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 hex format or 4-value CMYK.
+  - `: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]
+        append_color_tag(link_options[:color]) if link_options[:color]
         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]
+        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: nil,
+          underline: false
+        }
+      end
+
       def start_b
         append_text('<b>')
       end
@@ -82,9 +97,9 @@ def start_color
         rgb, c, m, y, k = current_attrs.values_at('rgb', 'c', 'm', 'y', 'k')
 
         if [c, m, y, k].all?
-          append_text("<color c=\"#{c}\" m=\"#{m}\" y=\"#{y}\" k=\"#{k}\">")
+          append_color_tag([c, m, y, k])
         else
-          append_text("<color rgb=\"#{rgb}\">")
+          append_color_tag(rgb)
         end
       end
 
@@ -103,6 +118,15 @@ def start_font
       def end_font
         append_text('</font>')
       end
+
+      def append_color_tag(color)
+        if color.is_a?(Array)
+          c, m, y, k = color
+          append_text("<color c=\"#{c}\" m=\"#{m}\" y=\"#{y}\" k=\"#{k}\">")
+        else
+          append_text("<color rgb=\"#{color}\">")
+        end
+      end
     end
   end
 end

spec/prawn/markup/processor/text_spec.rb

@@ -28,7 +28,7 @@
   it 'handles prawn color tag for cmyk' do
     processor.parse('hello <color c="22" m="55" y="79" k="30">world</color>')
     expect(text.strings).to eq(['hello ', 'world'])
-  end  
+  end
 
   it 'handles prawn font name' do
     processor.parse('hello <font name="Courier">world</font>')
@@ -49,4 +49,21 @@
     processor.parse('hello <font name="Courier" size="20">world</font>')
     expect(text.strings).to eq(['hello ', 'world'])
   end
+
+  context 'with_options' do
+    let(:options) do
+      {
+        link: {
+          color: "AAAAAA",
+          underline: true,
+        }
+      }
+    end
+
+    it 'creates links with provided options' do
+      processor.parse('hello <a href="http://example.com">world</a>')
+      expect(text.strings).to eq(['hello ', 'world'])
+      expect(top_positions).to eq([top, top].map(&:round))
+    end
+  end
 end

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: "AA0000", underline: true }
     }
     doc.markup(html)
     # lookatit