Changes between Version 1 and Version 2 of WikiProcessors


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Timestamp:
Apr 22, 2011, 2:33:41 PM (8 years ago)
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trac
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  • WikiProcessors

    v1 v2  
    33Processors 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''.
    44
    5 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.
     5Wiki processors can be used in any Wiki text throughout Trac,
     6for various different purposes, like:
     7 - [#CodeHighlightingSupport syntax highlighting] or for rendering text verbatim,
     8 - rendering [#HTMLrelated Wiki markup inside a context],
     9   like inside <div> blocks or <span> or within <td> or <th> table cells,
     10 - using an alternative markup syntax, like [wiki:WikiHtml raw HTML] and
     11   [wiki:WikiRestructuredText Restructured Text],
     12   or [http://www.textism.com/tools/textile/ textile]
    613
    714
    815== Using Processors ==
    916
    10 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.
    11 
    12 '''Example 1''' (''inserting raw HTML in a wiki text''):
    13 
     17To use a processor on a block of text, first delimit the lines using
     18a Wiki ''code block'':
     19{{{
     20{{{
     21The lines
     22that should be processed...
     23}}}
     24}}}
     25
     26Immediately after the `{{{` or on the line just below,
     27add `#!` followed by the ''processor name''.
     28
     29{{{
     30{{{
     31#!processorname
     32The lines
     33that should be processed...
     34}}}
     35}}}
     36
     37This is the "shebang" notation, familiar to most UNIX users.
     38
     39Besides their content, some Wiki processors can also accept ''parameters'',
     40which are then given as `key=value` pairs after the processor name,
     41on the same line. If `value` has to contain space, as it's often the case for
     42the style parameter, a quoted string can be used (`key="value with space"`).
     43
     44As some processors are meant to process Wiki markup, it's quite possible to
     45''nest'' processor blocks.
     46You may want to indent the content of nested blocks for increased clarity,
     47this extra indentation will be ignored when processing the content.
     48
     49
     50== Examples ==
     51
     52||= Wiki Markup =||= Display =||
     53{{{#!td colspan=2 align=center style="border: none"
     54
     55                __Example 1__: Inserting raw HTML
     56}}}
     57|-----------------------------------------------------------------
     58{{{#!td style="border: none"
     59{{{
     60{{{
     61<h1 style="color: grey">This is raw HTML</h1>
     62}}}
     63}}}
     64}}}
     65{{{#!td valign=top style="border: none; padding-left: 2em"
    1466{{{
    1567#!html
    16 <pre class="wiki">{{{
    17 #!html
    18 &lt;h1 style="color: orange"&gt;This is raw HTML&lt;/h1&gt;
    19 }}}</pre>
    20 }}}
    21 
    22 '''Results in:'''
    23 {{{
    24 #!html
    25 <h1 style="color: orange">This is raw HTML</h1>
    26 }}}
    27 
    28 ----
    29 
    30 '''Example 2''' (''inserting Restructured Text in wiki text''):
    31 
    32 {{{
    33 #!html
    34 <pre class="wiki">{{{
    35 #!rst
    36 A header
    37 --------
    38 This is some **text** with a footnote [*]_.
    39 
    40 .. [*] This is the footnote.
    41 }}}</pre>
    42 }}}
    43 
    44 '''Results in:'''
    45 {{{
    46 #!rst
    47 A header
    48 --------
    49 This is some **text** with a footnote [*]_.
    50 
    51 .. [*] This is the footnote.
