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
  41 static char buf_bat_percentage[10];
  42 static char buf_bat_time[20];
  43
  44 int8_t battery_low_status;
  45 char *battery_low_cmd=0;
  46 char *path_energy_now=0;
  47 char *path_energy_full=0;
  48 char *path_current_now=0;
  49 char *path_status=0;
  50
  51 void update_batterys()
  52 {
  53         int i;
  54         update_battery();
  55         for (i=0 ; i < nb_panel ; i++)
  56                 panel1[i].battery.area.resize = 1;
  57 }
  58
  59
  60 void init_battery()
  61 {
  62         // check battery
  63         GDir *directory = 0;
  64         GError *error = NULL;
  65         const char *entryname;
  66         char *battery_dir = 0;
  67
  68         if (!battery_enabled) return;
  69
  70         directory = g_dir_open("/sys/class/power_supply", 0, &error);
  71         if (error)
  72                 g_error_free(error);
  73         else {
  74                 while ((entryname=g_dir_read_name(directory))) {
  75                         if (strncmp(entryname,"AC", 2) == 0) continue;
  76
  77                         char *path1 = g_build_filename("/sys/class/power_supply", entryname, "present", NULL);
  78                         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
  79                                 g_free(path1);
  80                                 battery_dir = g_build_filename("/sys/class/power_supply", entryname, NULL);
  81                                 break;
  82                         }
  83                         g_free(path1);
  84                 }
  85         }
  86         if (directory)
  87                 g_dir_close(directory);
  88         if (!battery_dir) {
  89                 cleanup_battery();
  90                 fprintf(stderr, "ERROR: battery applet can't found power_supply\n");
  91                 return;
  92         }
  93
  94         char *path1 = g_build_filename(battery_dir, "energy_now", NULL);
  95         if (g_file_test (path1, G_FILE_TEST_EXISTS)) {
  96                 path_energy_now = g_build_filename(battery_dir, "energy_now", NULL);
  97                 path_energy_full = g_build_filename(battery_dir, "energy_full", NULL);
  98         }
  99         else {
 100                 char *path2 = g_build_filename(battery_dir, "charge_now", NULL);
 101                 if (g_file_test (path2, G_FILE_TEST_EXISTS)) {
 102                         path_energy_now = g_build_filename(battery_dir, "charge_now", NULL);
 103                         path_energy_full = g_build_filename(battery_dir, "charge_full", NULL);
 104                 }
 105                 else {
 106                         fprintf(stderr, "ERROR: can't found energy_* or charge_*\n");
 107                 }
 108                 g_free(path2);
 109         }
 110         if (path_energy_now && path_energy_full) {
 111                 path_current_now = g_build_filename(battery_dir, "current_now", NULL);
 112                 path_status = g_build_filename(battery_dir, "status", NULL);
 113
 114                 // check file
 115                 FILE *fp1, *fp2, *fp3, *fp4;
 116                 fp1 = fopen(path_energy_now, "r");
 117                 fp2 = fopen(path_energy_full, "r");
 118                 fp3 = fopen(path_current_now, "r");
 119                 fp4 = fopen(path_status, "r");
 120                 if (fp1 == NULL || fp2 == NULL || fp3 == NULL || fp4 == NULL) {
 121                         cleanup_battery();
 122                         fprintf(stderr, "ERROR: battery applet can't open energy_now\n");
 123                 }
 124                 fclose(fp1);
 125                 fclose(fp2);
 126                 fclose(fp3);
 127                 fclose(fp4);
 128         }
 129
 130         g_free(path1);
 131         g_free(battery_dir);
 132
 133         if (battery_enabled)
 134                 install_timer(0, 1000000, 3, 0, update_batterys);
 135 }
 136
 137
 138 void cleanup_battery()
 139 {
 140         battery_enabled = 0;
 141         if (bat1_font_desc)
 142                 pango_font_description_free(bat1_font_desc);
 143         if (bat2_font_desc)
 144                 pango_font_description_free(bat2_font_desc);
 145         if (path_energy_now)
 146                 g_free(path_energy_now);
 147         if (path_energy_full)
 148                 g_free(path_energy_full);
 149         if (path_current_now)
 150                 g_free(path_current_now);
 151         if (path_status)
 152                 g_free(path_status);
 153         if (battery_low_cmd)
 154                 g_free(battery_low_cmd);
 155
