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 i;
  71         update_battery();
  72         for (i=0 ; i < nb_panel ; i++) {
  73                 if (battery_state.percentage >= percentage_hide) {
  74                         if (panel1[i].battery.area.on_screen == 1) {
  75                                 panel1[i].battery.area.on_screen = 0;
  76                                 panel_refresh = 1;
  77                         }
  78                         continue;
  79                 }
  80                 else {
  81                         if (panel1[i].battery.area.on_screen == 0) {
  82                                 panel1[i].battery.area.on_screen = 1;
  83                                 panel_refresh = 1;
  84                         }
  85                 }
  86                 panel1[i].battery.area.resize = 1;
  87         }
  88 }
  89
  90 void default_battery()
  91 {
  92         battery_enabled = 0;
  93         percentage_hide = 101;
  94         battery_low_cmd_send = 0;
  95         battery_timeout = 0;
  96         bat1_font_desc = 0;
  97         bat2_font_desc = 0;
  98         battery_low_cmd = 0;
  99         path_energy_now = 0;
 100         path_energy_full = 0;
 101         path_current_now = 0;
 102         path_status = 0;
 103 #if defined(__OpenBSD__) || defined(__NetBSD__)
 104         apm_fd = -1;
 105 #endif
 106 }
 107
 108 void cleanup_battery()
 109 {
 110         if (bat1_font_desc) pango_font_description_free(bat1_font_desc);
 111         if (bat2_font_desc) pango_font_description_free(bat2_font_desc);
 112         if (path_energy_now) g_free(path_energy_now);
 113         if (path_energy_full) g_free(path_energy_full);
 114         if (path_current_now) g_free(path_current_now);
 115         if (path_status) g_free(path_status);
 116         if (battery_low_cmd) g_free(battery_low_cmd);
 117
 118 #if defined(__OpenBSD__) || defined(__NetBSD__)
 119         if ((apm_fd != -1) && (close(apm_fd) == -1))
 120                 warn("cannot close /dev/apm");
 121 #endif
 122 }
 123
 124
 125 void init_battery()
 126 {
 127         if (!battery_enabled) return;
 128
 129 #if defined(__OpenBSD__) || defined(__NetBSD__)
 130         apm_fd = open("/dev/apm", O_RDONLY);
 131         if (apm_fd < 0) {
 132                 warn("init_battery: failed to open /dev/apm.");
 133                 battery_enabled = 0;
 134                 return;
 135         }
 136
 137 #elif !defined(__FreeBSD__)
 138         // check battery
 139         GDir *directory = 0;
 140         GError *error = NULL;
 141         const char *entryname;
 142         char *battery_dir = 0;
 143
 144         directory = g_dir_open("/sys/class/power_supply", 0, &error);
 145         if (error)
 146                 g_error_free(error);
 147         else {
 148                 while ((entryname=g_dir_read_name(directory))) {
 149                         if (strncmp(entryname,"AC", 2) == 0) continue;
 150
 151                         char *path1 = g_build_filename("/sys/class/power_supply", entryname, "present", NULL);
 152                         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 153                                 g_free(path1);
 154                                 battery_dir = g_build_filename("/sys/class/power_supply", entryname, NULL);
 155                                 break;
 156                         }
 157                         g_free(path1);
 158                 }
 159         }
 160         if (directory)
 161                 g_dir_close(directory);
 162         if (!battery_dir) {
 163                 fprintf(stderr, "ERROR: battery applet can't found power_supply\n");
 164                 default_battery();
 165                 return;
 166         }
 167
 168         char *path1 = g_build_filename(battery_dir, "energy_now", NULL);
 169         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 170                 path_energy_now = g_build_filename(battery_dir, "energy_now", NULL);
 171                 path_energy_full = g_build_filename(battery_dir, "energy_full", NULL);
 172         }
 173         else {
 174                 char *path2 = g_build_filename(battery_dir, "charge_now", NULL);
 175                 if (g_file_test (path2, G_FILE_TEST_EXISTS)) {
 176                         path_energy_now = g_build_filename(battery_dir, "charge_now", NULL);
