Get the device path for matched books - the kobo stores kepubs in its own directory structure. This lays the groundwork for adding annotations support to the Kobo driver

src/calibre/devices/kobo/driver.py

@@ -77,6 +77,11 @@ class KOBO(USBMS):
         self.book_class = Book
         self.dbversion = 7
 
+    def create_annotations_path(self, mdata, device_path=None):
+        if device_path:
+            return device_path
+        return USBMS.create_annotations_path(self, mdata)
+
     def books(self, oncard=None, end_session=True):
         from calibre.ebooks.metadata.meta import path_to_ext
 

src/calibre/devices/usbms/device.py

@@ -1147,3 +1147,6 @@ class Device(DeviceConfig, DevicePlugin):
             os.makedirs(filedir)
 
         return filepath
+
+    def create_annotations_path(self, mdata, device_path=None):
+         return self.create_upload_path(os.path.abspath('/<storage>'), mdata, 'x.bookmark', create_dirs=False)

src/calibre/gui2/actions/annotate.py

@@ -41,13 +41,21 @@ class FetchAnnotationsAction(InterfaceAction):
                     fmts.append(format.lower())
             return fmts
 
+        def get_device_path_from_id(id_):
+            paths = []
+            for x in ('memory', 'card_a', 'card_b'):
+                x = getattr(self.gui, x+'_view').model()
+                paths += x.paths_for_db_ids(set([id_]), as_map=True)[id_]
+            return paths[0].path if paths else None
+
         def generate_annotation_paths(ids, db, device):
             # Generate path templates
             # Individual storage mount points scanned/resolved in driver.get_annotations()
             path_map = {}
             for id in ids:
+                path = get_device_path_from_id(id)
                 mi = db.get_metadata(id, index_is_id=True)
-                a_path = device.create_upload_path(os.path.abspath('/<storage>'), mi, 'x.bookmark', create_dirs=False)
+                a_path = device.create_annotations_path(mi, path)
                 path_map[id] = dict(path=a_path, fmts=get_formats(id))
             return path_map
 

src/calibre/gui2/library/models.py

@@ -1239,11 +1239,14 @@ class DeviceBooksModel(BooksModel): # {{{
     def paths(self, rows):
         return [self.db[self.map[r.row()]].path for r in rows ]
 
-    def paths_for_db_ids(self, db_ids):
-        res = []
+    def paths_for_db_ids(self, db_ids, as_map=False):
+        res = defaultdict(list) if as_map else []
         for r,b in enumerate(self.db):
             if b.application_id in db_ids:
-                res.append((r,b))
+                if as_map:
+                    res[b.application_id].append(b)
+                else:
+                    res.append((r,b))
         return res
 
     def get_collections_with_ids(self):