Class: Jekyll::ResponsiveImage::ResizeHandler

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/jekyll-responsive-image/resize_handler.rb

Instance Method Summary collapse

Methods included from Utils

#image_hash, #keep_resized_image!, #relative_dirname, #symbolize_keys

Instance Method Details

#ensure_output_dir_exists!(path) ⇒ Object 



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# File 'lib/jekyll-responsive-image/resize_handler.rb', line 72

def ensure_output_dir_exists!(path)
  dir = File.dirname(path)

  unless Dir.exist?(dir)
    Jekyll.logger.info "Creating output directory #{dir}"
    FileUtils.mkdir_p(dir)
  end
end

#format_output_path(format, config, image_path, width, height) ⇒ Object 



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# File 'lib/jekyll-responsive-image/resize_handler.rb', line 62

def format_output_path(format, config, image_path, width, height)
  params = symbolize_keys(image_hash(config, image_path, width, height))

  Pathname.new(format % params).cleanpath.to_s
end

#needs_resizing?(img, width) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jekyll-responsive-image/resize_handler.rb', line 68

def needs_resizing?(img, width)
  img.columns > width
end

#resize_image(img, config) ⇒ Object 



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# File 'lib/jekyll-responsive-image/resize_handler.rb', line 6

def resize_image(img, config)
  img.auto_orient! if config['auto_rotate']

  resized = []

  config['sizes'].each do |size|
    width = size['width']
    ratio = width.to_f / img.columns.to_f
    height = (img.rows.to_f * ratio).round

    next unless needs_resizing?(img, width)

    image_path = img.filename.force_encoding(Encoding::UTF_8)
    filepath = format_output_path(config['output_path_format'], config, image_path, width, height)
    resized.push(image_hash(config, filepath, width, height))

    site_source_filepath = File.expand_path(filepath, config[:site_source])
    site_dest_filepath = File.expand_path(filepath, config[:site_dest])

    if config['save_to_source']
      target_filepath = site_source_filepath
    else
      target_filepath = site_dest_filepath
    end

    # Don't resize images more than once
    next if File.exist?(target_filepath)

    ensure_output_dir_exists!(target_filepath)
    ensure_output_dir_exists!(site_dest_filepath)

    Jekyll.logger.info "Generating #{target_filepath}"

    if config['strip']
      img.strip!
    end
    i = img.scale(ratio)
    i.write(target_filepath) do |f|
      f.interlace = i.interlace
      f.quality = size['quality'] || config['default_quality']
    end

    if config['save_to_source']
      # Ensure the generated file is copied to the _site directory
      Jekyll.logger.info "Copying resized image to #{site_dest_filepath}"
      FileUtils.copy_file(site_source_filepath, site_dest_filepath)
    end

    i.destroy!
  end

  img.destroy!

  resized
end