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(__FreeBSD__) || defined(__NetBSD__)
  28 #include <machine/apmvar.h>
  29 #include <err.h>
  30 #include <sys/ioctl.h>
  31 #include <unistd.h>
  32 #endif
  33
  34 #include "window.h"
  35 #include "server.h"
  36 #include "area.h"
  37 #include "panel.h"
  38 #include "taskbar.h"
  39 #include "battery.h"
  40 #include "clock.h"
  41 #include "timer.h"
  42 #include "common.h"
  43
  44 PangoFontDescription *bat1_font_desc;
  45 PangoFontDescription *bat2_font_desc;
  46 struct batstate battery_state;
  47 int battery_enabled;
  48 int percentage_hide;
  49 static timeout* battery_timeout;
  50
  51 static char buf_bat_percentage[10];
  52 static char buf_bat_time[20];
  53
  54 int8_t battery_low_status;
  55 unsigned char battery_low_cmd_send;
  56 char *battery_low_cmd;
  57 char *path_energy_now;
  58 char *path_energy_full;
  59 char *path_current_now;
  60 char *path_status;
  61
  62 #if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
  63 int apm_fd;
  64 #endif
  65
  66
  67 void update_batterys(void* arg)
  68 {
  69         int i;
  70         update_battery();
  71         for (i=0 ; i < nb_panel ; i++) {
  72                 if (battery_state.percentage >= percentage_hide) {
  73                         if (panel1[i].battery.area.on_screen == 1) {
  74                                 panel1[i].battery.area.on_screen = 0;
  75                                 // force resize on panel
  76                                 panel1[i].area.resize = 1;
  77                                 panel_refresh = 1;
  78                         }
  79                         continue;
  80                 }
  81                 else {
  82                         if (panel1[i].battery.area.on_screen == 0) {
  83                                 panel1[i].battery.area.on_screen = 1;
  84                                 // force resize on panel
  85                                 panel1[i].area.resize = 1;
  86                                 panel_refresh = 1;
  87                         }
  88                 }
  89                 panel1[i].battery.area.resize = 1;
  90         }
  91 }
  92
  93 void default_battery()
  94 {
  95         battery_enabled = 0;
  96         percentage_hide = 101;
  97         battery_low_cmd_send = 0;
  98         battery_timeout = 0;
  99         bat1_font_desc = 0;
 100         bat2_font_desc = 0;
 101         battery_low_cmd = 0;
 102         path_energy_now = 0;
 103         path_energy_full = 0;
 104         path_current_now = 0;
 105         path_status = 0;
 106 #if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
 107         apm_fd = -1;
 108 #endif
 109 }
 110
 111 void cleanup_battery()
 112 {
 113         if (bat1_font_desc) pango_font_description_free(bat1_font_desc);
 114         if (bat2_font_desc) pango_font_description_free(bat2_font_desc);
 115         if (path_energy_now) g_free(path_energy_now);
 116         if (path_energy_full) g_free(path_energy_full);
 117         if (path_current_now) g_free(path_current_now);
 118         if (path_status) g_free(path_status);
 119         if (battery_low_cmd) g_free(battery_low_cmd);
 120
 121 #if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
 122         if ((apm_fd != -1) && (close(apm_fd) == -1))
 123                 warn("cannot close /dev/apm");
 124 #endif
 125 }
 126
 127
 128 void init_battery()
 129 {
 130         if (!battery_enabled) return;
 131
 132 #if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
 133         apm_fd = open("/dev/apm", O_RDONLY);
 134         if (apm_fd < 0) {
 135                 warn("init_battery: failed to open /dev/apm.");
 136                 battery_enabled = 0;
 137                 return;
 138         }
 139
 140 #else
 141         // check battery
 142         GDir *directory = 0;
 143         GError *error = NULL;
 144         const char *entryname;
 145         char *battery_dir = 0;
 146
 147         directory = g_dir_open("/sys/class/power_supply", 0, &error);
 148         if (error)
 149                 g_error_free(error);
 150         else {
 151                 while ((entryname=g_dir_read_name(directory))) {
 152                         if (strncmp(entryname,"AC", 2) == 0) continue;
 153
 154                         char *path1 = g_build_filename("/sys/class/power_supply", entryname, "present", NULL);
 155                         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 156                                 g_free(path1);
 157                                 battery_dir = g_build_filename("/sys/class/power_supply", entryname, NULL);
 158                                 break;
 159                         }
 160                         g_free(path1);
 161                 }
 162         }
 163         if (directory)
 164                 g_dir_close(directory);
 165         if (!battery_dir) {
 166                 fprintf(stderr, "ERROR: battery applet can't found power_supply\n");
 167                 default_battery();
 168                 return;
 169         }
 170
 171         char *path1 = g_build_filename(battery_dir, "energy_now", NULL);
 172         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 173                 path_energy_now = g_build_filename(battery_dir, "energy_now", NULL);
 174                 path_energy_full = g_build_filename(battery_dir, "energy_full", NULL);
 175         }
 176         else {
 177                 char *path2 = g_build_filename(battery_dir, "charge_now", NULL);
