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# Redmine - project management software

# Copyright (C) 2006-2014  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 SyntaxHighlighting

    class << self

      attr_reader :highlighter

      def highlighter=(name)

        if name.is_a?(Module)

          @highlighter = name

        else

          @highlighter = const_get(name)

        end

      end

      def highlight_by_filename(text, filename)

        highlighter.highlight_by_filename(text, filename)

      rescue

        ERB::Util.h(text)

      end

      def highlight_by_language(text, language)

        highlighter.highlight_by_language(text, language)

      rescue

        ERB::Util.h(text)

      end

    end

    module CodeRay

      require 'coderay'

      class << self

        # Highlights +text+ as the content of +filename+

        # Should not return line numbers nor outer pre tag

        def highlight_by_filename(text, filename)

          language = ::CodeRay::FileType[filename]

          language ? ::CodeRay.scan(text, language).html(:break_lines => true) : ERB::Util.h(text)

        end

        # Highlights +text+ using +language+ syntax

        # Should not return outer pre tag

        def highlight_by_language(text, language)

          ::CodeRay.scan(text, language).html(:wrap => :span)

        end

      end

    end

  end

  SyntaxHighlighting.highlighter = 'CodeRay'

end