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Making a command undoable
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Raffaele Ricciardi
Aug 31, 2012, 1:16:48 PM8/31/12
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Hello,
you have written a command and you want to make it undoable by using
`undo'. How do you accomplish that?
Thanks.
you have written a command and you want to make it undoable by using
`undo'. How do you accomplish that?
Thanks.
Doug Lewan
Aug 31, 2012, 1:57:30 PM8/31/12
to Raffaele Ricciardi, help-gn...@gnu.org
The elisp info documentation (section 32.9 in emacs 24) tells you what kind of information you have to keep track of and how to do so.
I've also noticed that you very often get "undo" for free if your command make changes in "normal" ways. I assume that "the unit to undo" is a single M-x CMD, but I've never researched this.
,Doug
I've also noticed that you very often get "undo" for free if your command make changes in "normal" ways. I assume that "the unit to undo" is a single M-x CMD, but I've never researched this.
,Doug
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