Fix reader page scaling with applied safe area inset

The safe area inset wasn't applied everywhere, which potentially caused the scrollbar to appear while the pages should be fitting the screen

fixes #1102

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased] (Preview)
 
+### Fixed
+
+- (**Reader**) Fix scrollbar appearing with "fit to widt/height/screen" page scale mode and applied safe area insets
+
 ## [20260509.01] (r3147) - 2026-05-09
 
 ### Fixed

src/features/reader/Reader.types.ts

@@ -350,6 +350,7 @@ export interface ReaderPagerProps
             | 'customFilter'
             | 'shouldStretchPage'
             | 'readerWidth'
+            | 'safeAreaInset'
         >,
         Pick<NavbarContextType, 'readerNavBarWidth'> {
     onLoad?: (pagesIndex: number, url: string, isPrimary?: boolean) => void;

src/features/reader/filters/ReaderRGBAFilter.tsx

@@ -17,6 +17,7 @@ const BaseReaderRGBAFilter = ({ readerNavBarWidth }: Pick<NavbarContextType, 're
         value: { red, green, blue, alpha, blendMode },
         enabled,
     } = useReaderSettingsStore((state) => state.customFilter.rgba);
+    const safeAreaInset = useReaderSettingsStore('safeAreaInset');
 
     if (!enabled) {
         return null;
@@ -26,10 +27,10 @@ const BaseReaderRGBAFilter = ({ readerNavBarWidth }: Pick<NavbarContextType, 're
         <Box
             sx={{
                 position: 'fixed',
-                top: 0,
+                top: safeAreaInset.top ? 'env(safe-area-inset-top)' : 0,
-                left: readerNavBarWidth,
+                left: `calc(${readerNavBarWidth}px - ${safeAreaInset.left ? 'env(safe-area-inset-left)' : '0px'})`,
-                right: 0,
+                right: safeAreaInset.right ? 'env(safe-area-inset-right)' : 0,
-                bottom: 0,
+                bottom: safeAreaInset.bottom ? 'env(safe-area-inset-bottom)' : 0,
                 pointerEvents: 'none',
                 background: `rgba(${red} ${green} ${blue} / ${alpha}%)`,
                 mixBlendMode: `${blendMode}`,

src/features/reader/settings/ReaderSettings.utils.tsx

@@ -12,6 +12,7 @@ import type {
     IReaderSettingsWithDefaultFlag,
     ProgressBarPositionAutoVertical,
     ReaderPagerProps,
+    SafeAreaInset,
 } from '@/features/reader/Reader.types.ts';
 import { ProgressBarPosition, ReaderPageScaleMode, ReadingMode } from '@/features/reader/Reader.types.ts';
 import type { MangaGenreInfo, MangaSourceNameInfo } from '@/features/manga/Manga.types.ts';
@@ -20,6 +21,7 @@ import { ReaderPagedPager } from '@/features/reader/viewer/pager/components/Read
 import { ReaderDoublePagedPager } from '@/features/reader/viewer/pager/components/ReaderDoublePagedPager.tsx';
 import { ReaderVerticalPager } from '@/features/reader/viewer/pager/components/ReaderVerticalPager.tsx';
 import { ReaderHorizontalPager } from '@/features/reader/viewer/pager/components/ReaderHorizontalPager.tsx';
+import { ScrollDirection } from '@/base/Base.types.ts';
 
 export const isOffsetDoubleSpreadPagesEditable = (readingMode: IReaderSettings['readingMode']): boolean =>
     readingMode === ReadingMode.DOUBLE_PAGE;
@@ -96,3 +98,13 @@ export const getProgressBarPosition = (
 
     return ProgressBarPosition.BOTTOM;
 };
+
+export const getSafeAreaInsets = (
+    safeAreaInset: SafeAreaInset,
+    direction: Exclude<ScrollDirection, ScrollDirection.XY>,
+): string[] => [
+    ...(direction === ScrollDirection.Y && safeAreaInset.top ? ['env(safe-area-inset-top)'] : []),
+    ...(direction === ScrollDirection.X && safeAreaInset.right ? ['env(safe-area-inset-right)'] : []),
+    ...(direction === ScrollDirection.Y && safeAreaInset.bottom ? ['env(safe-area-inset-bottom)'] : []),
+    ...(direction === ScrollDirection.X && safeAreaInset.left ? ['env(safe-area-inset-left)'] : []),
+];

src/features/reader/viewer/ReaderChapterViewer.tsx

@@ -52,6 +52,7 @@ const BaseReaderChapterViewer = ({
     retryFailedPagesKeyPrefix,
     readingMode,
     readerWidth,
+    safeAreaInset,
     pageScaleMode,
     shouldOffsetDoubleSpreads,
     readingDirection,
@@ -427,6 +428,7 @@ const BaseReaderChapterViewer = ({
                 customFilter={customFilter}
                 shouldStretchPage={shouldStretchPage}
                 readerWidth={readerWidth}
+                safeAreaInset={safeAreaInset}
                 readerNavBarWidth={readerNavBarWidth}
                 isPreloadMode={isPreloadMode}
                 resumeMode={resumeMode}

