From 8badd0766a68aa9eec69e8784559a0f94024b130 Mon Sep 17 00:00:00 2001
From: Jacques Distler <distler@golem.ph.utexas.edu>
Date: Fri, 8 Jun 2007 01:23:09 -0500
Subject: [PATCH] Enhancements to sanitize.rb Options, options, ... options.

---
 lib/sanitize.rb | 59 ++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 54 insertions(+), 5 deletions(-)

diff --git a/lib/sanitize.rb b/lib/sanitize.rb
index 34d52e8c..a0221455 100644
--- a/lib/sanitize.rb
+++ b/lib/sanitize.rb
@@ -13,22 +13,71 @@ module Sanitize
 
   require 'html5lib/html5parser'
   require 'html5lib/liberalxmlparser'
-
   require 'html5lib/treewalkers'
+  require 'html5lib/treebuilders'
   require 'html5lib/serializer'
   require 'string_utils'
   require 'html5lib/sanitizer'
 
   include HTML5lib
 
-  def sanitize_xhtml(html)
-    XHTMLParser.parseFragment(html.to_ncr, {:tokenizer => HTMLSanitizer, :encoding=>'utf-8' }).to_s
+# Sanitize a string, parsed using XHTML parsing rules.
+#
+# :call-seq:
+#    sanitize_xhtml(string)                    -> string
+#    sanitize_xhtml(string, {:encoding => 'iso-8859-1', :to_tree => true}) -> REXML::Document
+#
+# Unless otherwise specified, the string is assumed to be utf-8 encoded.
+# By default, the output is a string. But, optionally, you can return a REXML tree.
+  def sanitize_xhtml(html, options = {})
+    @encoding = 'utf-8'
+    @treebuilder = TreeBuilders::REXML::TreeBuilder
+    @to_tree = false
+    options.each do |name, value|
+      next unless %w(encoding treebuilder to_tree).include? name.to_s
+      if name.to_s == 'treebuilder'
+        @treebuilder =  HTML5lib::TreeBuilders.getTreeBuilder(value)
+      else
+        instance_variable_set("@#{name}", value)
+      end
+    end
+    parsed = XHTMLParser.parseFragment(html.to_ncr, {:tokenizer => HTMLSanitizer,
+      :encoding => @encoding, :tree => @treebuilder })
+    return parsed if @to_tree
+    return parsed.to_s
   end
 
-  def sanitize_html(html)
-    HTMLParser.parseFragment(html, {:tokenizer => HTMLSanitizer, :encoding=>'utf-8' }).to_s
+# Sanitize a string, parsed using HTML parsing rules.
+#
+# :call-seq:
+#    sanitize_html(string)                    -> string
+#    sanitize_html(string, {:encoding => 'iso-8859-1', :to_tree => true}) -> REXML::Document
+#
+# Unless otherwise specified, the string is assumed to be utf-8 encoded.
+# By default, the output is a string. But, optionally, you can return a REXML tree.
+  def sanitize_html(html, options = {})
+    @encoding = 'utf-8'
+    @treebuilder = TreeBuilders::REXML::TreeBuilder
+    @to_tree = false
+    options.each do |name, value|
+      next unless %w(encoding treebuilder to_tree).include? name.to_s
+      if name.to_s == 'treebuilder'
+        @treebuilder =  HTML5lib::TreeBuilders.getTreeBuilder(value)
+      else
+        instance_variable_set("@#{name}", value)
+      end
+    end
+    parsed = HTMLParser.parseFragment(html.to_ncr, {:tokenizer => HTMLSanitizer,
+      :encoding => @encoding, :tree => @treebuilder })
+    return parsed if @to_tree
+    return parsed.to_s
   end
 
+# Sanitize a REXML tree. The output is a string.
+#
+# :call-seq:
+#    sanitize_rexml(tree)                    -> string
+#
   def sanitize_rexml(tree)
     tokens = TreeWalkers.getTreeWalker('rexml').new(tree.to_ncr)
     HTMLSerializer.serialize(tokens, {:encoding=>'utf-8',