DjVu-Tools

What is DjVu-Tools?

DjVu-Tools is a Ruby library for manipulating DjVu files. The interface is built on the DjVuLibre djvused command line tool provided by DjVuLibre. Current tools include:

  • Easy page title management for page number generation. The only way to achieve consistent page numbering for most books is to set the page title for each page. The DjVuNumberer class provides a way to title individual pages and number ranges of pages in various styles.

Installation

Add this line to your application's Gemfile:

gem 'djvu-tools'

And then execute:

$ bundle

Or install it yourself as:

$ gem install djvu-tools

Using DjVu-Tools

Numberer

Fist pick a file to work on:

djvu = DjVuNumberer.new 'book.djvu'

Then create sections to title or number:

  • A single page

    djvu.add_section( { title: 'Cover', range: (1..1) } )
    
  • A range of pages with uppercase Roman numerals starting with I:

    djvu.add_section( { start: 1, range: (2..10), type: :upper_roman } )
    
  • A range of pages with lowercase Roman numerals starting with x:

    djvu.add_section( { start: 10, range: (11..20), type: :lower_roman } )
    
  • A range of pages with Arabic numerals starting with 1:

    djvu.add_section( { start: 1, range: (21..500), type: :arabic } )
    
  • A range of pages with Arabic numerals starting with 1 and spaced 2 apart:

    djvu.add_section( { start: 1, range: (21..500), type: :arabic, delta: 2 } )
    

Finally, you must run djvused and write to the file with

djvu.run

If you get an error such as

File with TITLE 'foo' already exists in the DJVM directory.

then a page with the same title already exists (this may be case intensive). You may wish to first relabel all of the pages with a range of numbers you will not use before you attempt again.

Development

Source Repository

DjVu-Tools is currently hosted at github. The github web page is github.com/razor-x/DjVu-Tools. To clone the project run

$ git clone git://github.com/razor-x/DjVu-Tools.git

After cloning, you should run yard to generate documentation for the source.

License

DjVu-Tools is released under the MIT license:

Warranty

This software is provided “as is” and without any express or implied warranties, including, without limitation, the implied warranties of merchantibility and fitness for a particular purpose.