How to set the Emacs title bar like "plugin.el@~/.emacs.d/plugin/"

Question

I wanna to set my title bar like plugin.el@~/.emacs.d/plugin/ , the plugin.el file is in the plugin directory, I googled a lot, no result just is like what I need.

1. the order of file name and directory name
2. change /home/username to ~ if the file is in my home directory
3. the string after @ is just directory name without the file name

Please help...

Answer 1

Set frame-title-format to something like (:eval (let ((b (buffer-file-name))) (format "%s@%s" (file-name-nondirectory b) (file-name-directory b)))).

Maybe what you are actually looking for is a different uniquification policy, though. This will affect the mode line, the actual buffer names, and (in many standard configurations) the frame title.