Changes between Version 3 and Version 4 of WikiProcessors


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Timestamp:
Jan 21, 2013, 6:45:25 PM (12 years ago)
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trac
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  • WikiProcessors

    v3 v4  
    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"
    1459{{{
    1560{{{
    1661#!html
    17 <h1 style="color: orange">This is raw HTML</h1>
    18 }}}
    19 }}}
    20 
    21 '''Results in:'''
     62<h1 style="color: grey">This is raw HTML</h1>
     63}}}
     64}}}
     65}}}
     66{{{#!td valign=top style="border: none; padding-left: 2em"
    2267{{{
    2368#!html
    24 <h1 style="color: orange">This is raw HTML</h1>
    25 }}}
    26 
    27 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).
    28 
    29 ----
    30 
    31 '''Example 2''' (''inserting Restructured Text in wiki text''):
    32 
    33 {{{
    34 {{{
    35 #!rst
    36 A header
    37 --------
    38 This is some **text** with a footnote [*]_.
    39 
    40 .. [*] This is the footnote.
    41 }}}
    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 {{{
    58 #!c
    59 int main(int argc, char *argv[])
    60 {
    61   printf("Hello World\n");
    62   return 0;
    63 }
    64 }}}
    65 }}}
    66 
    67 '''Results in:'''
    68 {{{
    69 #!c
    70 int main(int argc, char *argv[])
    71 {
    72   printf("Hello World\n");
    73   return 0;
    74 }
    75 }}}
    76 
    77 ----
    78 '''Example 4''' (''Searching from a wiki page by custom field. Allows user to reuse most common searches on a wiki page''):
    79 
    80 {{{
    81 {{{
    82 #!html
    83 <form action="/query" method="get">
    84 <input type="text" name="keywords" value="~" size="30"> <input type="submit" value="Search by Keywords#">
    85 <!-- To control what fields show up use hidden fields
    86 <input type="hidden" name="col" value="id">
    87 <input type="hidden" name="col" value="summary">
    88 <input type="hidden" name="col" value="status">
    89 <input type="hidden" name="col" value="milestone">
    90 <input type="hidden" name="col" value="version">
    91 <input type="hidden" name="col" value="owner">
    92 <input type="hidden" name="col" value="priority">
    93 <input type="hidden" name="col" value="component">
    94 -->
    95 </form>
    96 }}}
    97 }}}
    98 
    99 
    100 ''' Result:'''
    101 {{{
    102 #!html
    103 <form action="/query" method="get">
    104 <input type="text" name="keywords" value="~" size="30"> <input type="submit" value="Search by Keywords#">
    105 <!-- To control what fields show up use hidden fields
    106 <input type="hidden" name="col" value="id">
    107 <input type="hidden" name="col" value="summary">
    108 <input type="hidden" name="col" value="status">
    109 <input type="hidden" name="col" value="milestone">
    110 <input type="hidden" name="col" value="version">
    111 <input type="hidden" name="col" value="owner">
    112 <input type="hidden" name="col" value="priority">
    113 <input type="hidden" name="col" value="component">
    114 -->
    115 </form>
    116 }}}
    117 
    118 
    119 ----
    120 
     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}}}
    121152== Available Processors ==
     153
    122154The following processors are included in the Trac distribution:
    123  * '''html''' -- Insert custom HTML in a wiki page. See WikiHtml.
    124  * '''div''' -- Wrap an arbitrary Wiki content in a <div> element (''since 0.11''). See WikiHtml.
    125  * '''span''' -- Wrap an arbitrary Wiki content in a <span> element (''since 0.11''). See also WikiHtml.
    126  * '''rst''' -- Trac support for Restructured Text. See WikiRestructuredText.
    127  * '''textile''' -- Supported if [http://cheeseshop.python.org/pypi/textile Textile] is installed. See [http://www.textism.com/tools/textile/ a Textile reference].
    128  * '''comment''' -- Do not process the text in this section (i.e. contents exist only in the plain text that can be viewed when editing the wiki page content - not in the rendered page).
    129  * '''diff''' -- Pretty print patches and diffs.
    130 
    131 === Code Highlighting Support ===
    132 Trac includes processors to provide inline [wiki:TracSyntaxColoring syntax highlighting] for the following languages:
    133  * '''c''' -- C
    134  * '''cpp''' -- C++
    135  * '''csharp''' --- C#
    136  * '''python''' -- Python
    137  * '''perl''' -- Perl
    138  * '''ruby''' -- Ruby
    139  * '''php''' -- PHP
    140  * '''asp''' -- ASP
    141  * '''java''' -- Java
    142  * '''js''' -- Javascript
    143  * '''sql''' -- SQL
    144  * '''xml''' -- XML
    145  * '''sh''' -- Bourne/Bash shell
    146 
    147 '''Note:''' ''Trac relies on external software packages for syntax coloring. See TracSyntaxColoring for more info.''
