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/*
This file is part of GNU Taler
(C) 2022 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
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, useState } from "preact/hooks";
import { theme } from "./style.js";
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 = null;
// 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 />
);
} as any);
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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