Add the ability to control the order of categories in the tag browser

resources/default_tweaks.py

@@ -128,6 +128,17 @@ categories_collapsed_name_template = r'{first.sort:shorten(4,,0)} - {last.sort:s
 categories_collapsed_rating_template = r'{first.avg_rating:4.2f:ifempty(0)} - {last.avg_rating:4.2f:ifempty(0)}'
 categories_collapsed_popularity_template = r'{first.count:d} - {last.count:d}'
 
+#: Control order of categories in the tag browser
+# Change the following dict to change the order that categories are displayed in
+# the tag browser. Items are named using their lookup name, and will be sorted
+# using the number supplied. The lookup name '*' stands for all names that
+# otherwise do not appear. Two names with the same value will be sorted
+# according the the default order; the one used when the dict is empty.
+# Example: tag_browser_category_order = {'series':1, 'tags':2, '*':3}
+# resulting in the order series, tags, then everything else in default order.
+tag_browser_category_order = {'*':1}
+
+
 #: Specify columns to sort the booklist by on startup
 # Provide a set of columns to be sorted on when calibre starts
 #  The argument is None if saved sort history is to be used

src/calibre/gui2/tag_browser/model.py

@@ -831,7 +831,11 @@ class TagsModel(QAbstractItemModel): # {{{
                         if lower(t.name).find(self.filter_categories_by) >= 0]
 
         tb_categories = self.db.field_metadata
-        for category in tb_categories:
+        tb_keys = tb_categories.keys()
+        tb_keys.sort(key=lambda x,
+                                y=tweaks['tag_browser_category_order']:
+                                    y[x] if x in y else y['*'] if '*' in y else 100)
+        for category in tb_keys:
             if category in data: # The search category can come and go
                 self.row_map.append(category)
                 self.categories[category] = tb_categories[category]['name']