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workshop.php
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workshop.php
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<?php
function con() {
mysql_connect() or die('Could not connect: '.mysql_error);
mysql_select_db('sloisel_numeric') or die('Could not select db: ' . mysql_error());
}
con();
if(isset($_POST['savedata'])) {
$data = $_POST['savedata'];
if (get_magic_quotes_gpc())
$data = stripslashes($data);
json_decode($data) or die("json error");
$f = hash('sha256',$data);
if($f === "") { exit; }
$d = mysql_real_escape_string($data);
$q = "insert ignore into blobs value ('$f','$d')";
$result = mysql_query($q) or die('Could not save script: ' . mysql_error());
header('Location: workshop.php?link=' . $_GET['link']);
exit;
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="description" content="Numerical analysis in javascript: library and console." />
<meta name="keywords" content="Javascript,HTML,simplex,matrix,vector,linear algebra" />
<meta name="author" content="Sébastien Loisel" />
<link rel="SHORTCUT ICON" href="favicon.ico">
<!--[if IE]>
<link rel="stylesheet" type="text/css" href="resources/style-ie.css">
<![endif]-->
<!--[if !IE]><!-->
<link rel="stylesheet" type="text/css" href="resources/style.css">
<!--<![endif]-->
<title>Numeric Javascript: Workshop</title>
<!--[if lte IE 9]>
<script language="javascript" type="text/javascript" src="tools/excanvas.min.js"></script>
<![endif]-->
<script src="tools/megalib.js"></script>
<body onload="workshop.restore2();">
<?php include "resources/header.html" ?>
<form name="myform" action="workshop.php" method="post">
<table cellspacing=20px cellpadding=0>
<tr><td>
<ul class="nav">
<li class="nav"><a id = "NEW" class="nav" href="#" onclick="workshop.reset();">START OVER</a></li>
<li class="nav"><a href="javascript: workshop.submit();" class="nav" id="permalink">MAKE PERMALINK</a>
</ul>
</td>
<td style="margin:10px; font-size:12px;" id="divupdate">
</td>
</tr>
</table>
<input type="hidden" name="savedata" value="">
</form>
<div class="interactions">
<div class="inner" id = "output_0">
<div class="out"></div>
<div class="output"></div>
<div class="button2"><a href="#" onclick="workshop.mkdiv(0);" class="button">↩</a></div>
</div>
</div>
<script>
"use strict";
var _indexOf;
if(typeof Array.indexOf === "undefined") {
_indexOf = function(t,obj){
for(var i=0; i<t.length; i++){
if(t[i]==obj){
return i;
}
}
return -1;
}
} else _indexOf = function(t,obj) { return t.indexOf(obj); }
var _retarded = false;
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ _retarded = true; }
if(_retarded) {
_queue = [];
_onmessage = function(ev) { _queue.push(ev); }
_loaded = 0;
window.Worker = function(f) {
var worker = this;
worker.queue = [];
worker.onmessage = function(ev) {};
worker.postMessage = function(ev) { _onmessage({data: ev}); };
var scr = document.createElement('script');
scr.src = f;
scr.type = 'text/javascript';
scr.onreadystatechange = function () {
var k;
if (scr.readyState == 'loaded' || scr.readyState == 'complete') {
for(k=0;k<_queue.length;k++) { _onmessage(_queue[k]); }
}
}
document.getElementsByTagName('head')[0].appendChild(scr);
workerPostMessage = function(ev) { worker.onmessage({data: ev}); }
}
importScripts = function(z) {
var scr = document.createElement('script');
scr.src = z;
scr.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(scr);
};
}
var workshop = (function () {
function resize(input) {
if(input.scrollHeight > input.clientHeight) {
input.style.height = (input.scrollHeight+10)+"px";
}
}
function elementPos(e){
var x = 0, y = 0, dx = e.offsetWidth, dy = e.offsetHeight;
