extension.js

   1 // extension.js
   2 // vi: et sw=2
   3 //
   4 // Advanced Volume Mixer
   5 // Control programs' volume from gnome volume mixer applet.
   6 //
   7 // Idea from: https://extensions.gnome.org/extension/142/output-device-chooser-on-volume-menu/
   8 //
   9 // Author: Harry Karvonen <harry.karvonen@gmail.com>
  10 //
  11
  12 const Clutter = imports.gi.Clutter;
  13 const Lang = imports.lang;
  14 const Gvc = imports.gi.Gvc;
  15 const Signals = imports.signals;
  16
  17 const Main = imports.ui.main;
  18 const PopupMenu = imports.ui.popupMenu;
  19
  20 const PA_INVALID_INDEX = 0xffffffff;
  21
  22 let advMixer;
  23
  24
  25 function AdvMixer(mixer) {
  26   this._init(mixer);
  27 }
  28
  29
  30 AdvMixer.prototype = {
  31   _init: function(mixer) {
  32     this._mixer = mixer;
  33     this._control = mixer._control;
  34     this._items = {};
  35
  36     this._streamAddedId = this._control.connect(
  37       "stream-added",
  38       Lang.bind(this, this._streamAdded)
  39     );
  40     this._streamRemovedId = this._control.connect(
  41       "stream-removed",
  42       Lang.bind(this, this._streamRemoved)
  43     );
  44   },
  45
  46
  47   _streamAdded: function(control, id) {
  48     if (id in this._items) {
  49       return;
  50     }
  51
  52     let stream = control.lookup_stream_id(id);
  53
  54     if (stream["is-event-stream"]) {
  55       // Do nothing
  56     } else if (stream instanceof Gvc.MixerSinkInput) {
  57       let item = new PopupMenu.PopupSliderMenuItem(
  58         stream.volume / this._control.get_vol_max_norm()
  59       );
  60       let title = new PopupMenu.PopupSwitchMenuItem(
  61         stream.name,
  62         !stream.is_muted,
  63         {activate: false}
  64       );
  65
  66       this._items[id] = [item, title];
  67
  68       item.connect(
  69         "value-changed",
  70         Lang.bind(this, this._sliderValueChanged, stream.id)
  71       );
  72
  73       title.actor.connect(
  74         "button-release-event",
  75         Lang.bind(this, this._titleToggleState, stream.id)
  76       );
  77
  78       title.actor.connect(
  79         "key-press-event",
  80         Lang.bind(this, this._titleToggleState, stream.id)
  81       );
  82
  83       //title.connect(
  84       //  "toggled",
  85       //  Lang.bind(this, this._titleToggled, stream.id)
  86       //);
  87
  88       stream.connect(
  89         "notify::volume",
  90         Lang.bind(this, this._notifyVolume, stream.id)
  91       );
  92
  93       stream.connect(
  94         "notify::is-muted",
  95         Lang.bind(this, this._notifyIsMuted, stream.id)
  96       );
  97
  98       this._mixer.menu.addMenuItem(item, 3);
  99       this._mixer.menu.addMenuItem(title, 3);
 100
 101       title.actor.show();
 102       item.actor.show();
 103     }
 104   },
 105
 106   _streamRemoved: function(control, id) {
 107     if (id in this._items) {
 108       this._items[id][0].destroy();
 109       this._items[id][1].destroy();
 110       delete this._items[id];
 111     }
 112   },
 113
 114   _sliderValueChanged: function(slider, value, id) {
 115     let stream = this._control.lookup_stream_id(id);
 116     let volume = value * this._control.get_vol_max_norm();
 117
 118     stream.volume = volume;
 119     stream.push_volume();
 120   },
 121
 122   _titleToggled: function(title, value, id) {
 123     let stream = this._control.lookup_stream_id(id);
 124
 125     stream.change_is_muted(!value);
 126
 127     return false;
 128   },
 129
 130   _titleToggleState: function(title, event, id) {
 131     //if (event.type() == Clutter.EventType.BUTTON_RELEASE) {
 132     //} else
 133     if (event.type() == Clutter.EventType.KEY_PRESS) {
 134       let symbol = event.get_key_symbol();
 135
 136       if (symbol != Clutter.KEY_space && symbol != Clutter.KEY_Return) {
 137         return false;
 138       }
 139     }
 140
 141     let stream = this._control.lookup_stream_id(id);
 142
 143     stream.change_is_muted(!stream.is_muted);
 144
 145     return true;
 146   },
 147
 148   _notifyVolume: function(object, param_spec, id) {
 149     let stream = this._control.lookup_stream_id(id);
 150
 151     this._items[id][0].setValue(stream.volume / this._control.get_vol_max_norm());
 152   },
 153
 154   _notifyIsMuted: function(object, param_spec, id) {
 155     let stream = this._control.lookup_stream_id(id);
 156
 157     this._items[id][1].setToggleState(!stream.is_muted);
 158   },
 159
 160   destroy: function() {
 161     this._control.disconnect(this._streamAddedId);
 162     this._control.disconnect(this._streamRemovedId);
 163     this.emit("destroy");
 164   }
 165 };
 166
 167
 168 Signals.addSignalMethods(AdvMixer.prototype);
 169
 170
 171 function main() {
 172   init();
 173   enable();
 174 }
 175
 176
 177 function init() {
 178 }
 179
 180
 181 function enable() {
 182   if (Main.panel._statusArea['volume'] && !advMixer) {
 183     advMixer = new AdvMixer(Main.panel._statusArea["volume"]);
 184   }
 185 }
 186
 187
 188 function disable() {
 189   if (advMixer) {
 190     advMixer.destroy();
 191     advMixer = null;
 192   }
 193 }
 194