128 lines
5.0 KiB
JavaScript
128 lines
5.0 KiB
JavaScript
import React, { Component } from 'react';
|
|
import { View } from 'react-native';
|
|
import { RTCView } from 'react-native-webrtc';
|
|
|
|
import { Platform } from '../../../react';
|
|
|
|
import { styles } from './styles';
|
|
|
|
/**
|
|
* Indicates whether RTCView (is to be considered that it) natively supports
|
|
* i.e. implements mirroring the video it renders. If false, a workaround will
|
|
* be used in an attempt to support mirroring in Video. If RTCView does not
|
|
* implement mirroring on a specific platform but the workaround causes issues,
|
|
* set to true for that platform to disable the workaround.
|
|
*/
|
|
const RTCVIEW_SUPPORTS_MIRROR = Platform.OS === 'android';
|
|
|
|
/**
|
|
* The React Native component which is similar to Web's video element and wraps
|
|
* around react-native-webrtc's RTCView.
|
|
*/
|
|
export class Video extends Component {
|
|
/**
|
|
* Video component's property types.
|
|
*
|
|
* @static
|
|
*/
|
|
static propTypes = {
|
|
mirror: React.PropTypes.bool,
|
|
muted: React.PropTypes.bool,
|
|
onPlaying: React.PropTypes.func,
|
|
stream: React.PropTypes.object,
|
|
|
|
/**
|
|
* Similarly to the CSS property z-index, specifies the z-order of this
|
|
* Video in the stacking space of all Videos. When Videos overlap,
|
|
* zOrder determines which one covers the other. A Video with a larger
|
|
* zOrder generally covers a Video with a lower one.
|
|
*
|
|
* Non-overlapping Videos may safely share a z-order (because one does
|
|
* not have to cover the other).
|
|
*
|
|
* The support for zOrder is platform-dependent and/or
|
|
* implementation-specific. Thus, specifying a value for zOrder is to be
|
|
* thought of as giving a hint rather than as imposing a requirement.
|
|
* For example, video renderers such as Video are commonly implemented
|
|
* using OpenGL and OpenGL views may have different numbers of layers in
|
|
* their stacking space. Android has three: a layer bellow the window
|
|
* (aka default), a layer bellow the window again but above the previous
|
|
* layer (aka media overlay), and above the window. Consequently, it is
|
|
* advisable to limit the number of utilized layers in the stacking
|
|
* space to the minimum sufficient for the desired display. For example,
|
|
* a video call application usually needs a maximum of two zOrder
|
|
* values: 0 for the remote video(s) which appear in the background, and
|
|
* 1 for the local video(s) which appear above the remote video(s).
|
|
*/
|
|
zOrder: React.PropTypes.number
|
|
}
|
|
|
|
/**
|
|
* React Component method that executes once component is mounted.
|
|
*
|
|
* @inheritdoc
|
|
*/
|
|
componentDidMount() {
|
|
// RTCView currently does not support media events, so just fire
|
|
// onPlaying callback when <RTCView> is rendered.
|
|
if (this.props.onPlaying) {
|
|
this.props.onPlaying();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements React's {@link Component#render()}.
|
|
*
|
|
* @inheritdoc
|
|
* @returns {ReactElement|null}
|
|
*/
|
|
render() {
|
|
const stream = this.props.stream;
|
|
|
|
if (stream) {
|
|
const streamURL = stream.toURL();
|
|
|
|
// XXX The CSS style object-fit that we utilize on Web is not
|
|
// supported on React Native. Adding objectFit to React Native's
|
|
// StyleSheet appears to be impossible without hacking and an
|
|
// unjustified amount of effort. Consequently, I've chosen to define
|
|
// objectFit on RTCView itself. Anyway, prepare to accommodate a
|
|
// future definition of objectFit in React Native's StyleSheet.
|
|
const style = styles.video;
|
|
const objectFit = (style && style.objectFit) || 'cover';
|
|
|
|
const mirror = this.props.mirror;
|
|
|
|
// XXX RTCView doesn't currently support mirroring, even when
|
|
// providing a transform style property. As a workaround, wrap the
|
|
// RTCView inside another View and apply the transform style
|
|
// property to that View instead.
|
|
const mirrorWorkaround = mirror && !RTCVIEW_SUPPORTS_MIRROR;
|
|
|
|
// eslint-disable-next-line no-extra-parens
|
|
const video = (
|
|
<RTCView
|
|
mirror = { !mirrorWorkaround }
|
|
objectFit = { objectFit }
|
|
streamURL = { streamURL }
|
|
style = { style }
|
|
zOrder = { this.props.zOrder } />
|
|
);
|
|
|
|
if (mirrorWorkaround) {
|
|
return (
|
|
<View style = { styles.mirroredVideo }>{ video }</View>
|
|
);
|
|
}
|
|
|
|
return video;
|
|
}
|
|
|
|
// RTCView has peculiarities which may or may not be platform specific.
|
|
// For example, it doesn't accept an empty streamURL. If the execution
|
|
// reached here, it means that we explicitly chose to not initialize an
|
|
// RTCView as a way of dealing with its idiosyncrasies.
|
|
return null;
|
|
}
|
|
}
|