336 lines
10 KiB
JavaScript
Executable File
336 lines
10 KiB
JavaScript
Executable File
import React, { Component } from 'react';
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import PropTypes from 'prop-types';
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import { TransitionGroup, CSSTransition } from 'react-transition-group';
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import WhiteboardOverlayContainer from '/imports/ui/components/whiteboard/whiteboard-overlay/container';
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import WhiteboardToolbarContainer from '/imports/ui/components/whiteboard/whiteboard-toolbar/container';
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import PollingContainer from '/imports/ui/components/polling/container';
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import CursorWrapperContainer from './cursor/cursor-wrapper-container/container';
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import AnnotationGroupContainer from '../whiteboard/annotation-group/container';
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import PresentationToolbarContainer from './presentation-toolbar/container';
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import PresentationOverlayContainer from './presentation-overlay/container';
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import Slide from './slide/component';
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import styles from './styles.scss';
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export default class PresentationArea extends Component {
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constructor() {
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super();
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this.state = {
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presentationWidth: 0,
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presentationHeight: 0,
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showSlide: false,
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};
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this.getSvgRef = this.getSvgRef.bind(this);
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}
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componentDidMount() {
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// adding an event listener to scale the whiteboard on 'resize' events sent by chat/userlist etc
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window.addEventListener('resize', () => {
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setTimeout(this.handleResize.bind(this), 0);
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});
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this.getInitialPresentationSizes();
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}
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componentWillUnmount() {
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window.removeEventListener('resize', () => {
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setTimeout(this.handleResize.bind(this), 0);
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});
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}
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// returns a ref to the svg element, which is required by a WhiteboardOverlay
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// to transform screen coordinates to svg coordinate system
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getSvgRef() {
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return this.svggroup;
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}
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getPresentationSizesAvailable() {
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const { refPresentationArea, refWhiteboardArea } = this;
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const presentationSizes = {};
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if (refPresentationArea && refWhiteboardArea) {
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// By default presentation sizes are equal to the sizes of the refPresentationArea
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// direct parent of the svg wrapper
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let { clientWidth, clientHeight } = refPresentationArea;
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// if a user is a presenter - this means there is a whiteboard toolbar on the right
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// and we have to get the width/height of the refWhiteboardArea
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// (inner hidden div with absolute position)
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if (this.props.userIsPresenter || this.props.multiUser) {
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({ clientWidth, clientHeight } = refWhiteboardArea);
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}
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presentationSizes.presentationHeight = clientHeight;
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presentationSizes.presentationWidth = clientWidth;
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}
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return presentationSizes;
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}
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getInitialPresentationSizes() {
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// determining the presentationWidth and presentationHeight (available space for the svg)
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// on the initial load
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const presentationSizes = this.getPresentationSizesAvailable();
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if (Object.keys(presentationSizes).length > 0) {
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// setting the state of the available space for the svg
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// and set the showSlide to true to start rendering the slide
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this.setState({
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presentationHeight: presentationSizes.presentationHeight,
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presentationWidth: presentationSizes.presentationWidth,
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showSlide: true,
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});
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}
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}
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handleResize() {
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const presentationSizes = this.getPresentationSizesAvailable();
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if (Object.keys(presentationSizes).length > 0) {
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// updating the size of the space available for the slide
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this.setState(presentationSizes);
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}
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}
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calculateSize() {
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const originalWidth = this.props.currentSlide.calculatedData.width;
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const originalHeight = this.props.currentSlide.calculatedData.height;
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const { presentationHeight, presentationWidth } = this.state;
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let adjustedWidth;
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let adjustedHeight;
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// Slide has a portrait orientation
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if (originalWidth <= originalHeight) {
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adjustedWidth = (presentationHeight * originalWidth) / originalHeight;
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if (presentationWidth < adjustedWidth) {
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adjustedHeight = (presentationHeight * presentationWidth) / adjustedWidth;
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adjustedWidth = presentationWidth;
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} else {
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adjustedHeight = presentationHeight;
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}
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// Slide has a landscape orientation
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} else {
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adjustedHeight = (presentationWidth * originalHeight) / originalWidth;
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if (presentationHeight < adjustedHeight) {
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adjustedWidth = (presentationWidth * presentationHeight) / adjustedHeight;
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adjustedHeight = presentationHeight;
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} else {
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adjustedWidth = presentationWidth;
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}
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}
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return {
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width: adjustedWidth,
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height: adjustedHeight,
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};
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}
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// renders the whole presentation area
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renderPresentationArea() {
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// sometimes tomcat publishes the slide url, but the actual file is not accessible (why?)
