adamc@580: function cons(v, ls) {
adamc@580:   return { n : ls, v : v };
adamc@580: }
adamc@670: 
adamc@579: function callAll(ls) {
adamc@585:   for (; ls; ls = ls.n)
adamc@579:     ls.v();
adamc@579: }
adamc@574: 
adamc@580: function sc(v) {
adamc@580:   return {v : v, h : null};
adamc@580: }
adamc@580: function sv(s, v) {
adamc@580:   s.v = v;
adamc@580:   callAll(s.h);
adamc@580: }
adamc@601: function sg(s) {
adamc@601:   return s.v;
adamc@601: }
adamc@579: 
adamc@580: function ss(s) {
adamc@580:   return s;
adamc@580: }
adamc@580: function sr(v) {
adamc@580:   return {v : v, h : null};
adamc@580: }
adamc@580: function sb(x,y) {
adamc@580:   var z = y(x.v);
adamc@580:   var s = {v : z.v, h : null};
adamc@580: 
adamc@580:   function reZ() {
adamc@580:     z.h = cons(function() { s.v = z.v; callAll(s.h); }, z.h);    
adamc@580:   }
adamc@580: 
adamc@580:   x.h = cons(function() { z = y(x.v); reZ(); s.v = z.v; callAll(s.h); }, x.h);
adamc@580:   reZ();
adamc@580: 
adamc@580:   return s;
adamc@580: }
adamc@571: 
adamc@604: function lastParent() {
adamc@604:   var pos = document;
adamc@604: 
adamc@600:   while (pos.lastChild && pos.lastChild.nodeType == 1)
adamc@600:     pos = pos.lastChild;
adamc@600: 
adamc@600:   return pos.parentNode;
adamc@600: }
adamc@600: 
adamc@604: var thisScript = null;
adamc@603: 
adamc@604: function addNode(node) {
adamc@604:   if (thisScript) {
adamc@604:     thisScript.parentNode.appendChild(node);
adamc@604:     thisScript.parentNode.removeChild(thisScript);
adamc@604:   } else
adamc@604:     lastParent().appendChild(node);
adamc@603: }
adamc@603: 
adamc@604: function runScripts(node) {
adamc@604:   var savedScript = thisScript;
adamc@603: 
adamc@646:   var scripts = node.getElementsByTagName("script"), scriptsCopy = {};
adamc@604:   var len = scripts.length;
adamc@646:   for (var i = 0; i < len; ++i)
adamc@646:     scriptsCopy[i] = scripts[i];
adamc@604:   for (var i = 0; i < len; ++i) {
adamc@646:     thisScript = scriptsCopy[i];
adamc@604:     eval(thisScript.textContent);
adamc@604:   }
adamc@604: 
adamc@604:   thisScript = savedScript;
adamc@603: }
adamc@603: 
adamc@603: function populate(node, html) {
adamc@603:   node.innerHTML = html;
adamc@604:   runScripts(node);
adamc@603: }
adamc@603: 
adamc@571: function dyn(s) {
adamc@571:   var x = document.createElement("span");
adamc@604:   populate(x, s.v);
adamc@604:   addNode(x);
adamc@603:   s.h = cons(function() { populate(x, s.v) }, s.h);
adamc@571: }
adamc@582: 
adamc@598: function inp(t, s) {
adamc@598:   var x = document.createElement(t);
adamc@598:   x.value = s.v;
adamc@604:   addNode(x);
adamc@686:   s.h = cons(function() { if (x.value != s.v) x.value = s.v }, s.h);
adamc@598:   x.onkeyup = function() { sv(s, x.value) };
adamc@606:   return x;
adamc@598: }
adamc@598: 
adamc@597: function eh(x) {
adamc@597:   return x.split("&").join("&amp;").split("<").join("&lt;").split(">").join("&gt;");
adamc@597: }
adamc@597: 
adamc@582: function ts(x) { return x.toString() }
adamc@586: function bs(b) { return (b ? "True" : "False") }
adamc@586: 
adamc@649: function pi(s) {
adamc@649:   var r = parseInt(s);
adamc@649:   if (r.toString() == s)
adamc@649:     return r;
adamc@649:   else
adamc@649:     throw "Can't parse int: " + s;
adamc@649: }
adamc@649: 
