From 2e829adf9f59f3f8df22b74a482078208382aae8 Mon Sep 17 00:00:00 2001
From: un-pogaz <46523284+un-pogaz@users.noreply.github.com>
Date: Sun, 16 Oct 2022 10:10:54 +0200
Subject: [PATCH] fix "unlock tabs" no close button for 'all book'

---
 src/calibre/gui2/init.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/calibre/gui2/init.py b/src/calibre/gui2/init.py
index cb25dad68f..11584cdb26 100644
--- a/src/calibre/gui2/init.py
+++ b/src/calibre/gui2/init.py
@@ -440,12 +440,15 @@ class VLTabs(QTabBar):  # {{{
 
     def unlock_tab(self):
         gprefs['vl_tabs_closable'] = True
+        for idx in range(self.count()):
+            if not str(self.tabData(idx) or '').strip():
+                break
         self.setTabsClosable(True)
         try:
-            self.tabButton(0, QTabBar.ButtonPosition.RightSide).setVisible(False)
+            self.tabButton(idx, QTabBar.ButtonPosition.RightSide).setVisible(False)
         except AttributeError:
             try:
-                self.tabButton(0, QTabBar.ButtonPosition.LeftSide).setVisible(False)
+                self.tabButton(idx, QTabBar.ButtonPosition.LeftSide).setVisible(False)
             except AttributeError:
                 # On some OS X machines (using native style) the tab button is
                 # on the left