Dogcows Code - chaz/tint2/blob - src/battery/battery.c

   1 /**************************************************************************
   2 *
   3 * Tint2 : battery
   4 *
   5 * Copyright (C) 2009 Sebastian Reichel <elektranox@gmail.com>
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License version 2
   9 * or any later version as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 **************************************************************************/
  19
  20 #include <string.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <cairo.h>
  24 #include <cairo-xlib.h>
  25 #include <pango/pangocairo.h>
  26
  27 #if defined(__OpenBSD__) || defined(__NetBSD__)
  28 #include <machine/apmvar.h>
  29 #include <err.h>
  30 #include <sys/ioctl.h>
  31 #include <unistd.h>
  32 #endif
  33
  34 #if defined(__FreeBSD__)
  35 #include <sys/types.h>
  36 #include <sys/sysctl.h>
  37 #endif
  38
  39 #include "window.h"
  40 #include "server.h"
  41 #include "panel.h"
  42 #include "battery.h"
  43 #include "timer.h"
  44 #include "common.h"
  45
  46 PangoFontDescription *bat1_font_desc;
  47 PangoFontDescription *bat2_font_desc;
  48 struct batstate battery_state;
  49 int battery_enabled;
  50 int percentage_hide;
  51 static timeout* battery_timeout;
  52
  53 static char buf_bat_percentage[10];
  54 static char buf_bat_time[20];
  55
  56 int8_t battery_low_status;
  57 unsigned char battery_low_cmd_send;
  58 char *battery_low_cmd;
  59 char *path_energy_now;
  60 char *path_energy_full;
  61 char *path_current_now;
  62 char *path_status;
  63
  64 #if defined(__OpenBSD__) || defined(__NetBSD__)
  65 int apm_fd;
  66 #endif
  67
  68 void update_batterys(void* arg)
  69 {
  70         int old_percentage = battery_state.percentage;
  71         int16_t old_hours = battery_state.time.hours;
  72         int8_t old_minutes = battery_state.time.minutes;
  73
  74         update_battery();
  75         if (old_percentage == battery_state.percentage && old_hours == battery_state.time.hours && old_minutes == battery_state.time.minutes)
  76                 return;
  77
  78         int i;
  79         for (i=0 ; i < nb_panel ; i++) {
  80                 if (battery_state.percentage >= percentage_hide) {
  81                         if (panel1[i].battery.area.on_screen == 1) {
  82                                 panel1[i].battery.area.on_screen = 0;
  83                                 panel1[i].area.resize = 1;
  84                                 panel_refresh = 1;
  85                         }
  86                 }
  87                 else {
  88                         if (panel1[i].battery.area.on_screen == 0) {
  89                                 panel1[i].battery.area.on_screen = 1;
  90                         }
  91                 }
  92                 if (panel1[i].battery.area.on_screen == 1) {
  93                         panel1[i].battery.area.resize = 1;
  94                         panel_refresh = 1;
  95                 }
  96         }
  97 }
  98
  99 void default_battery()
 100 {
 101         battery_enabled = 0;
 102         percentage_hide = 101;
 103         battery_low_cmd_send = 0;
 104         battery_timeout = 0;
 105         bat1_font_desc = 0;
 106         bat2_font_desc = 0;
 107         battery_low_cmd = 0;
 108         path_energy_now = 0;
 109         path_energy_full = 0;
 110         path_current_now = 0;
 111         path_status = 0;
 112         battery_state.percentage = 0;
 113         battery_state.time.hours = 0;
 114         battery_state.time.minutes = 0;
 115 #if defined(__OpenBSD__) || defined(__NetBSD__)
 116         apm_fd = -1;
 117 #endif
 118 }
 119
 120 void cleanup_battery()
 121 {
 122         if (bat1_font_desc) pango_font_description_free(bat1_font_desc);
 123         if (bat2_font_desc) pango_font_description_free(bat2_font_desc);
 124         if (path_energy_now) g_free(path_energy_now);
 125         if (path_energy_full) g_free(path_energy_full);
 126         if (path_current_now) g_free(path_current_now);
 127         if (path_status) g_free(path_status);
 128         if (battery_low_cmd) g_free(battery_low_cmd);
 129         if (battery_timeout) stop_timeout(battery_timeout);
 130
 131 #if defined(__OpenBSD__) || defined(__NetBSD__)
 132         if ((apm_fd != -1) && (close(apm_fd) == -1))
 133                 warn("cannot close /dev/apm");
 134 #endif
 135 }
 136
 137
 138 void init_battery()
 139 {
 140         if (!battery_enabled) return;
 141
 142 #if defined(__OpenBSD__) || defined(__NetBSD__)
 143         apm_fd = open("/dev/apm", O_RDONLY);
 144         if (apm_fd < 0) {
 145                 warn("init_battery: failed to open /dev/apm.");