    52 }}}
    53 ----
    54 '''Example 3''' (''inserting a block of C source code in wiki text''):
    55 
    56 {{{
    57 #!html
    58 <pre class="wiki">{{{
    59 #!c
    60 int main(int argc, char *argv[])
    61 {
    62   printf("Hello World\n");
    63   return 0;
    64 }
    65 }}}</pre>
    66 }}}
    67 
    68 '''Results in:'''
    69 {{{
    70 #!c
    71 int main(int argc, char *argv[])
    72 {
    73   printf("Hello World\n");
    74   return 0;
    75 }
    76 }}}
    77 
    78 ----
    79 
     68<h1 style="color: grey">This is raw HTML</h1>
     69}}}
     70}}}
     71|-----------------------------------------------------------------
     72{{{#!td colspan=2 align=center style="border: none"
     73
     74     __Example 2__: Highlighted Python code in a <div> block with custom style
     75}}}
     76|-----------------------------------------------------------------
     77{{{#!td style="border: none"
     78  {{{
     79  {{{#!div style="background: #ffd; border: 3px ridge"
     80
     81  This is an example of embedded "code" block:
     82
     83    {{{
     84    #!python
     85    def hello():
     86        return "world"
     87    }}}
     88
     89  }}}
     90  }}}
     91}}}
     92{{{#!td valign=top style="border: none; padding: 1em"
     93  {{{#!div style="background: #ffd; border: 3px ridge"
     94
     95  This is an example of embedded "code" block:
     96
     97    {{{
     98    #!python
     99    def hello():
     100        return "world"
     101    }}}
     102
     103  }}}
     104}}}
     105|-----------------------------------------------------------------
     106{{{#!td colspan=2 align=center style="border: none"
     107
     108     __Example 3__: Searching tickets from a wiki page, by keywords.
     109}}}
     110|-----------------------------------------------------------------
     111{{{#!td style="border: none"
     112  {{{
     113  {{{
     114  #!html
     115  <form action="/query" method="get"><div>
     116  <input type="text" name="keywords" value="~" size="30"/>
     117  <input type="submit" value="Search by Keywords"/>
     118  <!-- To control what fields show up use hidden fields
     119  <input type="hidden" name="col" value="id"/>
     120  <input type="hidden" name="col" value="summary"/>
     121  <input type="hidden" name="col" value="status"/>
     122  <input type="hidden" name="col" value="milestone"/>
     123  <input type="hidden" name="col" value="version"/>
     124  <input type="hidden" name="col" value="owner"/>
     125  <input type="hidden" name="col" value="priority"/>
     126  <input type="hidden" name="col" value="component"/>
     127  -->
     128  </div></form>
     129  }}}
     130  }}}
     131}}}
     132{{{#!td valign=top style="border: none; padding: 1em"
     133  {{{
     134  #!html
     135  <form action="/query" method="get"><div>
     136  <input type="text" name="keywords" value="~" size="30"/>
     137  <input type="submit" value="Search by Keywords"/>
     138  <!-- To control what fields show up use hidden fields
     139  <input type="hidden" name="col" value="id"/>
     140  <input type="hidden" name="col" value="summary"/>
     141  <input type="hidden" name="col" value="status"/>
     142  <input type="hidden" name="col" value="milestone"/>
     143  <input type="hidden" name="col" value="version"/>
     144  <input type="hidden" name="col" value="owner"/>
     145  <input type="hidden" name="col" value="priority"/>
     146  <input type="hidden" name="col" value="component"/>
     147  -->
     148  </div></form>
     149  }}}
     150}}}
    80151== Available Processors ==
     152
    81153The following processors are included in the Trac distribution:
    82  * '''html''' -- Insert custom HTML in a wiki page. See WikiHtml.
    83  * '''rst''' -- Trac support for Restructured Text. See WikiRestructuredText.
    84  * '''textile''' -- Supported if  [http://dealmeida.net/projects/textile/ Textile] is installed. See [http://hobix.com/textile/ a Textile reference].
    85 
    86 Textile link above is rotten. [http://www.textism.com/tools/textile/ this one] works, allows to test example.
     154
     155 `#!default` :: Present the text verbatim in a preformatted text block.
     156                This is the same as specifying ''no'' processor name
     157                (and no `#!`)
     158 `#!comment` :: Do not process the text in this section (i.e. contents exist
     159                only in the plain text - not in the rendered page).
     160
     161=== HTML related ===
     162
     163 `#!html`        :: Insert custom HTML in a wiki page.
     164 `#!htmlcomment` :: Insert an HTML comment in a wiki page (''since 0.12'').
