Changes between Version 1 and Version 2 of WikiHtml


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Jul 30, 2012 5:32:32 PM (12 years ago)
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trac
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  • WikiHtml

    v1 v2  
    11= Using HTML in Wiki Text = 
    22 
    3 Trac supports inserting HTML into any wiki context, accomplished using the HTML [wiki:WikiProcessors WikiProcessor]. 
    4  
    5 HTML support is built-in, and does not require installing any additional packages. 
    6  
    7 == How to Use HTML == 
     3Trac supports inserting HTML into any wiki context, accomplished using the `#!html` [wiki:WikiProcessors WikiProcessor].  
     4 
     5However a constraint is that this HTML has to be well-formed. 
     6In particular you can't insert a start tag in an `#!html` block, 
     7resume normal wiki text and insert the corresponding end tag in a  
     8second `#!html` block.  
     9 
     10Fortunately, for creating styled <div>s, <span>s  or even complex tables 
     11containing arbitrary Wiki text, there's a powerful alternative: use of 
     12dedicated `#!div`, `#!span` and `#!table`, `#!tr`, `#!td` and `#!th` blocks. 
     13 
     14Those Wiki processors are built-in, and does not require installing any additional packages. 
     15 
     16== How to use `#!html` == #HowtoUseHTML 
    817To inform the wiki engine that a block of text should be treated as HTML, use the ''html'' processor.  
    918 
    10 This example should explain: 
     19||= Wiki Markup =||= Display =|| 
     20{{{#!td 
     21  {{{ 
     22  {{{ 
     23  #!html 
     24  <h1 style="text-align: right; color: blue">HTML Test</h1> 
     25  }}} 
     26  }}} 
     27}}} 
     28{{{#!td style="padding-left: 2em" 
     29  {{{ 
     30  #!html 
     31  <h1 style="text-align: right; color: blue">HTML Test</h1> 
     32  }}} 
     33}}} 
     34 
     35Note that Trac sanitizes your HTML code before displaying it. That means that if you try to use potentially dangerous constructs such as Javascript event handlers, those will be removed from the output.  
     36 
     37Since 0.11, the filtering is done by Genshi, and as such, the produced output will be a well-formed fragment of HTML. As noted above in the introduction, this mean that you can no longer use two HTML blocks, one for opening a <div>, the second for closing it, in order to wrap arbitrary wiki text. 
     38The new way to wrap any wiki content inside a <div> is to use the `#!div` Wiki  processor. 
     39 
     40== How to use `#!div` and `#!span` == #HowtoUseDivSpan 
     41 
     42||= Wiki Markup =||= Display =|| 
     43{{{#!td 
     44  {{{ 
     45  {{{ 
     46  #!div class="important"  
     47  **important** is a predefined class. 
     48  }}} 
     49  }}} 
     50  {{{ 
     51  {{{ 
     52  #!div style="border: 1pt dotted; margin: 1em" 
     53  **wikipage** is another predefined class that will  
     54  be used when no class is specified. 
     55  }}} 
     56  }}} 
     57  {{{ 
     58  {{{ 
     59  #!div class="compact" style="border: 1pt dotted; margin: 1em" 
     60  **compact** is another predefined class reducing 
     61  the padding within the `<div>` to a minimum. 
     62  }}} 
     63  }}} 
     64  {{{ 
     65  {{{ 
     66  #!div class="wikipage compact" style="border: 1pt dotted" 
     67  Classes can be combined (here **wikipage** and **compact**) 
     68  which results in this case in reduced //vertical//  
     69  padding but there's still some horizontal space for coping 
     70  with headings. 
     71  }}} 
     72  }}} 
     73  {{{ 
     74  {{{ 
     75  #!div class="" style="border: 1pt dotted; margin: 1em" 
     76  Explicitly specifying no classes is //not// the same 
     77  as specifying no class attribute, as this will remove 
     78  the //wikipage// default class. 
     79  }}} 
     80  }}} 
     81}}} 
     82{{{#!td style="padding-left: 2em" 
     83 
     84  {{{ 
     85  #!div class="important"  
     86  **important** is a predefined class. 
     87  }}} 
     88 
     89  {{{ 
     90  #!div style="border: 1pt dotted; margin: 1em" 
     91  **wikipage** is another predefined class that will  
     92  be used when no class is specified. 
     93  }}} 
     94 
     95  {{{ 
     96  #!div class="compact" style="border: 1pt dotted; margin: 1em" 
     97  **compact** is another predefined class reducing 
     98  the padding within the `<div>` to a minimum. 
