mlogclub
377 lines
10 KiB
TypeScript
377 lines
10 KiB
TypeScript
"use client";
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import {
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ExternalLinkIcon,
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RefreshCwIcon,
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RotateCcwIcon,
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RotateCwIcon,
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XIcon,
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ZoomInIcon,
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ZoomOutIcon,
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} from "lucide-react";
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import {
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createContext,
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useCallback,
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useContext,
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useEffect,
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useMemo,
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useRef,
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useState,
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type ReactNode,
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} from "react";
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import type { ReactZoomPanPinchContentRef } from "react-zoom-pan-pinch";
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import {
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TransformComponent,
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TransformWrapper,
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} from "react-zoom-pan-pinch";
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import { cn } from "@/lib/utils";
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type ImageLightboxItem = {
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src: string;
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alt?: string;
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};
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type ImageLightboxContextValue = {
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open: (src: string, alt?: string) => void;
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close: () => void;
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};
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const ImageLightboxContext = createContext<ImageLightboxContextValue | null>(
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null,
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);
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const iconBtnClass =
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"inline-flex size-7 shrink-0 items-center justify-center rounded-md text-white outline-none transition-colors hover:bg-white/10 focus-visible:ring-2 focus-visible:ring-white/40";
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export function useImageLightbox(): ImageLightboxContextValue {
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const ctx = useContext(ImageLightboxContext);
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if (!ctx) {
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throw new Error("useImageLightbox 必须在 ImageLightboxProvider 内使用");
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}
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return ctx;
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}
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export function useImageLightboxOptional(): ImageLightboxContextValue | null {
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return useContext(ImageLightboxContext);
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}
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export type ImageLightboxProps = {
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open: boolean;
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onOpenChange: (open: boolean) => void;
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src: string | null;
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alt?: string;
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};
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function canOpenInNewTab(url: string): boolean {
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if (!url) {
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return false;
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}
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if (url.startsWith("/")) {
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return true;
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}
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try {
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const parsed = new URL(url);
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return (
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parsed.protocol === "http:" ||
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parsed.protocol === "https:" ||
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parsed.protocol === "blob:"
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);
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} catch {
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return false;
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}
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}
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function LightboxImageBody({
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src,
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alt,
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pinchRef,
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rotationDeg,
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}: {
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src: string;
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alt?: string;
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pinchRef: React.RefObject<ReactZoomPanPinchContentRef | null>;
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rotationDeg: number;
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}) {
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const [loading, setLoading] = useState(true);
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const [error, setError] = useState(false);
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const showOpenTab = canOpenInNewTab(src);
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useEffect(() => {
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requestAnimationFrame(() => {
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pinchRef.current?.centerView(1, 0);
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});
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}, [rotationDeg, pinchRef]);
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return (
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<div className="relative h-full min-h-0 w-full min-w-0 flex-1">
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{loading && !error ? (
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<div
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className="pointer-events-none absolute inset-0 z-10 flex items-center justify-center"
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aria-hidden
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>
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<div className="size-10 animate-pulse rounded-full bg-white/25" />
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</div>
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) : null}
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{error ? (
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<div className="flex min-h-[min(50vh,320px)] flex-col items-center justify-center gap-4 px-6 py-12 text-center text-sm text-white/90">
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<p>图片加载失败</p>
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{showOpenTab ? (
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<a
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href={src}
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target="_blank"
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rel="noopener noreferrer"
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className="inline-flex h-7 items-center justify-center rounded-md bg-white/90 px-2.5 text-xs font-medium text-slate-900"
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>
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在新标签页打开
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</a>
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) : null}
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</div>
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) : (
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<TransformWrapper
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ref={pinchRef}
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initialScale={1}
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minScale={0.35}
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maxScale={8}
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centerOnInit
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centerZoomedOut
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limitToBounds
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wheel={{ step: 0.12 }}
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pinch={{ step: 5 }}
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panning={{ velocityDisabled: false }}
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doubleClick={{ mode: "reset", step: 0.7 }}
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>
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<TransformComponent
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wrapperClass="!h-full !w-full !max-h-full !max-w-full"
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contentClass="!flex !h-full !min-h-0 !w-full !min-w-0 !items-center !justify-center !p-4 sm:!p-6"
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>
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{/* eslint-disable-next-line @next/next/no-img-element -- 外链与任意尺寸大图预览 */}
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<img
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src={src}
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alt={alt || "预览图片"}
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draggable={false}
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style={{ transform: `rotate(${rotationDeg}deg)` }}
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className={cn(
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"max-h-[min(85vh,calc(100dvh-3rem))] max-w-full origin-center object-contain transition-transform duration-200 ease-out select-none",
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loading ? "opacity-0" : "opacity-100",
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)}
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onLoad={() => {
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setLoading(false);
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setError(false);
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requestAnimationFrame(() => {
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pinchRef.current?.centerView(1, 0);
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});
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}}
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onError={() => {
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setLoading(false);
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setError(true);
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}}
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/>
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</TransformComponent>
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</TransformWrapper>
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)}
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</div>
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);
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}
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function ImageLightboxDialogContent({
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src,
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alt,
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onRequestClose,
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}: {
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src: string;
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alt?: string;
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onRequestClose: () => void;
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}) {
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const pinchRef = useRef<ReactZoomPanPinchContentRef | null>(null);
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const [rotationDeg, setRotationDeg] = useState(0);
