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index.html
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<!doctype html>
<html>
<head>
<meta charset="UTF-8" />
<script src="https://cdn.jsdelivr.net/npm/jquery"></script>
<script src="https://cdn.jsdelivr.net/npm/jquery.terminal@2.35.2/js/jquery.terminal.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/jquery.terminal@2.35.2/js/unix_formatting.min.js"></script>
<script src="https://lib.imjoy.io/imjoy-loader.js"></script>
<script src="https://cdn.jsdelivr.net/npm/prismjs/prism.js"></script>
<script src="https://cdn.jsdelivr.net/npm/jquery.terminal/js/prism.js"></script>
<script src="https://unpkg.com/prismjs@1.29.0/components/prism-python.js"></script>
<link href="https://cdn.jsdelivr.net/npm/jquery.terminal@2.35.2/css/jquery.terminal.min.css" rel="stylesheet" />
<link href="https://cdn.jsdelivr.net/npm/prismjs/themes/prism.css" rel="stylesheet" />
<!-- add icon -->
<link rel="icon" href="https://imjoy.io//static/icons/favicon-32x32.png" />
<!-- add title -->
<title>web-python-console</title>
<style>
:root {
--size: 1.4;
--font: Consolas;
}
.terminal {
--size: 1.5;
--color: rgba(255, 255, 255, 0.8);
}
.noblink {
--animation: terminal-none;
}
body {
background-color: black;
}
#loading {
display: inline-block;
width: 50px;
height: 50px;
position: fixed;
top: 50%;
left: 50%;
border: 3px solid rgba(172, 237, 255, 0.5);
border-radius: 50%;
border-top-color: #fff;
animation: spin 1s ease-in-out infinite;
-webkit-animation: spin 1s ease-in-out infinite;
}
@keyframes spin {
to {
-webkit-transform: rotate(360deg);
}
}
@-webkit-keyframes spin {
to {
-webkit-transform: rotate(360deg);
}
}
#menu-container {
position: absolute;
top: 3px;
right: 3px;
z-index: 100;
}
.window {
z-index: 101 !important;
min-height: 220px !important;
}
</style>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-ETFXPV2DFP"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'G-ETFXPV2DFP');
</script>
</head>
<body>
<div id="loading"></div>
<div id="menu-container"></div>
<div id="window-container" style="height:0px;"></div>
<script>
"use strict";
window.app = {};
function sleep(s) {
return new Promise((resolve) => setTimeout(resolve, s));
}
async function setupImJoyApp() {
const app = await loadImJoyBasicApp({
name: "web-python-console",
process_url_query: true,
show_window_title: false,
show_progress_bar: true,
show_empty_window: true,
menu_style: { position: "absolute", right: 0, top: "2px" },
window_style: {},
main_container: null,
menu_container: "menu-container",
window_manager_container: "window-container",
expose_api: true,
imjoy_api: {
async getConsole(caller, config) {
return createApi();
}
},
});
const imjoy_api = app.imjoy.api;
window.app.imjoy = imjoy_api;
const console = await createApi();
window.app.console = console;
// if you want to let users to load new plugins, add a menu item
app.addMenuItem({
label: "➕ Load Plugin",
callback() {
const uri = prompt(
`Please type a ImJoy plugin URL`,
"https://github.com/imjoy-team/imjoy-plugins/blob/master/repository/ImageAnnotator.imjoy.html"
);
if (uri) app.loadPlugin(uri);
},
});
app.addMenuItem({
label: "📝 Edit Code",
async callback() {
let plugin = null;
app.loadedPlugins.forEach((p) => {
if (p.config.name === "PyEditor") {
plugin = p;
}
});
if (!plugin) {
plugin = await app.loadPlugin(
"https://nanguage.github.io/web-python-console/python-editor.imjoy.html"
);
}
await app.runPlugin(plugin);
}
});
app.addMenuItem({
label: "📂 Mount Local Folder",
async callback() {
const mountPoint = prompt(
`Please type a mount point`,
"/mount_dir"
);
if (mountPoint) {
await mountNativeFs(mountPoint);
await imjoy_api.showMessage(`Mounted at ${mountPoint}`);
}
}
})
app.addMenuItem({
// restart
label: "🔄 Restart",
async callback() {
await restart();
},
})
return app;
}
async function restart() {
const body = $("body");
$(".terminal")[0].remove();
window.console_ready = initConsole(false);
await window.console_ready;
}
async function mountNativeFs(mountPoint = "/mount_dir") {
const pyodide = window.pyodide;
const dirHandle = await showDirectoryPicker();
if ((await dirHandle.queryPermission({ mode: "readwrite" })) !== "granted") {
if (
(await dirHandle.requestPermission({ mode: "readwrite" })) !== "granted"
) {
throw Error("Unable to read and write directory");
}
}
const nativefs = await pyodide.mountNativeFS(mountPoint, dirHandle);
}
async function createApi() {
function setup() {
console.log("web-python-console is ready.")
