Sha256: 68c9d672e323baac0f68ccbb6dfb8f5dad3428d089dd3b45a55701578b1785fa
Contents?: true
Size: 1.53 KB
Versions: 5
Compression:
Stored size: 1.53 KB
Contents
# frozen_string_literal: true
module OoxmlParser
# Helper methods for color
module ColorHelper
# @return [String] value for auto string
AUTO_STRING_VALUE = 'auto'
# Parse string in hex
# @param [String] hex_string with or without alpha-channel
def parse_hex_string(hex_string)
return self if hex_string == AUTO_STRING_VALUE
case hex_string.length
when 3
@red, @green, @blue = hex_string.chars.map(&:hex)
when 6
@red, @green, @blue = hex_string.unpack('A2A2A2').map(&:hex)
when 8
@alpha_channel, @red, @green, @blue = hex_string.unpack('A2A2A2A2').map(&:hex)
end
self
end
# Convert color to HSLColor
# @return [HSLColor]
def to_hsl
hls_color = HSLColor.new
min = [red, green, blue].min.to_f
max = [red, green, blue].max.to_f
delta = (max - min).to_f
hls_color.l = (min + max) / 255.0 / 2.0
hls_color.alpha_channel = alpha_channel.to_f / 255.0
unless max == min
hls_color.s = delta / (255.0 - (255.0 - max - min).abs)
hls_color.h = if max == red && green >= blue
60.0 * (green - blue) / delta
elsif max == red && green < blue
(60.0 * (green - blue) / delta) + 360.0
elsif max == green
(60.0 * (blue - red) / delta) + 120.0
else
(60.0 * (red - green) / delta) + 240.0
end
end
hls_color
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems