Module: AmpleAssets::ViewHelper

Defined in:
lib/ample_assets/view_helper.rb

Instance Method Summary collapse

Instance Method Details

#assets_toolbar(tabs = nil) ⇒ Object 



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# File 'lib/ample_assets/view_helper.rb', line 4

def assets_toolbar(tabs = nil)
  tabs = AmpleAssets.tabs if tabs.nil?
  script = "var ample_assets = {}; ample_assets.load = true; "
  script += "ample_assets.mount_at = '#{AmpleAssets.mount_at}'; "
  script += "ample_assets.pages = #{tabs.to_json}"
  content_tag :script, script.html_safe, :type => "text/javascript"
end

#image_asset(object, args = {}) ⇒ Object

Returns image tag for an object’s attachment, with optional link element wrapped around it.

@param Object                   - Required 
@param String :alt              - Defaults to object.title
@param String :title
@param String :class
@param String :style
@param String :dimensions       - Dragonfly-esque dimensions... @see http://markevans.github.com/dragonfly/file.Processing.html
@param String :link             - Destination for link_to tag 
@param Symbol :encode           - :gif, :jpg, :png, etc. Defaults to :png
@param Object :object           - Dragonfly object, defaults to object.file
@param Boolean :video           - Link to an iframe lightbox?
@param String :video_dimensions - (width)x(height), defaults to 500x350



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# File 'lib/ample_assets/view_helper.rb', line 26

def image_asset(object, args={})

  # Gracefully handle nil
  return if object.try(:file).nil? && args[:object].nil?

  # Define default opts and merge with parameter args
  opts = {
    :alt => '',
    :video_dimensions => '500x350',
    :encode => :png
  }.merge(args)

  # Override alt text with object title if it exists
  opts[:alt] = escape_javascript(object.title) if object.respond_to?('title')
  
  # See if optional file object actually contains a dfly instance
  if opts[:object]
    attachment = opts[:object].attachment
    attachment_gravity = opts[:object].attachment_gravity
  else 
    attachment = object.file.attachment
    attachment_gravity = object.file.attachment_gravity
  end

  # If this is a crop, try to add gravity
  if opts.try(:[], :dimensions) && opts[:dimensions].include?('#')
    # Strip out image geometry
    opts[:size] = /[0-9]{1,}x[0-9]{1,}/.match(opts[:dimensions]).try(:[], 0)
    width, height = opts[:size].split('x')
    image = attachment.process(:resize_and_crop, :width => width, :height => height, :gravity => attachment_gravity).encode(opts[:encode])
  else
    image = opts.try(:[], :dimensions) ? attachment.process(:thumb, opts[:dimensions]).encode(opts[:encode]) : attachment.encode(opts[:encode])
  end

  # Determine which opts ultimately get passed to image_tag
  valid_opts = [:alt, :class, :style, :title]
  valid_opts.push(:size) unless args[:size] == false

  # Create image tag
  img_tag = image_tag(image.url, opts.slice(*valid_opts))

  # If this is a video link
  if opts[:video]
    link_to img_tag, opts[:link], :rel => 'facebox', :rev => "iframe|#{opts[:video_dimensions]}"
  else
    link_to_if opts[:link], img_tag, opts[:link]
  end

end