From aa9229ff97a7d7252c52cf1df5bc076871f4b197 Mon Sep 17 00:00:00 2001
From: Kornelius Kalnbach <murphy@rubychan.de>
Date: Tue, 7 Jun 2016 10:32:57 +0200
Subject: use EscapeUtils

---
 coderay.gemspec              |  2 ++
 lib/coderay/encoders/html.rb | 40 ++--------------------------------------
 2 files changed, 4 insertions(+), 38 deletions(-)

diff --git a/coderay.gemspec b/coderay.gemspec
index 328b94c..6da3e1d 100644
--- a/coderay.gemspec
+++ b/coderay.gemspec
@@ -32,4 +32,6 @@ Gem::Specification.new do |s|
   s.rubyforge_project = s.name
   s.rdoc_options      = '-SNw2', "-m#{readme_file}", '-t CodeRay Documentation'
   s.extra_rdoc_files  = readme_file
+
+  s.add_dependency 'escape_utils', '>= 1.0'
 end
diff --git a/lib/coderay/encoders/html.rb b/lib/coderay/encoders/html.rb
index 55b1291..a00ed47 100644
--- a/lib/coderay/encoders/html.rb
+++ b/lib/coderay/encoders/html.rb
@@ -1,4 +1,5 @@
 require 'set'
+require 'escape_utils'
 
 module CodeRay
 module Encoders
@@ -127,21 +128,6 @@ module Encoders
     
   protected
     
-    def self.make_html_escape_hash
-      {
-        '&'  => '&amp;',
-        '>'  => '&gt;',
-        '<'  => '&lt;',
-        "\t" => ' ' * DEFAULT_OPTIONS[:tab_width],
-      }.tap do |hash|
-        # Escape ASCII control codes except \x9 == \t and \xA == \n.
-        (Array(0x00..0x8) + Array(0xB..0x1F)).each { |invalid| hash[invalid.chr] = ' ' }
-      end
-    end
-    
-    HTML_ESCAPE = make_html_escape_hash
-    HTML_ESCAPE_PATTERN = /[\t&><\0-\x8\xB-\x1F]/
-    
     TOKEN_KIND_TO_INFO = Hash.new do |h, kind|
       h[kind] = kind.to_s.gsub(/_/, ' ').gsub(/\b\w/) { $&.capitalize }
     end
@@ -180,8 +166,6 @@ module Encoders
       
       @break_lines = (options[:break_lines] == true)
       
-      @escape_cache = make_escape_cache(options)
-      
       @opened = []
       @last_opened = nil
       @css = CSS.new options[:style]
@@ -220,7 +204,7 @@ module Encoders
     def text_token text, kind
       style = @span_for_kinds[@last_opened ? [kind, *@opened] : kind]
       
-      text = @escape_cache[text] if text.size <= 1 || text =~ /#{HTML_ESCAPE_PATTERN}/o
+      text = EscapeUtils.escape_html text
       text = break_lines(text, style) if @break_lines && (style || @opened.size > 0) && text.index("\n")
       
       if style
@@ -276,26 +260,6 @@ module Encoders
       options[:break_lines] = true if options[:line_numbers] == :inline
     end
     
-    def make_escape_cache options
-      html_escape =
-        if options[:tab_width] == DEFAULT_OPTIONS[:tab_width]
-          HTML_ESCAPE
-        else
-          HTML_ESCAPE.merge("\t" => options[:tab_width] ? ' ' * options[:tab_width] : "\t")
-        end
-      
-      Hash.new do |cache, text|
-        cache.clear if cache.size >= 100
-        
-        cache[text] =
-          if text =~ /#{HTML_ESCAPE_PATTERN}/o
-            text.gsub(/#{HTML_ESCAPE_PATTERN}/o) { |m| html_escape[m] }
-          else
-            text
-          end
-      end
-    end
-    
     def css_class_for_kinds kinds
       TokenKinds[kinds.is_a?(Symbol) ? kinds : kinds.first]
     end
-- 
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