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 #include "window.h"
  28 #include "server.h"
  29 #include "area.h"
  30 #include "panel.h"
  31 #include "taskbar.h"
  32 #include "battery.h"
  33 #include "clock.h"
  34 #include "timer.h"
  35
  36 PangoFontDescription *bat1_font_desc=0;
  37 PangoFontDescription *bat2_font_desc=0;
  38 struct batstate battery_state;
  39 int battery_enabled;
  40 int percentage_hide;
  41 static timeout* battery_timeout=0;
  42
  43 static char buf_bat_percentage[10];
  44 static char buf_bat_time[20];
  45
  46 int8_t battery_low_status;
  47 unsigned char battery_low_cmd_send;
  48 char *battery_low_cmd=0;
  49 char *path_energy_now=0;
  50 char *path_energy_full=0;
  51 char *path_current_now=0;
  52 char *path_status=0;
  53
  54 void update_batterys(void* arg)
  55 {
  56         int i;
  57         update_battery();
  58         for (i=0 ; i < nb_panel ; i++) {
  59                 if (battery_state.percentage >= percentage_hide) {
  60                         if (panel1[i].battery.area.on_screen == 1) {
  61                                 panel1[i].battery.area.on_screen = 0;
  62                                 // force resize on panel
  63                                 panel1[i].area.resize = 1;
  64                                 panel_refresh = 1;
  65                         }
  66                         continue;
  67                 }
  68                 else {
  69                         if (panel1[i].battery.area.on_screen == 0) {
  70                                 panel1[i].battery.area.on_screen = 1;
  71                                 // force resize on panel
  72                                 panel1[i].area.resize = 1;
  73                                 panel_refresh = 1;
  74                         }
  75                 }
  76                 panel1[i].battery.area.resize = 1;
  77         }
  78 }
  79
  80
  81 void init_battery()
  82 {
  83         // check battery
  84         GDir *directory = 0;
  85         GError *error = NULL;
  86         const char *entryname;
  87         char *battery_dir = 0;
  88
  89         if (!battery_enabled) return;
  90
  91         directory = g_dir_open("/sys/class/power_supply", 0, &error);
  92         if (error)
  93                 g_error_free(error);
  94         else {
  95                 while ((entryname=g_dir_read_name(directory))) {
  96                         if (strncmp(entryname,"AC", 2) == 0) continue;
  97
  98                         char *path1 = g_build_filename("/sys/class/power_supply", entryname, "present", NULL);
  99                         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 100                                 g_free(path1);
 101                                 battery_dir = g_build_filename("/sys/class/power_supply", entryname, NULL);
 102                                 break;
 103                         }
 104                         g_free(path1);
 105                 }
 106         }
 107         if (directory)
 108                 g_dir_close(directory);
 109         if (!battery_dir) {
 110                 cleanup_battery();
 111                 fprintf(stderr, "ERROR: battery applet can't found power_supply\n");
 112                 return;
 113         }
 114
 115         char *path1 = g_build_filename(battery_dir, "energy_now", NULL);
 116         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
 117                 path_energy_now = g_build_filename(battery_dir, "energy_now", NULL);
 118                 path_energy_full = g_build_filename(battery_dir, "energy_full", NULL);
 119         }
 120         else {
 121                 char *path2 = g_build_filename(battery_dir, "charge_now", NULL);
 122                 if (g_file_test (path2, G_FILE_TEST_EXISTS)) {
 123                         path_energy_now = g_build_filename(battery_dir, "charge_now", NULL);
 124                         path_energy_full = g_build_filename(battery_dir, "charge_full", NULL);
 125                 }
 126                 else {
 127                         fprintf(stderr, "ERROR: can't found energy_* or charge_*\n");
 128                 }
 129                 g_free(path2);
 130         }
 131         if (path_energy_now && path_energy_full) {
 132                 path_current_now = g_build_filename(battery_dir, "current_now", NULL);
 133                 path_status = g_build_filename(battery_dir, "status", NULL);
 134
 135                 // check file
 136                 FILE *fp1, *fp2, *fp3, *fp4;
 137                 fp1 = fopen(path_energy_now, "r");
 138                 fp2 = fopen(path_energy_full, "r");
 139                 fp3 = fopen(path_current_now, "r");
 140                 fp4 = fopen(path_status, "r");
 141                 if (fp1 == NULL || fp2 == NULL || fp3 == NULL || fp4 == NULL) {
 142                         cleanup_battery();
 143                         fprintf(stderr, "ERROR: battery applet can't open energy_now\n");
 144                 }
 145                 fclose(fp1);
 146                 fclose(fp2);
 147                 fclose(fp3);
 148                 fclose(fp4);
 149         }
 150
 151         g_free(path1);
 152         g_free(battery_dir);
 153
 154         if (battery_enabled && battery_timeout==0)
