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Diffstat (limited to 'vnfmarket/src/main/webapp/vnfmarket/common/thirdparty/bootstrap/_plugins/example.rb')
-rw-r--r-- | vnfmarket/src/main/webapp/vnfmarket/common/thirdparty/bootstrap/_plugins/example.rb | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/vnfmarket/src/main/webapp/vnfmarket/common/thirdparty/bootstrap/_plugins/example.rb b/vnfmarket/src/main/webapp/vnfmarket/common/thirdparty/bootstrap/_plugins/example.rb new file mode 100644 index 00000000..91328972 --- /dev/null +++ b/vnfmarket/src/main/webapp/vnfmarket/common/thirdparty/bootstrap/_plugins/example.rb @@ -0,0 +1,95 @@ +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_-])+|"([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|[0-9_-])+|"[^"]*")?)?)/) 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] = false + else + raise SyntaxError.new <<-eos +Syntax Error in tag 'example' while parsing the following markup: + + #{markup} + +Valid syntax: example <lang> [id=foo] +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=\"bd-example\"" + (@options[:id] ? " data-example-id=\"#{@options[:id]}\"" : "") + ">\n#{output}\n</div>" + end + + def remove_holderjs(code) + code = code.gsub(/data-src="holder.js.+?"/, 'src="..."') + end + + def remove_example_classes(code) + # Find `bd-` classes and remove them from the highlighted code. Because of how this regex works, it will also + # remove classes that are after the `bd-` class. While this is a bug, I left it because it can be helpful too. + # To fix the bug, replace `(?=")` with `(?=("|\ ))`. + code = code.gsub(/(?!class=".)\ *?bd-.+?(?=")/, "") + # Find empty class attributes after the previous regex and remove those too. + code = code.gsub(/\ class=""/, "") + 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 = remove_holderjs(code) + code = remove_example_classes(code) + 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) |