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gimp/modules/controller_linux_input.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* controller_linux_input.c
* Copyright (C) 2004 Sven Neumann <sven@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/input.h>
#include <gtk/gtk.h>
#include "libgimpmodule/gimpmodule.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "libgimpwidgets/gimpcontroller.h"
#include "libgimp/libgimp-intl.h"
typedef struct
{
guint16 code;
const gchar *name;
const gchar *blurb;
} LinuxInputEvent;
static const LinuxInputEvent key_events[] =
{
{ BTN_0, "button-0", N_("Button 0") },
{ BTN_1, "button-1", N_("Button 1") },
{ BTN_2, "button-2", N_("Button 2") },
{ BTN_3, "button-3", N_("Button 3") },
{ BTN_4, "button-4", N_("Button 4") },
{ BTN_5, "button-5", N_("Button 5") },
{ BTN_6, "button-6", N_("Button 6") },
{ BTN_7, "button-7", N_("Button 7") },
{ BTN_8, "button-8", N_("Button 8") },
{ BTN_9, "button-9", N_("Button 9") },
{ BTN_MOUSE, "button-mouse", N_("Button Mouse") },
{ BTN_LEFT, "button-left", N_("Button Left") },
{ BTN_RIGHT, "button-right", N_("Button Right") },
{ BTN_MIDDLE, "button-middle", N_("Button Middle") },
{ BTN_SIDE, "button-side", N_("Button Side") },
{ BTN_EXTRA, "button-extra", N_("Button Extra") },
{ BTN_FORWARD, "button-forward", N_("Button Forward") },
{ BTN_BACK, "button-back", N_("Button Forward") },
#ifdef BTN_WHEEL
{ BTN_WHEEL, "button-wheel", N_("Button Wheel") },
#endif
#ifdef BTN_GEAR_DOWN
{ BTN_GEAR_DOWN, "button-gear-down", N_("Button Gear Down") },
#endif
#ifdef BTN_GEAR_UP
{ BTN_GEAR_UP, "button-gear-up", N_("Button Gear Up") }
#endif
};
static const LinuxInputEvent rel_events[] =
{
{ REL_WHEEL, "wheel-turn-left", N_("Wheel Turn Left") },
{ REL_WHEEL, "wheel-turn-right", N_("Wheel Turn Right") },
{ REL_DIAL, "dial-turn-left", N_("Dial Turn Left") },
{ REL_DIAL, "dial-turn-right", N_("Dial Turn Right") },
};
enum
{
PROP_0,
PROP_DEVICE
};
#define CONTROLLER_TYPE_LINUX_INPUT (controller_type)
#define CONTROLLER_LINUX_INPUT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CONTROLLER_TYPE_LINUX_INPUT, ControllerLinuxInput))
#define CONTROLLER_LINUX_INPUT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CONTROLLER_TYPE_LINUX_INPUT, ControllerLinuxInputClass))
#define CONTROLLER_IS_LINUX_INPUT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CONTROLLER_TYPE_LINUX_INPUT))
#define CONTROLLER_IS_LINUX_INPUT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CONTROLLER_TYPE_LINUX_INPUT))
typedef struct _ControllerLinuxInput ControllerLinuxInput;
typedef struct _ControllerLinuxInputClass ControllerLinuxInputClass;
struct _ControllerLinuxInput
{
GimpController parent_instance;
gchar *device;
GIOChannel *io;
guint io_id;
};
struct _ControllerLinuxInputClass
{
GimpControllerClass parent_class;
};
GType linux_input_get_type (GTypeModule *module);
static void linux_input_class_init (ControllerLinuxInputClass *klass);
static void linux_input_dispose (GObject *object);
static void linux_input_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void linux_input_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint linux_input_get_n_events (GimpController *controller);
static const gchar * linux_input_get_event_name (GimpController *controller,
gint event_id);
static const gchar * linux_input_get_event_blurb (GimpController *controller,
gint event_id);
static gboolean linux_input_set_device (ControllerLinuxInput *controller,
const gchar *device);
static gboolean linux_input_read_event (GIOChannel *io,
GIOCondition cond,
gpointer data);
static const GimpModuleInfo linux_input_info =
{
GIMP_MODULE_ABI_VERSION,
N_("Linux input event controller"),
"Sven Neumann <sven@gimp.org>",
"v0.1",
"(c) 2004, released under the GPL",
"June 2004"
};
static GType controller_type = 0;
static GimpControllerClass *parent_class = NULL;
G_MODULE_EXPORT const GimpModuleInfo *
gimp_module_query (GTypeModule *module)
{
return &linux_input_info;
}
G_MODULE_EXPORT gboolean
gimp_module_register (GTypeModule *module)
{
linux_input_get_type (module);
return TRUE;
}
GType
linux_input_get_type (GTypeModule *module)
{
if (! controller_type)
{
static const GTypeInfo controller_info =
{
sizeof (ControllerLinuxInputClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) linux_input_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (ControllerLinuxInput),
0, /* n_preallocs */
NULL /* instance_init */
};
controller_type = g_type_module_register_type (module,
GIMP_TYPE_CONTROLLER,
"ControllerLinuxInput",
&controller_info, 0);
}
return controller_type;
}
static void
linux_input_class_init (ControllerLinuxInputClass *klass)
{
GimpControllerClass *controller_class = GIMP_CONTROLLER_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->dispose = linux_input_dispose;
object_class->get_property = linux_input_get_property;
object_class->set_property = linux_input_set_property;
g_object_class_install_property (object_class, PROP_DEVICE,
g_param_spec_string ("device",
_("Device:"), NULL,
NULL,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
