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f4b2c1a0d3
Patch by Yuichi HARADA. git-svn-id: http://svn.redmine.org/redmine/trunk@17847 e93f8b46-1217-0410-a6f0-8f06a7374b81
124 lines
3.8 KiB
Ruby
124 lines
3.8 KiB
Ruby
# Redmine - project management software
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# Copyright (C) 2006-2017 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 SyntaxHighlighting
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class << self
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attr_reader :highlighter
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def highlighter=(name)
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if name.is_a?(Module)
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@highlighter = name
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else
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@highlighter = const_get(name)
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end
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end
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def highlight_by_filename(text, filename)
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highlighter.highlight_by_filename(text, filename)
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rescue
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ERB::Util.h(text)
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end
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def highlight_by_language(text, language)
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highlighter.highlight_by_language(text, language)
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rescue
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ERB::Util.h(text)
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end
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def language_supported?(language)
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if highlighter.respond_to? :language_supported?
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highlighter.language_supported? language
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else
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true
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end
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rescue
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false
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end
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end
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module Rouge
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require 'rouge'
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# Customized formatter based on Rouge::Formatters::HTMLLinewise
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# Syntax highlighting is completed within each line.
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class CustomHTMLLinewise < ::Rouge::Formatter
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def initialize(formatter)
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@formatter = formatter
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end
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def stream(tokens, &b)
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token_lines(tokens) do |line|
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line.each do |tok, val|
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yield @formatter.span(tok, val)
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end
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yield "\n"
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end
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end
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end
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class << self
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# Highlights +text+ as the content of +filename+
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# Should not return line numbers nor outer pre tag
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def highlight_by_filename(text, filename)
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# TODO: Delete the following workaround for #30434 and
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# test_syntax_highlight_should_normalize_line_endings in
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# application_helper_test.rb when Rouge is improved to
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# handle CRLF properly.
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# See also: https://github.com/jneen/rouge/pull/1078
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text = text.gsub(/\r\n?/, "\n")
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lexer =::Rouge::Lexer.guess_by_filename(filename)
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formatter = ::Rouge::Formatters::HTML.new
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::Rouge.highlight(text, lexer, CustomHTMLLinewise.new(formatter))
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end
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# Highlights +text+ using +language+ syntax
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# Should not return outer pre tag
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def highlight_by_language(text, language)
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lexer =
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find_lexer(language.to_s.downcase) || ::Rouge::Lexers::PlainText
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::Rouge.highlight(text, lexer, ::Rouge::Formatters::HTML)
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end
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def language_supported?(language)
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find_lexer(language.to_s.downcase) ? true : false
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end
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private
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# Alias names used by CodeRay and not supported by Rouge
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LANG_ALIASES = {
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'delphi' => 'pascal',
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'cplusplus' => 'cpp',
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'ecmascript' => 'javascript',
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'ecma_script' => 'javascript',
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'java_script' => 'javascript',
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'xhtml' => 'html'
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}
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def find_lexer(language)
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::Rouge::Lexer.find(language) ||
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::Rouge::Lexer.find(LANG_ALIASES[language])
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end
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end
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end
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end
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SyntaxHighlighting.highlighter = 'Rouge'
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end
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