Add right-click category search support to the tags browser

src/calibre/gui2/tag_view.py

@@ -186,7 +186,7 @@ class TagsView(QTreeView): # {{{
             self.clear()
 
     def context_menu_handler(self, action=None, category=None,
-                             key=None, index=None):
+                             key=None, index=None, negate=None):
         if not action:
             return
         try:
@@ -199,6 +199,9 @@ class TagsView(QTreeView): # {{{
             if action == 'manage_categories':
                 self.user_category_edit.emit(category)
                 return
+            if action == 'search_category':
+                self.tags_marked.emit(category + ':' + str(not negate))
+                return
             if action == 'manage_searches':
                 self.saved_search_edit.emit(category)
                 return
@@ -268,6 +271,15 @@ class TagsView(QTreeView): # {{{
                         m.addAction(col,
                             partial(self.context_menu_handler, action='show', category=col))
 
+                # search by category
+                self.context_menu.addAction(
+                        _('Search for books in category %s')%category,
+                        partial(self.context_menu_handler, action='search_category',
+                                category=key, negate=False))
+                self.context_menu.addAction(
+                        _('Search for books not in category %s')%category,
+                        partial(self.context_menu_handler, action='search_category',
+                                category=key, negate=True))
                 # Offer specific editors for tags/series/publishers/saved searches
                 self.context_menu.addSeparator()
                 if key in ['tags', 'publisher', 'series'] or \

src/calibre/library/caches.py

@@ -172,8 +172,9 @@ class ResultCache(SearchQueryParser): # {{{
     '''
     Stores sorted and filtered metadata in memory.
     '''
-    def __init__(self, FIELD_MAP, field_metadata):
+    def __init__(self, FIELD_MAP, field_metadata, db_prefs = None):
         self.FIELD_MAP = FIELD_MAP
+        self.db_prefs = db_prefs
         self.composites = {}
         for key in field_metadata:
             if field_metadata[key]['datatype'] == 'composite':
@@ -405,6 +406,22 @@ class ResultCache(SearchQueryParser): # {{{
                 matches.add(item[0])
         return matches
 
+    def get_user_category_matches(self, location, query, candidates):
+        res = set([])
+        if self.db_prefs is None:
+            return  res
+        user_cats = self.db_prefs['user_categories']
+        if location not in user_cats:
+            return res
+        c = set(candidates)
+        for (item, category, ign) in user_cats[location]:
+            s = self.get_matches(category, '=' + item, candidates=c)
+            c -= s
+            res |= s
+        if query == 'false':
+            return candidates - res
+        return res
+
     def get_matches(self, location, query, allow_recursion=True, candidates=None):
         matches = set([])
         if candidates is None:
@@ -443,6 +460,10 @@ class ResultCache(SearchQueryParser): # {{{
                     return self.get_numeric_matches(location, query[1:],
                                                     candidates, val_func=vf)
 
+            # check for user categories
+            if len(location) >= 2 and location.startswith('@'):
+                return self.get_user_category_matches(location[1:], query.lower(),
+                                                      candidates)
             # everything else, or 'all' matches
             matchkind = CONTAINS_MATCH
             if (len(query) > 1):
@@ -468,6 +489,8 @@ class ResultCache(SearchQueryParser): # {{{
             for x in range(len(self.FIELD_MAP)):
                 col_datatype.append('')
             for x in self.field_metadata:
+                if x.startswith('@'):
+                    continue
                 if len(self.field_metadata[x]['search_terms']):
                     db_col[x] = self.field_metadata[x]['rec_index']
                     if self.field_metadata[x]['datatype'] not in \

src/calibre/library/database2.py

@@ -332,7 +332,7 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
                 traceback.print_exc()
 
         self.book_on_device_func = None
-        self.data    = ResultCache(self.FIELD_MAP, self.field_metadata)
+        self.data    = ResultCache(self.FIELD_MAP, self.field_metadata, db_prefs=self.prefs)
         self.search  = self.data.search
         self.search_getting_ids  = self.data.search_getting_ids
         self.refresh = functools.partial(self.data.refresh, self)

src/calibre/library/field_metadata.py

@@ -475,6 +475,8 @@ class FieldMetadata(dict):
             val = self._tb_cats[key]
             if val['is_category'] and val['kind'] in ('user', 'search'):
                 del self._tb_cats[key]
+                if key in self._search_term_map:
+                    del self._search_term_map[key]
 
     def cc_series_index_column_for(self, key):
         return self._tb_cats[key]['rec_index'] + 1
@@ -485,8 +487,9 @@ class FieldMetadata(dict):
         self._tb_cats[label] = {'table':None,          'column':None,
                                 'datatype':None,       'is_multiple':None,
                                 'kind':'user',         'name':name,
-                                'search_terms':[],    'is_custom':False,
+                                'search_terms':[label],'is_custom':False,
                                 'is_category':True}
+        self._add_search_terms_to_map(label, [label])
 
     def add_search_category(self, label, name):
         if label in self._tb_cats: