540 lines
16 KiB
JavaScript
540 lines
16 KiB
JavaScript
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 { HUNDRED_PERCENT, MAX_PERCENT } from '/imports/utils/slideCalcUtils';
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import PresentationToolbarContainer from './presentation-toolbar/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 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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import MediaService, { shouldEnableSwapLayout } from '../media/service';
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import PresentationCloseButton from './presentation-close-button/component';
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import DownloadPresentationButton from './download-presentation-button/component';
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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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zoom: 100,
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touchZoom: false,
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delta: {
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x: 0,
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y: 0,
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},
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fitToWidth: false,
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};
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this.getSvgRef = this.getSvgRef.bind(this);
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this.zoomChanger = this.zoomChanger.bind(this);
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this.touchUpdate = this.touchUpdate.bind(this);
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this.pointUpdate = this.pointUpdate.bind(this);
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this.fitToWidthHandler = this.fitToWidthHandler.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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getToolbarHeight() {
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const { refPresentationToolbar } = this;
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let height = 0;
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if (refPresentationToolbar) {
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const { clientHeight } = refPresentationToolbar;
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height = clientHeight;
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}
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return height;
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}
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getPresentationSizesAvailable() {
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const { userIsPresenter, multiUser } = this.props;
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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 (userIsPresenter || multiUser) {
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({ clientWidth, clientHeight } = refWhiteboardArea);
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}
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presentationSizes.presentationHeight = clientHeight - this.getToolbarHeight();
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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 { presentationHeight, presentationWidth } = this.state;
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const { currentSlide } = this.props;
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const originalWidth = currentSlide.calculatedData.width;
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const originalHeight = currentSlide.calculatedData.height;
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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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zoomChanger(incomingZoom) {
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const { zoom } = this.state;
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let newZoom = incomingZoom;
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const isDifferent = newZoom !== zoom;
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if (newZoom <= HUNDRED_PERCENT) {
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newZoom = HUNDRED_PERCENT;
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} else if (incomingZoom >= MAX_PERCENT) {
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newZoom = MAX_PERCENT;
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}
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if (isDifferent) this.setState({ zoom: newZoom });
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}
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pointUpdate(pointX, pointY) {
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this.setState({
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delta: {
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x: pointX,
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y: pointY,
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},
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});
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}
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touchUpdate(bool) {
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this.setState({
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touchZoom: bool,
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});
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}
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fitToWidthHandler() {
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const { fitToWidth } = this.state;
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this.setState({
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fitToWidth: !fitToWidth,
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});
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}
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isPresentationAccessible() {
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const { currentSlide } = this.props;
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// sometimes tomcat publishes the slide url, but the actual file is not accessible (why?)
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return currentSlide && currentSlide.calculatedData;
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}
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renderPresentationClose() {
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const { isFullscreen } = this.props;
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if (!shouldEnableSwapLayout() || isFullscreen) {
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return null;
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}
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return <PresentationCloseButton toggleSwapLayout={MediaService.toggleSwapLayout} />;
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}
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renderOverlays(slideObj, adjustedSizes) {
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const {
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userIsPresenter,
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multiUser,
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podId,
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currentSlide,
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} = this.props;
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const {
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delta,
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zoom,
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touchZoom,
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fitToWidth,
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} = this.state;
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if (!userIsPresenter && !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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podId={podId}
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currentSlideNum={currentSlide.num}
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slide={slideObj}
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whiteboardId={slideObj.id}
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slideWidth={width}
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slideHeight={height}
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delta={delta}
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viewBoxWidth={viewBoxWidth}
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viewBoxHeight={viewBoxHeight}
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zoom={zoom}
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zoomChanger={this.zoomChanger}
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adjustedSizes={adjustedSizes}
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getSvgRef={this.getSvgRef}
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presentationSize={this.getPresentationSizesAvailable()}
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touchZoom={touchZoom}
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fitToWidth={fitToWidth}
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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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pointChanger={this.pointUpdate}
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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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zoom={zoom}
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zoomChanger={this.zoomChanger}
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touchUpdate={this.touchUpdate}
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/>
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</PresentationOverlayContainer>
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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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const { fitToWidth } = this.state;
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const { podId, currentSlide } = this.props;
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if (!this.isPresentationAccessible()) return null;
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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 = 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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const svgAreaDimensions = fitToWidth
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? {
