From b76b0a6c53576f36908dd62bce32b4cee1bd7401 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sun, 10 May 2020 09:50:37 +0530
Subject: [PATCH] Add a clear search history context menu item to all search
 boxes

---
 src/calibre/gui2/search_box.py | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/calibre/gui2/search_box.py b/src/calibre/gui2/search_box.py
index 526249d6ed..015476ec65 100644
--- a/src/calibre/gui2/search_box.py
+++ b/src/calibre/gui2/search_box.py
@@ -35,6 +35,7 @@ class AsYouType(unicode_type):
 
 class SearchLineEdit(QLineEdit):  # {{{
     key_pressed = pyqtSignal(object)
+    clear_history = pyqtSignal()
     select_on_mouse_press = None
 
     def keyPressEvent(self, event):
@@ -49,14 +50,18 @@ class SearchLineEdit(QLineEdit):  # {{{
         self.parent().normalize_state()
         menu = self.createStandardContextMenu()
         menu.setAttribute(Qt.WA_DeleteOnClose)
-        for action in menu.actions():
-            if action.text().startswith(_('&Paste') + '\t'):
-                break
         ac = menu.addAction(_('Paste and &search'))
         ac.setEnabled(bool(QApplication.clipboard().text()))
         ac.setIcon(QIcon(I('search.png')))
         ac.triggered.connect(self.paste_and_search)
-        menu.insertAction(action, ac)
+        for action in menu.actions():
+            if action.text().startswith(_('&Paste') + '\t'):
+                menu.insertAction(action, ac)
+                break
+        else:
+            menu.addAction(ac)
+        menu.addSeparator()
+        menu.addAction(_('&Clear search history')).triggered.connect(self.clear_history)
         menu.exec_(ev.globalPos())
 
     def paste_and_search(self):
@@ -110,6 +115,7 @@ class SearchBox2(QComboBox):  # {{{
         QComboBox.__init__(self, parent)
         self.line_edit = SearchLineEdit(self)
         self.setLineEdit(self.line_edit)
+        self.line_edit.clear_history.connect(self.clear_history)
         if add_clear_action:
             self.lineEdit().setClearButtonEnabled(True)
             ac = self.findChild(QAction, QT_HIDDEN_CLEAR_ACTION)
@@ -152,6 +158,10 @@ class SearchBox2(QComboBox):  # {{{
         self.colorize = colorize
         self.clear()
 
+    def clear_search_history(self):
+        config[self.opt_name] = []
+        self.clear()
+
     def hide_completer_popup(self):
         try:
             self.lineEdit().completer().popup().setVisible(False)