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Contents
module Fleximage
# Renders a .flexi template
class LegacyView #:nodoc:
class TemplateDidNotReturnImage < RuntimeError #:nodoc:
end
def initialize(view)
@view = view
end
def render(template, local_assigns = {})
# process the view
result = @view.instance_eval do
# Shorthand color creation
def color(*args)
if args.size == 1 && args.first.is_a?(String)
args.first
else
Magick::Pixel.new(*args)
end
end
# inject assigns into instance variables
assigns.each do |key, value|
instance_variable_set "@#{key}", value
end
# inject local assigns into reader methods
local_assigns.each do |key, value|
class << self; self; end.send(:define_method, key) { value }
end
#execute the template
eval(template)
end
# Raise an error if object returned from template is not an image record
unless result.class.include?(Fleximage::Model::InstanceMethods)
raise TemplateDidNotReturnImage, ".flexi template was expected to return a model instance that acts_as_fleximage, but got an instance of <#{result.class}> instead."
end
# Figure out the proper format
requested_format = (@view.params[:format] || :jpg).to_sym
raise 'Image must be requested with an image type format. jpg, gif and png only are supported.' unless [:jpg, :gif, :png].include?(requested_format)
# Set proper content type
@view.controller.headers["Content-Type"] = Mime::Type.lookup_by_extension(requested_format.to_s).to_s
# get rendered result
rendered_image = result.output_image(:format => requested_format)
# Return image data
return rendered_image
ensure
# ensure garbage collection happens after every flex image render
rendered_image.dispose!
GC.start
end
end
end
Version data entries
14 entries across 14 versions & 4 rubygems