dbltap

frontend/src/detail/PreviewZoomOverlay.jsx

@@ -1,6 +1,7 @@
 import React, { useEffect, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { ArrowLeftIcon, ArrowRightIcon } from '../ui/icons';
+import usePointerTap from '../ui/usePointerTap';
 
 const noop = () => {};
 
@@ -36,7 +37,6 @@ const PreviewZoomOverlay = ({
   const previouslyFocusedRef = useRef(null);
   const visibilityTimerRef = useRef(null);
   const displayTimerRef = useRef(null);
-  const clickTimerRef = useRef(null);
 
   useEffect(() => {
     if (display?.url) {
@@ -89,20 +89,12 @@ const PreviewZoomOverlay = ({
     if (displayTimerRef.current) {
       cancelAnimationFrame(displayTimerRef.current);
     }
-    if (clickTimerRef.current) {
-      clearTimeout(clickTimerRef.current);
-      clickTimerRef.current = null;
-    }
   }, []);
 
   useEffect(() => {
     setIsNativeScale(false);
     setNaturalSize({ width: null, height: null });
     focusRef.current = null;
-    if (clickTimerRef.current) {
-      clearTimeout(clickTimerRef.current);
-      clickTimerRef.current = null;
-    }
     const scrollEl = scrollRef.current;
     if (scrollEl) {
       scrollEl.scrollLeft = 0;
@@ -203,13 +195,6 @@ const PreviewZoomOverlay = ({
     }
   };
 
-  if (!renderBackdrop || !activeDisplay?.url || !portalTarget) {
-    return null;
-  }
-
-  const effectiveDisplay = activeDisplay;
-  const navVisible = Boolean(effectiveDisplay?.canGoPrev || effectiveDisplay?.canGoNext);
-
   const toggleZoomAtPoint = (clientX, clientY) => {
     const img = imageRef.current;
     setIsNativeScale((current) => {
@@ -228,26 +213,27 @@ const PreviewZoomOverlay = ({
     });
   };
 
+  const pointerTapHandler = usePointerTap({
+    delay: CLICK_DELAY_MS,
+    onSingle: () => {
+      onClose();
+    },
+    onDouble: ({ clientX, clientY }) => {
+      toggleZoomAtPoint(clientX, clientY);
+    },
+  });
+
   const handleImagePointerDown = (event) => {
     event.stopPropagation();
-    if (event.button && event.button !== 0) {
-      return;
-    }
-    if (event.pointerType === 'touch' && event.isPrimary === false) {
-      return;
-    }
-    if (clickTimerRef.current) {
-      clearTimeout(clickTimerRef.current);
-      clickTimerRef.current = null;
-      toggleZoomAtPoint(event.clientX, event.clientY);
-      return;
-    }
-
-    clickTimerRef.current = setTimeout(() => {
-      clickTimerRef.current = null;
-      onClose();
-    }, CLICK_DELAY_MS);
+    pointerTapHandler(event);
   };
+
+  if (!renderBackdrop || !activeDisplay?.url || !portalTarget) {
+    return null;
+  }
+
+  const effectiveDisplay = activeDisplay;
+  const navVisible = Boolean(effectiveDisplay?.canGoPrev || effectiveDisplay?.canGoNext);
   const stageClassName = [
     'preview-zoom__stage',
   ]