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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="A WebSerial module for live serial comms with stations" />
<meta name="show-in" content="station" />
<title>Live WebSerial</title>
<script src="https://edrys-org.github.io/edrys/module/edrys.js"></script>
<script defer src="https://edrys-org.github.io/edrys/module/vendor/alpine.min.js"></script>
<link rel="stylesheet" href="https://edrys-org.github.io/edrys/module/vendor/water.min.css" />
<link rel="stylesheet" href="https://edrys-org.github.io/edrys/module/vendor/open-iconic/css/open-iconic.min.css" />
<script src="./xterm/xterm.min.js"></script>
<link rel="stylesheet" href="./xterm/xterm.min.css">
</head>
<body>
<template x-if="!!edrys" x-data="{ edrys: undefined }"
x-init="async e => { Edrys.onUpdate((e) => { edrys = {...e} }) }">
<div x-show="edrys.role == 'station'"
x-data="{ baudRate: edrys.module.config.baud || edrys.getItem('baud') || 9600, ready: false }"
x-effect="e => { edrys.setItem('baud', baudRate) }">
<div x-show="!ready">
<label for="baud" style="float: left; padding: 10px">Baud Rate:</label>
<button style="float: right"
@click="async (e) => { ready = await serial_connect(baudRate, true); }">Connect</button>
<select id="baud" x-model="baudRate">
<option value="1200">1200</option>
<option value="2400">2400</option>
<option value="4800">4800</option>
<option value="9600">9600</option>
<option value="19200">19200</option>
<option value="38400">38400</option>
<option value="57600">57600</option>
<option value="115200">115200</option>
</select>
</div>
<div x-show="ready">
<button style="z-index: 100; position: absolute; right: 5px; top: 5px;"
@click="async (e) => { await serial_close(); }">Disconnect</button>
</div>
</div>
</template>
<div id="terminal"></div>
<script type="module">
import { FitAddon } from './xterm/xterm-addon-fit.js'
var term = new Terminal()
term.open(document.getElementById('terminal'));
const fitAddon = new FitAddon();
term.loadAddon(fitAddon);
fitAddon.fit();
term.onKey(e => {
Edrys.sendMessage('w', e.key)
})
Edrys.onMessage(({ from, subject, body }) => {
term.write(body.replace('\n', '\r').replace('\r', '\n\r'))
if (subject == 'w' && Edrys.role == 'station')
serial_write(body)
})
</script>
<script>
Edrys.onReady(async () => {
while (true) {
if (await serial_connect(Edrys.module.config.baud || Edrys.getItem('baud') || 9600)) {
console.log('Auto-connected')
ready = true;
port.addEventListener('disconnect', async e => {
ready = false;
await serial_close()
});
return;
}
}
})
let connected = false;
let port = null
async function serial_connect(baudRate, userInitiated = false) {
if (connected) return true
if (userInitiated) {
port = await navigator.serial.requestPort()
return true
}
port = await navigator.serial.getPorts();
if ((port !== null) && (Array.isArray(port)) && (port.length > 0)) {
port = port[0];
} else {
return false
};
if (port && !connected) {
await port.open({ baudRate: baudRate });
connected = true
setTimeout(e => serial_read(), 1)
}
return connected
}
let reader = null
let readableStreamClosed = null
async function serial_read() {
if (!port) { connected = false; return; }
const textDecoder = new TextDecoderStream();
readableStreamClosed = port.readable.pipeTo(textDecoder.writable);
reader = textDecoder.readable.getReader();
while (true) {
const { value, done } = await reader.read();
if (done) {
reader.releaseLock();
break;
}
Edrys.sendMessage('r', value);
}
}
async function serial_close() {
window.location.reload()
}
let writerInit = false;
let writer = null
let writableStreamClosed = null
async function serial_write(text) {
if (!port || !connected) { connected = false; return; }
if (!writerInit) {
const textEncoder = new TextEncoderStream();
writableStreamClosed = textEncoder.readable.pipeTo(port.writable);
writer = textEncoder.writable.getWriter();
writerInit = true
}
if (writer)
await writer.write(text);
}
</script>
<style>
body,
html,
#terminal,
.terminal {
height: 100%;
width: 100%;
max-width: 100%;
margin: 0;
padding: 0;
}
body {
overflow: hidden;
}
</style>
</body>
</html>