#include "bat_tray.h" #include "common.h" #include "defaults.h" #include #include #include #include static GtkStatusIcon* tray; static char tooltip_text[1024]; static int old_rounded; static int bat_num; // Shortcoming: we only detect one battery static char CHARGE_VALUE_PATH[1024]; static char CHARGE_STATE_PATH[1024]; /*********************************************************************** * Return the battery level percentage **********************************************************************/ int get_bat_percent() { return get_int_value_from_file(CHARGE_VALUE_PATH); } /*********************************************************************** * Get battery level percentage, rounded to one of: 0, 20, 40, 60, 80 * or 100. These values match the icon files **********************************************************************/ int get_bat_percent_rounded() { int rounded = 0; rounded = 20 * (int)((get_bat_percent() + 10) / 20); /* cap rounded value to safe bounds */ if (rounded < 0) rounded = 0; if (rounded > 100) rounded = 100; return rounded; } /*********************************************************************** * 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[512]; char time_left[64]; int seconds_left = get_bat_seconds_left(); if (seconds_left < 0) snprintf(time_left, sizeof(time_left), _("Unknown time left")); else snprintf(time_left, sizeof(time_left), _("%02d:%02d left"), (int)(seconds_left/3600), (int)((seconds_left%3600)/60)); switch (get_battery_state()) { case STATE_DISCHARGING: snprintf(msg, sizeof(msg), _("Discharging (%d%%)\n%s"), get_bat_percent(), time_left); break; case STATE_CHARGING: snprintf(msg, sizeof(msg), _("Charging (%d%%)\n%s"), get_bat_percent(), time_left); break; case STATE_CHARGED: snprintf(msg, sizeof(msg), _("Fully charged") ); break; default: snprintf(msg, sizeof(msg), _("Unknown status") ); break; } strncpy(tooltip_text, msg, sizeof(tooltip_text)); tooltip_text[sizeof(tooltip_text)-1] = '\0'; } /*********************************************************************** * Updates the battery tray icon based upon battery percent * Also updates the cached tooltip text **********************************************************************/ static gboolean update() { char icon_file[1024]; int rounded = 0; update_tooltip_cache(); /* if rounded hasn't changed, don't spend time changing icon */ rounded = get_bat_percent_rounded(); if (rounded == old_rounded) { return true; } switch (get_battery_state()) { case STATE_DISCHARGING: snprintf(icon_file, sizeof(icon_file), "%s/bat-%d.png", DEFAULT_THEME, rounded); break; case STATE_CHARGING: snprintf(icon_file, sizeof(icon_file), "%s/bat-%d-charging.png", DEFAULT_THEME, rounded); break; default: snprintf(icon_file, sizeof(icon_file), "%s/bat-charged.png", DEFAULT_THEME); break; } gtk_status_icon_set_from_file(tray, icon_file); return true; } /*********************************************************************** * Initialise the tray and related variables **********************************************************************/ void bat_tray_init() { char icon_file[1024]; /* Get the battery number, store it for later */ bat_num = get_bat_num(); /* Set up battery info filenames/paths */ snprintf(CHARGE_VALUE_PATH, sizeof(CHARGE_STATE_PATH), "/sys/class/power_supply/BAT%d/capacity", bat_num); snprintf(CHARGE_STATE_PATH, sizeof(CHARGE_STATE_PATH), "/sys/class/power_supply/BAT%d/status", bat_num); tray = gtk_status_icon_new(); snprintf(icon_file, sizeof(icon_file), "%s/bat-charged.png", DEFAULT_THEME); gtk_status_icon_set_from_file(tray, 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(10000, update, NULL); /* trigger icon refresh in update() below */ old_rounded = get_bat_percent_rounded() - 1; /* pre-load cached tooltip text */ update(); } /*********************************************************************** * 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 = NULL; if (!(fd = fopen(CHARGE_STATE_PATH, "r"))) return STATE_UNKNOWN; if (!fgets(state, sizeof(state), fd)) { fclose(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 = NULL; char filename[1024]; int i = 0; for (i = 0; i < 10; i++) { snprintf(filename, sizeof(filename), "/sys/class/power_supply/BAT%d/present", i); if ((fd = fopen(filename, "r"))) { if (fgetc(fd) == '1') { fclose(fd); return i; } fclose(fd); } } return -1; }