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link: CodeRay
 | Try it!Paste your code | DownloadGem | Subversion | Documentation |
CodeRay is a fast syntax highlighting library written completely in Ruby.
It features fast HTML generation and a really advanced Ruby scanner.
Features
input languages
- C
- C++*
- CSS
- Delphi
- diff
- Groovy* (beta)
- HTML
- Java
- JavaScript
- JSON
- Nitro-XHTML
- PHP*
- Python*
- RHTML (ERB+HTML)
- Ruby
- Scheme (beta)
- SQL*
- XML
- YAML
output formats
- HTML (span/div/page)
- JSON*
- XML
- YAML
- Terminal* (beta)
tools
- comment filter*
- LoC counter* (beta)
- token statistiks
* = new in 0.9.1
basic features
- fast (some 100 KB/s)!
- safe (doesn't choke on bad code)
- plugin system for
- scanners
- encoders
- styles
- extensive test suite
- reusable representation of tokens
- reusable scanners and encoders
- token streaming (to save memory)
- scanner inheritance and inclusion
More features are planned for 1.0 and 1.1.
Usage & Live Demo
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require 'rubygems' require 'coderay' # output as HTML div (using inline CSS styles) puts CodeRay.scan('puts "Hello, world!"', :ruby).div # ...with line numbers puts CodeRay.scan("5.times do\n puts 'Hello, world!'\nend", :ruby).div(:line_numbers => :table) # output as standalone HTML page (using CSS classes) puts CodeRay.scan('puts "Hello, world!"', :ruby).page # keep scanned tokens for later use tokens = CodeRay.scan('{ "just": "an", "example": 42 }', :json) # produce a token statistic puts tokens.statistic # count the tokens tokens.count # => 26 # produce a HTML div, but with CSS classes puts tokens.div(:css => :class) # highlight a file (HTML div); guess the file type base on the extension # puts CodeRay.highlight_file('foo.erb.html') # get a new scanner for Python python_scanner = CodeRay.scanner :python # get a new encoder for terminal terminal_encoder = CodeRay.encoder :term # scanning into tokens tokens = python_scanner.tokenize 'import this; # The Zen of Python' # format the tokens puts terminal_encoder.encode_tokens(tokens) # re-using scanner and encoder ruby_highlighter = CodeRay::Duo[:ruby, :div] puts ruby_highlighter.encode('puts "Hello, world!"') |
More documentation is also available.