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35 lines
1.3 KiB
35 lines
1.3 KiB
13 years ago
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require 'pygments'
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require 'fileutils'
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require 'digest/md5'
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PYGMENTS_CACHE_DIR = File.expand_path('../../_code_cache', __FILE__)
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FileUtils.mkdir_p(PYGMENTS_CACHE_DIR)
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module HighlightCode
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def highlight(str, lang)
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str = pygments(str, lang).match(/<pre>(.+)<\/pre>/m)[1].to_s.gsub(/\s*$/, '') #strip out divs <div class="highlight">
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table = '<div class="highlight"><table cellpadding="0" cellspacing="0"><tr><td class="gutter"><pre class="line-numbers">'
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code = ''
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str.lines.each_with_index do |line,index|
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table += "<span class='line'>#{index+1}</span>\n"
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code += "<div class='line'>#{line}</div>"
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end
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table += "</pre></td><td class='code' width='100%'><pre><code class='#{lang}'>#{code}</code></pre></td></tr></table></div>"
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end
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def pygments(code, lang)
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if defined?(PYGMENTS_CACHE_DIR)
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path = File.join(PYGMENTS_CACHE_DIR, "#{lang}-#{Digest::MD5.hexdigest(code)}.html")
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if File.exist?(path)
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highlighted_code = File.read(path)
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else
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highlighted_code = Pygments.highlight(code, :lexer => lang, :formatter => 'html')
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File.open(path, 'w') {|f| f.print(highlighted_code) }
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end
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else
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highlighted_code = Pygments.highlight(code, :lexer => lang, :formatter => 'html')
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end
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highlighted_code
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end
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end
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