Add cut,copy and paste functionality.

Author: kristijanhusak

README.md

@@ -92,6 +92,9 @@ highlight LuaTreeFolderIcon guibg=blue
 - type `a` to add a file. Adding a directory requires leaving a leading `/` at the end of the path.
 > you can add multiple directories by doing foo/bar/baz/f and it will add foo bar and baz directories and f as a file
 - type `r` to rename a file
+- type `x` to add/remove file/directory to cut clipboard
+- type `c` to add/remove file/directory to copy clipboard
+- type `p` to paste from clipboard. Cut clipboard has precedence over copy (will prompt for confirmation)
 - type `d` to delete a file (will prompt for confirmation)
 - if the file is a directory, `<CR>` will open the directory otherwise it will open the file in the buffer near the tree
 - if the file is a symlink, `<CR>` will follow the symlink (if the target is a file)

doc/nvim-tree-lua.txt

@@ -136,6 +136,10 @@ INFORMATIONS				        *nvim-tree-info*
 
 - type 'a' to add a file
 - type 'r' to rename a file
+- type 'x' to add/remove file/directory to cut clipboard
+- type 'c' to add/remove file/directory to copy clipboard
+- type 'p' to paste from clipboard. Cut clipboard has precedence over copy
+  (will prompt for confirmation)
 - type 'd' to delete a file (will prompt for confirmation)
 
 - if the file is a directory, '<CR>' will open the directory
@@ -165,7 +169,10 @@ default keybindings will be applied to undefined keys.
 	\ preview:     '<Tab>',
         \ create:      'a',
         \ remove:      'd',
-        \ rename:      'r'
+        \ rename:      'r',
+        \ cut:         'x',
+        \ copy:        'c',
+        \ paste:       'p',
 	\ }
 
 |Features|					*nvim-tree-features*

lua/lib/config.lua

@@ -54,6 +54,9 @@ function M.get_bindings()
     create      = keybindings.create or 'a',
     remove      = keybindings.remove or 'd',
     rename      = keybindings.rename or 'r',
+    cut         = keybindings.cut or 'x',
+    copy        = keybindings.copy or 'c',
+    paste       = keybindings.paste or 'p',
   }
 end
 

lua/lib/fs.lua

@@ -3,6 +3,10 @@ local luv = vim.loop
 local open_mode = luv.constants.O_CREAT + luv.constants.O_WRONLY + luv.constants.O_TRUNC
 
 local M = {}
+local clipboard = {
+  move = {},
+  copy = {}
+}
 
 local function clear_prompt()
   vim.api.nvim_command('normal :esc<CR>')
@@ -109,6 +113,88 @@ local function remove_dir(cwd)
   return luv.fs_rmdir(cwd)
 end
 
+local function do_copy(source, destination)
+  local source_stats = luv.fs_stat(source)
+
+  if source_stats and source_stats.type == 'file' then
+    return luv.fs_copyfile(source, destination)
+  end
+
+  local handle = luv.fs_scandir(source)
+  if type(handle) == 'string' then
+    return api.nvim_err_writeln(handle)
+  end
+
+  luv.fs_mkdir(destination, source_stats.mode)
+
+  while true do
+    local name, t = luv.fs_scandir_next(handle)
+    if not name then break end
+
+    local new_name = source..'/'..name
+    local new_destination = destination..'/'..name
+    if t == 'directory' then
+      local success = do_copy(new_name, new_destination)
+      if not success then return false end
+    else
+      local success = luv.fs_copyfile(new_name, new_destination)
+      if not success then return false end
+    end
+  end
+
+  return true
+end
+
+local function do_paste(node, action_type, action_fn)
+  local clip = clipboard[action_type]
+  if #clip == 0 then return end
+
+  local destination = node.absolute_path
+  local stats = luv.fs_stat(destination)
+  local is_dir = stats and stats.type == 'directory'
+
+  if not is_dir then
+    destination = vim.fn.fnamemodify(destination, ':p:h')
+  elseif not node.open then
+    destination = vim.fn.fnamemodify(destination, ':p:h:h')
+  end
+
+  local msg = #clip..' entries'
+
+  if #clip == 1 then
+    msg = clip[1].absolute_path
+  end
+
+  local ans = vim.fn.input(action_type..' '..msg..' to '..destination..'? y/n: ')
+  clear_prompt()
+  if not ans:match('^y') then
+    return api.nvim_out_write('Canceled.\n')
+  end
+
+  for _, entry in ipairs(clip) do
+    local dest = destination..'/'..entry.name
+    local success = action_fn(entry.absolute_path, dest)
+    if not success then
+      api.nvim_err_writeln('Could not '..action_type..' '..entry.absolute_path)
+    end
+  end
+  clipboard[action_type] = {}
+  return refresh_tree()
+end
+
+local function add_to_clipboard(node, clip)
+  if node.name == '..' then return end
+
+  for idx, entry in ipairs(clip) do
+    if entry.absolute_path == node.absolute_path then
+      table.remove(clip, idx)
+      return api.nvim_out_write(node.absolute_path..' removed to clipboard.\n')
+    end
+  end
+  table.insert(clip, node)
+  api.nvim_out_write(node.absolute_path..' added to clipboard.\n')
+end
+
 function M.remove(node)
   if node.name == '..' then return end
 
@@ -153,4 +239,20 @@ function M.rename(node)
   refresh_tree()
 end
 
+function M.copy(node)
+  add_to_clipboard(node, clipboard.copy)
+end
+
+function M.cut(node)
+  add_to_clipboard(node, clipboard.move)
+end
+
+function M.paste(node)
+  if clipboard.move[1] ~= nil then
+    return do_paste(node, 'move', luv.fs_rename)
+  end
+
+  return do_paste(node, 'copy', do_copy)
+end
+
 return M

lua/lib/lib.lua

@@ -209,6 +209,9 @@ local function set_mappings()
     [bindings.remove] = 'on_keypress("remove")';
     [bindings.rename] = 'on_keypress("rename")';
     [bindings.preview] = 'on_keypress("preview")';
+    [bindings.cut] = 'on_keypress("cut")';
+    [bindings.copy] = 'on_keypress("copy")';
+    [bindings.paste] = 'on_keypress("paste")';
     gx = "xdg_open()";
   }
 

lua/tree.lua

@@ -38,6 +38,12 @@ function M.on_keypress(mode)
     return fs.remove(node)
   elseif mode == 'rename' then
     return fs.rename(node)
+  elseif mode == 'copy' then
+    return fs.copy(node)
+  elseif mode == 'cut' then
+    return fs.cut(node)
+  elseif mode == 'paste' then
+    return fs.paste(node)
   end
 
   if mode == 'preview' then