= Wiki Processors =
Processors are WikiMacros designed to provide alternative markup formats for the Wiki engine. Processors can be thought of as ''macro functions to process user-edited text''. 

The wiki engine uses processors to allow using [wiki:WikiHtml raw HTML] in any wiki text.

== Using Processors ==
To use a processor on a block of text, use a wiki blockquote, selecting a processor by name using 'hashbang notation' (#!), familiar to most UNIX users from scripts.

'''Example 1''' (''inserting raw HTML in a wiki text''):

{{{
#!html
<pre class="wiki">{{{
#!html
&lt;h1 style="color: orange"&gt;This is raw HTML&lt;/h1&gt;
}}}</pre>
}}}

'''Results in:'''
{{{
#!html
<h1 style="color: orange">This is raw HTML</h1>
}}}

----
'''Example 2''' (''inserting a block of C source code in wiki text''):

{{{
#!html
<pre class="wiki">{{{
#!c
int main(int argc, char *argv[])
{
  printf("Hello World\n");
  return 0;
}
}}}</pre>
}}}

'''Results in:'''
{{{
#!c
int main(int argc, char *argv[])
{
  printf("Hello World\n");
  return 0;
}
}}}

----



== Available Processors ==
The following processors are included in the Trac distribution:
 * '''html''' -- Insert custom HTML in a wiki page. See WikiHtml.
 * '''textile''' -- Initial support as of aug 2, 2004.  See [http://dealmeida.net/projects/textile/ Textile].

=== Source Code Support ===
The system includes processors to provide inline syntax highlighting] for these languages:
 * '''c''' -- C
 * '''cpp''' -- C++
 * '''python''' -- Python
 * '''perl''' -- Perl
 * '''ruby''' -- Ruby
 * '''php''' -- PHP
 * '''asp''' --- ASP
 * '''sql''' -- SQL
 * '''xml''' -- XML

By using the mime-type as processor, it is posible to syntax-highlight the same languages that are supported when browsing source code. 

For example, you can write:

{{{
{{{
#!text/html
<h1>text</h1>
}}}
}}}

The result will be syntax highlighted html code. The same is valid for all other mime types supported.

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See also : WikiMacros, WikiHtml, WikiFormatting, SystemGuide