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# coding: utf-8
# frozen_string_literal: true
class PDF::Reader
# Small util class for detecting the orientation of a single PDF page. Accounts
# for any page rotation that is in place.
#
# OrientationDetector.new(:MediaBox => [0,0,612,792]).orientation
# => "portrait"
#
class OrientationDetector
def initialize(attributes)
@attributes = attributes
end
def orientation
@orientation ||= detect_orientation
end
private
def detect_orientation
llx,lly,urx,ury = @attributes[:MediaBox]
rotation = @attributes[:Rotate].to_i
width = (urx.to_i - llx.to_i).abs
height = (ury.to_i - lly.to_i).abs
if width > height
(rotation % 180).zero? ? 'landscape' : 'portrait'
else
(rotation % 180).zero? ? 'portrait' : 'landscape'
end
end
end
end
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