A 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);
+}
+

A 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