Evil Numbers

Features

• Increment / Decrement binary, octal, decimal and hex literals.
• Works like C-a / C-x in VIM, i.e. searches for number up to eol and then increments or decrements.
• When a region is active, as in evil’s visual mode, all the numbers within that region will be incremented/decremented (unlike in VIM).
• Increment/decrement numbers incrementally like g C-a / g C-x in VIM.
• Optionally keep zero padding (off by default).

Detected Literals

• Binary, e.g. 0b0101, 0B0101.
• Octal, e.g. 0o755, 0O700.
• Hexadecimal, e.g. 0xDEADBEEF, 0XCAFE.
• Unicode superscript and subscript, e.g. ² and ₁.

Usage

Once this package is installed, all you need to do is bind keys to evil-numbers/inc-at-pt and evil-numbers/dec-at-pt.

Position cursor over or before the literal and play with your numbers!

You may also want to bind keys to the incremental versions of these functions.

Customization

evil-numbers-pad-default

Set to t if you want numbers to be padded with zeros (numbers with a leading zero are always padded). If you want both behaviors, all commands take an optional argument padded.

evil-numbers-separator-chars

This option to support separator characters, set to “_” or “,” to support numeric literals such as: 16_777_216 or 4,294,967,296.

You may wish to set this as a buffer local variable to enable this only for languages that support separators.

evil-numbers-case

The case to use for hexadecimal numbers.

• nil Current case (default).
• ‘upcase Always upper case.
• ‘downcase Always lower case.

evil-numbers-use-cursor-at-end-of-number

Support matching numbers directly before the cursor.

This is off by default as it doesn’t follow VIM’s behavior.

Key Bindings

Example key bindings:

(global-set-key (kbd "C-c +") 'evil-numbers/inc-at-pt)
(global-set-key (kbd "C-c -") 'evil-numbers/dec-at-pt)
(global-set-key (kbd "C-c C-+") 'evil-numbers/inc-at-pt-incremental)
(global-set-key (kbd "C-c C--") 'evil-numbers/dec-at-pt-incremental)

or only in evil’s normal & visual states:

(evil-define-key '(normal visual) 'global (kbd "C-c +") 'evil-numbers/inc-at-pt)
(evil-define-key '(normal visual) 'global (kbd "C-c -") 'evil-numbers/dec-at-pt)
(evil-define-key '(normal visual) 'global (kbd "C-c C-+") 'evil-numbers/inc-at-pt-incremental)
(evil-define-key '(normal visual) 'global (kbd "C-c C--") 'evil-numbers/dec-at-pt-incremental)

Keypad + and - present an alternative that can be directly bound without shadowing the regular + and -:

(evil-define-key '(normal visual) 'global (kbd "<kp-add>") 'evil-numbers/inc-at-pt)
(evil-define-key '(normal visual) 'global (kbd "<kp-subtract>") 'evil-numbers/dec-at-pt)
(evil-define-key '(normal visual) 'global (kbd "C-<kp-add>") 'evil-numbers/inc-at-pt-incremental)
(evil-define-key '(normal visual) 'global (kbd "C-<kp-subtract>") 'evil-numbers/dec-at-pt-incremental)

Install

Basic Installation

Put in load-path, (require 'evil-numbers) and set key bindings.

Use Package

Assuming you have the melpa repository enabled, use-package can be used as follows.

(use-package evil-numbers)

Known Bugs

See http://github.com/juliapath/evil-numbers/issues

Similar Packages

• Mouse Slider Package
• Number Package
• Shift Number Package
• Emacs Wiki (Increment Number)

Contributors

• Matthew Fidler <matthew.fidler@gmail.com>
• Michael Markert <markert.michael@gmail.com>
• Julia Path <julia@jpath.de>
• Campbell Barton <ideasman42@gmail.com>