fix(dir): select origin on parent navigation #40658

runtime/lua/nvim/dir.lua

@@ -158,7 +158,11 @@ end
 
 ---@param buf integer
 local function open_parent(buf)
-  navigate(fs.dirname(api.nvim_buf_get_name(buf)))
+  local path = api.nvim_buf_get_name(buf)
+  -- TODO(barrettruth): simplify after #40552
+  local name = encode_name(fs.basename(path)) .. (vim.fn.isdirectory(path) == 1 and '/' or '')
+  navigate(fs.dirname(path))
+  vim.fn.search([[\C\m^\V]] .. vim.fn.escape(name, [[\]]) .. [[\m$]], 'cw')
 end
 
 function M._open_entry()

test/functional/plugin/dir_spec.lua

@@ -155,6 +155,9 @@ describe('nvim.dir', function()
     assert_directory(root)
     line_of('alpha.txt')
 
+    -- Ensure the cursor stays on the entry we navigated up from.
+    eq('alpha.txt', api.nvim_get_current_line())
+
     n.clear({ args_rm = { '--cmd' }, args = { '--noplugin' } })
     api.nvim_buf_set_lines(0, 0, -1, false, { '  alpha', '  beta' })
     api.nvim_win_set_cursor(0, { 2, 7 })