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annotate lib/js/urweb.js @ 668:b0c1a46b1f15

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First message send delivered, but not interpreted
author Adam Chlipala <adamc@hcoop.net>
date Sun, 22 Mar 2009 15:05:07 -0400
parents a93d5324f400
children f68eee90dbcf
rev   line source
adamc@580 1 function cons(v, ls) {
adamc@580 2 return { n : ls, v : v };
adamc@580 3 }
adamc@579 4 function callAll(ls) {
adamc@585 5 for (; ls; ls = ls.n)
adamc@579 6 ls.v();
adamc@579 7 }
adamc@574 8
adamc@580 9 function sc(v) {
adamc@580 10 return {v : v, h : null};
adamc@580 11 }
adamc@580 12 function sv(s, v) {
adamc@580 13 s.v = v;
adamc@580 14 callAll(s.h);
adamc@580 15 }
adamc@601 16 function sg(s) {
adamc@601 17 return s.v;
adamc@601 18 }
adamc@579 19
adamc@580 20 function ss(s) {
adamc@580 21 return s;
adamc@580 22 }
adamc@580 23 function sr(v) {
adamc@580 24 return {v : v, h : null};
adamc@580 25 }
adamc@580 26 function sb(x,y) {
adamc@580 27 var z = y(x.v);
adamc@580 28 var s = {v : z.v, h : null};
adamc@580 29
adamc@580 30 function reZ() {
adamc@580 31 z.h = cons(function() { s.v = z.v; callAll(s.h); }, z.h);
adamc@580 32 }
adamc@580 33
adamc@580 34 x.h = cons(function() { z = y(x.v); reZ(); s.v = z.v; callAll(s.h); }, x.h);
adamc@580 35 reZ();
adamc@580 36
adamc@580 37 return s;
adamc@580 38 }
adamc@571 39
adamc@604 40 function lastParent() {
adamc@604 41 var pos = document;
adamc@604 42
adamc@600 43 while (pos.lastChild && pos.lastChild.nodeType == 1)
adamc@600 44 pos = pos.lastChild;
adamc@600 45
adamc@600 46 return pos.parentNode;
adamc@600 47 }
adamc@600 48
adamc@604 49 var thisScript = null;
adamc@603 50
adamc@604 51 function addNode(node) {
adamc@604 52 if (thisScript) {
adamc@604 53 thisScript.parentNode.appendChild(node);
adamc@604 54 thisScript.parentNode.removeChild(thisScript);
adamc@604 55 } else
adamc@604 56 lastParent().appendChild(node);
adamc@603 57 }
adamc@603 58
adamc@604 59 function runScripts(node) {
adamc@604 60 var savedScript = thisScript;
adamc@603 61
adamc@646 62 var scripts = node.getElementsByTagName("script"), scriptsCopy = {};
adamc@604 63 var len = scripts.length;
adamc@646 64 for (var i = 0; i < len; ++i)
adamc@646 65 scriptsCopy[i] = scripts[i];
adamc@604 66 for (var i = 0; i < len; ++i) {
adamc@646 67 thisScript = scriptsCopy[i];
adamc@604 68 eval(thisScript.textContent);
adamc@604 69 }
adamc@604 70
adamc@604 71 thisScript = savedScript;
adamc@603 72 }
adamc@603 73
adamc@603 74 function populate(node, html) {
adamc@603 75 node.innerHTML = html;
adamc@604 76 runScripts(node);
adamc@603 77 }
adamc@603 78
adamc@571 79 function dyn(s) {
adamc@571 80 var x = document.createElement("span");
adamc@604 81 populate(x, s.v);
adamc@604 82 addNode(x);
adamc@603 83 s.h = cons(function() { populate(x, s.v) }, s.h);
adamc@571 84 }
adamc@582 85
adamc@598 86 function inp(t, s) {
adamc@598 87 var x = document.createElement(t);
adamc@598 88 x.value = s.v;
adamc@604 89 addNode(x);
adamc@598 90 s.h = cons(function() { x.value = s.v }, s.h);
adamc@598 91 x.onkeyup = function() { sv(s, x.value) };
adamc@606 92 return x;
adamc@598 93 }
adamc@598 94
adamc@597 95 function eh(x) {
adamc@597 96 return x.split("&").join("&amp;").split("<").join("&lt;").split(">").join("&gt;");
adamc@597 97 }
adamc@597 98
adamc@582 99 function ts(x) { return x.toString() }
adamc@586 100 function bs(b) { return (b ? "True" : "False") }
adamc@586 101
adamc@649 102 function pi(s) {
adamc@649 103 var r = parseInt(s);
adamc@649 104 if (r.toString() == s)
