void
meta_stack_tracker_record_lower (MetaStackTracker *tracker,
Window window,
gulong serial)
{
meta_stack_tracker_record_raise_above (tracker, window, None, serial);
}
/*
* This function is used to avoid raising a window above popup
* menus and other such things.
*
* The key to the operation of this function is that we are expecting
* at most one window to be added at a time. If xwindow is newly added,
* then its own stack position will be too high (the frame window
* is created at the top of the stack), but if we ignore xwindow,
* then the *next* managed window in the stack will be a window that
* we've already stacked.
*
* We could generalize this and remove the assumption that windows
* are added one at a time by keeping an explicit ->stacked flag in
* MetaWindow.
*
* An alternate approach would be to reverse the stacking algorithm to
* work by placing each window above the others, and start by lowering
* a window to the bottom (instead of the current way, which works by
* placing each window below another and starting with a raise)
*/
static void
raise_window_relative_to_managed_windows (MetaScreen *screen,
Window xwindow)
{
Window *children;
int n_children;
int i;
meta_stack_tracker_get_stack (screen->stack_tracker,
&children, &n_children);
/* Children are in order from bottom to top. We want to
* find the topmost managed child, then configure
* our window to be above it.
*/
i = n_children - 1;
while (i >= 0)
{
if (children[i] == xwindow)
{
/* Do nothing. This means we're already the topmost managed
* window, but it DOES NOT mean we are already just above
* the topmost managed window. This is important because if
* an override redirect window is up, and we map a new
* managed window, the new window is probably above the old
* popup by default, and we want to push it below that
* popup. So keep looking for a sibling managed window
* to be moved below.
*/
}
else
{
MetaWindow *other = meta_display_lookup_x_window (screen->display,
children[i]);
if (other != NULL && !other->override_redirect && !other->unmanaging)
{
XWindowChanges changes;
/* children[i] is the topmost managed child */
meta_topic (META_DEBUG_STACK,
"Moving 0x%lx above topmost managed child window 0x%lx\n",
xwindow, children[i]);
changes.sibling = children[i];
changes.stack_mode = Above;
meta_error_trap_push (screen->display);
meta_stack_tracker_record_raise_above (screen->stack_tracker,
xwindow,
children[i],
XNextRequest (screen->display->xdisplay));
XConfigureWindow (screen->display->xdisplay,
xwindow,
CWSibling | CWStackMode,
&changes);
meta_error_trap_pop (screen->display);
break;
}
}
--i;
}
if (i < 0)
{
/* No sibling to use, just lower ourselves to the bottom
* to be sure we're below any override redirect windows.
*/
meta_error_trap_push (screen->display);
meta_stack_tracker_record_lower (screen->stack_tracker,
xwindow,
XNextRequest (screen->display->xdisplay));
XLowerWindow (screen->display->xdisplay,
xwindow);
meta_error_trap_pop (screen->display);
}
}
