add link_text_block option

lib/twitter-text/autolink.rb

@@ -187,7 +187,8 @@ def html_escape(text)
       :username_url_base, :list_url_base, :hashtag_url_base, :cashtag_url_base,
       :username_url_block, :list_url_block, :hashtag_url_block, :link_url_block,
       :username_include_symbol, :suppress_lists, :suppress_no_follow, :url_entities,
-      :invisible_tag_attrs, :symbol_tag, :text_with_symbol_tag, :url_target, :link_attribute_block
+      :invisible_tag_attrs, :symbol_tag, :text_with_symbol_tag, :url_target,
+      :link_attribute_block, :link_text_block
     ]).freeze
 
     def extract_html_attrs_from_options!(options)
@@ -382,6 +383,7 @@ def link_to_text_with_symbol(entity, symbol, text, href, attributes = {}, option
     def link_to_text(entity, text, href, attributes = {}, options = {})
       attributes[:href] = href
       options[:link_attribute_block].call(entity, attributes) if options[:link_attribute_block]
+      text = options[:link_text_block].call(entity, text) if options[:link_text_block]
       %(<a#{tag_attrs(attributes)}>#{text}</a>)
     end
 

spec/autolinking_spec.rb

@@ -702,6 +702,25 @@ def original_text; "Single char file ext http://www.bestbuy.com/site/Currie+Tech
       linked.should match(/<a[^>]+dummy-url-attr=\"http:\/\/twitter.com\/\"/)
     end
 
+    it "should modify link text by link_text_block" do
+      linked = @linker.auto_link("#hash @mention",
+        :link_text_block => lambda{|entity, text|
+          entity[:hashtag] ? "#replaced" : "pre_#{text}_post"
+        }
+      )
+      linked.should match(/<a[^>]+>#replaced<\/a>/)
+      linked.should match(/<a[^>]+>pre_mention_post<\/a>/)
+
+      linked = @linker.auto_link("#hash @mention", {
+        :link_text_block => lambda{|entity, text|
+          "pre_#{text}_post"
+        },
+        :symbol_tag => "s", :text_with_symbol_tag => "b", :username_include_symbol => true
+      })
+      linked.should match(/<a[^>]+>pre_<s>#<\/s><b>hash<\/b>_post<\/a>/)
+      linked.should match(/<a[^>]+>pre_<s>@<\/s><b>mention<\/b>_post<\/a>/)
+    end
+
     it "should apply :url_target only to auto-linked URLs" do
       auto_linked = @linker.auto_link("#hashtag @mention http://test.com/", {:url_target => '_blank'})
       auto_linked.should have_autolinked_hashtag('#hashtag')