== Theme Subset ==

For several reasons, it may sometimes be useful to limit users to a choice of a subset of all the installed themes.

  * Testing a newly developed or downloaded contributed theme.
  * Sub-classing a theme to implement minor changes so it is easy to install updates made to the base theme.

This feature will allow wiki maintainers to restrict most users to a subset of installed themes by adding an entry to the wiki configuration file.  User IDs listed in the `superuser` configuration parameter will have access to all installed themes.  (An alternative is to implement another list of privileged users such as `theme_testers = ['UserOne','UserTwo']`.)

Add a new parameter to multiconfig.py that will negate the feature:

{{{
    theme_list = []
}}}

Near line 426 in userform.py of Moin 1.5.8 replace the lines:
{{{
        for theme in wikiutil.getPlugins('theme', self.request.cfg):
            options.append((theme, theme))
}}}
with:
{{{
        if self.cfg.theme_list and self.request.user.name not in self.cfg.superuser:
            theme_list  = self.cfg.theme_list
        else:
            theme_list = wikiutil.getPlugins('theme', self.request.cfg)
        for theme in theme_list:
            options.append((theme, theme))
}}}

Wiki maintainers wishing to implement the feature would add something like the following to wikiconfig.py:
{{{
    theme_list = ['mytheme1','mytheme2']
}}}

Documentation for HelpOnConfiguration:
||Variable Name||Default||Description||
||theme_list||[]||List of themes for the Preferred Theme drop-down box on the User Preferences page.  Users in superuser are not affected.||

Note that implementation of this feature could eliminate the need for the `theme_force` configuration parameter.  Setting `theme_list` to one theme that is the same as `theme-default` effectively does the same thing.

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CategoryFeatureRequest