Desktop
/* $Id: tasks.c,v 1.2 2009/08/09 00:36:28 khorben Exp $ */
/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Panel */
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>. */
#include <sys/time.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#include "panel.h"
#include "../../config.h"
/* Tasks */
/* private */
/* types */
typedef enum _TasksAtom
{
TASKS_ATOM_NET_CLIENT_LIST = 0,
TASKS_ATOM_NET_WM_ICON,
TASKS_ATOM_NET_WM_NAME,
TASKS_ATOM_NET_WM_VISIBLE_NAME,
TASKS_ATOM_UTF8_STRING
} TasksAtom;
#define TASKS_ATOM_LAST TASKS_ATOM_UTF8_STRING
#define TASKS_ATOM_COUNT (TASKS_ATOM_LAST + 1)
typedef struct _Tasks
{
GtkWidget * hbox;
Atom atom[TASKS_ATOM_COUNT];
GdkDisplay * display;
GdkScreen * screen;
GdkWindow * root;
} Tasks;
/* constants */
static const char * _tasks_atom[TASKS_ATOM_COUNT] =
{
"_NET_CLIENT_LIST",
"_NET_WM_ICON",
"_NET_WM_NAME",
"_NET_WM_VISIBLE_NAME",
"UTF8_STRING"
};
/* prototypes */
static GtkWidget * _tasks_init(PanelApplet * applet);
static void _tasks_destroy(PanelApplet * applet);
/* accessors */
static int _tasks_get_text_property(Tasks * tasks, Window window, Atom property,
char ** ret);
static int _tasks_get_window_property(Tasks * tasks, Window window,
TasksAtom property, Atom atom, unsigned long * cnt,
unsigned char ** ret);
/* useful */
static void _tasks_do(Tasks * tasks);
/* callbacks */
static GdkFilterReturn _on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data);
void _on_screen_changed(GtkWidget * widget, GdkScreen * previous,
gpointer data);
/* public */
/* variables */
PanelApplet applet =
{
NULL,
_tasks_init,
_tasks_destroy,
PANEL_APPLET_POSITION_START,
NULL
};
/* private */
/* functions */
/* tasks_init */
static GtkWidget * _tasks_init(PanelApplet * applet)
{
Tasks * tasks;
if((tasks = malloc(sizeof(*tasks))) == NULL)
return NULL;
applet->priv = tasks;
tasks->hbox = gtk_hbox_new(FALSE, 0);
g_signal_connect(G_OBJECT(tasks->hbox), "screen-changed", G_CALLBACK(
_on_screen_changed), tasks);
tasks->display = NULL;
tasks->screen = NULL;
tasks->root = NULL;
return tasks->hbox;
}
/* tasks_destroy */
static void _tasks_destroy(PanelApplet * applet)
{
Tasks * tasks = applet->priv;
free(tasks);
}
/* accessors */
/* tasks_get_text_property */
static int _tasks_get_text_property(Tasks * tasks, Window window,
Atom property, char ** ret)
{
int res;
XTextProperty text;
int cnt;
char ** list;
int i;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(tasks, window, %lu)\n", __func__, property);
#endif
res = XGetTextProperty(GDK_DISPLAY_XDISPLAY(tasks->display), window,
&text, property);
if(res != True) /* XXX why is it not Success? */
return 1;
cnt = gdk_text_property_to_utf8_list(gdk_x11_xatom_to_atom(
text.encoding), text.format, text.value,
text.nitems, &list);
if(cnt > 0)
{
*ret = list[0];
for(i = 1; i < cnt; i++)
g_free(list[i]);
g_free(list);
}
else
*ret = NULL;
if(text.value != NULL)
XFree(text.value);
return 0;
}
/* tasks_get_window_property */
static int _tasks_get_window_property(Tasks * tasks, Window window,
TasksAtom property, Atom atom, unsigned long * cnt,
unsigned char ** ret)
{
int res;
Atom type;
int format;
unsigned long bytes;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(tasks, window, %s, %lu)\n", __func__,
_tasks_atom[property], atom);
#endif
res = XGetWindowProperty(GDK_DISPLAY_XDISPLAY(tasks->display), window,
tasks->atom[property], 0, G_MAXLONG, False, atom,
&type, &format, cnt, &bytes, ret);
if(res != Success)
return 1;
if(type != atom)
{
if(*ret != NULL)
XFree(*ret);
*ret = NULL;
return 1;
}
return 0;
}
/* tasks_do */
static char * _do_name(Tasks * tasks, Window window);
static char * _do_name_text(Tasks * tasks, Window window, Atom property);
static char * _do_name_utf8(Tasks * tasks, Window window, Atom property);
static GdkPixbuf * _do_pixbuf(Tasks * tasks, Window window);
static void _tasks_do(Tasks * tasks)
{
