Bulk trim newdb

Widget + newdb modifications

src/calibre/gui2/dialogs/metadata_bulk.py

@@ -204,6 +204,16 @@ class MyBlockingBusyNew(QDialog):  # {{{
                     covers.sort(key=lambda x: x[1])
                     if covers:
                         cache.set_cover({book_id:covers[-1][0]})
+        elif args.cover_action == 'trim':
+            from calibre.utils.magick import Image
+            for book_id in self.ids:
+                cdata = cache.cover(book_id)
+                if cdata:
+                    im = Image()
+                    im.load(cdata)
+                    im.trim(10)
+                    cdata = im.export('png')
+                    cache.set_cover({book_id:cdata})
 
         # Formats
         if args.do_remove_format:
@@ -1213,6 +1223,8 @@ class MetadataBulkDialog(ResizableDialog, Ui_MetadataBulkDialog):
             cover_action = 'generate'
         elif self.cover_from_fmt.isChecked():
             cover_action = 'fromfmt'
+        elif self.cover_trim.isChecked():
+            cover_action = 'trim'
 
         args = Settings(remove_all, remove, add, au, aus, do_aus, rating, pub, do_series,
                 do_autonumber, do_remove_format, remove_format, do_swap_ta,

src/calibre/gui2/dialogs/metadata_bulk.ui

@@ -603,6 +603,13 @@ Future conversion of these books will use the default settings.</string>
                 </property>
                </widget>
               </item>
+              <item>
+               <widget class="QRadioButton" name="cover_trim">
+                <property name="text">
+                 <string>&amp;Trim cover</string>
+                </property>
+               </widget>
+              </item>
               <item>
                <widget class="QRadioButton" name="cover_from_fmt">
                 <property name="text">