* Optimized PDF tile rendering performance and quality.
* Added support for adjusting TTS voice speed and pitch.
* Updated the TTS settings UI and playback logic to support real-time parameter adjustments.
* Added horizontal scrolling to the PDF viewer bottom toolbar and updated tool arrangement to use fixed spacing.
* Refined cross-page selection and text extraction in `PaginatedReader`
* Updated EPUB reader styling logic to refine typography and layout controls.
* Bump version to 1.0.42(43)
* Improved navigation and search result highlighting in the EPUB reader
* refactor: implement JIT chunk restoration for robust navigation
- Fixes search and bookmark navigation failing in same-chapter transitions.
- Introduced JIT (Just-in-Time) HTML restoration in `epub_reader.js` to
re-populate virtualized chunks before CFI resolution or search scrolling.
- Synchronized search highlighting and user highlights within
newly-restored chunk segments.
- Improved search navigation accuracy by mapping occurrences to
relative chunk indices.
* Implemented a custom text selection engine for the paginated EPUB reader to support cross-page selection and improved handle interaction.
* Implemented management of external file behavior and improved library filtering.
* Added support for toolbar customization in the EPUB reader.
* Added support for toolbar customization in the PDF reader.
* fix: rendering during auto-scroll and navigation on long pages
* Added a "Scroll to Top" feature to the auto-scroll controls in both EPUB and PDF readers.
* Updated folder synchronization logic and redesigned the file type filter dialog.
* Fixed CFI generation and navigation stability in the EPUB reader.
* Improved CFI scrolling and position calculation in the EPUB reader by implementing text node traversal using `TreeWalker`. This ensures accurate positioning and scrolling when a CFI offset spans multiple fragmented text nodes.
* fix fb2 multiline titles, retain footnotes, and prevent stream leaks
- Fix FB2 titles with multiple paragraphs by inserting breaks/spaces
- Prevent resource leaks by properly closing InputStreams in all importers
- Retain "notes" and "comments" sections in FB2 instead of skipping them
- Add support for FB2 poem, stanza, cite, and link tags
* Implement persistence for zoom and pan states when pan lock is enabled in the PDF reader.
* Added `FileTypeBadge` to home and library screens
* Bump version to 1.0.41(42)
* Added support for highlight notes in EPUB reader
* fix(epub annots): ensure persistent highlights and preserve notes on color change
- refactor: unified processAndAddHighlight across scroll and paginated modes
- fix: re-apply highlights to virtualized DOM elements on chunk load
- fix: replaced '|' with ';;' in JS bridge to prevent CFI parsing errors
* feat(epub): redesign annotation UX with theme-aware Bottom Sheet
* Updated highlight handling to use full CFI strings instead of splitting into parts during deletion and style updates. Adjusted `processAndAddHighlight` to return the final CFI and updated the delete button UI to use a contained button style.
* Added support for notes in PDF highlights.
* Implemented support for custom highlight colors in the PDF reader.
* Improved PDF annotation notes and theme handling in the bottom sheet.
* Improved eraser hit detection and added horizontal scrolling to AnnotationDock
* fix: lock scroll tracking during PDF rotation to prevent page jumping in vertical mode
* Implemented a multi-tab reading system for the PDF viewer.
* Redesigned the About dialog on homescreen.
* improved bulk file import support
* Implemented document caching and improved tab restoration in the PDF viewer.
* Implemented native link detection and information extraction in `pdfium_bridge.cpp` and integrated it into `PdfPageComposable.kt`. This includes adding `getLinkInfoAtPoint` to `NativePdfiumBridge` to handle URI, GoTo, and RemoteGoTo/Launch actions, and updating the tap gesture logic to prioritize native link handling.
* Fixed index bounds and layout padding calculation in PdfViewerScreen
* feat(EPUB): adapt status bar icon visibility to reader theme
Pass the reader's active isDarkTheme state to EpubReaderSystemUiController to ensure status bar icons automatically switch between light and dark to remain visible against the selected background/page color.