src/features/reader/viewer/ReaderViewer.tsx

@@ -108,6 +108,7 @@ const BaseReaderViewer = ({
         shouldStretchPage: state.shouldStretchPage.value,
         isStaticNav: state.isStaticNav,
     }));
+    const safeAreaInset = useReaderSettingsStore('safeAreaInset');
     const { resumeMode = ReaderResumeMode.START } = useLocation<ReaderOpenChapterLocationState>().state ?? {
         resumeMode: ReaderResumeMode.START,
     };
@@ -337,6 +338,7 @@ const BaseReaderViewer = ({
                         retryFailedPagesKeyPrefix={retryFailedPagesKeyPrefix}
                         readingMode={readingMode}
                         readerWidth={readerWidth}
+                        safeAreaInset={safeAreaInset}
                         pageScaleMode={pageScaleMode}
                         shouldOffsetDoubleSpreads={shouldOffsetDoubleSpreads}
                         readingDirection={readingDirection}

src/features/reader/viewer/components/ReaderPage.tsx

@@ -19,6 +19,8 @@ import { applyStyles } from '@/base/utils/ApplyStyles.ts';
 import { MediaQuery } from '@/base/utils/MediaQuery.tsx';
 import type { NavbarContextType } from '@/features/navigation-bar/NavigationBar.types.ts';
 import { useReaderScrollbarStore } from '@/features/reader/stores/ReaderStore.ts';
+import { ScrollDirection } from '@/base/Base.types.ts';
+import { getSafeAreaInsets } from '@/features/reader/settings/ReaderSettings.utils.tsx';
 
 const getCustomFilterString = (customFilter: ReaderCustomFilter): string =>
     Object.keys(customFilter)
@@ -63,6 +65,7 @@ const BaseReaderPage = ({
     pageScaleMode,
     shouldStretchPage,
     readerWidth,
+    safeAreaInset,
     onLoad,
     onError,
     setRef,
@@ -70,7 +73,10 @@ const BaseReaderPage = ({
     isLoaded,
     ...props
 }: Omit<SpinnerImageProps, 'spinnerStyle' | 'imgStyle' | 'onLoad' | 'onError'> &
-    Pick<IReaderSettings, 'readingMode' | 'customFilter' | 'pageScaleMode' | 'shouldStretchPage' | 'readerWidth'> &
+    Pick<
+        IReaderSettings,
+        'readingMode' | 'customFilter' | 'pageScaleMode' | 'shouldStretchPage' | 'readerWidth' | 'safeAreaInset'
+    > &
     Pick<NavbarContextType, 'readerNavBarWidth'> & {
         pageIndex: number;
         pagesIndex: number;
@@ -115,8 +121,8 @@ const BaseReaderPage = ({
                     shouldStretchPage,
                     pageScaleMode,
                     readerWidth,
-                    readerNavBarWidth + scrollbar.ySize,
+                    [readerNavBarWidth, scrollbar.ySize, ...getSafeAreaInsets(safeAreaInset, ScrollDirection.X)],
-                    scrollbar.xSize,
+                    [scrollbar.xSize, ...getSafeAreaInsets(safeAreaInset, ScrollDirection.Y)],
                     doublePage,
                     isTabletWidth,
                 ),
@@ -132,8 +138,8 @@ const BaseReaderPage = ({
                     pageScaleMode,
                     doublePage,
                     readerWidth,
-                    readerNavBarWidth + scrollbar.ySize,
+                    [readerNavBarWidth, scrollbar.ySize, ...getSafeAreaInsets(safeAreaInset, ScrollDirection.X)],
-                    scrollbar.xSize,
+                    [scrollbar.xSize, ...getSafeAreaInsets(safeAreaInset, ScrollDirection.Y)],
                 ),
                 filter: getCustomFilterString(customFilter),
                 objectFit: 'contain',

src/features/reader/viewer/pager/ReaderPager.utils.tsx

@@ -56,25 +56,28 @@ const getPageWidthPercentage = (
     return 1;
 };
 
+const joinOffsetsForCssCalc = (offsets: (number | string)[], operator: '-' | '+' = '-'): string =>
+    offsets.map((offset) => (typeof offset === 'number' ? `${offset}px` : offset)).join(` ${operator} `);
+
 export const getImagePlaceholderStyling = (
     readingMode: IReaderSettings['readingMode'],
     shouldStretchPage: IReaderSettings['shouldStretchPage'],
     pageScaleMode: IReaderSettings['pageScaleMode'],
     readerWidth: IReaderSettings['readerWidth'],
-    widthOffset: number,
+    widthOffset: (number | string)[],
-    heightOffset: number,
+    heightOffset: (number | string)[],
     isDoublePage?: boolean,
     isTabletWidth?: boolean,
 ): CSSObject => {
     const OVER_9000 = 9000;
 
