Improve overall user experience

• Make selection-style configurable when selecting text, via
  pdf-view-selection-style @hrdl-github #73
  • This feature enabled us to change the default selection-style used
    in pdf-tools from GLYPH to WORD.
  • The change makes highlighting / selecting text much snappier. If
    you want to go back to the old behaviour of selecting by glyph
    instead of word, or if you want to select a whole line instead,
    customize pdf-view-selection-style
• Track rotation of pages and add a command to make rotation of pages
  easy @vizs #165
  • The new command is bound to R in pdf-view-mode-map.
• Add support for maintaining hue in pdf-view-midnight-minor-mode
  using the OKLab color space @smithzvk #69 #197
  • This inversion method is now enabled by default and can be
    controlled by the pdf-view-midnight-invert variable. Check out the
    images in the PR for how beautiful the colors look in midnight mode
    now.
  • Also thanks to @Atreyagaurav for pushing fixes which improved this
    feature.

Functionality fixes and improvements

• Fix: Saving a PDF when buffer-file-name is missing will now prompt
  for a filename (eg: in EWW) @akater #178
• Fix: Ensure pixel-scroll-precision-mode is deactivated correctly
  @mssdvd #206

Installation and Platform Compatibility improvements

Please note: as of this release, users are not expected to manually set
anything on their machines during installation. (for example:
$PKG_CONFIG_PATH). The installation should just work. If it does
not, please open a ticket so that we can track it.

• Add cairo-devel to Void Linux package list @crzjp #203

Breaking changes:

• Raise the minimum supported version of Emacs to 26.3 #26
  Drop support for Emacs 24 and 25. This allows for some code
  cleanup. This is a major breaking change.

• Change the default value of pdf-view-use-scaling #133
  pdf-view-use-scaling is now true by default, leading to rendering
  of crisp images on high-resolution screens. This should not cause
  problems on low-resolution screen (other than taking up more cache
  space / increasing rendering time), but if it does, please (setq pdf-view-use-scaling nil) in your configuration.

Other than the breaking changes, this release contains a lot of
changes related to user experience improvements and installation /
compatibility improvements.

It also sets up the stage for adding new features and closing
long-standing PRs into pdf-tools. I'm hoping to follow this release
up with a 1.1.0 release before the year is out, which will contain
some of these pending PR changes.

Thanks, and enjoy!

This is the last release to support Emacs 24.x. Release 1.0.0 will update the minimum supported Emacs version.

NEWS:

• Make changes required by newer versions of Emacs: A number of changes are made to support new elisp / package changes. There is no impact of this on existing users.
  • Emacs 27, Emacs 28 and Emacs 29 are supported now.
  • Synctex 1.21 is supported now.
• Improve overall install experience
  • Running M-x pdf-tools-install should just work now.
• Add support for high-resolution displays (Retina display on Mac)
  • Setting pdf-view-use-scaling to a non-nil value now renders crisp images on high-resolution displays.
• Change the keybindings for traversing history
  • This is a minor but breaking change. l (backward) and r (forward) are the conventional bindings for history navigation in Emacs, but pdf-tools uses B and N. The previous keybindings are kept as-is for people who were used to it, while introducing l and r keybindings as well.
  • This is a breaking change because r was previously bound to revert-buffer. However, g is also bound to revert-buffer and is the conventional binding for revert so this should be okay.