Changes between Version 6 and Version 7 of WikiProcessors


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Timestamp:
Mar 21, 2016, 6:54:06 PM (20 months ago)
Author:
trac
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  • WikiProcessors

    v6 v7  
    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{{{
    1460{{{
    1561#!html
    16 <pre class="wiki">{{{
     62<h1 style="color: grey">This is raw HTML</h1>
     63}}}
     64}}}
     65}}}
     66{{{#!td valign=top style="border: none; padding-left: 2em"
     67{{{
    1768#!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 
     69<h1 style="color: grey">This is raw HTML</h1>
     70}}}
     71}}}
     72|-----------------------------------------------------------------
     73{{{#!td colspan=2 align=center style="border: none"
     74
     75     __Example 2__: Highlighted Python code in a <div> block with custom style
     76}}}
     77|-----------------------------------------------------------------
     78{{{#!td style="border: none"
     79  {{{
     80  {{{#!div style="background: #ffd; border: 3px ridge"
     81
     82  This is an example of embedded "code" block:
     83
     84    {{{
     85    #!python
     86    def hello():
     87        return "world"
     88    }}}
     89
     90  }}}
     91  }}}
     92}}}
     93{{{#!td valign=top style="border: none; padding: 1em"
     94  {{{#!div style="background: #ffd; border: 3px ridge"
     95
     96  This is an example of embedded "code" block:
     97
     98    {{{
     99    #!python
     100    def hello():
     101        return "world"
     102    }}}
     103
     104  }}}
     105}}}
     106|-----------------------------------------------------------------
     107{{{#!td colspan=2 align=center style="border: none"
     108
     109     __Example 3__: Searching tickets from a wiki page, by keywords.
     110}}}
     111|-----------------------------------------------------------------
     112{{{#!td style="border: none"
     113  {{{
     114  {{{
     115  #!html
     116  <form action="/query" method="get"><div>
     117  <input type="text" name="keywords" value="~" size="30"/>
     118  <input type="submit" value="Search by Keywords"/>
     119  <!-- To control what fields show up use hidden fields
     120  <input type="hidden" name="col" value="id"/>
     121  <input type="hidden" name="col" value="summary"/>
     122  <input type="hidden" name="col" value="status"/>
     123  <input type="hidden" name="col" value="milestone"/>
     124  <input type="hidden" name="col" value="version"/>
     125  <input type="hidden" name="col" value="owner"/>
     126  <input type="hidden" name="col" value="priority"/>
     127  <input type="hidden" name="col" value="component"/>
     128  -->
     129  </div></form>
     130  }}}
     131  }}}
     132}}}
     133{{{#!td valign=top style="border: none; padding: 1em"
     134  {{{
     135  #!html
     136  <form action="/query" method="get"><div>
     137  <input type="text" name="keywords" value="~" size="30"/>
     138  <input type="submit" value="Search by Keywords"/>
     139  <!-- To control what fields show up use hidden fields
     140  <input type="hidden" name="col" value="id"/>
     141  <input type="hidden" name="col" value="summary"/>
     142  <input type="hidden" name="col" value="status"/>
     143  <input type="hidden" name="col" value="milestone"/>
     144  <input type="hidden" name="col" value="version"/>
     145  <input type="hidden" name="col" value="owner"/>
     146  <input type="hidden" name="col" value="priority"/>
     147  <input type="hidden" name="col" value="component"/>
     148  -->
     149  </div></form>
     150  }}}
     151}}}
    82152== Available Processors ==
     153
    83154The 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).
