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<!DOCTYPE html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<title>SqueakJS</title>
<link rel="icon" type="image/png" href="squeakjs.png">
<link rel="stylesheet" href="../lib/gh-fork-ribbon.css">
<link rel="stylesheet" href="squeakjs.css">
<script type="module" src="../squeak.js"></script>
<script>
function runSqueak(imageName) {
// Squeak.debugFiles = true;
sqText.style.display = "none";
sqCanvas.style.display = "block";
SqueakJS.runSqueak(imageName, sqCanvas,{
spinner: sqSpinner,
appName: imageName && imageName.replace(/.*\//, "").replace(/\.image$/, ""),
onStart: function(vm, display, options) {
// debugger
// vm.breakOn("FileDirectory class>>activeDirectoryClass");
// vm.breakOnMessageNotUnderstood = true;
},
onQuit: function(vm, display, options) {
display.showBanner(SqueakJS.appName + " stopped.");
setTimeout(function() {
location.hash = ""; // show index page
location.href = location.href.replace(/\?.*/, "");
}, 0);
},
});
}
function importItems(items) {
var entries = [];
for (var i = 0; i < items.length; i++) {
var item = items[i];
if (item.kind === "file") {
entries.push(item.webkitGetAsEntry());
}
}
importEntriesRecursively(entries, []);
}
function importEntriesRecursively(entries, todo) {
var imageName = null;
entries.forEach(function(entry) {
if (entry.isFile) {
var path = entry.fullPath;
entry.file(function(file) {
var reader = new FileReader();
reader.onload = function () {
var buffer = this.result;
console.log("Storing " + path + " (" + buffer.byteLength + " bytes)");
if (/.*image$/.test(path)) imageName = path;
todo.push(path);
Squeak.filePut(path, buffer, function success() {
var index = todo.indexOf(path);
todo.splice(index, 1);
if (todo.length > 0) return;
afterImport(imageName);
});
}
reader.onerror = function() {
alert("Failed to read " + path);
drop.style.borderColor = "";
}
reader.readAsArrayBuffer(file);
});
} else if (entry.isDirectory) {
Squeak.dirCreate(entry.fullPath, true);
var reader = entry.createReader();
reader.readEntries(function(entries) {
importEntriesRecursively(entries, todo);
});
}
});
}
function importFiles(files) {
files = [].slice.call(files);
var todo = files.length,
imageName = null;
files.forEach(function(f) {
var reader = new FileReader();
reader.onload = function () {
var buffer = this.result;
console.log("Storing " + f.name + " (" + buffer.byteLength + " bytes)");
if (/.*image$/.test(f.name)) imageName = f.name;
Squeak.filePut(f.name, buffer, function success() {
if (--todo > 0) return;
afterImport(imageName);
});
}
reader.onerror = function() {
alert("Failed to read " + f.name);
drop.style.borderColor = "";
}
reader.readAsArrayBuffer(f);
});
}
function afterImport(imageName) {
setTimeout(() => drop.style.borderColor = "", 500);
if (!imageName) showFiles();
else {
const hash = '#' + paramsForImage(imageName);
if (location.hash !== hash) history.pushState({}, "", hash);
runSqueak(imageName);
}
}
function exportFile(a) {
var path = Squeak.splitFilePath(a.innerText);
Squeak.fileGet(path.fullname, function(buffer) {
var blob = new Blob([buffer], {type: 'application/octet-stream'});
FileSaver_saveAs(blob, path.basename, true);
}, alert);
return false;
}
function paramsForImage(imageName) {
var params = new URLSearchParams(location.hash.slice(1));
params.set("image", imageName);
return params.toString();
}
function showFiles() {
var imgList = [],
fileList = [],
dirs = [''],
nFiles = 0,
nDirs = 0,
nBytes = 0;
while (dirs.length > 0) {
var dir = dirs.pop(),
entries = Squeak.dirList(dir);
for (var f in entries) {
var entry = entries[f],
path = dir + '/' + f;
if (!entry[3] && f.match(/\.image$/))
imgList.push('<li><a href="#' + paramsForImage(path) + '">' + path + '</a> (' + (entry[4]/1000000).toFixed(1) + ' MB)</li>');
