Class: RubyXL::ContentTypes

Inherits:
OOXMLTopLevelObject show all
Defined in:
lib/rubyXL/objects/content_types.rb

Constant Summary collapse

SAVE_ORDER =

Must be saved last, so it has time to accumulate overrides from all others.

999

Constants inherited from OOXMLTopLevelObject

OOXMLTopLevelObject::ROOT

Instance Attribute Summary

Attributes inherited from OOXMLTopLevelObject

#root

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from OOXMLTopLevelObject

#add_to_zip, #file_index, parse_file, set_namespaces

Methods included from OOXMLObjectInstanceMethods

#dup, included, #index_in_collection, #initialize, #write_xml

Class Method Details

.xlsx_path ⇒ Object 



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# File 'lib/rubyXL/objects/content_types.rb', line 26

def self.xlsx_path
  ROOT.join('[Content_Types].xml')
end

Instance Method Details

#before_write_xml ⇒ Object 



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# File 'lib/rubyXL/objects/content_types.rb', line 34

def before_write_xml
  content_types_by_ext = {}

  # Collect all extensions and corresponding content types
  root.rels_hash.each_pair { |klass, objects|
    objects.each { |obj|
      next unless klass.const_defined?(:CONTENT_TYPE)
      ext = obj.xlsx_path.extname[1..-1]
      next if ext.nil?
      content_types_by_ext[ext] ||= []
      content_types_by_ext[ext] << klass::CONTENT_TYPE 
    }
  }

  self.defaults = [ RubyXL::ContentTypeDefault.new(:extension => 'xml', :content_type => 'application/xml') ]

  # Determine which content types are used most often, and add them to the list of defaults
  content_types_by_ext.each_pair { |ext, content_types_arr|
    next if ext.nil? || defaults.any? { |d| d.extension == ext } 

    counter = {}  # Count the number of occurrences of a given +content_type+.
    content_types_arr.each { |ct| counter[ct] = (counter[ct] || 0) + 1 }
    most_used_content_type = counter.to_a.max_by{ |pair| pair.last }.first

    defaults << RubyXL::ContentTypeDefault.new(:extension => ext,
                                               :content_type => most_used_content_type)
  }

  self.overrides = []

  # Add overrides for the files with known extensions but different content types.
  root.rels_hash.each_pair { |klass, objects|
    objects.each { |obj|
      next unless defined?(klass::CONTENT_TYPE)
      ext = obj.xlsx_path.extname[1..-1]
      next if ext.nil?
      next if defaults.any? { |d| (d.content_type == klass::CONTENT_TYPE) && (d.extension == ext) }
      overrides << RubyXL::ContentTypeOverride.new(:part_name => obj.xlsx_path,
                                                   :content_type => klass::CONTENT_TYPE)
    }
  }

  true
end

#xlsx_path ⇒ Object 



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# File 'lib/rubyXL/objects/content_types.rb', line 30

def xlsx_path
  self.class.xlsx_path
end