/************************************************************************
* This file is part of Paramano. *
* *
* Paramano 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 3 of the *
* License, or (at your option) any later version. *
* *
* Paramano 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 Paramano. If not, see *
* <http://www.gnu.org/licenses/>. *
************************************************************************/
#include "paramano.h"
static GtkStatusIcon* tray;
static char tooltip_text[1024];
int bat_num; // Shortcoming: we only detect one battery
char *CHARGE_VALUE_PATH, *CHARGE_STATE_PATH;
/***********************************************************************
* Return the battery level percentage
**********************************************************************/
int get_bat_percent()
{
return get_int_value_from_file(CHARGE_VALUE_PATH);
}
/***********************************************************************
* Return number of seconds until battery is fully charged/discharged
**********************************************************************/
long get_bat_seconds_left()
{
int now = 0;
int full = 0;
int rate = 0;
/* FIXME this now/full/rate logic has probably earned its own function.
* Not because of DRY, but just for readability's sake perhaps */
/* Kernel battery info is reported in one of two formats:
* - charge units
* - energy units
* Charge Units | Energy Units
* ------------------+---------------
* charge_now (µAh) | energy_now (µWh)
* charge_full (µAh) | energy_full (µWh)
* current_now (µA) | power_now (µW)
*
* Simple arithmetic produces the desired time value (time to fill, time
* to empty).
*
* If a valid (non-negative) value from energy_now is received, we assume
* all values are in energy units and proceed from there. If an invalid
* value is received, we assume all values are in charge units etc.
*/
/* Attempt to read current ENERGY level */
now = get_int_value_from_filef(POWERDIR"BAT%d/energy_now", bat_num);
/* FIXME battery's full charge/energy is only required when charging */
/* Energy units or charge units */
if (now >= 0)
{
debug("Energy units");
full = get_int_value_from_filef(POWERDIR"BAT%d/energy_full", bat_num);
rate = get_int_value_from_filef(POWERDIR"BAT%d/power_now", bat_num);
} else {
debug("Charge units");
full = get_int_value_from_filef(POWERDIR"BAT%d/charge_full", bat_num);
now = get_int_value_from_filef(POWERDIR"BAT%d/charge_now", bat_num);
rate = get_int_value_from_filef(POWERDIR"BAT%d/current_now", bat_num);
}
/* Note the '<=' for rate (we divide by rate) */
if (full < 0 ||
now < 0 ||
rate <= 0)
{
return -1;
}
switch(get_battery_state())
{
case STATE_CHARGING:
return (3600*(long long)(full - now))/rate;
break;
case STATE_DISCHARGING:
return (3600*(long long)now)/rate;
break;
default:
return -1;
}
}
/***********************************************************************
* Shows/updates the battery tray tooltip
**********************************************************************/
static gboolean show_tooltip(GtkStatusIcon* status_icon, gint x, gint y, gboolean keyboard_mode, GtkTooltip* tooltip, gpointer data)
{
gtk_tooltip_set_text(tooltip, tooltip_text);
return true;
}
/***********************************************************************
* Updates the battery tray tooltip's cached text
**********************************************************************/
static void update_tooltip_cache()
{
char* msg;
int seconds_left = get_bat_seconds_left();
char* time_left;
if (seconds_left == -1)
{
asprintf(&time_left, _("Unknown time left"));
} else {
asprintf(&time_left, _("%02d:%02d left"), (int)(seconds_left/3600), (int)((seconds_left%3600)/60));
}
switch(get_battery_state())
{
case STATE_DISCHARGING:
debug("Discharging\n");
asprintf(&msg, _("Discharging (%d%%)\n%s"), get_bat_percent(), time_left);
break;
case STATE_CHARGING:
debug("Charging\n");
asprintf(&msg, _("Charging (%d%%)\n%s"), get_bat_percent(), time_left);
break;
case STATE_CHARGED:
debug("Charged\n");
asprintf(&msg, _("Fully charged") );
break;
default:
debug("Unknown\n");
asprintf(&msg, _("Unknown status") );
