21317: overflow now accounts for dynamic menu length Arvados-DCO-1.1-Signed-off-by...
[arvados.git] / services / workbench2 / src / components / multiselect-toolbar / ms-toolbar-overflow-wrapper.tsx
1 // Copyright (C) The Arvados Authors. All rights reserved.
2 //
3 // SPDX-License-Identifier: AGPL-3.0
4
5 import React, { useState, useRef, useEffect } from 'react';
6 import { StyleRulesCallback, WithStyles, withStyles } from '@material-ui/core';
7 import classnames from 'classnames';
8 import { ArvadosTheme } from 'common/custom-theme';
9 import { OverflowMenu, OverflowChild } from './ms-toolbar-overflow-menu';
10
11 type CssRules = 'visible' | 'inVisible' | 'toolbarWrapper' | 'overflowStyle';
12
13 const styles: StyleRulesCallback<CssRules> = (theme: ArvadosTheme) => ({
14     visible: {
15         order: 0,
16         visibility: 'visible',
17         opacity: 1,
18     },
19     inVisible: {
20         order: 100,
21         visibility: 'hidden',
22         pointerEvents: 'none',
23     },
24     toolbarWrapper: {
25         display: 'flex',
26         overflow: 'hidden',
27         padding: '0 20px',
28         width: '100%',
29     },
30     overflowStyle: {
31         order: 99,
32         position: 'sticky',
33         right: '-2rem',
34         backgroundColor: 'white',
35     },
36 });
37
38 type WrapperProps = {
39     children: OverflowChild[];
40     length: number;
41 };
42
43 export const IntersectionObserverWrapper = withStyles(styles)((props: WrapperProps & WithStyles<CssRules>) => {
44     const { classes, children, length } = props;
45
46     const navRef = useRef<any>(null);
47     const [visibilityMap, setVisibilityMap] = useState({});
48
49     const handleIntersection = (entries) => {
50         const updatedEntries = {};
51         entries.forEach((entry) => {
52             const targetid = entry.target.dataset.targetid;
53             if (entry.isIntersecting) {
54                 updatedEntries[targetid] = true;
55             } else {
56                 updatedEntries[targetid] = false;
57             }
58         });
59
60         setVisibilityMap((prev) => ({
61             ...prev,
62             ...updatedEntries,
63         }));
64     };
65
66     useEffect((): any => {
67         setVisibilityMap({})
68         const observer = new IntersectionObserver(handleIntersection, {
69             root: navRef.current,
70             rootMargin: '0px -20px 0px 0px',
71             threshold: 1,
72         });
73         // We are adding observers to child elements of the container div
74         // with ref as navRef. Notice that we are adding observers
75         // only if we have the data attribute targetid on the child element
76         if (navRef.current)
77             Array.from(navRef.current.children).forEach((item: any) => {
78                 if (item.dataset.targetid) {
79                     observer.observe(item);
80                 }
81             });
82         return () => {
83             observer.disconnect();
84         };
85     }, [length]);
86
87     return (
88         <div
89             className={classes.toolbarWrapper}
90             ref={navRef}
91         >
92             {React.Children.map(children, (child) => {
93                 return React.cloneElement(child, {
94                     className: classnames(child.props.className, {
95                         [classes.visible]: !!visibilityMap[child.props['data-targetid']],
96                         [classes.inVisible]: !visibilityMap[child.props['data-targetid']],
97                     }),
98                 });
99             })}
100             <OverflowMenu
101                 visibilityMap={visibilityMap}
102                 className={classes.overflowStyle}
103             >
104                 {children}
105             </OverflowMenu>
106         </div>
107     );
108 });