[BZ#644910] Compare archive files (tar.gz or zip)

Submitted by say..@..com

Description

Sometimes you're editing files inside an archive (for example, OpenOffice files are zipped archives of XML files) and you want to compare the files inside. You could unarchive the files, compare the directories, and rearchive as necessary. But if you want to make quick changes and test their effects, this adds a lot of time. It would be nice for meld to be able to access the files in the archive without unarchiving first.

This might be easy to implement using GVFS.

In terms of user interface, in the "Compare directory" dialog you could select a "Directory, or archive containing a directory".