From 2198787a15f4840651d35a9ec9608dfb33c6dc57 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 5 Sep 2022 08:26:30 +0530
Subject: [PATCH] Tag mapper: When specifying the replacement tag allow
 completion from the tags in the currently open library

---
 src/calibre/gui2/complete2.py  |  2 +-
 src/calibre/gui2/tag_mapper.py | 27 +++++++++++++++++++--------
 2 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/src/calibre/gui2/complete2.py b/src/calibre/gui2/complete2.py
index c16557707f..b0026a0c88 100644
--- a/src/calibre/gui2/complete2.py
+++ b/src/calibre/gui2/complete2.py
@@ -513,7 +513,7 @@ class EditWithComplete(EnComboBox):
     # }}}
 
     def text(self):
-        return str(self.lineEdit().text())
+        return self.lineEdit().text()
 
     def selectAll(self):
         self.lineEdit().selectAll()
diff --git a/src/calibre/gui2/tag_mapper.py b/src/calibre/gui2/tag_mapper.py
index d3b1530bec..c14c84d5c7 100644
--- a/src/calibre/gui2/tag_mapper.py
+++ b/src/calibre/gui2/tag_mapper.py
@@ -2,17 +2,18 @@
 # License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
 
 
-from collections import OrderedDict
 import textwrap
-
+from collections import OrderedDict
 from qt.core import (
-    QWidget, QVBoxLayout, QHBoxLayout, QPushButton, QLabel, QListWidget, QIcon, QDialog,
-    QSize, QComboBox, QLineEdit, QListWidgetItem, QStyledItemDelegate, QAbstractItemView,
-    QStaticText, Qt, QStyle, QToolButton, QInputDialog, QMenu, pyqtSignal, QPalette, QItemSelectionModel, QDialogButtonBox
+    QAbstractItemView, QComboBox, QDialog, QDialogButtonBox, QHBoxLayout, QIcon,
+    QInputDialog, QItemSelectionModel, QLabel, QLineEdit, QListWidget,
+    QListWidgetItem, QMenu, QPalette, QPushButton, QSize, QStaticText, QStyle,
+    QStyledItemDelegate, Qt, QToolButton, QVBoxLayout, QWidget, pyqtSignal
 )
 
-from calibre.ebooks.metadata.tag_mapper import map_tags, compile_pat
-from calibre.gui2 import error_dialog, Application, question_dialog
+from calibre.ebooks.metadata.tag_mapper import compile_pat, map_tags
+from calibre.gui2 import Application, error_dialog, question_dialog
+from calibre.gui2.complete2 import EditWithComplete
 from calibre.gui2.ui import get_gui
 from calibre.gui2.widgets2 import Dialog
 from calibre.utils.config import JSONConfig
@@ -37,6 +38,16 @@ class QueryEdit(QLineEdit):
         menu.exec(ev.globalPos())
 
 
+class SingleTagEdit(EditWithComplete):
+
+    def __init__(self, parent):
+        super().__init__(parent)
+        self.set_separator(None)
+        gui = get_gui()
+        if gui:
+            self.update_items_cache(gui.current_db.new_api.all_field_names('tags'))
+
+
 class RuleEdit(QWidget):
 
     ACTION_MAP = OrderedDict((
@@ -106,7 +117,7 @@ class RuleEdit(QWidget):
         l.addLayout(h)
         self.la3 = la = QLabel(self.REPLACE_TEXT + '\xa0')
         h.addWidget(la)
-        self.replace = r = QLineEdit(self)
+        self.replace = r = SingleTagEdit(self)
         h.addWidget(r)
         self.regex_help = la = QLabel('<p>' + self.REGEXP_HELP_TEXT % localize_user_manual_link(
         'https://manual.calibre-ebook.com/regexp.html'))