}
function echo(msg) {
const term = window.term;
term.echo(msg);
}
async function exec(code, show_code = true) {
const term = window.term;
code = code.replaceAll("\r\n", "\n");
await term.exec(code, !show_code);
}
function clear() {
const term = window.term;
term.clear();
}
async function getConsoleContent() {
const term = window.term;
const output = term.get_output();
return output;
}
function getVariable(name) {
const pyodide = window.pyodide;
const value = pyodide.globals.get(name);
const res = toImjoyObj(value);
return res;
}
function setVariable(name, value) {
const pyodide = window.pyodide;
const res = toPyObj(value);
pyodide.globals.set(name, res);
}
function mount_native_fs(mount_point = "/mount_dir") {
return mountNativeFs(mount_point);
}
async function consoleReady() {
await window.console_ready;
}
return {
_rintf: true,
setup: setup,
echo: echo,
exec: exec,
clear: clear,
restart: restart,
get_variable: getVariable,
set_variable: setVariable,
get_content: getConsoleContent,
mount_native_fs: mount_native_fs,
ready: consoleReady,
}
}
async function initImJoy() {
// start as an plugin
if (window.self !== window.top) {
const imjoyRPC = await loadImJoyRPC();
const imjoy_api = await imjoyRPC.setupRPC({ name: "web-python-console" });
window.app.imjoy = imjoy_api;
const console = await createApi();
window.app.console = console;
await imjoy_api.export(console)
} else {
// start as an standalone app
await setupImJoyApp();
}
}
function updateButtonLabel() {
$(".fa-home").map((_, el) => {
el.innerHTML = "Home";
});
$(".fa-arrow-left").map((_, el) => {
el.innerHTML = "Back";
});
$(".fa-arrow-right").map((_, el) => {
el.innerHTML = "Forward";
});
$(".fa-arrows").map((_, el) => {
el.innerHTML = "Pan";
});
$(".fa-search-plus").map((_, el) => {
el.innerHTML = "Zoom";
});
}
function toBool(value, default_value = false) {
if (value === undefined || value === null) return default_value;
if (typeof value === "boolean") return value;
if (typeof value === "number") return value !== 0;
if (typeof value === "string") {
switch (value.toLowerCase().trim()) {
case "true": case "yes": case "1": return true;
case "false": case "no": case "0": case null: return false;
default: return Boolean(value);
}
}
}
function toDigits(i, digits) {
return i.toString().padStart(digits, "0");
}
async function runFile(url, showCode = true) {
const term = window.term;
const response = await fetch(url);
let text = await response.text();
text = text.replaceAll("\r\n", "\n");
text = "\n" + text;
const p = term.exec(text, !showCode);
await p;
}
function toJs(value) {
if (value instanceof pyodide.ffi.PyProxy) {
if (value instanceof pyodide.ffi.PyDict) {
let map = value.toJs();
const obj = {};
for (const [key, value] of map) {
obj[key] = toJs(value);
}
return obj;
} else {
return value.toJs();
}
} else {
return value;
}
}
class ImjoyApiWrapper {
constructor(imjoy_api) {
this.imjoy_api = imjoy_api;
Object.assign(this, imjoy_api);
this.getWindow = this.getWindowOveride;
this.createWindow = this.createWindowOveride;
this.loadPlugin = this.loadPluginOveride;
this.getPlugin = this.getPluginOveride;
}
async getWindowOveride(config) {
const window = await this.imjoy_api.getWindow(config);
const windowWrapper = new PluginWrapper(window);
return windowWrapper;
}
async createWindowOveride(config) {
const window = await this.imjoy_api.createWindow(config);
const windowWrapper = new PluginWrapper(window);
return windowWrapper;
}
async loadPluginOveride(config) {
const plugin = await this.imjoy_api.loadPlugin(config);
const pluginWrapper = new PluginWrapper(plugin);
return pluginWrapper;
}
async getPluginOveride(config) {
const plugin = await this.imjoy_api.getPlugin(config);
const pluginWrapper = new PluginWrapper(plugin);
return pluginWrapper;
}
async restart() {
await restart();
}
async insertHtml(htmlSrc, width = "100%", height = "400px") {
const term = window.term;
const encoded = encodeURIComponent(htmlSrc);
