Morphing Modal

"use client";
import { Ban, Lock, ScanFace, ScrollText, ShieldCheck, Trash2 } from "lucide-react";
import { useState } from "react";
import { MorphingModal } from "@/components/motion/morphing-modal";
type View = "options" | "private-key" | "recovery" | null;
export function MorphingModalPreview() {
    const [view, setView] = useState<View>(null);
    return (<div className="flex flex-col items-center gap-3">
      <button type="button" onClick={() => setView("options")} className="inline-flex h-10 items-center rounded-full border border-border bg-card px-5 text-sm font-medium text-foreground press hover:border-(--color-border-strong)">
        Open wallet options
      </button>
      <p className="text-xs text-muted-foreground">Click a row. The modal morphs height to match new content.</p>

      <MorphingModal viewId={view} onClose={() => setView(null)}>
        {view === "options" ? (<Options onPrivateKey={() => setView("private-key")} onRecovery={() => setView("recovery")} onClose={() => setView(null)}/>) : view === "private-key" ? (<PrivateKey onBack={() => setView("options")}/>) : view === "recovery" ? (<Recovery onBack={() => setView("options")}/>) : null}
      </MorphingModal>
    </div>);
}
function Header({ title, onClose }: {
    title: string;
    onClose: () => void;
}) {
    return (<div className="mb-4 flex items-center justify-between">
      <h2 className="text-base font-semibold text-foreground">{title}</h2>
      <button type="button" onClick={onClose} aria-label="Close" className="inline-flex h-7 w-7 items-center justify-center rounded-full text-muted-foreground hover:bg-foreground/[0.06]">
        ✕
      </button>
    </div>);
}
function Row({ icon: Icon, label, destructive, onClick, }: {
    icon: typeof Lock;
    label: string;
    destructive?: boolean;
    onClick: () => void;
}) {
    return (<button type="button" onClick={onClick} className={`flex w-full items-center gap-3 rounded-2xl px-4 py-3 text-sm font-medium transition-colors press ${destructive
            ? "bg-destructive/10 text-destructive hover:bg-destructive/15"
            : "bg-foreground/[0.04] text-foreground hover:bg-foreground/[0.08]"}`}>
      <Icon className="h-4 w-4"/>
      {label}
    </button>);
}
function Options({ onPrivateKey, onRecovery, onClose, }: {
    onPrivateKey: () => void;
    onRecovery: () => void;
    onClose: () => void;
}) {
    return (<div>
      <Header title="Options" onClose={onClose}/>
      <div className="flex flex-col gap-2">
        <Row icon={Lock} label="View Private Key" onClick={onPrivateKey}/>
        <Row icon={ScrollText} label="View Recovery Phrase" onClick={onRecovery}/>
        <Row icon={Trash2} label="Remove Wallet" destructive onClick={onClose}/>
      </div>
    </div>);
}
function PrivateKey({ onBack }: {
    onBack: () => void;
}) {
    return (<div>
      <div className="mb-3 flex items-start justify-between">
        <Lock className="h-5 w-5 text-foreground"/>
        <button type="button" onClick={onBack} aria-label="Back" className="inline-flex h-7 w-7 items-center justify-center rounded-full text-muted-foreground hover:bg-foreground/[0.06]">
          ✕
        </button>
      </div>
      <h2 className="text-xl font-semibold tracking-tight text-foreground">Private Key</h2>
      <p className="mt-2 text-sm text-muted-foreground">
        Your Private Key is the key used to back up your wallet. Keep it secret and secure at all times.
      </p>
      <hr className="my-4 border-border"/>
      <ul className="flex flex-col gap-2.5 text-sm text-muted-foreground">
        <li className="flex items-center gap-2.5"><ShieldCheck className="h-4 w-4"/> Keep your private key safe</li>
        <li className="flex items-center gap-2.5"><ScrollText className="h-4 w-4"/> Don&apos;t share it with anyone else</li>
        <li className="flex items-center gap-2.5"><Ban className="h-4 w-4"/> If you lose it, we can&apos;t recover it</li>
      </ul>
      <div className="mt-5 flex gap-2">
        <button type="button" onClick={onBack} className="inline-flex h-10 flex-1 items-center justify-center rounded-full bg-foreground/[0.06] text-sm font-medium text-foreground press">
          Cancel
        </button>
        <button type="button" onClick={onBack} className="inline-flex h-10 flex-1 items-center justify-center gap-2 rounded-full bg-foreground text-sm font-medium text-background press">
          <ScanFace className="h-4 w-4"/>
          Reveal
        </button>
      </div>
    </div>);
}
function Recovery({ onBack }: {
    onBack: () => void;
}) {
    return (<div>
      <div className="mb-3 flex items-start justify-between">
        <ScrollText className="h-5 w-5 text-foreground"/>
        <button type="button" onClick={onBack} aria-label="Back" className="inline-flex h-7 w-7 items-center justify-center rounded-full text-muted-foreground hover:bg-foreground/[0.06]">
          ✕
        </button>
      </div>
      <h2 className="text-xl font-semibold tracking-tight text-foreground">Recovery Phrase</h2>
      <p className="mt-2 text-sm text-muted-foreground">
        12 words you can use to restore your wallet on any device. Write them down somewhere safe.
      </p>
      <div className="mt-4 grid grid-cols-3 gap-2">
        {["mountain", "river", "candle", "harbor", "amber", "violet", "spring", "ocean", "marble", "thunder", "willow", "crystal"].map((w, i) => (<div key={w} className="rounded-lg border border-border bg-background/40 px-2 py-1.5 text-xs text-foreground">
            <span className="mr-1 text-muted-foreground">{i + 1}.</span>
            {w}
          </div>))}
      </div>
      <button type="button" onClick={onBack} className="mt-5 inline-flex h-10 w-full items-center justify-center rounded-full bg-foreground text-sm font-medium text-background press">
        Done
      </button>
    </div>);
}