 146                 battery_enabled = 0;
 147                 return;
 148         }
 149
 150 #elif !defined(__FreeBSD__)
 151         // check battery
 152         GDir *directory = 0;
 153         GError *error = NULL;
 154         const char *entryname;
 155         char *battery_dir = 0;
 156
 157         directory = g_dir_open("/sys/class/power_supply", 0, &error);
 158         if (error)
 159                 g_error_free(error);
 160         else {
 161                 while ((entryname=g_dir_read_name(directory))) {
 162                         if (strncmp(entryname,"AC", 2) == 0) continue;
 163
 164                         char *path1 = g_build_filename("/sys/class/power_supply", entryname, "present", NULL);
 165                         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 166                                 g_free(path1);
 167                                 battery_dir = g_build_filename("/sys/class/power_supply", entryname, NULL);
 168                                 break;
 169                         }
 170                         g_free(path1);
 171                 }
 172         }
 173         if (directory)
 174                 g_dir_close(directory);
 175         if (!battery_dir) {
 176                 fprintf(stderr, "ERROR: battery applet can't found power_supply\n");
 177                 default_battery();
 178                 return;
 179         }
 180
 181         char *path1 = g_build_filename(battery_dir, "energy_now", NULL);
 182         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 183                 path_energy_now = g_build_filename(battery_dir, "energy_now", NULL);
 184                 path_energy_full = g_build_filename(battery_dir, "energy_full", NULL);
 185         }
 186         else {
 187                 char *path2 = g_build_filename(battery_dir, "charge_now", NULL);
 188                 if (g_file_test (path2, G_FILE_TEST_EXISTS)) {
 189                         path_energy_now = g_build_filename(battery_dir, "charge_now", NULL);
 190                         path_energy_full = g_build_filename(battery_dir, "charge_full", NULL);
 191                 }
 192                 else {
 193                         fprintf(stderr, "ERROR: can't found energy_* or charge_*\n");
 194                 }
 195                 g_free(path2);
 196         }
 197         if (path_energy_now && path_energy_full) {
 198                 path_current_now = g_build_filename(battery_dir, "current_now", NULL);
 199                 path_status = g_build_filename(battery_dir, "status", NULL);
 200
 201                 // check file
 202                 FILE *fp1, *fp2, *fp3, *fp4;
 203                 fp1 = fopen(path_energy_now, "r");
 204                 fp2 = fopen(path_energy_full, "r");
 205                 fp3 = fopen(path_current_now, "r");
 206                 fp4 = fopen(path_status, "r");
 207                 if (fp1 == NULL || fp2 == NULL || fp3 == NULL || fp4 == NULL) {
 208                         cleanup_battery();
 209                         default_battery();
 210                         fprintf(stderr, "ERROR: battery applet can't open energy_now\n");
 211                 }
 212                 fclose(fp1);
 213                 fclose(fp2);
 214                 fclose(fp3);
 215                 fclose(fp4);
 216         }
 217
 218         g_free(path1);
 219         g_free(battery_dir);
 220 #endif
 221
 222         if (battery_enabled && battery_timeout==0)
 223                 battery_timeout = add_timeout(10, 10000, update_batterys, 0);
 224 }
 225
 226
 227 void init_battery_panel(void *p)
 228 {
 229         Panel *panel = (Panel*)p;
 230         Battery *battery = &panel->battery;
 231
 232         if (!battery_enabled)
 233                 return;
 234
 235         battery->area.parent = p;
 236         battery->area.panel = p;
 237         battery->area._draw_foreground = draw_battery;
 238         battery->area.size_mode = SIZE_BY_CONTENT;
 239         battery->area._resize = resize_battery;
 240         battery->area.resize = 1;
 241         battery->area.redraw = 1;
 242         battery->area.on_screen = 1;
 243 }
 244
 245
 246 void update_battery() {
 247 #if !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
 248         // unused on OpenBSD, silence compiler warnings
 249         FILE *fp;
 250         char tmp[25];
 251         int64_t current_now = 0;
 252 #endif
 253 #if defined(__FreeBSD__)
 254         int sysctl_out =  0;
 255         size_t len = 0;
 256 #endif
 257         int64_t energy_now = 0, energy_full = 0;
 258         int seconds = 0;
 259         int8_t new_percentage = 0;
