cubeJS/terminal.html at main · franck403/cubeJS · GitHub

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<!doctype html>
<html>
<head>
  <meta charset="utf-8" />
  <title>Spike Serial Console</title>
  <style>
    body { margin:0; background:#111; color:#eee; font-family: monospace; }
    #toolbar { background:#222; padding:6px; }
    #console {
      height: calc(100vh - 40px);
      padding: 8px;
      overflow-y: auto;
      white-space: pre-wrap;
      outline: none;
      user-select: text; /* allow copy selection */
    }
    .out { color:#eee; }
    .in { color:#0f0; }
    .sys { color:#0ff; }
    .err { color:#f55; }
  </style>
</head>
<body>
  <div id="toolbar">
    <button id="connectBtn">Connect</button>
    <button id="disconnectBtn" disabled>Disconnect</button>
  </div>
  <div id="console" tabindex="0"></div>

<script>
(async () => {
  let port, reader, writer, readAbort;
  let inputBuffer = "";
  let history = [], histIdx = -1;
  const consoleEl = document.getElementById("console");
  const connectBtn = document.getElementById("connectBtn");
  const disconnectBtn = document.getElementById("disconnectBtn");

  function print(msg, cls="out") {
    const span = document.createElement("span");
    span.className = cls;
    span.textContent = msg;
    consoleEl.appendChild(span);
    consoleEl.scrollTop = consoleEl.scrollHeight;
  }
  function newLine() { print("\n"); }
  function prompt() {
    //print(">>> ", "in");
    inputBuffer = "";
  }

  async function connectPort() {
    try {
      port = await navigator.serial.requestPort();
      await port.open({ baudRate: 115200 });
      writer = port.writable.getWriter();

      // Send CTRL-C immediately
      await writer.write(new Uint8Array([3]));
      print("[Sent CTRL-C]\n", "sys");

      if (port.readable) {
        readAbort = new AbortController();
        const decoder = new TextDecoderStream();
        port.readable.pipeTo(decoder.writable, { signal: readAbort.signal });
        reader = decoder.readable.getReader();
        readLoop();
      }

      connectBtn.disabled = true;
      disconnectBtn.disabled = false;
      print("Connected\n", "sys");
      prompt();
    } catch (e) {
      print("Error: " + e + "\n", "err");
    }
  }

  async function readLoop() {
    try {
      while (true) {
        const { value, done } = await reader.read();
        if (done) break;
        if (value) print(value, "out");
      }
    } catch (e) {
      print("Read error: " + e + "\n", "err");
    }
  }

  async function sendLine(text) {
    if (!writer) return;
    const normalized = text.replace(/\r?\n/g, "\r\n") + "\r\n";
    await writer.write(new TextEncoder().encode(normalized));
    //print(">>> " + text + "\n", "in");
  }

  async function disconnectPort() {
    if (reader) { await reader.cancel(); reader.releaseLock(); }
    if (readAbort) readAbort.abort();
    if (writer) { await writer.close(); writer.releaseLock(); }
    if (port) { await port.close(); }
    port = null;
    connectBtn.disabled = false;
    disconnectBtn.disabled = true;
    print("Disconnected\n", "sys");
  }

  connectBtn.onclick = connectPort;
  disconnectBtn.onclick = disconnectPort;

  // Handle key input like a terminal
  consoleEl.addEventListener("keydown", async (e) => {
    if (!writer) return; // not connected

    // Ctrl+C: send 0x03 if nothing selected
    if (e.ctrlKey && e.key.toLowerCase() === "c") {
      if (window.getSelection().toString()) {
        return; // let browser copy work
      }
      e.preventDefault();
      await writer.write(new Uint8Array([3]));
      print("[CTRL-C sent]\n", "sys");
      return;
    }

    // Ctrl+V: paste text
    if (e.ctrlKey && e.key.toLowerCase() === "v") {
      e.preventDefault();
      try {
        const clip = await navigator.clipboard.readText();
        if (clip) {
          inputBuffer += clip;
          consoleEl.lastChild.textContent = ">>> " + inputBuffer;
        }
      } catch (err) {
        print("[Clipboard error: " + err + "]\n", "err");
      }
      return;
    }

    if (e.key === "Enter") {
      e.preventDefault();
      newLine();
      if (inputBuffer.trim() !== "") {
        history.unshift(inputBuffer);
        histIdx = -1;
        await sendLine(inputBuffer);
      }
      prompt();
    } else if (e.key === "Backspace") {
      e.preventDefault();
      if (inputBuffer.length > 0) {
        inputBuffer = inputBuffer.slice(0, -1);
        consoleEl.lastChild.textContent = "\n>>> " + inputBuffer;
      }
    } else if (e.key === "ArrowUp") {
      e.preventDefault();
      if (history.length > 0) {
        histIdx = Math.min(histIdx + 1, history.length - 1);
        inputBuffer = history[histIdx];
        consoleEl.lastChild.textContent = "\n>>> " + inputBuffer;
      }
    } else if (e.key === "ArrowDown") {
      e.preventDefault();
      if (histIdx > 0) {
        histIdx--;
        inputBuffer = history[histIdx];
      } else {
        histIdx = -1;
        inputBuffer = "\n";
      }
      consoleEl.lastChild.textContent = ">>> " + inputBuffer;
    } else if (e.key.length === 1 && !e.ctrlKey && !e.metaKey) {
      e.preventDefault();
      inputBuffer += e.key;
      consoleEl.lastChild.textContent = "\n>>> " + inputBuffer;
    }
  });

  // auto focus console
  consoleEl.focus();
})();
</script>
</body>
</html>