Implement styles

lib/ezdoc/document.rb

@@ -4,7 +4,7 @@ module Ezdoc
   class Document
     include Builder
 
-    attr_reader :nodes
+    attr_reader :nodes, :styles
 
     def self.create(path, &block)
       doc = new
@@ -22,6 +22,16 @@ module Ezdoc
       @current_row = nil
       @num_id_counter = 0
       @images = {}
+      @styles = {}
+      register_built_in_styles
+    end
+
+    def define_style(name, **properties)
+      @styles[name] = Style.new(name, **properties)
+    end
+
+    def style(name)
+      @styles[name]
     end
 
     def save(path)
@@ -49,8 +59,27 @@ module Ezdoc
     private
 
     def next_image_rid
-      base = lists.any? ? 2 : 1
+      # rId1 = styles.xml (always present)
+      # rId2 = numbering.xml (if lists present)
+      # rId3+ = images
+      base = lists.any? ? 3 : 2
       "rId#{base + @images.size}"
     end
+
+    def register_built_in_styles
+      # Headings
+      define_style :heading1, size: 24, bold: true
+      define_style :heading2, size: 18, bold: true
+      define_style :heading3, size: 14, bold: true
+      define_style :heading4, size: 12, bold: true
+      define_style :heading5, size: 11, bold: true, italic: true
+      define_style :heading6, size: 10, bold: true, italic: true
+
+      # Other built-in styles
+      define_style :title, size: 26, bold: true, align: :center
+      define_style :subtitle, size: 15, italic: true, color: "666666"
+      define_style :quote, italic: true, color: "666666", indent: 720
+      define_style :code, font: "Courier New", size: 10
+    end
   end
 end