Changes between Version 1 and Version 2 of WikiProcessors


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Mar 12, 2015, 4:35:26 PM (10 years ago)
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trac
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  • WikiProcessors

    v1 v2  
    1 = Wiki Processors =
     1= Wiki Processors
    22
    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.
    6 
    7 
    8 == Using Processors ==
    9 
    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 
     5Wiki processors can be used in any Wiki text throughout Trac, such as:
     6 - [#CodeHighlightingSupport syntax highlighting] or for rendering text verbatim
     7 - rendering [#HTMLrelated Wiki markup inside a context], like inside <div> blocks or <span> or within <td> or <th> table cells
     8 - using an alternative markup syntax, like [wiki:WikiHtml raw HTML] and [wiki:WikiRestructuredText Restructured Text] or [http://www.textism.com/tools/textile/ textile]
     9
     10== Using Processors
     11
     12To use a processor on a block of text, first delimit the lines using a Wiki ''code block'':
     13{{{
     14{{{
     15The lines
     16that should be processed...
     17}}}
     18}}}
     19
     20Immediately after the `{{{` or on the line just below, add `#!` followed by the ''processor name'':
     21
     22{{{
     23{{{
     24#!processorname
     25The lines
     26that should be processed...
     27}}}
     28}}}
     29
     30This is the "shebang" notation, familiar to most UNIX users.
     31
     32Besides their content, some Wiki processors can also accept ''parameters'', which are then given as `key=value` pairs after the processor name and on the same line. If `value` has to contain space, as it's often the case for the style parameter, a quoted string can be used (`key="value with space"`).
     33
     34As some processors are meant to process Wiki markup, it's quite possible to ''nest'' processor blocks.
     35You may want to indent the content of nested blocks for increased clarity, this extra indentation will be ignored when processing the content.
     36
     37== Examples
     38
     39||= Wiki Markup =||= Display =||
     40{{{#!td colspan=2 align=center style="border: none"
     41
     42                __Example 1__: Inserting raw HTML
     43}}}
     44|-----------------------------------------------------------------
     45{{{#!td style="border: none"
     46{{{
    1447{{{
    1548#!html
    16 <pre class="wiki">{{{
     49<h1 style="color: grey">This is raw HTML</h1>
     50}}}
     51}}}
     52}}}
     53{{{#!td valign=top style="border: none; padding-left: 2em"
     54{{{
    1755#!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 
    80 == Available Processors ==
     56<h1 style="color: grey">This is raw HTML</h1>
     57}}}
     58}}}
     59|-----------------------------------------------------------------
     60{{{#!td colspan=2 align=center style="border: none"
     61
     62     __Example 2__: Highlighted Python code in a <div> block with custom style
     63}}}
     64|-----------------------------------------------------------------
     65{{{#!td style="border: none"
     66  {{{
     67  {{{#!div style="background: #ffd; border: 3px ridge"
     68
     69  This is an example of embedded "code" block:
     70
     71    {{{
     72    #!python
     73    def hello():
     74        return "world"
     75    }}}
     76
     77  }}}
     78  }}}
     79}}}
     80{{{#!td valign=top style="border: none; padding: 1em"
     81  {{{#!div style="background: #ffd; border: 3px ridge"
     82
     83  This is an example of embedded "code" block:
     84
     85    {{{
     86    #!python
     87    def hello():
     88        return "world"
     89    }}}
     90
     91  }}}
     92}}}
     93|-----------------------------------------------------------------
     94{{{#!td colspan=2 align=center style="border: none"
     95
     96     __Example 3__: Searching tickets from a wiki page, by keywords.
     97}}}
     98|-----------------------------------------------------------------
     99{{{#!td style="border: none"
     100  {{{
     101  {{{
     102  #!html
     103  <form action="/query" method="get"><div>
     104  <input type="text" name="keywords" value="~" size="30"/>
     105  <input type="submit" value="Search by Keywords"/>
     106  <!-- To control what fields show up use hidden fields
     107  <input type="hidden" name="col" value="id"/>
     108  <input type="hidden" name="col" value="summary"/>
     109  <input type="hidden" name="col" value="status"/>
     110  <input type="hidden" name="col" value="milestone"/>
     111  <input type="hidden" name="col" value="version"/>
     112  <input type="hidden" name="col" value="owner"/>
     113  <input type="hidden" name="col" value="priority"/>
     114  <input type="hidden" name="col" value="component"/>
     115  -->
     116  </div></form>
     117  }}}
     118  }}}
     119}}}
     120{{{#!td valign=top style="border: none; padding: 1em"
     121  {{{
     122  #!html
     123  <form action="/query" method="get"><div>
     124  <input type="text" name="keywords" value="~" size="30"/>
     125  <input type="submit" value="Search by Keywords"/>
     126  <!-- To control what fields show up use hidden fields
     127  <input type="hidden" name="col" value="id"/>
     128  <input type="hidden" name="col" value="summary"/>
     129  <input type="hidden" name="col" value="status"/>
     130  <input type="hidden" name="col" value="milestone"/>
     131  <input type="hidden" name="col" value="version"/>
     132  <input type="hidden" name="col" value="owner"/>
     133  <input type="hidden" name="col" value="priority"/>
     134  <input type="hidden" name="col" value="component"/>
     135  -->
     136  </div></form>
     137  }}}
     138}}}
     139
     140== Available Processors
     141
    81142The 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.
