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, Theme, 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
  13 export enum TreeItemStatus {
  14     Initial,
  15     Pending,
  16     Loaded
  17 }
  18
  19 export interface TreeItem<T> {
  20     data: T;
  21     id: string;
  22     open: boolean;
  23     active: boolean;
  24     status: TreeItemStatus;
  25     toggled?: boolean;
  26     items?: Array<TreeItem<T>>;
  27 }
  28
  29 interface TreeProps<T> {
  30     items?: Array<TreeItem<T>>;
  31     render: (item: TreeItem<T>, level?: number) => ReactElement<{}>;
  32     toggleItemOpen: (id: string, status: TreeItemStatus) => void;
  33     toggleItemActive: (id: string, status: TreeItemStatus) => void;
  34     level?: number;
  35     onContextMenu: (event: React.MouseEvent<HTMLElement>, item: TreeItem<T>) => void;
  36 }
  37
  38 class Tree<T> extends React.Component<TreeProps<T> & WithStyles<CssRules>, {}> {
  39     render(): ReactElement<any> {
  40         const level = this.props.level ? this.props.level : 0;
  41         const { classes, render, toggleItemOpen, items, toggleItemActive, onContextMenu } = this.props;
  42         const { list, inactiveArrow, activeArrow, loader } = classes;
  43         return <List component="div" className={list}>
  44             {items && items.map((it: TreeItem<T>, idx: number) =>
  45                 <div key={`item/${level}/${idx}`}>
  46                     <ListItem button className={list} style={{ paddingLeft: (level + 1) * 20 }} onClick={() => toggleItemActive(it.id, it.status)} onContextMenu={this.handleRowContextMenu(it)}>
  47                         {it.status === TreeItemStatus.Pending ? <CircularProgress size={10} className={loader} /> : null}
  48                         {it.toggled && it.items && it.items.length === 0 ? null : this.renderArrow(it.status, it.active ? activeArrow : inactiveArrow, it.open, it.id)}
  49                         {render(it, level)}
  50                     </ListItem>
  51                     {it.items && it.items.length > 0 &&
  52                         <Collapse in={it.open} timeout="auto" unmountOnExit>
  53                             <StyledTree
  54                                 items={it.items}
  55                                 render={render}
  56                                 toggleItemOpen={toggleItemOpen}
  57                                 toggleItemActive={toggleItemActive}
  58                                 level={level + 1}
  59                                 onContextMenu={onContextMenu} />
  60                         </Collapse>}
  61                 </div>)}
  62         </List>;
  63     }
  64     renderArrow(status: TreeItemStatus, arrowClass: string, open: boolean, id: string) {
  65         const { arrowTransition, arrowVisibility, arrowRotate } = this.props.classes;
  66         return <i onClick={() => this.props.toggleItemOpen(id, status)}
  67             className={`
  68                     ${arrowClass}
  69                     ${status === TreeItemStatus.Pending ? arrowVisibility : ''}
  70                     ${open ? `fas fa-caret-down ${arrowTransition}` : `fas fa-caret-down ${arrowRotate}`}`} />;
  71     }
  72
  73     handleRowContextMenu = (item: TreeItem<T>) =>
  74         (event: React.MouseEvent<HTMLElement>) =>
  75             this.props.onContextMenu(event, item)
  76 }
  77
  78 type CssRules = 'list' | 'activeArrow' | 'inactiveArrow' | 'arrowRotate' | 'arrowTransition' | 'loader' | 'arrowVisibility';
  79
  80 const styles: StyleRulesCallback<CssRules> = (theme: Theme) => ({
  81     list: {
  82         paddingBottom: '3px',
  83         paddingTop: '3px',
  84     },
  85     activeArrow: {
  86         color: '#4285F6',
  87         position: 'absolute',
  88     },
  89     inactiveArrow: {
  90         position: 'absolute',
  91     },
  92     arrowTransition: {
  93         transition: 'all 0.1s ease',
  94     },
  95     arrowRotate: {
  96         transition: 'all 0.1s ease',
  97         transform: 'rotate(-90deg)',
  98     },
  99     arrowVisibility: {
 100         opacity: 0,
 101     },
 102     loader: {
 103         position: 'absolute',
 104         transform: 'translate(0px)',
 105         top: '3px'
 106     }
 107 });
 108
 109 const StyledTree = withStyles(styles)(Tree);
 110 export default StyledTree;