GIMP_MODULE_PARAM_SERIALIZE));
controller_class->name = _("Linux Input Events");
controller_class->get_n_events = linux_input_get_n_events;
controller_class->get_event_name = linux_input_get_event_name;
controller_class->get_event_blurb = linux_input_get_event_blurb;
}
static void
linux_input_dispose (GObject *object)
{
ControllerLinuxInput *controller = CONTROLLER_LINUX_INPUT (object);
linux_input_set_device (controller, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
linux_input_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
ControllerLinuxInput *controller = CONTROLLER_LINUX_INPUT (object);
switch (property_id)
{
case PROP_DEVICE:
linux_input_set_device (controller, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
linux_input_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
ControllerLinuxInput *controller = CONTROLLER_LINUX_INPUT (object);
switch (property_id)
{
case PROP_DEVICE:
g_value_set_string (value, controller->device);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint
linux_input_get_n_events (GimpController *controller)
{
return G_N_ELEMENTS (key_events) + G_N_ELEMENTS (rel_events);
}
static const gchar *
linux_input_get_event_name (GimpController *controller,
gint event_id)
{
if (event_id < 0)
{
return NULL;
}
else if (event_id < G_N_ELEMENTS (key_events))
{
return key_events[event_id].name;
}
else if (event_id < linux_input_get_n_events (controller))
{
return rel_events[event_id - G_N_ELEMENTS (key_events)].name;
}
else
{
return NULL;
}
}
static const gchar *
linux_input_get_event_blurb (GimpController *controller,
gint event_id)
{
if (event_id < 0)
{
return NULL;
}
else if (event_id < G_N_ELEMENTS (key_events))
{
return gettext (key_events[event_id].blurb);
}
else if (event_id < linux_input_get_n_events (controller))
{
return gettext (rel_events[event_id - G_N_ELEMENTS (key_events)].blurb);
}
else
{
return NULL;
}
}
static gboolean
linux_input_set_device (ControllerLinuxInput *controller,
const gchar *device)
{
if (controller->io)
{
g_source_remove (controller->io_id);
controller->io_id = 0;
g_io_channel_unref (controller->io);
controller->io = NULL;
}
if (controller->device)
g_free (controller->device);
controller->device = g_strdup (device);
if (controller->device && strlen (controller->device))
{
gint fd;
fd = open (controller->device, O_RDONLY);
if (fd >= 0)
{
gchar name[256];
name[0] = '\0';
if (ioctl (fd, EVIOCGNAME (sizeof (name)), name) == 0 &&
strlen (name) > 0 &&
g_utf8_validate (name, -1, NULL))
{
g_object_set (controller, "name", name, NULL);
}
else
{
gchar *name = g_strdup_printf (_("Reading from %s"),
controller->device);
g_object_set (controller, "name", name, NULL);
g_free (name);
}
controller->io = g_io_channel_unix_new (fd);
g_io_channel_set_close_on_unref (controller->io, TRUE);
g_io_channel_set_encoding (controller->io, NULL, NULL);
controller->io_id = g_io_add_watch (controller->io,
G_IO_IN,
linux_input_read_event,
controller);
return TRUE;
}
else
{
gchar *name = g_strdup_printf (_("Device not available: %s"),
g_strerror (errno));
g_object_set (controller, "name", name, NULL);
g_free (name);
}
}
else
{
g_object_set (controller, "name", _("No device configured"), NULL);
}
return FALSE;
}
static gboolean
linux_input_read_event (GIOChannel *io,
GIOCondition cond,
gpointer data)
{
ControllerLinuxInput *input = CONTROLLER_LINUX_INPUT (data);
GIOStatus status;
GError *error = NULL;
struct input_event ev;
gsize n_bytes;
gint i;
status = g_io_channel_read_chars (io,
(gchar *) &ev,
sizeof (struct input_event), &n_bytes,
&error);
switch (status)
{
case G_IO_STATUS_ERROR:
case G_IO_STATUS_EOF:
g_source_remove (input->io_id);
input->io_id = 0;
g_io_channel_unref (input->io);
input->io = NULL;
if (error)
{
gchar *name = g_strdup_printf (_("Device not available: %s"),
error->message);
g_object_set (input, "name", name, NULL);
g_free (name);
g_clear_error (&error);
}
else
{
g_object_set (input, "name", _("End of file"), NULL);
}
return FALSE;
break;
case G_IO_STATUS_AGAIN:
return TRUE;
default:
break;
}
if (n_bytes == sizeof (struct input_event))
{
switch (ev.type)
{
case EV_KEY:
for (i = 0; i < G_N_ELEMENTS (key_events); i++)
if (ev.code == key_events[i].code)
{
GimpController *controller = GIMP_CONTROLLER (data);
GimpControllerEvent cevent;
cevent.any.type = GIMP_CONTROLLER_EVENT_TRIGGER;
cevent.any.source = GIMP_CONTROLLER (data);
cevent.any.event_id = i;
gimp_controller_event (controller, &cevent);
break;
}
break;
case EV_REL:
for (i = 0; i < G_N_ELEMENTS (rel_events); i++)
if (ev.code == rel_events[i].code)
{
GimpController *controller = GIMP_CONTROLLER (data);
GimpControllerEvent cevent;
gint count;
cevent.any.type = GIMP_CONTROLLER_EVENT_TRIGGER;
cevent.any.source = controller;
cevent.any.event_id = G_N_ELEMENTS (key_events) + i;
for (count = ev.value; count < 0; count++)
gimp_controller_event (controller, &cevent);
cevent.any.event_id++;
for (count = ev.value; count > 0; count--)
gimp_controller_event (controller, &cevent);
break;
}
break;
default:
break;
}
}
return TRUE;
}
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