├── README.md
├── Screenshots
    └── power_consumption.png
├── extension.js
├── metadata.json
└── stylesheet.css


/README.md:
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 1 | # Power Consumption Extension
 2 | 
 3 | Having a laptop with not much battery and a backlit keyboard made me wonder how much power it was spending at each moment. Being able to gather that information from the system and putting it into a shell script was the first thing to do, but as I use Gnome on my daily basis, I just created this small extension to show up the power consumption.
 4 | 
 5 | Currently it refreshes each second
 6 | 
 7 | ## Wishlist:
 8 | 
 9 | - Preferences to set the refresh rate
10 | - Detect more than one battery
11 | - Detect if there's no battery and show just a `-`
12 | - Select Battery to take power consumption from
13 | 
14 | ## Changelog:
15 | 
16 | ### 0.1
17 | 
18 | - First Version, just showing power consumption


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/Screenshots/power_consumption.png:
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https://raw.githubusercontent.com/ferdef/power_consumption/10e489d1a01c1a13f82f541b5153c773b439b6ad/Screenshots/power_consumption.png


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/extension.js:
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  1 | 'use strict';
  2 | 
  3 | // imports.gi.versions.Gtk = '3.0';
  4 | // imports.gi.versions.WebKit2 = '4.0';
  5 | 
  6 | const Gio = imports.gi.Gio;
  7 | const GLib = imports.gi.GLib;
  8 | const GObject = imports.gi.GObject;
  9 | const Clutter = imports.gi.Clutter;
 10 | const St = imports.gi.St;
 11 | 
 12 | const ExtensionUtils = imports.misc.extensionUtils;
 13 | const Me = ExtensionUtils.getCurrentExtension();
 14 | const Main = imports.ui.main;
 15 | const PanelMenu = imports.ui.panelMenu;
 16 | 
 17 | const Lang = imports.lang;
 18 | const Mainloop = imports.mainloop;
 19 | 
 20 | const Config = imports.misc.config;
 21 | const SHELL_MINOR = parseInt(Config.PACKAGE_VERSION.split('.')[1]);
 22 | 
 23 | var label = null;
 24 | var indicator = null;
 25 | 
 26 | var PowerConsumption = class PowerConsumption extends PanelMenu.Button {
 27 |   _init() {
 28 |     super._init(0.0, `${Me.metadata.name} Indicator`, false);
 29 |     
 30 |     label = new St.Label({
 31 |       text: get_data(),
 32 |       y_align: Clutter.ActorAlign.CENTER,
 33 |       style_class: 'power_consumption_label'
 34 |     });
 35 | 
 36 |     this.add_child(label);
 37 |     
 38 |     this._update();
 39 |   }
 40 |   
 41 |   _update() {
 42 |     label.set_text(get_data());
 43 |     Mainloop.timeout_add_seconds(1, Lang.bind(this, this._update));
 44 |   }
 45 | }
 46 | 
 47 | if (SHELL_MINOR > 30) {
 48 |   PowerConsumption = GObject.registerClass(
 49 |     {GTypeName: 'PowerConsumption'},
 50 |     PowerConsumption
 51 |   );
 52 | }
 53 | 
 54 | function get_current_path() {
 55 |   return "/sys/class/power_supply/BAT0/current_now";
 56 | }
 57 | 
 58 | function get_voltage_path() {
 59 |   return "/sys/class/power_supply/BAT0/voltage_now";
 60 | }
 61 | 
 62 | function get_current() {
 63 |   var filepath = get_current_path();
 64 |   if(GLib.file_test (filepath, GLib.FileTest.EXISTS)) {
 65 |     return parseInt(GLib.file_get_contents(filepath)[1]);
 66 |   }
 67 | 
 68 |   return null;
 69 | }
 70 | 
 71 | function get_voltage() {
 72 |   var filepath = get_voltage_path();
 73 |   if(GLib.file_test (filepath, GLib.FileTest.EXISTS)) {
 74 |     return parseInt(GLib.file_get_contents(filepath)[1]);
 75 |   }
 76 | }
 77 | 
 78 | function get_data() {
 79 |   var power_str = "N/A";
 80 |   var current = get_current();
 81 |   var voltage = get_voltage();
 82 | 
 83 |   if (current && voltage) {
 84 |     var raw_power = (current * voltage) / 1000000000000;
 85 |   
 86 |     var power = (Math.round(raw_power * 100) / 100).toFixed(2);
 87 | 
 88 |     power_str = `${String(power)} W`;
 89 |   }
 90 |   
 91 |   return(power_str);
 92 | }
 93 | 
 94 | function init() {
 95 |   log(`initializing ${Me.metadata.name} version ${Me.metadata.version}`);
 96 | }
 97 | 
 98 | function enable() {
 99 |  
100 |   indicator = new PowerConsumption();
101 |   
102 |   log(`Enabling ${Me.metadata.name} version ${Me.metadata.version}`);
103 | 
104 |   Main.panel.addToStatusArea(`${Me.metadata.name}`, indicator);
105 | }
106 | 
107 | function disable() {
108 |   log(`Disabling ${Me.metadata.name} version ${Me.metadata.version}`);
109 |   
110 |   if (indicator !== null) {
111 |     indicator.destroy();
112 |     indicator = null;
113 |   }
114 | }
115 | 


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/metadata.json:
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 1 | {
 2 |   "name": "Power Consumption",
 3 |   "description": "Show power consumption in a laptop",
 4 |   "uuid": "power_consumption@f3rd3f",
 5 |   "shell-version": [
 6 |     "3.34"
 7 |   ],
 8 |   "version": 0.1,
 9 |   "url": "https://github.com/ferdef/power_consumption"
10 | }
11 | 


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/stylesheet.css:
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1 | .power_consumption_label {
2 |     font-size: smaller;
3 | }


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