 178                 if (g_file_test (path2, G_FILE_TEST_EXISTS)) {
 179                         path_energy_now = g_build_filename(battery_dir, "charge_now", NULL);
 180                         path_energy_full = g_build_filename(battery_dir, "charge_full", NULL);
 181                 }
 182                 else {
 183                         fprintf(stderr, "ERROR: can't found energy_* or charge_*\n");
 184                 }
 185                 g_free(path2);
 186         }
 187         if (path_energy_now && path_energy_full) {
 188                 path_current_now = g_build_filename(battery_dir, "current_now", NULL);
 189                 path_status = g_build_filename(battery_dir, "status", NULL);
 190
 191                 // check file
 192                 FILE *fp1, *fp2, *fp3, *fp4;
 193                 fp1 = fopen(path_energy_now, "r");
 194                 fp2 = fopen(path_energy_full, "r");
 195                 fp3 = fopen(path_current_now, "r");
 196                 fp4 = fopen(path_status, "r");
 197                 if (fp1 == NULL || fp2 == NULL || fp3 == NULL || fp4 == NULL) {
 198                         cleanup_battery();
 199                         default_battery();
 200                         fprintf(stderr, "ERROR: battery applet can't open energy_now\n");
 201                 }
 202                 fclose(fp1);
 203                 fclose(fp2);
 204                 fclose(fp3);
 205                 fclose(fp4);
 206         }
 207
 208         g_free(path1);
 209         g_free(battery_dir);
 210 #endif
 211
 212         if (battery_enabled && battery_timeout==0)
 213                 battery_timeout = add_timeout(10, 10000, update_batterys, 0);
 214 }
 215
 216
 217 void init_battery_panel(void *p)
 218 {
 219         Panel *panel = (Panel*)p;
 220         Battery *battery = &panel->battery;
 221         int bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
 222
 223         if (!battery_enabled)
 224                 return;
 225
 226         battery->area.parent = p;
 227         battery->area.panel = p;
 228         battery->area._draw_foreground = draw_battery;
 229         battery->area._resize = resize_battery;
 230         battery->area.resize = 1;
 231         battery->area.redraw = 1;
 232         battery->area.on_screen = 1;
 233
 234         update_battery(&battery_state);
 235         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 236         snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 237
 238         get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
 239         get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
 240
 241         if (panel_horizontal) {
 242                 // panel horizonal => fixed height and posy
 243                 battery->area.posy = panel->area.bg->border.width + panel->area.paddingy;
 244                 battery->area.height = panel->area.height - (2 * battery->area.posy);
 245         }
 246         else {
 247                 // panel vertical => fixed width, height, posy and posx
 248                 battery->area.posy = panel->clock.area.posy + panel->clock.area.height + panel->area.paddingx;
 249                 battery->area.height = (2 * battery->area.paddingxlr) + (bat_time_height + bat_percentage_height);
 250                 battery->area.posx = panel->area.bg->border.width + panel->area.paddingy;
 251                 battery->area.width = panel->area.width - (2 * panel->area.bg->border.width) - (2 * panel->area.paddingy);
 252         }
 253
 254         battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
 255         battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
 256         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;
 257 }
 258
 259
 260 void update_battery() {
 261 #if !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__NetBSD__)
 262         // unused on OpenBSD, silence compiler warnings
 263         FILE *fp;
 264         char tmp[25];
 265         int64_t current_now = 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(__FreeBSD__) || 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 #else
 302         fp = fopen(path_status, "r");
 303         if(fp != NULL) {
 304                 if (fgets(tmp, sizeof tmp, fp)) {
 305                         battery_state.state = BATTERY_UNKNOWN;
 306                         if(strcasecmp(tmp, "Charging\n")==0) battery_state.state = BATTERY_CHARGING;
 307                         if(strcasecmp(tmp, "Discharging\n")==0) battery_state.state = BATTERY_DISCHARGING;
 308                         if(strcasecmp(tmp, "Full\n")==0) battery_state.state = BATTERY_FULL;
 309                 }
 310                 fclose(fp);
 311         }
 312
 313         fp = fopen(path_energy_now, "r");
 314         if(fp != NULL) {
 315                 if (fgets(tmp, sizeof tmp, fp)) energy_now = atoi(tmp);
 316                 fclose(fp);
 317         }
 318
 319         fp = fopen(path_energy_full, "r");
 320         if(fp != NULL) {
 321                 if (fgets(tmp, sizeof tmp, fp)) energy_full = atoi(tmp);
 322                 fclose(fp);
 323         }
 324
 325         fp = fopen(path_current_now, "r");
 326         if(fp != NULL) {
 327                 if (fgets(tmp, sizeof tmp, fp)) current_now = atoi(tmp);
 328                 fclose(fp);
 329         }
 330
 331         if(current_now > 0) {
 332                 switch(battery_state.state) {
 333                         case BATTERY_CHARGING:
