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= Wiki Processors =

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

The Wiki engine uses processors to allow using [wiki:WikiRestructuredText Restructured Text], [wiki:WikiHtml raw HTML] and [http://www.textism.com/tools/textile/ textile] in any Wiki text throughout Trac.


== Using Processors ==

To use a processor on a block of text, use a Wiki code block, selecting a processor by name using ''shebang 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>
}}}

Note that since 0.11, such blocks of HTML have to be self-contained, i.e. you can't start an HTML element in one block and close it later in a second block. Use div or span processors for achieving similar effect (see WikiHtml).

----

'''Example 2''' (''inserting Restructured Text in wiki text''):

{{{
#!html
<pre class="wiki">{{{
#!rst
A header
--------
This is some **text** with a footnote [*]_.

.. [*] This is the footnote.
}}}</pre>
}}}

'''Results in:'''
{{{
#!rst
A header
--------
This is some **text** with a footnote [*]_.

.. [*] This is the footnote.
}}}
----
'''Example 3''' (''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.
 * '''div''' -- Wrap an arbitrary Wiki content in a <div> element (''since 0.11''). See WikiHtml.
 * '''span''' -- Wrap an arbitrary Wiki content in a <span> element (''since 0.11''). See also WikiHtml.
 * '''rst''' -- Trac support for Restructured Text. See WikiRestructuredText.
 * '''textile''' -- Supported if [http://cheeseshop.python.org/pypi/textile Textile] is installed. See [http://www.textism.com/tools/textile/ a Textile reference].
 * '''comment''' -- Do not process the text in this section (i.e. contents exist only in the plain text - not in the rendered page).

=== Code Highlighting Support ===
Trac includes processors to provide inline [wiki:TracSyntaxColoring syntax highlighting] for the following languages:
 * '''c''' -- C
 * '''cpp''' -- C++
 * '''python''' -- Python
 * '''perl''' -- Perl
 * '''ruby''' -- Ruby
 * '''php''' -- PHP
 * '''asp''' -- ASP
 * '''java''' -- Java
 * '''js''' -- Javascript
 * '''sql''' -- SQL
 * '''xml''' -- XML
 * '''sh''' -- Bourne/Bash shell

'''Note:''' ''Trac relies on external software packages for syntax coloring. See TracSyntaxColoring for more info.''

By using the MIME type as processor, it is possible 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:
{{{
#!text/html
<h1>text</h1>
}}}

The same is valid for all other mime types supported.


For more processor macros developed and/or contributed by users, visit: 
 * [trac:ProcessorBazaar]
 * [trac:MacroBazaar]
 * [th:WikiStart Trac Hacks] community site


== Advanced Topics: Developing Processor Macros ==
Developing processors is no different from Wiki macros. In fact they work the same way, only the usage syntax differs. See WikiMacros for more information.


----
See also: WikiMacros, WikiHtml, WikiRestructuredText, TracSyntaxColoring, WikiFormatting, TracGuide

Wiki Processors

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

The Wiki engine uses processors to allow using Restructured Text, raw HTML and textile in any Wiki text throughout Trac.

Using Processors

To use a processor on a block of text, use a Wiki code block, selecting a processor by name using shebang notation (#!), familiar to most UNIX users from scripts.

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

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

Results in:

This is raw HTML

Note that since 0.11, such blocks of HTML have to be self-contained, i.e. you can't start an HTML element in one block and close it later in a second block. Use div or span processors for achieving similar effect (see WikiHtml).

Example 2 (inserting Restructured Text in wiki text):

{{{#!rstA header--------This is some **text** with a footnote [*]_... [*] This is the footnote.}}}

Results in:

A header
--------
This is some **text** with a footnote [*]_.
.. [*] This is the footnote.

Example 3 (inserting a block of C source code in wiki text):

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

Results in:

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.
  • div -- Wrap an arbitrary Wiki content in a
    element (since 0.11). See WikiHtml.
  • span -- Wrap an arbitrary Wiki content in a element (since 0.11). See also WikiHtml.
  • rst -- Trac support for Restructured Text. See WikiRestructuredText.
  • textile -- Supported if Textile is installed. See a Textile reference.
  • comment -- Do not process the text in this section (i.e. contents exist only in the plain text - not in the rendered page).

Code Highlighting Support

Trac includes processors to provide inline syntax highlighting for the following languages:

  • c -- C
  • cpp -- C++
  • python -- Python
  • perl -- Perl
  • ruby -- Ruby
  • php -- PHP
  • asp -- ASP
  • java -- Java
  • js -- Javascript
  • sql -- SQL
  • xml -- XML
  • sh -- Bourne/Bash shell

Note: Trac relies on external software packages for syntax coloring. See TracSyntaxColoring for more info.

By using the MIME type as processor, it is possible 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:

<h1>text</h1>

The same is valid for all other mime types supported.

For more processor macros developed and/or contributed by users, visit:

  • [trac:ProcessorBazaar]
  • [trac:MacroBazaar]
  • [th:WikiStart Trac Hacks] community site

Advanced Topics: Developing Processor Macros

Developing processors is no different from Wiki macros. In fact they work the same way, only the usage syntax differs. See WikiMacros for more information.

See also: WikiMacros, WikiHtml, WikiRestructuredText, TracSyntaxColoring, WikiFormatting, TracGuide