Add "scroll amount" setting

src/modules/reader/components/ReaderHotkeys.tsx

@@ -18,7 +18,6 @@ import {
     AUTO_SCROLL_SPEED,
     CONTINUOUS_READING_MODE_TO_SCROLL_DIRECTION,
     READER_PAGE_SCALE_MODE_VALUES,
-    ReaderScrollAmount,
     READING_DIRECTION_VALUES,
     READING_MODE_VALUES,
 } from '@/modules/reader/constants/ReaderSettings.constants.tsx';
@@ -79,6 +78,7 @@ export const ReaderHotkeys = ({
         readingMode,
         readingDirection,
         autoScroll,
+        scrollAmount,
     } = ReaderService.useSettings();
     const automaticScrolling = useReaderAutoScrollContext();
     const { setShowPreview } = useReaderTapZoneContext();
@@ -106,10 +106,10 @@ export const ReaderHotkeys = ({
                 openChapter,
                 setIsOverlayVisible,
                 setShowPreview,
-                ReaderScrollAmount.SMALL,
+                scrollAmount,
             ),
         { preventDefault: true },
-        [readingMode.value, readingDirection.value, themeDirection, openChapter],
+        [readingMode.value, readingDirection.value, themeDirection, openChapter, scrollAmount],
     );
     useHotkeys(
         hotkeys[ReaderHotkey.SCROLL_FORWARD],
@@ -125,10 +125,10 @@ export const ReaderHotkeys = ({
                 openChapter,
                 setIsOverlayVisible,
                 setShowPreview,
-                ReaderScrollAmount.SMALL,
+                scrollAmount,
             ),
         { preventDefault: true },
-        [readingMode.value, readingDirection.value, themeDirection, openChapter],
+        [readingMode.value, readingDirection.value, themeDirection, openChapter, scrollAmount],
     );
     useHotkeys(
         hotkeys[ReaderHotkey.PREVIOUS_CHAPTER],

src/modules/reader/components/settings/behaviour/ReaderBehaviourSettings.tsx

@@ -18,6 +18,7 @@ import { isOffsetDoubleSpreadPagesEditable } from '@/modules/reader/utils/Reader
 import { SliderInput } from '@/modules/core/components/inputs/SliderInput.tsx';
 import { DEFAULT_READER_SETTINGS } from '@/modules/reader/constants/ReaderSettings.constants.tsx';
 import { ReaderSettingAutoScroll } from '@/modules/reader/components/settings/behaviour/ReaderSettingAutoScroll.tsx';
+import { ReaderSettingScrollAmount } from '@/modules/reader/components/settings/behaviour/ReaderSettingScrollAmount.tsx';
 
 export const ReaderBehaviourSettings = ({
     settings,
@@ -37,6 +38,10 @@ export const ReaderBehaviourSettings = ({
                 exitMode={settings.exitMode}
                 setExitMode={(value) => updateSetting('exitMode', value)}
             />
+            <ReaderSettingScrollAmount
+                scrollAmount={settings.scrollAmount}
+                setScrollAmount={(value) => updateSetting('scrollAmount', value)}
+            />
             <CheckboxInput
                 label={t('reader.settings.label.skip_dup_chapters')}
                 checked={settings.shouldSkipDupChapters}

src/modules/reader/components/settings/behaviour/ReaderSettingScrollAmount.tsx

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import { useTranslation } from 'react-i18next';
+import { IReaderSettings } from '@/modules/reader/types/Reader.types.ts';
+import { ValueToDisplayData } from '@/modules/core/Core.types.ts';
+import { ButtonSelectInput } from '@/modules/core/components/inputs/ButtonSelectInput.tsx';
+import { ReaderScrollAmount } from '@/modules/reader/constants/ReaderSettings.constants.tsx';
+
+const VALUE_TO_DISPLAY_DATA: ValueToDisplayData<ReaderScrollAmount> = {
+    [ReaderScrollAmount.SMALL]: {
+        title: 'global.label.small',
+        icon: null,
+    },
+    [ReaderScrollAmount.MEDIUM]: {
+        title: 'global.label.medium',
+        icon: null,
+    },
+    [ReaderScrollAmount.LARGE]: {
+        title: 'global.label.large',
+        icon: null,
+    },
+};
+
+const READER_SCROLL_AMOUNT_VALUES = Object.values(ReaderScrollAmount).filter((value) => typeof value === 'number');
+
+export const ReaderSettingScrollAmount = ({
+    scrollAmount,
+    setScrollAmount,
+}: Pick<IReaderSettings, 'scrollAmount'> & {
+    setScrollAmount: (amount: ReaderScrollAmount) => void;
+}) => {
+    const { t } = useTranslation();
+
+    return (
+        <ButtonSelectInput
+            label={t('reader.settings.scroll_amount')}
+            value={scrollAmount}
+            values={READER_SCROLL_AMOUNT_VALUES}
+            setValue={setScrollAmount}
+            valueToDisplayData={VALUE_TO_DISPLAY_DATA}
+        />
+    );
+};