clutter_input_device_x11_dispose;
device_class->select_stage_events = clutter_input_device_x11_select_stage_events;
device_class->keycode_to_evdev = clutter_input_device_x11_keycode_to_evdev;
}
static void

15
clutter/x11/clutter-input-device-xi2.c
View File

@ -115,6 +115,20 @@ clutter_input_device_xi2_constructed (GObject *gobject)
G_OBJECT_CLASS (clutter_input_device_xi2_parent_class)->constructed (gobject);
}
static gboolean
clutter_input_device_xi2_keycode_to_evdev (ClutterInputDevice *device,
guint hardware_keycode,
guint *evdev_keycode)
{
/* When using evdev under X11 the hardware keycodes are the evdev
keycodes plus 8. I haven't been able to find any documentation to
know what the +8 is for. FIXME: This should probably verify that
X server is using evdev. */
*evdev_keycode = hardware_keycode - 8;
return TRUE;
}
static void
clutter_input_device_xi2_class_init (ClutterInputDeviceXI2Class *klass)
{
@ -124,6 +138,7 @@ clutter_input_device_xi2_class_init (ClutterInputDeviceXI2Class *klass)
gobject_class->constructed = clutter_input_device_xi2_constructed;
device_class->select_stage_events = clutter_input_device_xi2_select_stage_events;
device_class->keycode_to_evdev = clutter_input_device_xi2_keycode_to_evdev;
}
static void

1
doc/reference/clutter/clutter-sections.txt
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@ -1184,6 +1184,7 @@ clutter_input_device_set_enabled
clutter_input_device_get_enabled
clutter_input_device_get_associated_device
clutter_input_device_get_slave_devices
clutter_input_device_keycode_to_evdev
<SUBSECTION>
clutter_input_device_get_n_keys