gnome-shell/js/ui/status/volume.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const Gio = imports.gi.Gio;
const Gvc = imports.gi.Gvc;
const St = imports.gi.St;
const Signals = imports.signals;
const PanelMenu = imports.ui.panelMenu;
const PopupMenu = imports.ui.popupMenu;
const Slider = imports.ui.slider;
const VOLUME_NOTIFY_ID = 1;
// Each Gvc.MixerControl is a connection to PulseAudio,
// so it's better to make it a singleton
let _mixerControl;
function getMixerControl() {
if (_mixerControl)
return _mixerControl;
_mixerControl = new Gvc.MixerControl({ name: 'GNOME Shell Volume Control' });
_mixerControl.open();
return _mixerControl;
}
const StreamSlider = new Lang.Class({
Name: 'StreamSlider',
_init: function(control) {
this._control = control;
this.item = new PopupMenu.PopupBaseMenuItem({ activate: false });
this._slider = new Slider.Slider(0);
this._slider.connect('value-changed', Lang.bind(this, this._sliderChanged));
this._slider.connect('drag-end', Lang.bind(this, this._notifyVolumeChange));
this._icon = new St.Icon({ style_class: 'popup-menu-icon' });
this.item.actor.add(this._icon);
this.item.actor.add(this._slider.actor, { expand: true });
this.item.actor.connect('button-press-event', Lang.bind(this, function(actor, event) {
return this._slider.startDragging(event);
}));
this.item.actor.connect('key-press-event', Lang.bind(this, function(actor, event) {
return this._slider.onKeyPressEvent(actor, event);
}));
this._stream = null;
},
get stream() {
return this._stream;
},
set stream(stream) {
if (this._stream) {
this._disconnectStream(this._stream);
}
this._stream = stream;
if (this._stream) {
this._connectStream(this._stream);
this._updateVolume();
} else {
this.emit('stream-updated');
}
this._updateVisibility();
},
_disconnectStream: function(stream) {
stream.disconnect(this._mutedChangedId);
this._mutedChangedId = 0;
stream.disconnect(this._volumeChangedId);
this._volumeChangedId = 0;
},
_connectStream: function(stream) {
this._mutedChangedId = stream.connect('notify::is-muted', Lang.bind(this, this._updateVolume));
this._volumeChangedId = stream.connect('notify::volume', Lang.bind(this, this._updateVolume));
},
_shouldBeVisible: function() {
return this._stream != null;
},
_updateVisibility: function() {
let visible = this._shouldBeVisible();
this.item.actor.visible = visible;
},
scroll: function(event) {
return this._slider.scroll(event);
},
setValue: function(value) {
// piggy-back off of sliderChanged
this._slider.setValue(value);
},
_sliderChanged: function(slider, value, property) {
if (!this._stream)
return;
let volume = value * this._control.get_vol_max_norm();
let prevMuted = this._stream.is_muted;
if (volume < 1) {
this._stream.volume = 0;
if (!prevMuted)
this._stream.change_is_muted(true);
} else {
this._stream.volume = volume;
if (prevMuted)
this._stream.change_is_muted(false);
}
this._stream.push_volume();
},
_notifyVolumeChange: function() {
global.cancel_theme_sound(VOLUME_NOTIFY_ID);
global.play_theme_sound(VOLUME_NOTIFY_ID,
'audio-volume-change',
_("Volume changed"),
Clutter.get_current_event ());
},
_updateVolume: function() {
let muted = this._stream.is_muted;
this._slider.setValue(muted ? 0 : (this._stream.volume / this._control.get_vol_max_norm()));
this.emit('stream-updated');
},
getIcon: function() {
if (!this._stream)
return null;
let volume = this._stream.volume;
if (this._stream.is_muted || volume <= 0) {
return 'audio-volume-muted-symbolic';
} else {
let n = Math.floor(3 * volume / this._control.get_vol_max_norm()) + 1;
if (n < 2)
return 'audio-volume-low-symbolic';
if (n >= 3)
return 'audio-volume-high-symbolic';
return 'audio-volume-medium-symbolic';
}
}
});
Signals.addSignalMethods(StreamSlider.prototype);
const OutputStreamSlider = new Lang.Class({
Name: 'OutputStreamSlider',
Extends: StreamSlider,
_init: function(control) {
this.parent(control);
this._slider.actor.accessible_name = _("Volume");
},
_connectStream: function(stream) {
this.parent(stream);
this._portChangedId = stream.connect('notify::port', Lang.bind(this, this._portChanged));
this._portChanged();
},
_findHeadphones: function(sink) {
// This only works for external headphones (e.g. bluetooth)
if (sink.get_form_factor() == 'headset' ||
sink.get_form_factor() == 'headphone')
return true;
// a bit hackish, but ALSA/PulseAudio have a number
// of different identifiers for headphones, and I could
// not find the complete list
if (sink.get_ports().length > 0)
return sink.get_port().port.indexOf('headphone') >= 0;
return false;
},
_disconnectStream: function(stream) {
this.parent(stream);
stream.disconnect(this._portChangedId);
this._portChangedId = 0;
},
_updateSliderIcon: function() {
this._icon.icon_name = (this._hasHeadphones ?