 334                                 seconds = 3600 * (energy_full - energy_now) / current_now;
 335                                 break;
 336                         case BATTERY_DISCHARGING:
 337                                 seconds = 3600 * energy_now / current_now;
 338                                 break;
 339                         default:
 340                                 seconds = 0;
 341                                 break;
 342                 }
 343         } else seconds = 0;
 344 #endif
 345
 346         battery_state.time.hours = seconds / 3600;
 347         seconds -= 3600 * battery_state.time.hours;
 348         battery_state.time.minutes = seconds / 60;
 349         seconds -= 60 * battery_state.time.minutes;
 350         battery_state.time.seconds = seconds;
 351
 352         if(energy_full > 0)
 353                 new_percentage = (energy_now*100)/energy_full;
 354
 355         if(battery_low_status > new_percentage && battery_state.state == BATTERY_DISCHARGING && !battery_low_cmd_send) {
 356                 tint_exec(battery_low_cmd);
 357                 battery_low_cmd_send = 1;
 358         }
 359         if(battery_low_status < new_percentage && battery_state.state == BATTERY_CHARGING && battery_low_cmd_send) {
 360                 battery_low_cmd_send = 0;
 361         }
 362
 363         battery_state.percentage = new_percentage;
 364
 365         // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
 366         if(battery_state.percentage > 100) {
 367                 battery_state.percentage = 100;
 368         }
 369 }
 370
 371
 372 void draw_battery (void *obj, cairo_t *c)
 373 {
 374         Battery *battery = obj;
 375         PangoLayout *layout;
 376
 377         layout = pango_cairo_create_layout (c);
 378
 379         // draw layout
 380         pango_layout_set_font_description(layout, bat1_font_desc);
 381         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 382         pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 383         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 384
 385         cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
 386
 387         pango_cairo_update_layout(c, layout);
 388         cairo_move_to(c, 0, battery->bat1_posy);
 389         pango_cairo_show_layout(c, layout);
 390
 391         pango_layout_set_font_description(layout, bat2_font_desc);
 392         pango_layout_set_indent(layout, 0);
 393         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 394         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 395
 396         pango_cairo_update_layout(c, layout);
 397         cairo_move_to(c, 0, battery->bat2_posy);
 398         pango_cairo_show_layout(c, layout);
 399
 400         g_object_unref(layout);
 401 }
 402
 403
 404 void resize_battery(void *obj)
 405 {
 406         Battery *battery = obj;
 407         PangoLayout *layout;
 408         int percentage_width, time_width, new_width;
 409
 410         percentage_width = time_width = 0;
 411         battery->area.redraw = 1;
 412
 413         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 414         if(battery_state.state == BATTERY_FULL) {
 415                 strcpy(buf_bat_time, "Full");
 416         } else {
 417                 snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 418         }
 419         // vertical panel doen't adjust width
 420         if (!panel_horizontal) return;
 421
 422         cairo_surface_t *cs;
 423         cairo_t *c;
 424         Pixmap pmap;
 425         pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
 426
 427         cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
 428         c = cairo_create(cs);
 429         layout = pango_cairo_create_layout(c);
 430
 431         // check width
 432         pango_layout_set_font_description(layout, bat1_font_desc);
 433         pango_layout_set_indent(layout, 0);
 434         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 435         pango_layout_get_pixel_size(layout, &percentage_width, NULL);
 436
 437         pango_layout_set_font_description(layout, bat2_font_desc);
 438         pango_layout_set_indent(layout, 0);
 439         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 440         pango_layout_get_pixel_size(layout, &time_width, NULL);
 441
 442         if(percentage_width > time_width) new_width = percentage_width;
 443         else new_width = time_width;
 444
 445         new_width += (2*battery->area.paddingxlr) + (2*battery->area.bg->border.width);
 446
 447         int old_width = battery->area.width;
 448
 449         Panel *panel = ((Area*)obj)->panel;
 450         battery->area.width = new_width + 1;
 451         battery->area.posx = panel->area.width - battery->area.width - panel->area.paddingxlr - panel->area.bg->border.width;
 452         if (panel->clock.area.on_screen)
 453                 battery->area.posx -= (panel->clock.area.width + panel->area.paddingx);
 454
 455         if(new_width > old_width || new_width < (old_width-6)) {
 456                 // refresh and resize other objects on panel
 457                 // we try to limit the number of refresh
 458                 // printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
 459                 panel->area.resize = 1;
 460                 systray.area.resize = 1;
 461                 panel_refresh = 1;
 462         }
 463
 464         g_object_unref (layout);
 465         cairo_destroy (c);
 466         cairo_surface_destroy (cs);
 467         XFreePixmap (server.dsp, pmap);
 468 }
 469