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# encoding: UTF-8
module Axlsx
# The color class represents a color used for borders, fills an fonts
class Color
# Determines if the color is system color dependant
# @return [Boolean]
attr_reader :auto
# The color as defined in rgb terms.
# @note
# rgb colors need to conform to ST_UnsignedIntHex. That basically means put 'FF' before you color
# When assigning the rgb value the behavior is much like CSS selectors and can use shorthand versions as follows:
# If you provide a two character value it will be repeated for each r, g, b assignment
# If you provide data that is not 2 characters in length, and is less than 8 characters it will be padded with "F"
# @example
# Color.new :rgb => "FF000000"
# => #<Axlsx::Color:0x102106b68 @rgb="FF000000">
# Color.new :rgb => "0A"
# => #<Axlsx::Color:0x102106b68 @rgb="FF0A0A0A">
# Color.new :rgb => "00BB"
# => #<Axlsx::Color:0x102106b68 @rgb="FFFF00BB">
# @return [String]
attr_reader :rgb
# no support for theme just yet
# @return [Integer]
#attr_reader :theme
# The tint value.
# @note valid values are between -1.0 and 1.0
# @return [Float]
attr_reader :tint
# Creates a new Color object
# @option options [Boolean] auto
# @option options [String] rgb
# @option options [Float] tint
def initialize(options={})
@rgb = "FF000000"
options.each do |o|
self.send("#{o[0]}=", o[1]) if self.respond_to? o[0]
end
end
# @see auto
def auto=(v) Axlsx::validate_boolean v; @auto = v end
# @see color
def rgb=(v)
Axlsx::validate_string(v)
v.upcase!
v = v * 3 if v.size == 2
v = v.rjust(8, 'FF')
raise ArgumentError, "Invalid color rgb value: #{v}." unless v.match(/[0-9A-F]{8}/)
@rgb = v
end
# @see tint
def tint=(v) Axlsx::validate_float v; @tint = v end
# This version does not support themes
# def theme=(v) Axlsx::validate_unsigned_integer v; @theme = v end
# Indexed colors are for backward compatability which I am choosing not to support
# def indexed=(v) Axlsx::validate_unsigned_integer v; @indexed = v end
# Serializes the object
# @param [String] str
# @return [String]
def to_xml_string(str = '')
str << "<color "
self.instance_values.each do |key, value|
str << key.to_s << '="' << value.to_s << '" '
end
str << "/>"
end
end
end
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