Enhancement: add restricting to the current VL in the tag browser category editor. See https://www.mobileread.com/forums/showthread.php?t=315414

src/calibre/gui2/dialogs/tag_list_editor.py

@@ -91,7 +91,7 @@ class EditColumnDelegate(QItemDelegate):
 
 class TagListEditor(QDialog, Ui_TagListEditor):
 
-    def __init__(self, window, cat_name, tag_to_match, data, sorter):
+    def __init__(self, window, cat_name, tag_to_match, get_book_ids, sorter):
         QDialog.__init__(self, window)
         Ui_TagListEditor.__init__(self)
         self.setupUi(self)
@@ -113,15 +113,9 @@ class TagListEditor(QDialog, Ui_TagListEditor):
             pass
 
         # initialization
-        self.to_rename = {}
-        self.to_delete = set([])
-        self.all_tags = {}
-        self.original_names = {}
-
-        for k,v,count in data:
-            self.all_tags[v] = {'key': k, 'count': count, 'cur_name': v, 'is_deleted': False}
-            self.original_names[k] = v
-        self.ordered_tags = sorted(self.all_tags.keys(), key=sorter)
+        self.ordered_tags = []
+        self.sorter = sorter
+        self.get_book_ids = get_book_ids
 
         # Set up the column headings
         self.down_arrow_icon = QIcon(I('arrow-down.png'))
@@ -140,7 +134,7 @@ class TagListEditor(QDialog, Ui_TagListEditor):
         self.table.setItemDelegate(EditColumnDelegate(self.table))
 
         # Add the data
-        select_item = self.fill_in_table(self.ordered_tags, tag_to_match)
+        select_item = self.fill_in_table(None, tag_to_match)
 
         # Scroll to the selected item if there is one
         if select_item is not None:
@@ -160,6 +154,8 @@ class TagListEditor(QDialog, Ui_TagListEditor):
         self.search_button.clicked.connect(self.all_matching_clicked)
         self.search_button.setDefault(True)
 
+        self.apply_vl_checkbox.clicked.connect(self.vl_box_changed)
+
         self.table.setEditTriggers(QTableWidget.EditKeyPressed)
 
         try:
@@ -171,7 +167,23 @@ class TagListEditor(QDialog, Ui_TagListEditor):
         except:
             pass
 
+    def vl_box_changed(self):
+        self.fill_in_table(None, None)
+
     def fill_in_table(self, tags, tag_to_match):
+        self.to_rename = {}
+        self.to_delete = set([])
+        self.all_tags = {}
+        self.original_names = {}
+
+        data = self.get_book_ids(self.apply_vl_checkbox.isChecked())
+        for k,v,count in data:
+            self.all_tags[v] = {'key': k, 'count': count, 'cur_name': v, 'is_deleted': False}
+            self.original_names[k] = v
+        self.ordered_tags = sorted(self.all_tags.keys(), key=self.sorter)
+        if tags is None:
+                tags = self.ordered_tags
+
         select_item = None
         self.table.blockSignals(True)
         self.table.clear()
@@ -220,7 +232,7 @@ class TagListEditor(QDialog, Ui_TagListEditor):
             self.all_tags[tag]['is_deleted'] = item.is_deleted
         search_for = icu_lower(unicode(self.search_box.text()))
         if len(search_for) == 0:
-            self.fill_in_table(self.ordered_tags, None)
+            self.fill_in_table(None, None)
         result = []
         for k in self.ordered_tags:
             if search_for in icu_lower(unicode(self.all_tags[k]['cur_name'])):

src/calibre/gui2/dialogs/tag_list_editor.ui

@@ -59,7 +59,19 @@
      </item>
     </layout>
    </item>
-   <item row="1" column="0">
+   <item row="1" column="0" colspan="3">
+    <widget class="QCheckBox" name="apply_vl_checkbox">
+     <property name="toolTip">
+      <string>&lt;p&gt;Show items in the Available items box only if they appear in the
+      current virtual library. Applied items not in the VL will be marked
+      &quot;not on any book&quot;.&lt;/p&gt;</string>
+     </property>
+     <property name="text">
+      <string>&amp;Show only available items in current virtual library</string>
+     </property>
+    </widget>
+   </item>
+   <item row="2" column="0">
     <layout class="QVBoxLayout" name="verticalLayout_2">
      <item>
       <widget class="QToolButton" name="delete_button">
@@ -132,7 +144,7 @@
      </item>
     </layout>
    </item>
-   <item row="1" column="1">
+   <item row="2" column="1">
     <widget class="QTableWidget" name="table">
      <property name="alternatingRowColors">
       <bool>true</bool>

src/calibre/gui2/tag_browser/ui.py

@@ -237,13 +237,15 @@ class TagBrowserMixin(object):  # {{{
         '''
 
         db = self.current_db
-        data = db.new_api.get_categories()
+
+        def get_book_ids(use_virtual_library):
+            book_ids = None if not use_virtual_library else self.tags_view.model().get_book_ids_to_use()
+            data = db.new_api.get_categories(book_ids=book_ids)
             if category in data:
                 result = [(t.id, t.original_name, t.count) for t in data[category] if t.count > 0]
             else:
                 result = None
-        if result is None:
-            return
+            return result
 
         if category == 'series':
             key = lambda x:sort_key(title_sort(x))
@@ -251,7 +253,7 @@ class TagBrowserMixin(object):  # {{{
             key = sort_key
 
         d = TagListEditor(self, cat_name=db.field_metadata[category]['name'],
-                          tag_to_match=tag, data=result, sorter=key)
+                          tag_to_match=tag, get_book_ids=get_book_ids, sorter=key)
         d.exec_()
         if d.result() == d.Accepted:
             to_rename = d.to_rename  # dict of old id to new name