obsolete.ChilliProject/lib/redmine/helpers/diff.rb

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2011-10-29 16:19:11 +04:00
#-- encoding: UTF-8
#-- copyright
# ChiliProject is a project management system.
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#
# Copyright (C) 2010-2012 the ChiliProject Team
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#
# 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.
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#
# See doc/COPYRIGHT.rdoc for more details.
#++
module Redmine
module Helpers
class Diff
include ERB::Util
include ActionView::Helpers::TagHelper
include ActionView::Helpers::TextHelper
attr_reader :diff, :words
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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+)/)
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words_from = words_from.select {|word| word != ' '}
@diff = words_from.diff @words
end
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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
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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(' ')
end
end
end
end