 177                         path_energy_full = g_build_filename(battery_dir, "charge_full", NULL);
 178                 }
 179                 else {
 180                         fprintf(stderr, "ERROR: can't found energy_* or charge_*\n");
 181                 }
 182                 g_free(path2);
 183         }
 184         if (path_energy_now && path_energy_full) {
 185                 path_current_now = g_build_filename(battery_dir, "current_now", NULL);
 186                 path_status = g_build_filename(battery_dir, "status", NULL);
 187
 188                 // check file
 189                 FILE *fp1, *fp2, *fp3, *fp4;
 190                 fp1 = fopen(path_energy_now, "r");
 191                 fp2 = fopen(path_energy_full, "r");
 192                 fp3 = fopen(path_current_now, "r");
 193                 fp4 = fopen(path_status, "r");
 194                 if (fp1 == NULL || fp2 == NULL || fp3 == NULL || fp4 == NULL) {
 195                         cleanup_battery();
 196                         default_battery();
 197                         fprintf(stderr, "ERROR: battery applet can't open energy_now\n");
 198                 }
 199                 fclose(fp1);
 200                 fclose(fp2);
 201                 fclose(fp3);
 202                 fclose(fp4);
 203         }
 204
 205         g_free(path1);
 206         g_free(battery_dir);
 207 #endif
 208
 209         if (battery_enabled && battery_timeout==0)
 210                 battery_timeout = add_timeout(10, 10000, update_batterys, 0);
 211 }
 212
 213
 214 void init_battery_panel(void *p)
 215 {
 216         Panel *panel = (Panel*)p;
 217         Battery *battery = &panel->battery;
 218         int bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
 219
 220         if (!battery_enabled)
 221                 return;
 222
 223         battery->area.parent = p;
 224         battery->area.panel = p;
 225         battery->area._draw_foreground = draw_battery;
 226         battery->area.size_mode = SIZE_BY_CONTENT;
 227         battery->area._resize = resize_battery;
 228         battery->area.resize = 1;
 229         battery->area.redraw = 1;
 230         battery->area.on_screen = 1;
 231
 232         update_battery(&battery_state);
 233         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 234         snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 235
 236         get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
 237         get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
 238
 239         if (panel_horizontal) {
 240                 // panel horizonal => fixed height and posy
 241                 battery->area.posy = panel->area.bg->border.width + panel->area.paddingy;
 242                 battery->area.height = panel->area.height - (2 * battery->area.posy);
 243         }
 244         else {
 245                 // panel vertical => fixed width, height, posy and posx
 246                 battery->area.posx = panel->area.bg->border.width + panel->area.paddingy;
 247                 battery->area.width = panel->area.width - (2 * panel->area.bg->border.width) - (2 * panel->area.paddingy);
 248         }
 249
 250         battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
 251         battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
 252         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;
 253 }
 254
 255
 256 void update_battery() {
 257 #if !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
 258         // unused on OpenBSD, silence compiler warnings
 259         FILE *fp;
 260         char tmp[25];
 261         int64_t current_now = 0;
 262 #endif
 263 #if defined(__FreeBSD__)
 264         int sysctl_out =  0;
 265         size_t len = 0;
 266 #endif
 267         int64_t energy_now = 0, energy_full = 0;
 268         int seconds = 0;
 269         int8_t new_percentage = 0;
 270
 271 #if defined(__OpenBSD__) || defined(__NetBSD__)
 272         struct apm_power_info info;
 273         if (ioctl(apm_fd, APM_IOC_GETPOWER, &(info)) < 0)
 274                 warn("power update: APM_IOC_GETPOWER");
 275
 276         // best attempt at mapping to linux battery states
 277         battery_state.state = BATTERY_UNKNOWN;
 278         switch (info.battery_state) {
 279                 case APM_BATT_CHARGING:
 280                         battery_state.state = BATTERY_CHARGING;
 281                         break;