adamc@649: function pfl(s) {
adamc@649:   var r = parseFloat(s);
adamc@649:   if (r.toString() == s)
adamc@649:     return r;
adamc@649:   else
adamc@649:     throw "Can't parse float: " + s;
adamc@649: }
adamc@649: 
adamc@669: function whine(msg) {
adamc@669:   alert(msg);
adamc@669:   throw msg;
adamc@669: }
adamc@669: 
adamc@649: function pf() {
adamc@669:   whine("Pattern match failure");
adamc@649: }
adamc@589: 
adamc@603: var closures = [];
adamc@603: 
adamc@603: function ca(f) {
adamc@603:   var n = closures.length;
adamc@603:   closures[n] = f;
adamc@603:   return n;
adamc@603: }
adamc@603: 
adamc@603: function cr(n) {
adamc@603:   return closures[n]();
adamc@603: }
adamc@603: 
adamc@609: 
adamc@668: var client_id = 0;
adamc@668: var client_pass = 0;
adamc@668: var url_prefix = "/";
adamc@673: var timeout = 60;
adamc@668: 
adamc@668: function getXHR(uri)
adamc@609: {
adamc@609:   try {
adamc@609:     return new XMLHttpRequest();
adamc@609:   } catch (e) {
adamc@609:     try {
adamc@609:      return new ActiveXObject("Msxml2.XMLHTTP");
adamc@609:     } catch (e) {
adamc@609:       try {
adamc@609:         return new ActiveXObject("Microsoft.XMLHTTP");
adamc@609:       } catch (e) {
adamc@609:         throw "Your browser doesn't seem to support AJAX.";
adamc@609:       }
adamc@609:     }
adamc@609:   }
adamc@609: }
adamc@609: 
adamc@668: function requestUri(xhr, uri) {
adamc@668:   xhr.open("GET", uri, true);
adamc@668: 
adamc@668:   if (client_id != 0) {
adamc@668:     xhr.setRequestHeader("UrWeb-Client", client_id.toString());
adamc@668:     xhr.setRequestHeader("UrWeb-Pass", client_pass.toString());
adamc@668:   }
adamc@668: 
adamc@668:   xhr.send(null);
adamc@668: }
adamc@668: 
adamc@613: function rc(uri, parse, k) {
adamc@609:   var xhr = getXHR();
adamc@609: 
adamc@609:   xhr.onreadystatechange = function() {
adamc@612:     if (xhr.readyState == 4) {
adamc@612:       var isok = false;
adamc@612: 
adamc@612:       try {
adamc@612:         if (xhr.status == 200)
adamc@612:           isok = true;
adamc@612:       } catch (e) { }
adamc@612: 
adamc@612:       if (isok)
adamc@613:         k(parse(xhr.responseText));
adamc@649:       else {
adamc@669:         whine("Error querying remote server!");
adamc@649:       }
adamc@612:     }
adamc@609:   };
adamc@609: 
adamc@668:   requestUri(xhr, uri);
adamc@609: }
adamc@667: 
adamc@667: function path_join(s1, s2) {
adamc@667:   if (s1.length > 0 && s1[s1.length-1] == '/')
adamc@667:     return s1 + s2;
adamc@667:   else
adamc@667:     return s1 + "/" + s2;
adamc@667: }
adamc@667: 
adamc@670: var channels = [];
adamc@670: 
adamc@670: function newQueue() {
adamc@670:   return { front : null, back : null };
adamc@670: }
adamc@670: function enqueue(q, v) {
adamc@670:   if (q.front == null) {
adamc@670:     q.front = cons(v, null);
adamc@670:     q.back = q.front;
adamc@670:   } else {
adamc@670:     var node = cons(v, null);
adamc@670:     q.back.n = node;
adamc@670:     q.back = node;
adamc@670:   }
adamc@670: }
adamc@670: function dequeue(q) {
adamc@670:   if (q.front == null)
adamc@670:     return null;
adamc@670:   else {
adamc@670:     var r = q.front.v;
adamc@670:     q.front = q.front.n;
adamc@670:     if (q.front == null)
adamc@670:       q.back = null;
adamc@670:     return r;
adamc@670:   }