     165
     166Note that `#!html` blocks have to be ''self-contained'',
     167i.e. you can't start an HTML element in one block and close it later in a second block. Use the following processors for achieving a similar effect.
     168
     169  `#!div` :: Wrap an arbitrary Wiki content inside a <div> element
     170             (''since 0.11'').
     171 `#!span` :: Wrap an arbitrary Wiki content inside a <span> element
     172             (''since 0.11'').
     173
     174 `#!td` :: Wrap an arbitrary Wiki content inside a <td> element (''since 0.12'')
     175 `#!th` :: Wrap an arbitrary Wiki content inside a <th> element (''since 0.12'')
     176 `#!tr` :: Can optionally be used for wrapping `#!td` and `#!th` blocks,
     177       either for specifying row attributes of better visual grouping
     178       (''since 0.12'')
     179
     180See WikiHtml for example usage and more details about these processors.
     181
     182=== Other Markups ===
     183
     184     `#!rst` :: Trac support for Restructured Text. See WikiRestructuredText.
     185 `#!textile` :: Supported if [http://cheeseshop.python.org/pypi/textile Textile]
     186                is installed.
     187                See [http://www.textism.com/tools/textile/ a Textile reference].
     188
    87189
    88190=== Code Highlighting Support ===
    89 Trac includes processors to provide inline [wiki:TracSyntaxColoring syntax highlighting] for the following languages:
    90  * '''c''' -- C
    91  * '''cpp''' -- C++
    92  * '''python''' -- Python
    93  * '''perl''' -- Perl
    94  * '''ruby''' -- Ruby
    95  * '''php''' -- PHP
    96  * '''asp''' --- ASP
    97  * '''sql''' -- SQL
    98  * '''xml''' -- XML
    99 '''Note:''' ''Trac relies on external software packages for syntax coloring. See TracSyntaxColoring for more info.''
    100 
    101 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:
     191
     192Trac includes processors to provide inline syntax highlighting:
     193 `#!c` (C), `#!cpp` (C++), `#!python` (Python), `#!perl` (Perl),
     194 `#!ruby` (Ruby), `#!php` (PHP), `#!asp` (ASP), `#!java` (Java),
     195 `#!js` (Javascript), `#!sql (SQL)`, `#!xml` (XML or HTML),
     196 `#!sh` (!Bourne/Bash shell), etc.
     197
     198Trac relies on external software packages for syntax coloring,
     199like [http://pygments.org Pygments].
     200
     201See TracSyntaxColoring for information about which languages
     202are supported and how to enable support for more languages.
     203
     204Note also that 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:
    102205{{{
    103206{{{
     
    107210}}}
    108211
    109 The result will be syntax highlighted HTML code. The same is valid for all other mime types supported.
     212The result will be syntax highlighted HTML code:
     213{{{
     214#!text/html
     215<h1>text</h1>
     216}}}
     217
     218The same is valid for all other [TracSyntaxColoring#SyntaxColoringSupport mime types supported].
    110219
    111220
    112221For more processor macros developed and/or contributed by users, visit:
    113  * [http://projects.edgewall.com/trac/wiki/ProcessorBazaar ProcessorBazaar]
    114  * [http://projects.edgewall.com/trac/wiki/MacroBazaar MacroBazaar]
    115 
    116 
    117 == Advanced Topics: Developing Processor Macros ==
    118 Developing processors is no different from WikiMacros. In fact they work the same way, only the usage syntax differs. See WikiMacros for more information.
    119 
    120 '''Example:''' (''Restructured Text Processor''):
    121 {{{
    122 #!python
    123 from docutils.core import publish_string
    124 
    125 def execute(hdf, text, env):
    126     html = publish_string(text, writer_name = 'html')
    127     return html[html.find('<body>')+6:html.find('</body>')].strip()
    128 }}}
     222 * [trac:ProcessorBazaar]
     223 * [trac:MacroBazaar]
     224 * [th:WikiStart Trac Hacks] community site
     225
     226Developing processors is no different from Wiki macros.
     227In fact they work the same way, only the usage syntax differs.
     228See WikiMacros#DevelopingCustomMacros for more information.
     229
    129230
    130231----
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