"use client";
// asharca.github.io/ui/components/motion/morphing-modal

import {
  AnimatePresence,
  motion,
  useReducedMotion,
} from "motion/react";
import { type ReactNode, useEffect, useLayoutEffect, useState } from "react";
import { createPortal } from "react-dom";
import { EASE_OUT, SPRING_PANEL } from "@/lib/ease";
import { PresenceGate } from "@/lib/presence-gate";
import { cn } from "@/lib/utils";

export interface MorphingModalProps {
  /** Which view is currently shown. `null` closes the modal. */
  viewId: string | null;
  onClose: () => void;
  children: ReactNode;
  /** "bottom" anchors to the viewport bottom (mobile-like). "center" centers vertically. */
  placement?: "bottom" | "center";
  className?: string;
}

export function MorphingModal({
  viewId,
  onClose,
  children,
  placement = "bottom",
  className,
}: MorphingModalProps) {
  const open = viewId !== null;
  const reduce = useReducedMotion();
  const enterY = reduce ? 0 : placement === "bottom" ? 40 : 20;
  const enterScale = reduce ? 1 : 0.97;
  const [portalReady, setPortalReady] = useState(false);
  const [backgroundScrollLocked, setBackgroundScrollLocked] = useState(open);

  useEffect(() => setPortalReady(true), []);
  if (open && !backgroundScrollLocked) setBackgroundScrollLocked(true);

  useLayoutEffect(() => {
    if (!backgroundScrollLocked) return;
    const prev = document.body.style.overflow;
    document.body.style.overflow = "hidden";
    return () => {
      document.body.style.overflow = prev;
    };
  }, [backgroundScrollLocked]);

  if (!portalReady) return null;