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position: 'absolute',
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width: 'inherit',
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}
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: {
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position: 'absolute',
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width: adjustedSizes.width,
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height: adjustedSizes.height,
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textAlign: 'center',
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};
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return (
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<div
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style={svgAreaDimensions}
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>
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{this.renderPresentationClose()}
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{this.renderPresentationDownload()}
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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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data-test="whiteboard"
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{...{
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width,
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height,
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}}
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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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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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{...{
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width,
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height,
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}}
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whiteboardId={slideObj.id}
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/>
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<CursorWrapperContainer
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podId={podId}
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whiteboardId={slideObj.id}
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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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radius={fitToWidth ? 2 : 5}
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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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renderPresentationToolbar() {
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const {
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currentSlide,
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podId,
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isFullscreen: propIsFullscreen,
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} = this.props;
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const { zoom } = this.state;
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const fullRef = () => this.refPresentationContainer.requestFullscreen();
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if (!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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isFullscreen={propIsFullscreen}
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fullscreenRef={fullRef}
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podId={podId}
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currentSlideNum={currentSlide.num}
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presentationId={currentSlide.presentationId}
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zoom={zoom}
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zoomChanger={this.zoomChanger}
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fitToWidthHandler={this.fitToWidthHandler}
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/>
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);
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}
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renderWhiteboardToolbar() {
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const { currentSlide } = this.props;
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if (!this.isPresentationAccessible()) return null;
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const adjustedSizes = this.calculateSize();
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return (
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<WhiteboardToolbarContainer
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whiteboardId={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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renderPresentationDownload() {
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const { presentationIsDownloadable, downloadPresentationUri } = this.props;
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if (!presentationIsDownloadable) return null;
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const handleDownloadPresentation = () => {
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window.open(downloadPresentationUri);
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};
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return (
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<DownloadPresentationButton
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handleDownloadPresentation={handleDownloadPresentation}
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dark
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/>
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);
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}
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render() {
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const { userIsPresenter, multiUser } = this.props;
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const { showSlide } = this.state;
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const adjustedSizes = this.calculateSize();
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const adjustedHeight = adjustedSizes.height;
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const adjustedWidth = adjustedSizes.width;
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const toolbarHeight = this.getToolbarHeight();
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let toolbarWidth = 0;
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if (this.refWhiteboardArea) {
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const { clientWidth: AreaWidth } = this.refWhiteboardArea;
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if (adjustedWidth < 400
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&& adjustedWidth !== AreaWidth
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&& AreaWidth > 400) {
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toolbarWidth = '400px';
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} else if (adjustedWidth === AreaWidth
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|| AreaWidth <= 400) {
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toolbarWidth = '100%';
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} else {
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toolbarWidth = adjustedWidth;
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}
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}
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return (
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<div
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ref={(ref) => { this.refPresentationContainer = ref; }}
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className={styles.presentationContainer}
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>
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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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<div
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className={styles.svgContainer}
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style={{
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height: adjustedHeight + toolbarHeight,
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}}
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>
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{showSlide
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? this.renderPresentationArea()
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: null}
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{userIsPresenter || multiUser
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? this.renderWhiteboardToolbar()
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: null}
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{userIsPresenter || multiUser
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? (
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<div
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className={styles.presentationToolbar}
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ref={(ref) => { this.refPresentationToolbar = ref; }}
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style={
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{
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width: toolbarWidth,
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}
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}
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>
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{this.renderPresentationToolbar()}
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</div>
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)
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: null}
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</div>
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</div>
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</div>
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);
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}
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}
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export default PresentationArea;
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PresentationArea.propTypes = {
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podId: PropTypes.string.isRequired,
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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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