initial commit

.local/share/gnome-shell/extensions/gsconnect@andyholmes.github.io/service/plugins/systemvolume.js

@@ -0,0 +1,200 @@
+'use strict';
+
+const GObject = imports.gi.GObject;
+
+const Components = imports.service.components;
+const Config = imports.config;
+const PluginBase = imports.service.plugin;
+
+
+var Metadata = {
+    label: _('System Volume'),
+    description: _('Enable the paired device to control the system volume'),
+    id: 'org.gnome.Shell.Extensions.GSConnect.Plugin.SystemVolume',
+    incomingCapabilities: ['kdeconnect.systemvolume.request'],
+    outgoingCapabilities: ['kdeconnect.systemvolume'],
+    actions: {},
+};
+
+
+/**
+ * SystemVolume Plugin
+ * https://github.com/KDE/kdeconnect-kde/tree/master/plugins/systemvolume
+ * https://github.com/KDE/kdeconnect-android/tree/master/src/org/kde/kdeconnect/Plugins/SystemvolumePlugin/
+ */
+var Plugin = GObject.registerClass({
+    GTypeName: 'GSConnectSystemVolumePlugin',
+}, class Plugin extends PluginBase.Plugin {
+
+    _init(device) {
+        super._init(device, 'systemvolume');
+
+        // Cache stream properties
+        this._cache = new WeakMap();
+
+        // Connect to the mixer
+        try {
+            this._mixer = Components.acquire('pulseaudio');
+
+            this._streamChangedId = this._mixer.connect(
+                'stream-changed',
+                this._sendSink.bind(this)
+            );
+
+            this._outputAddedId = this._mixer.connect(
+                'output-added',
+                this._sendSinkList.bind(this)
+            );
+
+            this._outputRemovedId = this._mixer.connect(
+                'output-removed',
+                this._sendSinkList.bind(this)
+            );
+
+        // Modify the error to redirect to the wiki
+        } catch (e) {
+            e.name = _('PulseAudio not found');
+            e.url = `${Config.PACKAGE_URL}/wiki/Error#pulseaudio-not-found`;
+            throw e;
+        }
+    }
+
+    handlePacket(packet) {
+        switch (true) {
+            case packet.body.hasOwnProperty('requestSinks'):
+                this._sendSinkList();
+                break;
+
+            case packet.body.hasOwnProperty('name'):
+                this._changeSink(packet);
+                break;
+        }
+    }
+
+    connected() {
+        super.connected();
+
+        this._sendSinkList();
+    }
+
+    /**
+     * Handle a request to change an output
+     *
+     * @param {Core.Packet} packet - a `kdeconnect.systemvolume.request`
+     */
+    _changeSink(packet) {
+        let stream;
+
+        for (const sink of this._mixer.get_sinks()) {
+            if (sink.name === packet.body.name) {
+                stream = sink;
+                break;
+            }
+        }
+
+        // No sink with the given name
+        if (stream === undefined) {
+            this._sendSinkList();
+            return;
+        }
+
+        // Get a cache and store volume and mute states if changed
+        const cache = this._cache.get(stream) || {};
+
+        if (packet.body.hasOwnProperty('muted')) {
+            cache.muted = packet.body.muted;
+            this._cache.set(stream, cache);
+            stream.change_is_muted(packet.body.muted);
+        }
+
+        if (packet.body.hasOwnProperty('volume')) {
+            cache.volume = packet.body.volume;
+            this._cache.set(stream, cache);
+            stream.volume = packet.body.volume;
+            stream.push_volume();
+        }
+    }
+
+    /**
+     * Update the cache for @stream
+     *
+     * @param {Gvc.MixerStream} stream - The stream to cache
+     * @return {Object} The updated cache object
+     */
+    _updateCache(stream) {
+        const state = {
+            name: stream.name,
+            description: stream.display_name,
+            muted: stream.is_muted,
+            volume: stream.volume,
+            maxVolume: this._mixer.get_vol_max_norm(),
+        };
+
+        this._cache.set(stream, state);
+
+        return state;
+    }
+
+    /**
+     * Send the state of a local sink
+     *
+     * @param {Gvc.MixerControl} mixer - The mixer that owns the stream
+     * @param {number} id - The Id of the stream that changed
+     */
+    _sendSink(mixer, id) {
+        // Avoid starving the packet channel when fading
+        if (this._mixer.fading)
+            return;
+
+        // Check the cache
+        const stream = this._mixer.lookup_stream_id(id);
+        const cache = this._cache.get(stream) || {};
+
+        // If the port has changed we have to send the whole list to update the
+        // display name
+        if (!cache.display_name || cache.display_name !== stream.display_name) {
+            this._sendSinkList();
+            return;
+        }
+
+        // If only volume and/or mute are set, send a single update
+        if (cache.volume !== stream.volume || cache.muted !== stream.is_muted) {
+            // Update the cache
+            const state = this._updateCache(stream);
+
+            // Send the stream update
+            this.device.sendPacket({
+                type: 'kdeconnect.systemvolume',
+                body: state,
+            });
+        }
+    }
+
+    /**
+     * Send a list of local sinks
+     */
+    _sendSinkList() {
+        const sinkList = this._mixer.get_sinks().map(sink => {
+            return this._updateCache(sink);
+        });
+
+        // Send the sinkList
+        this.device.sendPacket({
+            type: 'kdeconnect.systemvolume',
+            body: {
+                sinkList: sinkList,
+            },
+        });
+    }
+
+    destroy() {
+        if (this._mixer !== undefined) {
+            this._mixer.disconnect(this._streamChangedId);
+            this._mixer.disconnect(this._outputAddedId);
+            this._mixer.disconnect(this._outputRemovedId);
+            this._mixer = Components.release('pulseaudio');
+        }
+
+        super.destroy();
+    }
+});