  // Keep viewport coordinates independent of transformed/clipped consumers.
  // Fixed siblings retain the inset, non-interactive panel positioning layer.
  // CSS variables keep the final paint values in Motion's render loop. Motion
  // 11 cancels WAAPI before its final inline-style write, flashing the old value
  // for a frame in Chrome (including while an exiting sibling is still mounted).
  return createPortal(
    <AnimatePresence
      initial={false}
      onExitComplete={() => {
        if (!open) setBackgroundScrollLocked(false);
      }}
    >
      {open ? (
        <PresenceGate key="backdrop">
          {({ gate }) => (
            <motion.button
              type="button"
              aria-label="Close modal"
              initial={{ "--modal-opacity": 0 }}
              animate={{ "--modal-opacity": 1 }}
              exit={{ "--modal-opacity": 0 }}
              transition={{ duration: 0.2, ease: EASE_OUT }}
              {...gate}
              onClick={onClose}
              className="pointer-events-auto fixed inset-0 z-[80] bg-background/5 [backdrop-filter:blur(14px)_saturate(140%)] [-webkit-backdrop-filter:blur(14px)_saturate(140%)] [opacity:var(--modal-opacity)]"
            />
          )}
        </PresenceGate>
      ) : null}

      {open ? (
        <PresenceGate key="panel-layer">
          {({ isPresent, gate }) => (
            // The layer itself never takes pointer events, so it carries
            // `inert` alone rather than the gate's pointer-events value.
            <motion.div
              layoutRoot
              layoutScroll
              data-framer-portal-id="morphing-modal"
              inert={!isPresent}
              className={cn(
                "pointer-events-none fixed inset-4 z-[80] flex justify-center",
                placement === "bottom" ? "items-end pb-4" : "items-center",
              )}
            >
              <motion.div
                key="panel"
                layout
                initial={{ "--modal-opacity": 0, y: enterY, scale: enterScale }}
                animate={{ "--modal-opacity": 1, y: 0, scale: 1 }}
                exit={{
                  "--modal-opacity": 0,
                  y: enterY,
                  scale: reduce ? 1 : 0.98,
                  transition: { duration: 0.18, ease: EASE_OUT },
                }}
                transition={SPRING_PANEL}
                {...gate}
                className={cn(
                  "pointer-events-auto relative w-full max-w-sm overflow-hidden rounded-3xl border border-border bg-background shadow-2xl will-change-transform [opacity:var(--modal-opacity)]",
                  className,
                )}
              >
                {/* popLayout offsets must keep the same containing block while
                    layout projection applies and removes transforms. */}
                <motion.div layout="position" className="relative p-5">
                  <AnimatePresence mode="popLayout" initial={false}>
                    <motion.div
                      key={viewId}
                      className={cn(
                        "[opacity:var(--modal-opacity)]",
                        !reduce && "[filter:var(--modal-filter)]",
                      )}
                      initial={
                        reduce
                          ? { "--modal-opacity": 0 }
                          : { "--modal-opacity": 0, y: 8, "--modal-filter": "blur(4px)" }
                      }
                      animate={
                        reduce
                          ? {
                              "--modal-opacity": 1,
                              transition: {
                                duration: 0.18,
                                ease: EASE_OUT,
                              },
                            }
                          : {
                              "--modal-opacity": 1,
                              y: 0,
                              "--modal-filter": "blur(0px)",
                              transition: {
                                duration: 0.24,
                                ease: EASE_OUT,
                              },
                            }
                      }
                      exit={
                        reduce
                          ? {
                              "--modal-opacity": 0,
                              transition: {
                                duration: 0.14,
                                ease: EASE_OUT,
                              },
                            }
                          : {
                              "--modal-opacity": 0,
                              y: -8,
                              "--modal-filter": "blur(4px)",
                              transition: {
                                duration: 0.16,
                                ease: EASE_OUT,
                              },
                            }
                      }
                    >
                      {children}
                    </motion.div>
                  </AnimatePresence>
                </motion.div>
              </motion.div>
            </motion.div>
          )}
        </PresenceGate>
      ) : null}
    </AnimatePresence>,
    document.body,
  );
}