while(e !== null){
x += e.offsetLeft;
y += e.offsetTop;
e = e.offsetParent;
}
return {x:x, y:y, dx:dx, dy:dy};
}
function checkpos(e) {
var foo = elementPos(e);
var y = window.pageYOffset, dy = window.innerHeight;
if(foo.y < y+10 || foo.y+foo.dy > y+dy-10) {
window.scrollTo(window.pageXOffset,Math.max(0,Math.round(foo.y-0.5*dy)));
}
}
function myfocus(e) {
checkpos(e);
e.focus();
}
var savedata;
var cache = [];
var count = 0;
var clear = [];
var divcount = 0;
var divorder = [0];
var w = new Worker('myworker.js');
var plotcount = 0;
function plotit(plotid,x) {
var k;
try {
if(typeof x.s === "object") $('#'+plotid).css(x.s);
$.plot($("#"+plotid), x.p, x.o);
} catch(e) {
var _foo = e.toString();
if(typeof e.stack !== "undefined" && typeof e.stack.toString !== "undefined") {
_foo += "\n\n"+e.stack.toString();
}
_foo = _foo.replace(/&/g,'&').replace(/>/g,'>').replace(/</g,'<').replace(/"/g,'"');
$('#'+plotid).after(_foo);
$('#'+plotid).remove();
}
}
var savereq = false;
function saveit() {
if(!savereq) {
savereq = true;
setTimeout(function () {
savereq = false;
localStorage.savedata = JSON.stringify(savedata);
},1000);
}
}
function outputChanged(k,o) {
var i = _indexOf(divorder,k);
savedata.outputs[i].push(o);
saveit();
}
w.onmessage = function(ev) {
var x = JSON.parse(ev.data);
var y = $('#out_'+x.k.toString())[0];
if(clear[x.k]) { y.innerHTML = ''; savedata.outputs[_indexOf(divorder,x.k)] = []; }
if(typeof x.p !== "undefined") {
var plotid = "plot_"+plotcount.toString();
plotcount++;
y.innerHTML += '<div class="plot" id="'+plotid+'"></div>';
(function () {
setTimeout(function () {
plotit(plotid,x);
setTimeout(function () {
outputChanged(x.k,x);
},0);
},0);
}());
clear[x.k] = false;
return;
}
else {
y.innerHTML += x.o;
(function () {
setTimeout(function() {
outputChanged(x.k,x.o); },0)
}());
clear[x.k] = false;
}
}
function mkdiv(i) {
divcount++;
var foo = _indexOf(divorder,i);
divorder.splice(foo+1,0,divcount);
savedata.inputs.splice(foo+1,0,'');
savedata.outputs.splice(foo+1,0,[]);
$('#output_'+i.toString()).after(
'<div class="inner" id = "input_'+divcount.toString()+'">'+
'<div class="caret">IN></div>'+
'<div class="input"><textarea rows=1 id = "text_'+divcount.toString()+'" class="input" onkeydown="workshop.mykeydown(event,'+divcount.toString()+');"></textarea></div>'+
'<div class="button"><a href="#" onclick="workshop.rmdiv('+divcount.toString()+')" class="button">✖</a></div>'+
'</div>'+
'<div class="inner" id = "output_'+divcount.toString()+'">'+
'<div class="out">OUT></div>'+
'<div id = "out_'+divcount.toString()+'" class="output"></div>'+
'<div class="button2"><a href="#" onclick="workshop.mkdiv('+divcount.toString()+');" class="button">↩</a></div>'+
'</div>'
);
}
function rmdiv(i) {
var foo = _indexOf(divorder,i);
divorder.splice(foo,1);
$('#input_'+i.toString()).remove();
$('#output_'+i.toString()).remove();
savedata.inputs.splice(foo,1);
savedata.outputs.splice(foo,1);
}
function go(k) {
var input = $('#text_'+k.toString())[0];
var n = _indexOf(divorder,k);
var foo = divorder[n+1];
if(typeof foo === "number") {
myfocus($('#text_'+foo.toString())[0]);
} else {
mkdiv(k);
foo = divorder[n+1];
}
input.className = "runned";
cache[k] = input.value;
myfocus($('#text_'+foo.toString())[0]);
clear[k] = true;
$('#out_'+k.toString())[0].innerHTML = "<img src=\"resources/wait16.gif\">";
var runit = function() { w.postMessage(JSON.stringify({k:k,n:n,e:input.value})); }
setTimeout(runit,0);
}
function inputChanged(k){
var i = _indexOf(divorder,k);
var input = $('#text_'+k.toString())[0];
if(input.value === cache[k]) input.className = "runned";
else { input.className = "input"; cache[k] = null; }