     99  }}} 
     100 
     101  {{{ 
     102  #!div class="wikipage compact" style="border: 1pt dotted" 
     103  Classes can be combined (here **wikipage** and **compact**) 
     104  which results in this case in reduced //vertical//  
     105  padding but there's still some horizontal space for coping 
     106  with headings. 
     107  }}} 
     108 
     109  {{{ 
     110  #!div class="" style="border: 1pt dotted; margin: 1em" 
     111  Explicitly specifying no classes is //not// the same 
     112  as specifying no class attribute, as this will remove 
     113  the //wikipage// default class. 
     114  }}} 
     115 
     116}}} 
     117 
     118Note that the contents of a `#!div` block are contained in one or more paragraphs, which have a non-zero top and bottom margin. This leads to the top and bottom padding in the example above. To remove the top and bottom margin of the contents, add the `compact` class to the `#!div`. Another predefined class besides `wikipage` and `compact` is `important`, which can be used to make a paragraph stand out. Extra CSS classes can be defined via the `site/style.css` file for example, see TracInterfaceCustomization#SiteAppearance. 
     119 
     120For spans, you should rather use the Macro call syntax: 
     121||= Wiki Markup =|| 
     122{{{#!td 
     123  {{{ 
     124  Hello  
     125  [[span(''WORLD'' (click [#anchor here]), style=color: green; font-size: 120%, id=anchor)]]! 
     126  }}} 
     127}}} 
     128|--------------------------------------------------------------------------------- 
     129||= Display =|| 
     130{{{#!td style="padding-left: 2em" 
     131  Hello 
     132  [[span(''WORLD'' (click [#anchor here]), style=color: green; font-size: 120%, id=anchor)]]! 
     133}}} 
     134 
     135== How to use `#!td` and other table related processors == #Tables 
     136 
     137`#!td` or `#!th` processors are actually the main ones, for creating table data and header cells, respectively. The other processors `#!table` and `#!tr` are not required for introducing a table structure, as `#!td` and `#!th` will do this automatically. The `|-` row separator can be used to start a new row when needed, but some may prefer to use a `#!tr` block for that, as this introduces a more formal grouping and offers the possibility to use an extra level of indentation. The main purpose of the `#!table` and `#!tr` is to give the possibility to specify HTML attributes, like ''style'' or ''valign'' to these elements. 
     138 
     139||= Wiki Markup =||= Display =|| 
     140{{{#!td 
     141 {{{ 
     142 Simple 2x2 table with rich content: 
     143 {{{#!th align=left 
     144  - Left 
     145  - Header 
     146 }}} 
     147 {{{#!th align=left 
     148  - Right 
     149  - Header 
     150 }}} 
     151 |---------------------------------- 
     152 {{{#!td style="background: #ffd" 
     153  - Left 
     154  - Content 
     155 }}} 
     156 {{{#!td style="vertical-align: top" 
     157 !RightContent 
     158 }}} 
     159 |---------------------------------- 
     160 || ... and this can be mixed||\ 
     161 ||with pipe-based cells || 
     162 {{{#!td colspan=2 
     163 Pick the style the more appropriate 
     164 to your content 
     165  
     166 See WikiFormatting#Tables for details 
     167 on the pipe-based table syntax. 
     168 }}} 
     169  
     170 If one needs to add some  
     171 attributes to the table itself... 
     172  
     173 {{{ 
     174 #!table style="border:none;text-align:center;margin:auto" 
     175   {{{#!tr ==================================== 
     176     {{{#!th style="border: none" 
     177     Left header 
     178     }}} 
     179     {{{#!th style="border: none" 
     180     Right header 
     181     }}} 
     182   }}} 
     183   {{{#!tr ==== style="border: 1px dotted grey" 
     184     {{{#!td style="border: none" 
     185     1.1 
     186     }}} 
     187     {{{#!td style="border: none" 
     188     1.2 
     189     }}} 
     190   }}} 
     191   {{{#!tr ==================================== 
     192     {{{#!td style="border: none" 
     193     2.1 
     194     }}} 
     195     {{{#!td 
     196     2.2 
     197     }}} 
     198   }}} 
     199 }}} 
     200 
     201 
     202 }}} 
     203}}} 
     204{{{#!td valign=top 
     205Simple 2x2 table with rich content: 
     206{{{#!th align=left 
     207 - Left 
     208 - Header 
     209}}} 
     210{{{#!th align=left 
     211 - Right 
     212 - Header 
     213}}} 
     214|---------------------------------- 
     215{{{#!td style="background: #ffd" 
     216 - Left 
     217 - Content 
     218}}} 
     219{{{#!td style="vertical-align: top" 
     220!RightContent 
     221}}} 
     222|---------------------------------- 
     223|| ... and this can be mixed||\ 
     224||with pipe-based cells || 
     225{{{#!td colspan=2 
     226Pick the style the more appropriate 
     227to your content 
     228 
     229See WikiFormatting#Tables for details 
     230on the pipe-based table syntax. 