    87 
    88 === 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:
    102 {{{
     143
     144|| '''`#!default`''' || Present the text verbatim in a preformatted text block. This is the same as specifying ''no'' processor name (and no `#!`) ||
     145|| '''`#!comment`''' || Do not process the text in this section, i.e. contents exist only in the plain text - not in the rendered page. ||
     146|| '''`#!rtl`''' || Introduce a Right-To-Left block with appropriate CSS direction and styling ''(since 0.12.2)'' ||
     147|||| ||
     148||||= '''[=#HTMLrelated HTML related]''' =||
     149|| '''`#!html`''' || Insert custom HTML in a wiki page. ||
     150|| '''`#!htmlcomment`''' || Insert an HTML comment in a wiki page (''since 0.12''). ||
     151|| || Note that `#!html` blocks 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 the following processors for achieving a similar effect.  ||
     152|| '''`#!div`''' || Wrap an arbitrary Wiki content inside a <div> element (''since 0.11''). ||
     153|| '''`#!span`''' || Wrap an arbitrary Wiki content inside a <span> element (''since 0.11''). ||
     154|| '''`#!td`''' || Wrap an arbitrary Wiki content inside a <td> element (''since 0.12'') ||
     155|| '''`#!th`''' || Wrap an arbitrary Wiki content inside a <th> element (''since 0.12'') ||
     156|| '''`#!tr`''' || Can optionally be used for wrapping `#!td` and `#!th` blocks, either for specifying row attributes or better visual grouping (''since 0.12'') ||
     157|| '''`#!table`''' || Can optionally be used for wrapping `#!tr`, `#!td` and `#!th` blocks, for specifying table attributes. One current limitation however is that tables cannot be nested. (''since 0.12'') ||
     158|| || See WikiHtml for example usage and more details about these processors. ||
     159|||| ||
     160||||= '''Other Markups''' =||
     161|| '''`#!rst`''' || Trac support for Restructured Text. See WikiRestructuredText. ||
     162|| '''`#!textile`''' || Supported if [http://cheeseshop.python.org/pypi/textile Textile] is installed. See [http://www.textism.com/tools/textile/ a Textile reference]. ||
     163|||| ||
     164||||= '''[=#CodeHighlightingSupport Code Highlighting Support]''' =||
     165|| '''`#!c`''' [[BR]] '''`#!cpp`''' (C++) [[BR]] '''`#!python`''' [[BR]] '''`#!perl`''' [[BR]] '''`#!ruby`''' [[BR]] '''`#!php`''' [[BR]] '''`#!asp`''' [[BR]] '''`#!java`''' [[BR]] '''`#!js`''' (Javascript) [[BR]] '''`#!sql`''' [[BR]] '''`#!xml`''' (XML or HTML) [[BR]] '''`#!sh`''' (!Bourne/Bash shell) [[BR]] '''etc.''' [[BR]] || Trac includes processors to provide inline syntax highlighting for source code in various languages. [[BR]] [[BR]] Trac relies on external software packages for syntax coloring, like [http://pygments.org Pygments]. [[BR]] [[BR]] See TracSyntaxColoring for information about which languages are supported and how to enable support for more languages. ||
     166|||| ||
     167
     168Using the MIME type as processor, it is possible to syntax-highlight the same languages that are supported when browsing source code.
     169
     170||||= '''MIME Type Processors''' =||
     171{{{#!tr
     172{{{#!td
     173Some examples:
     174 {{{
    103175{{{
    104176#!text/html
    105177<h1>text</h1>
    106178}}}
    107 }}}
    108 
    109 The result will be syntax highlighted HTML code. The same is valid for all other mime types supported.
    110 
     179 }}}
     180}}}
     181{{{#!td
     182The result will be syntax highlighted HTML code:
     183 {{{
     184#!text/html
     185<h1>text</h1>
     186 }}}
     187
     188The same is valid for all other [TracSyntaxColoring#SyntaxColoringSupport mime types supported].
     189}}}
     190}}}
     191{{{#!td
     192 {{{
     193{{{
     194#!diff
     195--- Version 55
     196+++ Version 56
     197@@ -115,8 +115,9 @@
     198     name='TracHelloWorld', version='1.0',
     199     packages=find_packages(exclude=['*.tests*']),
     200-    entry_points = """
     201-        [trac.plugins]
     202-        helloworld = myplugs.helloworld
     203-    """,
     204+    entry_points = {
     205+        'trac.plugins': [
     206+            'helloworld = myplugs.helloworld',
     207+        ],
     208+    },
     209 )
     210}}}
     211 }}}
     212}}}
     213{{{#!td
     214'''`#!diff`''' has a particularly nice renderer:
     215 {{{
     216#!diff
     217--- Version 55
     218+++ Version 56
     219@@ -115,8 +115,9 @@
     220     name='TracHelloWorld', version='1.0',
     221     packages=find_packages(exclude=['*.tests*']),
     222-    entry_points = """
     223-        [trac.plugins]
     224-        helloworld = myplugs.helloworld
     225-    """,
     226+    entry_points = {
     227+        'trac.plugins': [
     228+            'helloworld = myplugs.helloworld',
     229+        ],
     230+    },
     231 )
     232 }}}
     233}}}
    111234
    112235For 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 }}}
     236 * [http://trac-hacks.org Trac Hacks] community site
     237 * [trac:ProcessorBazaar]
     238 * [trac:MacroBazaar] [deprecated]
     239
     240Developing processors is no different from Wiki macros. In fact, they work the same way, only the usage syntax differs. See WikiMacros#DevelopingCustomMacros for more information.
    129241
    130242----