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/*
* Copyright 2014 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3, as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Yuan-Chen Cheng <yc.cheng@canonical.com>
*/
#include "ib-brightness-powerd-control.h"
static gboolean getBrightnessParams(GDBusProxy* powerd_proxy, int *min, int *max,
int *dflt, gboolean *ab_supported);
GDBusProxy*
powerd_get_proxy(brightness_params_t *params)
{
GError *error = NULL;
gboolean ret;
g_return_val_if_fail (params != NULL, NULL);
GDBusProxy* powerd_proxy = g_dbus_proxy_new_for_bus_sync(G_BUS_TYPE_SYSTEM,
G_DBUS_PROXY_FLAGS_NONE,
NULL,
"com.canonical.powerd",
"/com/canonical/powerd",
"com.canonical.powerd",
NULL,
&error);
if (error != NULL)
{
g_debug ("could not connect to powerd: %s", error->message);
g_error_free (error);
return NULL;
}
ret = getBrightnessParams(powerd_proxy, &(params->min), &(params->max),
&(params->dflt), &(params->ab_supported));
if (! ret)
{
g_debug ("can't get brightness parameters from powerd");
g_object_unref (powerd_proxy);
return NULL;
}
return powerd_proxy;
}
static gboolean
getBrightnessParams(GDBusProxy* powerd_proxy, int *min, int *max, int *dflt, gboolean *ab_supported)
{
GVariant *ret = NULL;
GError *error = NULL;
ret = g_dbus_proxy_call_sync(powerd_proxy,
"getBrightnessParams",
NULL,
G_DBUS_CALL_FLAGS_NONE,
400, NULL, &error); // timeout: 400 ms
if (!ret)
{
if (error != NULL)
{
if (!g_error_matches(error, G_DBUS_ERROR, G_DBUS_ERROR_SERVICE_UNKNOWN))
{
g_warning("getBrightnessParams from powerd failed: %s", error->message);
}
g_error_free(error);
}
return FALSE;
}
g_variant_get(ret, "((iiib))", min, max, dflt, ab_supported);
g_variant_unref(ret);
return TRUE;
}
static gboolean setUserBrightness(GDBusProxy* powerd_proxy, GCancellable *gcancel, int brightness)
{
GVariant *ret = NULL;
GError *error = NULL;
ret = g_dbus_proxy_call_sync(powerd_proxy,
"setUserBrightness",
g_variant_new("(i)", brightness),
G_DBUS_CALL_FLAGS_NONE,
-1, gcancel, &error);
if (!ret) {
g_warning("setUserBrightness via powerd failed: %s", error->message);
g_error_free(error);
return FALSE;
} else {
g_variant_unref(ret);
return TRUE;
}
}
struct _IbBrightnessPowerdControl
{
GDBusProxy *powerd_proxy;
GCancellable *gcancel;
int min;
int max;
int dflt; // defalut value
gboolean ab_supported;
int current;
};
IbBrightnessPowerdControl*
ib_brightness_powerd_control_new (GDBusProxy* powerd_proxy, brightness_params_t params)
{
IbBrightnessPowerdControl *control;
control = g_new0 (IbBrightnessPowerdControl, 1);
control->powerd_proxy = powerd_proxy;
control->gcancel = g_cancellable_new();
control->min = params.min;
control->max = params.max;
control->dflt = params.dflt;
control->ab_supported = params.ab_supported;
// XXX: set the brightness value is the only way to sync the brightness value with
// powerd, and we should set the user prefered / last set brightness value upon startup.
// Before we have code to store last set brightness value or other mechanism, we set
// it to default brightness that powerd proposed.
ib_brightness_powerd_control_set_value(control, control->dflt);
return control;
}
void
ib_brightness_powerd_control_set_value (IbBrightnessPowerdControl* self, gint value)
{
gboolean ret;
value = CLAMP(value, self->min, self->max);
ret = setUserBrightness(self->powerd_proxy, self->gcancel, value);
if (ret)
{
self->current = value;
}
}
gint
ib_brightness_powerd_control_get_value (IbBrightnessPowerdControl* self)
{
return self->current;
}
gint
ib_brightness_powerd_control_get_max_value (IbBrightnessPowerdControl* self)
{
return self->max;
}
void
ib_brightness_powerd_control_free (IbBrightnessPowerdControl *self)
{
g_cancellable_cancel (self->gcancel);
g_object_unref (self->gcancel);
g_object_unref (self->powerd_proxy);
g_free (self);
}
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