241 lines
5.5 KiB
JavaScript
241 lines
5.5 KiB
JavaScript
import * as React from "react";
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import classnames from "classnames";
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import ViewerLoading from "./viewer-loading";
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import { useSwipeable } from "../../react-swipeable";
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export default function ViewerImage(props) {
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const { dispatch, createAction, actionType, playlist, playlistPos } = props;
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const isMouseDown = React.useRef(false);
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const imgRef = React.useRef(null);
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const prePosition = React.useRef({
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x: 0,
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y: 0,
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});
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const [position, setPosition] = React.useState({
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x: 0,
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y: 0,
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});
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const handlers = useSwipeable({
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onSwiping: (e) => {
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const opacity =
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props.scaleX !== 1 && props.scaleY !== 1
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? 1
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: props.opacity - Math.abs(e.deltaX) / 500;
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const direction =
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Math.abs(e.deltaX) > Math.abs(e.deltaY) ? "horizontal" : "vertical";
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return dispatch(
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createAction(actionType.update, {
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left:
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direction === "horizontal"
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? (playlistPos === 0 && e.deltaX > 0) ||
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(playlistPos === playlist.length - 1 && e.deltaX < 0)
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? 0
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: e.deltaX
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: 0,
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opacity: direction === "vertical" && e.deltaY > 0 ? opacity : 1,
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top:
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direction === "vertical"
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? e.deltaY >= 0
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? props.currentTop + e.deltaY
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: props.currentTop
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: props.currentTop,
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deltaY: direction === "vertical" ? (e.deltaY > 0 ? e.deltaY : 0) : 0,
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deltaX: direction === "horizontal" ? e.deltaX : 0,
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})
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);
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},
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onSwipedLeft: (e) => {
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if (props.scaleX !== 1 && props.scaleY !== 1) return;
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if (e.deltaX <= -100) props.onNextClick();
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},
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onSwipedRight: (e) => {
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if (props.scaleX !== 1 && props.scaleY !== 1) return;
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if (e.deltaX >= 100) props.onPrevClick();
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},
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onSwipedDown: (e) => {
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if (props.scaleX !== 1 && props.scaleY !== 1) return;
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if (e.deltaY > 70) props.onMaskClick();
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},
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onSwiped: (e) => {
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if (Math.abs(e.deltaX) < 100) {
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return dispatch(
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createAction(actionType.update, {
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left: 0,
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top: props.currentTop,
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deltaY: 0,
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deltaX: 0,
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opacity: 1,
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})
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);
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}
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},
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});
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React.useEffect(() => {
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return () => {
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bindEvent(true);
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bindWindowResizeEvent(true);
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};
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}, []);
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React.useEffect(() => {
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bindWindowResizeEvent();
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return () => {
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bindWindowResizeEvent(true);
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};
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});
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React.useEffect(() => {
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if (props.visible && props.drag) {
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bindEvent();
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}
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if (!props.visible && props.drag) {
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handleMouseUp({});
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}
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return () => {
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bindEvent(true);
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};
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}, [props.drag, props.visible]);
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React.useEffect(() => {
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let diffX = position.x - prePosition.current.x;
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let diffY = position.y - prePosition.current.y;
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prePosition.current = {
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x: position.x,
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y: position.y,
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};
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props.onChangeImgState(
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props.width,
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props.height,
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props.top + diffY,
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props.left + diffX
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);
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}, [position]);
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function handleResize(e) {
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props.onResize();
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}
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function handleMouseDown(e) {
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if (e.button !== 0) {
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return;
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}
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if (!props.visible || !props.drag) {
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return;
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}
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e.preventDefault();
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e.stopPropagation();
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isMouseDown.current = true;
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prePosition.current = {
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x: e.nativeEvent.clientX,
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y: e.nativeEvent.clientY,
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};
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}
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const handleMouseMove = (e) => {
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if (isMouseDown.current) {
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setPosition({
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x: e.clientX,
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y: e.clientY,
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});
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}
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};
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function handleResize(e) {
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props.onResize();
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}
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function handleMouseUp(e) {
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isMouseDown.current = false;
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}
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function onClose(e) {
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if (e.target === imgRef.current) return;
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props.onMaskClick();
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}
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function bindWindowResizeEvent(remove) {
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let funcName = "addEventListener";
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if (remove) {
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funcName = "removeEventListener";
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}
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window[funcName]("resize", handleResize, false);
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}
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function bindEvent(remove) {
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let funcName = "addEventListener";
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if (remove) {
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funcName = "removeEventListener";
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}
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document[funcName]("click", handleMouseUp, false);
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document[funcName]("mousemove", handleMouseMove, false);
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}
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let imgStyle = {
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width: `${props.width}px`,
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height: `${props.height}px`,
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opacity: `${props.opacity}`,
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transition: `${props.withTransition ? "all .26s ease-out" : "none"}`,
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transform: `
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translateX(${props.left !== null ? props.left + "px" : "auto"}) translateY(${
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props.top
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}px)
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rotate(${props.rotate}deg) scaleX(${props.scaleX}) scaleY(${props.scaleY})`,
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};
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const imgClass = classnames(`${props.prefixCls}-image`, {
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drag: props.drag,
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[`${props.prefixCls}-image-transition`]: !isMouseDown.current,
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});
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let styleIndex = {
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zIndex: props.zIndex,
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};
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let imgNode = null;
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if (props.imgSrc !== "") {
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imgNode = (
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<img
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className={imgClass}
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src={props.imgSrc}
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style={imgStyle}
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ref={imgRef}
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onMouseDown={handleMouseDown}
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/>
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);
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}
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if (props.loading) {
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imgNode = (
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<div
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style={{
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display: "flex",
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height: `${window.innerHeight}px`,
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justifyContent: "center",
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alignItems: "center",
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}}
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>
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<ViewerLoading />
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</div>
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);
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}
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return (
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<div
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className={`${props.prefixCls}-canvas`}
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onClick={onClose}
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style={styleIndex}
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{...handlers}
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>
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{imgNode}
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</div>
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);
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}
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