added battery code

diff --git a/src/battery/battery.c b/src/battery/battery.c
new file mode 100644 (file)
index 0000000..a0b122d
--- /dev/null
+++ b/src/battery/battery.c
@@ -0,0 +1,244 @@
+/**************************************************************************
+*
+* Tint2 : battery
+*
+* Copyright (C) 2009 Sebastian Reichel <elektranox@gmail.com>
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License version 2
+* or any later version as published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**************************************************************************/
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <cairo.h>
+#include <cairo-xlib.h>
+#include <pango/pangocairo.h>
+
+#include "window.h"
+#include "server.h"
+#include "taskbar.h"
+#include "panel.h"
+#include "area.h"
+#include "battery.h"
+#include "clock.h"
+
+PangoFontDescription *bat1_font_desc;
+PangoFontDescription *bat2_font_desc;
+struct batstate battery_state;
+
+static char buf_bat_percentage[10];
+static char buf_bat_time[20];
+
+int8_t battery_low_status;
+char* battery_low_cmd;
+
+void update_battery(struct batstate *data) {
+       FILE *fp;
+       char tmp[25];
+       int64_t energy_now = 0, energy_full = 0, current_now = 0;
+       int seconds = 0;
+       int8_t new_percentage = 0;
+
+       fp = fopen("/sys/class/power_supply/BAT0/energy_now", "r");
+       if(fp != NULL) {
+               fgets(tmp, sizeof tmp, fp);
+               energy_now = atoi(tmp);
+               fclose(fp);
+       } else printf("ERROR: battery applet can't open energy_now\n");
+
+       fp = fopen("/sys/class/power_supply/BAT0/energy_full", "r");
+       if(fp != NULL) {
+               fgets(tmp, sizeof tmp, fp);
+               energy_full = atoi(tmp);
+               fclose(fp);
+       } else printf("ERROR: battery applet can't open energy_full\n");
+
+       fp = fopen("/sys/class/power_supply/BAT0/current_now", "r");
+       if(fp != NULL) {
+               fgets(tmp, sizeof tmp, fp);
+               current_now = atoi(tmp);
+               fclose(fp);
+       } else printf("ERROR: battery applet can't open current_now\n");
+
+       fp = fopen("/sys/class/power_supply/BAT0/status", "r");
+       if(fp != NULL) {
+               fgets(tmp, sizeof tmp, fp);
+               fclose(fp);
+       } else printf("ERROR: battery applet can't open status");
+
+       data->state = BATTERY_UNKNOWN;
+       if(strcasecmp(tmp, "Charging\n")==0) data->state = BATTERY_CHARGING;
+       if(strcasecmp(tmp, "Discharging\n")==0) data->state = BATTERY_DISCHARGING;
+
+       if(current_now > 0) {
+               switch(data->state) {
+                       case BATTERY_CHARGING:
+                               seconds = 3600 * (energy_full - energy_now) / current_now;
+                               break;
+                       case BATTERY_DISCHARGING:
+                               seconds = 3600 * energy_now / current_now;
+                               break;
+                       default:
+                               seconds = 0;
+                               break;
+               }
+       } else seconds = 0;
+
+       data->time.hours = seconds / 3600;
+       seconds -= 3600 * data->time.hours;
+       data->time.minutes = seconds / 60;
+       seconds -= 60 * data->time.minutes;
+       data->time.seconds = seconds;
+
+       new_percentage = (energy_now*100)/energy_full;
+
+       if(battery_low_status != 0 && battery_low_status == new_percentage && data->percentage > new_percentage) {
+               printf("battery low, executing: %s\n", battery_low_cmd);
+               if(battery_low_cmd) system(battery_low_cmd);
+       }
+
+       data->percentage = new_percentage;
+}
+
+void init_battery()
+{
+   Panel *panel;
+   Battery *battery;
+   int i, bat_percentage_height, bat_percentage_height_ink, bat_time_height, bat_time_height_ink;
+
+       for (i=0 ; i < nb_panel ; i++) {
+               panel = &panel1[i];
+               battery = &panel->battery;
+
+               battery->area.parent = panel;
+               battery->area.panel = panel;
+               battery->area._draw_foreground = draw_battery;
+               battery->area._resize = resize_battery;
+
+               if (!battery->area.on_screen) continue;
+
+               battery->area.posy = panel->area.pix.border.width + panel->area.paddingy;
+               battery->area.height = panel->area.height - (2 * battery->area.posy);
+               battery->area.resize = 1;
+               battery->area.redraw = 1;
+
+               update_battery(&battery_state);
+               snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
+               snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
+
+               get_text_size(bat1_font_desc, &bat_percentage_height_ink, &bat_percentage_height, panel->area.height, buf_bat_percentage, strlen(buf_bat_percentage));
+               battery->bat1_posy = (battery->area.height - bat_percentage_height) / 2;
+
+               get_text_size(bat2_font_desc, &bat_time_height_ink, &bat_time_height, panel->area.height, buf_bat_time, strlen(buf_bat_time));
+
+               battery->bat1_posy -= ((bat_time_height_ink + 2) / 2);
+               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;
+       }
+}
+