* Implement storage tracking and optimize cache management
This commit introduces a `StorageTracker` to monitor disk usage and implements several optimizations to prevent cache bloat and handle orphaned files.
* refactor: unify book extraction paths and fix cache leaks
- Replaced random UUID and title-based hashing with stable `bookId` for extraction directories across Epub, Mobi, and FB2 parsers.
- Standardized all temporary extraction paths to `cache/imported_file_${bookId}`.
- Updated MainViewModel and MetadataExtractionWorker to provide the mandatory `bookId` during parsing.
- Ensured `clearImportedFileCache` successfully targets the correct directories on book deletion.
- Added a legacy cleanup task in `sweepOrphanedCache` to reclaim storage from old `extracted_epubs` folders.
* fix(pdf): handle NoClassDefFoundError for PdfPasswordException
Updated the PDF loading logic in PdfViewerScreen to catch Throwable
instead of Exception. This prevents the app from crashing when the
underlying pdfium library attempts to throw a PdfPasswordException
that is missing from the runtime classpath (NoClassDefFoundError).
* fix(tts): set language before voice to prevent variant reset
* EpubReaderScreen: increase scroll-hide ignore duration for tap toggles
Increase the threshold for ignoring tap toggles after bars are hidden by scrolling from 250ms to 400ms. This prevents accidental UI toggles caused by "sloppy taps" immediately following a scroll action.
* fix: resolve large bitmap crash on tall PDF pages
- Caps base layer bitmap dimensions to 3000px to prevent GPU texture limit crashes.
- Enables tiled rendering for large pages even at 1x zoom to maintain sharpness.
- Optimizes PdfBitmapPool to support rectangular bitmap allocations.
* Common.kt: ensure unique keys in voice list
* fix: handle ActivityNotFoundException in folder sync screen
* Improve file deletion logic and fix chapter index bounds in epub reader
* fix: ensure WebView bridge callbacks run on UI thread
This resolves a WebViewMethodCalledOnWrongThreadViolation in vertical mode that was preventing chapter chunks from loading beyond the initial viewport.
* Improve PDF rendering quality and performance.
- Set `FilterQuality.High` when drawing base bitmaps and high-res tiles in `PdfPageComposable`.
- Implement `inSampleSize` calculation in `UniversalDocument` to optimize memory usage during region decoding.
- Enhance bitmap drawing quality by adding `ANTI_ALIAS_FLAG` and `DITHER_FLAG` to the paint configuration.
* Implement custom reader themes for PDF viewer.
This change integrates the `ReaderThemePanel` and theme management logic into the PDF viewer, allowing users to apply preset or custom themes. Previously, the PDF viewer only supported a simple dark mode toggle.
Specific changes:
- Moved `ReaderTheme`, `ReaderTexture`, and theme-related utility functions from `EpubReaderScreen.kt` to `Common.kt` to allow sharing between EPUB and PDF readers.
- Updated `PdfPageComposable` to use `activeTheme` instead of `isDarkMode`, implementing a `ColorMatrix` to apply custom background and text colors to PDF pages.
- Replaced the dark mode toggle in `PdfViewerScreen` with a theme selection button that opens `ReaderThemePanel`.
- Introduced `PdfBuiltInThemes` to provide PDF-specific theme presets.
* Reset page transformation on constraint changes and refine tile rendering logic.
- Reset scale to 1.0 and offset to zero in `PdfPageComposable` when constraints change.
- Update `UniversalDocument` to use floating-point precision for source rectangle calculations and `RectF` for destination mapping to improve rendering accuracy.
* Improve eraser hit detection and visual thickness settings in PDF reader.
* Added support for FB2 book format
* Add support for CBZ files by introducing a `ReaderDocument` abstraction.
Key changes:
- Defined `ReaderDocument`, `ReaderPage`, and `ReaderTextPage` interfaces to provide a unified API for different document types.
- Implemented `PdfDocumentWrapper` and `CbzDocumentWrapper` to handle PDF and CBZ files respectively.
- Updated `PdfViewerScreen`, `PdfPageComposable`, and `MainViewModel` to use the new unified document interfaces.
