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Terminal

Documentation | Examples

Terminal is your one-stop shop for building graphical terminal applications.

  • Intuitive: No need to mess around with ANSI escape sequences anymore
  • Fast: Optimized rendering enables dynamic graphics in the terminal
  • Featureful: All the functionality you expect is there, and more!

Features

  • Optimized rendering: Terminal drawing operations are queued and then applied all at once on terminal refresh. Double buffering is used to only redraw dirty (i.e. changed) cells.
  • 24-bit true color support: Use the full RGB range of colors in your application.
  • Canvas API: Draw pixels, shapes and images on the terminal. Vertical resoluton is doubled by using half-block unicode characters.

Usage

import { Terminal, TerminalCanvas, Colors } from "https://deno.land/x/terminal@0.1.0-dev.1/src/mod.ts";

// The terminal canvas layer allows for direct interaction with the terminal
const terminal = new Terminal();
terminal.initialize();
terminal.setCell(3, 4, "!", Colors.WHITE, Colors.BLACK);
terminal.refresh();

// Don't want to work with a terminal-centric API? Use the canvas layer to work directly with pixels and images
const canvas = new TerminalCanvas();
canvas.drawPixel(2, 4, Colors.RED);
canvas.drawImage(4, 5, img);
canvas.render();

The library consists of two interfaces: the Terminal interface and the TerminalCanvas interface.

The Terminal interface provides gives you direct access to the terminal. It provides functions to clear the screen, modify terminal cells and grab incoming terminal input events.

  • Terminal.initialize: Initialize the terminal.
  • Terminal.setCell: Modify a terminal cell
  • Terminal.refresh: Flush everything to the terminal
  • Terminal.close: Close the terminal. It’s important to always call this, because otherwise the terminal you’re running on may be left in an unusable state.

The TerminalCanvas is a wrapper of the Terminal that provides a canvas-like API for pixel-based drawing operations.

  • TerminalCanvas.drawPixel: Draw a pixel
  • TerminalCanvas.drawLine: Draw a line
  • TerminalCanvas.drawRectangle: Draw a (filled) rectangle
  • TerminalCanvas.drawPath: Draw a path between a series of points
  • TerminalCanvas.drawShape: Draw a (filled) shape
  • TerminalCanvas.drawImage: Draw an image
  • TerminalCanvas.render: Flush everything to the screen.

Want to know more? Take a look at the documentation, or go directly to the examples to get started.

Installation

No installation is required, just import the features you want directly from the deno.land url where the library is hosted:

import { Terminal } from "https://deno.land/x/terminal@0.1.0-dev.1/src/mod.ts";