adamc@670: }
adamc@670: 
adamc@670: function newChannel() {
adamc@670:   return { msgs : newQueue(), listeners : newQueue() };
adamc@670: }
adamc@670: 
adamc@667: function listener() {
adamc@668:   var uri = path_join(url_prefix, ".msgs");
adamc@667:   var xhr = getXHR();
adamc@673:   var tid, orsc, onTimeout;
adamc@673: 
adamc@673:   var connect = function () {
adamc@673:     xhr.onreadystatechange = orsc;
adamc@673:     tid = window.setTimeout(onTimeout, timeout * 500);
adamc@673:     requestUri(xhr, uri);
adamc@673:   }
adamc@673: 
adamc@673:   orsc = function() {
adamc@667:     if (xhr.readyState == 4) {
adamc@673:       window.clearTimeout(tid);
adamc@673: 
adamc@667:       var isok = false;
adamc@667: 
adamc@667:       try {
adamc@667:         if (xhr.status == 200)
adamc@667:           isok = true;
adamc@667:       } catch (e) { }
adamc@667: 
adamc@668:       if (isok) {
adamc@669:         var lines = xhr.responseText.split("\n");
adamc@669:         if (lines.length < 2) 
adamc@679:           return; //throw "Empty message from remote server";
adamc@669: 
adamc@669:         for (var i = 0; i+1 < lines.length; i += 2) {
adamc@670:           var chn = lines[i];
adamc@670:           var msg = lines[i+1];
adamc@670: 
adamc@670:           if (chn < 0)
adamc@670:             whine("Out-of-bounds channel in message from remote server");
adamc@670: 
adamc@670:           var ch;
adamc@670: 
adamc@670:           if (chn >= channels.length || channels[chn] == null) {
adamc@670:             ch = newChannel();
adamc@670:             channels[chn] = ch;
adamc@670:           } else
adamc@670:             ch = channels[chn];
adamc@670: 
adamc@670:           var listener = dequeue(ch.listeners);
adamc@670:           if (listener == null) {
adamc@670:             enqueue(ch.msgs, msg);
adamc@670:           } else {
adamc@670:             listener(msg);
adamc@670:           }
adamc@669:         }
adamc@669: 
adamc@673:         connect();
adamc@668:       }
adamc@667:       else {
adamc@679:         /*try {
adamc@672:           whine("Error querying remote server for messages! " + xhr.status);
adamc@679:         } catch (e) { }*/
adamc@667:       }
adamc@667:     }
adamc@667:   };
adamc@667: 
adamc@673:   onTimeout = function() {
adamc@673:     xhr.abort();
adamc@673:     connect();
adamc@673:   };
adamc@673: 
adamc@673:   connect();
adamc@667: }
adamc@670: 
adamc@670: function rv(chn, parse, k) {
adamc@682:   if (chn == null)
adamc@682:     return;
adamc@682: 
adamc@670:   if (chn < 0)
adamc@670:     whine("Out-of-bounds channel receive");
adamc@670: 
adamc@670:   var ch;
adamc@670: 
adamc@670:   if (chn >= channels.length || channels[chn] == null) {
adamc@670:     ch = newChannel();
adamc@670:     channels[chn] = ch;
adamc@670:   } else
adamc@670:     ch = channels[chn];
adamc@670: 
adamc@670:   var msg = dequeue(ch.msgs);
adamc@670:   if (msg == null) {
adamc@670:     enqueue(ch.listeners, function(msg) { k(parse(msg))(null); });
adamc@670:   } else {
adamc@670:     k(parse(msg))(null);
adamc@670:   }
adamc@670: }
adamc@670: 
adamc@679: function uf(s) {
adamc@679:  return escape(s).replace(new RegExp ("/", "g"), "%2F");
adamc@670: }
adamc@679: 
adamc@679: function uu(s) {
adamc@679:   return unescape(s).replace(new RegExp ("\\+", "g"), " ");
adamc@679: }