// determine which monitor holds the active window, or failing that the mouse pointer
void monitor_active ( Display *display, workarea *mon )
{
Screen *screen = DefaultScreenOfDisplay ( display );
Window root = RootWindow ( display, XScreenNumberOfScreen ( screen ) );
int x, y;
Window id;
Atom type;
int count;
if ( config.monitor >= 0 ) {
if ( monitor_get_dimension ( display, screen, config.monitor, mon ) ) {
return;
}
fprintf ( stderr, "Failed to find selected monitor.\n" );
}
if ( window_get_prop ( display, root, netatoms[_NET_ACTIVE_WINDOW], &type, &count, &id, sizeof ( Window ) )
&& type == XA_WINDOW && count > 0 ) {
XWindowAttributes attr;
if ( XGetWindowAttributes ( display, id, &attr ) ) {
Window junkwin;
if ( XTranslateCoordinates ( display, id, attr.root,
-attr.border_width,
-attr.border_width,
&x, &y, &junkwin ) == True ) {
monitor_dimensions ( display, screen, x, y, mon );
return;
}
}
}
if ( pointer_get ( display, root, &x, &y ) ) {
monitor_dimensions ( display, screen, x, y, mon );
return;
}
monitor_dimensions ( display, screen, 0, 0, mon );
}
int window_get_cardinal_prop(Window w, Atom atom, unsigned long *list, int count)
{
Atom type; int items;
return window_get_prop(w, atom, &type, &items, list, count*sizeof(unsigned long)) && type == XA_CARDINAL ? items:0;
}
int window_get_atom_prop(Window w, Atom atom, Atom *list, int count)
{
Atom type; int items;
return window_get_prop(w, atom, &type, &items, list, count*sizeof(Atom)) && type == XA_ATOM ? items:0;
}
