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# 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
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