Module: Refinery::Helpers::ImageHelper

Defined in:
lib/refinery/helpers/image_helper.rb

Instance Method Summary collapse

Instance Method Details

#content_fu(content, thumbnail) ⇒ Object

replace all system images with a thumbnail version of them (handy for all images inside a page part) for example, <%= content_fu(@page, ‘96x96#c’) %> converts all /system/images to a 96x96 cropped thumbnail



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# File 'lib/refinery/helpers/image_helper.rb', line 7

def content_fu(content, thumbnail)
  content.gsub(%r{<img.+?src=['"](/system/images/.+?)/.+?/>}) do |image_match|
     begin
       uid = Dragonfly::Job.from_path(
                "#{image_match.match(%r{(/system/images/.+?)/})[1]}", Dragonfly[:images]
             ).uid

       image_fu Image.where(:image_uid => uid).first, thumbnail
     rescue
       # FAIL, don't care why but return what we found initially.
       image_match
     end
   end
end

#image_fu(image, geometry = nil, options = {}) ⇒ Object

image_fu is a helper for inserting an image that has been uploaded into a template. Say for example that we had a @model.image (@model having a belongs_to :image relationship) and we wanted to display a thumbnail cropped to 200x200 then we can use image_fu like this: <%= image_fu @model.image, ‘200x200’ %> or with no thumbnail: <%= image_fu @model.image %>



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# File 'lib/refinery/helpers/image_helper.rb', line 26

def image_fu(image, geometry = nil, options={})
  if image.present?
    # call rails' image tag function with default alt tag.
    # if any other options were supplied these are merged in and can replace the defaults.
    # if the geomtry is nil, then we know the image height and width already.
    # detect nil geometry or cropping presence which is where we can guess the dimensions
    unless geometry.nil? or !(split_geometry = geometry.to_s.split('#')).many? or !(split_geometry = split_geometry.first.split('x')).many?
      image_width, image_height = split_geometry
    else
      image_with = nil
      image_height = nil
    end

    image_tag(image.thumbnail(geometry).url, {
      :alt => image.respond_to?(:title) ? image.title : image.image_name,
      :width => image_width,
      :height => image_height
    }.merge(options))
  end
end