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import { MiddlewareData, Placement } from "@floating-ui/dom"; import { Fragment, FunctionComponent, h, Ref } from "preact"; import { useCallback, useEffect, useRef, useState } from "preact/hooks"; import { arrow, autoUpdate, flip, offset, shift, useFloating, } from "./packages/floating-ui-preact-dom"; import styles from "./Dialog.css?inline"; import { Position } from "./types"; import { parseUnanchoredPosition } from "./utils"; type CssPosition = Partial< Record<"top" | "left" | "right" | "bottom", number | string> >; export interface OpenDialogOptions { /** * Control the placement and behavior of the dialog. */ position: Position; strategy?: "fixed" | "absolute"; isOpen: boolean; close: () => void; onDismiss?: () => void; containerId: string; showArrow?: boolean; children?: preact.ComponentChildren; } export function useDialog({ onClose, onOpen, initialValue = false, }: { onClose?: () => void; onOpen?: () => void; initialValue?: boolean; } = {}) { const [isOpen, setIsOpen] = useState<boolean>(initialValue); const open = useCallback(() => { setIsOpen(true); onOpen?.(); }, [onOpen]); const close = useCallback(() => { setIsOpen(false); onClose?.(); }, [onClose]); const toggle = useCallback(() => { if (isOpen) onClose?.(); else onOpen?.(); setIsOpen((prev) => !prev); }, [isOpen, onClose, onOpen]); return { isOpen, open, close, toggle, }; } export const Dialog: FunctionComponent<OpenDialogOptions> = ({ position, isOpen, close, onDismiss, containerId, strategy, children, showArrow = true, }) => { const arrowRef = useRef<HTMLDivElement>(null); const dialogRef = useRef<HTMLDialogElement>(null); const anchor = position.type === "POPOVER" ? position.anchor : null; const placement = position.type === "POPOVER" ? position.placement : undefined; const { refs, floatingStyles, middlewareData, placement: actualPlacement, } = useFloating({ elements: { reference: anchor, }, strategy, transform: false, placement, whileElementsMounted: autoUpdate, middleware: [ flip({ padding: 10, mainAxis: true, crossAxis: true, }), shift(), offset(8), arrow({ element: arrowRef, }), ], }); let unanchoredPosition: CssPosition = {}; if (position.type === "DIALOG") { unanchoredPosition = parseUnanchoredPosition(position); } const dismiss = useCallback(() => { close(); onDismiss?.(); }, [close, onDismiss]); useEffect(() => { // Only enable 'quick dismiss' for popovers if (position.type === "MODAL" || position.type === "DIALOG") return; const escapeHandler = (e: KeyboardEvent) => { if (e.key == "Escape") { dismiss(); } }; const clickOutsideHandler = (e: MouseEvent) => { if ( !(e.target instanceof Element) || !e.target.closest(`#${containerId}`) ) { dismiss(); } }; const observer = new MutationObserver((mutations) => { if (position.anchor === null) return; mutations.forEach((mutation) => { const removedNodes = Array.from(mutation.removedNodes); const hasBeenRemoved = removedNodes.some((node) => { return node === position.anchor || node.contains(position.anchor); }); if (hasBeenRemoved) { close(); } }); }); window.addEventListener("mousedown", clickOutsideHandler); window.addEventListener("keydown", escapeHandler); observer.observe(document.body, { subtree: true, childList: true, }); return () => { window.removeEventListener("mousedown", clickOutsideHandler); window.removeEventListener("keydown", escapeHandler); observer.disconnect(); }; // eslint-disable-next-line react-hooks/exhaustive-deps -- anchor only exists in popover }, [position.type, close, (position as any).anchor, dismiss, containerId]); function setDiagRef(node: HTMLDialogElement | null) { refs.setFloating(node); dialogRef.current = node; } useEffect(() => { if (!dialogRef.current) return; if (isOpen && !dialogRef.current.hasAttribute("open")) { dialogRef.current[position.type === "MODAL" ? "showModal" : "show"](); } if (!isOpen && dialogRef.current.hasAttribute("open")) { dialogRef.current.close(); } }, [dialogRef, isOpen, position.type]); const classes = [ "dialog", position.type === "MODAL" ? "modal" : position.type === "POPOVER" ? "anchored" : `unanchored unanchored-${position.placement}`, actualPlacement, ].join(" "); return ( <> <style dangerouslySetInnerHTML={{ __html: styles }} /> <dialog ref={setDiagRef} class={classes} style={anchor ? floatingStyles : unanchoredPosition} > {children && <Fragment>{children}</Fragment>} {anchor && showArrow && ( <DialogArrow arrowData={middlewareData?.arrow} arrowRef={arrowRef} placement={actualPlacement} /> )} </dialog> </> ); }; function DialogArrow({ arrowData, arrowRef, placement, }: { arrowData: MiddlewareData["arrow"]; arrowRef: Ref<HTMLDivElement>; placement: Placement; }) { const { x: arrowX, y: arrowY } = arrowData ?? {}; const staticSide = { top: "bottom", right: "left", bottom: "top", left: "right", }[placement.split("-")[0]] || "bottom"; const arrowStyles = { left: arrowX != null ? `${arrowX}px` : "", top: arrowY != null ? `${arrowY}px` : "", right: "", bottom: "", [staticSide]: "-4px", }; return ( <div ref={arrowRef} class={["arrow", placement].join(" ")} style={arrowStyles} /> ); } export function DialogHeader({ children, innerRef, }: { children: preact.ComponentChildren; innerRef?: Ref<HTMLElement>; }) { return ( <header ref={innerRef} class="dialog-header"> {children} </header> ); } export function DialogContent({ children, innerRef, }: { children: preact.ComponentChildren; innerRef?: Ref<HTMLDivElement>; }) { return ( <div ref={innerRef} class="dialog-content"> {children} </div> ); }