summaryrefslogtreecommitdiffstats
path: root/lib/redmine/syntax_highlighting.rb
blob: 7480ebd16cc05ab209eb2a2659be5f596ca62c3f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
# Redmine - project management software
# Copyright (C) 2006-2016  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