src/components/tree/tree.tsx

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: AGPL-3.0
   4
   5 import * as React from 'react';
   6 import List from "@material-ui/core/List/List";
   7 import ListItem from "@material-ui/core/ListItem/ListItem";
   8 import { StyleRulesCallback, withStyles, WithStyles } from '@material-ui/core/styles';
   9 import { ReactElement } from "react";
  10 import Collapse from "@material-ui/core/Collapse/Collapse";
  11 import CircularProgress from '@material-ui/core/CircularProgress';
  12 import { ArvadosTheme } from '../../common/custom-theme';
  13
  14 export enum TreeItemStatus {
  15     Initial,
  16     Pending,
  17     Loaded
  18 }
  19
  20 export interface TreeItem<T> {
  21     data: T;
  22     id: string;
  23     open: boolean;
  24     active: boolean;
  25     status: TreeItemStatus;
  26     toggled?: boolean;
  27     items?: Array<TreeItem<T>>;
  28 }
  29
  30 interface TreeProps<T> {
  31     items?: Array<TreeItem<T>>;
  32     render: (item: TreeItem<T>, level?: number) => ReactElement<{}>;
  33     toggleItemOpen: (id: string, status: TreeItemStatus) => void;
  34     toggleItemActive: (id: string, status: TreeItemStatus) => void;
  35     level?: number;
  36     onContextMenu: (event: React.MouseEvent<HTMLElement>, item: TreeItem<T>) => void;
  37 }
  38
  39 class Tree<T> extends React.Component<TreeProps<T> & WithStyles<CssRules>, {}> {
  40     render(): ReactElement<any> {
  41         const level = this.props.level ? this.props.level : 0;
  42         const { classes, render, toggleItemOpen, items, toggleItemActive, onContextMenu } = this.props;
  43         const { list, inactiveArrow, activeArrow, loader } = classes;
  44         return <List component="div" className={list}>
  45             {items && items.map((it: TreeItem<T>, idx: number) =>
  46                 <div key={`item/${level}/${idx}`}>
  47                     <ListItem button className={list} style={{ paddingLeft: (level + 1) * 20 }} onClick={() => toggleItemActive(it.id, it.status)} onContextMenu={this.handleRowContextMenu(it)}>
  48                         {it.status === TreeItemStatus.Pending ? <CircularProgress size={10} className={loader} /> : null}
  49                         {it.toggled && it.items && it.items.length === 0 ? null : this.renderArrow(it.status, it.active ? activeArrow : inactiveArrow, it.open, it.id)}
  50                         {render(it, level)}
  51                     </ListItem>
  52                     {it.items && it.items.length > 0 &&
  53                         <Collapse in={it.open} timeout="auto" unmountOnExit>
  54                             <StyledTree
  55                                 items={it.items}
  56                                 render={render}
  57                                 toggleItemOpen={toggleItemOpen}
  58                                 toggleItemActive={toggleItemActive}
  59                                 level={level + 1}
  60                                 onContextMenu={onContextMenu} />
  61                         </Collapse>}
  62                 </div>)}
  63         </List>;
  64     }
  65     renderArrow(status: TreeItemStatus, arrowClass: string, open: boolean, id: string) {
  66         const { arrowTransition, arrowVisibility, arrowRotate } = this.props.classes;
  67         return <i onClick={() => this.props.toggleItemOpen(id, status)}
  68             className={`
  69                     ${arrowClass}
  70                     ${status === TreeItemStatus.Pending ? arrowVisibility : ''}
  71                     ${open ? `fas fa-caret-down ${arrowTransition}` : `fas fa-caret-down ${arrowRotate}`}`} />;
  72     }
  73
  74     handleRowContextMenu = (item: TreeItem<T>) =>
  75         (event: React.MouseEvent<HTMLElement>) =>
  76             this.props.onContextMenu(event, item)
  77 }
  78
  79 type CssRules = 'list' | 'activeArrow' | 'inactiveArrow' | 'arrowRotate' | 'arrowTransition' | 'loader' | 'arrowVisibility';
  80
  81 const styles: StyleRulesCallback<CssRules> = (theme: ArvadosTheme) => ({
  82     list: {
  83         paddingBottom: '3px',
  84         paddingTop: '3px',
  85     },
  86     activeArrow: {
  87         color: theme.palette.primary.main,
  88         position: 'absolute',
  89     },
  90     inactiveArrow: {
  91         position: 'absolute',
  92     },
  93     arrowTransition: {
  94         transition: 'all 0.1s ease',
  95     },
  96     arrowRotate: {
  97         transition: 'all 0.1s ease',
  98         transform: 'rotate(-90deg)',
  99     },
 100     arrowVisibility: {
 101         opacity: 0,
 102     },
 103     loader: {
 104         position: 'absolute',
 105         transform: 'translate(0px)',
 106         top: '3px'
 107     }
 108 });
 109
 110 const StyledTree = withStyles(styles)(Tree);
 111 export default StyledTree;