Window numbers for Emacs !

• Contents
• Introduction
• Installation
• How to use
• Configuration
  • Custom keymap
  • Customize options
  • Configuration file example

Contents   TOC

• Introduction
• Installation
• How to use

• Configuration

  • Custom keymap
  • Customize options
  • Configuration file example

Introduction

Window numbers for Emacs: Navigate your windows and frames using numbers !

This package is an extended and actively maintained version of the https://github.com/nschum/window-numbering.el package by Nikolaj Schumacher, with some ideas and code taken from https://github.com/abo-abo/ace-window.

This version brings, among other things, support for number sets across multiple frames, giving the user a smoother experience of multi-screen Emacs.

Installation

• Clone the repo:

  cd /path/to/install/folder
  git clone https://github.com/deb0ch/winum.el

• Add the following to your Emacs configuration:

  (add-to-list 'load-path "/path/to/install/folder/winum.el/")

  (require 'winum)

  (winum-mode)

How to use

• select-window-[0..9] Use M-1 to M-9 to navigate windows numbered 1 to 9. By default, M-0 is bound to select-window-0-or-10, which behaves like the other ones except that if 0 is not assigned it will act on the window 10 instead. You can rebind this to the more straightforward select-window-0 if you prefer.

• select-window-by-number

  If you happen to have more than 10 windows, you can use the select-window-by-number function, bound by default to C-`.

  This function allows several ways to input the window number:

  • Use a numbered prefix argument.
    Ex: C-1 C-2 C` to select window 12.
  • Use a negative prefix argument to delete the window.
    Ex: C-- C-1 C-2 C` to delete window 12.
  • Use the negative prefix argument to delete window 0.
    Ex: C-- C-` to delete window 0.
  • Use the default prefix argument to delete current window.
    Ex: C-u C-` to delete current window.
  • If no prefix argument ig given, a number is read from minibuffer. A negative input will delete the window instead of selecting it.

  NB: On Spacemacs you can specify the prefix argument using SPC u. Ex: SPC u - 1 2 C-` to delete window 12.

Configuration

Custom keymap

To define your own bindings and override the default ones, override winum-keymap before activating the mode:

  (require 'winum)

  (setq winum-keymap (let ((map (make-sparse-keymap)))
                       (define-key map "\M-m 0" 'select-window-0)
                                          ; ...
                       (define-key map "\M-m 9" 'select-window-9)
                       map))
  (winum-mode)

This way your bindings will not error when the mode is turned off.

Customize options

Several options are available through Emacs' Customize interface under convenience > winum:

• winum-scope Frames affected by a number set. Choices are 'frame-local 'visible or 'global. Default: 'global
• winum-reverse-frame-list If t, order frames by reverse order of creation. Has effect only when winum-scope is not 'frame-local. Default: nil
• winum-auto-assign-0-to-minibuffer If non-nil, winum-mode assigns 0 to the minibuffer if active. Default: t
• winum-assign-func Function called for each window by winum-mode. This is called before automatic assignment begins. The function should return a number to have it assigned to the current-window, nil otherwise. Default: nil Example: always assign Calculator the number 9 and NeoTree the number 0:

  (defun my-winum-assign-func ()
    (cond
     ((equal (buffer-name) "*Calculator*")
      9)
     ((string-match-p (buffer-name) ".*\\*NeoTree\\*.*")
      0)
     (t
      nil)))

  (setq winum-assign-func 'my-winum-assign-func)

• winum-auto-setup-mode-line When nil, winum-mode will not display window numbers in the mode-line. You might want this to be nil if you use a package that already manages window numbers in the mode-line. Default: t
• winum-mode-line-position The position in the mode-line winum-mode displays the number. Default: 1
• winum-ignored-buffers List of buffers to ignore when selecting window. Default: '(" *which-key*")
• face: winum-face Face used for the number in the mode-line.

Configuration file example

Here is an example that you could put in your .emacs, which includes all available winum options.

  (add-to-list 'load-path "/path/to/install/folder/winum.el/")

  (require 'winum)

  (defun my-winum-assign-func ()
    (cond
     ((equal (buffer-name) "*Calculator*")
      9)
     ((string-match-p (buffer-name) ".*\\*NeoTree\\*.*")
      0)
     (t
      nil)))

  (set-face-property 'winum-face :weight 'bold)

  (setq window-numbering-scope            'global
	winum-reverse-frame-list          nil
	winum-auto-assign-0-to-minibuffer t
	winum-assign-func                 'my-winum-assign-func
	winum-auto-setup-mode-line        t
	winum-mode-line-position          1
	winum-ignored-buffers             '(" *which-key*")
	winum-keymap (let ((map (make-sparse-keymap)))
		       (define-key map (kbd "C-`") 'select-window-by-number)
		       (define-key map (kbd "M-0") 'select-window-0-or-10)
		       (define-key map (kbd "M-1") 'select-window-1)
		       (define-key map (kbd "M-2") 'select-window-2)
		       (define-key map (kbd "M-3") 'select-window-3)
		       (define-key map (kbd "M-4") 'select-window-4)
		       (define-key map (kbd "M-5") 'select-window-5)
		       (define-key map (kbd "M-6") 'select-window-6)
		       (define-key map (kbd "M-7") 'select-window-7)
		       (define-key map (kbd "M-8") 'select-window-8)
		       (define-key map (kbd "M-9") 'select-window-9)
		       map))

  (winum-mode)