User groups branch added.

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1372 e93f8b46-1217-0410-a6f0-8f06a7374b81

groups/app/helpers/search_helper.rb

@@ -0,0 +1,38 @@
+# redMine - project management software
+# Copyright (C) 2006-2007  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+module SearchHelper
+  def highlight_tokens(text, tokens)
+    return text unless text && tokens && !tokens.empty?
+    regexp = Regexp.new "(#{tokens.join('|')})", Regexp::IGNORECASE    
+    result = ''
+    text.split(regexp).each_with_index do |words, i|
+      if result.length > 1200
+        # maximum length of the preview reached
+        result << '...'
+        break
+      end
+      if i.even?
+        result << h(words.length > 100 ? "#{words[0..44]} ... #{words[-45..-1]}" : words)
+      else
+        t = (tokens.index(words.downcase) || 0) % 4
+        result << content_tag('span', h(words), :class => "highlight token-#{t}")
+      end
+    end
+    result
+  end
+end