From bf67d70bd7265d075191e7812d8eb42b9791f737 Mon Sep 17 00:00:00 2001
From: Folke Lemaitre <folke.lemaitre@gmail.com>
Date: Mon, 22 Jan 2024 20:39:45 +0100
Subject: [PATCH] perf: ignore events when setting buf options during render.
 Fixes #694

---
 lua/noice/util/init.lua | 15 +++++++++++++--
 lua/noice/view/init.lua |  4 +++-
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/lua/noice/util/init.lua b/lua/noice/util/init.lua
index e8895589..a1d2cc11 100644
--- a/lua/noice/util/init.lua
+++ b/lua/noice/util/init.lua
@@ -43,11 +43,22 @@ function M.open(uri)
   end
 end
 
+---@param fn fun():any
+function M.ignore_events(fn)
+  local ei = vim.go.eventignore
+  vim.go.eventignore = "all"
+  local ret = fn()
+  vim.go.eventignore = ei
+  return ret
+end
+
 function M.tag(buf, tag)
-  local ft = vim.api.nvim_buf_get_option(buf, "filetype")
+  local ft = vim.bo[buf].filetype
 
   if ft == "" then
-    vim.api.nvim_buf_set_option(buf, "filetype", "noice")
+    M.ignore_events(function()
+      vim.bo[buf].filetype = "noice"
+    end)
   end
 
   if Config.options.debug and vim.api.nvim_buf_get_name(buf) == "" then
diff --git a/lua/noice/view/init.lua b/lua/noice/view/init.lua
index e32bd8b1..00f07fc1 100644
--- a/lua/noice/view/init.lua
+++ b/lua/noice/view/init.lua
@@ -221,7 +221,9 @@ function View:render(buf, opts)
   local linenr = opts.offset or 1
 
   if self._opts.buf_options then
-    require("nui.utils")._.set_buf_options(buf, self._opts.buf_options)
+    Util.ignore_events(function()
+      require("nui.utils")._.set_buf_options(buf, self._opts.buf_options)
+    end)
   end
 
   if self._opts.lang and not vim.b[buf].ts_highlight then