Document handles a docx file without styles.xml

Author: satoryu

lib/docx/document.rb

@@ -25,8 +25,7 @@ def initialize(path, &block)
       @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)
+      load_styles
       if block_given?
         yield self
         @zip.close
@@ -70,6 +69,8 @@ def tables
     # Some documents have this set, others don't.
     # Values are returned as half-points, so to get points, that's why it's divided by 2.
     def font_size
+      return nil unless @styles
+
       size_tag = @styles.xpath('//w:docDefaults//w:rPrDefault//w:rPr//w:sz').first
       size_tag ? size_tag.attributes['val'].value.to_i / 2 : nil
     end
@@ -123,6 +124,14 @@ def replace_entry(entry_path, file_contents)
 
     private
 
+    def load_styles
+      @styles_xml = @zip.read('word/styles.xml')
+      @styles = Nokogiri::XML(@styles_xml)
+    rescue Errno::ENOENT => e
+      warn e.message
+      nil
+    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

@@ -39,6 +39,18 @@
         end
       end
     end
+
+    describe '#font_size' do
+      context 'When a docx files has no styles.xml' do
+        before do
+          @doc = Docx::Document.new(@fixtures_path + '/no_styles.docx')
+        end
+
+        it 'should raise an error' do
+          expect(@doc.font_size).to be_nil
+        end
+      end
+    end
   end
 
   describe 'read tables' do