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annotate lib/js/urweb.js @ 604:20c083327364

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Add dynamic content under proper parents
author Adam Chlipala <adamc@hcoop.net>
date Sat, 17 Jan 2009 09:47:30 -0500
parents b1064de2b1f9
children 5145181b02fa
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@604 62 var scripts = node.getElementsByTagName("script");
adamc@604 63 var len = scripts.length;
adamc@604 64 for (var i = 0; i < len; ++i) {
adamc@604 65 thisScript = scripts[i];
adamc@604 66 eval(thisScript.textContent);
adamc@604 67 }
adamc@604 68
adamc@604 69 thisScript = savedScript;
adamc@603 70 }
adamc@603 71
adamc@603 72 function populate(node, html) {
adamc@603 73 node.innerHTML = html;
adamc@604 74 runScripts(node);
adamc@603 75 }
adamc@603 76
adamc@571 77 function dyn(s) {
adamc@571 78 var x = document.createElement("span");
adamc@604 79 populate(x, s.v);
adamc@604 80 addNode(x);
adamc@603 81 s.h = cons(function() { populate(x, s.v) }, s.h);
adamc@571 82 }
adamc@582 83
adamc@598 84 function inp(t, s) {
adamc@598 85 var x = document.createElement(t);
adamc@598 86 x.value = s.v;
adamc@604 87 addNode(x);
adamc@598 88 s.h = cons(function() { x.value = s.v }, s.h);
adamc@598 89 x.onkeyup = function() { sv(s, x.value) };
adamc@598 90 }
adamc@598 91
adamc@597 92 function eh(x) {
adamc@597 93 return x.split("&").join("&amp;").split("<").join("&lt;").split(">").join("&gt;");
adamc@597 94 }
adamc@597 95
adamc@582 96 function ts(x) { return x.toString() }
adamc@586 97 function bs(b) { return (b ? "True" : "False") }
adamc@586 98
adamc@584 99 function pf() { alert("Pattern match failure") }
adamc@589 100
adamc@603 101 var closures = [];
adamc@603 102
adamc@603 103 function ca(f) {
adamc@603 104 var n = closures.length;
adamc@603 105 closures[n] = f;
adamc@603 106 return n;
adamc@603 107 }
adamc@603 108
adamc@603 109 function cr(n) {
adamc@603 110 return closures[n]();
adamc@603 111 }
adamc@603 112