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import { css } from "@linaria/core";
import { createPortal, forwardRef } from "preact/compat";
import {
h,
JSX,
VNode,
ComponentChildren,
RefObject,
isValidElement,
cloneElement,
Fragment,
} from "preact";
import { Ref, useEffect, useMemo, useState } from "preact/hooks";
// eslint-disable-next-line import/extensions
import { alpha } from "./colors/manipulation";
// eslint-disable-next-line import/extensions
import { theme } from "./style";
const baseStyle = css`
position: fixed;
z-index: ${theme.zIndex.modal};
right: 0px;
bottom: 0px;
top: 0px;
left: 0px;
`;
interface Props {
class: string;
children: ComponentChildren;
disablePortal?: boolean;
container?: VNode;
}
export const Portal = forwardRef(function Portal(
{ container, disablePortal, children }: Props,
ref: Ref<any>,
): VNode {
const [mountNode, setMountNode] = useState<HTMLElement | undefined>(
undefined,
);
const handleRef = useForkRef(
isValidElement(children) ? children.ref : null,
ref,
);
useEffect(() => {
if (!disablePortal) {
setMountNode(getContainer(container) || document.body);
}
}, [container, disablePortal]);
useEffect(() => {
if (mountNode && !disablePortal) {
setRef(ref, mountNode);
return () => {
setRef(ref, null);
};
}
return undefined;
}, [ref, mountNode, disablePortal]);
if (disablePortal) {
if (isValidElement(children)) {
return cloneElement(children, {
ref: handleRef,
});
}
return <Fragment>{children}</Fragment>;
}
return mountNode ? (
createPortal(<Fragment>{children}</Fragment>, mountNode)
) : (
<Fragment />
);
});
function getContainer(container: any): any {
return typeof container === "function" ? container() : container;
}
function useForkRef<Instance>(
refA: React.Ref<Instance> | null | undefined,
refB: React.Ref<Instance> | null | undefined,
): React.Ref<Instance> | null {
/**
* This will create a new function if the ref props change and are defined.
* This means react will call the old forkRef with `null` and the new forkRef
* with the ref. Cleanup naturally emerges from this behavior.
*/
return useMemo(() => {
if (refA == null && refB == null) {
return null;
}
return (refValue) => {
setRef(refA, refValue);
setRef(refB, refValue);
};
}, [refA, refB]);
}
function setRef<T>(
ref: RefObject<T | null> | ((instance: T | null) => void) | null | undefined,
value: T | null,
): void {
if (typeof ref === "function") {
ref(value);
} else if (ref) {
ref.current = value;
}
}
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