/* Copyright 2015, 2016 OpenMarket Ltd Copyright 2019 Michael Telatynski <7t3chguy@gmail.com> Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ import React, { createRef } from 'react'; import PropTypes from 'prop-types'; import { _t } from '../../../languageHandler'; import AccessibleTooltipButton from "./AccessibleTooltipButton"; import {Key} from "../../../Keyboard"; import FocusLock from "react-focus-lock"; import MemberAvatar from "../avatars/MemberAvatar"; import {ContextMenuTooltipButton} from "../../../accessibility/context_menu/ContextMenuTooltipButton"; import MessageContextMenu from "../context_menus/MessageContextMenu"; import {aboveLeftOf, ContextMenu} from '../../structures/ContextMenu'; import MessageTimestamp from "../messages/MessageTimestamp"; import SettingsStore from "../../../settings/SettingsStore"; import {formatFullDate} from "../../../DateUtils"; import dis from '../../../dispatcher/dispatcher'; import {replaceableComponent} from "../../../utils/replaceableComponent"; const MIN_ZOOM = 100; const MAX_ZOOM = 300; // This is used for the buttons const ZOOM_STEP = 10; // This is used for mouse wheel events const ZOOM_COEFFICIENT = 10; @replaceableComponent("views.elements.ImageView") export default class ImageView extends React.Component { static propTypes = { src: PropTypes.string.isRequired, // the source of the image being displayed name: PropTypes.string, // the main title ('name') for the image link: PropTypes.string, // the link (if any) applied to the name of the image width: PropTypes.number, // width of the image src in pixels height: PropTypes.number, // height of the image src in pixels fileSize: PropTypes.number, // size of the image src in bytes onFinished: PropTypes.func.isRequired, // callback when the lightbox is dismissed // the event (if any) that the Image is displaying. Used for event-specific stuff like // redactions, senders, timestamps etc. Other descriptors are taken from the explicit // properties above, which let us use lightboxes to display images which aren't associated // with events. mxEvent: PropTypes.object, permalinkCreator: PropTypes.object, }; constructor(props) { super(props); this.state = { rotation: 0, zoom: MIN_ZOOM, translationX: 0, translationY: 0, moving: false, contextMenuDisplayed: false, }; } contextMenuButton = createRef(); initX = 0; initY = 0; lastX = 0; lastY = 0; previousX = 0; previousY = 0; componentDidMount() { // We have to use addEventListener() because the listener // needs to be passive in order to work with Chromium this.focusLock.addEventListener('wheel', this.onWheel, { passive: false }); } componentWillUnmount() { this.focusLock.removeEventListener('wheel', this.onWheel); } onKeyDown = (ev) => { if (ev.key === Key.ESCAPE) { ev.stopPropagation(); ev.preventDefault(); this.props.onFinished(); } }; onWheel = (ev) => { ev.stopPropagation(); ev.preventDefault(); const newZoom = this.state.zoom - (ev.deltaY * ZOOM_COEFFICIENT); if (newZoom <= MIN_ZOOM) { this.setState({ zoom: MIN_ZOOM, translationX: 0, translationY: 0, }); return; } if (newZoom >= MAX_ZOOM) { this.setState({zoom: MAX_ZOOM}); return; } this.setState({ zoom: newZoom, }); } onRotateCounterClockwiseClick = () => { const cur = this.state.rotation; const rotationDegrees = (cur - 90) % 360; this.setState({ rotation: rotationDegrees }); }; onRotateClockwiseClick = () => { const cur = this.state.rotation; const rotationDegrees = (cur + 90) % 360; this.setState({ rotation: rotationDegrees }); }; onZoomInClick = () => { if (this.state.zoom >= MAX_ZOOM) { this.setState({zoom: MAX_ZOOM}); return; } this.setState({ zoom: this.state.zoom + ZOOM_STEP, }); }; onZoomOutClick = () => { if (this.state.zoom <= MIN_ZOOM) { this.setState({ zoom: MIN_ZOOM, translationX: 0, translationY: 0, }); return; } this.setState({ zoom: this.state.zoom - ZOOM_STEP, }); } onDownloadClick = () => { const a = document.createElement("a"); a.href = this.props.src; a.download = this.props.name; a.click(); } onOpenContextMenu = () => { this.setState({ contextMenuDisplayed: true, }); } onCloseContextMenu = () => { this.setState({ contextMenuDisplayed: false, }); } onPermalinkClicked = (ev) => { // This allows the permalink to be opened in a new tab/window or copied as // matrix.to, but also for it to enable routing within Element when clicked. ev.preventDefault(); dis.dispatch({ action: 'view_room', event_id: this.props.mxEvent.getId(), highlighted: true, room_id: this.props.mxEvent.getRoomId(), }); this.props.onFinished(); }; onStartMoving = (ev) => { ev.stopPropagation(); ev.preventDefault(); this.setState({moving: true}); this.previousX = this.state.translationX; this.previousY = this.state.translationY; this.initX = ev.pageX - this.lastX; this.initY = ev.pageY - this.lastY; } onMoving = (ev) => { ev.stopPropagation(); ev.preventDefault(); if (!this.state.moving) return false; this.lastX = ev.pageX - this.initX; this.lastY = ev.pageY - this.initY; this.setState({ translationX: this.lastX, translationY: this.lastY, }); } onEndMoving = () => { // Zoom in or out if we haven't moved much if ( this.state.moving === true && Math.abs(this.state.translationX - this.previousX) < 10 && Math.abs(this.state.translationY - this.previousY) < 10 ) { if (this.state.zoom === MIN_ZOOM) { this.setState({zoom: MAX_ZOOM}); } else { this.setState({ zoom: MIN_ZOOM, translationX: 0, translationY: 0, }); } } this.setState({moving: false}); } renderContextMenu() { let contextMenu = null; if (this.state.contextMenuDisplayed) { contextMenu = ( ); } return ( { contextMenu } ); } render() { const showEventMeta = !!this.props.mxEvent; let cursor; if (this.state.moving) { cursor= "grabbing"; } else if (this.state.zoom === MIN_ZOOM) { cursor = "zoom-in"; } else { cursor = "zoom-out"; } const rotationDegrees = this.state.rotation + "deg"; const zoomPercentage = this.state.zoom/100; const translatePixelsX = this.state.translationX + "px"; const translatePixelsY = this.state.translationY + "px"; // The order of the values is important! // First, we translate and only then we rotate, otherwise // we would apply the translation to an already rotated // image causing it translate in the wrong direction. const style = { cursor: cursor, transition: this.state.moving ? null : "transform 200ms ease 0s", transform: `translateX(${translatePixelsX}) translateY(${translatePixelsY}) scale(${zoomPercentage}) rotate(${rotationDegrees})`, }; let info; if (showEventMeta) { const mxEvent = this.props.mxEvent; const showTwelveHour = SettingsStore.getValue("showTwelveHourTimestamps"); let permalink = "#"; if (this.props.permalinkCreator) { permalink = this.props.permalinkCreator.forEvent(this.props.mxEvent.getId()); } const senderName = mxEvent.sender ? mxEvent.sender.name : mxEvent.getSender(); const sender = (
{senderName}
); const messageTimestamp = ( ); const avatar = ( ); info = (
{avatar}
{sender} {messageTimestamp}
); } else { // If there is no event - we're viewing an avatar, we set // an empty div here, since the panel uses space-between // and we want the same placement of elements info = (
); } return ( this.focusLock = ref} >
{info}
{this.renderContextMenu()}
); } }