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const showOpenTab = canOpenInNewTab(src);
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const titleText = alt?.trim() || "图片预览";
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const rotateLeft = useCallback(() => {
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setRotationDeg((d) => (d - 90 + 360) % 360);
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}, []);
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const rotateRight = useCallback(() => {
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setRotationDeg((d) => (d + 90) % 360);
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}, []);
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return (
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<div className="relative flex h-full min-h-0 w-full flex-col">
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<div
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className="absolute inset-0 z-0 bg-black/85"
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aria-hidden
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onClick={onRequestClose}
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/>
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<div className="relative z-10 flex h-full min-h-0 flex-col">
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<div className="flex h-12 shrink-0 items-center gap-2 border-b border-white/10 bg-black/55 px-2 py-2 text-white sm:gap-3 sm:px-4">
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<h2
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id="widget-image-lightbox-title"
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className="min-w-0 flex-1 truncate text-left text-sm font-medium leading-snug text-white"
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>
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{titleText}
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</h2>
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<div className="flex shrink-0 items-center gap-0.5 sm:gap-1">
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<button
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type="button"
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className={iconBtnClass}
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aria-label="放大"
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onClick={() => pinchRef.current?.zoomIn(0.25)}
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>
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<ZoomInIcon className="size-4" />
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</button>
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<button
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type="button"
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className={iconBtnClass}
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aria-label="缩小"
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onClick={() => pinchRef.current?.zoomOut(0.25)}
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>
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<ZoomOutIcon className="size-4" />
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</button>
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<button
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type="button"
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className={iconBtnClass}
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aria-label="向左旋转"
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onClick={rotateLeft}
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>
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<RotateCcwIcon className="size-4" />
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</button>
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<button
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type="button"
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className={iconBtnClass}
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aria-label="向右旋转"
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onClick={rotateRight}
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>
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<RotateCwIcon className="size-4" />
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</button>
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<button
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type="button"
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className={iconBtnClass}
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aria-label="重置缩放、位置与旋转"
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onClick={() => {
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setRotationDeg(0);
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pinchRef.current?.resetTransform(200);
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}}
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>
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<RefreshCwIcon className="size-4" />
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</button>
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{showOpenTab ? (
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<button
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type="button"
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className={iconBtnClass}
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aria-label="在新标签页打开"
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onClick={() => {
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window.open(src, "_blank", "noopener,noreferrer");
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}}
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>
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<ExternalLinkIcon className="size-4" />
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</button>
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) : null}
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<button
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type="button"
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className={iconBtnClass}
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aria-label="关闭"
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onClick={onRequestClose}
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>
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<XIcon className="size-4" />
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</button>
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</div>
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</div>
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<div className="relative flex min-h-0 min-w-0 flex-1 flex-col overflow-hidden">
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<LightboxImageBody
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pinchRef={pinchRef}
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rotationDeg={rotationDeg}
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src={src}
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alt={alt}
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/>
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</div>
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<p className="sr-only">
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使用滚轮或双指缩放，按住拖拽可平移图片；工具栏可向左或向右旋转。
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</p>
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</div>
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</div>
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);
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}
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export function ImageLightboxView({
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open,
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onOpenChange,
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src,
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alt,
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}: ImageLightboxProps) {
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const dialogRef = useRef<HTMLDialogElement>(null);
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useEffect(() => {
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const el = dialogRef.current;
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if (!el) {
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return;
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}
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if (open && src) {
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if (!el.open) {
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el.showModal();
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}
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} else if (el.open) {
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el.close();
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}
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}, [open, src]);
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return (
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<dialog
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ref={dialogRef}
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className="cs-agent-image-lightbox fixed inset-0 z-[2147483646] m-0 flex h-full max-h-none w-full max-w-none flex-col border-0 bg-transparent p-0 [&:not([open])]:hidden"
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aria-modal="true"
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aria-labelledby="widget-image-lightbox-title"
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onClose={() => onOpenChange(false)}
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>
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{src ? (
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<ImageLightboxDialogContent
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key={src}
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alt={alt}
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src={src}
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onRequestClose={() => onOpenChange(false)}
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/>
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) : null}
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</dialog>
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);
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}
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export function ImageLightboxProvider({ children }: { children: ReactNode }) {
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const [state, setState] = useState<ImageLightboxItem | null>(null);
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const open = useCallback((src: string, alt?: string) => {
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const trimmed = src?.trim();
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if (!trimmed) {
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return;
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}
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setState({ src: trimmed, alt });
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}, []);
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const close = useCallback(() => {
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setState(null);
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}, []);
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const contextValue = useMemo(
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() => ({
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open,
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close,
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}),
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[open, close],
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);
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return (
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<ImageLightboxContext.Provider value={contextValue}>
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{children}
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<ImageLightboxView
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open={state !== null}
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onOpenChange={(next) => {
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if (!next) {
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setState(null);
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}
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}}
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src={state?.src ?? null}
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alt={state?.alt}
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/>
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</ImageLightboxContext.Provider>
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);
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}
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