SONY driver: Remove comments from books sent to SONY readers as the reader chokes on them

src/calibre/devices/interface.py

@@ -74,6 +74,12 @@ class DevicePlugin(Plugin):
     #: For example: ``frozenset(['kobo'])``
     VIRTUAL_BOOK_EXTENSIONS = frozenset([])
 
+    #: Whether to nuke comments in the copy of the book sent to the device. If
+    #: not None this should be short string that the comments will be replaced
+    #: by.
+    NUKE_COMMENTS = None
+
+
     @classmethod
     def get_gui_name(cls):
         if hasattr(cls, 'gui_name'):

src/calibre/devices/prs505/driver.py

@@ -56,6 +56,8 @@ class PRS505(USBMS):
 
     SUPPORTS_SUB_DIRS = True
     MUST_READ_METADATA = True
+    NUKE_COMMENTS = _('Comments have been removed as the SONY reader'
+            ' chokes on them')
     SUPPORTS_USE_AUTHOR_SORT = True
     EBOOK_DIR_MAIN = 'database/media/books'
     SCAN_FROM_ROOT = False

src/calibre/gui2/device.py

@@ -391,6 +391,10 @@ class DeviceManager(Thread): # {{{
                                     newmi.template_to_attribute(mi, cpb)
                                 else:
                                     newmi = mi
+                                nuke_comments = getattr(self.connected_device,
+                                        'NUKE_COMMENTS', None)
+                                if nuke_comments is not None:
+                                    mi.comments = nuke_comments
                                 set_metadata(stream, newmi, stream_type=ext)
                         except:
                             if DEBUG: