[nvim] Add peekaboo plugin to display registers

nvim/.config/nvim/init.vim

@@ -35,15 +35,18 @@ Plug 'christoomey/vim-tmux-navigator'
 Plug 'jeffkreeftmeijer/vim-numbertoggle'
 Plug 'justinmk/vim-sneak'
 Plug 'RRethy/vim-illuminate'
+
+Plug 'scrooloose/nerdtree', { 'on': ['NERDTreeToggle', 'NERDTreeFind'] } " show a directory listing within vim
+Plug 'Xuyuanp/nerdtree-git-plugin', { 'on': ['NERDTreeToggle', 'NERDTreeFind'] } " show git status in nerdtree for files and dirs
+
 " editing
 Plug 'tpope/vim-commentary' " easily toggle comments for lines, paragraphs etc with gc
 Plug 'tpope/vim-surround' " lets you change surrounding things with cs (or ds to del, ys to add)
 Plug 'tommcdo/vim-exchange' " adds exchange operator with cx. common use: cxiw . on 2 words to switch
 Plug 'jiangmiao/auto-pairs' " Auto close brackets and ''
 Plug 'junegunn/vim-easy-align' " Align tables and other alignable things
+Plug 'junegunn/vim-peekaboo' " Show the contents of regiseters on pasting from '', @, <C-R>
 
-Plug 'scrooloose/nerdtree', { 'on': ['NERDTreeToggle', 'NERDTreeFind'] } " show a directory listing within vim
-Plug 'Xuyuanp/nerdtree-git-plugin', { 'on': ['NERDTreeToggle', 'NERDTreeFind'] } " show git status in nerdtree for files and dirs
 " Fuzzy matching
 Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --bin' }
 Plug 'junegunn/fzf.vim'

nvim/.config/nvim/plugin/vim-peekaboo.vim

@@ -0,0 +1,31 @@
+" PLUGIN: vim-peekaboo
+let g:peekaboo_delay=500
+
+function! CreateCenteredFloatingWindow()
+  let width = float2nr(&columns * 0.6)
+  let height = float2nr(&lines * 0.6)
+  let top = ((&lines - height) / 2) - 1
+  let left = (&columns - width) / 2
+  let opts = {'relative': 'editor', 'row': top, 'col': left, 'width': width, 'height': height, 'style': 'minimal'}
+
+  let top = "╭" . repeat("─", width - 2) . "╮"
+  let mid = "│" . repeat(" ", width - 2) . "│"
+  let bot = "╰" . repeat("─", width - 2) . "╯"
+  let lines = [top] + repeat([mid], height - 2) + [bot]
+  let s:buf = nvim_create_buf(v:false, v:true)
+  call nvim_buf_set_lines(s:buf, 0, -1, v:true, lines)
+  call nvim_open_win(s:buf, v:true, opts)
+  set winhl=Normal:Floating
+  let opts.row += 1
+  let opts.height -= 2
+  let opts.col += 2
+  let opts.width -= 4
+  call nvim_open_win(nvim_create_buf(v:false, v:true), v:true, opts)
+  au BufWipeout <buffer> exe 'bw '.s:buf
+endfunction
+
+if has('nvim-0.4.0') || has("patch-8.2.0191")
+    let g:peekaboo_window = "call CreateCenteredFloatingWindow()"
+else " Fallback to a split window
+    let g:peekaboo_window={"window": "vert bo 30new"}
+endif