Good Rails Editor Linux?

One thing I tend to take for granted when using TextMate is the idea of the “Project” and the ensuing ability to search through an entire site easily. Drag a folder onto TextMate and *poof*, fully-searchable project. I often locate a file that needs to be worked on by searching for a chunk of text in the file rather than remembering which file contains the text.

Can anyone recommend a good graphical editor for Linux that affords the same functionality? (Let’s just assume that all the vim/vi/emacs suggestions have already been made and move past that, shall we? I’m not interested in accommodating the learning curve just to edit some HTML files locally.)