djvu layer

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This layer adds support for reading djvu files with spacemacs.

Because of some difficulties, the layer does not lazy load the djvu.el and djvu3.el packages.

This layer provides a full featured djvu editor by implementing the djvu.el package along with the djvu3 extension (a newer alternative to djvu2.el).

flexible annotation editing and rendering, covering most (but not all) of djvused annotation definitions
fast navigation with imenu
fast search with djvu-occur
remember last view with djvu-restore
dark mode

The djvu package requires the command djvused (from djvulibre) to be available in exec-path.

Additionally, for dark-mode the command pnminvert (from netpbm) is required.

After installing the dependencies, add this to your ~/.spacemacs.

(setq-default dotspacemacs-configuration-layers '(djvu))

Key binding	Description
`i`	djvu-image-toggle
`j`	scroll up
`k`	scroll down
`J`	next page
`K`	previous page
`g`	goto page
`d`	djvu-toggle-invert (dark-mode)
`c`	djvu-toggle-semi-continuous-scrolling (works only when image larger than window)
`+/-`	zoom-in/out
`, s`	djvu-occur
`/`	djvu fast search
`n`	djvu search continue
`SPC j i`	imenu navigation
`o`	outline

Key binding	Description
`SPC m h`	keyboard highlight
`mouse-1-drag`	highlight
`S-mouse-1-drag`	text annotation (comment)
`C-mouse-1-drag`	text pushpin (rendering pushpin not yet implemented)
`mouse-2-drag`	line
`S-mouse-2-drag`	horizontal line
`C-mouse-2-drag`	vertical line
`C-S-mouse-2-drag`	arrow

Key binding	Description
`s`	save-image

Key binding	Description
`C-j`	next entry and follow
`C-k`	prevoius entry and follow