- Added CBZ file type detection and cover generation logic.
* Add support for CBR and CB7 comic book formats
- Add `me.zhanghai.android.libarchive` dependency to support RAR and 7z archives.
- Implement `ArchiveDocumentWrapper` using `libarchive` to handle CBZ, CBR, and CB7 files uniformly, replacing the previous CBZ-only implementation.
- Update `MainViewModel` and `DocumentFactory` to recognize and process `.cbr` and `.cb7` extensions and their associated MIME types.
- Add support for extracting and caching cover images from CBR and CB7 archives.
- Update UI components (`HomeScreen`, `LibraryScreen`, `AppNavigation`) to handle the new comic book file types.
* Improved PDF embedded annotation hit detection logic
* Updated EPUB and PDF reader logic to improve position tracking and TTS stability.
Key changes:
- Refined CFI and locator handling in `EpubReaderScreen` with improved initialization.
- Updated `BookPaginator` to more accurately calculate text offsets in chunks and improve CFI matching logic.
- Modified `TtsPlaybackManager` to insert media items at the correct index, ensuring proper playback order.
- Simplified `EpubReaderTts` page scrolling by removing conditional checks for backward jumps.
- Disabled OCR fallback in `PdfViewerScreen` during text extraction for TTS.
* Updated extractTextWithCfiFromTop to use getBoundingClientRect for identifying the starting block
* Optimized high-res scale logic in PdfVerticalReader and adjusted layout padding in PdfViewerScreen
* Fixed position sync between both PDF reading modes
* Enabled annotation rendering in PDF tiles and improved scrolling state detection in `PdfVerticalReader` by introducing an `isDragging` flag.
* Added print functionality to PDF viewer
* feat(pdf): add interactive button support and visibility reveal heuristic
* Moved search state management to MainViewModel and improved search UI interaction.
* Updated `pdfiumandroid` to version 2.0.0 and handled resulting API changes, including nullable page/text page returns and revised native pointer access.
increased compileSdk to 36.
* Fixed Table of Contents (TOC) truncation bug and improved the TOC UI in `PdfViewerScreen`.
- Implemented `getFixedTableOfContents` using reflection to bypass a library issue where sibling nodes were incorrectly truncated during traversal.
- Enhanced the TOC drawer with a nested, expandable tree structure using the new `PdfTocTreeItem` component.
- Added a custom `VerticalScrollbar` with draggable support for better navigation within long TOC lists.
- Integrated `animateColorAsState` and `animateFloatAsState` for smoother UI transitions in the TOC and scrollbar.
- Optimized TOC loading by flattening the tree structure and managing expansion states with `rememberSaveable`.
* Improved zoom pivot calculation and interaction handling in PdfVerticalReader
* Fixed high-res PDF tile bleeding by implementing clipRect in PdfBitmapLayer
* fix(pdf): resolve zoom stuttering, in pagination mode, by removing eager scale snapping
* Added `TooltipIconButton` and integrated tooltips for tool icons in app bars
* Added external translate and search support for EPUB and PDF readers
* docs: refine project overview and update build instructions in readme
* Replaced PDF-to-Markdown reflow with an enhanced PDF-to-HTML generator.
Specific changes include:
- Replaced `PdfToMarkdownGenerator` and `PdfReflowGenerator` with `PdfToHtmlGenerator`.
- Added native bridge methods in `NativePdfiumBridge.kt` and `pdfium_bridge.cpp` to extract character bounding boxes, page objects, and image pixels.
- Implemented vertical merging of text and images in `PdfToHtmlGenerator` to maintain document layout.
- Added logic to detect and filter repeating headers and footers across PDF pages.
- Updated `ReflowWorker` to generate `.html` files instead of `.md` files and updated `FileType` handling.
- Simplified `SingleFileImporter` by removing dependencies on the legacy Markdown generator.
* Updated PDF to HTML generation to include page breaks and split HTML files into individual chapters based on page markers.
* Added junk character filtering and normalization to PDF text extraction
* - Added `allRecentFiles` to `ReaderScreenState` to track all files, including reflowed versions.
