/*
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;
const ZOOM_STEP = 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: 100,
translationX: 0,
translationY: 0,
moving: false,
contextMenuDisplayed: false,
};
}
contextMenuButton = createRef();
initX = 0;
initY = 0;
lastX = 0;
lastY = 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;
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.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 = () => {
this.setState({moving: false});
}
renderContextMenu() {
let contextMenu = null;
if (this.state.contextMenuDisplayed) {
contextMenu = (