+
+void draw_battery (void *obj, cairo_t *c, int active)
+{
+       Battery *battery = obj;
+       PangoLayout *layout;
+
+       layout = pango_cairo_create_layout (c);
+
+       // draw layout
+       pango_layout_set_font_description(layout, bat1_font_desc);
+       pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
+       pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
+       pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
+
+       cairo_set_source_rgba(c, battery->font.color[0], battery->font.color[1], battery->font.color[2], battery->font.alpha);
+
+       pango_cairo_update_layout(c, layout);
+       cairo_move_to(c, 0, battery->bat1_posy);
+       pango_cairo_show_layout(c, layout);
+
+       pango_layout_set_font_description(layout, bat2_font_desc);
+       pango_layout_set_indent(layout, 0);
+       pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
+       pango_layout_set_width(layout, battery->area.width * PANGO_SCALE);
+
+       pango_cairo_update_layout(c, layout);
+       cairo_move_to(c, 0, battery->bat2_posy);
+       pango_cairo_show_layout(c, layout);
+
+       g_object_unref(layout);
+}
+
+void resize_battery(void *obj)
+{
+       Battery *battery = obj;
+       PangoLayout *layout;
+       int percentage_width, time_width, new_width;
+
+       percentage_width = time_width = 0;
+       battery->area.redraw = 1;
+
+       snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
+       snprintf(buf_bat_time, sizeof(buf_bat_time), "%02d:%02d", battery_state.time.hours, battery_state.time.minutes);
+
+       cairo_surface_t *cs;
+       cairo_t *c;
+       Pixmap pmap;
+       pmap = XCreatePixmap(server.dsp, server.root_win, battery->area.width, battery->area.height, server.depth);
+
+       cs = cairo_xlib_surface_create(server.dsp, pmap, server.visual, battery->area.width, battery->area.height);
+       c = cairo_create(cs);
+       layout = pango_cairo_create_layout(c);
+
+       // check width
+       pango_layout_set_font_description(layout, bat1_font_desc);
+       pango_layout_set_indent(layout, 0);
+       pango_layout_set_text(layout, buf_bat_percentage, strlen(buf_bat_percentage));
+       pango_layout_get_pixel_size(layout, &percentage_width, NULL);
+
+       pango_layout_set_font_description(layout, bat2_font_desc);
+       pango_layout_set_indent(layout, 0);
+       pango_layout_set_text(layout, buf_bat_time, strlen(buf_bat_time));
+       pango_layout_get_pixel_size(layout, &time_width, NULL);
+
+       if(percentage_width > time_width) new_width = percentage_width;
+       else new_width = time_width;
+
+       new_width += (2*battery->area.paddingxlr) + (2*battery->area.pix.border.width);
+
+       if(new_width > battery->area.width || new_width < (battery->area.width-6)) {
+               int i;
+               Panel *panel = ((Area*)obj)->panel;
+
+               printf("battery_width %d, new_width %d\n", battery->area.width, new_width);
+
+               // resize battery
+               // we try to limit the number of resize
+               battery->area.width = new_width + 1;
+               battery->area.posx = panel->area.width - battery->area.width - panel->area.paddingxlr - panel->area.pix.border.width;
+               if (panel->clock.area.on_screen)
+                       battery->area.posx -= (panel->clock.area.width + panel->area.paddingx);
+
+               // resize other objects on panel
+               for (i=0 ; i < nb_panel ; i++)
+                       panel1[i].area.resize = 1;
+
+               systray.area.resize = 1;
+               panel_refresh = 1;
+       }
+
+       g_object_unref (layout);
+       cairo_destroy (c);
+       cairo_surface_destroy (cs);
+       XFreePixmap (server.dsp, pmap);
+}
+

diff --git a/src/battery/battery.h b/src/battery/battery.h
new file mode 100644 (file)
index 0000000..433be7f
--- /dev/null
+++ b/src/battery/battery.h
@@ -0,0 +1,62 @@
+/**************************************************************************
+* Copyright (C) 2009 Sebastian Reichel <elektranox@gmail.com>
+*
+* Battery with functional data (percentage, time to life) and drawing data
+* (area, font, ...). Each panel use his own drawing data.
+*
+**************************************************************************/
+
+#ifndef BATTERY_H
+#define BATTERY_H
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "common.h"
+#include "area.h"
+
+typedef struct Battery {
+   // always start with area
+   Area area;
+
+   config_color font;
+   int bat1_posy;
+   int bat2_posy;
+} Battery;
+
+enum chargestate {
+       BATTERY_UNKNOWN,
+       BATTERY_CHARGING,
+       BATTERY_DISCHARGING
+};
+
+typedef struct battime {
+       int16_t hours;
+       int8_t minutes;
+       int8_t seconds;
+} battime;
+
+typedef struct batstate {
+       int percentage;
+       struct battime time;
+       enum chargestate state;
+} batstate;
+
+extern struct batstate battery_state;
+extern PangoFontDescription *bat1_font_desc;
+extern PangoFontDescription *bat2_font_desc;
+
+extern int8_t battery_low_status;
+extern char* battery_low_cmd;
+
+// initialize clock : y position, ...
+void update_battery(struct batstate *data);
+
+void init_battery();
+
+void draw_battery(void *obj, cairo_t *c, int active);
+
+void resize_battery(void *obj);
+
+#endif