    148 
    149 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:
    150 {{{
     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|||| ||
     159||||= '''HTML related''' =||
     160|| '''`#!html`''' || Insert custom HTML in a wiki page. ||
     161|| '''`#!htmlcomment`''' || Insert an HTML comment in a wiki page (''since 0.12''). ||
     162|| || 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.  ||
     163|| '''`#!div`''' || Wrap an arbitrary Wiki content inside a <div> element (''since 0.11''). ||
     164|| '''`#!span`''' || Wrap an arbitrary Wiki content inside a <span> element (''since 0.11''). ||
     165|| '''`#!td`''' || Wrap an arbitrary Wiki content inside a <td> element (''since 0.12'') ||
     166|| '''`#!th`''' || Wrap an arbitrary Wiki content inside a <th> element (''since 0.12'') ||
     167|| '''`#!tr`''' || Can optionally be used for wrapping `#!td` and `#!th` blocks, either for specifying row attributes of better visual grouping (''since 0.12'') ||
     168|| || See WikiHtml for example usage and more details about these processors. ||
     169|||| ||
     170||||= '''Other Markups''' =||
     171|| '''`#!rst`''' || Trac support for Restructured Text. See WikiRestructuredText. ||
     172|| '''`#!textile`''' || Supported if [http://cheeseshop.python.org/pypi/textile Textile] is installed. See [http://www.textism.com/tools/textile/ a Textile reference]. ||
     173|||| ||
     174||||= '''Code Highlighting Support''' =||
     175|| '''`#!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. ||
     176|||| ||
     177||||= '''MIME Type Processors''' =||
     178|||| Using the MIME type as processor, it is possible to syntax-highlight the same languages that are supported when browsing source code. ||
     179{{{#!tr
     180{{{#!td
     181Some examples:
     182 {{{
    151183{{{
    152184#!text/html
    153185<h1>text</h1>
    154186}}}
    155 }}}
    156 
     187 }}}
     188}}}
     189{{{#!td
    157190The result will be syntax highlighted HTML code:
    158 {{{
     191 {{{
    159192#!text/html
    160193<h1>text</h1>
    161 }}}
     194 }}}
    162195
    163196The same is valid for all other [TracSyntaxColoring#SyntaxColoringSupport mime types supported].
    164 
     197}}}
     198}}}
     199{{{#!td
     200 {{{
     201{{{
     202#!diff
     203--- Version 55
     204+++ Version 56
     205@@ -115,8 +115,9 @@
     206     name='TracHelloWorld', version='1.0',
     207     packages=find_packages(exclude=['*.tests*']),
     208-    entry_points = """
     209-        [trac.plugins]
     210-        helloworld = myplugs.helloworld
     211-    """,
     212+    entry_points = {
     213+        'trac.plugins': [
     214+            'helloworld = myplugs.helloworld',
     215+        ],
     216+    },
     217 )
     218}}}
     219 }}}
     220}}}
     221{{{#!td
     222'''`#!diff`''' has a particularly nice renderer:
     223 {{{
     224#!diff
     225--- Version 55
     226+++ Version 56
     227@@ -115,8 +115,9 @@
     228     name='TracHelloWorld', version='1.0',
     229     packages=find_packages(exclude=['*.tests*']),
     230-    entry_points = """
     231-        [trac.plugins]
     232-        helloworld = myplugs.helloworld
     233-    """,
     234+    entry_points = {
     235+        'trac.plugins': [
     236+            'helloworld = myplugs.helloworld',
     237+        ],
     238+    },
     239 )
     240 }}}
     241}}}
    165242
    166243For more processor macros developed and/or contributed by users, visit:
    167244 * [trac:ProcessorBazaar]
    168245 * [trac:MacroBazaar]
    169  * [th:WikiStart Trac Hacks] community site
    170 
    171 
    172 == Advanced Topics: Developing Processor Macros ==
    173 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.
     246 * [http://trac-hacks.org Trac Hacks] community site
     247
     248Developing processors is no different from Wiki macros.
     249In fact they work the same way, only the usage syntax differs.
     250See WikiMacros#DevelopingCustomMacros for more information.
    174251
    175252