 155                 battery_timeout = add_timeout(10, 10000, update_batterys, 0);
 156 }
 157
 158
 159 void cleanup_battery()
 160 {
 161         battery_enabled = 0;
 162         percentage_hide = 101;
 163         battery_low_cmd_send = 0;
 164
 165         if (bat1_font_desc) {
 166                 pango_font_description_free(bat1_font_desc);
 167                 bat1_font_desc = 0;
 168         }
 169         if (bat2_font_desc) {
 170                 pango_font_description_free(bat2_font_desc);
 171                 bat2_font_desc = 0;
 172         }
 173         if (path_energy_now) {
 174                 g_free(path_energy_now);
 175                 path_energy_now = 0;
 176         }
 177         if (path_energy_full) {
 178                 g_free(path_energy_full);
 179                 path_energy_full = 0;
 180         }
 181         if (path_current_now) {
 182                 g_free(path_current_now);
 183                 path_current_now = 0;
 184         }
 185         if (path_status) {
 186                 g_free(path_status);
 187                 path_status = 0;
 188         }
 189         if (battery_low_cmd) {
 190                 g_free(battery_low_cmd);
 191                 battery_low_cmd = 0;
 192         }
 193 }
 194
 195
 196 void init_battery_panel(void *p)
 197 {
 198         Panel *panel = (Panel*)p;
 199         Battery *battery = &panel->battery;
 200         int bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
 201
 202         if (!battery_enabled)
 203                 return;
 204
 205         battery->area.parent = p;
 206         battery->area.panel = p;
 207         battery->area._draw_foreground = draw_battery;
 208         battery->area._resize = resize_battery;
 209         battery->area.resize = 1;
 210         battery->area.redraw = 1;
 211         battery->area.on_screen = 1;
 212
 213         update_battery(&battery_state);
 214         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 215         snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 216
 217         get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
 218         get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
 219
 220         if (panel_horizontal) {
 221                 // panel horizonal => fixed height and posy
 222                 battery->area.posy = panel->area.bg->border.width + panel->area.paddingy;
 223                 battery->area.height = panel->area.height - (2 * battery->area.posy);
 224         }
 225         else {
 226                 // panel vertical => fixed width, height, posy and posx
 227                 battery->area.posy = panel->clock.area.posy + panel->clock.area.height + panel->area.paddingx;
 228                 battery->area.height = (2 * battery->area.paddingxlr) + (bat_time_height + bat_percentage_height);
 229                 battery->area.posx = panel->area.bg->border.width + panel->area.paddingy;
 230                 battery->area.width = panel->area.width - (2 * panel->area.bg->border.width) - (2 * panel->area.paddingy);
 231         }
 232
 233         battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
 234         battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
 235         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;
 236 }
 237
 238
 239 void update_battery() {
 240         FILE *fp;
 241         char tmp[25];
 242         int64_t energy_now = 0, energy_full = 0, current_now = 0;
 243         int seconds = 0;
 244         int8_t new_percentage = 0;
 245
 246         fp = fopen(path_status, "r");
 247         if(fp != NULL) {
 248                 if (fgets(tmp, sizeof tmp, fp)) {
 249                         battery_state.state = BATTERY_UNKNOWN;
 250                         if(strcasecmp(tmp, "Charging\n")==0) battery_state.state = BATTERY_CHARGING;
 251                         if(strcasecmp(tmp, "Discharging\n")==0) battery_state.state = BATTERY_DISCHARGING;
 252                         if(strcasecmp(tmp, "Full\n")==0) battery_state.state = BATTERY_FULL;
 253                 }
 254                 fclose(fp);
 255         }
 256
 257         fp = fopen(path_energy_now, "r");
 258         if(fp != NULL) {
 259                 if (fgets(tmp, sizeof tmp, fp)) energy_now = atoi(tmp);
 260                 fclose(fp);
 261         }
 262
 263         fp = fopen(path_energy_full, "r");
 264         if(fp != NULL) {
 265                 if (fgets(tmp, sizeof tmp, fp)) energy_full = atoi(tmp);
 266                 fclose(fp);
 267         }
 268
 269         fp = fopen(path_current_now, "r");
 270         if(fp != NULL) {
 271                 if (fgets(tmp, sizeof tmp, fp)) current_now = atoi(tmp);
 272                 fclose(fp);
 273         }
 274
 275         if(current_now > 0) {
 276                 switch(battery_state.state) {
 277                         case BATTERY_CHARGING:
 278                                 seconds = 3600 * (energy_full - energy_now) / current_now;
 279                                 break;
 280                         case BATTERY_DISCHARGING:
 281                                 seconds = 3600 * energy_now / current_now;
 282                                 break;
 283                         default:
