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Contents
require 'iiif_manifest'
module Hyrax
# This gets mixed into FileSetPresenter in order to create
# a canvas on a IIIF manifest
module DisplaysImage
extend ActiveSupport::Concern
# Creates a display image only where FileSet is an image.
#
# @return [IIIFManifest::DisplayImage] the display image required by the manifest builder.
def display_image
return nil unless ::FileSet.exists?(id) && solr_document.image? && current_ability.can?(:read, id)
# @todo this is slow, find a better way (perhaps index iiif url):
original_file = ::FileSet.find(id).original_file
url = Hyrax.config.iiif_image_url_builder.call(
original_file.id,
request.base_url,
Hyrax.config.iiif_image_size_default
)
# @see https://github.com/samvera-labs/iiif_manifest
IIIFManifest::DisplayImage.new(url,
width: 640,
height: 480,
iiif_endpoint: iiif_endpoint(original_file.id))
end
private
def iiif_endpoint(file_id)
return unless Hyrax.config.iiif_image_server?
IIIFManifest::IIIFEndpoint.new(
Hyrax.config.iiif_info_url_builder.call(file_id, request.base_url),
profile: Hyrax.config.iiif_image_compliance_level_uri
)
end
end
end
Version data entries
25 entries across 25 versions & 1 rubygems