Update CodeRay version to 1.0 final (#4264).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@7618 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/gems/coderay-1.0.0/lib/coderay/encoders/terminal.rb

@@ -0,0 +1,179 @@
+module CodeRay
+  module Encoders
+    
+    # Outputs code highlighted for a color terminal.
+    # 
+    # Note: This encoder is in beta. It currently doesn't use the Styles.
+    # 
+    # Alias: +term+
+    # 
+    # == Authors & License
+    # 
+    # By Rob Aldred (http://robaldred.co.uk)
+    # 
+    # Based on idea by Nathan Weizenbaum (http://nex-3.com)
+    # 
+    # MIT License (http://www.opensource.org/licenses/mit-license.php)
+    class Terminal < Encoder
+      
+      register_for :terminal
+      
+      TOKEN_COLORS = {
+        :annotation => '35',
+        :attribute_name => '33',
+        :attribute_value => '31',
+        :binary => '1;35',
+        :char => {
+          :self => '36', :delimiter => '34'
+        },
+        :class => '1;35',
+        :class_variable => '36',
+        :color => '32',
+        :comment => '37',
+        :complex => '34',
+        :constant => ['34', '4'],
+        :decoration => '35',
+        :definition => '1;32',
+        :directive => ['32', '4'],
+        :doc => '46',
+        :doctype => '1;30',
+        :doc_string => ['31', '4'],
+        :entity => '33',
+        :error => ['1;33', '41'],
+        :exception => '1;31',
+        :float => '1;35',
+        :function => '1;34',
+        :global_variable => '42',
+        :hex => '1;36',
+        :include => '33',
+        :integer => '1;34',
+        :key => '35',
+        :label => '1;15',
+        :local_variable => '33',
+        :octal => '1;35',
+        :operator_name => '1;29',
+        :predefined_constant => '1;36',
+        :predefined_type => '1;30',
+        :predefined => ['4', '1;34'],
+        :preprocessor => '36',
+        :pseudo_class => '34',
+        :regexp => {
+          :self => '31',
+          :content => '31',
+          :delimiter => '1;29',
+          :modifier => '35',
+          :function => '1;29'
+        },
+        :reserved => '1;31',
+        :shell => {
+          :self => '42',
+          :content => '1;29',
+          :delimiter => '37',
+        },
+        :string => {
+          :self => '32',
+          :modifier => '1;32',
+          :escape => '1;36',
+          :delimiter => '1;32',
+        },
+        :symbol => '1;32',
+        :tag => '34',
+        :type => '1;34',
+        :value => '36',
+        :variable => '34',
+        
+        :insert => '42',
+        :delete => '41',
+        :change => '44',
+        :head => '45'
+      }
+      TOKEN_COLORS[:keyword] = TOKEN_COLORS[:reserved]
+      TOKEN_COLORS[:method] = TOKEN_COLORS[:function]
+      TOKEN_COLORS[:imaginary] = TOKEN_COLORS[:complex]
+      TOKEN_COLORS[:begin_group] = TOKEN_COLORS[:end_group] =
+        TOKEN_COLORS[:escape] = TOKEN_COLORS[:delimiter]
+      
+    protected
+      
+      def setup(options)
+        super
+        @opened = []
+        @subcolors = nil
+      end
+      
+    public
+      
+      def text_token text, kind
+        if color = (@subcolors || TOKEN_COLORS)[kind]
+          if Hash === color
+            if color[:self]
+              color = color[:self]
+            else
+              @out << text
+              return
+            end
+          end
+          
+          @out << ansi_colorize(color)
+          @out << text.gsub("\n", ansi_clear + "\n" + ansi_colorize(color))
+          @out << ansi_clear
+          @out << ansi_colorize(@subcolors[:self]) if @subcolors && @subcolors[:self]
+        else
+          @out << text
+        end
+      end
+      
+      def begin_group kind
+        @opened << kind
+        @out << open_token(kind)
+      end
+      alias begin_line begin_group
+      
+      def end_group kind
+        if @opened.empty?
+          # nothing to close
+        else
+          @opened.pop
+          @out << ansi_clear
+          @out << open_token(@opened.last)
+        end
+      end
+      
+      def end_line kind
+        if @opened.empty?
+          # nothing to close
+        else
+          @opened.pop
+          # whole lines to be highlighted,
+          # eg. added/modified/deleted lines in a diff
+          @out << "\t" * 100 + ansi_clear
+          @out << open_token(@opened.last)
+        end
+      end
+      
+    private
+      
+      def open_token kind
+        if color = TOKEN_COLORS[kind]
+          if Hash === color
+            @subcolors = color
+            ansi_colorize(color[:self]) if color[:self]
+          else
+            @subcolors = {}
+            ansi_colorize(color)
+          end
+        else
+          @subcolors = nil
+          ''
+        end
+      end
+      
+      def ansi_colorize(color)
+        Array(color).map { |c| "\e[#{c}m" }.join
+      end
+      def ansi_clear
+        ansi_colorize(0)
+      end
+    end
+  end
+end