From b714fc502395acf1cf6b481453efc92241701787 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 16 Jan 2024 21:34:15 +0530
Subject: [PATCH] Category notes browser: Add a button to search for books in
 the currently selected category. Fixes #2046825 [[Enhancement] Browse
 category notes](https://bugs.launchpad.net/calibre/+bug/2046825)

---
 src/calibre/gui2/library/notes.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/calibre/gui2/library/notes.py b/src/calibre/gui2/library/notes.py
index 877d7eacdc..963b804f52 100644
--- a/src/calibre/gui2/library/notes.py
+++ b/src/calibre/gui2/library/notes.py
@@ -454,8 +454,26 @@ class NotesBrowser(Dialog):
         b.clicked.connect(self.export_selected)
         b.setToolTip(_('Export the selected notes as HTML files'))
         h.addWidget(us), h.addStretch(10), h.addWidget(self.bb)
+        from calibre.gui2.ui import get_gui
+        gui = get_gui()
+        if gui is not None:
+            b = self.bb.addButton(_('Search books'), QDialogButtonBox.ButtonRole.ActionRole)
+            b.setToolTip(_('Search the calibre library for books in the currently selected category'))
+            b.clicked.connect(self.search_books)
+            b.setIcon(QIcon.ic('search.png'))
         QTimer.singleShot(0, self.do_find)
 
+    def search_books(self):
+        self.notes_display.current_result_changed
+        item = self.results_list.currentItem()
+        if item:
+            r = item.data(0, Qt.ItemDataRole.UserRole)
+            if isinstance(r, dict):
+                ival = r['text'].split('\n', 1)[0].replace('"', '\\"')
+                search_expression = f'{r["field"]}:"={ival}"'
+                from calibre.gui2.ui import get_gui
+                get_gui().search.set_search_string(search_expression)
+
     def export_selected(self):
         results = tuple(self.results_list.selected_results())
         if not results: