+
+void MessageModel::insertMessages(const QList<Message> &msglist) {
+ if(msglist.isEmpty())
+ return;
+
+ if(_messageList.isEmpty()) {
+ insertMessageGroup(msglist);
+ return;
+ }
+
+ bool inOrder = (msglist.first().msgId() < msglist.last().msgId());
+ // depending on the order we have to traverse from the front to the back or vice versa
+ // for the sake of performance we have a little code duplication here
+ // if you need to do some changes here you'll probably need to change them at all
+ // places marked DUPE
+
+
+ // FIXME: keep scrollbars from jumping
+ // the somewhat bulk insert leads to a jumpy scrollbar when the user requests further backlog.
+ // it would probably be the best to stop processing each time we actually insert a messagegroup
+ // and give back controll to the eventloop (similar to what the QtUiMessageProcessor used to do)
+ QList<Message> grouplist;
+ MsgId id;
+ MsgId dupeId;
+ bool fastForward = false;
+ QList<Message>::const_iterator iter;
+ if(inOrder) {
+ iter = msglist.constEnd();
+ iter--; // this op is safe as we've allready passed an empty check
+ } else {
+ iter = msglist.constBegin();
+ }
+
+ // DUPE (1 / 3)
+ int idx = indexForId((*iter).msgId());
+ if(idx >= 0)
+ dupeId = _messageList[idx]->msgId();
+ // we always compare to the previous entry...
+ // if there isn't, we can fastforward to the top
+ if(idx - 1 >= 0) // also safe as we've passed another empty check
+ id = _messageList[idx - 1]->msgId();
+ else
+ fastForward = true;
+ if((*iter).msgId() != dupeId)
+ grouplist << *iter;
+
+ if(!inOrder)
+ iter++;
+
+ if(inOrder) {
+ while(iter != msglist.constBegin()) {
+ iter--;
+ // DUPE (2 / 3)
+ if(!fastForward && (*iter).msgId() < id) {
+ insertMessageGroup(grouplist);
+ grouplist.clear();
+
+ // build new group
+ int idx = indexForId((*iter).msgId());
+ if(idx >= 0)
+ dupeId = _messageList[idx]->msgId();
+ if(idx - 1 >= 0)
+ id = _messageList[idx - 1]->msgId();
+ else
+ fastForward = true;
+ }
+ if((*iter).msgId() != dupeId)
+ grouplist.prepend(*iter);
+ }
+ } else {
+ while(iter != msglist.constEnd()) {
+ // DUPE (3 / 3)
+ if(!fastForward && (*iter).msgId() < id) {
+ insertMessageGroup(grouplist);
+ grouplist.clear();
+
+ // build new group
+ int idx = indexForId((*iter).msgId());
+ if(idx >= 0)
+ dupeId = _messageList[idx]->msgId();
+ if(idx - 1 >= 0)
+ id = _messageList[idx - 1]->msgId();
+ else
+ fastForward = true;
+ }
+ if((*iter).msgId() != dupeId)
+ grouplist.prepend(*iter);
+ iter++;
+ }
+ }
+
+ if(!grouplist.isEmpty()) {
+ insertMessageGroup(grouplist);
+ }
+
+ return;
+}
+
+