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So in ediff I can press m to widen the frame but if I quit before pressing it again to restore to the original size, then the frame stays that size. I'd like to automate this so that if I forgot to press m before quitting ediff, it will "press" m for me.
I found some elisp that claims to do this:
(add-hook 'ediff-cleanup-hook
(lambda () (if ediff-wide-display-p 'ediff-toggle-wide-display)))
However, it doesn't seem to be having any effect. Can this be done after all?
kovrik on IRC provided me with something that works:
(defun my-toggle-ediff-wide-display ()
"Turn off wide-display mode (if was enabled) before quitting ediff."
(when ediff-wide-display-p
(ediff-toggle-wide-display)))
(add-hook 'ediff-cleanup-hook 'my-toggle-ediff-wide-display)
I'm new to elisp, can someone tell me why this works and not what I had? I imagine it has to do with ediff-wide-display-p having a different value when I use it in a lambda, or something to do with a buffer local variable or whatever.
'ediff-toggle-wide-display instead of (ediff-toggle-wide-display). In the add-hook example in the answer above, 'my-toggle-ediff-wide-display is being passed as an argument to add-hook in the form of a symbol.