Module: ActionView::Helpers::AssetTagHelper

Defined in:
lib/retina_rails/helpers.rb

Instance Method Summary collapse

Instance Method Details

#retina_image_tag(model, mounted_to, version, options = {}) ⇒ Object

Displays a version of an upload and sets stored width and height attributes

Parameters

model (Model)

model instance

mounted_to (Sym)

attribute to which uploader is mounted

version (Sym)

version of the upload

options (Hash)

optional options hash

Examples

retina_image_tag(@user, :avatar, :small, :default => { :width => 300, :height => 200 }) retina_image_tag(@user, :avatar, :small, :default => [300, 200])



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# File 'lib/retina_rails/helpers.rb', line 20

def retina_image_tag(model, mounted_to, version, options={})
  default = options.delete(:default)

  # Check if we can find the dimensions of the uploaded image.
  # If no image or dimensions available use default.
  if model.retina_dimensions.kind_of?(Hash) && model.retina_dimensions[mounted_to.to_sym]
    dimensions = model.retina_dimensions[mounted_to.to_sym][version.to_sym]
  else
    if default.kind_of?(Array)
      default = { :width => default[0], :height => default[1] }
    end
    dimensions = default || {}
  end

  options = dimensions.merge(options)

  image_tag(model.send(mounted_to).url(version), options)
end