Allow d'nd to the edit metadata action

src/calibre/gui2/actions/edit_metadata.py

@@ -27,6 +27,33 @@ class EditMetadataAction(InterfaceAction):
     action_type = 'current'
     action_add_menu = True
 
+    accepts_drops = True
+
+    def accept_enter_event(self, event, mime_data):
+        if mime_data.hasFormat("application/calibre+from_library"):
+            return True
+        return False
+
+    def accept_drag_move_event(self, event, mime_data):
+        if mime_data.hasFormat("application/calibre+from_library"):
+            return True
+        return False
+
+    def drop_event(self, event, mime_data):
+        mime = 'application/calibre+from_library'
+        if mime_data.hasFormat(mime):
+            self.dropped_ids = tuple(map(int, str(mime_data.data(mime)).split()))
+            QTimer.singleShot(1, self.do_drop)
+            return True
+        return False
+
+    def do_drop(self):
+        book_ids = self.dropped_ids
+        del self.dropped_ids
+        db = self.gui.library_view.model().db
+        rows = [db.row(i) for i in book_ids]
+        self.edit_metadata_for(rows, book_ids)
+
     def genesis(self):
         md = self.qaction.menu()
         cm = partial(self.create_menu_action, md)
@@ -186,18 +213,23 @@ class EditMetadataAction(InterfaceAction):
         Edit metadata of selected books in library.
         '''
         rows = self.gui.library_view.selectionModel().selectedRows()
-        previous = self.gui.library_view.currentIndex()
         if not rows or len(rows) == 0:
             d = error_dialog(self.gui, _('Cannot edit metadata'),
                              _('No books selected'))
             d.exec_()
             return
-
-        if bulk or (bulk is None and len(rows) > 1):
-            return self.edit_bulk_metadata(checked)
-
         row_list = [r.row() for r in rows]
+        m = self.gui.library_view.model()
+        ids = [m.id(r) for r in rows]
+        self.edit_metadata_for(row_list, ids, bulk=bulk)
+
+    def edit_metadata_for(self, rows, book_ids, bulk=None):
+        previous = self.gui.library_view.currentIndex()
+        if bulk or (bulk is None and len(rows) > 1):
+            return self.do_edit_bulk_metadata(rows, book_ids)
+
         current_row = 0
+        row_list = rows
 
         if len(row_list) == 1:
             cr = row_list[0]
@@ -242,7 +274,6 @@ class EditMetadataAction(InterfaceAction):
             db = self.gui.library_view.model().db
             view.view_format(db.row(id_), fmt)
 
-
     def edit_bulk_metadata(self, checked):
         '''
         Edit metadata of selected books in library in bulk.
@@ -256,6 +287,9 @@ class EditMetadataAction(InterfaceAction):
                     _('No books selected'))
             d.exec_()
             return
+        self.do_edit_bulk_metadata(rows, ids)
+
+    def do_edit_bulk_metadata(self, rows, book_ids):
         # Prevent the TagView from updating due to signals from the database
         self.gui.tags_view.blockSignals(True)
         changed = False
@@ -278,7 +312,7 @@ class EditMetadataAction(InterfaceAction):
             self.gui.tags_view.recount()
             if self.gui.cover_flow:
                 self.gui.cover_flow.dataChanged()
-            self.gui.library_view.select_rows(ids)
+            self.gui.library_view.select_rows(book_ids)
 
     # Merge books {{{
     def merge_books(self, safe_merge=False, merge_only_formats=False):