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74 lines
2.4 KiB
74 lines
2.4 KiB
# Redmine - project management software
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# Copyright (C) 2006-2013 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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module Redmine
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module Helpers
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class Diff
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include ERB::Util
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include ActionView::Helpers::TagHelper
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include ActionView::Helpers::TextHelper
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attr_reader :diff, :words
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def initialize(content_to, content_from)
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@words = content_to.to_s.split(/(\s+)/)
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@words = @words.select {|word| word != ' '}
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words_from = content_from.to_s.split(/(\s+)/)
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words_from = words_from.select {|word| word != ' '}
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@diff = words_from.diff @words
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end
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def to_html
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words = self.words.collect{|word| h(word)}
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words_add = 0
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words_del = 0
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dels = 0
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del_off = 0
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diff.diffs.each do |diff|
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add_at = nil
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add_to = nil
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del_at = nil
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deleted = ""
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diff.each do |change|
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pos = change[1]
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if change[0] == "+"
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add_at = pos + dels unless add_at
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add_to = pos + dels
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words_add += 1
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else
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del_at = pos unless del_at
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deleted << ' ' unless deleted.empty?
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deleted << h(change[2])
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words_del += 1
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end
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end
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if add_at
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words[add_at] = '<span class="diff_in">'.html_safe + words[add_at]
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words[add_to] = words[add_to] + '</span>'.html_safe
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end
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if del_at
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words.insert del_at - del_off + dels + words_add, '<span class="diff_out">'.html_safe + deleted + '</span>'.html_safe
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dels += 1
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del_off += words_del
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words_del = 0
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end
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end
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words.join(' ').html_safe
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end
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end
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end
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end
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