diff --git a/src/calibre/gui2/comments_editor.py b/src/calibre/gui2/comments_editor.py
index 1d6e8097b9..50de42a3be 100644
--- a/src/calibre/gui2/comments_editor.py
+++ b/src/calibre/gui2/comments_editor.py
@@ -23,6 +23,7 @@ except ImportError:
 from calibre.ebooks.chardet import xml_to_unicode
 from calibre import xml_replace_entities, prepare_string_for_xml
 from calibre.gui2 import open_url, error_dialog, choose_files, gprefs, NO_URL_FORMATTING, secure_web_page
+from calibre.gui2.widgets import LineEditECM
 from calibre.utils.soupparser import fromstring
 from calibre.utils.config import tweaks
 from calibre.utils.imghdr import what
@@ -71,7 +72,7 @@ class BlockStyleAction(QAction):  # {{{
 # }}}
 
 
-class EditorWidget(QWebView):  # {{{
+class EditorWidget(QWebView, LineEditECM):  # {{{
 
     def __init__(self, parent=None):
         QWebView.__init__(self, parent)
@@ -418,12 +419,21 @@ class EditorWidget(QWebView):  # {{{
             return False
         return QWebView.event(self, ev)
 
+    def text(self):
+        return self.page().selectedText()
+
+    def setText(self, text):
+        self.exec_command('insertText', text)
+
     def contextMenuEvent(self, ev):
         menu = self.page().createStandardContextMenu()
         paste = self.pageAction(QWebPage.Paste)
         for action in menu.actions():
             if action == paste:
                 menu.insertAction(action, self.pageAction(QWebPage.PasteAndMatchStyle))
+        st = self.text()
+        if st and st.strip():
+            self.create_change_case_menu(menu)
         parent = self._parent()
         if hasattr(parent, 'toolbars_visible'):
             vis = parent.toolbars_visible
diff --git a/src/calibre/gui2/widgets.py b/src/calibre/gui2/widgets.py
index 183c3ae852..1e0b337c3f 100644
--- a/src/calibre/gui2/widgets.py
+++ b/src/calibre/gui2/widgets.py
@@ -92,7 +92,7 @@ class FilenamePattern(QWidget, Ui_Form):  # {{{
         self.re.lineEdit().setText(val)
 
         val_hist += gprefs.get('filename_pattern_history', [
-                               '(?P<title>.+)', '(?P<author>[^_-]+) -?\s*(?P<series>[^_0-9-]*)(?P<series_index>[0-9]*)\s*-\s*(?P<title>[^_].+) ?'])
+                               '(?P<title>.+)', r'(?P<author>[^_-]+) -?\s*(?P<series>[^_0-9-]*)(?P<series_index>[0-9]*)\s*-\s*(?P<title>[^_].+) ?'])
         if val in val_hist:
             del val_hist[val_hist.index(val)]
         val_hist.insert(0, val)
@@ -460,11 +460,8 @@ class LineEditECM(object):  # {{{
     Extend the context menu of a QLineEdit to include more actions.
     '''
 
-    def contextMenuEvent(self, event):
-        menu = self.createStandardContextMenu()
-        menu.addSeparator()
-
-        case_menu = QMenu(_('Change case'))
+    def create_change_case_menu(self, menu):
+        case_menu = QMenu(_('Change case'), menu)
         action_upper_case = case_menu.addAction(_('Upper case'))
         action_lower_case = case_menu.addAction(_('Lower case'))
         action_swap_case = case_menu.addAction(_('Swap case'))
@@ -476,8 +473,13 @@ class LineEditECM(object):  # {{{
         action_swap_case.triggered.connect(self.swap_case)
         action_title_case.triggered.connect(self.title_case)
         action_capitalize.triggered.connect(self.capitalize)
-
         menu.addMenu(case_menu)
+        return case_menu
+
+    def contextMenuEvent(self, event):
+        menu = self.createStandardContextMenu()
+        menu.addSeparator()
+        self.create_change_case_menu(menu)
         menu.exec_(event.globalPos())
 
     def upper_case(self):