config: nvim: rework basic configuration

config/nvim/init.vim

@@ -1,6 +1,4 @@
-" .vimrc
-
-" only vim and not vi
+" drop vi-compatibility
 set nocompatible
 " disable autocmd
 set secure
@@ -66,6 +64,9 @@ set smartcase
 " highlight all matches. use <C-L> to remove the highlights
 set hlsearch
 
+" treat hyphenated words as a single word
+set iskeyword+=-
+
 " syntax folding
 if has('folding')
 	set foldmethod=syntax
@@ -115,29 +116,56 @@ highlight ColorColumn ctermbg=235 guibg=#2d2d2d
 " display line numbers
 set number
 
+" show cursor position all the time
+set ruler
+
+" show tabs all the time
+set showtabline=2
+
 " show currently typed command
 set showcmd
 
 " define characters to display when using 'set list'
 set listchars=tab:→\ ,trail:∙,eol:¬,extends:❯,precedes:❮,nbsp:␣
 
-" Disable arrow keys
-"map <Right>	<Nop>
-"map <Left>	<Nop>
-"map <Up>	<Nop>
-"map <Down>	<Nop>
+" increase completion performance and reduce time until timeout
+set updatetime=300
+set timeoutlen=500
 
-"map! <Right>	<Nop>
-"map! <Left>	<Nop>
-"map! <Up>	<Nop>
-"map! <Down>	<Nop>
+" copy paste between vim and everything else
+" TODO: check whether the 'plus' suffix works with plain vim
+set clipboard=unnamedplus
 
+" Keybindings
 " allow easier pane switching
 nnoremap <C-J> <C-W><C-J>
 nnoremap <C-K> <C-W><C-K>
 nnoremap <C-L> <C-W><C-L>
 nnoremap <C-H> <C-W><C-H>
 
+" allow easier pane resizing
+nnoremap <M-J> :resize -2<CR>
+nnoremap <M-K> :resize +2<CR>
+nnoremap <M-L> :vertical resize -2<CR>
+nnoremap <M-H> :vertical resize +2<CR>
+
+" use TAB to switch to next buffers
+nnoremap <TAB> :bnext<CR>
+" use Shift-TAB to switch to previous buffers
+nnoremap <S-TAB> :bprevious<CR>
+
+" use TAB for skipping through completion options
+inoremap <expr><TAB> pumvisible() ? "\<C-n>" : "\<TAB>"
+inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<TAB>"
+
 " Misc
 set mouse=n
+
+" remove windows ^M when the encoding gets messed up
 noremap <Leader>m mmHmt:%s/<C-V><cr>//ge<cr>'tzt'm
+
+" autoreload vimrc when writing init.vim
+au! BufWritePost $MYVIMRC source %
+
+" add convenience command for force-saving read-only files
+cmap w!! w !sudo tee %