Desktop
/* $Id: tasks.c,v 1.9 2009/08/10 01:09:11 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_ACTIVE_WINDOW = 0,
TASKS_ATOM_NET_CLIENT_LIST,
TASKS_ATOM_NET_WM_ICON,
TASKS_ATOM_NET_WM_NAME,
TASKS_ATOM_NET_WM_VISIBLE_NAME,
TASKS_ATOM_NET_WM_WINDOW_TYPE,
TASKS_ATOM_NET_WM_WINDOW_TYPE_NORMAL,
TASKS_ATOM_UTF8_STRING
} TasksAtom;
#define TASKS_ATOM_LAST TASKS_ATOM_UTF8_STRING
#define TASKS_ATOM_COUNT (TASKS_ATOM_LAST + 1)
typedef struct _Tasks Tasks;
typedef struct _Task
{
Tasks * tasks;
Window window;
GtkWidget * widget;
gboolean delete;
} Task;
struct _Tasks
{
Task ** tasks;
size_t tasks_cnt;
GtkWidget * hbox;
int icon_width;
int icon_height;
Atom atom[TASKS_ATOM_COUNT];
GdkDisplay * display;
GdkScreen * screen;
GdkWindow * root;
};
/* constants */
static const char * _tasks_atom[TASKS_ATOM_COUNT] =
{
"_NET_ACTIVE_WINDOW",
"_NET_CLIENT_LIST",
"_NET_WM_ICON",
"_NET_WM_NAME",
"_NET_WM_VISIBLE_NAME",
"_NET_WM_WINDOW_TYPE",
"_NET_WM_WINDOW_TYPE_NORMAL",
"UTF8_STRING"
};
/* prototypes */
/* task */
static Task * _task_new(Tasks * tasks, Window window, char const * name,
GdkPixbuf * pixbuf);
static void _task_delete(Task * Task);
static void _task_set(Task * task, char const * name, GdkPixbuf * pixbuf);
/* tasks */
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 void _on_clicked(GtkWidget * widget, gpointer data);
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 */
/* Task */
/* task_new */
static Task * _task_new(Tasks * tasks, Window window, char const * name,
GdkPixbuf * pixbuf)
{
Task * task;
if((task = malloc(sizeof(*task))) == NULL)
return NULL;
task->tasks = tasks;
task->window = window;
task->widget = gtk_button_new();
task->delete = FALSE;
#ifndef EMBEDDED
gtk_button_set_alignment(GTK_BUTTON(task->widget), 0.0, 0.5);
gtk_widget_set_size_request(task->widget, 100, -1);
#endif
g_signal_connect(task->widget, "clicked", G_CALLBACK(_on_clicked),
task);
_task_set(task, name, pixbuf);
return task;
}
/* task_delete */
static void _task_delete(Task * task)
{
gtk_container_remove(GTK_CONTAINER(task->tasks->hbox), task->widget);
free(task);
}
/* task_set */
static void _task_set(Task * task, char const * name, GdkPixbuf * pixbuf)
{
GtkWidget * image;
#ifndef EMBEDDED
gtk_button_set_label(task->widget, name);
#endif
gtk_widget_set_tooltip_text(task->widget, name);
if((image = gtk_button_get_image(GTK_BUTTON(task->widget))) == NULL)
{
if(pixbuf != NULL)
image = gtk_image_new_from_pixbuf(pixbuf);
else
image = gtk_image_new_from_stock(
GTK_STOCK_MISSING_IMAGE,
GTK_ICON_SIZE_LARGE_TOOLBAR);
gtk_button_set_image(GTK_BUTTON(task->widget), image);
}
else if(pixbuf != NULL)
gtk_image_set_from_pixbuf(GTK_IMAGE(image), pixbuf);
else
gtk_image_set_from_stock(GTK_IMAGE(image),
GTK_STOCK_MISSING_IMAGE,
GTK_ICON_SIZE_LARGE_TOOLBAR);
}
/* Tasks */
/* tasks_init */
static GtkWidget * _tasks_init(PanelApplet * applet)
{
Tasks * tasks;
if((tasks = malloc(sizeof(*tasks))) == NULL)
return NULL;
applet->priv = tasks;
tasks->tasks = NULL;
tasks->tasks_cnt = 0;
tasks->hbox = gtk_hbox_new(TRUE, 0);
g_signal_connect(G_OBJECT(tasks->hbox), "screen-changed", G_CALLBACK(
_on_screen_changed), tasks);
tasks->icon_width = 48;
tasks->icon_height = 48;
gtk_icon_size_lookup(GTK_ICON_SIZE_LARGE_TOOLBAR, &tasks->icon_width,
&tasks->icon_height);
tasks->display = NULL;
tasks->screen = NULL;
tasks->root = NULL;
return tasks->hbox;
}
/* tasks_destroy */
static void _tasks_destroy(PanelApplet * applet)
{
Tasks * tasks = applet->priv;
size_t i;
for(i = 0; i < tasks->tasks_cnt; i++)
free(tasks->tasks[i]);
free(tasks->tasks);
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
gdk_error_trap_push();
res = XGetTextProperty(GDK_DISPLAY_XDISPLAY(tasks->display), window,
&text, property);
if(gdk_error_trap_pop() != 0 || res == 0)
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
gdk_error_trap_push();
res = XGetWindowProperty(GDK_DISPLAY_XDISPLAY(tasks->display), window,
