Allow access to other XML docs in docx file like the header and footer

lib/docx/document.rb

@@ -18,15 +18,22 @@ module Docx
   #     puts d.text
   #   end
   class Document
-    attr_reader :xml, :doc, :zip, :styles
+
+    DOCUMENT_PATHS = {
+      doc: "word/document.xml",
+      styles: "word/styles.xml",
+      header: "word/header1.xml",
+      footer: "word/footer1.xml",
+      numbering: "word/numbering.xml"
+    }
+
+    attr_reader :xml, :doc, :zip, :styles, :header, :footer, :numbering
 
     def initialize(path, &block)
       @replace = {}
       @zip = Zip::File.open(path)
-      @document_xml = @zip.read('word/document.xml')
-      @doc = Nokogiri::XML(@document_xml)
-      @styles_xml = @zip.read('word/styles.xml')
-      @styles = Nokogiri::XML(@styles_xml)
+      extract_documents
+
       if block_given?
         yield self
         @zip.close
@@ -123,6 +130,15 @@ def replace_entry(entry_path, file_contents)
 
     private
 
+    def extract_documents
+      DOCUMENT_PATHS.each do |attr_name, path|
+        if @zip.find_entry(path)
+          xml_doc = @zip.read(path)
+          self.instance_variable_set(:"@#{attr_name}", Nokogiri::XML(xml_doc))
+        end
+      end
+    end
+
     #--
     # TODO: Flesh this out to be compatible with other files
     # TODO: Method to set flag on files that have been edited, probably by inserting something at the

spec/docx/document_spec.rb

@@ -279,6 +279,22 @@
     end
   end
 
+  describe 'multiple documents' do
+    before do
+      @doc = Docx::Document.open(@fixtures_path + '/multi_doc.docx')
+    end
+
+    it 'should extract all inner documents' do
+      expect(@doc.doc).to_not be_nil
+      expect(@doc.styles).to_not be_nil
+      expect(@doc.header).to_not be_nil
+      expect(@doc.header.text).to eq "Hello from the header."
+      expect(@doc.footer).to_not be_nil
+      expect(@doc.footer.text).to eq "Hello from the footer."
+      expect(@doc.numbering).to_not be_nil
+    end
+  end
+
   describe 'saving' do
     before do
       @doc = Docx::Document.open(@fixtures_path + '/saving.docx')