From a4bd413ca4e835fd3d1fdc24eebce67cd54231ca Mon Sep 17 00:00:00 2001
From: murphy <murphy@rubychan.de>
Date: Tue, 30 Sep 2008 16:42:53 +0000
Subject: New: *Simple Diff Scanner* (closes #22). * Highlights unified diffs,
 especially like the ones svn diff outputs. * Changes to make highlighting of
 whole lines were necessary. * I added two example files.

More changes:
* Added token classes :head, :delete, :insert, and :change along with styles.
* Added two new special token types: :begin_line and :end_line. They mark token groups that explicitly span whole lines and should be highlighted as such.
* The HTML encoder converts these new tokens to DIVs. May need more work.
* The Debug Encoder uses square brackets for line tokens.
* Some cleanups.
---
 lib/coderay/encoders/debug.rb             |  8 ++++++++
 lib/coderay/encoders/html.rb              | 27 ++++++++++++++++++++++++++-
 lib/coderay/encoders/html/numerization.rb |  4 +++-
 lib/coderay/encoders/html/output.rb       |  4 +++-
 4 files changed, 40 insertions(+), 3 deletions(-)

(limited to 'lib/coderay/encoders')

diff --git a/lib/coderay/encoders/debug.rb b/lib/coderay/encoders/debug.rb
index 8e1c0f0..a4b0648 100644
--- a/lib/coderay/encoders/debug.rb
+++ b/lib/coderay/encoders/debug.rb
@@ -35,6 +35,14 @@ module Encoders
       ">"
     end
 
+    def begin_line kind
+      "#{kind}["
+    end
+
+    def end_line kind
+      "]"
+    end
+
   end
 
 end
diff --git a/lib/coderay/encoders/html.rb b/lib/coderay/encoders/html.rb
index 2edcf1d..8d13cf5 100644
--- a/lib/coderay/encoders/html.rb
+++ b/lib/coderay/encoders/html.rb
@@ -226,13 +226,16 @@ module Encoders
           text = text.gsub(/#{HTML_ESCAPE_PATTERN}/o) { |m| @HTML_ESCAPE[m] }
         end
         @opened[0] = type
-        if style = @css_style[@opened]
+        if text != "\n" && style = @css_style[@opened]
           @out << style << text << '</span>'
         else
           @out << text
         end
       else
+        
         case text
+        
+        # token groups, eg. strings
         when :open
           @opened[0] = type
           @out << (@css_style[@opened] || '<span>')
@@ -248,6 +251,28 @@ module Encoders
             @out << '</span>'
             @opened.pop
           end
+        
+        # whole lines to be highlighted, eg. a deleted line in a diff
+        when :begin_line
+          @opened[0] = type
+          if style = @css_style[@opened]
+            @out << style.sub('<span', '<div')
+          else
+            @out << '<div>'
+          end
+          @opened << type
+        when :end_line
+          if @opened.empty?
+            # nothing to close
+          else
+            if $DEBUG and (@opened.size == 1 or @opened.last != type)
+              raise 'Malformed token stream: Trying to close a line (%p) \
+                that is not open. Open are: %p.' % [type, @opened[1..-1]]
+            end
+            @out << '</div>'
+            @opened.pop
+          end
+        
         when nil
           raise 'Token with nil as text was given: %p' % [[text, type]]
         else
diff --git a/lib/coderay/encoders/html/numerization.rb b/lib/coderay/encoders/html/numerization.rb
index d784bbe..9f1667f 100644
--- a/lib/coderay/encoders/html/numerization.rb
+++ b/lib/coderay/encoders/html/numerization.rb
@@ -71,6 +71,7 @@ module Encoders
           line_numbers.gsub!(/\n/) { "<tt>\n</tt>" }
 
           line_numbers_table_tpl = TABLE.apply('LINE_NUMBERS', line_numbers)
+          gsub!(/<\/div>\n/) { '</div>' }
           gsub!(/\n/) { "<tt>\n</tt>" }
           wrap_in! line_numbers_table_tpl
           @wrapped_in = :div
@@ -90,8 +91,9 @@ module Encoders
             end
             close = '</span>' * opened_tags.size
 
-            "<li>#{open}#{line}#{close}</li>"
+            "<li>#{open}#{line}#{close}</li>\n"
           end
+          chomp!("\n")
           wrap_in! LIST
           @wrapped_in = :div
 
diff --git a/lib/coderay/encoders/html/output.rb b/lib/coderay/encoders/html/output.rb
index e74e55e..8def95e 100644
--- a/lib/coderay/encoders/html/output.rb
+++ b/lib/coderay/encoders/html/output.rb
@@ -166,7 +166,9 @@ module Encoders
       # title="double click to expand"
 
       LIST = <<-`LIST`
-<ol class="CodeRay"><%CONTENT%></ol>
+<ol class="CodeRay">
+<%CONTENT%>
+</ol>
       LIST
 
       PAGE = <<-`PAGE`
-- 
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