- Updated `recentFiles` in `MainViewModel` to filter out reflowed files (`_reflow`) from the main library view.
- Implemented `deleteBookPermanently` in `MainViewModel` to handle book deletion and cache cleanup.
- Added a "Delete Text View" option to the `EpubReader` controls for reflowed files.
- Improved reflow file detection in `PdfViewerScreen` by checking against `allRecentFiles`.
* Implemented a centralized data-saving mechanism in `PdfViewerScreen` using a debounced `saveAllData` function. This refactor consolidates the saving of annotations, text boxes, highlights, bookmarks, and scroll positions, adding lifecycle-aware triggers and a mutex to ensure data integrity during pauses or document navigation.
* Optimized PDF selection and annotation performance by offloading heavy operations to background threads and improving UI responsiveness.
- Moved PDF page/text opening, character range calculations, and text extraction to `Dispatchers.IO`.
- Wrapped UI updates in `updateSelectionVisuals` and selection logic with `withContext(Dispatchers.Main)`.
- Implemented a more efficient `Popup`-based magnifier to replace manual offsets and transformations.
- Updated `PdfSelectionMenuPopup` properties to prevent focus and click-outside dismissal conflicts.
* Added support for reading and displaying embedded PDF annotations.
Changes include:
- Added JNI bindings in `NativePdfiumBridge` and `pdfium_bridge.cpp` to extract annotation count, subtypes, rectangles, and string values (Contents, NM, IRT, T) using PDFium.
- Introduced `EmbeddedAnnotation` data class to represent PDF annotations and their reply threads.
- Implemented annotation extraction logic in `PdfPageComposable` to fetch, group, and map embedded annotations (Sticky Notes, Highlights, etc.) to screen coordinates.
- Updated `PdfSelectionMenuPopup` to support displaying and copying comment threads.
- Improved selection menu positioning and hit detection for annotations.
- Added a safety check to recycle bitmaps in `PdfTile` rendering if handover to the main thread fails.
* Improved comment thread UI
* feat(pdf): implement native text highlighting and interactive selection menu
- Add `PdfUserHighlight` data model to track page index, character ranges, and normalized coordinates.
- Redesign `PdfSelectionMenuPopup` to match the EPUB reader style, featuring a color palette row and a deletion option.
- Integrate highlight rendering into the `PdfPageSelectionsLayer` using Canvas drawing.
- Add hit-testing to `detectTapGestures` to allow users to tap existing highlights to change colors or remove them.
* Implemented PDF highlight persistence, sync, and exporting.
* Improved PDF highlight exporting and visibility logic
- Fixed PDF highlight rendering by correctly calculating coordinates and merging adjacent rectangles into lines.
- Updated `PdfExporter` to include highlights in the exported document and added debug logging.
- Corrected visibility check in `PdfPageComposable` to account for vertical offsets.
- Enhanced `PdfViewerScreen` highlight creation to use merged line rectangles
* Refactored annotation synchronization logic and improved background sync reliability.
- Refactored JSON bundle creation and extraction into reusable helper functions.
- Improved stale file detection by checking all annotation types (ink, text, layout, highlights, text boxes).
- Added background annotation downloading to `SyncWorker`
- Implemented duplicate file cleanup in `GoogleDriveRepository` during uploads.
- Added a `showFeedback` flag to `syncFolderMetadata` to control UI visibility during background operations.
- Fixed a potential data loss edge case by aborting Firestore sync if the bundle upload fails.
* Improved highlight interaction and management in PDF viewer
- Implemented hit tolerance for highlight selection to improve touch detection accuracy.
- Added logic to shift highlight page indices when adding or deleting pages.
- Included highlights in the auto-pruning check for empty pages.
- Added a "Highlights" tab to the navigation drawer to list, navigate to, and delete user highlights.
* perf: fix Home and Library screen stutter by removing main thread file checks
* feat(pdf): implement straight-line highlighter snap
- Added "Straight Line" toggle to highlighter settings popup with persistent state.
- Implemented "rubber-band" drawing effect for highlighters with cardinal direction snapping (0°, 90°, 180°, 270°).
