In Emacs how to prevent the same buffer from showing up in different windows in the same frame?

Question

I'm not sure how to comprehensively accomplish this.

Currently I build my own bzr Emacs on Windows, so I can see that `display-buffer' now takes a SPECIFIERS option, which could be interesting, but I couldn't find concrete examples of how to use it.

But this problem really has to be solved before display-buffer is called.

For example a Help window previously was visiting Buffer-A, but I've visited Buffer-A in another window while reading the help. Now when I quit the Help window, Buffer-A appears there as well. I want some other useful buffer to appear there.

Answer 1

I have some experimental code that appears to work here.

I emphasize experimental. This could melt your Emacs.

I'd appreciate it if you could contact me on github or here to let me know your experiences with this.