Syntax Coloring of Source Code
Trac supports language-specific syntax highlighting of source code in wiki formatted text and the repository browser.
To do this, Trac uses external libraries with support for a great number of programming languages.
Currently Trac supports syntax coloring using one or more of the following packages:
- GNU Enscript
- SilverCity
To activate syntax coloring, simply install either one (or more) of these packages. No additional configuration is required, however to modify the colors, have a look at trac/htdocs/css/code.css.
When in use, Trac will automatically prioritize SilverCity highlighting over Enscript if possible, (see note below).
If neither package is available, Trac will display the data as plain text.
Note: Enscript supports a greater number of languages, however SilverCity is generally faster since it is a library and isn't executed in an external process.
About SilverCity?
SilverCity uses the lexer from Scintilla. Scintilla supports more languages than SilverCity implements. If you want to add a language to SilverCity supported by Scintilla, it's not very difficult. See SilverCityAddLanguage for some information how.
Syntax Coloring Support
| SilverCity | Enscript | |
| Ada | X | |
| Asm | X | |
| * ASP | X | X |
| * C | X | X |
| * C++ | X | X |
| * Java | X | |
| Awk | X | |
| CSS | X | |
| Diff | X | |
| Eiffel | X | |
| Elisp | X | |
| Fortran | X | |
| Haskell | X | |
| HTML | X | X |
| IDL | X | |
| Javascript | X | X |
| m4 | X | |
| Makefile | X | |
| Matlab | X | |
| Objective-C | X | |
| Pascal | X | |
| * Perl | X | X |
| * PHP | X | X |
| PSP | X | |
| Pyrex | X | |
| * Python | X | X |
| * Ruby | X | X (1) |
| Scheme | X | |
| Shell | X | |
| SQL | X | X |
| Troff | X | |
| TCL | X | |
| Tex | X | |
| Verilog | X | |
| VHDL | X | |
| Visual Basic | X | |
| VRML | X | |
| XML | X | X |
(*) Supported as inline code blocks in Wiki text using WikiProcessors.
(1) Ruby highlighting is not included in the Enscript distribution. Highlighting rules for Ruby can be obtained from: http://neugierig.org/software/ruby/
Extra Software
- GNU Enscript -- http://people.ssh.fi/mtr/genscript/
- SilverCity -- http://silvercity.sf.net/
See also: WikiProcessors, WikiFormatting, TracWiki, TracBrowser
