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