 284                                 seconds = 0;
 285                                 break;
 286                 }
 287         } else seconds = 0;
 288
 289         battery_state.time.hours = seconds / 3600;
 290         seconds -= 3600 * battery_state.time.hours;
 291         battery_state.time.minutes = seconds / 60;
 292         seconds -= 60 * battery_state.time.minutes;
 293         battery_state.time.seconds = seconds;
 294
 295         if(energy_full > 0)
 296                 new_percentage = (energy_now*100)/energy_full;
 297
 298         if(battery_low_status > new_percentage && battery_state.state == BATTERY_DISCHARGING && !battery_low_cmd_send) {
 299                         system(battery_low_cmd);  // return value == -1, since we've set SIGCHLD to SIGIGN
 300                         battery_low_cmd_send = 1;
 301         }
 302         if(battery_low_status < new_percentage && battery_state.state == BATTERY_CHARGING && battery_low_cmd_send) {
 303                 battery_low_cmd_send = 0;
 304         }
 305
 306         battery_state.percentage = new_percentage;
 307
 308         // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
 309         if(battery_state.percentage > 100) {
 310                 battery_state.percentage = 100;
 311         }
 312 }
 313
 314
 315 void draw_battery (void *obj, cairo_t *c)
 316 {
 317         Battery *battery = obj;
 318         PangoLayout *layout;
 319
 320         layout = pango_cairo_create_layout (c);
 321
 322         // draw layout
 323         pango_layout_set_font_description(layout, bat1_font_desc);
 324         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 325         pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 326         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 327
 328         cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
 329
 330         pango_cairo_update_layout(c, layout);
 331         cairo_move_to(c, 0, battery->bat1_posy);
 332         pango_cairo_show_layout(c, layout);
 333
 334         pango_layout_set_font_description(layout, bat2_font_desc);
 335         pango_layout_set_indent(layout, 0);
 336         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 337         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 338
 339         pango_cairo_update_layout(c, layout);
 340         cairo_move_to(c, 0, battery->bat2_posy);
 341         pango_cairo_show_layout(c, layout);
 342
 343         g_object_unref(layout);
 344 }
 345
 346
 347 void resize_battery(void *obj)
 348 {
 349         Battery *battery = obj;
 350         PangoLayout *layout;
 351         int percentage_width, time_width, new_width;
 352
 353         percentage_width = time_width = 0;
 354         battery->area.redraw = 1;
 355
 356         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 357         if(battery_state.state == BATTERY_FULL) {
 358                 strcpy(buf_bat_time, "Full");
 359         } else {
 360                 snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 361         }
 362         // vertical panel doen't adjust width
 363         if (!panel_horizontal) return;
 364
 365         cairo_surface_t *cs;
 366         cairo_t *c;
 367         Pixmap pmap;
 368         pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
 369
 370         cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
 371         c = cairo_create(cs);
 372         layout = pango_cairo_create_layout(c);
 373
 374         // check width
 375         pango_layout_set_font_description(layout, bat1_font_desc);
 376         pango_layout_set_indent(layout, 0);
 377         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 378         pango_layout_get_pixel_size(layout, &percentage_width, NULL);
 379
 380         pango_layout_set_font_description(layout, bat2_font_desc);
 381         pango_layout_set_indent(layout, 0);
 382         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 383         pango_layout_get_pixel_size(layout, &time_width, NULL);
 384
 385         if(percentage_width > time_width) new_width = percentage_width;
 386         else new_width = time_width;
 387
 388         new_width += (2*battery->area.paddingxlr) + (2*battery->area.bg->border.width);
 389
 390         int old_width = battery->area.width;
 391
 392         Panel *panel = ((Area*)obj)->panel;
 393         battery->area.width = new_width + 1;
 394         battery->area.posx = panel->area.width - battery->area.width - panel->area.paddingxlr - panel->area.bg->border.width;
 395         if (panel->clock.area.on_screen)
 396                 battery->area.posx -= (panel->clock.area.width + panel->area.paddingx);
 397
 398         if(new_width > old_width || new_width < (old_width-6)) {
 399                 // refresh and resize other objects on panel
 400                 // we try to limit the number of refresh
 401                 // printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
 402                 panel->area.resize = 1;
 403                 systray.area.resize = 1;
 404                 panel_refresh = 1;
 405         }
 406
 407         g_object_unref (layout);
 408         cairo_destroy (c);
 409         cairo_surface_destroy (cs);
 410         XFreePixmap (server.dsp, pmap);
 411 }
 412