jiti-meet/react/features/filmstrip/components/native/TileView.js

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// @flow
import React, { Component } from 'react';
import {
ScrollView,
TouchableWithoutFeedback,
View
} from 'react-native';
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import type { Dispatch } from 'redux';
import {
getNearestReceiverVideoQualityLevel,
setMaxReceiverVideoQuality
} from '../../../base/conference';
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import { connect } from '../../../base/redux';
import {
DimensionsDetector,
isNarrowAspectRatio,
makeAspectRatioAware
} from '../../../base/responsive-ui';
import Thumbnail from './Thumbnail';
import styles from './styles';
/**
* The type of the React {@link Component} props of {@link TileView}.
*/
type Props = {
/**
* The participants in the conference.
*/
_participants: Array<Object>,
/**
* Invoked to update the receiver video quality.
*/
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dispatch: Dispatch<any>,
/**
* Callback to invoke when tile view is tapped.
*/
onClick: Function
};
/**
* The type of the React {@link Component} state of {@link TileView}.
*/
type State = {
/**
* The available width for {@link TileView} to occupy.
*/
height: number,
/**
* The available height for {@link TileView} to occupy.
*/
width: number
};
/**
* The margin for each side of the tile view. Taken away from the available
* height and width for the tile container to display in.
*
* @private
* @type {number}
*/
const MARGIN = 10;
/**
* The aspect ratio the tiles should display in.
*
* @private
* @type {number}
*/
const TILE_ASPECT_RATIO = 1;
/**
* Implements a React {@link Component} which displays thumbnails in a two
* dimensional grid.
*
* @extends Component
*/
class TileView extends Component<Props, State> {
state = {
height: 0,
width: 0
};
/**
* Initializes a new {@code TileView} instance.
*
* @param {Object} props - The read-only properties with which the new
* instance is to be initialized.
*/
constructor(props: Props) {
super(props);
// Bind event handler so it is only bound once per instance.
this._onDimensionsChanged = this._onDimensionsChanged.bind(this);
}
/**
* Implements React's {@link Component#componentDidMount}.
*
* @inheritdoc
*/
componentDidMount() {
this._updateReceiverQuality();
}
/**
* Implements React's {@link Component#componentDidUpdate}.
*
* @inheritdoc
*/
componentDidUpdate() {
this._updateReceiverQuality();
}
/**
* Implements React's {@link Component#render()}.
*
* @inheritdoc
* @returns {ReactElement}
*/
render() {
const { onClick } = this.props;
const { height, width } = this.state;
const rowElements = this._groupIntoRows(
this._renderThumbnails(), this._getColumnCount());
return (
<DimensionsDetector
onDimensionsChanged = { this._onDimensionsChanged }>
<ScrollView
style = {{
...styles.tileView,
height,
width
}}>
<TouchableWithoutFeedback onPress = { onClick }>
<View
style = {{
...styles.tileViewRows,
minHeight: height,
minWidth: width
}}>
{ rowElements }
</View>
</TouchableWithoutFeedback>
</ScrollView>
</DimensionsDetector>
);
}
/**
* Returns how many columns should be displayed for tile view.
*
* @returns {number}
* @private
*/
_getColumnCount() {
const participantCount = this.props._participants.length;
// For narrow view, tiles should stack on top of each other for a lonely
// call and a 1:1 call. Otherwise tiles should be grouped into rows of
// two.
if (isNarrowAspectRatio(this)) {
return participantCount >= 3 ? 2 : 1;
}
if (participantCount === 4) {
// In wide view, a four person call should display as a 2x2 grid.
return 2;
}
return Math.min(3, participantCount);
}
/**
* Returns all participants with the local participant at the end.
*
* @private
* @returns {Participant[]}
*/
_getSortedParticipants() {
const participants = [];
let localParticipant;
for (const participant of this.props._participants) {
if (participant.local) {
localParticipant = participant;
} else {
participants.push(participant);
}
}
localParticipant && participants.push(localParticipant);
return participants;
}
/**
* Calculate the height and width for the tiles.
*
* @private
* @returns {Object}
*/
_getTileDimensions() {
const { _participants } = this.props;
const { height, width } = this.state;
const columns = this._getColumnCount();
const participantCount = _participants.length;
const heightToUse = height - (MARGIN * 2);
const widthToUse = width - (MARGIN * 2);
let tileWidth;
// If there is going to be at least two rows, ensure that at least two
// rows display fully on screen.
if (participantCount / columns > 1) {
tileWidth
= Math.min(widthToUse / columns, heightToUse / 2);
} else {
tileWidth = Math.min(widthToUse / columns, heightToUse);
}
return {
height: tileWidth / TILE_ASPECT_RATIO,
width: tileWidth
};
}
/**
* Splits a list of thumbnails into React Elements with a maximum of
* {@link rowLength} thumbnails in each.
*
* @param {Array} thumbnails - The list of thumbnails that should be split
* into separate row groupings.
* @param {number} rowLength - How many thumbnails should be in each row.
* @private
* @returns {ReactElement[]}
*/
_groupIntoRows(thumbnails, rowLength) {
const rowElements = [];
for (let i = 0; i < thumbnails.length; i++) {
if (i % rowLength === 0) {
const thumbnailsInRow
= thumbnails.slice(i, i + rowLength);
rowElements.push(
<View
key = { rowElements.length }
style = { styles.tileViewRow }>
{ thumbnailsInRow }
</View>
);
}
}
return rowElements;
}
_onDimensionsChanged: (width: number, height: number) => void;
/**
* Updates the known available state for {@link TileView} to occupy.
*
* @param {number} width - The component's current width.
* @param {number} height - The component's current height.
* @private
* @returns {void}
*/
_onDimensionsChanged(width: number, height: number) {
this.setState({
height,
width
});
}
/**
* Creates React Elements to display each participant in a thumbnail. Each
* tile will be.
*
* @private
* @returns {ReactElement[]}
*/
_renderThumbnails() {
const styleOverrides = {
aspectRatio: TILE_ASPECT_RATIO,
flex: 0,
height: this._getTileDimensions().height,
width: null
};
return this._getSortedParticipants()
.map(participant => (
<Thumbnail
disablePin = { true }
disableTint = { true }
key = { participant.id }
participant = { participant }
renderDisplayName = { true }
styleOverrides = { styleOverrides } />));
}
/**
* Sets the receiver video quality based on the dimensions of the thumbnails
* that are displayed.
*
* @private
* @returns {void}
*/
_updateReceiverQuality() {
const { height } = this._getTileDimensions();
const qualityLevel = getNearestReceiverVideoQualityLevel(height);
this.props.dispatch(setMaxReceiverVideoQuality(qualityLevel));
}
}
/**
* Maps (parts of) the redux state to the associated {@code TileView}'s props.
*
* @param {Object} state - The redux state.
* @private
* @returns {{
* _participants: Participant[]
* }}
*/
function _mapStateToProps(state) {
return {
_participants: state['features/base/participants']
};
}
export default connect(_mapStateToProps)(makeAspectRatioAware(TileView));