This commit implements true page-based pagination for the ebook reader,
similar to Kindle's approach where content is split into discrete pages
based on viewport size, font settings, and content layout.
Phase 1 - Bug Fixes:
- Fix goToPage to use getScrollPositionForPage instead of treating
page numbers as spine indices
- Move page calculation to initialize before first render to avoid
race condition with scroll handler
- Add fallback page calculation when pageCalculationResult is null
Phase 2 - Page Splitting:
- Add new page-splitter.ts module with CFI-based splitting for EPUB
and height-based fallback for other formats
- Integrate splitContent into page-calculator to generate discrete
page content for each spine item
- Store pages[] array in ChapterPageInfo for rendering
- Rewrite navigation (nextPage, previousPage, renderSpineItem) to
use page-based approach with currentPage tracking
- Remove old scroll-based pagination from view-modes.ts
- Update paginated mode CSS for true page clipping
Phase 3 - Progress Display:
- Update progress-indicator to use currentPage directly instead of
calculating from scroll position
- Fix getCurrentPage in reader-state to return currentPage for ebooks
Phase 4 - Interface Fixes:
- Add currentPage field to UniversalReader interface
- Update sendProgressUpdate to use currentPage directly
- Initialize currentPage to 1 on reader creation
Key features:
- Dynamic page count based on font size, line height, margins
- CFI-based page splitting preserves reading context
- Falls back to height-based splitting for non-EPUB formats
- Progress display updates immediately on page change
- Settings changes trigger page recalculation and re-render
john-okeefe
1e7d13dc85