     231}}} 
     232 
     233If one needs to add some  
     234attributes to the table itself... 
     235 
    11236{{{ 
    12 #!html 
    13 <pre class="wiki">{{{ 
    14 #!html 
    15 &lt;h1 style="text-align: right; color: blue"&gt;HTML Test&lt;/h1&gt; 
    16 }}}</pre> 
    17 }}} 
    18  
    19 Results in: 
    20 {{{ 
    21 #!html 
    22 <h1 style="text-align: right; color: blue">HTML Test</h1> 
    23 }}} 
    24  
    25 Note that Trac sanitizes your HTML code before displaying it. That means that if you try to use potentially dangerous constructs such as Javascript event handlers, those will be removed from the output. 
     237#!table style="border:none;text-align:center;margin:auto" 
     238  {{{#!tr ==================================== 
     239    {{{#!th style="border: none" 
     240    Left header 
     241    }}} 
     242    {{{#!th style="border: none" 
     243    Right header 
     244    }}} 
     245  }}} 
     246  {{{#!tr ==== style="border: 1px dotted grey" 
     247    {{{#!td style="border: none" 
     248    1.1 
     249    }}} 
     250    {{{#!td style="border: none" 
     251    1.2 
     252    }}} 
     253  }}} 
     254  {{{#!tr ==================================== 
     255    {{{#!td style="border: none" 
     256    2.1 
     257    }}} 
     258    {{{#!td 
     259    2.2 
     260    }}} 
     261  }}} 
     262}}} 
     263}}} 
     264 
     265Note that by default tables are assigned the "wiki" CSS class, which gives a distinctive look to the header cells and a default border to the table and cells (as can be seen for the tables on this page). By removing this class (`#!table class=""`), one regains complete control on the table presentation. In particular, neither the table, the rows nor the cells will have a border, so this is a more effective way to get such an effect than having to specify a `style="border: no"` parameter everywhere.  
     266 
     267{{{#!table class="" 
     268||= Wiki Markup =||= Display =|| 
     269 {{{#!td 
     270  {{{ 
     271  {{{#!table class="" 
     272  ||  0||  1||  2|| 
     273  || 10|| 20|| 30|| 
     274  || 11|| 22|| 33|| 
     275  ||||||=  numbers  =|| 
     276  }}} 
     277  }}} 
     278 }}} 
     279 {{{#!td 
     280  {{{#!table class="" 
     281  ||  0||  1||  2|| 
     282  || 10|| 20|| 30|| 
     283  || 11|| 22|| 33|| 
     284  ||||||=  numbers  =|| 
     285  }}} 
     286 }}} 
     287}}} 
     288 
     289Other classes can be specified as alternatives (remember that you can define your own in [TracInterfaceCustomization#SiteAppearance site/style.css]). 
     290 
     291||= Wiki Markup =||= Display =|| 
     292{{{#!td 
     293  {{{ 
     294  {{{#!table class="listing" 
     295  ||  0||  1||  2|| 
     296  || 10|| 20|| 30|| 
     297  || 11|| 22|| 33|| 
     298  ||||||=  numbers  =|| 
     299  }}} 
     300  }}} 
     301}}} 
     302{{{#!td 
     303  {{{#!table class="listing" 
     304  ||  0||  1||  2|| 
     305  || 10|| 20|| 30|| 
     306  || 11|| 22|| 33|| 
     307  ||||||=  numbers  =|| 
     308  }}} 
     309}}} 
     310 
     311 
     312== HTML comments == 
     313HTML comments are stripped from the output of the `html` processor. To add an HTML comment to a wiki page, use the `htmlcomment` processor (available since 0.12). For example, the following code block: 
     314||= Wiki Markup =|| 
     315{{{#!td 
     316  {{{ 
     317  {{{ 
     318  #!htmlcomment 
     319  This block is translated to an HTML comment. 
     320  It can contain <tags> and &entities; that will not be escaped in the output. 
     321  }}} 
     322  }}} 
     323}}} 
     324|--------------------------------------------------------------------------------- 
     325||= Display =|| 
     326{{{#!td 
     327  {{{ 
     328  <!-- 
     329  This block is translated to an HTML comment. 
     330  It can contain <tags> and &entities; that will not be escaped in the output. 
     331  --> 
     332  }}} 
     333}}} 
     334 
     335Please note that the character sequence "--" is not allowed in HTML comments, and will generate a rendering error. 
     336 
    26337 
    27338== More Information ==