From b4a6205b4d6ddb573fb9ec31c8d4ff67576339ad Mon Sep 17 00:00:00 2001
From: Fernando Schauenburg <dev@schauenburg.me>
Date: Sun, 15 Apr 2018 12:44:01 +0200
Subject: [PATCH] [vim] add easy cycling through numbering modes

Adapted from:
    https://raw.githubusercontent.com/wincent/wincent/master/roles/dotfiles/files/.vim/autoload/wincent/mappings/leader.vim
---
 vim/vimrc | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/vim/vimrc b/vim/vimrc
index 0f3e248..c568bc1 100644
--- a/vim/vimrc
+++ b/vim/vimrc
@@ -126,6 +126,22 @@ set nocompatible
     syntax enable
 " }}}
 
+" Functions {{{
+    " Cycle through relativenumber + number, number (only), and no numbering.
+    function! VimrcCycleNumbers() abort
+      if exists('+relativenumber')
+        execute {
+              \ '00': 'set relativenumber   | set number',
+              \ '01': 'set norelativenumber | set number',
+              \ '10': 'set norelativenumber | set nonumber',
+              \ '11': 'set norelativenumber | set number' }[&number . &relativenumber]
+      else
+        set number! " No relative numbering, just toggle numbers on and off.
+      endif
+    endfunction
+
+" }}}"
+
 " Mappings {{{
     let mapleader = "\<space>"
     let maplocalleader = ","
@@ -172,6 +188,10 @@ set nocompatible
 
     " fix whitespace
     nnoremap <leader>w :FixWhitespace<cr>
+
+    " cycle through line numbering modes
+    nnoremap <silent> <leader>r :call VimrcCycleNumbers()<CR>
+
 " }}}"
 
 augroup vimrc " {{{