 260
 261 #if defined(__OpenBSD__) || defined(__NetBSD__)
 262         struct apm_power_info info;
 263         if (ioctl(apm_fd, APM_IOC_GETPOWER, &(info)) < 0)
 264                 warn("power update: APM_IOC_GETPOWER");
 265
 266         // best attempt at mapping to linux battery states
 267         battery_state.state = BATTERY_UNKNOWN;
 268         switch (info.battery_state) {
 269                 case APM_BATT_CHARGING:
 270                         battery_state.state = BATTERY_CHARGING;
 271                         break;
 272                 default:
 273                         battery_state.state = BATTERY_DISCHARGING;
 274                         break;
 275         }
 276
 277         if (info.battery_life == 100)
 278                 battery_state.state = BATTERY_FULL;
 279
 280         // no mapping for openbsd really
 281         energy_full = 0;
 282         energy_now = 0;
 283
 284         if (info.minutes_left != -1)
 285                 seconds = info.minutes_left * 60;
 286         else
 287                 seconds = -1;
 288
 289         new_percentage = info.battery_life;
 290
 291 #elif defined(__FreeBSD__)
 292         len = sizeof(sysctl_out);
 293
 294         if (sysctlbyname("hw.acpi.battery.state", &sysctl_out, &len, NULL, 0) != 0)
 295                 fprintf(stderr, "power update: no such sysctl");
 296
 297         // attemp to map the battery state to linux
 298         battery_state.state = BATTERY_UNKNOWN;
 299
 300         switch(sysctl_out) {
 301                 case 1:
 302                         battery_state.state = BATTERY_DISCHARGING;
 303                         break;
 304                 case 2:
 305                         battery_state.state = BATTERY_CHARGING;
 306                         break;
 307                 default:
 308                         battery_state.state = BATTERY_FULL;
 309                         break;
 310         }
 311
 312         // no mapping for freebsd
 313         energy_full = 0;
 314         energy_now = 0;
 315
 316         if (sysctlbyname("hw.acpi.battery.time", &sysctl_out, &len, NULL, 0) != 0)
 317                 seconds = -1;
 318         else
 319                 seconds = sysctl_out * 60;
 320
 321         // charging or error
 322         if (seconds < 0)
 323                 seconds = 0;
 324
 325         if (sysctlbyname("hw.acpi.battery.life", &sysctl_out, &len, NULL, 0) != 0)
 326                 new_percentage = -1;
 327         else
 328                 new_percentage = sysctl_out;
 329
 330 #else
 331         fp = fopen(path_status, "r");
 332         if(fp != NULL) {
 333                 if (fgets(tmp, sizeof tmp, fp)) {
 334                         battery_state.state = BATTERY_UNKNOWN;
 335                         if(strcasecmp(tmp, "Charging\n")==0) battery_state.state = BATTERY_CHARGING;
 336                         if(strcasecmp(tmp, "Discharging\n")==0) battery_state.state = BATTERY_DISCHARGING;
 337                         if(strcasecmp(tmp, "Full\n")==0) battery_state.state = BATTERY_FULL;
 338                 }
 339                 fclose(fp);
 340         }
 341
 342         fp = fopen(path_energy_now, "r");
 343         if(fp != NULL) {
 344                 if (fgets(tmp, sizeof tmp, fp)) energy_now = atoi(tmp);
 345                 fclose(fp);
 346         }
 347
 348         fp = fopen(path_energy_full, "r");
 349         if(fp != NULL) {
 350                 if (fgets(tmp, sizeof tmp, fp)) energy_full = atoi(tmp);
 351                 fclose(fp);
 352         }
 353
 354         fp = fopen(path_current_now, "r");
 355         if(fp != NULL) {
 356                 if (fgets(tmp, sizeof tmp, fp)) current_now = atoi(tmp);
 357                 fclose(fp);
 358         }
 359
 360         if(current_now > 0) {
 361                 switch(battery_state.state) {
 362                         case BATTERY_CHARGING:
 363                                 seconds = 3600 * (energy_full - energy_now) / current_now;
 364                                 break;
 365                         case BATTERY_DISCHARGING:
 366                                 seconds = 3600 * energy_now / current_now;
 367                                 break;
 368                         default:
 369                                 seconds = 0;
 370                                 break;
 371                 }
 372         } else seconds = 0;
 373 #endif
 374
 375         battery_state.time.hours = seconds / 3600;
 376         seconds -= 3600 * battery_state.time.hours;
 377         battery_state.time.minutes = seconds / 60;
 378         seconds -= 60 * battery_state.time.minutes;
 379         battery_state.time.seconds = seconds;
