Class: ImageThumbnails

Inherits:
Dropsite::DirRenderer show all
Defined in:
lib/dropsite/plugins/image_thumbnails/image_thumbnails.rb

Constant Summary

Constants inherited from Dropsite::DirRenderer

Dropsite::DirRenderer::TEMPLATE_EXTENSIONS

Instance Attribute Summary

Attributes inherited from Dropsite::DirRenderer

#assets_dir, #template_path

Instance Method Summary collapse

Methods inherited from Dropsite::DirRenderer

inherited, #render, renderers

Instance Method Details

#built_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dropsite/plugins/image_thumbnails/image_thumbnails.rb', line 24

def built_in?
  true
end

#can_render?(site_dir) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dropsite/plugins/image_thumbnails/image_thumbnails.rb', line 2

def can_render?(site_dir)
  return false if not thumbnail_generator
  !site_dir.files.empty? && site_dir.files.all? {|e| e.file_type == :image}
end

#thumbnail_generator ⇒ Object 



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# File 'lib/dropsite/plugins/image_thumbnails/image_thumbnails.rb', line 28

def thumbnail_generator
  return @thumbnail_generator_cache if instance_variables.include?('@thumbnail_generator_cache')

  begin
    require 'image_science'
    return @thumbnail_generator_cache = :image_science
  rescue LoadError
  end

  begin
    require 'rmagick'
    return @thumbnail_generator_cache = :rmagick
  rescue LoadError
  end

  return @thumbnail_generator_cache = nil
end

#write_page_assets(site_dir) ⇒ Object 



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# File 'lib/dropsite/plugins/image_thumbnails/image_thumbnails.rb', line 7

def write_page_assets(site_dir)
  raise 'No thumbnail generator' if not thumbnail_generator

  assets_dir = site_dir.page_assets_dir
  site_dir.entries.find_all {|e| e.is_a? SiteFile}.each do |e|
    src_image = e.abs_path
    case thumbnail_generator
    when :image_science
      write_thumb_with_image_science(src_image, assets_dir)
    when :rmagick
      write_thumb_with_rmagick(src_image, assets_dir)
    else
      raise "Unrecognized thumbnail generator: #{thumbnail_generator}"
    end
  end
end