if (entry[3]) {
dirs.push(path);
nDirs++;
} else {
nFiles++;
nBytes += entry[4];
fileList.push('<li><a href="squeak:' + path + '" onclick="return exportFile(this)" target="_blank">' + path + '</a>' +
(entry[4] >= 100000 ? ' (' + (entry[4]/1000000).toFixed(1) + ' MB)'
: ' (' + (entry[4]/1000).toFixed(1) + ' KB)') + '</li>');
}
};
}
function fdir(s) { return s.replace(/<[^>]*>/gi,'').replace(/[^\/]*$/, ''); }
function fsort(a, b) { return fdir(a).localeCompare(fdir(b)) || a.localeCompare(b); }
if (fileList.length) {
files.innerHTML = "<ul>" + fileList.sort(fsort).join("") + "</ul>";
filestats.innerHTML = nFiles + " files in " + nDirs + " directories, " +
(nBytes/1000000).toFixed(1) + " MBytes total";
}
if (imgList.length) images.innerHTML = "<p>Select a local image to run:</p><ul>" + imgList.sort(fsort).join("") + "</ul>";
else images.innerHTML = "<ul>[Once you have dropped local images to this page they will be listed here.]</ul>"
}
window.onhashchange = function() {
window.location.reload();
}
window.onload = function() {
// if we have an image or zip in hash then we run Squeak with the options provided in the url
if ((location.hash || location.search).match(/(\.image(\W|$)|\Wzip=)/)) {
return runSqueak();
}
// otherwise, we generate the text to display
var links = document.getElementsByTagName("a");
for (var i = 0; i < links.length; i++) {
var link = links[i],
href = link.getAttribute("href");
if (href[0] === "#") {
link.innerHTML = href;
link.onclick = (function(href) {
return function onclick() { window.location = href; }
})(href);
}
}
// show stored files and images. Update after fsck (which takes a while)
showFiles();
setTimeout(function() {
Squeak.fsck(function(stats) { if (stats.deleted) showFiles(); });
}, 0);
// also, enable drag-and-drop even if no image loaded yet
// (squeak.js will replace these when an image is running)
document.body.ondragover = function(evt) {
evt.preventDefault();
};
document.body.ondragenter = function(evt) {
drop.style.borderColor = "#0E0";
evt.dataTransfer.dropEffect = "copy";
};
document.body.ondragleave = function(evt) {
drop.style.borderColor = "";
};
document.body.ondrop = function(evt) {
evt.preventDefault();
drop.style.borderColor = "#080";
importItems(evt.dataTransfer.items);
return false;
};
fileInput.onchange = function(evt) {
drop.style.borderColor = "#0F0";
importFiles(evt.target.files);
};
}
</script>
</head>
<body>
<div id="sqText">
<h1><img id="logo" src="squeakjs.png">SqueakJS</h1>
<div class="github-fork-ribbon-wrapper right">
<div class="github-fork-ribbon">
<a href="https://github.com/codefrau/SqueakJS" target="_blank">Fork me on GitHub</a>
</div>
</div>
SqueakJS is an HTML5 runtime engine for <a href="http://squeak.org/" target="_blank">Squeak</a> Smalltalk written in pure JavaScript by Vanessa Freudenberg.
See the <a href="../" target="_blank">SqueakJS Project</a> page for more information.
<h2>Run Squeak images from your local machine</h2>
Use drag-and-drop to run a Squeak image from your machine: drop the image (perhaps together with a changes and sources file) into this page.
<div id="images"></div>
All images and related files are stored persistently in a database inside your browser.
The box below shows the files that are currently in your database. Inside Squeak, you can use a FileList
to manage them.
<div id="drop">Drop Squeak images and other files here, or <input id="fileInput" type="file" multiple>
<div id="files" class="filelist"></div>
<div id="filestats"></div>
</div>
Clicking on a name in the box will export that file to your browser's downloads folder.
<h2>Run Squeak images from the internet</h2>
Construct a URL linking to this page and pass the image and options.
