github.com/minio/console@v1.4.1/web-app/src/screens/Console/Common/VirtualizedList/VirtualizedList.tsx (about)

     1  // This file is part of MinIO Console Server
     2  // Copyright (c) 2022 MinIO, Inc.
     3  //
     4  // This program is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Affero General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // This program is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12  // GNU Affero General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Affero General Public License
    15  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16  
    17  import React, { Fragment, ReactElement } from "react";
    18  import { FixedSizeList as List } from "react-window";
    19  import InfiniteLoader from "react-window-infinite-loader";
    20  import { AutoSizer } from "react-virtualized";
    21  
    22  interface IVirtualizedList {
    23    rowRenderFunction: (index: number) => ReactElement | null;
    24    totalItems: number;
    25    defaultHeight?: number;
    26  }
    27  
    28  let itemStatusMap: any = {};
    29  const LOADING = 1;
    30  const LOADED = 2;
    31  
    32  const VirtualizedList = ({
    33    rowRenderFunction,
    34    totalItems,
    35    defaultHeight,
    36  }: IVirtualizedList) => {
    37    const isItemLoaded = (index: any) => !!itemStatusMap[index];
    38  
    39    const loadMoreItems = (startIndex: number, stopIndex: number) => {
    40      for (let index = startIndex; index <= stopIndex; index++) {
    41        itemStatusMap[index] = LOADING;
    42      }
    43  
    44      for (let index = startIndex; index <= stopIndex; index++) {
    45        itemStatusMap[index] = LOADED;
    46      }
    47    };
    48  
    49    const RenderItemLine = ({ index, style }: any) => {
    50      return <div style={style}>{rowRenderFunction(index)}</div>;
    51    };
    52  
    53    return (
    54      <Fragment>
    55        <InfiniteLoader
    56          isItemLoaded={isItemLoaded}
    57          loadMoreItems={loadMoreItems}
    58          itemCount={totalItems}
    59        >
    60          {({ onItemsRendered, ref }) => (
    61            // @ts-ignore
    62            <AutoSizer>
    63              {({ width, height }) => {
    64                return (
    65                  <List
    66                    itemSize={defaultHeight || 220}
    67                    height={height}
    68                    itemCount={totalItems}
    69                    width={width}
    70                    ref={ref}
    71                    onItemsRendered={onItemsRendered}
    72                  >
    73                    {RenderItemLine}
    74                  </List>
    75                );
    76              }}
    77            </AutoSizer>
    78          )}
    79        </InfiniteLoader>
    80      </Fragment>
    81    );
    82  };
    83  
    84  export default VirtualizedList;