Question

What are the possible module candidates for highlighting the source code shown in a node? Is there any module that does the task using Javascript?

Answer 1

I currently use GeSHi Filter for syntax highlighting for my personal code dumping ground and found it pretty useful. Some more details about this module (from its project page):

The GeShi Filter module provides a filter for source code syntax highlighting for a wide range of languages.

Source code can be entered with for example <code type="java">...</code> or <blockcode language="python">...</blockcode>. Starting from version 5.x-2.0 it is also possible to define your own generic and language specific tags (e.g. <java>) or to work with square bracket style tags (e.g. [python]). Automatically adding line numbers is possible too with for example [ruby linenumbers="normal"].