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 static const struct timeout* battery_timeout=0;
  41
  42 static char buf_bat_percentage[10];
  43 static char buf_bat_time[20];
  44
  45 int8_t battery_low_status;
  46 char *battery_low_cmd=0;
  47 unsigned char battery_low_cmd_send=0;
  48 char *path_energy_now=0;
  49 char *path_energy_full=0;
  50 char *path_current_now=0;
  51 char *path_status=0;
  52
  53 void update_batterys(void* arg)
  54 {
  55         int i;
  56         update_battery();
  57         for (i=0 ; i < nb_panel ; i++)
  58                 panel1[i].battery.area.resize = 1;
  59 }
  60
  61
  62 void init_battery()
  63 {
  64         // check battery
  65         GDir *directory = 0;
  66         GError *error = NULL;
  67         const char *entryname;
  68         char *battery_dir = 0;
  69
  70         if (!battery_enabled) return;
  71
  72         directory = g_dir_open("/sys/class/power_supply", 0, &error);
  73         if (error)
  74                 g_error_free(error);
  75         else {
  76                 while ((entryname=g_dir_read_name(directory))) {
  77                         if (strncmp(entryname,"AC", 2) == 0) continue;
  78
  79                         char *path1 = g_build_filename("/sys/class/power_supply", entryname, "present", NULL);
  80                         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
  81                                 g_free(path1);
  82                                 battery_dir = g_build_filename("/sys/class/power_supply", entryname, NULL);
  83                                 break;
  84                         }
  85                         g_free(path1);
  86                 }
  87         }
  88         if (directory)
  89                 g_dir_close(directory);
  90         if (!battery_dir) {
  91                 cleanup_battery();
  92                 fprintf(stderr, "ERROR: battery applet can't found power_supply\n");
  93                 return;
  94         }
  95
  96         char *path1 = g_build_filename(battery_dir, "energy_now", NULL);
  97         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
  98                 path_energy_now = g_build_filename(battery_dir, "energy_now", NULL);
  99                 path_energy_full = g_build_filename(battery_dir, "energy_full", NULL);
 100         }
 101         else {
 102                 char *path2 = g_build_filename(battery_dir, "charge_now", NULL);
 103                 if (g_file_test (path2, G_FILE_TEST_EXISTS)) {
 104                         path_energy_now = g_build_filename(battery_dir, "charge_now", NULL);
 105                         path_energy_full = g_build_filename(battery_dir, "charge_full", NULL);
 106                 }
 107                 else {
 108                         fprintf(stderr, "ERROR: can't found energy_* or charge_*\n");
 109                 }
 110                 g_free(path2);
 111         }
 112         if (path_energy_now && path_energy_full) {
 113                 path_current_now = g_build_filename(battery_dir, "current_now", NULL);
 114                 path_status = g_build_filename(battery_dir, "status", NULL);
 115
 116                 // check file
 117                 FILE *fp1, *fp2, *fp3, *fp4;
 118                 fp1 = fopen(path_energy_now, "r");
 119                 fp2 = fopen(path_energy_full, "r");
 120                 fp3 = fopen(path_current_now, "r");
 121                 fp4 = fopen(path_status, "r");
 122                 if (fp1 == NULL || fp2 == NULL || fp3 == NULL || fp4 == NULL) {
 123                         cleanup_battery();
 124                         fprintf(stderr, "ERROR: battery applet can't open energy_now\n");
 125                 }
 126                 fclose(fp1);
 127                 fclose(fp2);
 128                 fclose(fp3);
 129                 fclose(fp4);
 130         }
 131
 132         g_free(path1);
 133         g_free(battery_dir);
 134
 135         if (battery_enabled && battery_timeout==0)
 136                 battery_timeout = add_timeout(10, 5000, update_batterys, 0);
 137 }
 138
 139
 140 void cleanup_battery()
 141 {
 142         battery_enabled = 0;
 143         if (bat1_font_desc)
 144                 pango_font_description_free(bat1_font_desc);
 145         if (bat2_font_desc)
 146                 pango_font_description_free(bat2_font_desc);
 147         if (path_energy_now)
 148                 g_free(path_energy_now);
 149         if (path_energy_full)
 150                 g_free(path_energy_full);
 151         if (path_current_now)
 152                 g_free(path_current_now);
 153         if (path_status)
 154                 g_free(path_status);
 155         if (battery_low_cmd)
 156                 g_free(battery_low_cmd);
