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 = 101;
  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 char *battery_low_cmd=0;
  48 unsigned char battery_low_cmd_send=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         if (bat1_font_desc)
 163                 pango_font_description_free(bat1_font_desc);
 164         if (bat2_font_desc)
 165                 pango_font_description_free(bat2_font_desc);
 166         if (path_energy_now)
 167                 g_free(path_energy_now);
 168         if (path_energy_full)
 169                 g_free(path_energy_full);
 170         if (path_current_now)
 171                 g_free(path_current_now);
 172         if (path_status)
 173                 g_free(path_status);
 174         if (battery_low_cmd)
 175                 g_free(battery_low_cmd);
 176
 177         battery_low_cmd = path_energy_now = path_energy_full = path_current_now = path_status = 0;
 178         bat1_font_desc = bat2_font_desc = 0;
 179 }
 180
 181
 182 void init_battery_panel(void *p)
 183 {
 184         Panel *panel = (Panel*)p;
 185         Battery *battery = &panel->battery;
 186         int bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
 187
 188         if (!battery_enabled)
 189                 return;
 190
 191         battery->area.parent = p;
 192         battery->area.panel = p;
 193         battery->area._draw_foreground = draw_battery;
 194         battery->area._resize = resize_battery;
 195         battery->area.resize = 1;
 196         battery->area.redraw = 1;
 197         battery->area.on_screen = 1;
 198
 199         update_battery(&battery_state);
 200         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 201         snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 202
 203         get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
 204         get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
 205
 206         if (panel_horizontal) {
 207                 // panel horizonal => fixed height and posy
 208                 battery->area.posy = panel->area.bg->border.width + panel->area.paddingy;
 209                 battery->area.height = panel->area.height - (2 * battery->area.posy);
 210         }
 211         else {
 212                 // panel vertical => fixed width, height, posy and posx
 213                 battery->area.posy = panel->clock.area.posy + panel->clock.area.height + panel->area.paddingx;
 214                 battery->area.height = (2 * battery->area.paddingxlr) + (bat_time_height + bat_percentage_height);
 215                 battery->area.posx = panel->area.bg->border.width + panel->area.paddingy;
 216                 battery->area.width = panel->area.width - (2 * panel->area.bg->border.width) - (2 * panel->area.paddingy);
 217         }
 218
 219         battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
 220         battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
 221         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;
 222 }
 223
 224
 225 void update_battery() {
 226         FILE *fp;
 227         char tmp[25];
 228         int64_t energy_now = 0, energy_full = 0, current_now = 0;
 229         int seconds = 0;
 230         int8_t new_percentage = 0;
 231
 232         fp = fopen(path_status, "r");
 233         if(fp != NULL) {
 234                 if (fgets(tmp, sizeof tmp, fp)) {
 235                         battery_state.state = BATTERY_UNKNOWN;
 236                         if(strcasecmp(tmp, "Charging\n")==0) battery_state.state = BATTERY_CHARGING;
 237                         if(strcasecmp(tmp, "Discharging\n")==0) battery_state.state = BATTERY_DISCHARGING;
 238                         if(strcasecmp(tmp, "Full\n")==0) battery_state.state = BATTERY_FULL;
 239                 }
 240                 fclose(fp);
 241         }
 242
 243         fp = fopen(path_energy_now, "r");
 244         if(fp != NULL) {
 245                 if (fgets(tmp, sizeof tmp, fp)) energy_now = atoi(tmp);
 246                 fclose(fp);
 247         }
 248
 249         fp = fopen(path_energy_full, "r");
 250         if(fp != NULL) {
 251                 if (fgets(tmp, sizeof tmp, fp)) energy_full = atoi(tmp);
 252                 fclose(fp);
 253         }
 254
 255         fp = fopen(path_current_now, "r");
 256         if(fp != NULL) {
 257                 if (fgets(tmp, sizeof tmp, fp)) current_now = atoi(tmp);
 258                 fclose(fp);
 259         }
 260
 261         if(current_now > 0) {
 262                 switch(battery_state.state) {
 263                         case BATTERY_CHARGING:
 264                                 seconds = 3600 * (energy_full - energy_now) / current_now;
 265                                 break;
 266                         case BATTERY_DISCHARGING:
 267                                 seconds = 3600 * energy_now / current_now;
 268                                 break;
 269                         default:
 270                                 seconds = 0;
 271                                 break;
 272                 }
 273         } else seconds = 0;
 274
