neovim

commit c4ac36bfd9bc9826dde01839d10d0e65a7b3c9e2
parent 5df1112e5f2112ce4f3b1fcf9ca78383fe5c9fee
Author: luukvbaal <luukvbaal@gmail.com>
Date:   Mon, 17 Nov 2025 19:34:02 +0100

fix(ui2): only redraw when necessary #36457

Problem:  Until now the UI callback called nvim__redraw() liberally.
          It should only be needed when Nvim does not update the screen
          in its own event loop.
Solution: Identify which UI events require immediate redrawing.
Diffstat:
M
runtime/lua/vim/_extui.lua
 | 
13
++++++++-----

1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/runtime/lua/vim/_extui.lua b/runtime/lua/vim/_extui.lua
@@ -42,11 +42,14 @@ local function ui_callback(event, ...)
   local handler = ext.msg[event] or ext.cmd[event]
   ext.check_targets()
   handler(...)
-  api.nvim__redraw({
-    flush = handler ~= ext.cmd.cmdline_hide or nil,
-    cursor = handler == ext.cmd[event] and true or nil,
-    win = handler == ext.cmd[event] and ext.wins.cmd or nil,
-  })
+  -- Cmdline mode and non-empty showcmd requires an immediate redraw.
+  if ext.cmd[event] or event == 'msg_showcmd' and select(1, ...)[1] then
+    api.nvim__redraw({
+      flush = handler ~= ext.cmd.cmdline_hide or nil,
+      cursor = handler == ext.cmd[event] and true or nil,
+      win = handler == ext.cmd[event] and ext.wins.cmd or nil,
+    })
+  end
 end
 local scheduled_ui_callback = vim.schedule_wrap(ui_callback)