adamc@649 105 return r;
adamc@649 106 else
adamc@649 107 throw "Can't parse int: " + s;
adamc@649 108 }
adamc@649 109
adamc@649 110 function pfl(s) {
adamc@649 111 var r = parseFloat(s);
adamc@649 112 if (r.toString() == s)
adamc@649 113 return r;
adamc@649 114 else
adamc@649 115 throw "Can't parse float: " + s;
adamc@649 116 }
adamc@649 117
adamc@649 118 function pf() {
adamc@649 119 alert("Pattern match failure");
adamc@649 120 throw "Pattern match failure";
adamc@649 121 }
adamc@589 122
adamc@603 123 var closures = [];
adamc@603 124
adamc@603 125 function ca(f) {
adamc@603 126 var n = closures.length;
adamc@603 127 closures[n] = f;
adamc@603 128 return n;
adamc@603 129 }
adamc@603 130
adamc@603 131 function cr(n) {
adamc@603 132 return closures[n]();
adamc@603 133 }
adamc@603 134
adamc@609 135
adamc@668 136 var client_id = 0;
adamc@668 137 var client_pass = 0;
adamc@668 138 var url_prefix = "/";
adamc@668 139
adamc@668 140 function getXHR(uri)
adamc@609 141 {
adamc@609 142 try {
adamc@609 143 return new XMLHttpRequest();
adamc@609 144 } catch (e) {
adamc@609 145 try {
adamc@609 146 return new ActiveXObject("Msxml2.XMLHTTP");
adamc@609 147 } catch (e) {
adamc@609 148 try {
adamc@609 149 return new ActiveXObject("Microsoft.XMLHTTP");
adamc@609 150 } catch (e) {
adamc@609 151 throw "Your browser doesn't seem to support AJAX.";
adamc@609 152 }
adamc@609 153 }
adamc@609 154 }
adamc@609 155 }
adamc@609 156
adamc@668 157 function requestUri(xhr, uri) {
adamc@668 158 xhr.open("GET", uri, true);
adamc@668 159
adamc@668 160 if (client_id != 0) {
adamc@668 161 xhr.setRequestHeader("UrWeb-Client", client_id.toString());
adamc@668 162 xhr.setRequestHeader("UrWeb-Pass", client_pass.toString());
adamc@668 163 }
adamc@668 164
adamc@668 165 xhr.send(null);
adamc@668 166 }
adamc@668 167
adamc@613 168 function rc(uri, parse, k) {
adamc@609 169 var xhr = getXHR();
adamc@609 170
adamc@609 171 xhr.onreadystatechange = function() {
adamc@612 172 if (xhr.readyState == 4) {
adamc@612 173 var isok = false;
adamc@612 174
adamc@612 175 try {
adamc@612 176 if (xhr.status == 200)
adamc@612 177 isok = true;
adamc@612 178 } catch (e) { }
adamc@612 179
adamc@612 180 if (isok)
adamc@613 181 k(parse(xhr.responseText));
adamc@649 182 else {
adamc@612 183 alert("Error querying remote server!");
adamc@649 184 throw "Error querying remote server!";
adamc@649 185 }
adamc@612 186 }
adamc@609 187 };
adamc@609 188
adamc@668 189 requestUri(xhr, uri);
adamc@609 190 }
adamc@667 191
adamc@667 192
adamc@667 193 function path_join(s1, s2) {
adamc@667 194 if (s1.length > 0 && s1[s1.length-1] == '/')
adamc@667 195 return s1 + s2;
adamc@667 196 else
adamc@667 197 return s1 + "/" + s2;
adamc@667 198 }
adamc@667 199
adamc@667 200 function listener() {
adamc@668 201 var uri = path_join(url_prefix, ".msgs");
adamc@667 202 var xhr = getXHR();
adamc@667 203
adamc@667 204 xhr.onreadystatechange = function() {
adamc@667 205 if (xhr.readyState == 4) {
adamc@667 206 var isok = false;
adamc@667 207
adamc@667 208 try {
adamc@667 209 if (xhr.status == 200)
adamc@667 210 isok = true;
adamc@667 211 } catch (e) { }
adamc@667 212
adamc@668 213 if (isok) {
adamc@667 214 alert("Messages: " + xhr.responseText);
adamc@668 215 requestUri(xhr, uri);
adamc@668 216 }
adamc@667 217 else {
adamc@667 218 alert("Error querying remote server for messages!");
adamc@667 219 throw "Error querying remote server for messages!";
adamc@667 220 }
adamc@667 221 }
adamc@667 222 };
adamc@667 223
adamc@668 224 requestUri(xhr, uri);
adamc@667 225 }