 275         battery_state.time.hours = seconds / 3600;
 276         seconds -= 3600 * battery_state.time.hours;
 277         battery_state.time.minutes = seconds / 60;
 278         seconds -= 60 * battery_state.time.minutes;
 279         battery_state.time.seconds = seconds;
 280
 281         if(energy_full > 0)
 282                 new_percentage = (energy_now*100)/energy_full;
 283
 284         if(battery_low_status > new_percentage && battery_state.state == BATTERY_DISCHARGING && !battery_low_cmd_send) {
 285                 if (battery_low_cmd)
 286                         if (-1 != system(battery_low_cmd))
 287                                 battery_low_cmd_send = 1;
 288         }
 289         if(battery_low_status < new_percentage && battery_state.state == BATTERY_CHARGING && battery_low_cmd_send) {
 290                 battery_low_cmd_send = 0;
 291         }
 292
 293         battery_state.percentage = new_percentage;
 294
 295         // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
 296         if(battery_state.percentage > 100) {
 297                 battery_state.percentage = 100;
 298         }
 299 }
 300
 301
 302 void draw_battery (void *obj, cairo_t *c)
 303 {
 304         Battery *battery = obj;
 305         PangoLayout *layout;
 306
 307         layout = pango_cairo_create_layout (c);
 308
 309         // draw layout
 310         pango_layout_set_font_description(layout, bat1_font_desc);
 311         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 312         pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 313         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 314
 315         cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
 316
 317         pango_cairo_update_layout(c, layout);
 318         cairo_move_to(c, 0, battery->bat1_posy);
 319         pango_cairo_show_layout(c, layout);
 320
 321         pango_layout_set_font_description(layout, bat2_font_desc);
 322         pango_layout_set_indent(layout, 0);
 323         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 324         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 325
 326         pango_cairo_update_layout(c, layout);
 327         cairo_move_to(c, 0, battery->bat2_posy);
 328         pango_cairo_show_layout(c, layout);
 329
 330         g_object_unref(layout);
 331 }
 332
 333
 334 void resize_battery(void *obj)
 335 {
 336         Battery *battery = obj;
 337         PangoLayout *layout;
 338         int percentage_width, time_width, new_width;
 339
 340         percentage_width = time_width = 0;
 341         battery->area.redraw = 1;
 342
 343         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 344         if(battery_state.state == BATTERY_FULL) {
 345                 strcpy(buf_bat_time, "Full");
 346         } else {
 347                 snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 348         }
 349         // vertical panel doen't adjust width
 350         if (!panel_horizontal) return;
 351
 352         cairo_surface_t *cs;
 353         cairo_t *c;
 354         Pixmap pmap;
 355         pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
 356
 357         cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
 358         c = cairo_create(cs);
 359         layout = pango_cairo_create_layout(c);
 360
 361         // check width
 362         pango_layout_set_font_description(layout, bat1_font_desc);
 363         pango_layout_set_indent(layout, 0);
 364         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 365         pango_layout_get_pixel_size(layout, &percentage_width, NULL);
 366
 367         pango_layout_set_font_description(layout, bat2_font_desc);
 368         pango_layout_set_indent(layout, 0);
 369         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 370         pango_layout_get_pixel_size(layout, &time_width, NULL);
 371
 372         if(percentage_width > time_width) new_width = percentage_width;
 373         else new_width = time_width;
 374
 375         new_width += (2*battery->area.paddingxlr) + (2*battery->area.bg->border.width);
 376
 377         int old_width = battery->area.width;
 378
 379         Panel *panel = ((Area*)obj)->panel;
 380         battery->area.width = new_width + 1;
 381         battery->area.posx = panel->area.width - battery->area.width - panel->area.paddingxlr - panel->area.bg->border.width;
 382         if (panel->clock.area.on_screen)
 383                 battery->area.posx -= (panel->clock.area.width + panel->area.paddingx);
 384
 385         if(new_width > old_width || new_width < (old_width-6)) {
 386                 // refresh and resize other objects on panel
 387                 // we try to limit the number of refresh
 388                 // printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
 389                 panel->area.resize = 1;
 390                 systray.area.resize = 1;
 391                 panel_refresh = 1;
 392         }
 393
 394         g_object_unref (layout);
 395         cairo_destroy (c);
 396         cairo_surface_destroy (cs);
 397         XFreePixmap (server.dsp, pmap);
 398 }
 399