Changes between Initial Version and Version 1 of WikiHtml

Timestamp:

Oct 11, 2018, 8:57:56 AM (6 years ago)

Author:

trac

Comment:

--

WikiHtml

@@ +1 @@
+= Using HTML in Wiki Text =
+
+Trac supports the display of HTML in any wiki context, by using the `#!html` [wiki:WikiProcessors WikiProcessor]. 
+
+However, this HTML has to be [http://en.wikipedia.org/wiki/Well-formed_element well-formed].
+In particular, you can't insert a start tag in an `#!html` block, resume normal wiki text and insert the corresponding end tag in a second `#!html` block. 
+
+Fortunately, for creating styled <div>s, <span>s  or even complex tables containing arbitrary Wiki text, there is a powerful alternative: `#!div`, `#!span` and `#!table`, `#!tr`, `#!td` and `#!th` blocks. Those Wiki processors are built-in and do not require additional packages to be installed.
+
+== How to use `#!html` == #HowtoUseHTML
+To inform the wiki engine that a block of text should be treated as HTML, use the ''html'' processor:
+
+||= Wiki Markup =||= Display =||
+{{{#!td
+  {{{
+  {{{
+  #!html
+  <h1 style="text-align: right; color: blue">HTML Test</h1>
+  }}}
+  }}}
+}}}
+{{{#!td style="padding-left: 2em"
+  {{{
+  #!html
+  <h1 style="text-align: right; color: blue">HTML Test</h1>
+  }}}
+}}}
+
+Note that Trac sanitizes your HTML code before displaying it. That means that potentially dangerous constructs, such as Javascript event handlers, will be removed from the output. 
+
+The filtering is done by [http://genshi.edgewall.org/ Genshi] and the output will be a well-formed fragment of HTML. This means that you can no longer use two HTML blocks, one for opening a <div> and another for closing it, in order to wrap arbitrary wiki text.
+The new way to wrap any wiki content inside a <div> is to use the `#!div` Wiki processor.
+
+== How to use `#!div` and `#!span` == #HowtoUseDivSpan
+
+||= Wiki Markup =||= Display =||
+{{{#!td
+  {{{
+  {{{
+  #!div class="important" 
+  **important** is a predefined class.
+  }}}
+  }}}
+  {{{
+  {{{
+  #!div style="border: 1pt dotted; margin: 1em"
+  **wikipage** is another predefined class that will 
+  be used when no class is specified.
+  }}}
+  }}}
+  {{{
+  {{{
+  #!div class="compact" style="border: 1pt dotted; margin: 1em"
+  **compact** is another predefined class reducing
+  the padding within the `<div>` to a minimum.
+  }}}
+  }}}
+  {{{
+  {{{
+  #!div class="wikipage compact" style="border: 1pt dotted"
+  Classes can be combined (here **wikipage** and **compact**)
+  which results in this case in reduced //vertical// 
+  padding but there's still some horizontal space for coping
+  with headings.
+  }}}
+  }}}
+  {{{
+  {{{
+  #!div class="" style="border: 1pt dotted; margin: 1em"
+  Explicitly specifying no classes is //not// the same
+  as specifying no class attribute, as this will remove
+  the //wikipage// default class.
+  }}}
+  }}}
+}}}
+{{{#!td style="padding-left: 2em"
+
+  {{{
+  #!div class="important" 
+  **important** is a predefined class.
+  }}}
+
+  {{{
+  #!div style="border: 1pt dotted; margin: 1em"
+  **wikipage** is another predefined class that will 
+  be used when no class is specified.
+  }}}
+
+  {{{
+  #!div class="compact" style="border: 1pt dotted; margin: 1em"
+  **compact** is another predefined class reducing
+  the padding within the `<div>` to a minimum.
+  }}}
+
+  {{{
+  #!div class="wikipage compact" style="border: 1pt dotted"
+  Classes can be combined (here **wikipage** and **compact**)
+  which results in this case in reduced //vertical// 
+  padding but there's still some horizontal space for coping
+  with headings.
+  }}}
+
+  {{{
+  #!div class="" style="border: 1pt dotted; margin: 1em"
+  Explicitly specifying no classes is //not// the same
+  as specifying no class attribute, as this will remove
+  the //wikipage// default class.
+  }}}
+
+}}}
+
+Note 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 content, 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.
+
+For spans, you should use the Macro call syntax:
+||= Wiki Markup =||
+{{{#!td
+  {{{
+  Hello 
+  [[span(''WORLD'' (click [#anchor here]), style=color: green; font-size: 120%, id=anchor)]]!
+  }}}
+}}}
+|---------------------------------------------------------------------------------
+||= Display =||
+{{{#!td style="padding-left: 2em"
+  Hello
+  [[span(''WORLD'' (click [#anchor here]), style=color: green; font-size: 120%, id=anchor)]]!
+}}}
+
+== How to use `#!td` and other table related processors == #Tables
+
+The `#!td` or `#!th` processors should be used to create table data and table 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.
+
+||= Wiki Markup =||= Display =||
+{{{#!td
+ {{{
+ Simple 2x2 table with rich content:
+ {{{#!th align=left
+  - Left
+  - Header
+ }}}
+ {{{#!th align=left
+  - Right
+  - Header
+ }}}
+ |----------------------------------
+ {{{#!td style="background: #ffd"
+  - Left
+  - Content
+ }}}
+ {{{#!td style="vertical-align: top"
+ !RightContent
+ }}}
+ |----------------------------------
+ || ... and this can be mixed||\
+ ||with pipe-based cells ||
+ {{{#!td colspan=2
+ Pick the style the more appropriate
+ to your content
+ 
+ See WikiFormatting#Tables for details
+ on the pipe-based table syntax.
+ }}}
+ 
+ If one needs to add some 
+ attributes to the table itself...
+ 
+ {{{
+ #!table style="border:none;text-align:center;margin:auto"
+   {{{#!tr ====================================
+     {{{#!th style="border: none"
+     Left header
+     }}}
+     {{{#!th style="border: none"
+     Right header
+     }}}
+   }}}
+   {{{#!tr ==== style="border: 1px dotted grey"
+     {{{#!td style="border: none"
+     1.1
+     }}}
+     {{{#!td style="border: none"
+     1.2
+     }}}
+   }}}
+   {{{#!tr ====================================
+     {{{#!td style="border: none"
+     2.1
+     }}}
+     {{{#!td
+     2.2
+     }}}
+   }}}
+ }}}
+
+
+ }}}
+}}}
+{{{#!td valign=top
+Simple 2x2 table with rich content:
+{{{#!th align=left
+ - Left
+ - Header
+}}}
+{{{#!th align=left
+ - Right
+ - Header
+}}}
+|----------------------------------
+{{{#!td style="background: #ffd"
+ - Left
+ - Content
+}}}
+{{{#!td style="vertical-align: top"
+!RightContent
+}}}
+|----------------------------------
+|| ... and this can be mixed||\
+||with pipe-based cells ||
+{{{#!td colspan=2
+Pick the style the more appropriate
+to your content
+
+See WikiFormatting#Tables for details
+on the pipe-based table syntax.
+}}}
+
+If one needs to add some 
+attributes to the table itself...
+
+{{{
+#!table style="border:none;text-align:center;margin:auto"
+  {{{#!tr ====================================
+    {{{#!th style="border: none"
+    Left header
+    }}}
+    {{{#!th style="border: none"
+    Right header
+    }}}
+  }}}
+  {{{#!tr ==== style="border: 1px dotted grey"
+    {{{#!td style="border: none"
+    1.1
+    }}}
+    {{{#!td style="border: none"
+    1.2
+    }}}
+  }}}
+  {{{#!tr ====================================
+    {{{#!td style="border: none"
+    2.1
+    }}}
+    {{{#!td
+    2.2
+    }}}
+  }}}
+}}}
+}}}
+
+Note 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 nor the rows nor the cells will have a border, so this is a more effective way to get such an effect rather than having to specify a `style="border: no"` parameter everywhere. 
+
+{{{#!table class=""
+||= Wiki Markup =||= Display =||
+ {{{#!td
+  {{{
+  {{{#!table class=""
+  ||  0||  1||  2||
+  || 10|| 20|| 30||
+  || 11|| 22|| 33||
+  ||||||=  numbers  =||
+  }}}
+  }}}
+ }}}
+ {{{#!td
+  {{{#!table class=""
+  ||  0||  1||  2||
+  || 10|| 20|| 30||
+  || 11|| 22|| 33||
+  ||||||=  numbers  =||
+  }}}
+ }}}
+}}}
+
+Other classes can be specified as alternatives (remember that you can define your own in [TracInterfaceCustomization#SiteAppearance site/style.css]).
+
+||= Wiki Markup =||= Display =||
+{{{#!td
+  {{{
+  {{{#!table class="listing"
+  ||  0||  1||  2||
+  || 10|| 20|| 30||
+  || 11|| 22|| 33||
+  ||||||=  numbers  =||
+  }}}
+  }}}
+}}}
+{{{#!td
+  {{{#!table class="listing"
+  ||  0||  1||  2||
+  || 10|| 20|| 30||
+  || 11|| 22|| 33||
+  ||||||=  numbers  =||
+  }}}
+}}}
+
+== HTML comments ==
+HTML 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 Trac 0.12:
+||= Wiki Markup =||
+{{{#!td
+  {{{
+  {{{
+  #!htmlcomment
+  This block is translated to an HTML comment.
+  It can contain <tags> and &entities; that will not be escaped in the output.
+  }}}
+  }}}
+}}}
+|---------------------------------------------------------------------------------
+||= Display =||
+{{{#!td
+  {{{
+  <!--
+  This block is translated to an HTML comment.
+  It can contain <tags> and &entities; that will not be escaped in the output.
+  -->
+  }}}
+}}}
+
+Please note that the character sequence "`--`" is not allowed in HTML comments, and will generate a rendering error.
+
+
+== More Information ==
+
+ * http://www.w3.org/ -- World Wide Web Consortium
+ * http://www.w3.org/MarkUp/ -- HTML Markup Home Page
+
+----
+See also:  WikiProcessors, WikiFormatting, WikiRestructuredText