設定画面 (#34) (#397)

Reviewed-on: #397
Co-authored-by: miteruzo <miteruzo@naver.com>
Co-committed-by: miteruzo <miteruzo@naver.com>

frontend/src/lib/clientAnimation.ts

@@ -0,0 +1,34 @@
+import type { Transition } from 'framer-motion'
+
+import type { ClientAnimationMode } from '@/lib/settings'
+
+type ClientAnimationTransitionOptions = {
+    normal:   Transition
+    reduced?: Transition
+    off?:     Transition }
+
+
+export const clientAnimationsOff = (
+    animationMode: ClientAnimationMode,
+): boolean =>
+    animationMode === 'off'
+
+
+export const clientAnimationTransition = (
+    animationMode: ClientAnimationMode,
+    { normal, reduced, off }: ClientAnimationTransitionOptions,
+): Transition => {
+  if (animationMode === 'off')
+    return off ?? { duration: 0 }
+
+  if (animationMode === 'reduced')
+    return reduced ?? { duration: .08, ease: 'linear' as const }
+
+  return normal
+}
+
+
+export const clientScrollBehaviour = (
+    animationMode: ClientAnimationMode,
+): ScrollBehavior =>
+    animationMode === 'off' ? 'auto' : 'smooth'