kangwan/ai-toy-patent-workflow
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix: keep hover previews near pointer

Browse Source
This commit is contained in:
kang
2026-05-20 19:50:56 +08:00
parent 5a05058dd0
commit cacb0bd40c
1 changed files with 43 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
src/components/HoverImagePreview.tsx
View File

@@ -1,12 +1,14 @@
'use client';
import { useState } from 'react';
import { useEffect, useState } from 'react';
import { createPortal } from 'react-dom';
import type { PointerEvent } from 'react';
type PreviewState = {
left: number;
top: number;
width: number;
height: number;
};
function parseRatio(aspectRatio?: string) {
@@ -18,17 +20,33 @@ function parseRatio(aspectRatio?: string) {
}
function nextPreviewState(event: PointerEvent<HTMLElement>, aspectRatio?: string): PreviewState {
const gap = 18;
const margin = 12;
const gap = 12;
const margin = 10;
const ratio = parseRatio(aspectRatio);
const maxWidth = ratio < 0.8 ? 380 : ratio > 1.35 ? 620 : 500;
const width = Math.min(maxWidth, Math.max(260, window.innerWidth * 0.38));
const height = Math.min(window.innerHeight * 0.82, width / ratio);
let left = event.clientX + gap;
let top = event.clientY + gap;
const maxWidth = ratio < 0.8 ? 340 : ratio > 1.35 ? 520 : 420;
const maxHeight = Math.min(window.innerHeight * 0.68, window.innerHeight - margin * 2);
let width = Math.min(maxWidth, Math.max(240, window.innerWidth * 0.28));
let height = width / ratio;
if (height > maxHeight) {
height = maxHeight;
width = height * ratio;
}
const canOpenRight = event.clientX + gap + width <= window.innerWidth - margin;
const canOpenLeft = event.clientX - gap - width >= margin;
let left = canOpenRight || !canOpenLeft
? event.clientX + gap
: event.clientX - width - gap;
const canOpenBelow = event.clientY + gap + height <= window.innerHeight - margin;
const canOpenAbove = event.clientY - gap - height >= margin;
let top = canOpenBelow || !canOpenAbove
? event.clientY + gap
: event.clientY - height - gap;
if (left + width > window.innerWidth - margin) {
left = event.clientX - width - gap;
left = window.innerWidth - width - margin;
}
if (top + height > window.innerHeight - margin) {
top = window.innerHeight - height - margin;
@@ -37,6 +55,7 @@ function nextPreviewState(event: PointerEvent<HTMLElement>, aspectRatio?: string
left: Math.max(margin, left),
top: Math.max(margin, top),
width,
height,
};
}
@@ -54,6 +73,11 @@ export function HoverImagePreview({
onImageLoad?: (image: HTMLImageElement) => void;
}) {
const [preview, setPreview] = useState<PreviewState | null>(null);
const [mounted, setMounted] = useState(false);
useEffect(() => {
setMounted(true);
}, []);
return (
<>
@@ -68,13 +92,18 @@ export function HoverImagePreview({
onPointerLeave={() => setPreview(null)}
onLoad={event => onImageLoad?.(event.currentTarget)}
/>
{preview && (
{preview && mounted && createPortal(
<div
className="pointer-events-none fixed z-[90] rounded-[8px] bg-white p-2 shadow-[0_24px_80px_-24px_rgba(0,0,0,0.86)] ring-1 ring-white/20"
style={{ left: preview.left, top: preview.top, width: preview.width }}
className="pointer-events-none fixed z-[90] overflow-hidden rounded-[8px] bg-white shadow-[0_24px_80px_-24px_rgba(0,0,0,0.86)] ring-1 ring-white/20"
style={{ left: preview.left, top: preview.top, width: preview.width, height: preview.height }}
>
<img src={src} alt="" className="max-h-[82vh] w-full object-contain" style={{ aspectRatio: parseRatio(aspectRatio) }} />
</div>
<img
src={src}
alt=""
className="h-full w-full object-contain"
/>
</div>,
document.body
)}
</>
);