 156         battery_low_cmd = path_energy_now = path_energy_full = path_current_now = path_status = 0;
 157         bat1_font_desc = bat2_font_desc = 0;
 158 }
 159
 160
 161 void init_battery_panel(void *p)
 162 {
 163         Panel *panel = (Panel*)p;
 164         Battery *battery = &panel->battery;
 165         int bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
 166
 167         if (!battery_enabled)
 168                 return;
 169
 170         battery->area.parent = p;
 171         battery->area.panel = p;
 172         battery->area._draw_foreground = draw_battery;
 173         battery->area._resize = resize_battery;
 174         battery->area.resize = 1;
 175         battery->area.redraw = 1;
 176         battery->area.on_screen = 1;
 177
 178         update_battery(&battery_state);
 179         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 180         snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 181
 182         get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
 183         get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
 184
 185         if (panel_horizontal) {
 186                 // panel horizonal => fixed height and posy
 187                 battery->area.posy = panel->area.pix.border.width + panel->area.paddingy;
 188                 battery->area.height = panel->area.height - (2 * battery->area.posy);
 189         }
 190         else {
 191                 // panel vertical => fixed width, height, posy and posx
 192                 battery->area.posy = panel->clock.area.posy + panel->clock.area.height + panel->area.paddingx;
 193                 battery->area.height = (2 * battery->area.paddingxlr) + (bat_time_height + bat_percentage_height);
 194                 battery->area.posx = panel->area.pix.border.width + panel->area.paddingy;
 195                 battery->area.width = panel->area.width - (2 * panel->area.pix.border.width) - (2 * panel->area.paddingy);
 196         }
 197
 198         battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
 199         battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
 200         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;
 201 }
 202
 203
 204 void update_battery() {
 205         FILE *fp;
 206         char tmp[25];
 207         int64_t energy_now = 0, energy_full = 0, current_now = 0;
 208         int seconds = 0;
 209         int8_t new_percentage = 0;
 210
 211         fp = fopen(path_status, "r");
 212         if(fp != NULL) {
 213                 fgets(tmp, sizeof tmp, fp);
 214                 fclose(fp);
 215         }
 216         battery_state.state = BATTERY_UNKNOWN;
 217         if(strcasecmp(tmp, "Charging\n")==0) battery_state.state = BATTERY_CHARGING;
 218         if(strcasecmp(tmp, "Discharging\n")==0) battery_state.state = BATTERY_DISCHARGING;
 219         if(strcasecmp(tmp, "Full\n")==0) battery_state.state = BATTERY_FULL;
 220         if (battery_state.state == BATTERY_DISCHARGING) {
 221         }
 222         else {
 223         }
 224
 225         fp = fopen(path_energy_now, "r");
 226         if(fp != NULL) {
 227                 fgets(tmp, sizeof tmp, fp);
 228                 energy_now = atoi(tmp);
 229                 fclose(fp);
 230         }
 231
 232         fp = fopen(path_energy_full, "r");
 233         if(fp != NULL) {
 234                 fgets(tmp, sizeof tmp, fp);
 235                 energy_full = atoi(tmp);
 236                 fclose(fp);
 237         }
 238
 239         fp = fopen(path_current_now, "r");
 240         if(fp != NULL) {
 241                 fgets(tmp, sizeof tmp, fp);
 242                 current_now = atoi(tmp);
 243                 fclose(fp);
 244         }
 245
 246         if(current_now > 0) {
 247                 switch(battery_state.state) {
 248                         case BATTERY_CHARGING:
 249                                 seconds = 3600 * (energy_full - energy_now) / current_now;
 250                                 break;
 251                         case BATTERY_DISCHARGING:
 252                                 seconds = 3600 * energy_now / current_now;
 253                                 break;
 254                         default:
 255                                 seconds = 0;
 256                                 break;
 257                 }
 258         } else seconds = 0;
 259
 260         battery_state.time.hours = seconds / 3600;
 261         seconds -= 3600 * battery_state.time.hours;
 262         battery_state.time.minutes = seconds / 60;
 263         seconds -= 60 * battery_state.time.minutes;
 264         battery_state.time.seconds = seconds;
 265
 266         if(energy_full > 0)
