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#include <X11/Xatom.h>
#include <gdk/gdkx.h>
#include <gdk/gdk.h>
#include <string.h>
#include <glib.h>
#include <glib-object.h>
#include "wm-common.h"
typedef struct _WMCallbackData
{
GFunc func;
gpointer data;
} WMCallbackData;
/* Our WM Window */
static Window wm_window = None;
static char *
wm_common_get_window_manager_property (Atom atom)
{
Atom utf8_string, type;
GdkDisplay *display;
int result;
char *retval;
int format;
gulong nitems;
gulong bytes_after;
gchar *val;
if (wm_window == None)
return NULL;
utf8_string = gdk_x11_get_xatom_by_name ("UTF8_STRING");
display = gdk_display_get_default ();
gdk_x11_display_error_trap_push (display);
val = NULL;
result = XGetWindowProperty (GDK_DISPLAY_XDISPLAY(display),
wm_window,
atom,
0, G_MAXLONG,
False, utf8_string,
&type, &format, &nitems,
&bytes_after, (guchar **) &val);
if (gdk_x11_display_error_trap_pop (display) || result != Success ||
type != utf8_string || format != 8 || nitems == 0 ||
!g_utf8_validate (val, nitems, NULL))
{
retval = NULL;
}
else
{
retval = g_strndup (val, nitems);
}
if (val)
XFree (val);
return retval;
}
char*
wm_common_get_current_window_manager (void)
{
Atom atom = gdk_x11_get_xatom_by_name ("_NET_WM_NAME");
char *result;
result = wm_common_get_window_manager_property (atom);
if (result)
return result;
else
return g_strdup (WM_COMMON_UNKNOWN);
}
char**
wm_common_get_current_keybindings (void)
{
Atom keybindings_atom = gdk_x11_get_xatom_by_name ("_MATE_WM_KEYBINDINGS");
char *keybindings = wm_common_get_window_manager_property (keybindings_atom);
char **results;
if (keybindings)
{
char **p;
results = g_strsplit(keybindings, ",", -1);
for (p = results; *p; p++)
g_strstrip (*p);
g_free (keybindings);
}
else
{
Atom wm_atom = gdk_x11_get_xatom_by_name ("_NET_WM_NAME");
char *wm_name = wm_common_get_window_manager_property (wm_atom);
char *to_copy[] = { NULL, NULL };
to_copy[0] = wm_name ? wm_name : WM_COMMON_UNKNOWN;
results = g_strdupv (to_copy);
g_free (wm_name);
}
return results;
}
static void
update_wm_window (void)
{
GdkDisplay *display;
Window *xwindow;
Atom type;
gint format;
gulong nitems;
gulong bytes_after;
display = gdk_display_get_default ();
XGetWindowProperty (GDK_DISPLAY_XDISPLAY(display), GDK_ROOT_WINDOW (),
gdk_x11_get_xatom_by_name ("_NET_SUPPORTING_WM_CHECK"),
0, G_MAXLONG, False, XA_WINDOW, &type, &format,
&nitems, &bytes_after, (guchar **) &xwindow);
if (type != XA_WINDOW)
{
wm_window = None;
return;
}
gdk_x11_display_error_trap_push (display);
XSelectInput (GDK_DISPLAY_XDISPLAY(display), *xwindow, StructureNotifyMask | PropertyChangeMask);
XSync (GDK_DISPLAY_XDISPLAY(display), False);
if (gdk_x11_display_error_trap_pop (display))
{
XFree (xwindow);
wm_window = None;
return;
}
wm_window = *xwindow;
XFree (xwindow);
}
static GdkFilterReturn
wm_window_event_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
WMCallbackData *ncb_data = (WMCallbackData*) data;
XEvent *xevent = (XEvent *)xev;
if ((xevent->type == DestroyNotify &&
wm_window != None && xevent->xany.window == wm_window) ||
(xevent->type == PropertyNotify &&
xevent->xany.window == GDK_ROOT_WINDOW () &&
xevent->xproperty.atom == (gdk_x11_get_xatom_by_name ("_NET_SUPPORTING_WM_CHECK"))) ||
(xevent->type == PropertyNotify &&
wm_window != None && xevent->xany.window == wm_window &&
xevent->xproperty.atom == (gdk_x11_get_xatom_by_name ("_NET_WM_NAME"))))
{
update_wm_window ();
(* ncb_data->func) ((gpointer)wm_common_get_current_window_manager(),
ncb_data->data);
}
return GDK_FILTER_CONTINUE;
}
void
wm_common_register_window_manager_change (GFunc func,
gpointer data)
{
WMCallbackData *ncb_data;
ncb_data = g_new0 (WMCallbackData, 1);
ncb_data->func = func;
ncb_data->data = data;
gdk_window_add_filter (NULL, wm_window_event_filter, ncb_data);
update_wm_window ();
XSelectInput (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), GDK_ROOT_WINDOW (), PropertyChangeMask);
XSync (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), False);
}
void
wm_common_update_window ()
{
update_wm_window();
}
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