Merge pull request ruby-docx#138 from miko53/styles-dev

add basic style definition

Author: satoryu

lib/docx/containers/container.rb

@@ -7,12 +7,12 @@ module Container
         # Relation methods
         # TODO: Create a properties object, include Element
         def properties
-          @node.at_xpath("./#{@properties_tag}")
+          @node.at_xpath("./w:#{@properties_tag}")
         end
 
         # Erase text within an element
         def blank!
-          @node.xpath(".//w:t").each {|t| t.content = '' }
+          @node.xpath('.//w:t').each { |t| t.content = '' }
         end
 
         def remove!

lib/docx/containers/paragraph.rb

@@ -15,11 +15,12 @@ def self.tag
 
         # Child elements: pPr, r, fldSimple, hlink, subDoc
         # http://msdn.microsoft.com/en-us/library/office/ee364458(v=office.11).aspx
-        def initialize(node, document_properties = {})
+        def initialize(node, document_properties = {}, doc = nil)
           @node = node
           @properties_tag = 'pPr'
           @document_properties = document_properties
           @font_size = @document_properties[:font_size]
+          @document = doc
         end
 
         # Set text of paragraph
@@ -79,17 +80,30 @@ def font_size
           size_tag = @node.xpath('w:pPr//w:sz').first
           size_tag ? size_tag.attributes['val'].value.to_i / 2 : @font_size
         end
-        
+
+        def style
+          return nil unless @document
+
+          if style_property.nil?
+            @document.default_paragraph_style
+          else
+            @document.style_name(style_property.attributes['val'].value)
+          end
+        end
+
         alias_method :text, :to_s
 
         private
 
+        def style_property
+          properties&.at_xpath('w:pStyle')
+        end
+
         # Returns the alignment if any, or nil if left
         def alignment
           alignment_tag = @node.xpath('.//w:jc').first
           alignment_tag ? alignment_tag.attributes['val'].value : nil
         end
-
       end
     end
   end

lib/docx/document.rb

@@ -168,6 +168,18 @@ def replace_entry(entry_path, file_contents)
       @replace[entry_path] = file_contents
     end
 
+    def default_paragraph_style
+      s = @styles.at_xpath("w:styles/w:style[@w:type='paragraph' and @w:default='1']")
+      s = s.at_xpath('w:name')
+      s.attributes['val'].value
+    end
+
+    def style_name(style_id)
+      s = @styles.at_xpath("w:styles/w:style[@w:styleId='#{style_id}']")
+      s = s.at_xpath('w:name')
+      s.attributes['val'].value
+    end
+
     private
 
     def load_styles
@@ -198,7 +210,7 @@ def update
 
     # generate Elements::Containers::Paragraph from paragraph XML node
     def parse_paragraph_from(p_node)
-      Elements::Containers::Paragraph.new(p_node, document_properties)
+      Elements::Containers::Paragraph.new(p_node, document_properties, self)
     end
 
     # generate Elements::Bookmark from bookmark XML node

spec/docx/document_spec.rb

@@ -504,4 +504,22 @@
       expect(doc.to_s).to be_a(String)
     end
   end
+
+  describe 'reading style' do
+    before do
+      @doc = Docx::Document.open(@fixtures_path + '/test_with_style.docx')
+    end
+
+    it 'read default style when not' do
+      nb = @doc.paragraphs.size
+      expect(nb).to eq 6
+      expect(@doc.paragraphs[0].style).to eq 'Normal'
+      expect(@doc.paragraphs[1].style).to eq 'STYLE1'
+      expect(@doc.paragraphs[2].style).to eq 'heading 1'
+      expect(@doc.paragraphs[3].style).to eq 'Normal'
+      expect(@doc.paragraphs[4].style).to eq 'Normal'
+      expect(@doc.paragraphs[5].style).to eq 'STYLE1'
+    end
+  end
+
 end