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Add page-flip animation to Reading Mode #621

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Merged
realproject7 merged 1 commit into from
Mar 27, 2026
Merged

Add page-flip animation to Reading Mode #621

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16 changes: 16 additions & 0 deletions src/app/globals.css
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Original file line number Diff line number Diff line change
Expand Up @@ -210,6 +210,22 @@ code, pre, .font-mono {
}
}

/* Reading Mode page-flip transitions */
@keyframes flip-in-left {
from { opacity: 0; transform: translateX(40px); }
to { opacity: 1; transform: translateX(0); }
}
@keyframes flip-in-right {
from { opacity: 0; transform: translateX(-40px); }
to { opacity: 1; transform: translateX(0); }
}
.page-flip-left {
animation: flip-in-left 0.25s ease-out;
}
.page-flip-right {
animation: flip-in-right 0.25s ease-out;
}

/* Custom select dropdown styling */
select {
appearance: none;
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37 changes: 22 additions & 15 deletions src/components/ReadingMode.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@
}

export function ReadingMode({
storylineId,

Check warning on line 22 in src/components/ReadingMode.tsx

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'storylineId' is defined but never used
storylineTitle,
chapters,
initialChapterIndex,
Expand All @@ -27,6 +27,7 @@
}: ReadingModeProps) {
const [currentIdx, setCurrentIdx] = useState(initialChapterIndex);
const [showToc, setShowToc] = useState(false);
const [flipDir, setFlipDir] = useState<"left" | "right" | null>(null);
const contentRef = useRef<HTMLDivElement>(null);
const { isMiniApp } = usePlatformDetection();

Expand All @@ -38,25 +39,29 @@
contentRef.current?.scrollTo(0, 0);
}, []);

const goPrev = useCallback(() => {
if (hasPrev) {
setCurrentIdx((i) => i - 1);
const navigate = useCallback((idx: number, dir: "left" | "right" | null) => {
setFlipDir(dir);
// Brief delay to trigger the CSS animation before content swap
requestAnimationFrame(() => {
setCurrentIdx(idx);
scrollToTop();
}
}, [hasPrev, scrollToTop]);
// Clear the animation class after transition completes
setTimeout(() => setFlipDir(null), 250);
});
}, [scrollToTop]);

const goPrev = useCallback(() => {
if (hasPrev) navigate(currentIdx - 1, "right");
}, [hasPrev, currentIdx, navigate]);

const goNext = useCallback(() => {
if (hasNext) {
setCurrentIdx((i) => i + 1);
scrollToTop();
}
}, [hasNext, scrollToTop]);
if (hasNext) navigate(currentIdx + 1, "left");
}, [hasNext, currentIdx, navigate]);

const goToChapter = useCallback((idx: number) => {
setCurrentIdx(idx);
setShowToc(false);
scrollToTop();
}, [scrollToTop]);
navigate(idx, idx > currentIdx ? "left" : "right");
}, [currentIdx, navigate]);

// Esc to close, arrow keys for navigation
useEffect(() => {
Expand Down Expand Up @@ -105,8 +110,10 @@
</div>

{/* Content area */}
<div ref={contentRef} className="flex-1 overflow-y-auto">
<div className="mx-auto max-w-[720px] px-6 py-8 sm:px-8 sm:py-12">
<div ref={contentRef} className="flex-1 overflow-y-auto overflow-x-hidden">
<div className={`mx-auto max-w-[720px] px-6 py-8 sm:px-8 sm:py-12 ${
flipDir === "left" ? "page-flip-left" : flipDir === "right" ? "page-flip-right" : ""
}`}>
{chapter?.content ? (
<StoryContent content={chapter.content} />
) : (
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