128 lines
3.5 KiB
JavaScript
128 lines
3.5 KiB
JavaScript
var term;
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var termfit;
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var emulator;
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var booted = false;
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document.addEventListener("DOMContentLoaded", () => {
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// Debug
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var v86_display = undefined;
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if(window.location.hash == "#debug") {
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document.getElementById("screen").classList.add("visible");
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}
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// Initialize the v86 emulator
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emulator = new V86Starter({
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wasm_path: "assets/v86.wasm",
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memory_size: 512 * 1024 * 1024,
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vga_memory_size: 100 * 1024 * 1024,
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screen_container: document.getElementById("screen"),
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bios: {
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url: "images/seabios.bin",
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},
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vga_bios: {
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url: "images/vgabios.bin",
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},
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cdrom: {
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url: "images/os.iso",
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},
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autostart: true,
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});
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// Initialize xterm.js
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term = new Terminal({
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rendererType: 'dom',
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});
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termcontainer = document.getElementById('terminal');
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term.open(termcontainer);
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// Fit xterm to the size of the container
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termfit = new FitAddon.FitAddon();
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term.loadAddon(termfit);
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termfit.fit()
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// Write a "Booting WebTerm ..." message
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term.write('\033[1;34mDownloading\033[0m OS images ...\r\n')
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// Forward keystrokes from xterm to v86
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term.onKey(key => onConsoleInput(key));
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// Forward output from v86 to xterm and other functions
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emulator.add_listener("serial0-output-char", (char) => onConsoleOutput(char));
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emulator.add_listener("serial0-output-line", (line) => onConsoleLine(line));
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// Wait for the emulator to get ready
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emulator.add_listener("emulator-ready", () => {
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term.write('Booting \x1B[1;3;31mWebTerm\x1B[0m ...\r\n')
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})
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})
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function onConsoleOutput(char) {
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// Only write to the xterm if the system is fully booted
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if(booted) {
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term.write(char);
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}
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// If the char is the shell prompt after the login message start
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// the welcome script and set bootet to true
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if(char == "#" && previous_line.includes("buildroot login: root")) {
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emulator.serial0_send("/etc/init.d/S99welcome\n")
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booted = true;
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}
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}
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var debugcnt = 0;
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var debugword = "+++debug+++"
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function onConsoleInput(key) {
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// If key is Strg+V
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if((key.domEvent.key == "v") && key.domEvent.altKey && key.domEvent.ctrlKey) {
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debug("paste")
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navigator.clipboard.readText().then((text) => {
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emulator.serial0_send(text)
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})
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return;
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}
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if((key.domEvent.key == "c") && key.domEvent.altKey && key.domEvent.ctrlKey) {
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debug("copy")
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document.execCommand("copy")
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return;
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}
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// Send keys from xterm to v86
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emulator.serial0_send(key.key)
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// Listen for the debug key combination
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if(key.key == debugword[debugcnt]) {
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debugcnt++;
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} else {
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debugcnt = 0;
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}
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if(debugcnt == debugword.length) {
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document.getElementById("screen").classList.toggle("visible");
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}
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debug("debugcnt "+debugcnt)
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}
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var previous_line = "";
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function onConsoleLine(line) {
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// Enter username on the login prompt
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if (line.startsWith("Welcome to WebTerm")) {
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emulator.serial0_send("root\n")
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}
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// Save the line
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previous_line = line;
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}
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// Resize the terminal
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window.addEventListener("resize", () => {
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resize();
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})
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function resize() {
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// Resize the terminal
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termfit.fit();
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// Send tty resize over /dev/console so that the user can't see it
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emulator.keyboard_send_text(`stty cols ${term.cols} rows ${term.rows} -F /dev/ttyS0\n`)
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}
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function debug(text) {
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console.debug("DEBUG: "+text)
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} |