feat: add popup information (#1042)

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