Manager rerenders

- reuse existing buffer when possible and do not redraw
- save winid by tabpage
  > caveat: the table for the window will not be updated on `:q`
- add tab follow logic

lua/lib/colors.lua

@@ -56,12 +56,12 @@ local function get_links()
     CursorLine = 'CursorLine',
     VertSplit = 'VertSplit',
     CursorColumn = 'CursorColumn',
-    FileDirty = 'GitDirty',
-    FileNew = 'GitNew',
-    FileRenamed = 'GitRenamed',
-    FileMerge = 'GitMerge',
-    FileStaged = 'GitStaged',
-    FileDeleted = 'GitDeleted',
+    FileDirty = 'LuaTreeGitDirty',
+    FileNew = 'LuaTreeGitNew',
+    FileRenamed = 'LuaTreeGitRenamed',
+    FileMerge = 'LuaTreeGitMerge',
+    FileStaged = 'LuaTreeGitStaged',
+    FileDeleted = 'LuaTreeGitDeleted',
   }
 end
 

lua/nvim-tree.lua

@@ -2,13 +2,24 @@ local explorer = nil
 
 return {
   setup = require'nvim-tree.config'.setup,
+  close = require'nvim-tree.buffers.tree'.close,
+  redraw = function()
+    local buffers_tree = require'nvim-tree.buffers.tree'
+    vim.defer_fn(
+      function()
+        local should_redraw = #vim.tbl_keys(buffers_tree.windows) > 0
+        if should_redraw then
+          buffers_tree.open()
+        end
+      end, 1)
+  end,
   open = function()
     explorer = require'nvim-tree.explorer'.Explorer:new()
     local lines, highlights = require'nvim-tree.format'.format_nodes(explorer.node_tree)
-    require'nvim-tree.buffers.tree'.open()
-    require'nvim-tree.buffers.tree'.render(lines, highlights)
+    if require'nvim-tree.buffers.tree'.open() == 'norestore' then
+      require'nvim-tree.buffers.tree'.render(lines, highlights)
+    end
   end,
-  close = require'nvim-tree.buffers.tree'.close,
   open_file = function()
     local node, idx = explorer:get_node_under_cursor()
     if node.entries ~= nil then

lua/nvim-tree/buffers/tree.lua

@@ -6,8 +6,11 @@ M.config = {
   name = "NvimTree",
 }
 
+M.windows = {}
+
 local function is_open()
-  return vim.fn.bufwinnr(M.config.name) ~= -1
+  local tabpage = a.nvim_get_current_tabpage()
+  return M.windows[tabpage] ~= nil
 end
 
 local function bind(buf, left, right, opts)
@@ -25,6 +28,7 @@ function M.open()
   vim.wo[win].relativenumber = false
 
   local bufnr
+  local ret = ''
   if vim.fn.bufexists(M.config.name) ~= 0 then
     bufnr = vim.fn.bufnr(M.config.name)
   else
@@ -33,13 +37,17 @@ function M.open()
     vim.bo[bufnr].filetype = M.config.name
     vim.bo[bufnr].modifiable = false
     vim.bo[bufnr].swapfile = false
-  end
 
-  for left, right in pairs(M.config.keybindings) do
-    bind(bufnr, left, right)
+    for left, right in pairs(M.config.keybindings) do
+      bind(bufnr, left, right)
+    end
+
+    ret = 'norestore'
   end
 
   a.nvim_win_set_buf(win, bufnr)
+  M.windows[a.nvim_get_current_tabpage()] = win
+  return ret
 end
 
 function M.close()
@@ -47,7 +55,9 @@ function M.close()
   if #a.nvim_list_wins() == 1 then
     vim.cmd "q!"
   else
-    a.nvim_win_close(vim.fn.bufwinid(M.config.name), true)
+    local tabpage = a.nvim_get_current_tabpage()
+    a.nvim_win_close(M.windows[tabpage], true)
+    M.windows[tabpage] = nil
   end
 end
 
@@ -82,4 +92,5 @@ function M.configure(opts)
   end
 end
 
+M.is_open = is_open
 return M

lua/nvim-tree/colors.lua

@@ -53,12 +53,12 @@ local function get_links()
     CursorLine = 'CursorLine',
     VertSplit = 'VertSplit',
     CursorColumn = 'CursorColumn',
-    FileDirty = 'GitDirty',
-    FileNew = 'GitNew',
-    FileRenamed = 'GitRenamed',
-    FileMerge = 'GitMerge',
-    FileStaged = 'GitStaged',
-    FileDeleted = 'GitDeleted',
+    FileDirty = 'NvimTreeGitDirty',
+    FileNew = 'NvimTreeGitNew',
+    FileRenamed = 'NvimTreeGitRenamed',
+    FileMerge = 'NvimTreeGitMerge',
+    FileStaged = 'NvimTreeGitStaged',
+    FileDeleted = 'NvimTreeGitDeleted',
   }
 end
 

lua/nvim-tree/config.lua

@@ -71,6 +71,10 @@ function M.setup(opts)
   if M.config.auto_open then
     require'nvim-tree'.open()
   end
+
+  if M.config.tab_open then
+    vim.cmd "au TabEnter * lua require'nvim-tree'.redraw()"
+  end
 end
 
 return M