better nvim tree

home/.config/nvim/main.vim

@@ -18,13 +18,16 @@ set completeopt=menuone,noinsert,noselect
 
 " Set completeopt to have a better completion experience"
 set completeopt=menuone,noinsert,noselect
+
+" load nvim-tree stuff
+runtime nvim-tree.vim
+
 call plug#begin()
 
 Plug 'glacambre/firenvim', { 'do': { _ -> firenvim#install(0) } }
 Plug 'jiangmiao/auto-pairs'
 Plug 'mhinz/vim-startify'
 Plug 'neoclide/coc.nvim', {'branch': 'release'}
-Plug 'nvim-tree/nvim-tree.lua'
 Plug 'psliwka/vim-smoothie' " scorll with STRG + d or STRG + u
 Plug 'romgrk/barbar.nvim'          " tabs for buffers
 Plug 'EdenEast/nightfox.nvim'      " Vim-Plug
@@ -32,7 +35,6 @@ Plug 'numToStr/FTerm.nvim'         " floating terminal, toggle with <F11>
 Plug 'kdheepak/lazygit.nvim'
 Plug 'nvim-lualine/lualine.nvim'   " nicer status line
 Plug 'goolord/alpha-nvim'
-Plug 'nvim-tree/nvim-web-devicons'
 Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
 Plug 'junegunn/fzf.vim'
 Plug 'iamcco/markdown-preview.nvim', { 'do': 'cd app && yarn install' }
@@ -43,6 +45,7 @@ runtime markdownpreview.vim
 
 call plug#end()
 
+
 " no default mappings for vim smoothie (fancy scrolling)
 let g:smoothie_no_default_mappings = 1
 
@@ -59,10 +62,6 @@ inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
 " Set completeopt to have a better completion experience"
 set completeopt=menuone,noinsert,noselect
 
-
-" Open NvimTree with f5"
-nnoremap <F5> :NvimTreeToggle<CR>
-
 " Move to previous/next"
 nnoremap <silent>    <A-,> <Cmd>BufferPrevious<CR>
 nnoremap <silent>    <A-.> <Cmd>BufferNext<CR>
@@ -145,8 +144,6 @@ vim.g.loaded_netrwPlugin = 1
 -- set termguicolors to enable highlight groups
 vim.opt.termguicolors = true
 
--- empty setup using defaults
-require("nvim-tree").setup()
 
 require('lualine').setup {
     options = {

home/.config/nvim/nvim-tree.vim

@@ -0,0 +1,65 @@
+call plug#begin()
+Plug 'nvim-tree/nvim-tree.lua'
+Plug 'nvim-tree/nvim-web-devicons'
+call plug#end()
+
+
+" Open NvimTree with f5"
+nnoremap <F5> :NvimTreeToggle<CR>
+
+
+lua << EOF
+
+local HEIGHT_RATIO = 0.8  -- You can change this
+local WIDTH_RATIO = 0.8   -- You can change this too
+
+local function my_on_attach(bufnr)
+  local api = require "nvim-tree.api"
+
+  local function opts(desc)
+    return { desc = "nvim-tree: " .. desc, buffer = bufnr, noremap = true, silent = true, nowait = true }
+  end
+
+  -- default mappings
+  --api.config.mappings.default_on_attach(bufnr)
+
+  -- custom mappings
+  -- cd 
+  vim.keymap.set('n', '<C-c>', api.tree.change_root_to_node,        opts('Up'))
+  vim.keymap.set('n', '?',     api.tree.toggle_help,                  opts('Help'))
+end
+
+-- empty setup using defaults
+require("nvim-tree").setup()
+require('nvim-tree').setup({
+  view = {
+    float = {
+      enable = true,
+      open_win_config = function()
+        local screen_w = vim.opt.columns:get()
+        local screen_h = vim.opt.lines:get() - vim.opt.cmdheight:get()
+        local window_w = screen_w * WIDTH_RATIO
+        local window_h = screen_h * HEIGHT_RATIO
+        local window_w_int = math.floor(window_w)
+        local window_h_int = math.floor(window_h)
+        local center_x = (screen_w - window_w) / 2
+        local center_y = ((vim.opt.lines:get() - window_h) / 2)
+                         - vim.opt.cmdheight:get()
+        return {
+          border = 'rounded',
+          relative = 'editor',
+          row = center_y,
+          col = center_x,
+          width = window_w_int,
+          height = window_h_int,
+        }
+        end,
+    },
+    width = function()
+      return math.floor(vim.opt.columns:get() * WIDTH_RATIO)
+    end,
+  },
+  on_attach = my_on_attach,
+})
+
+EOF