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openproject/lib/redmine/syntax_highlighting.rb

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#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2018 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 docs/COPYRIGHT.rdoc for more details.
#++
module Redmine
module SyntaxHighlighting
class << self
attr_reader :highlighter
delegate :highlight_by_filename, :highlight_by_language, to: :highlighter
def highlighter=(name)
if name.is_a?(Module)
@highlighter = name
else
@highlighter = const_get(name)
end
end
end
module CodeRay
require 'coderay'
require 'coderay/helpers/file_type'
class << self
# Highlights +text+ as the content of +filename+
# Should not return line numbers nor outer pre tag
# use CodeRay to scan normal text, since it's smart enough to find
# the correct source encoding before passing it to ERB::Util.html_escape
def highlight_by_filename(text, filename)
language = ::CodeRay::FileType[filename]
if language
::CodeRay.scan(text, language).html.html_safe
else
ERB::Util.h(::CodeRay.scan(text, :text).text)
end
end
# Highlights +text+ using +language+ syntax
# Should not return outer pre tag
def highlight_by_language(text, language)
::CodeRay.scan(text, language).html(line_numbers: :inline, wrap: :span)
end
end
end
end
SyntaxHighlighting.highlighter = 'CodeRay'
end