- Optimized gesture loops in Vertical and Paginated readers to respond instantly to setting toggles.
- Rewrote eraser hit detection using point-to-line segment distance math for pixel-perfect erasure of straight lines.
* Added support for external dictionary apps and a dictionary settings sheet.
* Refactored external dictionary integration and improved package visibility
- Updated `AndroidManifest.xml` with `<queries>` for common dictionary apps and intent actions (`PROCESS_TEXT`, `SEARCH`, `SEND`) to support Android 11+ package visibility.
- Refactored `ExternalDictionaryHelper` to streamline dictionary discovery using `Intent.ACTION_PROCESS_TEXT` and `colordict.intent.action.SEARCH`.
- Added a package blocklist in `ExternalDictionaryHelper` to filter out system services (e.g., Samsung Pass, GMS) from dictionary lists.
- Simplified `launchDictionary` logic to prioritize `PROCESS_TEXT` intents.
- Fixed a bug in `PdfViewerScreen` to only show the dictionary upsell dialog when `useOnlineDictionary` is enabled.
* Refactored dictionary settings into a dialog and updated dictionary selection logic.
- Renamed `DictionarySettingsSheet` to `DictionarySettingsDialog` and converted it from a bottom sheet to a formal dialog.
- Redesigned the dictionary settings UI with a clearer distinction between AI and external app modes.
- Added a "Search" option to the external dictionary list that triggers a web search.
- Updated `ExternalDictionaryHelper` to include a package blocklist and support for generic web search intents.
- Simplified `PdfHelper` by removing Pro user checks for the "Dictionary" action.
- Updated icons for dictionary settings across the EPUB and PDF readers.
This change introduces a "Stylus Only Mode" toggle in the annotation dock, allowing users to restrict drawing input to stylus pens while maintaining touch support for scrolling and navigation.
Key changes include:
- Added `isStylusOnlyMode` state and persistence logic in `PdfViewerScreen`.
- Updated `AnnotationDock` with a toggle button for the new mode.
- Modified pointer input handling in `PdfPageComposable` and `PdfVerticalReader` to filter touch events when stylus-only mode is active.
- Adjusted tap gesture detection to ensure scrolling and page clicks still function correctly under various input modes.
Key changes:
* The `pdfiumandroid` directory, which contained the local library source, has been completely removed.
* The `settings.gradle.kts` file is updated to remove the `:pdfiumandroid` and `:pdfiumandroid:arrow` includes.
* The main `app/build.gradle.kts` is modified to depend on the published `io.legere:pdfiumandroid:1.0.35` artifact from a remote repository instead of the local project module.
* Code in `PdfPageComposable.kt` that depended on `PdfPageObjectType` and logic for handling image objects in dark mode has been removed, simplifying the rendering process.
- Add `isScrollLocked` state to `PdfViewerScreen` to toggle panning behavior.
- Replace "Import SVG" debug icon with a Lock/Unlock toggle in the Top App Bar.
- Update `PdfVerticalReader` and `PdfPageComposable` to strictly zero out X-axis pan deltas and fling velocities when locked.
- Maintain zoom and vertical scrolling functionality while panning is locked.
docs: Revamp README and add APK naming convention
This commit introduces a complete overhaul of the `README.md` to improve project presentation. Key changes include:
* Adds a new header with the app icon and a Google Play badge.
* Updates the feature graphic and includes a note distinguishing the OSS version from the Play Store version.
* Refines the "Open Source Libraries" section to be more structured.
* Moves the main preview image into the `docs` directory.
Additionally, the `app/build.gradle.kts` file is updated to configure a standardized naming convention for output APK files, including flavor, version, and build type.
* refactor copyright headers and fix README icon alignment
This commit introduces two main changes across the codebase:
The `spotless/copyright.kt` template have been updated for consistency:
* The author name is simplified from "Episteme Authors" to "Episteme".
* The contact email prefix is shortened from "Electronic mail:" to "mail:".
Second, the `README.md` file is adjusted to correct the vertical alignment of the app icon with the project title.
