Styling options for links

README.md

@@ -109,6 +109,9 @@ Beside these options handled by Prawn / prawn-table, the following values may be
   - `:radio`
     - `:checked`: The char to print for a checked radio. Default is '◉'.
     - `:unchecked`: The char to print for an unchecked radio. Default is '○'.
+- `:link`
+  - `:color`: The link color, which can be specified in either RGB or CMYK format.
+  - `:underline`: Specifies whether the link should be underlined. Default is false..
 
 ## Development
 

lib/prawn/markup/processor/text.rb

@@ -11,15 +11,30 @@ def self.prepended(base)
       end
 
       def start_a
+        start_u                           if link_options[:underline]
+        start_color(link_options[:color]) if link_options[:color].any?
         append_text("<link href=\"#{current_attrs['href']}\">")
       end
       alias start_link start_a
 
       def end_a
         append_text('</link>')
+        end_color if link_options[:color].any?
+        end_u     if link_options[:underline]
       end
       alias end_link end_a
 
+      def link_options
+        @link_options ||= HashMerger.deep(default_link_options, options[:link] || {})
+      end
+
+      def default_link_options
+        {
+          color: {},
+          underline: false
+        }
+      end
+
       def start_b
         append_text('<b>')
       end
@@ -78,8 +93,9 @@ def end_sup
         append_text('</sup>')
       end
 
-      def start_color
-        rgb, c, m, y, k = current_attrs.values_at('rgb', 'c', 'm', 'y', 'k')
+      def start_color(options = {})
+        options = current_attrs unless options.any?
+        rgb, c, m, y, k = options.transform_keys(&:to_s).values_at('rgb', 'c', 'm', 'y', 'k')
 
         if [c, m, y, k].all?
           append_text("<color c=\"#{c}\" m=\"#{m}\" y=\"#{y}\" k=\"#{k}\">")

spec/prawn/markup/showcase_spec.rb

@@ -19,7 +19,8 @@
       iframe: {
         placeholder: ->(src) { "Embedded content: #{src}" }
       },
-      input: { symbol_font: 'DejaVu', symbol_font_size: 16 }
+      input: { symbol_font: 'DejaVu', symbol_font_size: 16 },
+      link: { color: { rgb: "0000FF" }, underline: true }
     }
     doc.markup(html)
     # lookatit