 157
 158         battery_low_cmd = path_energy_now = path_energy_full = path_current_now = path_status = 0;
 159         bat1_font_desc = bat2_font_desc = 0;
 160 }
 161
 162
 163 void init_battery_panel(void *p)
 164 {
 165         Panel *panel = (Panel*)p;
 166         Battery *battery = &panel->battery;
 167         int bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
 168
 169         if (!battery_enabled)
 170                 return;
 171
 172         battery->area.parent = p;
 173         battery->area.panel = p;
 174         battery->area._draw_foreground = draw_battery;
 175         battery->area._resize = resize_battery;
 176         battery->area.resize = 1;
 177         battery->area.redraw = 1;
 178         battery->area.on_screen = 1;
 179
 180         update_battery(&battery_state);
 181         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 182         snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 183
 184         get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
 185         get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
 186
 187         if (panel_horizontal) {
 188                 // panel horizonal => fixed height and posy
 189                 battery->area.posy = panel->area.pix.border.width + panel->area.paddingy;
 190                 battery->area.height = panel->area.height - (2 * battery->area.posy);
 191         }
 192         else {
 193                 // panel vertical => fixed width, height, posy and posx
 194                 battery->area.posy = panel->clock.area.posy + panel->clock.area.height + panel->area.paddingx;
 195                 battery->area.height = (2 * battery->area.paddingxlr) + (bat_time_height + bat_percentage_height);
 196                 battery->area.posx = panel->area.pix.border.width + panel->area.paddingy;
 197                 battery->area.width = panel->area.width - (2 * panel->area.pix.border.width) - (2 * panel->area.paddingy);
 198         }
 199
 200         battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
 201         battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
 202         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;
 203 }
 204
 205
 206 void update_battery() {
 207         FILE *fp;
 208         char tmp[25];
 209         int64_t energy_now = 0, energy_full = 0, current_now = 0;
 210         int seconds = 0;
 211         int8_t new_percentage = 0;
 212
 213         fp = fopen(path_status, "r");
 214         if(fp != NULL) {
 215                 fgets(tmp, sizeof tmp, fp);
 216                 fclose(fp);
 217         }
 218         battery_state.state = BATTERY_UNKNOWN;
 219         if(strcasecmp(tmp, "Charging\n")==0) battery_state.state = BATTERY_CHARGING;
 220         if(strcasecmp(tmp, "Discharging\n")==0) battery_state.state = BATTERY_DISCHARGING;
 221         if(strcasecmp(tmp, "Full\n")==0) battery_state.state = BATTERY_FULL;
 222         if (battery_state.state == BATTERY_DISCHARGING) {
 223         }
 224         else {
 225         }
 226
 227         fp = fopen(path_energy_now, "r");
 228         if(fp != NULL) {
 229                 fgets(tmp, sizeof tmp, fp);
 230                 energy_now = atoi(tmp);
 231                 fclose(fp);
 232         }
 233
 234         fp = fopen(path_energy_full, "r");
 235         if(fp != NULL) {
 236                 fgets(tmp, sizeof tmp, fp);
 237                 energy_full = atoi(tmp);
 238                 fclose(fp);
 239         }
 240
 241         fp = fopen(path_current_now, "r");
 242         if(fp != NULL) {
 243                 fgets(tmp, sizeof tmp, fp);
 244                 current_now = atoi(tmp);
 245                 fclose(fp);
 246         }
 247
 248         if(current_now > 0) {
 249                 switch(battery_state.state) {
 250                         case BATTERY_CHARGING:
 251                                 seconds = 3600 * (energy_full - energy_now) / current_now;
 252                                 break;
 253                         case BATTERY_DISCHARGING:
 254                                 seconds = 3600 * energy_now / current_now;
 255                                 break;
 256                         default:
 257                                 seconds = 0;
 258                                 break;
 259                 }
 260         } else seconds = 0;
 261
 262         battery_state.time.hours = seconds / 3600;
 263         seconds -= 3600 * battery_state.time.hours;
 264         battery_state.time.minutes = seconds / 60;
 265         seconds -= 60 * battery_state.time.minutes;
 266         battery_state.time.seconds = seconds;
 267
 268         if(energy_full > 0)
 269                 new_percentage = (energy_now*100)/energy_full;
