Add support for autocomplete users on admin permissions page

[chrisheller]

We have added support for doing autocompletion of the subject on the Trac admin permissions page.

Autocompleting the "Add Subject to Group" is relatively straightforward.

Autocompleting the "Grant Permission" is a little bit trickier because you may also be granting permissions to groups. For that, we added general support to optionally specify that the returned list should include groups and pass that along in the request for subjects when granting permissions.

The PermissionSystem component does not have direct support for just getting the list of groups, so SQL is done against the permission table to dig out the list, which is then also filtered by the search criteria. Any matching groups are then added to the end of the user list (as opposed to sorting them into the user list itself).

[chrisheller]

JavaScript for autocompletion on admin permission page

[chrisheller]

Modifications to autocompleteusers.py for autocompleting admin perms

[rjollos]

Changing ticket owner to be new maintainer.

[rjollos]

This has been implemented in mitar's branch ​a91a35e5f6f7 and will be pulled in shortly.

[rjollos]

#4832 closed as a duplicate.

[rjollos]

#4832 also requests autocomplete support for the Components admin panel (and provides a patch) and for the SvnAuthzAdminPlugin. For the latter, we should add generalized support for adding autocomplete to fields, specified through trac.ini options.

[rjollos]

There are a couple of potential issues with this patch:

• It assumes groups starts with an '@' character.
• The sg_group field is not autocompleted.

[rjollos]

(In [11730]) Refs #7324: Added support for autocompleting users and groups on the admin permissions page. Thanks to chrisheller for the initial patch.

[rjollos]

Code review and other feedback are welcome and appreciated. My development plan is:

• #6427 + #6444 + #7324 + #8477 (and possibly #4442) -> 0.4.2 (Trac 0.11+)
• #8438 + #9599 (and possibly #7605) -> 0.5 (Trac 0.12+)
• Make compatible with Trac 1.0 by using jQuery UI that ships with Trac, assuming that it has Autocomplete support bundled in. This would be similar to the work I'm doing for the DateFieldPlugin in #10107.

[rjollos]

Fix is in the current dev version of the trunk and will be released with version 0.4.2 of the plugin.