The coderay method applies syntax highlighting to source code embedded in a webpage. The CodeRay highlighting engine is used for the HTML markup of the source code. The page sections to be highlighted are given as blocks of text to the coderay method.
Options can be passed to the CodeRay engine via attributes in the coderay method.
<% coderay( :lang => "ruby", :line_numbers => "inline" ) do -%> # Initializer for the class. def initialize( string ) @str = stirng end <% end -%>
The supported CodeRay options are the following:
:lang : the language to highlight (ruby, c, html, ...) :line_numbers : include line numbers in 'table', 'inline', or 'list' :line_number_start : where to start with line number counting :bold_every : make every n-th number appear bold :tab_width : convert tab characters to n spaces
# File lib/webby/helpers/coderay_helper.rb, line 55 def coderay( *args, &block ) opts = args.last.instance_of?(Hash) ? args.pop : {} text = capture_erb(&block) return if text.empty? defaults = ::Webby.site.coderay lang = opts.getopt(:lang, defaults.lang).to_sym cr_opts = {} %(line_numbers to_sym line_number_start to_i bold_every to_i tab_width to_i).each_slice(2) do |key,convert| key = key.to_sym val = opts.getopt(key, defaults[key]) next if val.nil? cr_opts[key] = val.send(convert) end #cr.swap(CodeRay.scan(text, lang).html(opts).div) out = %{<div class="CodeRay">\n<pre>} out << ::CodeRay.scan(text, lang).html(cr_opts) out << %{</pre>\n</div>} # put some guards around the output (specifically for textile) out = _guard(out) concat_erb(out, block.binding) return end
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