Add "Noah's Ark Clause", three per family, to the list of active formatting elements

When adding new elements to the list, if there are already three same elements present, then remove the oldest one before inserting the new.
2015-04-05 13:30:34 +02:00
parent a62ccfdc51
commit c369abbfee
1 changed files with 15 additions and 0 deletions
@@ -45,6 +45,21 @@

 - (void)addElement:(HTMLElement *)element
 {
+	NSUInteger existing = 0;
+	for (HTMLElement *node in _list.reverseObjectEnumerator.allObjects) {
+		if ([node isEqual:[HTMLMarker marker]]) {
+			break;
+		}
+		if (node.namespace == element.namespace &&
+			[node.tagName isEqualToString:element.tagName] &&
+			[node.attributes isEqualTo:element.attributes]) {
+			existing++;
+		}
+		if (existing == 3) {
+			[_list removeObject:node];
+			break;
+		}
+	}
 	[_list addObject:element];
 }