Merge from trunk

src/calibre/gui2/dialogs/choose_library.py

@@ -10,7 +10,7 @@ import os
 from PyQt4.Qt import QDialog
 
 from calibre.gui2.dialogs.choose_library_ui import Ui_Dialog
-from calibre.gui2 import error_dialog, choose_dir, warning_dialog
+from calibre.gui2 import error_dialog, choose_dir
 from calibre.constants import filesystem_encoding
 from calibre import isbytestring, patheq
 from calibre.utils.config import prefs
@@ -62,12 +62,6 @@ class ChooseLibrary(QDialog, Ui_Dialog):
         return True
 
     def perform_action(self, ac, loc):
-        if ac in ('new', 'existing'):
-            warning_dialog(self.parent(), _('Custom columns'),
-                    _('If you use custom columns and they differ between '
-                        'libraries, you will have various problems. Best '
-                        'to ensure you have the same custom columns in each '
-                        'library.'), show=True)
         if ac in ('new', 'existing'):
             prefs['library_path'] = loc
             self.callback(loc)

src/calibre/gui2/dialogs/scheduler.py

@@ -62,6 +62,7 @@ class SchedulerDialog(QDialog, Ui_Dialog):
                 self.search_done)
         self.disconnect(self.recipe_model,  SIGNAL('searched(PyQt_PyObject)'),
                 self.search.search_done)
+        self.search.search.disconnect()
         self.recipe_model = None
 
     def search_done(self, *args):

src/calibre/gui2/dialogs/tag_categories.py

@@ -62,7 +62,7 @@ class TagCategories(QDialog, Ui_TagCategories):
                 self.all_items.append(t)
                 self.all_items_dict[label+':'+n] = t
 
-        self.categories = dict.copy(db.prefs['user_categories'])
+        self.categories = dict.copy(db.prefs.get('user_categories', {}))
         if self.categories is None:
             self.categories = {}
         for cat in self.categories:

src/calibre/gui2/search_box.py

@@ -16,7 +16,6 @@ from calibre.gui2 import config
 from calibre.gui2.dialogs.confirm_delete import confirm
 from calibre.gui2.dialogs.saved_search_editor import SavedSearchEditor
 from calibre.gui2.dialogs.search import SearchDialog
-from calibre.utils.config import prefs
 from calibre.utils.search_query_parser import saved_searches
 
 class SearchLineEdit(QLineEdit):

src/calibre/gui2/tag_view.py

@@ -17,7 +17,6 @@ from PyQt4.Qt import Qt, QTreeView, QApplication, pyqtSignal, \
 
 from calibre.ebooks.metadata import title_sort
 from calibre.gui2 import config, NONE
-from calibre.utils.config import prefs
 from calibre.library.field_metadata import TagsIcons
 from calibre.utils.search_query_parser import saved_searches
 from calibre.gui2 import error_dialog
@@ -224,7 +223,7 @@ class TagsView(QTreeView): # {{{
 
             # Always show the user categories editor
             self.context_menu.addSeparator()
-            if category in self.db.prefs['user_categories'].keys():
+            if category in self.db.prefs.get('user_categories', {}).keys():
                 self.context_menu.addAction(_('Manage User Categories'),
                         partial(self.context_menu_handler, action='manage_categories',
                                 category=category))
@@ -426,7 +425,7 @@ class TagsModel(QAbstractItemModel): # {{{
         for k in tb_cats.keys():
             if tb_cats[k]['kind'] in ['user', 'search']:
                 del tb_cats[k]
-        for user_cat in sorted(self.db.prefs['user_categories'].keys()):
+        for user_cat in sorted(self.db.prefs.get('user_categories', {}).keys()):
             cat_name = user_cat+':' # add the ':' to avoid name collision
             tb_cats.add_user_category(label=cat_name, name=user_cat)
         if len(saved_searches().names()):

src/calibre/library/database2.py

@@ -144,17 +144,18 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
         self.prefs = DBPrefs(self)
 
         # Migrate saved search and user categories to db preference scheme
-        def migrate_preference(name):
+        def migrate_preference(name, default):
+            obsolete = '###OBSOLETE--DON\'T USE ME###'
             ans = self.prefs.get(name, None)
             if ans is None:
                 ans = prefs[name]
-                if ans is None:
-                    raise ValueError('Preference %s is None!'%name)
-                prefs[name] = '###OBSOLETE--DON\'T USE ME###'
+                if ans in (None, obsolete):
+                    ans = default
+                prefs[name] = obsolete
                 self.prefs[name] = ans
 
-        migrate_preference('user_categories')
-        migrate_preference('saved_searches')
+        migrate_preference('user_categories', {})
+        migrate_preference('saved_searches', {})
         set_saved_searches(self, 'saved_searches')
 
         self.conn.executescript('''
@@ -285,7 +286,7 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
         for k in tb_cats.keys():
             if tb_cats[k]['kind'] in ['user', 'search']:
                 del tb_cats[k]
-        for user_cat in sorted(self.prefs['user_categories'].keys()):
+        for user_cat in sorted(self.prefs.get('user_categories', {}).keys()):
             cat_name = user_cat+':' # add the ':' to avoid name collision
             tb_cats.add_user_category(label=cat_name, name=user_cat)
         if len(saved_searches().names()):

src/calibre/utils/localization.py

@@ -42,6 +42,8 @@ def get_lang():
             lang = match.group()
     if lang == 'zh':
         lang = 'zh_CN'
+    if lang is None:
+        lang = 'en'
     return lang
 
 def messages_path(lang):

src/calibre/utils/search_query_parser.py

@@ -35,7 +35,7 @@ class SavedSearchQueries(object):
         self.opt_name = _opt_name;
         self.db = db
         if db is not None:
-            self.queries = db.prefs[self.opt_name]
+            self.queries = db.prefs.get(self.opt_name, {})
         else:
             self.queries = {}