Changes between Version 2 and Version 3 of WikiProcessors


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Timestamp:
Apr 4, 2012, 2:28:09 PM (13 years ago)
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trac
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  • WikiProcessors

    v2 v3  
    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 `{{{
     27` or on the line just below,
     28add `#!` followed by the ''processor name''.
     29
     30{{{
     31{{{
     32#!processorname
     33The lines
     34that should be processed...
     35}}}
     36}}}
     37
     38This is the "shebang" notation, familiar to most UNIX users.
     39
     40Besides their content, some Wiki processors can also accept ''parameters'',
     41which are then given as `key=value` pairs after the processor name,
     42on the same line. If `value` has to contain space, as it's often the case for
     43the style parameter, a quoted string can be used (`key="value with space"`).
     44
     45As some processors are meant to process Wiki markup, it's quite possible to
     46''nest'' processor blocks.
     47You may want to indent the content of nested blocks for increased clarity,
     48this extra indentation will be ignored when processing the content.
     49
     50
     51== Examples ==
     52
     53||= Wiki Markup =||= Display =||
     54{{{
     55#!td colspan=2 align=center style="border: none"
     56
     57                __Example 1__: Inserting raw HTML
     58}}}
     59|-----------------------------------------------------------------
     60{{{
     61#!td style="border: none"
     62{{{
     63{{{
     64<h1 style="color: grey">This is raw HTML</h1>
     65}}}
     66}}}
     67}}}
     68{{{
     69#!td valign=top style="border: none; padding-left: 2em"
    1470{{{
    1571#!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 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).
    29 
    30 ----
    31 
    32 '''Example 2''' (''inserting Restructured Text in wiki text''):
    33 
    34 {{{
    35 #!html
    36 <pre class="wiki">{{{
    37 #!rst
    38 A header
    39 --------
    40 This is some **text** with a footnote [*]_.
    41 
    42 .. [*] This is the footnote.
    43 }}}</pre>
    44 }}}
    45 
    46 '''Results in:'''
    47 {{{
    48 #!rst
    49 A header
    50 --------
    51 This is some **text** with a footnote [*]_.
    52 
    53 .. [*] This is the footnote.
    54 }}}
    55 ----
    56 '''Example 3''' (''inserting a block of C source code in wiki text''):
    57 
    58 {{{
    59 #!html
    60 <pre class="wiki">{{{
    61 #!c
    62 int main(int argc, char *argv[])
    63 {
    64   printf("Hello World\n");
    65   return 0;
    66 }
    67 }}}</pre>
    68 }}}
    69 
    70 '''Results in:'''
    71 {{{
    72 #!c
    73 int main(int argc, char *argv[])
    74 {
    75   printf("Hello World\n");
    76   return 0;
    77 }
    78 }}}
    79 
    80 ----
    81 
     72<h1 style="color: grey">This is raw HTML</h1>
     73}}}
     74}}}
     75|-----------------------------------------------------------------
     76{{{
     77#!td colspan=2 align=center style="border: none"
     78
     79     __Example 2__: Highlighted Python code in a <div> block with custom style
     80}}}
     81|-----------------------------------------------------------------
     82{{{
     83#!td style="border: none"
     84  {{{
     85  {{{
     86#!div style="background: #ffd; border: 3px ridge"
     87
     88  This is an example of embedded "code" block:
     89
     90    {{{
     91    #!python
     92    def hello():
     93        return "world"
     94   
     95}}}
     96
     97 
     98}}}
     99 
     100}}}
     101}}}
     102{{{
     103#!td valign=top style="border: none; padding: 1em"
     104  {{{
     105#!div style="background: #ffd; border: 3px ridge"
     106
     107  This is an example of embedded "code" block:
     108
     109    {{{
     110    #!python
     111    def hello():
     112        return "world"
     113   
     114}}}
     115
     116 
     117}}}
     118}}}
     119|-----------------------------------------------------------------
     120{{{
     121#!td colspan=2 align=center style="border: none"
     122
     123     __Example 3__: Searching tickets from a wiki page, by keywords.
     124}}}
     125|-----------------------------------------------------------------
     126{{{
     127#!td style="border: none"
     128  {{{
     129  {{{
     130  #!html
     131  <form action="/query" method="get">
     132  <input type="text" name="keywords" value="~" size="30">
     133  <input type="submit" value="Search by Keywords">
     134  <!-- To control what fields show up use hidden fields
     135  <input type="hidden" name="col" value="id">
     136  <input type="hidden" name="col" value="summary">
     137  <input type="hidden" name="col" value="status">
     138  <input type="hidden" name="col" value="milestone">
     139  <input type="hidden" name="col" value="version">
     140  <input type="hidden" name="col" value="owner">
     141  <input type="hidden" name="col" value="priority">
     142  <input type="hidden" name="col" value="component">
     143  -->
     144  </form>
     145 
     146}}}
     147 
     148}}}
     149}}}
     150{{{
     151#!td valign=top style="border: none; padding: 1em"
     152  {{{
     153  #!html
     154  <form action="/query" method="get">
     155  <input type="text" name="keywords" value="~" size="30">
     156  <input type="submit" value="Search by Keywords">
     157  <!-- To control what fields show up use hidden fields
     158  <input type="hidden" name="col" value="id">
     159  <input type="hidden" name="col" value="summary">
     160  <input type="hidden" name="col" value="status">
     161  <input type="hidden" name="col" value="milestone">
     162  <input type="hidden" name="col" value="version">
     163  <input type="hidden" name="col" value="owner">
     164  <input type="hidden" name="col" value="priority">
     165  <input type="hidden" name="col" value="component">
     166  -->
     167  </form>
     168 
     169}}}
     170}}}
    82171== Available Processors ==
     172
    83173The following processors are included in the Trac distribution:
    84  * '''html''' -- Insert custom HTML in a wiki page. See WikiHtml.
