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# frozen_string_literal: true
module Axlsx
# The Axes class creates and manages axis information and
# serialization for charts.
class Axes
# @param [Hash] options options used to generate axis each key
# should be an axis name like :val_axis and its value should be the
# class of the axis type to construct. The :cat_axis, if there is one,
# must come first (we assume a Ruby 1.9+ Hash or an OrderedHash).
def initialize(options = {})
raise(ArgumentError, "CatAxis must come first") if options.key?(:cat_axis) && options.keys.first != :cat_axis
options.each do |name, axis_class|
add_axis(name, axis_class)
end
end
# [] provides assiciative access to a specic axis store in an axes
# instance.
# @return [Axis]
def [](name)
axes.assoc(name)[1]
end
# Serializes the object
# @param [String] str
# @param [Hash] options
# @option options ids
# If the ids option is specified only the axis identifier is
# serialized. Otherwise, each axis is serialized in full.
def to_xml_string(str = +'', options = {})
if options[:ids]
# CatAxis must come first in the XML (for Microsoft Excel at least)
sorted = axes.sort_by { |_name, axis| axis.is_a?(CatAxis) ? 0 : 1 }
sorted.each { |axis| str << '<c:axId val="' << axis[1].id.to_s << '"/>' }
else
axes.each { |axis| axis[1].to_xml_string(str) }
end
end
# Adds an axis to the collection
# @param [Symbol] name The name of the axis
# @param [Axis] axis_class The axis class to generate
def add_axis(name, axis_class)
axis = axis_class.new
set_cross_axis(axis)
axes << [name, axis]
end
private
def axes
@axes ||= []
end
def set_cross_axis(axis)
axes.first[1].cross_axis = axis if axes.size == 1
axis.cross_axis = axes.first[1] unless axes.empty?
end
end
end
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