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Contents
module Prawn::SVG::Calculators
class AspectRatio
attr_reader :align, :defer
attr_reader :width, :height, :x, :y
def initialize(value, container_dimensions, object_dimensions)
values = (value || 'xMidYMid meet').split
@x = @y = 0
if values.first == 'defer'
@defer = true
values.shift
end
@align, @meet_or_slice = values
w_container, h_container = container_dimensions
w_object, h_object = object_dimensions
container_ratio = w_container / h_container.to_f
object_ratio = w_object / h_object.to_f
if @align == 'none'
@width, @height = container_dimensions
else
matches = @align.to_s.strip.match(/\Ax(Min|Mid|Max)Y(Min|Mid|Max)\z/i) || [nil, 'Mid', 'Mid']
if (container_ratio > object_ratio) == slice?
@width = w_container
@height = w_container / object_ratio
@y = case matches[2].downcase
when 'min' then 0
when 'mid' then (h_container - (w_container / object_ratio)) / 2
when 'max' then h_container - (w_container / object_ratio)
end
else
@width = h_container * object_ratio
@height = h_container
@x = case matches[1].downcase
when 'min' then 0
when 'mid' then (w_container - (h_container * object_ratio)) / 2
when 'max' then w_container - (h_container * object_ratio)
end
end
end
end
def slice?
@meet_or_slice == 'slice'
end
def meet?
@meet_or_slice != 'slice'
end
def inspect
"[AspectRatio: #{@width},#{@height} offset #{@x},#{@y}]"
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems