Smart Shift

Smart Shift is a minor mode for conveniently shift the line/region to the left/right by the current major mode indentation width or shift line/region backwardly/forwardly by lines.

Installation

Melpa

Once you have setup Melpa you can use package-install command to install. The package name is smart-shift.

Manual

(add-to-list 'load-path "/path/to/smart-shift")
(require 'smart-shift)
(global-smart-shift-mode 1)

Customizing

Smart Shift will infer the indentation level of current major mode, if none of major modes listed below match, use the tab-width as default.

It can also be set to a number explictly.

(setq smart-shift-indentation-level 2)

Or, for some major mode we haven't support, add following snippets to your config file. Test it and send a PR.

(eval-after-load 'your-major-mode
  '(progn
     (add-to-list 'smart-shift-mode-alist
                  '(major-mode-or-derived-mode . customize-base-offset))))

Supported major modes

• lisp-mode
• emacs-lisp-mode
• c-mode
• c++-mode
• objc-mode
• java-mode
• idl-mode
• pike-mode
• awk-mode
• ruby-mode
• python-mode
• swift-mode
• js-mode
• js2-mode
• coffee-mode
• css-mode
• scss-mode
• slim-mode
• html-mode
• web-mode
• sh-mode
• yaml-mode
• text-mode
• markdown-mode
• fundamental-mode

Interactive commands

Command	Keybinding	Description
smart-shift-left	C-C <left>	Shift the line or region ARG times to the left.
smart-shift-right	C-C <right>	Shift the line or region ARG times to the right.
smart-shift-up	C-C <up>	Shift the line or region ARG lines backwardly.
smart-shift-down	C-C <down>	Shift the line or region ARG lines forwardly.

After invoking smart-shift-<arrow> the first time, you can simply hit the <arrow> key to continuously shift, respectively.

If you use the key-chord like me. I strongly recommend you add the following snippets:

(key-chord-define-global "<<" 'smart-shift-left)
(key-chord-define-global ">>" 'smart-shift-right)

Contribute

Forks and pull requests are welcome!