 270
 271   if(battery_low_status > new_percentage && battery_state.state == BATTERY_DISCHARGING && !battery_low_cmd_send) {
 272     printf("battery low, executing: %s\n", battery_low_cmd);
 273     if (battery_low_cmd)
 274       system(battery_low_cmd);
 275     battery_low_cmd_send = 1;
 276         }
 277   if(battery_low_status < new_percentage && battery_state.state == BATTERY_CHARGING && battery_low_cmd_send) {
 278     battery_low_cmd_send = 0;
 279   }
 280
 281         battery_state.percentage = new_percentage;
 282
 283         // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
 284         if(battery_state.percentage > 100) {
 285                 battery_state.percentage = 100;
 286         }
 287 }
 288
 289
 290 void draw_battery (void *obj, cairo_t *c, int active)
 291 {
 292         Battery *battery = obj;
 293         PangoLayout *layout;
 294
 295         layout = pango_cairo_create_layout (c);
 296
 297         // draw layout
 298         pango_layout_set_font_description(layout, bat1_font_desc);
 299         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 300         pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 301         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 302
 303         cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
 304
 305         pango_cairo_update_layout(c, layout);
 306         cairo_move_to(c, 0, battery->bat1_posy);
 307         pango_cairo_show_layout(c, layout);
 308
 309         pango_layout_set_font_description(layout, bat2_font_desc);
 310         pango_layout_set_indent(layout, 0);
 311         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 312         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 313
 314         pango_cairo_update_layout(c, layout);
 315         cairo_move_to(c, 0, battery->bat2_posy);
 316         pango_cairo_show_layout(c, layout);
 317
 318         g_object_unref(layout);
 319 }
 320
 321
 322 void resize_battery(void *obj)
 323 {
 324         Battery *battery = obj;
 325         PangoLayout *layout;
 326         int percentage_width, time_width, new_width;
 327
 328         percentage_width = time_width = 0;
 329         battery->area.redraw = 1;
 330
 331         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 332         if(battery_state.state == BATTERY_FULL) {
 333                 strcpy(buf_bat_time, "Full");
 334         } else {
 335                 snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 336         }
 337         // vertical panel doen't adjust width
 338         if (!panel_horizontal) return;
 339
 340         cairo_surface_t *cs;
 341         cairo_t *c;
 342         Pixmap pmap;
 343         pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
 344
 345         cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
 346         c = cairo_create(cs);
 347         layout = pango_cairo_create_layout(c);
 348
 349         // check width
 350         pango_layout_set_font_description(layout, bat1_font_desc);
 351         pango_layout_set_indent(layout, 0);
 352         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 353         pango_layout_get_pixel_size(layout, &percentage_width, NULL);
 354
 355         pango_layout_set_font_description(layout, bat2_font_desc);
 356         pango_layout_set_indent(layout, 0);
 357         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 358         pango_layout_get_pixel_size(layout, &time_width, NULL);
 359
 360         if(percentage_width > time_width) new_width = percentage_width;
 361         else new_width = time_width;
 362
 363         new_width += (2*battery->area.paddingxlr) + (2*battery->area.pix.border.width);
 364
 365         int old_width = battery->area.width;
 366
 367         Panel *panel = ((Area*)obj)->panel;
 368         battery->area.width = new_width + 1;
 369         battery->area.posx = panel->area.width - battery->area.width - panel->area.paddingxlr - panel->area.pix.border.width;
 370         if (panel->clock.area.on_screen)
 371                 battery->area.posx -= (panel->clock.area.width + panel->area.paddingx);
 372
 373         if(new_width > old_width || new_width < (old_width-6)) {
 374                 // refresh and resize other objects on panel
 375                 // we try to limit the number of refresh
 376                 // printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
 377                 panel->area.resize = 1;
 378                 systray.area.resize = 1;
 379                 panel_refresh = 1;
 380         }
 381
 382         g_object_unref (layout);
 383         cairo_destroy (c);
 384         cairo_surface_destroy (cs);
 385         XFreePixmap (server.dsp, pmap);
 386 }
 387