+
+ bool const activate = (cmd.action() == LFUN_BRANCH_ACTIVATE
+ || cmd.action() == LFUN_BRANCH_MASTER_ACTIVATE);
+ if (our_branch->isSelected() != activate) {
+ // FIXME If the branch is in the master document, we cannot
+ // call recordUndo..., because the master may be hidden, and
+ // the code presently assumes that hidden documents can never
+ // be dirty. See GuiView::closeBufferAll(), for example.
+ // An option would be to check if the master is hidden.
+ // If it is, unhide.
+ if (!master)
+ buffer().undo().recordUndoBufferParams(cur);
+ else
+ // at least issue a warning for now (ugly, but better than dataloss).
+ frontend::Alert::warning(_("Branch state changes in master document"),
+ lyx::support::bformat(_("The state of the branch '%1$s' "
+ "was changed in the master file. "
+ "Please make sure to save the master."), params_.branch), true);
+ our_branch->setSelected(activate);
+ // cur.forceBufferUpdate() is not enough
+ buf->updateBuffer();
+ }
+
+ // if branch exists in a descendant, update previews.
+ // TODO: only needed if "Show preview" is enabled in the included inset.
+ bool exists_in_desc = false;
+ for (auto const & it : buf->getDescendants()) {
+ if (it->params().branchlist().find(params_.branch))
+ exists_in_desc = true;
+ }
+ if (exists_in_desc) {
+ // TODO: ideally we would only update the previews of the
+ // specific children that have this branch directly or
+ // in one of their descendants
+ buf->removePreviews();
+ buf->updatePreviews();
+ }