Version 7 (modified by Shun-ichi Goto, 10 years ago) (diff)

Add notice for users to enable new component.

Content negotiation plugin for Trac wiki


This plugin provides content negotiation mechanism for Trac wiki pages. With this plugin, your trac site can provides localized pages for users.

A live example site is here.

Bugs/Feature Requests

Existing bugs and feature requests for TracWikiNegotiatorPlugin are here.

If you have any issues, create a new ticket.


Download the zipped source from [download:tracwikinegotiatorplugin here].


You can check out TracWikiNegotiatorPlugin from here using Subversion, or browse the source with Trac.


Build egg file and place it appropriate place

If you want to install as system wide plugin:

$ python install

If you want to build plugin egg file and use it in some projects, build egg file and copy it into plugins directory under the trac environment directory:

$ python bdist_egg
$ cp dist/*.egg /your/trac/project/plugins

How to Setup

On using this plugin, do not forget enabling plugin WikiNegotiator in trac.ini or via WebAdmin page.

wikinegotiator.* = enabled

default_lang = en

Note that TitleIndex macro and TOC macro (by tractoc plugin) is overridden by enabling this plugin. To use original macro, you should disable new macro explicitly. See Bonus Macro for more detail.

How to Use

Using the negotiation feature is simply providing suffixed page like 'Foo.ja' for Japanese, '' for French, so on. When Japanese user (with Japanese setting in browser) access to the page 'Foo', he will see the content of Foo.ja instead of Foo. Likewise, French use will see the content of So what you should to do is creating localized page content as usual way. Note that suffix like '.ja' and '.fr' is to be a standard language code.

Non-suffixed page Foo is also usable for default content when no suffixed page is matched to user's request.

To see the page for your language, nothing to do to view localized page. To see the page for other language, specify the appropreate suffix for wiki page name in url explicitly, or add query parameter like "?lang=xx".

To edit the page, you can edit the page now you are seeing by simply press "Edit" button. To edit the page for other language, first, visit the desired page with a way described above, then press "Edit" button.

Language Menu

By using this plugin, you can see new language menu bar above the wiki context navigation menu. It displays available languages on this site automatically by finding language suffixes of wiki pages.

Notice: Users who installed earlier version (before r4974) on trac 0.11 may need enabling WikiNegotiatorMenuBar component to display language menu.

You can select language via this menu. Because it is holded in the session information, you can walk with the language without re-selection.

The selected language are displayed underlined and bolded on the menu. If specific language content is not availabe, the language item in the menu is grayed.

There are 5 kind of display styles:

Solid menu bar above the wiki context navigation menu. This is default style.
Like simple but displayed on the right of the wiki context menu. It looks like a one of the context menu item.
Button faced selection menu.
Tabbed page style of selector.
Hide language menu.

The style of language menu can be changed by menu_style option:


Bonus Macro

For bonus, this plugin contains two new macro: MultiLangTitleIndex and NTOC. The former is an alternative macro of TitleIndex. The later is an alternative of TOC macro. (see tocmacro in Trac-Hacs for more detail)

And this plugin has the definitions to override original TitleIndexMacro and TOCMacro automatically. So you do not need to edit wiki pages to use both two new macros. If you want to disable new feature and use original, disable new macros explicitly in trac.ini like this:

wikinegotiator.macros.titleindexmacro = disabled
wikinegotiator.macros.tocmacro = disabled


The differences against TitleIndex are:

  • Display in one line for variants like: "* WikiStart (ja, en, other)".
  • List pages in two columns: one is for user's pages, one is for system provided pages. System pages are the pages made by trac. WikiStart and SandBox are exception by default because it is a page to be edited by user.

It is useful for the site having many localized pages.

This feature is automatically enabled by overriding TitleIndexMacro when this plugin is enabled.


NTOC macro delives TOC macro, so all the features in TOC macro are available except handling lang suffixed pages. If you specify normal page name without explicit lang suffix (i.e. WikiStart), NTOC look up localized page for language same to parent page the macro is put on. If not exist, look up localized page for preferred langs. If not found, use specified name as is. So, it is easy to get localized TOC by simply specifyng base page names in argument.

NTOC also handles wildcard page argument by expanding and removing suffixed pages.

This feature is automatically enabled by overriding TOCMacro if available when this plugin is enabled.

Recent Changes

10723 by gotoh on 2011-10-03 11:26:54
Refresh existing languages on adding/deleting/renaming page.
10722 by gotoh on 2011-10-03 11:26:45
Do not remember temporary lang.
10718 by gotoh on 2011-10-03 09:19:52
Ignore invalid lang value for security reason.

We should reject lang value which does not have expected format ("xx"
or "xx-yy").



Author: gotoh