 267                 new_percentage = (energy_now*100)/energy_full;
 268
 269         if(battery_low_status != 0 && battery_low_status == new_percentage && battery_state.percentage > new_percentage) {
 270                 //printf("battery low, executing: %s\n", battery_low_cmd);
 271                 if (battery_low_cmd) system(battery_low_cmd);
 272         }
 273
 274         battery_state.percentage = new_percentage;
 275
 276         // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
 277         if(battery_state.percentage > 100) {
 278                 battery_state.percentage = 100;
 279         }
 280 }
 281
 282
 283 void draw_battery (void *obj, cairo_t *c, int active)
 284 {
 285         Battery *battery = obj;
 286         PangoLayout *layout;
 287
 288         layout = pango_cairo_create_layout (c);
 289
 290         // draw layout
 291         pango_layout_set_font_description(layout, bat1_font_desc);
 292         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 293         pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 294         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 295
 296         cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
 297
 298         pango_cairo_update_layout(c, layout);
 299         cairo_move_to(c, 0, battery->bat1_posy);
 300         pango_cairo_show_layout(c, layout);
 301
 302         pango_layout_set_font_description(layout, bat2_font_desc);
 303         pango_layout_set_indent(layout, 0);
 304         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 305         pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
 306
 307         pango_cairo_update_layout(c, layout);
 308         cairo_move_to(c, 0, battery->bat2_posy);
 309         pango_cairo_show_layout(c, layout);
 310
 311         g_object_unref(layout);
 312 }
 313
 314
 315 void resize_battery(void *obj)
 316 {
 317         Battery *battery = obj;
 318         PangoLayout *layout;
 319         int percentage_width, time_width, new_width;
 320
 321         percentage_width = time_width = 0;
 322         battery->area.redraw = 1;
 323
 324         snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 325         if(battery_state.state == BATTERY_FULL) {
 326                 strcpy(buf_bat_time, "Full");
 327         } else {
 328                 snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
 329         }
 330         // vertical panel doen't adjust width
 331         if (!panel_horizontal) return;
 332
 333         cairo_surface_t *cs;
 334         cairo_t *c;
 335         Pixmap pmap;
 336         pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
 337
 338         cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
 339         c = cairo_create(cs);
 340         layout = pango_cairo_create_layout(c);
 341
 342         // check width
 343         pango_layout_set_font_description(layout, bat1_font_desc);
 344         pango_layout_set_indent(layout, 0);
 345         pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
 346         pango_layout_get_pixel_size(layout, &percentage_width, NULL);
 347
 348         pango_layout_set_font_description(layout, bat2_font_desc);
 349         pango_layout_set_indent(layout, 0);
 350         pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
 351         pango_layout_get_pixel_size(layout, &time_width, NULL);
 352
 353         if(percentage_width > time_width) new_width = percentage_width;
 354         else new_width = time_width;
 355
 356         new_width += (2*battery->area.paddingxlr) + (2*battery->area.pix.border.width);
 357
 358         int old_width = battery->area.width;
 359
 360         Panel *panel = ((Area*)obj)->panel;
 361         battery->area.width = new_width + 1;
 362         battery->area.posx = panel->area.width - battery->area.width - panel->area.paddingxlr - panel->area.pix.border.width;
 363         if (panel->clock.area.on_screen)
 364                 battery->area.posx -= (panel->clock.area.width + panel->area.paddingx);
 365
 366         if(new_width > old_width || new_width < (old_width-6)) {
 367                 // refresh and resize other objects on panel
 368                 // we try to limit the number of refresh
 369                 // printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
 370                 panel->area.resize = 1;
 371                 systray.area.resize = 1;
 372                 panel_refresh = 1;
 373         }
 374
 375         g_object_unref (layout);
 376         cairo_destroy (c);
 377         cairo_surface_destroy (cs);
 378         XFreePixmap (server.dsp, pmap);
 379 }
 380