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nathanpeck / clui

Command Line UI toolkit for Node.js
MIT License
1.66k stars 40 forks source link

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clui

This is a Node.js toolkit for quickly building nice looking command line interfaces which can respond to changing terminal sizes. It also includes the following easy to use components:

Updates

Changelog

October 8, 2014 - Adding Line.contents() for fetching the contents of a line as a string.

June 2, 2014 - Fixed a crash caused by inability to locate the required trim helper in the latest version of cli-color. (And locked down the version of the cli-color dependency to stop this from ever happening again.) Also removed lodash as a dependency in favor of vanilla JS, to keep installs faster and smaller than ever.

LineBuffer(options)

Creates an object for buffering a group of text lines and then outputting them. When printing lines using LineBuffer it will crop off extra width and height so that the lines will fit into a specific space.

Options

The following options can be passed in on creation of the LineBuffer

Functions

Example

var CLI = require('clui'),
    clc = require('cli-color');

var Line          = CLI.Line,
    LineBuffer    = CLI.LineBuffer;

var outputBuffer = new LineBuffer({
  x: 0,
  y: 0,
  width: 'console',
  height: 'console'
});

var message = new Line(outputBuffer)
  .column('Title Placehole', 20, [clc.green])
  .fill()
  .store();

var blankLine = new Line(outputBuffer)
  .fill()
  .store();

var header = new Line(outputBuffer)
  .column('Suscipit', 20, [clc.cyan])
  .column('Voluptatem', 20, [clc.cyan])
  .column('Nesciunt', 20, [clc.cyan])
  .column('Laudantium', 11, [clc.cyan])
  .fill()
  .store();

var line;
for(var l = 0; l < 20; l++)
{
  line = new Line(outputBuffer)
    .column((Math.random()*100).toFixed(3), 20)
    .column((Math.random()*100).toFixed(3), 20)
    .column((Math.random()*100).toFixed(3), 20)
    .column((Math.random()*100).toFixed(3), 11)
    .fill()
    .store();
}

outputBuffer.output();

Line(outputBuffer)

This chainable object can be used to generate a line of text with columns, padding, and fill. The parameter outputBuffer can be provided to save the line of text into a LineBuffer object for future outputting, or you can use LineBuffer.addLine() to add a Line object into a LineBuffer.

Alternatively if you do not wish to make use of a LineBuffer you can just use Line.output() to output the Line immediately rather than buffering it.

Chainable Functions

Example

var clui = require('clui'),
    clc = require('cli-color'),
    Line = clui.Line;

var headers = new Line()
  .padding(2)
  .column('Column One', 20, [clc.cyan])
  .column('Column Two', 20, [clc.cyan])
  .column('Column Three', 20, [clc.cyan])
  .column('Column Four', 20, [clc.cyan])
  .fill()
  .output();

var line = new Line()
  .padding(2)
  .column((Math.random()*100).toFixed(3), 20)
  .column((Math.random()*100).toFixed(3), 20)
  .column((Math.random()*100).toFixed(3), 20)
  .column((Math.random()*100).toFixed(3), 20)
  .fill()
  .output();

Gauge(value, maxValue, gaugeWidth, dangerZone, suffix)

Picture of two gauges

Draw a basic horizontal gauge to the screen.

Parameters

Example

var os   = require('os'),
    clui = require('clui');

var Gauge = clui.Gauge;

var total = os.totalmem();
var free = os.freemem();
var used = total - free;
var human = Math.ceil(used / 1000000) + ' MB';

console.log(Gauge(used, total, 20, total * 0.8, human));

Sparkline(values, suffix)

Picture of two sparklines

A simple command line sparkline that draws a series of values, and highlights the peak for the period. It also automatically outputs the current value and the peak value at the end of the sparkline.

Parameters

Example

var Sparkline = require('clui').Sparkline;
var reqsPerSec = [10,12,3,7,12,9,23,10,9,19,16,18,12,12];

console.log(Sparkline(reqsPerSec, 'reqs/sec'));

Progress(length)

Picture of a few progress bars

Parameters

Methods

Example

var clui = require('clui');

var Progress = clui.Progress;

var thisProgressBar = new Progress(20);
console.log(thisProgressBar.update(10, 30));

// or

var thisPercentBar = new Progress(20);
console.log(thisPercentBar.update(0.4));

Spinner(statusText)

Picture of a spinner

Parameters

Methods

Note: The spinner is slightly different from other Clui controls in that it outputs directly to the screen, instead of just returning a string that you output yourself.

Example

var CLI = require('clui'),
    Spinner = CLI.Spinner;

var countdown = new Spinner('Exiting in 10 seconds...  ', ['⣾','⣽','⣻','⢿','⡿','⣟','⣯','⣷']);

countdown.start();

var number = 10;
setInterval(function () {
  number--;
  countdown.message('Exiting in ' + number + ' seconds...  ');
  if (number === 0) {
    process.stdout.write('\n');
    process.exit(0);
  }
}, 1000);

License

Copyright (C) 2014 Nathan Peck (https://github.com/nathanpeck)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.