feat(prejoin_page) Add settings buttons

This reverts commit faf24ca7ec.

react/features/settings/components/web/audio/MicrophoneEntry.js

@@ -0,0 +1,172 @@
+// @flow
+
+import React, { Component } from 'react';
+
+import AudioSettingsEntry, { type Props as AudioSettingsEntryProps } from './AudioSettingsEntry';
+import JitsiMeetJS from '../../../../base/lib-jitsi-meet/_';
+import Meter from './Meter';
+
+const JitsiTrackEvents = JitsiMeetJS.events.track;
+
+type Props = AudioSettingsEntryProps & {
+
+    /**
+     * The deviceId of the microphone.
+     */
+    deviceId: string,
+
+    /**
+     * Flag indicating if there is a problem with the device.
+     */
+    hasError?: boolean,
+
+    /**
+     * The audio track for the current entry.
+     */
+    jitsiTrack: Object,
+
+    /**
+     * Click handler for component.
+     */
+    onClick: Function,
+}
+
+type State = {
+
+    /**
+     * The audio level.
+     */
+    level: number,
+}
+
+/**
+ * React {@code Component} representing an entry for the microphone audio settings.
+ *
+ * @param {Props} props - The props of the component.
+ * @returns { ReactElement}
+ */
+export default class MicrophoneEntry extends Component<Props, State> {
+    /**
+     * Initializes a new {@code MicrophoneEntry} instance.
+     *
+     * @param {Object} props - The read-only properties with which the new
+     * instance is to be initialized.
+     */
+    constructor(props: Props) {
+        super(props);
+
+        this.state = {
+            level: -1
+        };
+        this._onClick = this._onClick.bind(this);
+        this._updateLevel = this._updateLevel.bind(this);
+    }
+
+    _onClick: () => void;
+
+    /**
+     * Click handler for the entry.
+     *
+     * @returns {void}
+     */
+    _onClick() {
+        this.props.onClick(this.props.deviceId);
+    }
+
+    _updateLevel: (number) => void;
+
+    /**
+     * Updates the level of the meter.
+     *
+     * @param {number} num - The audio level provided by the jitsiTrack.
+     * @returns {void}
+     */
+    _updateLevel(num) {
+        this.setState({
+            level: Math.floor(num / 0.125)
+        });
+    }
+
+    /**
+     * Subscribes to audio level chanages comming from the jitsiTrack.
+     *
+     * @returns {void}
+     */
+    _startListening() {
+        const { jitsiTrack } = this.props;
+
+        jitsiTrack && jitsiTrack.on(
+            JitsiTrackEvents.TRACK_AUDIO_LEVEL_CHANGED,
+            this._updateLevel);
+    }
+
+    /**
+     * Unsubscribes from chanages comming from the jitsiTrack.
+     *
+     * @param {Object} jitsiTrack - The jitsiTrack to unsubscribe from.
+     * @returns {void}
+     */
+    _stopListening(jitsiTrack) {
+        jitsiTrack && jitsiTrack.off(
+            JitsiTrackEvents.TRACK_AUDIO_LEVEL_CHANGED,
+            this._updateLevel);
+        this.setState({
+            level: -1
+        });
+    }
+
+    /**
+     * Implements React's {@link Component#componentDidUpdate}.
+     *
+     * @inheritdoc
+     */
+    componentDidUpdate(prevProps: Props) {
+        if (prevProps.jitsiTrack !== this.props.jitsiTrack) {
+            this._stopListening(prevProps.jitsiTrack);
+            this._startListening();
+        }
+    }
+
+    /**
+     * Implements React's {@link Component#componentDidMount}.
+     *
+     * @inheritdoc
+     */
+    componentDidMount() {
+        this._startListening();
+    }
+
+    /**
+     * Implements React's {@link Component#componentWillUnmount}.
+     *
+     * @inheritdoc
+     */
+    compmonentWillUnmount() {
+        this._stopListening(this.props.jitsiTrack);
+    }
+
+    /**
+     * Implements React's {@link Component#render}.
+     *
+     * @inheritdoc
+     */
+    render() {
+        const { children, hasError, isSelected } = this.props;
+
+        return (
+            <div
+                className = 'audio-preview-microphone'
+                onClick = { this._onClick }>
+                <AudioSettingsEntry
+                    hasError = { hasError }
+                    isSelected = { isSelected }>
+                    {children}
+                </AudioSettingsEntry>
+                <Meter
+                    className = 'audio-preview-meter-mic'
+                    isDisabled = { hasError }
+                    level = { this.state.level } />
+            </div>
+        );
+    }
+}