view lib/redmine/helpers/diff.rb @ 1082:997f6d7738f7 bug_531

In repo controller entry action, show the page for the file even if it's binary (so user still has access to history etc links). This makes it possible to use the entry action as the default when a file is clicked on

# Redmine - project management software
# Copyright (C) 2006-2011  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 Redmine
  module Helpers
    class Diff
      include ERB::Util
      include ActionView::Helpers::TagHelper
      include ActionView::Helpers::TextHelper
      attr_reader :diff, :words

      def initialize(content_to, content_from)
        @words = content_to.to_s.split(/(\s+)/)
        @words = @words.select {|word| word != ' '}
        words_from = content_from.to_s.split(/(\s+)/)
        words_from = words_from.select {|word| word != ' '}
        @diff = words_from.diff @words
      end

      def to_html
        words = self.words.collect{|word| h(word)}
        words_add = 0
        words_del = 0
        dels = 0
        del_off = 0
        diff.diffs.each do |diff|
          add_at = nil
          add_to = nil
          del_at = nil
          deleted = ""
          diff.each do |change|
            pos = change[1]
            if change[0] == "+"
              add_at = pos + dels unless add_at
              add_to = pos + dels
              words_add += 1
            else
              del_at = pos unless del_at
              deleted << ' ' + h(change[2])
              words_del  += 1
            end
          end
          if add_at
            words[add_at] = '<span class="diff_in">' + words[add_at]
            words[add_to] = words[add_to] + '</span>'
          end
          if del_at
            words.insert del_at - del_off + dels + words_add, '<span class="diff_out">' + deleted + '</span>'
            dels += 1
            del_off += words_del
            words_del = 0
          end
        end
        words.join(' ').html_safe
      end
    end
  end
end