Differences between revisions 7 and 8
Revision 7 as of 2005-05-15 15:57:05
Size: 3192
Comment:
Revision 8 as of 2009-09-20 23:27:52
Size: 3192
Editor: localhost
Comment: converted to 1.6 markup
No differences found!

Language Switching in Multilingual Publications

Some Background

Setting up languages in a Lenya publication

HTTP Content Negotiation

Language Switching Widgets

Lenya will start a session for each user and associate the language chosen with that session if it is not the default language. As long as the user is using the default language, all links inside the application are untouched and will contain just the document id, for example:

http://www.server.com/lenya/switchlanguage/authoring/subpage.html

Only if the user chooses to use a different language, all links in the page are automatically rewritten to point to specific language versions of the pages. If for example the user switches to Italian while englisch is the default language, the same link will read:

http://www.server.com/lenya/switchlanguage/authoring/subpage_it.html

Note that different language refers to the default language of the publication, not the preferred language sent my the user's browser.

Switching the language is as easy as linking to a document with a different target language. Lenya will recognise that the user is requesting a different language than the current one assiciated with the user's session and replace the browsing language with the new one. That's all.

Global Language Switching Widgets

If you want to place the famous "language flags" in a fixed place to allow the user to switch to a different language at any given point in time, you can put these controls into the XSL template. By using some variables, you make sure that these links will always be generated correctly.

A modified page2xhtml.xsl might read like this:

...
      <div id="page">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td id="publication-title">Welcome to the Default Publication!</td>
          <td id="project-logo"><img src="{$root}/images/project-logo.png"/></td>
        </tr>
      </table>

      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td>
            <a href="{$root}{$document-id}_de.html">DE</a>
          </td>
          <td>
            <a href="{$root}{$document-id}_en.html">EN</a>
          </td>
          <td>
            <a href="{$root}{$document-id}_it.html">IT</a>
          </td>
        </tr>
      </table>

      <xsl:apply-templates select="xhtml:div[@id = 'tabs']"/>
...

Note the <a> tags:

<a href="{$root}{$document-id}_de.html">DE</a>

That's all. It's that easy!

If you want to implement generic language links, you can use the publication-languages-csv attribute of the page envelope module:

<map:parameter name="languages" value="{page-envelope:publication-languages-csv}"/>

It returns a comma-separated list of the publication languages (de,en,it) which can be transformed to a set of links using a recursive template. Don't forget to disable the link to the current language version.

HowToLanguageSwitching (last edited 2009-09-20 23:27:52 by localhost)