├── .gitignore
├── LICENSE
├── README.md
├── index.js
└── package.json


/.gitignore:
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1 | node_modules
2 | 


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/LICENSE:
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 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2017 Mathias Buus
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in
13 | all copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 | THE SOFTWARE.
22 | 


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/README.md:
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 1 | # brightnessctl
 2 | 
 3 | Small tool for linux to adjust screen brightness.
 4 | 
 5 | ```
 6 | npm install -g brightnessctl
 7 | ```
 8 | 
 9 | Tested on the Dell XPS13 running Arch.
10 | 
11 | ## Usage
12 | 
13 | To adjust the screen brightness simply run
14 | 
15 | ```
16 | sudo brightnessctl
17 | ```
18 | 
19 | It will print an interactive slider that looks like this:
20 | 
21 | ```
22 | Use <left> and <right> to adjust brightness
23 | [#######                                        ]  15%
24 | ```
25 | 
26 | You can also adjust the brightness with a cli argument like so
27 | 
28 | ```
29 | sudo brightnessctl 50 # sets the brightness to 50%
30 | ```
31 | 
32 | PRs that add support for more distros welcome.
33 | 
34 | ## License
35 | 
36 | MIT
37 | 


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/index.js:
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 1 | #!/usr/bin/env node
 2 | 
 3 | if (process.getuid()) {
 4 |   console.error('Run as root')
 5 |   process.exit(1)
 6 | }
 7 | 
 8 | var diffy = require('diffy')()
 9 | var input = require('diffy/input')()
10 | var fs = require('fs')
11 | var path = require('path')
12 | 
13 | var FOLDER = '/sys/class/backlight/intel_backlight'
14 | var BRIGHTNESS_FILE = path.join(FOLDER, 'brightness')
15 | var MAX_BRIGHTNESS_FILE = path.join(FOLDER, 'max_brightness')
16 | var MAX = readInt(MAX_BRIGHTNESS_FILE)
17 | 
18 | var pct = Math.floor(100 * readInt(BRIGHTNESS_FILE) / MAX)
19 | var inc = 5
20 | 
21 | var ws = fs.createWriteStream(BRIGHTNESS_FILE)
22 | 
23 | input.on('right', function () {
24 |   pct += inc
25 |   if (pct > 100) pct = 100
26 |   update()
27 | })
28 | 
29 | input.on('left', function () {
30 |   pct -= inc
31 |   if (pct < 0) pct = 0
32 |   update()
33 | })
34 | 
35 | diffy.render(render)
36 | 
37 | if (/^\d+?$/.test(process.argv[2])) {
38 |   pct = parseInt(process.argv[2], 10)
39 |   update()
40 |   ws.end()
41 |   ws.on('close', exit)
42 | }
43 | 
44 | function exit () {
45 |   process.exit(0)
46 | }
47 | 
48 | function readInt (file) {
49 |   return parseInt(fs.readFileSync(file, 'ascii'), 10)
50 | }
51 | 
52 | function update () {
53 |   ws.write('' + Math.max(1, Math.floor(pct / 100 * MAX)) + '\n')
54 |   diffy.render()
55 | }
56 | 
57 | function times (str, n) {
58 |   var res = ''
59 |   while (n--) res += str
60 |   return res
61 | }
62 | 
63 | function render () {
64 |   var wid = Math.max(0, process.stdout.columns - 8)
65 |   var widPct = Math.floor(wid * pct / 100)
66 |   var slider = '[' + times('#', widPct) + times(' ', wid - widPct) + ']'
67 | 
68 |   return  'Use <left> and <right> to adjust brightness\n' +
69 |     slider + ' ' + (pct < 10 ? '  ' : (pct < 100 ? ' ' : '')) + pct + '%\n'
70 | }
71 | 
72 | function noop () {}
73 | 


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/package.json:
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 1 | {
 2 |   "name": "brightnessctl",
 3 |   "version": "1.1.0",
 4 |   "description": "Small tool for linux to adjust screen brightness",
 5 |   "main": "index.js",
 6 |   "dependencies": {
 7 |     "diffy": "^1.0.1"
 8 |   },
 9 |   "devDependencies": {
10 |     "standard": "^10.0.3"
11 |   },
12 |   "bin": {
13 |     "brightnessctl": "./index.js"
14 |   },
15 |   "scripts": {
16 |     "test": "standard"
17 |   },
18 |   "repository": {
19 |     "type": "git",
20 |     "url": "https://github.com/mafintosh/brightnessctl.git"
21 |   },
22 |   "author": "Mathias Buus (@mafintosh)",
23 |   "license": "MIT",
24 |   "bugs": {
25 |     "url": "https://github.com/mafintosh/brightnessctl/issues"
26 |   },
27 |   "homepage": "https://github.com/mafintosh/brightnessctl"
28 | }
29 | 


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