-    const getMaxWidth = (width: string) => `calc(${width} - ${widthOffset}px)`;
+    const getMaxWidth = (width: string) => `calc(${width} - ${joinOffsetsForCssCalc(widthOffset)})`;
     const getDesktopWidth = (width: number, readerWidthValue?: number) =>
         getMaxWidth(`${coerceIn(readerWidthValue ?? width, Math.min(width, readerWidthValue ?? OVER_9000), width)}vw`);
 
     const setReaderWidth = getSetReaderWidth(readerWidth, pageScaleMode);
     const fullWidth = getMaxWidth(`${Math.min(100, setReaderWidth ?? OVER_9000)}vw`);
-    const fullHeight = `calc(100vh - ${heightOffset}px)`;
+    const fullHeight = `calc(100vh - ${joinOffsetsForCssCalc(heightOffset)})`;
 
     const DEFAULT_SINGLE_PAGE_WIDTH = isTabletWidth ? fullWidth : getDesktopWidth(40, setReaderWidth);
     const DEFAULT_SINGLE_PAGE_HEIGHT = isTabletWidth ? fullHeight : '85vh';
@@ -151,11 +154,11 @@ const getReaderDimensionStyling = (
     readingMode: IReaderSettings['readingMode'],
     shouldStretchPage: IReaderSettings['shouldStretchPage'],
     pageScaleMode: IReaderSettings['pageScaleMode'],
-    widthOffset: number,
+    widthOffset: (number | string)[],
-    heightOffset: number,
+    heightOffset: (number | string)[],
 ): CSSObject => {
-    const fullWidth = `calc((100vw - ${widthOffset}px) * ${widthPercentage})`;
+    const fullWidth = `calc((100vw - ${joinOffsetsForCssCalc(widthOffset)}) * ${widthPercentage})`;
-    const fullHeight = `calc(100vh - ${heightOffset}px)`;
+    const fullHeight = `calc(100vh - ${joinOffsetsForCssCalc(heightOffset)})`;
 
     switch (pageScaleMode) {
         case ReaderPageScaleMode.WIDTH:
@@ -216,8 +219,8 @@ export const getReaderImageStyling = (
     pageScaleMode: IReaderSettings['pageScaleMode'],
     isDoublePage: boolean,
     readerWidth: IReaderSettings['readerWidth'],
-    widthOffset: number,
+    widthOffset: (number | string)[],
-    heightOffset: number,
+    heightOffset: (number | string)[],
 ): CSSObject => {
     const widthPercentage = getPageWidthPercentage(pageScaleMode, isDoublePage, readerWidth, true);
     return getReaderDimensionStyling(
@@ -292,6 +295,7 @@ export const createReaderPage = (
     pageScaleMode: IReaderSettings['pageScaleMode'],
     shouldStretchPage: IReaderSettings['shouldStretchPage'],
     readerWidth: IReaderSettings['readerWidth'],
+    safeAreaInset: IReaderSettings['safeAreaInset'],
     readerNavBarWidth: NavbarContextType['readerNavBarWidth'],
     retryKeyPrefix?: string,
     position?: 'left' | 'right',
@@ -322,6 +326,7 @@ export const createReaderPage = (
         pageScaleMode={pageScaleMode}
         shouldStretchPage={shouldStretchPage}
         readerWidth={readerWidth}
+        safeAreaInset={safeAreaInset}
         readerNavBarWidth={readerNavBarWidth}
     />
 );

src/features/reader/viewer/pager/components/BasePager.tsx

@@ -35,6 +35,7 @@ const BaseBasePager = ({
     pageScaleMode,
     shouldStretchPage,
     readerWidth,
+    safeAreaInset,
     readerNavBarWidth,
     resumeMode,
     handleAsInitialRender,
@@ -52,6 +53,7 @@ const BaseBasePager = ({
             pageScaleMode: ReaderPagerProps['pageScaleMode'],
             shouldStretchPage: ReaderPagerProps['shouldStretchPage'],
             readerWidth: ReaderPagerProps['readerWidth'],
+            safeAreaInset: ReaderPagerProps['safeAreaInset'],
             readerNavBarWidth: ReaderPagerProps['readerNavBarWidth'],
         ) => ReactNode;
         slots?: { boxProps?: BoxProps };
@@ -125,6 +127,7 @@ const BaseBasePager = ({
                     pageScaleMode,
                     shouldStretchPage,
                     readerWidth,
+                    safeAreaInset,
                     readerNavBarWidth,
                 ),
             )}