feat: add popup information (#1042)

README.md

@@ -222,6 +222,7 @@ require'nvim-tree'.setup {
 - `W` will collapse the whole tree
 - `S` will prompt the user to enter a path and then expands the tree to match the path
 - `.` will enter vim command mode with the file the cursor is on
+- `C-k` will show file infos about the file under the cursor
 
 ### Settings
 
@@ -287,6 +288,7 @@ local list = {
   { key = "g?",                           action = "toggle_help" },
   { key = "W",                            action = "collapse_all" },
   { key = "S",                            action = "search_node" },
+  { key = "<C-k>",                        action = "show_file_info" },
   { key = ".",                            action = "run_file_command" }
 }
 ```

doc/nvim-tree-lua.txt

@@ -616,6 +616,7 @@ INFORMATIONS				        *nvim-tree-info*
 - `W` will collapse the whole tree
 - `S` will prompt the user to enter a path and then expands the tree to match the path
 - `.` will enter vim command mode with the file the cursor is on
+- `C-k` will show file infos about the file under the cursor
 
 Defaults to:
 >
@@ -657,7 +658,8 @@ Defaults to:
       { key = "g?",                           action = "toggle_help" },
       { key = 'W',                            action = "collapse_all" },
       { key = "S",                            action = "search_node" },
-      { key = ".",                            action = "run_file_command" }
+      { key = ".",                            action = "run_file_command" },
+      { key = "<C-k>",                        action = "show_file_info" }
     }
 <
 The `list` option in `view.mappings.list` is a table of

lua/nvim-tree/actions/file-popup.lua

@@ -0,0 +1,64 @@
+local a = vim.api
+local uv = vim.loop
+
+local M = {}
+
+local function get_formatted_lines(cwd)
+  local stats = uv.fs_stat(cwd)
+  local fpath = ' fullpath: ' .. cwd
+  local created_at = ' created:  ' .. os.date("%x %X", stats.birthtime.sec)
+  local modified_at = ' modified: ' .. os.date("%x %X", stats.mtime.sec)
+  local accessed_at = ' accessed: ' .. os.date("%x %X", stats.atime.sec)
+  local size = ' size:     ' .. stats.size .. ' bytes'
+
+  return {
+    fpath,
+    size,
+    accessed_at,
+    modified_at,
+    created_at,
+  }
+end
+
+local winnr = nil
+
+local function setup_window(lines)
+  local max_width = vim.fn.max(vim.tbl_map(function(n) return #n end, lines))
+  winnr = a.nvim_open_win(0, false, {
+    col = 1,
+    row = 1,
+    relative = "cursor",
+    width = max_width + 1,
+    height = #lines,
+    border = 'shadow',
+    noautocmd = true,
+    style = 'minimal'
+  })
+  local bufnr = a.nvim_create_buf(false, true)
+  a.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
+  a.nvim_win_set_buf(winnr, bufnr)
+end
+
+function M.close_popup()
+  if winnr ~= nil then
+    a.nvim_win_close(winnr, { force = true })
+    vim.cmd "augroup NvimTreeRemoveFilePopup | au! CursorMoved | augroup END"
+
+    winnr = nil
+  end
+end
+
+function M.show_file_info(node)
+  M.close_popup()
+
+  local lines = get_formatted_lines(node.absolute_path)
+  setup_window(lines)
+
+  vim.cmd [[
+    augroup NvimTreeRemoveFilePopup
+      au CursorMoved * lua require'nvim-tree.actions.file-popup'.close_popup()
+    augroup END
+  ]]
+end
+
+return M

lua/nvim-tree/actions/init.lua

@@ -43,7 +43,8 @@ local M = {
     { key = "g?",                           action = "toggle_help" },
     { key = 'W',                            action = "collapse_all" },
     { key = "S",                            action = "search_node" },
-    { key = ".",                            action = "run_file_command" }
+    { key = ".",                            action = "run_file_command" },
+    { key = "<C-k>",                        action = "show_file_info" }
   },
   custom_keypress_funcs = {},
 }
@@ -73,6 +74,7 @@ local keypress_funcs = {
   rename = require'nvim-tree.actions.rename-file'.fn(false),
   run_file_command = require'nvim-tree.actions.run-command'.run_file_command,
   search_node = require'nvim-tree.actions.search-node'.fn,
+  show_file_info = require'nvim-tree.actions.file-popup'.show_file_info,
   system_open = require'nvim-tree.actions.system-open'.fn,
   toggle_dotfiles = require"nvim-tree.actions.toggles".dotfiles,
   toggle_help = require"nvim-tree.actions.toggles".help,