void Selection::_emitChanged(bool persist_selection_context/* = false */) {
if (persist_selection_context) {
if (NULL == _selection_context) {
_selection_context = _layers->currentLayer();
sp_object_ref(_selection_context, NULL);
_context_release_connection = _selection_context->connectRelease(sigc::mem_fun(*this, &Selection::_releaseContext));
}
} else {
_releaseContext(_selection_context);
}
INKSCAPE.selection_changed(this);
_changed_signal.emit(this);
}
/*
* return true if the context was destroyed, false if only its refcount
* got decreased. Note that even if the context was destroyed it may
* still live, if it's the currently selected context (by setContext).
*/
bool releaseContext(uintptr_t context_id)
{
bool res = false;
context_map_mutex.lock();
/*
* This can potentially called (from glX) with an invalid context_id,
* so don't assert on it being valid.
*/
if (context_map.find(context_id) != context_map.end()) {
res = _releaseContext(context_map[context_id]);
if (res)
context_map.erase(context_id);
}
context_map_mutex.unlock();
return res;
}
