From be877bc691190909b587454e7bb7c89818762338 Mon Sep 17 00:00:00 2001
From: Mark Otto <otto@github.com>
Date: Wed, 9 Jul 2014 20:00:22 -0700
Subject: plugins: add new example doodad hackery bullshitery and markdown
 block plugin for markdown includes

---
 docs/_plugins/highlight_alt.rb | 80 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 docs/_plugins/highlight_alt.rb

(limited to 'docs/_plugins/highlight_alt.rb')

diff --git a/docs/_plugins/highlight_alt.rb b/docs/_plugins/highlight_alt.rb
new file mode 100644
index 000000000..de84e759d
--- /dev/null
+++ b/docs/_plugins/highlight_alt.rb
@@ -0,0 +1,80 @@
+module Jekyll
+  module Tags
+    class ExampleBlock < Liquid::Block
+      include Liquid::StandardFilters
+
+      # The regular expression syntax checker. Start with the language specifier.
+      # Follow that by zero or more space separated options that take one of three
+      # forms: name, name=value, or name="<quoted list>"
+      #
+      # <quoted list> is a space-separated list of numbers
+      SYNTAX = /^([a-zA-Z0-9.+#-]+)((\s+\w+(=(\w+|"([0-9]+\s)*[0-9]+"))?)*)$/
+
+      def initialize(tag_name, markup, tokens)
+        super
+        if markup.strip =~ SYNTAX
+          @lang = $1.downcase
+          @options = {}
+          if defined?($2) && $2 != ''
+            # Split along 3 possible forms -- key="<quoted list>", key=value, or key
+            $2.scan(/(?:\w="[^"]*"|\w=\w|\w)+/) do |opt|
+              key, value = opt.split('=')
+              # If a quoted list, convert to array
+              if value && value.include?("\"")
+                  value.gsub!(/"/, "")
+                  value = value.split
+              end
+              @options[key.to_sym] = value || true
+            end
+          end
+          @options[:linenos] = "inline" if @options.key?(:linenos) and @options[:linenos] == true
+        else
+          raise SyntaxError.new <<-eos
+Syntax Error in tag 'highlight' while parsing the following markup:
+
+  #{markup}
+
+Valid syntax: highlight <lang> [linenos]
+eos
+        end
+      end
+
+      def render(context)
+        prefix = context["highlighter_prefix"] || ""
+        suffix = context["highlighter_suffix"] || ""
+        code = super.to_s.strip
+
+        output = case context.registers[:site].highlighter
+
+        when 'rouge'
+          render_rouge(code)
+        end
+
+        rendered_output = example(code) + add_code_tag(output)
+        prefix + rendered_output + suffix
+      end
+
+      def example(output)
+        "<div class=\"bs-example\">#{output}</div>"
+      end
+
+      def render_rouge(code)
+        require 'rouge'
+        formatter = Rouge::Formatters::HTML.new(line_numbers: @options[:linenos], wrap: false)
+        lexer = Rouge::Lexer.find_fancy(@lang, code) || Rouge::Lexers::PlainText
+        code = formatter.format(lexer.lex(code))
+        "<div class=\"highlight\"><pre>#{code}</pre></div>"
+      end
+
+      def add_code_tag(code)
+        # Add nested <code> tags to code blocks
+        code = code.sub(/<pre>\n*/,'<pre><code class="language-' + @lang.to_s.gsub("+", "-") + '" data-lang="' + @lang.to_s + '">')
+        code = code.sub(/\n*<\/pre>/,"</code></pre>")
+        code.strip
+      end
+
+    end
+  end
+end
+
+Liquid::Template.register_tag('example', Jekyll::Tags::ExampleBlock)
-- 
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