calibre

New features

• macOS: Various improvements to dark mode support
• Viewer: Dont generate covers for books that dont have a cover. Note that because of this all previously opened books will again be prepared for first time reading.
• Viewer: Restore print to PDF functionality
• Viewer: Allow also jumping to book positions in Goto->Location
• Content server: When adding books and a duplicate is suspected provide more information about what books match the duplicate
• FB2 Output: Speed up conversion of images and handle external links
• Viewer: If the book has no ToC try to generate one from headings, if any.
• Viewer: Improve rendering of comics. No blank pages after large images or after every image in multi-page mode.
• Viewer: Make it easier to use the bookmarks panel with only keyboard.
• Viewer: Set the classes calibre-viewer-paginated and calibre-viewer-scrolling on the tag in Paged and Flow modes. This allows the User styles to target these modes, if needed.
• Viewer: Use the same loading spinner as is used by the rest of calibre

Bug fixes

• Edit book: Fix a crash when editing CSS files caused by a behavior change in Qt 5.13.
• Fix a regression in 4.0 that broke rendering of PDF covers for PDF files that used JPEG2000 compression.
• Viewer: Fix a regression in 4.1 that broke creating new color schemes
• Viewer: Fix error while viewing books with a comment after a tag.
• Viewer: Fix an error when processing a CFI with an invalid text offset.
• Viewer: Fix scrolling backwards to previous chapter not always scrolling to the end of the chapter, if the chapter loads external resources.
• Viewer: Fix hang on books with namespaced attributes on that do not belong to a known ebook namespace.
• Viewer: Fix search history not persisting between viewer restarts.
• Viewer: Fix scrollbar showing up on initial book open even if disabled in preferences.
• Viewer: Fix rendering of books with mathematics failing
• Viewer: When changing between individual sections/chapters in the book, only render the new chapter after loading is complete
• Viewer: Fix scrolling by screenfuls not working correctly in flow mode
• EPUB 2 metadata: Fix obfuscated fonts being broken when updating metadata if the file uses Adobe font obfuscation and the identifier with the key has an uppercase UUID scheme name.
• Viewer: Fix right clicking on margins not showing controls
• Viewer: Preselect text in search box when showing it.
• Viewer: Fix SVG images that use xlink:href to refer to paths not being displayed.
• Content server: Fix detection of iOS on iPAD with iOS 13 which defaults to desktop mode
• Metadata jacket: Fix
  tags in the comments not being rendered correctly when inserting the comments into the jacket page.
• Viewer: Show nicer error message for DRMed books
• Viewer: Fix preferences under Scrolling behavior not being saved correctly
• Viewer: Fix remembered position sometimes off by one page in paged mode.
• Viewer: restrict max size of margin page turn indicators to 25px rather than 75px
• Viewer: Dont flash the home page before loading a book if a book has been specified
• Viewer: Fix ctrl+m shortcut not working on windows
• Content server: Fix regression that caused series name in book details view not not be blue to indicate it is clickable

Improved news sources

• Various Polish news sources
• Il Sole 24 Ore