hrehfeld / Emacs Smart Hungry Delete

• Smart-hungry-delete

Delete whitespace between words, parenthesis and other delimiters in a smart (dumb) way.

Suppose you have this text in the buffer:

[[./doc/demo-00-01.png]]

With =smart-hungry-delete/backward-char=, it will delete all but one (white-)space between =word= and =paren=:

[[./doc/demo-00-02.png]]

If you delete here:

[[./doc/demo-00-03.png]]

it deletes all whitespace, because it's on the inside of a paren:

[[./doc/demo-00-04.png]]

Inside of right paren:

[[./doc/demo-00-05.png]]

[[./doc/demo-00-06.png]]

This is configured for =C=-like languages (e.g. Python), where =:= usually has no space to the left:

[[./doc/demo-00-07.png]]

[[./doc/demo-00-08.png]]

It has space to the right though:

[[./doc/demo-00-09.png]]

[[./doc/demo-00-10.png]]

This also works for (nested) parentheses:

[[./doc/demo-00-11.png]]

[[./doc/demo-00-12.png]]

[[./doc/demo-00-13.png]]

Between words it will leave a space:

[[./doc/demo-00-14.png]]

[[./doc/demo-00-15.png]]

[[./doc/demo-00-16.png]]

Here's a small demonstration video:

#+begin_html #+end_html

• Installing

It's in [[https://melpa.org][MELPA]], so if you have that in your package lists, just =M-x= =package-install= =smart-hungry-delete=, and bind =smart-hungry-delete-backward-char= and =smart-hungry-delete-forward-char=: #+begin_src elisp (require 'smart-hungry-delete) (smart-hungry-delete-add-default-hooks) (global-set-key (kbd "") 'smart-hungry-delete-backward-char) (global-set-key (kbd "C-d") 'smart-hungry-delete-forward-char) #+end_src

If you use =use-package=: #+begin_src elisp (use-package smart-hungry-delete :ensure t :bind (("" . smart-hungry-delete-backward-char) ("C-d" . smart-hungry-delete-forward-char)) :defer nil ;; dont defer so we can add our functions to hooks :config (smart-hungry-delete-add-default-hooks) ) #+end_src

Here's the basic el-get recipe:

#+begin_src elisp (:name smart-hungry-delete :type github :pkgname "hrehfeld/emacs-smart-hungry-delete") #+end_src elisp

• Configuration

smart-hungry-delete deletes hungrily if three regexps match:

#+begin_src (point) #+end_src

or with =smart-hungry-delete-forward-char=:

#+begin_src (point) #+end_src

You can configure these on a per buffer basis:

=smart-hungry-delete-char-kill-regexp= is a buffer-local variable holding a regex that defines what will be hungrily deleted ().

=smart-hungry-delete-char-trigger-killall-regexps= is a list of pairs:

#+begin_src elisp '(("\[" . ".") ;; delete when is "[" and is any of "." ("." . "\]") ;; delete when is any of "." and is "]" ...) #+end_src

=smart-hungry-delete-add-regexps-left-right= makes it easy to add left-right combinations of chars like parentheses:

#+begin_src elisp (smart-hungry-delete-add-regexps-left-right "\{" "\}") ;;as above, but with "{" and "}" #+end_src

=smart-hungry-delete-add-default-hooks= will add some good defaults for (some) programming modes. Check out the =smart-hungry-delete-default-*-hook= functions.

If you have good suggestions for more defaults, make sure to [[https://github.com/hrehfeld/emacs-smart-hungry-delete/issues][suggest the recipes!]]