padding: 0px 5px 55px 5px;
vertical-align: bottom
}
+ .servercount {
+ margin-right: 0.5em;
+ font-size: 70%;
+ }
+ .timestamp {
+ margin-right: 0.8em;
+ }
+ .timestamp:hover, .timestamp:hover .servertimestamps {
+ background-color: #556;
+ }
+ .timestamp:hover .servertimestamps {
+ display: block;
+ }
+ .servertimestamps {
+ display: none;
+ position: absolute;
+ left: 3em;
+ z-index: 1;
+ border: 1px solid black;
+ border-radius: 5px;
+ padding-left: 5px;
+ padding-right: 5px;
+ }
img { width: 1px; height: 1px; }
iframe { display: none }
#status span { margin-right: 10px; }
var session = Math.random(); // For outgoing message IDs
var since = {}; // server -> time: For fetch?since=
var seen = {}; // seen_key -> message
+ var history = []; // List of messages sorted by Time
+ // Messages have these fields:
+ // Time: The timestamp. Median of ServerTimes
+ // ID: Some unique string for deduping
+ // Text: The text of the message
+ // ServerTimes: server -> timestamp
+ // UI: The DOM node for this message in the UI
function rcnick() {
var nick = localStorage.getItem("nick");
return d + " " + pad(h) + ":" + pad(m) + ":" + pad(s);
}
- function rcaddmessagetohistory(message) {
+ function rcaddservertimestamptohover(message, server) {
+ var divs = message.UI.getElementsByTagName("div");
+ for (var i in divs) {
+ if (divs[i].getAttribute && divs[i].getAttribute("class") == "servertimestamps") {
+ var d = document.createElement("div");
+ function pad(x) {
+ return (x < 10 ? "00" : (x < 100 ? "0" : "")) + x;
+ }
+ var text = rcformattime(message.ServerTimes[server]) + "." + pad(message.ServerTimes[server].getUTCMilliseconds()) + " " + server;
+ d.appendChild(document.createTextNode(text));
+ divs[i].appendChild(d);
+ }
+ }
+ }
+
+ function rcmakemessageUI(message) {
message.UI = document.createElement("div");
- var text = (message.Time ? rcformattime(message.Time) : "") + " " + message.Text;
- message.UI.appendChild(document.createTextNode(text));
+
+ // Server count
+ var servercount = document.createElement("span");
+ servercount.setAttribute("class", "servercount");
+ servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
+ message.UI.appendChild(servercount);
+
+ // Timestamp
+ var timestamp_text = message.Time ? rcformattime(message.Time) : "";
+ var timestamp = document.createElement("span");
+ timestamp.setAttribute("class", "timestamp");
+ timestamp.appendChild(document.createTextNode(timestamp_text));
+ message.UI.appendChild(timestamp);
+
+ // Timestamp hover
+ var timestamp_hover = document.createElement("div");
+ timestamp_hover.setAttribute("class", "servertimestamps");
+ timestamp.appendChild(timestamp_hover);
+ for (var server in message.ServerTimes) {
+ rcaddservertimestamptohover(message, server);
+ }
+
+ // Classify different message types
+ var text_span = document.createElement("span");
+ var type;
+ if (/^\*\*\* /.test(message.Text)) {
+ type = "status";
+ } else if (/^\* /.test(message.Text)) {
+ type = "me";
+ } else {
+ type = "text";
+ }
+ if (Object.keys(message.ServerTimes).length == 0) {
+ type += " self";
+ }
+ text_span.setAttribute("class", type);
+ text_span.appendChild(document.createTextNode(message.Text));
+ message.UI.appendChild(text_span);
+ }
+
+ function rcaddmessagetohistory(message) {
+ var message_i;
+ if (message.Time) {
+ for (var i = history.length - 1; ; i--) {
+ if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
+ message_i = i+1;
+ history.splice(message_i, 0, message);
+ break;
+ }
+ }
+ } else {
+ history.push(message);
+ message_i = history.length-1;
+ }
+
+ if (!message.UI) {
+ rcmakemessageUI(message);
+ }
var h = document.getElementById("history");
- h.appendChild(message.UI);
+ if (message_i + 1 < history.length) {
+ h.insertBefore(message.UI, history[message_i + 1].UI);
+ } else {
+ h.appendChild(message.UI);
+ }
window.scrollTo(0, document.body.scrollHeight);
}
return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
}
+ function rcupdatemessagetime(message) {
+ // Set message.Time to be the median of message.ServerTimes
+ var times = [];
+ for (var i in message.ServerTimes) {
+ times.push(message.ServerTimes[i]);
+ }
+ times.sort();
+ if (times.length % 2) {
+ message.Time = times[(times.length-1)/2];
+ } else {
+ var middle = times.length/2;
+ var difference = times[middle].getTime() - times[middle-1].getTime();
+ message.Time = new Date(times[middle-1].getTime() + difference/2);
+ }
+
+ // This may have broken history's in-sorted-order invariant
+ var hi = history.indexOf(message);
+ if ((history[hi-1] && history[hi-1].Time > message.Time) ||
+ (history[hi+1] && history[hi+1].Time < message.Time)) {
+ history.splice(hi,1);
+ rcaddmessagetohistory(message);
+ }
+
+ // Update the UI
+ var spans = message.UI.getElementsByTagName("span");
+ for (var i in spans) {
+ if (spans[i].getAttribute) {
+ var type = spans[i].getAttribute("class");
+ if (type == "servercount") {
+ spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
+ } else if (type == "timestamp") {
+ spans[i].firstChild.data = rcformattime(message.Time);
+ }
+ }
+ }
+ }
+
function rcreceivemessages(server, messages) {
for (var i in messages) {
var m = messages[i];
m.Time = new Date(m.Time);
var seen_key = make_seen_key(m.ID, m.Text);
- if (!(seen_key in seen)) {
+ if (seen_key in seen) {
+ seen[seen_key].ServerTimes[server] = m.Time;
+ rcupdatemessagetime(seen[seen_key]);
+ rcaddservertimestamptohover(seen[seen_key], server);
+ } else {
+ m.ServerTimes = {};
+ m.ServerTimes[server] = m.Time;
seen[seen_key] = m;
rcaddmessagetohistory(m);
for (var i in servers) {
}
function rcsend(d, message) {
- var id = new Date().getTime() + "-" + session + "-" + Math.random();
- seen[make_seen_key(id, message)] = message;
+ message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
+ seen[make_seen_key(message.ID, message.Text)] = message;
var path = "/speak" +
- "?id=" + encodeURIComponent(id) +
- "&text=" + encodeURIComponent(message);
+ "?id=" + encodeURIComponent(message.ID) +
+ "&text=" + encodeURIComponent(message.Text);
for (var i in servers) {
var uri = rcserverbase(servers[i]) + path;
var img = document.createElement("img");
message = "<" + rcnick() + "> " + input;
}
- var m = {'Text': message};
+ var m = {'Text': message, 'ServerTimes': {}};
rcaddmessagetohistory(m);
rcsend(m.UI, m);
}
projects / reliable-chat / blobdiff