'audio-headphones-symbolic' :
'audio-speakers-symbolic');
},
_portChanged: function() {
let hasHeadphones = this._findHeadphones(this._stream);
if (hasHeadphones != this._hasHeadphones) {
this._hasHeadphones = hasHeadphones;
this._updateSliderIcon();
}
}
});
const InputStreamSlider = new Lang.Class({
Name: 'InputStreamSlider',
Extends: StreamSlider,
_init: function(control) {
this.parent(control);
this._slider.actor.accessible_name = _("Microphone");
this._control.connect('stream-added', Lang.bind(this, this._maybeShowInput));
this._control.connect('stream-removed', Lang.bind(this, this._maybeShowInput));
this._icon.icon_name = 'audio-input-microphone-symbolic';
},
_connectStream: function(stream) {
this.parent(stream);
this._maybeShowInput();
},
_maybeShowInput: function() {
// only show input widgets if any application is recording audio
let showInput = false;
let recordingApps = this._control.get_source_outputs();
if (this._stream && recordingApps) {
for (let i = 0; i < recordingApps.length; i++) {
let outputStream = recordingApps[i];
let id = outputStream.get_application_id();
// but skip gnome-volume-control and pavucontrol
// (that appear as recording because they show the input level)
if (!id || (id != 'org.gnome.VolumeControl' && id != 'org.PulseAudio.pavucontrol')) {
showInput = true;
break;
}
}
}
this._showInput = showInput;
this._updateVisibility();
},
_shouldBeVisible: function() {
return this.parent() && this._showInput;
}
});
const VolumeMenu = new Lang.Class({
Name: 'VolumeMenu',
Extends: PopupMenu.PopupMenuSection,
_init: function(control) {
this.parent();
this.hasHeadphones = false;
this._control = control;
this._control.connect('state-changed', Lang.bind(this, this._onControlStateChanged));
this._control.connect('default-sink-changed', Lang.bind(this, this._readOutput));
this._control.connect('default-source-changed', Lang.bind(this, this._readInput));
this._output = new OutputStreamSlider(this._control);
this._output.connect('stream-updated', Lang.bind(this, function() {
this.emit('icon-changed');
}));
this.addMenuItem(this._output.item);
this._input = new InputStreamSlider(this._control);
this.addMenuItem(this._input.item);
this.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
this._onControlStateChanged();
},
scroll: function(event) {
return this._output.scroll(event);
},
_onControlStateChanged: function() {
if (this._control.get_state() == Gvc.MixerControlState.READY) {
this._readInput();
this._readOutput();
} else {
this.emit('icon-changed');
}
},
_readOutput: function() {
this._output.stream = this._control.get_default_sink();
},
_readInput: function() {
this._input.stream = this._control.get_default_source();
},
getIcon: function() {
return this._output.getIcon();
}
});
const Indicator = new Lang.Class({
Name: 'VolumeIndicator',
Extends: PanelMenu.SystemIndicator,
_init: function() {
this.parent();
this._primaryIndicator = this._addIndicator();
this._control = getMixerControl();
this._volumeMenu = new VolumeMenu(this._control);
this._volumeMenu.connect('icon-changed', Lang.bind(this, function(menu) {
let icon = this._volumeMenu.getIcon();
if (icon != null) {
this.indicators.show();
this._primaryIndicator.icon_name = icon;
} else {
this.indicators.hide();
}
}));
this.menu.addMenuItem(this._volumeMenu);
this.indicators.connect('scroll-event', Lang.bind(this, this._onScrollEvent));
},
_onScrollEvent: function(actor, event) {
return this._volumeMenu.scroll(event);
}
});