tasks->atom[property], 0, G_MAXLONG, False, atom,
&type, &format, cnt, &bytes, ret);
if(gdk_error_trap_pop() != 0 || 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 int _do_tasks_add(Tasks * tasks, Window window, char const * name,
GdkPixbuf * pixbuf);
static void _do_tasks_clean(Tasks * tasks);
static int _do_typehint_normal(Tasks * tasks, Window window);
static void _tasks_do(Tasks * tasks)
{
unsigned long cnt = 0;
Window * windows = NULL;
unsigned long i;
char * name;
#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 < tasks->tasks_cnt; i++)
tasks->tasks[i]->delete = TRUE;
for(i = 0; i < cnt; i++)
{
if(_do_typehint_normal(tasks, windows[i]) != 0)
continue;
if((name = _do_name(tasks, windows[i])) == NULL)
continue;
_do_tasks_add(tasks, windows[i], name, _do_pixbuf(tasks,
windows[i]));
g_free(name);
}
_do_tasks_clean(tasks);
XFree(windows);
}
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;
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)
{
GdkPixbuf * ret;
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;
GdkPixbuf * p;
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 == 0 || height == 0 || width != height)
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 */
}
p = gdk_pixbuf_new_from_data(pixbuf, GDK_COLORSPACE_RGB,
TRUE, 8, width, height, width * 4,
(GdkPixbufDestroyNotify)free, NULL);
XFree(buf);
if(width == tasks->icon_width)
return p;
ret = gdk_pixbuf_scale_simple(p, tasks->icon_width,
tasks->icon_height,
GDK_INTERP_BILINEAR);
g_object_unref(p);
return ret;
}
return NULL;
}
static int _do_tasks_add(Tasks * tasks, Window window, char const * name,
GdkPixbuf * pixbuf)
{
size_t i;
Task * p = NULL;
Task ** q;
for(i = 0; i < tasks->tasks_cnt; i++)
if(tasks->tasks[i]->window == window)
break;
if(i < tasks->tasks_cnt)
{
p = tasks->tasks[i];
#ifndef EMBEDDED
gtk_button_set_label(GTK_BUTTON(p->widget), name);
#endif
_task_set(p, name, pixbuf);
p->delete = FALSE;
}
else
{
if((q = realloc(tasks->tasks, (tasks->tasks_cnt + 1)
* sizeof(*q))) == NULL)
return 1;
tasks->tasks = q;
if((p = _task_new(tasks, window, name, pixbuf)) == NULL)
return 1;
tasks->tasks[tasks->tasks_cnt++] = p;
gtk_widget_show_all(p->widget);
gtk_box_pack_start(GTK_BOX(tasks->hbox), p->widget, FALSE, TRUE,
0);
}
return 0;
}
static void _do_tasks_clean(Tasks * tasks)
{
size_t i;
size_t cnt;
size_t j;
Task ** q;
for(i = 0, cnt = tasks->tasks_cnt; i < cnt;)
{
if(tasks->tasks[i]->delete == FALSE)
{
i++;
continue;
}
_task_delete(tasks->tasks[i]);
cnt--;
for(j = i; j < cnt; j++)
tasks->tasks[j] = tasks->tasks[j + 1];
if((q = realloc(tasks->tasks, cnt * sizeof(*q))) != NULL
|| cnt == 0)
tasks->tasks = q;
}
tasks->tasks_cnt = cnt;
}
static int _do_typehint_normal(Tasks * tasks, Window window)
{
Atom typehint;
Atom * p;
unsigned long cnt = 0;
if(_tasks_get_window_property(tasks, window,
TASKS_ATOM_NET_WM_WINDOW_TYPE, XA_ATOM, &cnt,
(void*)&p) == 0)
{
typehint = *p;
XFree(p);
return typehint == tasks->atom[
TASKS_ATOM_NET_WM_WINDOW_TYPE_NORMAL] ? 0 : 1;
}
/* FIXME return 1 if WM_TRANSIENT_FOR is set */
return 0;
}
/* callbacks */
/* on_clicked */
static void _clicked_activate(Task * task);
static void _on_clicked(GtkWidget * widget, gpointer data)
{
Task * task = data;
_clicked_activate(task);
}
static void _clicked_activate(Task * task)
{
GdkDisplay * display;
XEvent xev;
display = task->tasks->display;
xev.xclient.type = ClientMessage;
xev.xclient.window = task->window;
xev.xclient.message_type = task->tasks->atom[
TASKS_ATOM_NET_ACTIVE_WINDOW];
xev.xclient.format = 32;
xev.xclient.data.l[0] = 2;
xev.xclient.data.l[1] = gdk_x11_display_get_user_time(display);
xev.xclient.data.l[2] = GDK_WINDOW_XWINDOW(task->tasks->root);
gdk_error_trap_push();
XSendEvent(GDK_DISPLAY_XDISPLAY(display),
GDK_WINDOW_XWINDOW(task->tasks->root), False,
SubstructureNotifyMask | SubstructureRedirectMask,
&xev);
gdk_error_trap_pop();
}
/* 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);
}