 282                 default:
 283                         battery_state.state = BATTERY_DISCHARGING;
 284                         break;
 285         }
 286
 287         if (info.battery_life == 100)
 288                 battery_state.state = BATTERY_FULL;
 289
 290         // no mapping for openbsd really
 291         energy_full = 0;
 292         energy_now = 0;
 293
 294         if (info.minutes_left != -1)
 295                 seconds = info.minutes_left * 60;
 296         else
 297                 seconds = -1;
 298
 299         new_percentage = info.battery_life;
 300
 301 #elif defined(__FreeBSD__)
 302         len = sizeof(sysctl_out);
 303
 304         if (sysctlbyname("hw.acpi.battery.state", &sysctl_out, &len, NULL, 0) != 0)
 305                 fprintf(stderr, "power update: no such sysctl");
 306
 307         // attemp to map the battery state to linux
 308         battery_state.state = BATTERY_UNKNOWN;
 309
 310         switch(sysctl_out) {
 311                 case 1:
 312                         battery_state.state = BATTERY_DISCHARGING;
 313                         break;
 314                 case 2:
 315                         battery_state.state = BATTERY_CHARGING;
 316                         break;
 317                 default:
 318                         battery_state.state = BATTERY_FULL;
 319                         break;
 320         }
 321
 322         // no mapping for freebsd
 323         energy_full = 0;
 324         energy_now = 0;
 325
 326         if (sysctlbyname("hw.acpi.battery.time", &sysctl_out, &len, NULL, 0) != 0)
 327                 seconds = -1;
 328         else
 329                 seconds = sysctl_out * 60;
 330
 331         // charging or error
 332         if (seconds < 0)
 333                 seconds = 0;
 334
 335         if (sysctlbyname("hw.acpi.battery.life", &sysctl_out, &len, NULL, 0) != 0)
 336                 new_percentage = -1;
 337         else
 338                 new_percentage = sysctl_out;
 339
 340 #else
 341         fp = fopen(path_status, "r");
 342         if(fp != NULL) {
 343                 if (fgets(tmp, sizeof tmp, fp)) {
 344                         battery_state.state = BATTERY_UNKNOWN;
 345                         if(strcasecmp(tmp, "Charging\n")==0) battery_state.state = BATTERY_CHARGING;
 346                         if(strcasecmp(tmp, "Discharging\n")==0) battery_state.state = BATTERY_DISCHARGING;
 347                         if(strcasecmp(tmp, "Full\n")==0) battery_state.state = BATTERY_FULL;
 348                 }
 349                 fclose(fp);
 350         }
 351
 352         fp = fopen(path_energy_now, "r");
 353         if(fp != NULL) {
 354                 if (fgets(tmp, sizeof tmp, fp)) energy_now = atoi(tmp);
 355                 fclose(fp);
 356         }
 357
 358         fp = fopen(path_energy_full, "r");
 359         if(fp != NULL) {
 360                 if (fgets(tmp, sizeof tmp, fp)) energy_full = atoi(tmp);
 361                 fclose(fp);
 362         }
 363
 364         fp = fopen(path_current_now, "r");
 365         if(fp != NULL) {
 366                 if (fgets(tmp, sizeof tmp, fp)) current_now = atoi(tmp);
 367                 fclose(fp);
 368         }
 369
 370         if(current_now > 0) {
 371                 switch(battery_state.state) {
 372                         case BATTERY_CHARGING:
 373                                 seconds = 3600 * (energy_full - energy_now) / current_now;
 374                                 break;
 375                         case BATTERY_DISCHARGING:
 376                                 seconds = 3600 * energy_now / current_now;
 377                                 break;
 378                         default:
 379                                 seconds = 0;
 380                                 break;
 381                 }
 382         } else seconds = 0;
 383 #endif
 384
 385         battery_state.time.hours = seconds / 3600;
 386         seconds -= 3600 * battery_state.time.hours;
 387         battery_state.time.minutes = seconds / 60;
 388         seconds -= 60 * battery_state.time.minutes;
 389         battery_state.time.seconds = seconds;
 390
 391         if(energy_full > 0)
 392                 new_percentage = (energy_now*100)/energy_full;
 393
 394         if(battery_low_status > new_percentage && battery_state.state == BATTERY_DISCHARGING && !battery_low_cmd_send) {