    90 
    91 === 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:
    109 {{{
     155
     156|| '''`#!default`''' || Present the text verbatim in a preformatted text block. This is the same as specifying ''no'' processor name (and no `#!`) ||
     157|| '''`#!comment`''' || Do not process the text in this section (i.e. contents exist only in the plain text - not in the rendered page). ||
     158|| '''`#!rtl`''' || Introduce a Right-To-Left block with appropriate CSS direction and styling ''(since 0.12.2)'' ||
     159|||| ||
     160||||= '''[=#HTMLrelated HTML related]''' =||
     161|| '''`#!html`''' || Insert custom HTML in a wiki page. ||
     162|| '''`#!htmlcomment`''' || Insert an HTML comment in a wiki page (''since 0.12''). ||
     163|| || 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.  ||
     164|| '''`#!div`''' || Wrap an arbitrary Wiki content inside a <div> element (''since 0.11''). ||
     165|| '''`#!span`''' || Wrap an arbitrary Wiki content inside a <span> element (''since 0.11''). ||
     166|| '''`#!td`''' || Wrap an arbitrary Wiki content inside a <td> element (''since 0.12'') ||
     167|| '''`#!th`''' || Wrap an arbitrary Wiki content inside a <th> element (''since 0.12'') ||
     168|| '''`#!tr`''' || Can optionally be used for wrapping `#!td` and `#!th` blocks, either for specifying row attributes or better visual grouping (''since 0.12'') ||
     169|| '''`#!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'') ||
     170|| || See WikiHtml for example usage and more details about these processors. ||
     171|||| ||
     172||||= '''Other Markups''' =||
     173|| '''`#!rst`''' || Trac support for Restructured Text. See WikiRestructuredText. ||
     174|| '''`#!textile`''' || Supported if [http://cheeseshop.python.org/pypi/textile Textile] is installed. See [http://www.textism.com/tools/textile/ a Textile reference]. ||
     175|||| ||
     176||||= '''[=#CodeHighlightingSupport Code Highlighting Support]''' =||
     177|| '''`#!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. ||
     178|||| ||
     179
     180Using the MIME type as processor, it is possible to syntax-highlight the same languages that are supported when browsing source code.
     181
     182||||= '''MIME Type Processors''' =||
     183{{{#!tr
     184{{{#!td
     185Some examples:
     186 {{{
    110187{{{
    111188#!text/html
    112189<h1>text</h1>
    113190}}}
    114 }}}
    115 
     191 }}}
     192}}}
     193{{{#!td
    116194The result will be syntax highlighted HTML code:
    117 {{{
     195 {{{
    118196#!text/html
    119197<h1>text</h1>
    120 }}}
    121 
    122 The same is valid for all other mime types supported.
    123 
     198 }}}
     199
     200The same is valid for all other [TracSyntaxColoring#SyntaxColoringSupport mime types supported].
     201}}}
     202}}}
     203{{{#!td
     204 {{{
     205{{{
     206#!diff
     207--- Version 55
     208+++ Version 56
     209@@ -115,8 +115,9 @@
     210     name='TracHelloWorld', version='1.0',
     211     packages=find_packages(exclude=['*.tests*']),
     212-    entry_points = """
     213-        [trac.plugins]
     214-        helloworld = myplugs.helloworld
     215-    """,
     216+    entry_points = {
     217+        'trac.plugins': [
     218+            'helloworld = myplugs.helloworld',
     219+        ],
     220+    },
     221 )
     222}}}
     223 }}}
     224}}}
     225{{{#!td
     226'''`#!diff`''' has a particularly nice renderer:
     227 {{{
     228#!diff
     229--- Version 55
     230+++ Version 56
     231@@ -115,8 +115,9 @@
     232     name='TracHelloWorld', version='1.0',
     233     packages=find_packages(exclude=['*.tests*']),
     234-    entry_points = """
     235-        [trac.plugins]
     236-        helloworld = myplugs.helloworld
     237-    """,
     238+    entry_points = {
     239+        'trac.plugins': [
     240+            'helloworld = myplugs.helloworld',
     241+        ],
     242+    },
     243 )
     244 }}}
     245}}}
    124246
    125247For more processor macros developed and/or contributed by users, visit:
    126248 * [trac:ProcessorBazaar]
    127249 * [trac:MacroBazaar]
    128  * [th:WikiStart Trac Hacks] community site
    129 
    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.
     250 * [http://trac-hacks.org Trac Hacks] community site
     251
     252Developing processors is no different from Wiki macros.
     253In fact they work the same way, only the usage syntax differs.
     254See WikiMacros#DevelopingCustomMacros for more information.
    133255
    134256