1 /**************************************************************************
5 * Copyright (C) 2009 Sebastian Reichel <elektranox@gmail.com>
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.
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 **************************************************************************/
24 #include <cairo-xlib.h>
25 #include <pango/pangocairo.h>
35 PangoFontDescription
*bat1_font_desc
=0;
36 PangoFontDescription
*bat2_font_desc
=0;
37 struct batstate battery_state
;
40 static char buf_bat_percentage
[10];
41 static char buf_bat_time
[20];
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;
56 const char *entryname
;
57 char *battery_dir
= 0;
59 if (!battery_enabled
) return;
61 directory
= g_dir_open("/sys/class/power_supply", 0, &error
);
65 while ((entryname
=g_dir_read_name(directory
))) {
66 if (strncmp(entryname
,"AC", 2) == 0) continue;
68 char *path1
= g_build_filename("/sys/class/power_supply", entryname
, "present", NULL
);
69 if (g_file_test (path1
, G_FILE_TEST_EXISTS
)) {
71 battery_dir
= g_build_filename("/sys/class/power_supply", entryname
, NULL
);
78 g_dir_close(directory
);
81 fprintf(stderr
, "ERROR: battery applet can't found power_supply\n");
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
);
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
);
97 fprintf(stderr
, "ERROR: can't found energy_* or charge_*\n");
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
);
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
) {
113 fprintf(stderr
, "ERROR: battery applet can't open energy_now\n");
126 void cleanup_battery()
130 pango_font_description_free(bat1_font_desc
);
132 pango_font_description_free(bat2_font_desc
);
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
);
142 g_free(battery_low_cmd
);
144 battery_low_cmd
= path_energy_now
= path_energy_full
= path_current_now
= path_status
= 0;
145 bat1_font_desc
= bat2_font_desc
= 0;
149 void init_battery_panel(void *p
)
151 Panel
*panel
= (Panel
*)p
;
152 Battery
*battery
= &panel
->battery
;
154 int bat_percentage_height
, bat_percentage_height_ink
, bat_time_height
, bat_time_height_ink
;
156 if (!battery_enabled
)
159 battery
->area
.parent
= p
;
160 battery
->area
.panel
= p
;
161 battery
->area
._draw_foreground
= draw_battery
;
162 battery
->area
._resize
= resize_battery
;
163 battery
->area
.resize
= 1;
164 battery
->area
.redraw
= 1;
165 battery
->area
.on_screen
= 1;
167 update_battery(&battery_state
);
168 snprintf(buf_bat_percentage
, sizeof(buf_bat_percentage
), "%d%%", battery_state
.percentage
);
169 snprintf(buf_bat_time
, sizeof(buf_bat_time
), "%02d:%02d", battery_state
.time
.hours
, battery_state
.time
.minutes
);
171 get_text_size(bat1_font_desc
, &bat_percentage_height_ink
, &bat_percentage_height
, panel
->area
.height
, buf_bat_percentage
, strlen(buf_bat_percentage
));
172 get_text_size(bat2_font_desc
, &bat_time_height_ink
, &bat_time_height
, panel
->area
.height
, buf_bat_time
, strlen(buf_bat_time
));
174 if (panel_horizontal
) {
175 // panel horizonal => fixed height and posy
176 battery
->area
.posy
= panel
->area
.pix
.border
.width
+ panel
->area
.paddingy
;
177 battery
->area
.height
= panel
->area
.height
- (2 * battery
->area
.posy
);
180 // panel vertical => fixed width, height, posy and posx
181 battery
->area
.posy
= panel
->clock
.area
.posy
+ panel
->clock
.area
.height
+ panel
->area
.paddingx
;
182 battery
->area
.height
= (2 * battery
->area
.paddingxlr
) + (bat_time_height
+ bat_percentage_height
);
183 battery
->area
.posx
= panel
->area
.pix
.border
.width
+ panel
->area
.paddingy
;
184 battery
->area
.width
= panel
->area
.width
- (2 * panel
->area
.pix
.border
.width
) - (2 * panel
->area
.paddingy
);
187 battery
->bat1_posy
= (battery
->area
.height
- bat_percentage_height
) / 2;
188 battery
->bat1_posy
-= ((bat_time_height_ink
+ 2) / 2);
189 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;
193 void update_battery() {
196 int64_t energy_now
= 0, energy_full
= 0, current_now
= 0;
198 int8_t new_percentage
= 0;
200 fp
= fopen(path_status
, "r");
202 fgets(tmp
, sizeof tmp
, fp
);
205 battery_state
.state
= BATTERY_UNKNOWN
;
206 if(strcasecmp(tmp
, "Charging\n")==0) battery_state
.state
= BATTERY_CHARGING
;
207 if(strcasecmp(tmp
, "Discharging\n")==0) battery_state
.state
= BATTERY_DISCHARGING
;
208 if(strcasecmp(tmp
, "Full\n")==0) battery_state
.state
= BATTERY_FULL
;
209 if (battery_state
.state
== BATTERY_DISCHARGING
) {
214 fp
= fopen(path_energy_now
, "r");
216 fgets(tmp
, sizeof tmp
, fp
);
217 energy_now
= atoi(tmp
);
221 fp
= fopen(path_energy_full
, "r");
223 fgets(tmp
