5

With the guide on extending Emacs, I discovered the volatile highlights package.

But it only works on Emacs operations like kill and yank. I would like to use it with Evil operations like evil-yank evil-delete, and evil-paste-after.

I thought about advising those functions with defadvice, but that didn't work. Any other suggestions for getting it working with Evil?

  • 2
    Post the advice please. Maybe we can fix it. – PythonNut Jun 4 '15 at 23:39
  • I had the defadvice that calls the yank operation after the evil-yank, in order to trigger defadvice. But then it yanked two times, which was not the intention. – ReneFroger Jun 5 '15 at 15:21
  • 2
    Please just add the advice to the question. If you do, we can fix it (probably). If you don't we won't. – PythonNut Jun 9 '15 at 22:46
4
+100

Read the source code of volatile-highlights and you'll find you don't need advice at all, supporting any command is built into volatile-highlights. All you need is two lines of code:

(vhl/define-extension 'my-evil-highlights 'evil-yank 'evil-move 'some-other-functions ...)
(vhl/install-extension 'my-evil-highlights)

Read the docs for the two functions above for more info.

  • Error: [vhl] No load function for extension `vhl/use-my-evil-highlights-extension-p'. I'm not sure what to make of this. – PythonNut Jun 10 '15 at 2:35
  • 1
    Hmm. Works for me without errors (vhl/define-extension 'ut 'undo-tree-redo 'undo-tree-undo) (vhl/load-extension 'ut) – Tom Regner Jun 10 '15 at 8:25
  • Thanks for your answer, but it's not working in my case: pastebin.com/hUMDvEdM I looked up the commands that get called when press y or p or d in Evil, and added it to the list of my-evil-highlights. I don't get any error message, and I see no highlighting at all. Only when I do undo-operations. So I'm wondering what I'm missing here yet. – ReneFroger Jun 10 '15 at 15:41
  • 2
    The code in your paste works fine for me. I evaluated the two lines, enabled volatile-highlights-mode and then ran evil-paste-after and the pasted text was highlighted. – Jordon Biondo Jun 10 '15 at 16:14
  • 1
    After reading PythonNut answer, I tried it out. And yes, after running Emacs, you need to enable Volatile-highlights-mode, then it will run. Jordon, thanks for your answer. I have validated it. Congrats with your 5000 points! – ReneFroger Jun 14 '15 at 20:44

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