dmitry added on 2011-01-20 14:01:59 UTC:
Here are some thoughts on implementation.

• Have "can edit on web" permission flag.
• Have special per-user staging area for edits from web, which records modifications to files.
• Once file(s) are edited, they're put into the user's staging area.
• User can commit his staging area if he has commit permission.
• Users without commit permissions, but with "can edit on web" permissions, can create tickets with modifications from their staging area or download their modifications as a patch.

This won't work for anonymous or other "group" users. For those Fossil can have per-file editing without staging area. Also, not sure how to handle merges.

Closing as part of periodic cleanup.