engine/app/helpers/admin/assets_helper.rb

module Admin::AssetsHelper

  def vignette_tag(asset)
    if asset.image?
      html, css = image_tag(asset.vignette_url), 'image'
    else
      css = "icon #{asset.content_type}"
      html = asset.content_type.to_s == 'other' ? truncate(asset.extname, :length => 3) : asset.content_type
      html = '?' if html.blank?
    end

    content_tag(:div, content_tag(:div, html, :class => 'inside'), :class => css)
  end

  def image_dimensions_and_size(asset)
    content_tag(:small, "#{asset.width}px x #{asset.height}px | #{number_to_human_size(asset.size)}")
  end

  def allow_plain_text_editing?(asset)
    asset.new_record? || asset.stylesheet_or_javascript?
  end

  def display_plain_text?(asset)
    if asset.new_record?
      asset.performing_plain_text?
    else
      asset.stylesheet_or_javascript?
    end
  end

end