bool XSettingsManager::init(Display* dpy, int screen) {
if(manager_data)
return true;
manager_data = new XSettingsData;
manager_data->display = dpy;
manager_data->screen = screen;
manager_data->manager_win = None;
manager_data->settings = NULL;
char buff[256];
sprintf(buff, "_XSETTINGS_S%d", manager_data->screen);
manager_data->selection_atom = XInternAtom(manager_data->display, buff, False);
manager_data->xsettings_atom = XInternAtom(manager_data->display, "_XSETTINGS_SETTINGS", False);
manager_data->manager_atom = XInternAtom(manager_data->display, "MANAGER", False);
manager_data->serial = 0;
Window root = RootWindow(manager_data->display, manager_data->screen);
manager_data->manager_win = XCreateSimpleWindow(manager_data->display, root, 0, 0, 10, 10, 0,
WhitePixel(manager_data->display, manager_data->screen),
WhitePixel(manager_data->display, manager_data->screen));
XSelectInput(manager_data->display, manager_data->manager_win, PropertyChangeMask);
Time timestamp = get_server_time(manager_data->display, manager_data->manager_win);
XSetSelectionOwner(manager_data->display, manager_data->selection_atom, manager_data->manager_win, timestamp);
// check if we got ownership
if(XGetSelectionOwner(manager_data->display, manager_data->selection_atom) == manager_data->manager_win) {
XClientMessageEvent xev;
xev.type = ClientMessage;
xev.window = root;
xev.message_type = manager_data->manager_atom;
xev.format = 32;
xev.data.l[0] = timestamp;
xev.data.l[1] = manager_data->selection_atom;
xev.data.l[2] = manager_data->manager_win;
xev.data.l[3] = 0; // manager specific data
xev.data.l[4] = 0; // manager specific data
XSendEvent(manager_data->display, root, False, StructureNotifyMask, (XEvent*)&xev);
return true;
}
/*
* allow init() be called again
* FIXME: really should this exists here ?
*/
clear();
return false;
}
XSettingsManager *
xsettings_manager_new (Display *display,
int screen,
XSettingsTerminateFunc terminate,
void *cb_data)
{
XSettingsManager *manager;
Time timestamp;
XClientMessageEvent xev;
char buffer[256];
manager = malloc (sizeof *manager);
if (!manager)
return NULL;
manager->display = display;
manager->screen = screen;
sprintf(buffer, "_XSETTINGS_S%d", screen);
manager->selection_atom = XInternAtom (display, buffer, False);
manager->xsettings_atom = XInternAtom (display, "_XSETTINGS_SETTINGS", False);
manager->manager_atom = XInternAtom (display, "MANAGER", False);
manager->terminate = terminate;
manager->cb_data = cb_data;
manager->settings = NULL;
manager->serial = 0;
manager->window = XCreateSimpleWindow (display,
RootWindow (display, screen),
0, 0, 10, 10, 0,
WhitePixel (display, screen),
WhitePixel (display, screen));
XSelectInput (display, manager->window, PropertyChangeMask);
timestamp = get_server_time (display, manager->window);
XSetSelectionOwner (display, manager->selection_atom,
manager->window, timestamp);
/* Check to see if we managed to claim the selection. If not,
* we treat it as if we got it then immediately lost it
*/
if (XGetSelectionOwner (display, manager->selection_atom) ==
manager->window)
{
xev.type = ClientMessage;
xev.window = RootWindow (display, screen);
xev.message_type = manager->manager_atom;
xev.format = 32;
xev.data.l[0] = timestamp;
xev.data.l[1] = manager->selection_atom;
xev.data.l[2] = manager->window;
xev.data.l[3] = 0; /* manager specific data */
xev.data.l[4] = 0; /* manager specific data */
XSendEvent (display, RootWindow (display, screen),
False, StructureNotifyMask, (XEvent *)&xev);
}
else
{
manager->terminate (manager->cb_data);
}
return manager;
}