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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, @height = [w_container, 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, @height = [h_container * object_ratio, 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
13 entries across 13 versions & 1 rubygems