 380
 381         if(energy_full > 0)
 382                 new_percentage = (energy_now*100)/energy_full;
 383
 384         if(battery_low_status > new_percentage && battery_state.state == BATTERY_DISCHARGING && !battery_low_cmd_send) {
 385                 tint_exec(battery_low_cmd);
 386                 battery_low_cmd_send = 1;
 387         }
 388         if(battery_low_status < new_percentage && battery_state.state == BATTERY_CHARGING && battery_low_cmd_send) {
 389                 battery_low_cmd_send = 0;
 390         }
 391
 392         battery_state.percentage = new_percentage;
 393
 394         // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
 395         if(battery_state.percentage > 100) {
 396                 battery_state.percentage = 100;
 397         }
 398 }
 399
 400
 401 void draw_battery (void *obj, cairo_t *c)
 402 {
 403         Battery *battery = obj;
 404         PangoLayout *layout;
 405
 406         layout = pango_cairo_create_layout (c);
 407
 408         // draw layout
 409         pango_layout_set_font_description(layout, bat1_font_desc);
 410         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 411         pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 412         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 413
 414         cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
 415
 416         pango_cairo_update_layout(c, layout);
 417         cairo_move_to(c, 0, battery->bat1_posy);
 418         pango_cairo_show_layout(c, layout);
 419
 420         pango_layout_set_font_description(layout, bat2_font_desc);
 421         pango_layout_set_indent(layout, 0);
 422         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 423         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 424
 425         pango_cairo_update_layout(c, layout);
 426         cairo_move_to(c, 0, battery->bat2_posy);
 427         pango_cairo_show_layout(c, layout);
 428
 429         g_object_unref(layout);
 430 }
 431
 432
 433 int resize_battery(void *obj)
 434 {
 435         Battery *battery = obj;
 436         Panel *panel = battery->area.panel;
 437         int bat_percentage_height, bat_percentage_width, bat_percentage_height_ink;
 438         int bat_time_height, bat_time_width, bat_time_height_ink;
 439         int ret = 0;
 440
 441         battery->area.redraw = 1;
 442
 443         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 444         if(battery_state.state == BATTERY_FULL) {
 445                 strcpy(buf_bat_time, "Full");
 446         } else {
 447                 snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 448         }
 449         get_text_size2(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, &bat_percentage_width, panel->area.height, panel->area.width, buf_bat_percentage, strlen(buf_bat_percentage));
 450         get_text_size2(bat2_font_desc, &bat_time_height_ink, &bat_time_height, &bat_time_width, panel->area.height, panel->area.width, buf_bat_time, strlen(buf_bat_time));
 451
 452         if (panel_horizontal) {
 453                 int new_size = (bat_percentage_width > bat_time_width) ? bat_percentage_width : bat_time_width;
 454                 new_size += (2*battery->area.paddingxlr) + (2*battery->area.bg->border.width);
 455                 if (new_size > battery->area.width || new_size < (battery->area.width-2)) {
 456                         // we try to limit the number of resize
 457                         battery->area.width =  new_size;
 458                         battery->bat1_posy = ((battery->area.height - bat_percentage_height) / 2) - ((bat_time_height_ink + 2) / 2);
 459                         battery->bat2_posy = battery->bat1_posy + bat_percentage_height + 2 - (bat_percentage_height - bat_percentage_height_ink)/2 - (bat_time_height - bat_time_height_ink)/2;
 460                         ret = 1;
 461                 }
 462         }
 463         else {
 464                 int new_size = bat_percentage_height + bat_time_height + (2 * (battery->area.paddingxlr + battery->area.bg->border.width));
 465                 if (new_size != battery->area.height) {
 466                         battery->area.height =  new_size;
 467                         battery->bat1_posy = ((battery->area.height - bat_percentage_height) / 2) - ((bat_time_height_ink + 2) / 2);
 468                         battery->bat2_posy = battery->bat1_posy + bat_percentage_height + 2 - (bat_percentage_height - bat_percentage_height_ink)/2 - (bat_time_height - bat_time_height_ink)/2;
 469                         ret = 1;
 470                 }
 471         }
 472
 473         return ret;
 474 }
 475