Changes between Version 2 and Version 3 of WikiHtml


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Timestamp:
Sep 22, 2010, 6:34:59 PM (14 years ago)
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trac
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  • WikiHtml

    v2 v3  
    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" style="border: 2pt solid; text-align: center"
     47  This is the ''only'' way to go in Trac 0.11
     48  }}}
     49
     50  {{{
     51  #!div class="wikipage" style="border: 1pt dotted"
     52  Only `wikipage` (same as specifying no class attribute)
     53  }}}
     54
     55  {{{
     56  #!div class="wikipage compact " style="border: 1pt solid"
     57  Use combined classes (`compact` and `wikipage`)
     58  }}}
     59
     60  {{{
     61  #!div class="compact" style="border: 1pt dotted"
     62  Only `compact`
     63  }}}
     64
     65  {{{
     66  #!div class="" style="border: 1pt solid"
     67  No classes (//not// the same as specifying no class attribute...)
     68  }}}
     69  }}}
     70}}}
     71{{{#!td style="padding-left: 2em"
     72  {{{
     73  #!div class="important" style="border: 2pt solid; text-align: center"
     74  This is the ''only'' way to go in Trac 0.11
     75  }}}
     76
     77  {{{
     78  #!div class="wikipage" style="border: 1pt dotted"
     79  Only `wikipage` (same as specifying no class attribute)
     80  }}}
     81
     82  {{{
     83  #!div class="wikipage compact " style="border: 1pt solid"
     84  Use combined classes (`compact` and `wikipage`)
     85  }}}
     86
     87  {{{
     88  #!div class="compact" style="border: 1pt dotted"
     89  Only compact
     90  }}}
     91
     92  {{{
     93  #!div class="" style="border: 1pt solid"
     94  No classes (//not// the same as specifying no class attribute...)
     95  }}}
     96}}}
     97
     98Note 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.
     99
     100For spans, you should rather use the Macro call syntax:
     101||= Wiki Markup =||
     102{{{#!td
     103  {{{
     104  Hello
     105  [[span(''WORLD'' (click [#anchor here]), style=color: green; font-size: 120%, id=anchor)]]!
     106  }}}
     107}}}
     108|---------------------------------------------------------------------------------
     109||= Display =||
     110{{{#!td style="padding-left: 2em"
     111  Hello
     112  [[span(''WORLD'' (click [#anchor here]), style=color: green; font-size: 120%, id=anchor)]]!
     113}}}
     114
     115== How to use `#!td` and other table related processors == #Tables
     116
     117`#!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.
     118
     119||= Wiki Markup =||= Display =||
     120{{{#!td
     121 {{{
     122 Simple 2x2 table with rich content:
     123 {{{#!th align=left
     124  - Left
     125  - Header
     126 }}}
     127 {{{#!th align=left
     128  - Right
     129  - Header
     130 }}}
     131 |----------------------------------
     132 {{{#!td style="background: #ffd"
     133  - Left
     134  - Content
     135 }}}
     136 {{{#!td style="vertical-align: top"
     137 !RightContent
     138 }}}
     139 |----------------------------------
     140 || ... and this can be mixed||\
     141 ||with pipe-based cells ||
     142 {{{#!td colspan=2
     143 Pick the style the more appropriate
     144 to your content
     145 
     146 See WikiFormatting#Tables for details
     147 on the pipe-based table syntax.
     148 }}}
     149 
     150 If one needs to add some
     151 attributes to the table itself...