 395                 tint_exec(battery_low_cmd);
 396                 battery_low_cmd_send = 1;
 397         }
 398         if(battery_low_status < new_percentage && battery_state.state == BATTERY_CHARGING && battery_low_cmd_send) {
 399                 battery_low_cmd_send = 0;
 400         }
 401
 402         battery_state.percentage = new_percentage;
 403
 404         // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
 405         if(battery_state.percentage > 100) {
 406                 battery_state.percentage = 100;
 407         }
 408 }
 409
 410
 411 void draw_battery (void *obj, cairo_t *c)
 412 {
 413         Battery *battery = obj;
 414         PangoLayout *layout;
 415
 416         layout = pango_cairo_create_layout (c);
 417
 418         // draw layout
 419         pango_layout_set_font_description(layout, bat1_font_desc);
 420         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 421         pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 422         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 423
 424         cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
 425
 426         pango_cairo_update_layout(c, layout);
 427         cairo_move_to(c, 0, battery->bat1_posy);
 428         pango_cairo_show_layout(c, layout);
 429
 430         pango_layout_set_font_description(layout, bat2_font_desc);
 431         pango_layout_set_indent(layout, 0);
 432         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 433         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 434
 435         pango_cairo_update_layout(c, layout);
 436         cairo_move_to(c, 0, battery->bat2_posy);
 437         pango_cairo_show_layout(c, layout);
 438
 439         g_object_unref(layout);
 440 }
 441
 442
 443 int resize_battery(void *obj)
 444 {
 445         Battery *battery = obj;
 446         PangoLayout *layout;
 447         int percentage_width, time_width, new_width, ret = 0;
 448
 449         percentage_width = time_width = 0;
 450         battery->area.redraw = 1;
 451
 452         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 453         if(battery_state.state == BATTERY_FULL) {
 454                 strcpy(buf_bat_time, "Full");
 455         } else {
 456                 snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 457         }
 458         // vertical panel doen't adjust width
 459         if (!panel_horizontal) {
 460 //              battery->area.posy = panel->clock.area.posy + panel->clock.area.height + panel->area.paddingx;
 461 //              battery->area.height = (2 * battery->area.paddingxlr) + (bat_time_height + bat_percentage_height);
 462                 return ret;
 463         }
 464
 465         cairo_surface_t *cs;
 466         cairo_t *c;
 467         Pixmap pmap;
 468         pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
 469
 470         cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
 471         c = cairo_create(cs);
 472         layout = pango_cairo_create_layout(c);
 473
 474         // check width
 475         pango_layout_set_font_description(layout, bat1_font_desc);
 476         pango_layout_set_indent(layout, 0);
 477         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 478         pango_layout_get_pixel_size(layout, &percentage_width, NULL);
 479
 480         pango_layout_set_font_description(layout, bat2_font_desc);
 481         pango_layout_set_indent(layout, 0);
 482         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 483         pango_layout_get_pixel_size(layout, &time_width, NULL);
 484
 485         if(percentage_width > time_width) new_width = percentage_width;
 486         else new_width = time_width;
 487
 488         int old_width = battery->area.width;
 489
 490         new_width += (2*battery->area.paddingxlr) + (2*battery->area.bg->border.width);
 491         battery->area.width = new_width + 1;
 492
 493         if (new_width > old_width || new_width < (old_width-6)) {
 494                 // refresh and resize other objects on panel
 495                 // we try to limit the number of refresh
 496                 // printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
 497                 ret = 1;
 498         }
 499
 500         g_object_unref (layout);
 501         cairo_destroy (c);
 502         cairo_surface_destroy (cs);
 503         XFreePixmap (server.dsp, pmap);
 504         return ret;
 505 }
 506