21762: tweaked callback observer
[arvados.git] / services / workbench2 / src / views-components / side-panel / side-panel.tsx
1 // Copyright (C) The Arvados Authors. All rights reserved.
2 //
3 // SPDX-License-Identifier: AGPL-3.0
4
5 import React, { useRef, useEffect } from 'react';
6 import { StyleRulesCallback, WithStyles, withStyles } from '@material-ui/core/styles';
7 import { ArvadosTheme } from 'common/custom-theme';
8 import { SidePanelTree, SidePanelTreeProps } from 'views-components/side-panel-tree/side-panel-tree';
9 import { Dispatch } from 'redux';
10 import { connect } from 'react-redux';
11 import { navigateFromSidePanel, setCurrentSideWidth } from 'store/side-panel/side-panel-action';
12 import { Grid } from '@material-ui/core';
13 import { SidePanelButton } from 'views-components/side-panel-button/side-panel-button';
14 import { RootState } from 'store/store';
15 import SidePanelToggle from 'views-components/side-panel-toggle/side-panel-toggle';
16 import { SidePanelCollapsed } from './side-panel-collapsed';
17
18 const DRAWER_WIDTH = 240;
19
20 type CssRules = 'root' | 'topButtonContainer';
21
22 const styles: StyleRulesCallback<CssRules> = (theme: ArvadosTheme) => ({
23     root: {
24         background: theme.palette.background.paper,
25         borderRight: `1px solid ${theme.palette.divider}`,
26         height: '100%',
27         overflowX: 'auto',
28         width: DRAWER_WIDTH,
29     },
30     topButtonContainer: {
31         display: 'flex',
32         justifyContent: 'space-between'
33     }
34 });
35
36 const mapDispatchToProps = (dispatch: Dispatch): SidePanelTreeProps => ({
37     onItemActivation: id => {
38         dispatch<any>(navigateFromSidePanel(id));
39     },
40     setCurrentSideWidth: width => {
41         dispatch<any>(setCurrentSideWidth(width))
42     }
43 });
44
45 const mapStateToProps = ({ router, sidePanel, detailsPanel }: RootState) => ({
46     currentRoute: router.location ? router.location.pathname : '',
47     isCollapsed: sidePanel.collapsedState,
48     isDetailsPanelTransitioning: detailsPanel.isTransitioning
49 });
50
51 export const SidePanel = withStyles(styles)(
52     connect(mapStateToProps, mapDispatchToProps)(
53         ({ classes, ...props }: WithStyles<CssRules> & SidePanelTreeProps & { currentRoute: string, isDetailsPanelTransitioning: boolean }) =>{
54
55         const splitPaneRef = useRef<any>(null)
56
57         useEffect(()=>{
58             const splitPane = splitPaneRef?.current as Element
59
60             if (!splitPane) return;
61
62             const observerCallback: ResizeObserverCallback = (entries: ResizeObserverEntry[]) => {
63                 //entries[0] targets the left side of the split pane
64                 const width = entries[0].contentRect.width
65                 if (width === props.currentSideWidth) return;
66                 
67                 //prevents potential infinite resize triggers
68                 window.requestAnimationFrame((): void | undefined => {
69                   if (!Array.isArray(entries) || !entries.length) {
70                       props.setCurrentSideWidth(width)
71                     return;
72                   }
73                 });
74               };
75
76             const observer = new ResizeObserver(observerCallback)
77
78             observer.observe(splitPane)
79             return ()=> observer.disconnect()
80         }, [props])
81
82             return (
83                 <Grid item xs>
84                         {props.isCollapsed ? 
85                             <div ref={splitPaneRef}>
86                                 <>
87                                     <SidePanelToggle />
88                                     <SidePanelCollapsed />
89                                 </>
90                             </div>
91                             :
92                             <>
93                                 <div ref={splitPaneRef}>
94                                     <Grid className={classes.topButtonContainer}>
95                                         <SidePanelButton key={props.currentRoute} />
96                                         <SidePanelToggle/>
97                                     </Grid>
98                                     <SidePanelTree {...props} />
99                                 </div>
100                             </>
101                         }
102                     </Grid>
103         )}
104     ));