     152 
     153 {{{
     154 #!table style="border:none;text-align:center;margin:auto"
     155   {{{#!tr ====================================
     156     {{{#!th style="border: none"
     157     Left header
     158     }}}
     159     {{{#!th style="border: none"
     160     Right header
     161     }}}
     162   }}}
     163   {{{#!tr ==== style="border: 1px dotted grey"
     164     {{{#!td style="border: none"
     165     1.1
     166     }}}
     167     {{{#!td style="border: none"
     168     1.2
     169     }}}
     170   }}}
     171   {{{#!tr ====================================
     172     {{{#!td style="border: none"
     173     2.1
     174     }}}
     175     {{{#!td
     176     2.2
     177     }}}
     178   }}}
     179 }}}
     180
     181
     182 }}}
     183}}}
     184{{{#!td valign=top
     185Simple 2x2 table with rich content:
     186{{{#!th align=left
     187 - Left
     188 - Header
     189}}}
     190{{{#!th align=left
     191 - Right
     192 - Header
     193}}}
     194|----------------------------------
     195{{{#!td style="background: #ffd"
     196 - Left
     197 - Content
     198}}}
     199{{{#!td style="vertical-align: top"
     200!RightContent
     201}}}
     202|----------------------------------
     203|| ... and this can be mixed||\
     204||with pipe-based cells ||
     205{{{#!td colspan=2
     206Pick the style the more appropriate
     207to your content
     208
     209See WikiFormatting#Tables for details
     210on the pipe-based table syntax.
     211}}}
     212
     213If one needs to add some
     214attributes to the table itself...
     215
    11216{{{
    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.
     217#!table style="border:none;text-align:center;margin:auto"
     218  {{{#!tr ====================================
     219    {{{#!th style="border: none"
     220    Left header
     221    }}}
     222    {{{#!th style="border: none"
     223    Right header
     224    }}}
     225  }}}
     226  {{{#!tr ==== style="border: 1px dotted grey"
     227    {{{#!td style="border: none"
     228    1.1
     229    }}}
     230    {{{#!td style="border: none"
     231    1.2
     232    }}}
     233  }}}
     234  {{{#!tr ====================================
     235    {{{#!td style="border: none"
     236    2.1
     237    }}}
     238    {{{#!td
     239    2.2
     240    }}}
     241  }}}
     242}}}
     243}}}
     244
     245Note 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.
     246
     247{{{#!table class=""
     248||= Wiki Markup =||= Display =||
     249 {{{#!td
     250  {{{
     251  {{{#!table class=""
     252  ||  0||  1||  2||
     253  || 10|| 20|| 30||
     254  || 11|| 22|| 33||
     255  ||||||=  numbers  =||
     256  }}}
     257  }}}
     258 }}}
     259 {{{#!td
     260  {{{#!table class=""
     261  ||  0||  1||  2||
     262  || 10|| 20|| 30||
     263  || 11|| 22|| 33||
     264  ||||||=  numbers  =||
     265  }}}
     266 }}}
     267}}}
     268
     269Other classes can be specified as alternatives (remember that you can define your own in [TracInterfaceCustomization#SiteAppearance site/style.css]).
     270
     271||= Wiki Markup =||= Display =||
     272{{{#!td
     273  {{{
     274  {{{#!table class="listing"
     275  ||  0||  1||  2||
     276  || 10|| 20|| 30||
     277  || 11|| 22|| 33||
     278  ||||||=  numbers  =||
     279  }}}
     280  }}}
     281}}}
     282{{{#!td
     283  {{{#!table class="listing"
     284  ||  0||  1||  2||
     285  || 10|| 20|| 30||
     286  || 11|| 22|| 33||
     287  ||||||=  numbers  =||
     288  }}}
     289}}}
     290
     291
     292== HTML comments ==
     293HTML 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:
     294||= Wiki Markup =||
     295{{{#!td
     296  {{{
     297  {{{
     298  #!htmlcomment
     299  This block is translated to an HTML comment.
     300  It can contain <tags> and &entities; that will not be escaped in the output.
     301  }}}
     302  }}}
     303}}}
     304|---------------------------------------------------------------------------------
     305||= Display =||
     306{{{#!td
     307  {{{
     308  <!--
     309  This block is translated to an HTML comment.
     310  It can contain <tags> and &entities; that will not be escaped in the output.
     311  -->
     312  }}}
     313}}}
     314
     315Please note that the character sequence "--" is not allowed in HTML comments, and will generate a rendering error.
     316
    26317
    27318== More Information ==