Method findRealWindow

tools/os.cpp:318–359

Taken from KSnapshot. Oh KDE, what would I do without you :D

#ifdef Q_OS_LINUX
// Taken from KSnapshot. Oh KDE, what would I do without you :D
Window os::findRealWindow(Window w, int depth)
{
    if (depth > 5) {
        return None;
    }

    static Atom wm_state = XInternAtom(QX11Info::display(), "WM_STATE", False);
    Atom type;
    int format;
    unsigned long nitems, after;
    unsigned char *prop;

    if (XGetWindowProperty(QX11Info::display(), w, wm_state, 0, 0, False, AnyPropertyType,
                           &type, &format, &nitems, &after, &prop) == Success) {
        if (prop != NULL) {
            XFree(prop);
        }

        if (type != None) {
            return w;
        }
    }

    Window root, parent;
    Window *children;
    unsigned int nchildren;
    Window ret = None;

    if (XQueryTree(QX11Info::display(), w, &root, &parent, &children, &nchildren) != 0) {
        for (unsigned int i = 0;
                i < nchildren && ret == None;
                ++i) {
            ret = os::findRealWindow(children[ i ], depth + 1);
        }

        if (children != NULL) {
            XFree(children);
        }
    }

    return ret;
}

Window os::windowUnderCursor(bool includeDecorations)
{