From 1fe6ed858d2c45d7fb619f0e92ecd8dad082a1db Mon Sep 17 00:00:00 2001
From: Alexander Courtis <alex@courtis.org>
Date: Tue, 17 Jun 2025 16:38:47 +1000
Subject: [PATCH] refactor(#2826): add lib.target_win_id to tabline

---
 lua/nvim-tree/view.lua | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lua/nvim-tree/view.lua b/lua/nvim-tree/view.lua
index 89894e71..e32c0452 100644
--- a/lua/nvim-tree/view.lua
+++ b/lua/nvim-tree/view.lua
@@ -9,6 +9,7 @@ local TABPAGES = {}
 --- Debugging only.
 --- Tabs show TABPAGES winnr and BUFNR_PER_TAB bufnr for the tab.
 --- Orphans for inexistent tab_ids are shown at the right.
+--- lib.target_winid is always shown at the right next to a close button.
 --- Enable with:
 ---   vim.opt.tabline = "%!v:lua.require('nvim-tree.view').tab_line()"
 ---   vim.opt.showtabline = 2
@@ -96,8 +97,8 @@ function M.tab_line()
     tl = tl .. " "
   end
 
-  -- close button
-  tl = tl .. "|%#TabLine#%999X X |"
+  -- target win id and close button
+  tl = tl .. "|%#TabLine# twi" .. (require("nvim-tree.lib").target_winid or "?") .. " %999X| X |"
 
   return tl
 end