    85  * '''div''' -- Wrap an arbitrary Wiki content in a <div> element (''since 0.11''). See WikiHtml.
    86  * '''span''' -- Wrap an arbitrary Wiki content in a <span> element (''since 0.11''). See also WikiHtml.
    87  * '''rst''' -- Trac support for Restructured Text. See WikiRestructuredText.
    88  * '''textile''' -- Supported if [http://cheeseshop.python.org/pypi/textile Textile] is installed. See [http://www.textism.com/tools/textile/ a Textile reference].
    89  * '''comment''' -- Do not process the text in this section (i.e. contents exist only in the plain text - not in the rendered page).
     174
     175 `#!default` :: Present the text verbatim in a preformatted text block.
     176                This is the same as specifying ''no'' processor name
     177                (and no `#!`)
     178 `#!comment` :: Do not process the text in this section (i.e. contents exist
     179                only in the plain text - not in the rendered page).
     180
     181=== HTML related ===
     182
     183 `#!html`        :: Insert custom HTML in a wiki page.
     184 `#!htmlcomment` :: Insert an HTML comment in a wiki page (''since 0.12'').
     185
     186Note that `#!html` blocks have to be ''self-contained'',
     187i.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.
     188
     189  `#!div` :: Wrap an arbitrary Wiki content inside a <div> element
     190             (''since 0.11'').
     191 `#!span` :: Wrap an arbitrary Wiki content inside a <span> element
     192             (''since 0.11'').
     193
     194 `#!td` :: Wrap an arbitrary Wiki content inside a <td> element (''since 0.12'')
     195 `#!th` :: Wrap an arbitrary Wiki content inside a <th> element (''since 0.12'')
     196 `#!tr` :: Can optionally be used for wrapping `#!td` and `#!th` blocks,
     197       either for specifying row attributes of better visual grouping
     198       (''since 0.12'')
     199
     200See WikiHtml for example usage and more details about these processors.
     201
     202=== Other Markups ===
     203
     204     `#!rst` :: Trac support for Restructured Text. See WikiRestructuredText.
     205 `#!textile` :: Supported if [http://cheeseshop.python.org/pypi/textile Textile]
     206                is installed.
     207                See [http://www.textism.com/tools/textile/ a Textile reference].
     208
    90209
    91210=== Code Highlighting Support ===
    92 Trac includes processors to provide inline [wiki:TracSyntaxColoring syntax highlighting] for the following languages:
    93  * '''c''' -- C
    94  * '''cpp''' -- C++
    95  * '''python''' -- Python
    96  * '''perl''' -- Perl
    97  * '''ruby''' -- Ruby
    98  * '''php''' -- PHP
    99  * '''asp''' -- ASP
    100  * '''java''' -- Java
    101  * '''js''' -- Javascript
    102  * '''sql''' -- SQL
    103  * '''xml''' -- XML
    104  * '''sh''' -- Bourne/Bash shell
    105 
    106 '''Note:''' ''Trac relies on external software packages for syntax coloring. See TracSyntaxColoring for more info.''
    107 
    108 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:
     211
     212Trac includes processors to provide inline syntax highlighting:
     213 `#!c` (C), `#!cpp` (C++), `#!python` (Python), `#!perl` (Perl),
     214 `#!ruby` (Ruby), `#!php` (PHP), `#!asp` (ASP), `#!java` (Java),
     215 `#!js` (Javascript), `#!sql (SQL)`, `#!xml` (XML or HTML),
     216 `#!sh` (!Bourne/Bash shell), etc.
     217
     218Trac relies on external software packages for syntax coloring,
     219like [http://pygments.org Pygments].
     220
     221See TracSyntaxColoring for information about which languages
     222are supported and how to enable support for more languages.
     223
     224Note 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:
    109225{{{
    110226{{{
    … …  
    120236}}}
    121237
    122 The same is valid for all other mime types supported.
     238The same is valid for all other [TracSyntaxColoring#SyntaxColoringSupport mime types supported].
    123239
    124240
    … …  
    128244 * [th:WikiStart Trac Hacks] community site
    129245
    130 
    131 == Advanced Topics: Developing Processor Macros ==
    132 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.
     246Developing processors is no different from Wiki macros.
     247In fact they work the same way, only the usage syntax differs.
     248See WikiMacros#DevelopingCustomMacros for more information.
    133249
    134250
    135251----
    136252See also: WikiMacros, WikiHtml, WikiRestructuredText, TracSyntaxColoring, WikiFormatting, TracGuide
     253
     254