<em>Beware that the server needs to allow script access via <a href="http://enable-cors.org/server.html" target="_blank">CORS</a>.</em>
<br>Here are a few examples:
<ul>
<li>Squeak 1.13 (1996) <a href="#url=https://freudenbergs.de/vanessa/squeakjs&files=[Squeak1.13u.image,Squeak1.13u.changes,SqueakV1.sources]&swapButtons=true">link</a></li>
<li>Squeak 2.8 (2000) <a href="#url=https://freudenbergs.de/vanessa/squeakjs&files=[Squeak2.8.image,Squeak2.8.changes,SqueakV2.sources]&swapButtons=true">link</a></li>
<li>Squeak 3.8 (2006) <a href="#url=https://freudenbergs.de/vanessa/squeakjs&files=[Squeak3.8.1-6747full.image,Squeak3.8.1-6747full.changes,SqueakV3.sources]&swapButtons=true">link</a></li>
<li>Squeak 3.9 (2008) <a href="#url=https://freudenbergs.de/vanessa/squeakjs&files=[Squeak3.9.1-final-7075.image,Squeak3.9.1-final-7075.changes,SqueakV39.sources]&swapButtons=true">link</a></li>
<li>Pharo 1.0 (2010) <a href="#unix&zip=[https://files.pharo.org/image/10/latest.zip,https://files.pharo.org/sources/PharoV10.sources.zip]">link</a></li>
<li>Squeak 4.5 (2014) <a href="#url=https://freudenbergs.de/vanessa/squeakjs&files=[Squeak4.5-13680.image,Squeak4.5-13680.changes,SqueakV41.sources]">link</a></li>
<li>Squeak 5.0 (2015) <a href="#url=https://freudenbergs.de/vanessa/squeakjs&zip=[Squeak5.0-15113.zip,SqueakV50.sources.zip]">link</a></li>
<li>SpeechPlugin Demo (2016) <a href="#zip=https://www.hpi.uni-potsdam.de/hirschfeld/artefacts/squeakjs/SpeechPluginDemo.zip">link</a></li>
<li>Squeak 6.0 64 bit (2022) <a href="#zip=https://files.squeak.org/6.0/Squeak6.0-22104-64bit/Squeak6.0-22104-64bit.zip&wizard=false">link</a></li>
<li>Cuis 6.2 (2023) <a href="#highdpi&url=https://cdn.jsdelivr.net/gh/Cuis-Smalltalk/Cuis6-2@6f984e8c/CuisImage&files=[32BitImages/Cuis6.2-32.image,32BitImages/Cuis6.2-32.changes,Cuis6.2.sources]">link</a></li>
<li>Squeak Trunk 6.1α (2024) <a href="#zip=https://files.squeak.org/6.1alpha/Squeak6.1alpha-22998-32bit/Squeak6.1alpha-22998-32bit.zip&wizard=false">link</a></li>
<li>Squeak Trunk 6.1α (hi-res: save image after first load for faster startup) <a href="#highdpi&zip=https://files.squeak.org/6.1alpha/Squeak6.1alpha-22998-32bit/Squeak6.1alpha-22998-32bit.zip&wizard=false">link</a></li>
</ul>
On the first run these will be stored locally. Subsequent starts are much faster since there is no download.
<h2>Run SqueakJS apps</h2>
SqueakJS can be used to run Squeak apps. Here are some examples.
Note how they differ when you resize the browser window—Etoys is scaled,
whereas Scratch is resized.
The apps are configured to use template files (e.g. example projects and artwork)
that are loaded from a server on demand.
<ul>
<li><a href="../etoys/" target="_blank">Etoys</a></li>
<li><a href="../scratch/" target="_blank">Scratch</a></li>
<li>demo of the <a href="../demo/simple.html#document=JSBridge.st" target="_blank">JavaScript bridge</a> (not really an app)</li>
<li><a href="https://codefrau.github.io/jasmine/" target="_blank">Croquet Jasmine</a> (2004)</li>
</ul>
On some mobile devices you can save these apps to the home screen, and run them like a real app.
<h2>Use SqueakJS on your own website</h2>
Instead of passing options by URL to this page, you can
<a href="https://github.com/codefrau/SqueakJS">download SqueakJS</a>
from GitHub and use it on your own website like this:
<pre>
<html>
<head>
<script src="squeak.js"></script>
<script>
window.onload = function() {
SqueakJS.runSqueak("my.image", sqCanvas, { /*put options here*/ });
}
</script>
</head>
<body>
<canvas id="sqCanvas"></canvas>
</body>
</html>
</pre>
Options include display resolution, template file URLs, etc.
For example usage take a look at the demo pages included in the GitHub repo:
<a href="../etoys/" target="_blank">Etoys</a>
(<a href="https://github.com/codefrau/SqueakJS/tree/master/etoys" target="_blank">source</a>) or
<a href="../scratch/" target="_blank">Scratch</a>
(<a href="https://github.com/codefrau/SqueakJS/tree/master/scratch" target="_blank">source</a>)
<h2>Modify SqueakJS</h2>
I am developing SqueakJS using “Lively”, a browser-based development environment for JavaScript inspired by Smalltalk.
Instead of having to constantly reload the page after every source code change,
I am executing Squeak in my <a href= "https://smalltalkzoo.thechm.org/HOPL-Squeak.html">Lively SqueakJS Debugger</a>
and can change its code while it is running.
That's why the SqueakJS source code has a somewhat unusual layout, it fits the Lively way of developing.
You can still use a plain text editor if you feel that's simpler.
<h2>Contribute to SqueakJS</h2>
SqueakJS is free software (MIT license).
You're very welcome to <a href="http://lists.squeakfoundation.org/mailman/listinfo/vm-dev">discuss</a>,
<a href="https://github.com/codefrau/SqueakJS/issues">report bugs</a>,
and <a href="https://github.com/codefrau/SqueakJS/">contribute code</a>.
<p>Have fun! — Vanessa Freudenberg</p>
</div>
<canvas id="sqCanvas"></canvas>
<div id="sqSpinner"><div></div></div>
</body>
</html>
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