Flutter terminal widget on top of Ghostty's libghostty-vt engine.

Overview

• Adapts to the host: mouse and keyboard on desktop, touch and soft keyboard on mobile, both on web.
• TerminalController owns the terminal and connects to a backend (PTY, SSH, socket) via output/resize/bell/title callbacks. Helpers for I/O, selection, focus, scrolling, paste, and mode toggling.
• Drag, double-click, triple-click, and Alt+drag selection over wide characters (CJK, emoji, VS16, combining marks) with cell-snapped boundaries.
• Built-in copy, paste, select all, and clear shortcuts with platform-aware defaults. Extend or replace with any Flutter Intent.
• Themes for ANSI 16, 256-color, and truecolor palettes; cursor; hyperlinks; fonts. Immutable and lerp-able.
• OSC 8 hyperlinks with idle and highlighted styles.

Getting started

dependencies:
  flterm: ^0.0.2

On web, initialize the wasm module once before mounting any terminal:

import 'package:flterm/flterm.dart';
import 'package:flutter/foundation.dart';

if (kIsWeb) {
  await initializeForWeb(Uri.parse('assets/libghostty.wasm'));
}

Usage

A TerminalController owns the terminal and talks to your I/O. A TerminalView renders it.

import 'package:flterm/flterm.dart';

final controller = TerminalController()
  ..onOutput = (bytes) => pty.write(bytes)
  ..onResize = (size) => pty.resize(size.cols, size.rows)
  ..onBell = playSound;

ptyOutputStream.listen(controller.write);

TerminalView(
  controller: controller,
  theme: TerminalTheme.dark(),
);

The same controller drives the terminal programmatically:

// I/O
controller.sendText('ls -la\n');

// Selection
controller.selectAll();
print(controller.selectedText());

// Clipboard
controller.paste('hello');

// Reset
controller.clear();

Custom themes are constructed directly:

TerminalView(
  controller: controller,
  theme: TerminalTheme(
    palette: ColorPalette(
      ansiColors: const [/* 16 ANSI colors */],
      background: const Color(0xFF1D1F21),
      foreground: const Color(0xFFC5C8C6),
    ),
    fontFamily: 'JetBrains Mono',
    fontSize: 14,
    cursor: const CursorTheme(shape: CursorShape.bar),
  ),
);

License

MIT. See LICENSE.