Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | 1x 1x 1x 1x 1x 1x 1x | import React, {
CSSProperties,
FC,
ReactNode,
useLayoutEffect,
useRef,
useState,
} from "react";
import { Portal } from "./Portal";
import styled from "styled-components";
export type PinDirection =
| "top-left"
| "bottom-left"
| "top-right"
| "bottom-right";
export type RelativePortalProps = {
children: ReactNode;
offsetX?: number;
offsetY?: number;
zIndex?: number;
} & (
| {
pin?: PinDirection;
}
| {
pin: "parent-edge";
parentWidth: number;
}
);
const pinStyles: Record<PinDirection, CSSProperties> = {
"top-left": {
position: "absolute",
top: 0,
left: 0,
},
"top-right": {
position: "absolute",
top: 0,
right: 0,
},
"bottom-left": {
position: "absolute",
bottom: 0,
left: 0,
},
"bottom-right": {
position: "absolute",
bottom: 0,
right: 0,
},
};
const MIN_MARGIN = 10;
const Pin = styled.div`
background: transparent;
width: 1px;
height: 1px;
margin-right: -1px;
margin-bottom: -1px;
`;
export const RelativePortal: FC<RelativePortalProps> = ({
children,
offsetX = 0,
offsetY = 0,
zIndex,
...props
}) => {
const ref = useRef<HTMLDivElement>(null);
const contentsRef = useRef<HTMLDivElement>(null);
const pin = props.pin ?? "top-left";
const [x, setX] = useState(0);
const [y, setY] = useState(0);
useLayoutEffect(() => {
const update = () => {
const rect = ref.current?.getBoundingClientRect();
const contentsHeight = contentsRef.current?.offsetHeight || 0;
const contentsWidth = contentsRef.current?.offsetWidth || 0;
Iif (rect) {
let newY = rect.top + offsetY;
let newX = rect.left + offsetX;
if (pin === "bottom-left" || pin === "bottom-right") {
Iif (newY - contentsHeight - MIN_MARGIN < 0) {
newY = contentsHeight + MIN_MARGIN;
}
} else {
Iif (newY + contentsHeight + MIN_MARGIN > window.innerHeight) {
newY = window.innerHeight - contentsHeight - MIN_MARGIN;
}
}
if (pin === "bottom-right" || pin === "top-right") {
Iif (newX - contentsWidth - MIN_MARGIN < 0) {
newX = contentsWidth + MIN_MARGIN;
}
} else if (props.pin === "parent-edge") {
Iif (newX + contentsWidth + MIN_MARGIN > window.innerWidth) {
newX -= props.parentWidth + contentsWidth;
}
} else {
Iif (newX + contentsWidth + MIN_MARGIN > window.innerWidth) {
newX = window.innerWidth - contentsWidth - MIN_MARGIN;
}
}
setY(newY);
setX(newX);
}
};
update();
const timer = setInterval(update, 100);
return () => {
clearInterval(timer);
};
}, [ref, offsetX, offsetY, pin, props.pin, props]);
return (
<>
<Pin ref={ref} />
<Portal>
<div
style={{
position: "fixed",
left: x,
top: y,
zIndex,
}}
>
<div
ref={contentsRef}
style={pin !== "parent-edge" ? pinStyles[pin] : undefined}
>
{children}
</div>
</div>
</Portal>
</>
);
};
|