unsigned long cnt = 0;
Window * windows = NULL;
unsigned long i;
GdkWindow * window;
char * name;
GtkWidget * widget;
GdkPixbuf * pixbuf;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(_tasks_get_window_property(tasks, GDK_WINDOW_XWINDOW(tasks->root),
TASKS_ATOM_NET_CLIENT_LIST,
XA_WINDOW, &cnt, (void*)&windows)
!= 0)
return;
for(i = 0; i < cnt; i++)
{
if((window = gdk_window_foreign_new_for_display(tasks->display,
windows[i])) == NULL)
continue;
if(gdk_window_get_type_hint(window)
!= GDK_WINDOW_TYPE_HINT_NORMAL)
continue;
if((name = _do_name(tasks, windows[i])) == NULL)
continue;
widget = gtk_button_new_with_label(name);
if((pixbuf = _do_pixbuf(tasks, windows[i])) != NULL)
gtk_button_set_image(GTK_BUTTON(widget),
gtk_image_new_from_pixbuf(pixbuf));
gtk_widget_set_size_request(widget, 100, -1);
gtk_widget_show_all(widget);
gtk_box_pack_start(GTK_BOX(tasks->hbox), widget, FALSE, TRUE,
2);
g_free(name);
}
}
static char * _do_name(Tasks * tasks, Window window)
{
char * ret;
if((ret = _do_name_utf8(tasks, window, TASKS_ATOM_NET_WM_VISIBLE_NAME))
!= NULL)
return ret;
if((ret = _do_name_utf8(tasks, window, TASKS_ATOM_NET_WM_NAME)) != NULL)
return ret;
if((ret = _do_name_text(tasks, window, XA_WM_NAME)) != NULL)
return ret;
return g_strdup("(Untitled)");
}
static char * _do_name_text(Tasks * tasks, Window window, Atom property)
{
char * ret = NULL;
if(_tasks_get_text_property(tasks, window, property, (void*)&ret) != 0)
return NULL;
/* FIXME convert to UTF-8 */
return ret;
}
static char * _do_name_utf8(Tasks * tasks, Window window, Atom property)
{
char * ret = NULL;
char * str = NULL;
unsigned long cnt = 0;
if(_tasks_get_window_property(tasks, window, property,
tasks->atom[TASKS_ATOM_UTF8_STRING], &cnt,
(void*)&str) != 0)
return NULL;
if(g_utf8_validate(str, cnt, NULL))
ret = g_strndup(str, cnt);
XFree(str);
return ret;
}
static GdkPixbuf * _do_pixbuf(Tasks * tasks, Window window)
{
unsigned long cnt = 0;
unsigned long * buf = NULL;
unsigned long i;
unsigned long width;
unsigned long height;
unsigned long size;
unsigned char * pixbuf;
unsigned long j;
if(_tasks_get_window_property(tasks, window, TASKS_ATOM_NET_WM_ICON,
XA_CARDINAL, &cnt, (void*)&buf) != 0)
return NULL;
for(i = 0; i < cnt - 3; i++)
{
width = buf[i];
height = buf[i + 1];
if(i + 2 + (width * height) > cnt)
break;
if(width != 48 || height != 48)
continue;
size = width * height * 4;
if((pixbuf = malloc(size)) == NULL)
return NULL;
for(i+=2, j = 0; j < size; i++)
{
pixbuf[j++] = (buf[i] >> 16) & 0xff; /* red */
pixbuf[j++] = (buf[i] >> 8) & 0xff; /* green */
pixbuf[j++] = buf[i] & 0xff; /* blue */
pixbuf[j++] = buf[i] >> 24; /* alpha */
}
return gdk_pixbuf_new_from_data(pixbuf, GDK_COLORSPACE_RGB,
TRUE, 8, width, height, width * 4,
(GdkPixbufDestroyNotify)free, NULL);
}
return NULL;
}
/* callbacks */
/* on_filter */
static GdkFilterReturn _on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data)
{
Tasks * tasks = data;
XEvent * xev = xevent;
if(xev->type != PropertyNotify)
return GDK_FILTER_CONTINUE;
if(xev->xproperty.atom != tasks->atom[TASKS_ATOM_NET_CLIENT_LIST])
return GDK_FILTER_CONTINUE;
_tasks_do(tasks);
return GDK_FILTER_CONTINUE;
}
/* on_screen_changed */
void _on_screen_changed(GtkWidget * widget, GdkScreen * previous, gpointer data)
{
Tasks * tasks = data;
GdkEventMask events;
size_t i;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
tasks->screen = gtk_widget_get_screen(widget);
tasks->display = gdk_screen_get_display(tasks->screen);
tasks->root = gdk_screen_get_root_window(tasks->screen);
events = gdk_window_get_events(tasks->root);
gdk_window_set_events(tasks->root, events
| GDK_PROPERTY_CHANGE_MASK);
gdk_window_add_filter(tasks->root, _on_filter, tasks);
/* atoms */
for(i = 0; i < TASKS_ATOM_COUNT; i++)
tasks->atom[i] = gdk_x11_get_xatom_by_name_for_display(
tasks->display, _tasks_atom[i]);
_tasks_do(tasks);
}