Client *FocusChain::nextForDesktop(Client *reference, uint desktop) const
{
DesktopChains::const_iterator it = m_desktopFocusChains.find(desktop);
if (it == m_desktopFocusChains.end()) {
return NULL;
}
const QList<Client*> &chain = it.value();
for (int i = chain.size() - 1; i >= 0; --i) {
Client* client = chain.at(i);
if (isUsableFocusCandidate(client, reference)) {
return client;
}
}
return NULL;
}
// deactivates 'c' and activates next client
bool Workspace::activateNextClient(Client* c)
{
// if 'c' is not the active or the to-become active one, do nothing
if (!(c == active_client || (should_get_focus.count() > 0 && c == should_get_focus.last())))
return false;
closeActivePopup();
if (c != NULL) {
if (c == active_client)
setActiveClient(NULL, Allowed);
should_get_focus.removeAll(c);
}
// if blocking focus, move focus to the desktop later if needed
// in order to avoid flickering
if (!focusChangeEnabled()) {
focusToNull();
return true;
}
if (!options->focusPolicyIsReasonable())
return false;
Client* get_focus = NULL;
if (options->isNextFocusPrefersMouse()) {
get_focus = clientUnderMouse(c ? c->screen() : activeScreen());
if (get_focus && (get_focus == c || get_focus->isDesktop())) {
// should rather not happen, but it cannot get the focus. rest of usability is tested above
get_focus = 0;
}
}
if (!get_focus) { // no suitable window under the mouse -> find sth. else
// first try to pass the focus to the (former) active clients leader
if (c && (get_focus = c->transientFor()) && isUsableFocusCandidate(get_focus, c, options->isSeparateScreenFocus())) {
raiseClient(get_focus); // also raise - we don't know where it came from
} else {
// nope, ask the focus chain for the next candidate
get_focus = NULL; // reset from the inline assignment above
for (int i = focus_chain[ currentDesktop()].size() - 1; i >= 0; --i) {
Client* ci = focus_chain[ currentDesktop()].at(i);
if (isUsableFocusCandidate(ci, c, options->isSeparateScreenFocus())) {
get_focus = ci;
break; // we're done
}
}
}
}
if (get_focus == NULL) // last chance: focus the desktop
get_focus = findDesktop(true, currentDesktop());
if (get_focus != NULL)
requestFocus(get_focus);
else
focusToNull();
return true;
}
