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Contents
To write your own custom highlighter module, you just need to:
# inherit from @Syntax::Convertors::Abstract@
# implement the @convert@ method
You can use the @syntax/convertors/html.rb@ file as an example:
{{{lang=ruby,number=true,caption=syntax/convertors/html.rb
require 'syntax/convertors/abstract'
module Syntax
module Convertors
# A simple class for converting a text into HTML.
class HTML < Abstract
# Converts the given text to HTML, using spans to represent token groups
# of any type but <tt>:normal</tt> (which is always unhighlighted). If
# +pre+ is +true+, the html is automatically wrapped in pre tags.
def convert( text, pre=true )
html = ""
html << "<pre>" if pre
regions = []
@tokenizer.tokenize( text ) do |tok|
value = html_escape(tok)
case tok.instruction
when :region_close then
regions.pop
html << "</span>"
when :region_open then
regions.push tok.group
html << "<span class=\"#{tok.group}\">#{value}"
else
if tok.group == ( regions.last || :normal )
html << value
else
html << "<span class=\"#{tok.group}\">#{value}</span>"
end
end
end
html << "</span>" while regions.pop
html << "</pre>" if pre
html
end
private
# Replaces some characters with their corresponding HTML entities.
def html_escape( string )
string.gsub( /&/, "&" ).
gsub( /</, "<" ).
gsub( />/, ">" ).
gsub( /"/, """ )
end
end
end
end
}}}
Within the @#convert@ method, you will automatically have access to the @tokenizer@ instance variable--instantiated for you by the framework. The rest is up to you.
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20 entries across 20 versions & 1 rubygems