const iframe = document.createElement("iframe");
iframe.src = 'data:text/html;charset=utf-8,' + encoded;
iframe.style.width = width;
iframe.style.height = height;
iframe.style.resize = 'both'
iframe.style.overflow = 'auto'
term.echo(iframe);
}
async mountNativeFs(mountPoint = "/mount_dir") {
await mountNativeFs(mountPoint);
}
async openEditor() {
const plugin = await this.imjoy_api.loadPlugin(
"https://nanguage.github.io/web-python-console/python-editor.imjoy.html"
);
await plugin.run();
}
}
function toImjoyObj(obj) {
const pyodide = window.pyodide;
const imjoy_encode = pyodide.globals.get("imjoy_encode");
const res = toJs(imjoy_encode(obj));
return res;
}
function toPyObj(obj) {
const pyodide = window.pyodide;
const imjoy_decode = pyodide.globals.get("imjoy_decode");
const res = imjoy_decode(pyodide.toPy(obj));
return res;
}
class PluginWrapper {
constructor(plugin) {
Object.keys(plugin).forEach(key => {
if (typeof plugin[key] === 'function') {
this[key] = (...args) => {
const processedArgs = args.map(arg => toImjoyObj(arg));
const res = plugin[key](...processedArgs);
if (res instanceof Promise) {
return res.then(r => toPyObj(r));
} else {
return toPyObj(res);
}
};
} else {
this[key] = plugin[key];
}
});
}
}
async function initConsole(initIj = true) {
let indexURL = "https://cdn.jsdelivr.net/pyodide/v0.24.1/full/";
const urlParams = new URLSearchParams(window.location.search);
const buildParam = urlParams.get("build");
if (buildParam) {
if (["full", "debug", "pyc"].includes(buildParam)) {
indexURL = indexURL.replace(
"/full/",
"/" + urlParams.get("build") + "/",
);
} else {
console.warn(
'Invalid URL parameter: build="' +
buildParam +
'". Using default "full".',
);
}
}
const { loadPyodide } = await import(indexURL + "pyodide.mjs");
// to facilitate debugging
globalThis.loadPyodide = loadPyodide;
let term;
globalThis.pyodide = await loadPyodide({
stdin: () => {
let result = prompt();
echo(result);
return result;
},
});
let namespace = pyodide.globals.get("dict")();
pyodide.runPython(
`
import sys
from pyodide.ffi import to_js
from pyodide.console import PyodideConsole, repr_shorten, BANNER
import __main__
BANNER = "Welcome to the Pyodide terminal emulator 🐍\\nSupport control through ImJoy API.\\nSee https://github.com/Nanguage/imjoy-web-python-console for detail.\\n" + BANNER
pyconsole = PyodideConsole(__main__.__dict__)
import builtins
async def await_fut(fut):
res = await fut
if res is not None:
builtins._ = res
return to_js([res], depth=1)
def clear_console():
pyconsole.buffer = []
`,
{ globals: namespace },
);
let repr_shorten = namespace.get("repr_shorten");
let banner = namespace.get("BANNER");
let await_fut = namespace.get("await_fut");
let pyconsole = namespace.get("pyconsole");
let clear_console = namespace.get("clear_console");
const echo = (msg, ...opts) =>
term.echo(
msg
.replaceAll("]]", "]]")
.replaceAll("[[", "[["),
...opts,
);
namespace.destroy();
let ps1 = ">>> ",
ps2 = "... ";
async function lock() {
let resolve;
let ready = term.ready;
term.ready = new Promise((res) => (resolve = res));
await ready;
return resolve;
}
async function interpreter(command) {
let unlock = await lock();
term.pause();
// multiline should be split (useful when pasting)
let counter = 0;
const lines = command.split("\n");
for (const c of lines) {
counter++;
const escaped = c.replaceAll(/\u00a0/g, " ");
let fut = pyconsole.push(escaped);
term.set_prompt(fut.syntax_check === "incomplete" ? ps2 : ps1);
switch (fut.syntax_check) {
case "syntax-error":
term.error(fut.formatted_error.trimEnd());
continue;
case "incomplete":
continue;
case "complete":
break;
default:
throw new Error(`Unexpected type ${ty}`);
}
// In JavaScript, await automatically also awaits any results of
// awaits, so if an async function returns a future, it will await
// the inner future too. This is not what we want so we
// temporarily put it into a list to protect it.