savedata.inputs[i] = input.value;
saveit();
}
var _foo;
var rc = 0;
function restore2(foo) {
if(foo) _foo = foo;
rc++;
if(rc<2) return;
foo = _foo;
savedata = { inputs: [], outputs: [], scripts: foo.scripts };
var baz = 'Version: <tt>'+foo.scripts[0]+'</tt>';
if(_indexOf(foo.scripts,workshop.updateVersion)<0) {
baz = baz + ' (Update to <tt><a href="javascript: workshop.update();">'+workshop.updateVersion+'</a></tt>)';
}
$('#divupdate')[0].innerHTML = baz;
if(foo.inputs.length === 0) { mkdiv(0); return; }
var input,output,i,j,f0;
for(i=1;i<foo.inputs.length;i++) {
mkdiv(i-1);
input = $('#text_'+i.toString())[0];
input.value = foo.inputs[i];
f0 = (function(in0) { return function() { resize(in0); }; }(input));
setTimeout(f0,0);
output = $('#out_'+i.toString())[0];
if(typeof foo.outputs[i] === "undefined") { continue; }
for(j=0;j<foo.outputs[i].length;j++) {
if(typeof foo.outputs[i][j] === "string") {
output.innerHTML += foo.outputs[i][j];
} else {
(function(i,j) {
var plotid = "plot_"+plotcount.toString();
plotcount++;
output.innerHTML += '<div class="plot" id="'+plotid+'"></div>';
setTimeout(function () {
plotit(plotid,{k:i, o:foo.outputs[i][j].o, p:foo.outputs[i][j].p});
},0);
}(i,j));
}
}
}
savedata = foo;
workshop.savedata = savedata;
}
function restore(savedata) {
w.postMessage(JSON.stringify({imports:savedata.scripts}));
restore2(savedata);
}
function preload(savedata) {
var k;
var client;
for(k=0;k<savedata.scripts.length;k++) {
client = new XMLHttpRequest();
client.open("GET", savedata.scripts[k]);
client.send();
}
}
function mykeydown(e,i) {
var input = $('#text_'+i.toString())[0];
checkpos(input);
resize(input);
setTimeout(function () { resize(input); },0);
var e = window.event?window.event:e;
if(e.keyCode === 13 && e.shiftKey === false) {
setTimeout(function () { inputChanged(i); go(i); },0);
if(window.event) e.returnValue = false;
else e.preventDefault();
} else {
setTimeout(function () { inputChanged(i); },0)
};
}
function reset() {
localStorage.clear();
window.location.replace('workshop.php');
}
function update() {
savedata.scripts = [workshop.updateVersion];
localStorage.savedata = JSON.stringify(savedata);
window.location.replace('workshop.php');
}
function submit() {
var f = document.myform;
var foo = JSON.stringify(savedata);
var digest = Crypto.SHA256(foo, { asBytes: true });
var s = document.myform.savedata;
s.value = foo;
digest = Crypto.util.bytesToHex(digest);
f.action = "workshop.php?link="+digest;
f.submit();
}
return {
print:print,
mkdiv:mkdiv,
rmdiv:rmdiv,
mykeydown:mykeydown,
w:w,
savedata:savedata,
restore:restore,
restore2:restore2,
reset:reset,
resize:resize,
submit:submit,
update:update,
preload:preload
}
}());
</script>
<br><br><br>
<script>
<?php
$incs = NULL;
if(isset($_GET['link'])) {
$f = $_GET['link'];
if(!preg_match('/^[0-9a-fA-F]*$/',$f)) { exit; }
$q = "select v from blobs where k = '".$f."'";
$result = mysql_query($q) or die('Could not fetch script: ' . mysql_error());
$s = mysql_fetch_row($result) or die ('Could not fetch field: ' . mysql_error());
$restore = $s[0];
$foo = json_decode($restore,true) or die("json error");
$incs = $foo['scripts'];
if(is_null($incs)) {
$incs = array(1 => 'lib/numeric-1.1.7.js');
}
echo <<<EOT
workshop._restore = $restore;
EOT;
} else {
echo <<<EOT
workshop._restore = ((typeof localStorage.savedata === "string")?
(JSON.parse(localStorage.savedata)):
{inputs: [], outputs: [],
scripts: ["lib/numeric-1.1.7.js"] });
EOT;
}
?>
workshop.version = "1.1.7";
workshop.updateVersion = "lib/numeric-1.1.7.js";
workshop.preload(workshop._restore);
</script>
<script>
workshop.restore(workshop._restore);
</script>