openproject/lib/open_project/text_formatting/truncation.rb

#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2017 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# 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.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

module OpenProject
  module TextFormatting
    module Truncation
      # Used for truncation
      include ActionView::Helpers::TextHelper

      # Truncates and returns the string as a single line
      def truncate_single_line(string, *args)
        truncate(string.to_s, *args).gsub(%r{[\r\n]+}m, ' ').html_safe
      end

      # Truncates at line break after 250 characters or options[:length]
      def truncate_lines(string, options = {})
        length = options[:length] || 250
        if string.to_s =~ /\A(.{#{length}}.*?)$/m
          "#{$1}..."
        else
          string
        end
      end
    end
  end
end