// a, b are indices into the chat history
static Web chatLinesAsWeb(int a, int b) {
  ret chatLinesAsWeb(stefansChat_readHistory_fullMsgs(a, b));
}

static Web chatLinesAsWeb(L<ChatMsg> msgs) {
  Web web = simpleWeb();
  new L<WebNode> nodes;
  for i over msgs: {
    ChatMsg msg = msgs.get(i);
    nodes.add(web.node("Text " + quote(msg.text)));
    web_addRelation(nextToLast(nodes), last(nodes), 'then);
    web_setPosition(last(nodes), 0.5, 0.2+i*0.6/max(1, l(msgs)-1));
  }
  ret web;
}