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/* $Id: tvm-device.c 2364 2007-01-15 17:57:27Z benny $ */
/*-
* Copyright (c) 2007 Benedikt Meurer <benny@xfce.org>.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <dbus/dbus-glib-lowlevel.h>
#include <thunar-volman/tvm-block-device.h>
#include <thunar-volman/tvm-camera-device.h>
#include <thunar-volman/tvm-device.h>
#include <thunar-volman/tvm-input-device.h>
#include <thunar-volman/tvm-pda-device.h>
#include <thunar-volman/tvm-printer-device.h>
typedef struct _TvmDeviceHandler TvmDeviceHandler;
struct _TvmDeviceHandler
{
const gchar *capability;
TvmDeviceCallback callback;
};
static const TvmDeviceHandler handlers[] =
{
{ "block", tvm_block_device_added, },
{ "camera", tvm_camera_device_added, },
{ "input.keyboard", tvm_input_device_added, },
{ "input.mouse", tvm_input_device_added, },
{ "input.tablet", tvm_input_device_added, },
{ "pda", tvm_pda_device_added, },
{ "printer", tvm_printer_device_added, },
};
static gint
strptrcmp (gconstpointer strptr1,
gconstpointer strptr2)
{
return strcmp (*((const gchar **) strptr1),
*((const gchar **) strptr2));
}
/**
* tvm_device_added:
* @preferences : a #TvmPreferences.
* @udi : the HAL device UDI of the newly added device.
* @error : return location for errors or %NULL.
*
* Invoked whenever a new device is added, where @udi is the
* HAL device UDI of the device in question. Returns %FALSE if
* an unrecoverable error occurred, %TRUE otherwise.
*
* Return value: %FALSE in case of an unrecoverable error,
* %TRUE otherwise.
**/
gboolean
tvm_device_added (TvmPreferences *preferences,
const gchar *udi,
GError **error)
{
DBusConnection *connection;
LibHalContext *context;
DBusError derror;
GError *err = NULL;
gchar **capabilities;
gint n_capabilities;
gint i, j, n;
g_return_val_if_fail (exo_hal_udi_validate (udi, -1, NULL), FALSE);
g_return_val_if_fail (TVM_IS_PREFERENCES (preferences), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
/* try to allocate a new HAL context */
context = libhal_ctx_new ();
if (G_UNLIKELY (context == NULL))
{
/* out of memory */
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_NOMEM, g_strerror (ENOMEM));
return FALSE;
}
/* initialize D-Bus error */
dbus_error_init (&derror);
/* try to connect to the system bus */
connection = dbus_bus_get (DBUS_BUS_SYSTEM, &derror);
if (G_UNLIKELY (connection == NULL))
{
err0: /* release the HAL context */
libhal_ctx_free (context);
/* propagate the error */
dbus_set_g_error (error, &derror);
return FALSE;
}
/* setup the D-Bus connection for the GLib main loop */
dbus_connection_setup_with_g_main (connection, NULL);
/* setup the D-Bus connection for the HAL context */
libhal_ctx_set_dbus_connection (context, connection);
/* the HAL context now owns the connection */
dbus_connection_unref (connection);
/* try to initialize the HAL context */
if (!libhal_ctx_init (context, &derror))
goto err0;
/* query the capabilities of the device */
capabilities = libhal_device_get_property_strlist (context, udi, "info.capabilities", &derror);
if (G_UNLIKELY (capabilities == NULL))
{
/* shutdown the HAL context */
libhal_ctx_shutdown (context, NULL);
goto err0;
}
/* determine the number of capabilities */
n_capabilities = g_strv_length (capabilities);
/* sort the capabilities */
qsort (capabilities, n_capabilities, sizeof (*capabilities), strptrcmp);
/* try various handlers until one of them succeeds */
for (i = 0, j = 0; err == NULL && i < G_N_ELEMENTS (handlers) && j < n_capabilities; ++i)
{
/* search for a handler with the capability */
for (n = -1; j < n_capabilities; )
{
/* check if we have a match here */
n = strcmp (capabilities[j], handlers[i].capability);
if (G_LIKELY (n >= 0))
break;
++j;
}
/* check if we have a potential match */
if (n == 0)
{
/* try to handle the device */
if ((*handlers[i].callback) (preferences, context, udi, capabilities[j], &err))
break;
++j;
}
}
/* cleanup the capabilities */
libhal_free_string_array (capabilities);
/* shutdown the HAL context */
libhal_ctx_shutdown (context, NULL);
libhal_ctx_free (context);
/* check if we failed */
if (G_UNLIKELY (err != NULL))
{
/* propagate the error */
g_propagate_error (error, err);
return FALSE;
}
return TRUE;
}
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