/************************************************************************ * 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 * * . * ************************************************************************/ #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) { 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 { 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: asprintf(&msg, _("Discharging (%d%%)\n%s"), get_bat_percent(), time_left); break; case STATE_CHARGING: asprintf(&msg, _("Charging (%d%%)\n%s"), get_bat_percent(), time_left); break; case STATE_CHARGED: asprintf(&msg, _("Fully charged") ); break; default: asprintf(&msg, _("Unknown status") ); break; } 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 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(); 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); 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() { gtk_status_icon_set_visible(tray, TRUE); } /*********************************************************************** * Hide the battery tray **********************************************************************/ void bat_tray_hide() { 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) return STATE_DISCHARGING; if (strcmp(state, "Full") == 0) return STATE_CHARGED; if (strcmp(state, "Charging") == 0) return STATE_CHARGING; 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")) ) { if (fgetc(fd) == '1') { fclose(fd); free(file); return i; } fclose(fd); } } free(file); return -1; }