, sizeof tmp
, fp
);
224 energy_full
= atoi(tmp
);
228 fp
= fopen(path_current_now
, "r");
230 fgets(tmp
, sizeof tmp
, fp
);
231 current_now
= atoi(tmp
);
235 if(current_now
> 0) {
236 switch(battery_state
.state
) {
237 case BATTERY_CHARGING
:
238 seconds
= 3600 * (energy_full
- energy_now
) / current_now
;
240 case BATTERY_DISCHARGING
:
241 seconds
= 3600 * energy_now
/ current_now
;
249 battery_state
.time
.hours
= seconds
/ 3600;
250 seconds
-= 3600 * battery_state
.time
.hours
;
251 battery_state
.time
.minutes
= seconds
/ 60;
252 seconds
-= 60 * battery_state
.time
.minutes
;
253 battery_state
.time
.seconds
= seconds
;
256 new_percentage
= (energy_now
*100)/energy_full
;
258 if(battery_low_status
!= 0 && battery_low_status
== new_percentage
&& battery_state
.percentage
> new_percentage
) {
259 //printf("battery low, executing: %s\n", battery_low_cmd);
260 if (battery_low_cmd
) system(battery_low_cmd
);
263 battery_state
.percentage
= new_percentage
;
265 // clamp percentage to 100 in case battery is misreporting that its current charge is more than its max
266 if(battery_state
.percentage
> 100) {
267 battery_state
.percentage
= 100;
272 void draw_battery (void *obj
, cairo_t
*c
, int active
)
274 Battery
*battery
= obj
;
277 layout
= pango_cairo_create_layout (c
);
280 pango_layout_set_font_description(layout
, bat1_font_desc
);
281 pango_layout_set_width(layout
, battery
->area
.width
* PANGO_SCALE
);
282 pango_layout_set_alignment(layout
, PANGO_ALIGN_CENTER
);
283 pango_layout_set_text(layout
, buf_bat_percentage
, strlen(buf_bat_percentage
));
285 cairo_set_source_rgba(c
, battery
->font
.color
[0], battery
->font
.color
[1], battery
->font
.color
[2], battery
->font
.alpha
);
287 pango_cairo_update_layout(c
, layout
);
288 cairo_move_to(c
, 0, battery
->bat1_posy
);
289 pango_cairo_show_layout(c
, layout
);
291 pango_layout_set_font_description(layout
, bat2_font_desc
);
292 pango_layout_set_indent(layout
, 0);
293 pango_layout_set_text(layout
, buf_bat_time
, strlen(buf_bat_time
));
294 pango_layout_set_width(layout
, battery
->area
.width
* PANGO_SCALE
);
296 pango_cairo_update_layout(c
, layout
);
297 cairo_move_to(c
, 0, battery
->bat2_posy
);
298 pango_cairo_show_layout(c
, layout
);
300 g_object_unref(layout
);
304 void resize_battery(void *obj
)
306 Battery
*battery
= obj
;
308 int percentage_width
, time_width
, new_width
;
310 percentage_width
= time_width
= 0;
311 battery
->area
.redraw
= 1;
313 snprintf(buf_bat_percentage
, sizeof(buf_bat_percentage
), "%d%%", battery_state
.percentage
);
314 if(battery_state
.state
== BATTERY_FULL
) {
315 strcpy(buf_bat_time
, "Full");
317 snprintf(buf_bat_time
, sizeof(buf_bat_time
), "%02d:%02d", battery_state
.time
.hours
, battery_state
.time
.minutes
);
319 // vertical panel doen't adjust width
320 if (!panel_horizontal
) return;
325 pmap
= XCreatePixmap(server
.dsp
, server
.root_win
, battery
->area
.width
, battery
->area
.height
, server
.depth
);
327 cs
= cairo_xlib_surface_create(server
.dsp
, pmap
, server
.visual
, battery
->area
.width
, battery
->area
.height
);
328 c
= cairo_create(cs
);
329 layout
= pango_cairo_create_layout(c
);
332 pango_layout_set_font_description(layout
, bat1_font_desc
);
333 pango_layout_set_indent(layout
, 0);
334 pango_layout_set_text(layout
, buf_bat_percentage
, strlen(buf_bat_percentage
));
335 pango_layout_get_pixel_size(layout
, &percentage_width
, NULL
);
337 pango_layout_set_font_description(layout
, bat2_font_desc
);
338 pango_layout_set_indent(layout
, 0);
339 pango_layout_set_text(layout
, buf_bat_time
, strlen(buf_bat_time
));
340 pango_layout_get_pixel_size(layout
, &time_width
, NULL
);
342 if(percentage_width
> time_width
) new_width
= percentage_width
;
343 else new_width
= time_width
;
345 new_width
+= (2*battery
->area
.paddingxlr
) + (2*battery
->area
.pix
.border
.width
);
347 int old_width
= battery
->area
.width
;
349 Panel
*panel
= ((Area
*)obj
)->panel
;
350 battery
->area
.width
= new_width
+ 1;
351 battery
->area
.posx
= panel
->area
.width
- battery
->area
.width
- panel
->area
.paddingxlr
- panel
->area
.pix
.border
.width
;
352 if (panel
->clock
.area
.on_screen
)
353 battery
->area
.posx
-= (panel
->clock
.area
.width
+ panel
->area
.paddingx
);
355 if(new_width
> old_width
|| new_width
< (old_width
-6)) {
356 // refresh and resize other objects on panel
357 // we try to limit the number of refresh
358 // printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
359 panel
->area
.resize
= 1;
360 systray
.area
.resize
= 1;
364 g_object_unref (layout
);
366 cairo_surface_destroy (cs
);
367 XFreePixmap (server
.dsp
, pmap
);