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if (!this.props.currentSlide ||
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!this.props.currentSlide.calculatedData) {
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return null;
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}
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// to control the size of the svg wrapper manually
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// and adjust cursor's thickness, so that svg didn't scale it automatically
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const adjustedSizes = this.calculateSize();
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// a reference to the slide object
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const slideObj = this.props.currentSlide;
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// retrieving the pre-calculated data from the slide object
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const {
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x,
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y,
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width,
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height,
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viewBoxWidth,
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viewBoxHeight,
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imageUri,
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} = slideObj.calculatedData;
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return (
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<div
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style={{
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width: adjustedSizes.width,
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height: adjustedSizes.height,
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WebkitTransition: 'width 0.2s', /* Safari */
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transition: 'width 0.2s',
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}}
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>
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<TransitionGroup>
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<CSSTransition
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key={slideObj.id}
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classNames={{
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enter: styles.enter,
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enterActive: styles.enterActive,
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appear: styles.appear,
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appearActive: styles.appearActive,
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}}
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appear
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enter
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exit={false}
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timeout={{ enter: 400 }}
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>
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<svg
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width={width}
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height={height}
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ref={(ref) => { if (ref != null) { this.svggroup = ref; } }}
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viewBox={`${x} ${y} ${viewBoxWidth} ${viewBoxHeight}`}
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version="1.1"
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xmlns="http://www.w3.org/2000/svg"
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className={styles.svgStyles}
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>
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<defs>
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<clipPath id="viewBox">
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<rect x={x} y={y} width="100%" height="100%" fill="none" />
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</clipPath>
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</defs>
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<g clipPath="url(#viewBox)">
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<Slide
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id="slideComponent"
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imageUri={imageUri}
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svgWidth={width}
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svgHeight={height}
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/>
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<AnnotationGroupContainer
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width={width}
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height={height}
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whiteboardId={slideObj.id}
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/>
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<CursorWrapperContainer
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widthRatio={slideObj.widthRatio}
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physicalWidthRatio={adjustedSizes.width / width}
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slideWidth={width}
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slideHeight={height}
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/>
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</g>
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{this.renderOverlays(slideObj, adjustedSizes)}
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</svg>
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</CSSTransition>
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</TransitionGroup>
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</div>
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);
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}
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renderOverlays(slideObj, adjustedSizes) {
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if (!this.props.userIsPresenter && !this.props.multiUser) {
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return null;
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}
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// retrieving the pre-calculated data from the slide object
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const {
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x,
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y,
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width,
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height,
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viewBoxWidth,
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viewBoxHeight,
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} = slideObj.calculatedData;
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return (
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<PresentationOverlayContainer
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slideWidth={width}
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slideHeight={height}
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getSvgRef={this.getSvgRef}
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>
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<WhiteboardOverlayContainer
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getSvgRef={this.getSvgRef}
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whiteboardId={slideObj.id}
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slideWidth={width}
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slideHeight={height}
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viewBoxX={x}
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viewBoxY={y}
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viewBoxWidth={viewBoxWidth}
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viewBoxHeight={viewBoxHeight}
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physicalSlideWidth={(adjustedSizes.width / slideObj.widthRatio) * 100}
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physicalSlideHeight={(adjustedSizes.height / slideObj.heightRatio) * 100}
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/>
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</PresentationOverlayContainer>
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);
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}
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renderPresentationToolbar() {
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if (!this.props.currentSlide) {
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return null;
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}
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return (
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<PresentationToolbarContainer
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currentSlideNum={this.props.currentSlide.num}
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presentationId={this.props.currentSlide.presentationId}
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/>
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);
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}
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renderWhiteboardToolbar() {
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if (!this.props.currentSlide ||
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!this.props.currentSlide.calculatedData) {
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return null;
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}
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const adjustedSizes = this.calculateSize();
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return (
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<WhiteboardToolbarContainer
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whiteboardId={this.props.currentSlide.id}
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height={adjustedSizes.height}
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/>
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);
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}
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render() {
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return (
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<div className={styles.presentationContainer}>
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<div
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ref={(ref) => { this.refPresentationArea = ref; }}
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className={styles.presentationArea}
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>
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<div
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ref={(ref) => { this.refWhiteboardArea = ref; }}
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className={styles.whiteboardSizeAvailable}
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/>
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{this.state.showSlide ?
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this.renderPresentationArea()
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: null }
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{this.props.userIsPresenter || this.props.multiUser ?
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this.renderWhiteboardToolbar()
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: null }
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</div>
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<PollingContainer />
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{this.renderPresentationToolbar()}
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</div>
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);
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}
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}
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PresentationArea.propTypes = {
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// Defines a boolean value to detect whether a current user is a presenter
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userIsPresenter: PropTypes.bool.isRequired,
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currentSlide: PropTypes.shape({
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presentationId: PropTypes.string.isRequired,
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current: PropTypes.bool.isRequired,
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heightRatio: PropTypes.number.isRequired,
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widthRatio: PropTypes.number.isRequired,
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xOffset: PropTypes.number.isRequired,
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yOffset: PropTypes.number.isRequired,
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num: PropTypes.number.isRequired,
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id: PropTypes.string.isRequired,
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calculatedData: PropTypes.shape({
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x: PropTypes.number.isRequired,
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y: PropTypes.number.isRequired,
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height: PropTypes.number.isRequired,
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width: PropTypes.number.isRequired,
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viewBoxWidth: PropTypes.number.isRequired,
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viewBoxHeight: PropTypes.number.isRequired,
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imageUri: PropTypes.string.isRequired,
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}),
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}),
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// current multi-user status
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multiUser: PropTypes.bool.isRequired,
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};
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PresentationArea.defaultProps = {
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currentSlide: undefined,
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};
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