92 lines
2.5 KiB
TypeScript
92 lines
2.5 KiB
TypeScript
// Copyright 2019-2020 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import React, { useEffect } from 'react';
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import classNames from 'classnames';
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import { createPortal } from 'react-dom';
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import { Theme, themeClassName } from '../util/theme';
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export type PropsType = {
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readonly noMouseClose?: boolean;
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readonly onEscape?: () => unknown;
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readonly onClose: () => unknown;
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readonly children: React.ReactElement;
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readonly theme?: Theme;
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};
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export const ModalHost = React.memo(
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({ onEscape, onClose, children, noMouseClose, theme }: PropsType) => {
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const [root, setRoot] = React.useState<HTMLElement | null>(null);
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const [isMouseDown, setIsMouseDown] = React.useState(false);
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useEffect(() => {
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const div = document.createElement('div');
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document.body.appendChild(div);
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setRoot(div);
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return () => {
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document.body.removeChild(div);
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setRoot(null);
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};
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}, []);
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useEffect(() => {
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const handler = (event: KeyboardEvent) => {
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if (event.key === 'Escape') {
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if (onEscape) {
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onEscape();
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} else {
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onClose();
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}
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event.preventDefault();
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event.stopPropagation();
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}
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};
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document.addEventListener('keydown', handler);
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return () => {
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document.removeEventListener('keydown', handler);
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};
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}, [onEscape, onClose]);
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// This makes it easier to write dialogs to be hosted here; they won't have to worry
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// as much about preventing propagation of mouse events.
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const handleMouseDown = React.useCallback(
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(e: React.MouseEvent) => {
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if (e.target === e.currentTarget) {
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setIsMouseDown(true);
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}
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},
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[setIsMouseDown]
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);
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const handleMouseUp = React.useCallback(
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(e: React.MouseEvent) => {
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setIsMouseDown(false);
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if (e.target === e.currentTarget && isMouseDown) {
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onClose();
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}
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},
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[onClose, isMouseDown, setIsMouseDown]
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);
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return root
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? createPortal(
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<div
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role="presentation"
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className={classNames(
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'module-modal-host__overlay',
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theme ? themeClassName(theme) : undefined
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)}
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onMouseDown={noMouseClose ? undefined : handleMouseDown}
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onMouseUp={noMouseClose ? undefined : handleMouseUp}
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>
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{children}
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</div>,
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root
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)
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: null;
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}
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);
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