break;
}
debug("Setting cached tooltip text to '%s'\n",msg);
strncpy(tooltip_text, msg, sizeof(tooltip_text));
free(time_left);
free(msg);
}
/***********************************************************************
* Updates the battery tray icon based upon battery percent
* Also updates the cached tooltip text
**********************************************************************/
static gboolean update()
{
char *icon_file;
unsigned int rounded;
rounded = 20* (int)((get_bat_percent()+10)/20); // Round percentage to 0, 20, 40, 60, 80 or 100
debug("Rounded/adjusted percentage: %d\n",rounded);
switch ( get_battery_state() )
{
case STATE_DISCHARGING:
asprintf(&icon_file,"%s/bat-%d.png",DEFAULT_THEME,rounded);
break;
case STATE_CHARGING:
asprintf(&icon_file,"%s/bat-%d-charging.png",DEFAULT_THEME,rounded);
break;
default:
asprintf(&icon_file,"%s/bat-charged.png",DEFAULT_THEME);
break;
}
update_tooltip_cache();
debug("Setting tray icon to '%s'\n",icon_file);
gtk_status_icon_set_from_file(tray, icon_file);
free(icon_file);
return true;
}
/***********************************************************************
* Initialise the tray and related variables
**********************************************************************/
void bat_tray_init()
{
char *icon_file;
// Get the battery number, store it for later
bat_num = get_bat_num();
// Set up battery info filenames/paths
asprintf(&CHARGE_VALUE_PATH, "/sys/class/power_supply/BAT%d/capacity", bat_num);
asprintf(&CHARGE_STATE_PATH, "/sys/class/power_supply/BAT%d/status", bat_num);
debug("Spawning new status icon\n");
tray = gtk_status_icon_new();
asprintf(&icon_file,"%s/bat-charged.png",DEFAULT_THEME);
gtk_status_icon_set_from_file(tray, icon_file);
free(icon_file);
gtk_status_icon_set_has_tooltip (tray, TRUE);
g_signal_connect(G_OBJECT(tray), "query-tooltip", GTK_SIGNAL_FUNC(show_tooltip), NULL);
g_timeout_add(120000, update, NULL);
/* Force something useful to be in the cached tooltip text,
* force meaningful icon */
update();
}
/***********************************************************************
* Free memory allocated in bat_tray_init()
**********************************************************************/
void bat_tray_end()
{
free(CHARGE_VALUE_PATH);
free(CHARGE_STATE_PATH);
}
/***********************************************************************
* Show the battery tray
**********************************************************************/
void bat_tray_show()
{
debug("Showing tray\n");
gtk_status_icon_set_visible(tray, TRUE);
}
/***********************************************************************
* Hide the battery tray
**********************************************************************/
void bat_tray_hide()
{
debug("Hiding tray\n");
gtk_status_icon_set_visible(tray, FALSE);
}
/***********************************************************************
* Return the battery state
**********************************************************************/
int get_battery_state()
{
char state[1024];
FILE* fd;
if (!(fd = fopen(CHARGE_STATE_PATH, "r")) ||
!fgets(state, sizeof(state), fd))
return STATE_UNKNOWN;
fclose(fd);
chomp(state);
if (strcmp(state, "Discharging") == 0)
{
debug("Battery discharging\n");
return STATE_DISCHARGING;
}
if (strcmp(state, "Full") == 0)
{
debug("Battery full\n");
return STATE_CHARGED;
}
if (strcmp(state, "Charging") == 0)
{
debug("Battery charging\n");
return STATE_CHARGING;
}
debug("Fallthrough: unknown status\n");
return STATE_UNKNOWN;
}
/***********************************************************************
* Get the number of the first (who has more than one?) battery
* Returns -1 if no battery present
**********************************************************************/
int get_bat_num()
{
FILE* fd;
char* file;
unsigned int i;
for(i = 0; i < 10; i++)
{
asprintf(&file, "/sys/class/power_supply/BAT%d/present", i);
if( (fd = fopen(file, "r")) )
{
debug("Found battery %d\n",i);
if (fgetc(fd) == '1')
{
debug("Battery %d is present\n",i);
fclose(fd);
free(file);
return i;
}
fclose(fd);
}
}
debug("Fallthrough: couldn't find battery\n");
free(file);
return -1;
}