Module: PDFThumbnail::Filters

Includes:
PDFThumbnail
Defined in:
lib/jekyll-pdf-thumbnail.rb

Constant Summary

Constants included from PDFThumbnail

CACHE_DIR, HASH_LENGTH

Instance Method Summary collapse

Methods included from PDFThumbnail

#_dest_filename, #_get_cache_dir, #_must_create?, #generate_thumbnail

Instance Method Details

#pdf_thumbnail(pdf, args = nil) ⇒ Object 



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# File 'lib/jekyll-pdf-thumbnail.rb', line 61

def pdf_thumbnail(pdf, args=nil)
  # Returns the thumbnail path for a given pdf file.
  # Example:
  #   >> pdf_thumbnail "/path/to/sample_1.pdf"
  #   => /assets/pdf_thumbnails/a35383ccca791ba6aa67ab3acde65287.png
  #
  # Or as a liquid filter:
  #  {% assign my_pdf = 'sample_2.pdf' %}
  #  {{ my_pdf | pdf_preview }}
  #
  # Arguments:
  #   pdf: (String)
  #   args: a dict that can contain "resize" and "quality"
  if args == nil
    args = {"resize"=> "50%", "quality": '80%'}
  end
  resize = args.fetch("resize", "50%")
  quality = args.fetch("quality", "80%")
  site = @context.registers[:site]
  full_cache_dir = _get_cache_dir(site)
  full_pdf_path = File.join(site.source, pdf)
  thumbnail = _dest_filename(full_pdf_path, resize, quality)
  rel_thumb_path = File.join(CACHE_DIR, thumbnail)
  full_thumb_path = File.join(_get_cache_dir(site), thumbnail)
  if _must_create?(full_pdf_path, full_thumb_path)
    puts "Creating thumbnail of' #{pdf}' to '#{rel_thumb_path}'"
    generate_thumbnail(full_pdf_path, full_thumb_path, resize, quality)
    # site - The Site.
    # base - The String path to the <source>.
    # dir - The String path between <source> and the file.
    # name - The String filename of the file.
    site.static_files << Jekyll::StaticFile.new(site, site.source, CACHE_DIR, thumbnail)
  end
  rel_thumb_path
end