Start work on a GUI for FTS

src/calibre/gui2/fts/scan.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
+
+import os
+from qt.core import QCheckBox, QVBoxLayout, QWidget
+
+from calibre.gui2.dialogs.confirm_delete import confirm
+from calibre.gui2.fts.utils import get_db
+
+
+class ScanStatus(QWidget):
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.l = l = QVBoxLayout(self)
+
+        self.enable_fts = b = QCheckBox(self)
+        b.setText(_('Index books in this library to allow searching their full text'))
+        l.addWidget(b)
+        self.apply_fts_state()
+        b.toggled.connect(self.change_fts_state)
+
+    def change_fts_state(self):
+        if not self.enable_fts.isChecked():
+            if not confirm(_('Disabling indexing will mean that all books will have to be re-scanned when re-enabling indexing.'
+                             ' Are you sure?'), 'disable-fts-indexing', self):
+                return
+        self.db.enable_fts(enabled=self.enable_fts.isChecked())
+        self.apply_fts_state()
+
+    def apply_fts_state(self):
+        b = self.enable_fts
+        f = b.font()
+        f.setBold(not b.isChecked())
+        b.setFont(f)
+
+    @property
+    def db(self):
+        return get_db()
+
+
+if __name__ == '__main__':
+    from calibre.gui2 import Application
+    from calibre.library import db
+    get_db.db = db(os.path.expanduser('~/test library'))
+    app = Application([])
+    w = ScanStatus()
+    w.show()
+    app.exec_()

src/calibre/gui2/fts/utils.py

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+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
+
+
+from calibre.gui2.ui import get_gui
+
+
+def get_db():
+    if hasattr(get_db, 'db'):
+        return get_db.db.new_api
+    return get_gui().current_db.new_api