let wrapped = await_fut(fut);
// complete case, get result / error and print it.
try {
const mplShow = escaped.includes("plt.show()");
let mplTarget = null;
if (mplShow) {
term.echo();
const outputs = $(".terminal-output")[0].children
mplTarget = outputs[outputs.length - 1]
document.pyodideMplTarget = mplTarget
}
// Real execution happens here.
let [value] = await wrapped;
if (mplShow) {
if (mplTarget) {
mplTarget.children[0].style.display = "none";
if (mplTarget.children.length > 1) {
mplTarget.children[1].removeAttribute("id")
}
}
updateButtonLabel();
}
if (value !== undefined) {
echo(
repr_shorten.callKwargs(value, {
separator: "\n<long output truncated>\n",
}),
);
}
if (value instanceof pyodide.ffi.PyProxy) {
value.destroy();
}
} catch (e) {
if (e.constructor.name === "PythonError") {
const message = fut.formatted_error || e.message;
let msg = "";
if (lines.length > 1) {
// print the error position in multiline mode
const limit = 3;
const maxDigits = (counter + limit).toString().length;
msg += `Error occred at line ${counter}:\n`;
msg += "----------------------------------------\n"
let i = 0;
for (const line of lines) {
i++;
if (i === counter) {
msg += toDigits(i, maxDigits) + ": " + line + " <-- Error here!" + "\n";
} else if ((i >= counter - limit) && (i <= counter + limit)) {
msg += toDigits(i, maxDigits) + ": " + line + "\n";
}
}
msg += "----------------------------------------\n"
}
msg += message.trimEnd();
term.error(msg);
break;
} else {
throw e;
}
} finally {
fut.destroy();
wrapped.destroy();
}
}
term.resume();
await sleep(10);
unlock();
}
term = $("body").terminal(interpreter, {
greetings: banner,
prompt: ps1,
completionEscape: false,
completion: function (command, callback) {
callback(pyconsole.complete(command).toJs()[0]);
},
keymap: {
"CTRL+C": async function (event, original) {
clear_console();
term.enter();
echo("KeyboardInterrupt");
term.set_command("");
term.set_prompt(ps1);
},
TAB: (event, original) => {
const command = term.before_cursor();
// Disable completion for whitespaces.
if (command.trim() === "") {
term.insert("\t");
return false;
}
return original(event);
},
},
});
window.term = term;
pyconsole.stdout_callback = (s) => echo(s, { newline: false });
pyconsole.stderr_callback = (s) => {
term.error(s.trimEnd());
};
term.ready = Promise.resolve();
pyodide._api.on_fatal = async (e) => {
if (e.name === "Exit") {
term.error(e);
term.error("Pyodide exited and can no longer be used.");
} else {
term.error(
"Pyodide has suffered a fatal error. Please report this to the Pyodide maintainers.",
);
term.error("The cause of the fatal error was:");
term.error(e);
term.error("Look in the browser console for more details.");
}
await term.ready;
term.pause();
await sleep(15);
term.pause();
};
const searchParams = new URLSearchParams(window.location.search);
if (searchParams.has("noblink")) {
$(".cmd-cursor").addClass("noblink");
}
document.pyodideMplTarget = $(".terminal-wrapper")[0]
term.echo("--- Initializing ---")
term.pause();
if (initIj) {
await initImJoy();
}
term.resume();
const installRpc = toBool(searchParams.get("install_rpc"), true);
if (installRpc) {
await term.exec("import micropip; await micropip.install('imjoy-rpc')", true)
const currentUrl = new URL(window.location.href);
const libUrl = currentUrl.origin + currentUrl.pathname + "/imjoy_encode.py";
await runFile(libUrl, false)
pyodide.globals.set("api", new ImjoyApiWrapper(window.app.imjoy));
}
const showCode = toBool(urlParams.get("show_code"), true);
const code = urlParams.get("code");
if (code) {
term.echo("--- Running code ---")
$.terminal.syntax('python')
await term.exec(code, !showCode);
} else {
const file = urlParams.get("file");
if (file) {
term.echo(`--- Running ${file} ---`)
$.terminal.syntax('python')
await runFile(file, showCode);
} else {
$.terminal.syntax('python')
}
}
}
window.console_ready = initConsole();
</script>
</body>
</html>