Another try at the special collection stuff

src/calibre/devices/prs505/driver.py

@@ -58,9 +58,16 @@ class PRS505(USBMS):
     SUPPORTS_USE_AUTHOR_SORT = True
     EBOOK_DIR_MAIN = 'database/media/books'
 
+    ALL_BY_TITLE  = _('All by title')
+    ALL_BY_AUTHOR = _('All by author')
+
     EXTRA_CUSTOMIZATION_MESSAGE = _('Comma separated list of metadata fields '
             'to turn into collections on the device. Possibilities include: ')+\
-                    'series, tags, authors'
+                    'series, tags, authors' +\
+            _('. Two special collections are available: %s:%s and %s:%s. Add  '
+            'these values to the list to enable them. The collections will be '
+            'given the name provided after the ":" character.')%(
+                                    'abt', ALL_BY_TITLE, 'aba', ALL_BY_AUTHOR)
     EXTRA_CUSTOMIZATION_DEFAULT = ', '.join(['series', 'tags'])
 
     plugboard = None
@@ -151,7 +158,7 @@ class PRS505(USBMS):
                 blists[i] = booklists[i]
         opts = self.settings()
         if opts.extra_customization:
-            collections = [x.lower().strip() for x in
+            collections = [x.strip() for x in
                     opts.extra_customization.split(',')]
         else:
             collections = []

src/calibre/devices/usbms/books.py

@@ -134,14 +134,17 @@ class CollectionsBookList(BookList):
         collections = {}
 
         # get the special collection names
-        try:
-            all_by_author = tweaks['device_special_collections']['author']
-        except:
-            all_by_author = ''
-        try:
-            all_by_title = tweaks['device_special_collections']['title']
-        except:
-            all_by_title = ''
+        all_by_author = ''
+        all_by_title = ''
+        ca = []
+        for c in collection_attributes:
+            if c.startswith('aba:') and c[4:]:
+                all_by_author = c[4:]
+            elif c.startswith('abt:') and c[4:]:
+                all_by_title = c[4:]
+            else:
+                ca.append(c.lower())
+        collection_attributes = ca
 
         for book in self:
             tsval = book.get('_pb_title_sort',