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# frozen_string_literal: true
module Axlsx
# This is a utility class for serialing the drawing node in a
# worksheet. Drawing objects have their own serialization that exports
# a drawing document. This is only for the single node in the
# worksheet
class WorksheetDrawing
# Creates a new WorksheetDrawing
# @param [Worksheet] worksheet
def initialize(worksheet)
raise ArgumentError, 'you must provide a worksheet' unless worksheet.is_a?(Worksheet)
@worksheet = worksheet
@drawing = nil
end
attr_reader :worksheet
attr_reader :drawing
# adds a chart to the drawing object
# @param [Class] chart_type The type of chart to add
# @param [Hash] options Options to pass on to the drawing and chart
# @see Worksheet#add_chart
def add_chart(chart_type, options)
@drawing ||= Drawing.new worksheet
drawing.add_chart(chart_type, options)
end
# adds an image to the drawing object
# @param [Hash] options Options to pass on to the drawing and image
# @see Worksheet#add_image
def add_image(options)
@drawing ||= Drawing.new(worksheet)
drawing.add_image(options)
end
# helper method to tell us if the drawing has something in it or not
# @return [Boolean]
def has_drawing? # rubocop:disable Naming/PredicateName
@drawing.is_a? Drawing
end
# The relationship instance for this drawing.
# @return [Relationship]
def relationship
return unless has_drawing?
Relationship.new(self, DRAWING_R, "../#{drawing.pn}")
end
# Serialize the drawing for the worksheet
# @param [String] str
def to_xml_string(str = +'')
return unless has_drawing?
str << "<drawing r:id='#{relationship.Id}'/>"
end
end
end
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