fix(renderer): fix cursor jumping (#1377)

Author: pysan3

lua/neo-tree/ui/renderer.lua

@@ -537,16 +537,13 @@ M.focus_node = function(state, id, do_not_focus_window, relative_movement, botto
       -- make sure we are not scrolled down if it can all fit on the screen
       local lines = vim.api.nvim_buf_line_count(state.bufnr)
       local win_height = vim.api.nvim_win_get_height(state.winid)
-      local expected_bottom_line = math.min(lines, linenr + 5) + bottom_scroll_padding
-      if expected_bottom_line > win_height then
-        execute_win_command("normal! zb")
-        local top = vim.fn.line("w0", state.winid)
-        local bottom = vim.fn.line("w$", state.winid)
-        local offset_top = top + (expected_bottom_line - bottom)
-        execute_win_command("normal! " .. offset_top .. "zt")
+      local virtual_bottom_line = vim.fn.line("w0", state.winid) + win_height - bottom_scroll_padding
+      if virtual_bottom_line <= linenr then
+        execute_win_command("normal! " .. (linenr + bottom_scroll_padding) .. "zb")
+        pcall(vim.api.nvim_win_set_cursor, state.winid, { linenr, col })
+      elseif virtual_bottom_line > lines then
+        execute_win_command("normal! " .. (lines + bottom_scroll_padding) .. "zb")
         pcall(vim.api.nvim_win_set_cursor, state.winid, { linenr, col })
-      elseif win_height > linenr then
-        execute_win_command("normal! zb")
       elseif linenr < (win_height / 2) then
         execute_win_command("normal! zz")
       end