queer.af's fork of mastodon
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# frozen_string_literal: true
module Paperclip
class LazyThumbnail < Paperclip::Thumbnail
def make
return File.open(@file.path) unless needs_convert?
if options[:geometry]
min_side = [@current_geometry.width, @current_geometry.height].min.to_i
options[:geometry] = "#{min_side}x#{min_side}#" if @target_geometry.square? && min_side < @target_geometry.width
elsif options[:pixels]
width = Math.sqrt(options[:pixels] * (@current_geometry.width.to_f / @current_geometry.height)).round.to_i
height = Math.sqrt(options[:pixels] * (@current_geometry.height.to_f / @current_geometry.width)).round.to_i
options[:geometry] = "#{width}x#{height}>"
end
Paperclip::Thumbnail.make(file, options, attachment)
end
private
def needs_convert?
needs_different_geometry? || needs_different_format? || needs_metadata_stripping?
end
def needs_different_geometry?
(options[:geometry] && @current_geometry.width != @target_geometry.width && @current_geometry.height != @target_geometry.height) ||
(options[:pixels] && @current_geometry.width * @current_geometry.height > options[:pixels])
end
def needs_different_format?
@format.present? && @current_format != @format
end
def needs_metadata_stripping?
@attachment.instance.respond_to?(:local?) && @attachment.instance.local?
end
end
end