Sibling invalidation sets

third_party/WebKit/Source/core/css/invalidation/InvalidationData.cpp

Index: third_party/WebKit/Source/core/css/invalidation/InvalidationData.cpp
diff --git a/third_party/WebKit/Source/core/css/invalidation/InvalidationData.cpp b/third_party/WebKit/Source/core/css/invalidation/InvalidationData.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..630233dec68815a0ac13143639930ae05fd1f76a
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/invalidation/InvalidationData.cpp
@@ -0,0 +1,43 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/css/invalidation/InvalidationData.h"
+
+namespace blink {
+
+DescendantInvalidationSet& InvalidationData::ensureDescendantInvalidationSet()
+{
+    if (!m_descendants)
+        m_descendants = DescendantInvalidationSet::create();
+    return *m_descendants;
+}
+
+SiblingInvalidationSet& InvalidationData::ensureSiblingInvalidationSet()
+{
+    if (!m_siblings)
+        m_siblings = SiblingInvalidationSet::create();
+    return *m_siblings;
+}
+
+InvalidationSet& InvalidationData::ensureInvalidationSet(InvalidationType type)
+{
+    if (type == InvalidateDescendants)
+        return ensureDescendantInvalidationSet();
+
+    return ensureSiblingInvalidationSet();
+}
+
+void InvalidationData::combine(const InvalidationData& other)
+{
+    if (other.descendants()) {
+        ensureDescendantInvalidationSet().combine(*other.descendants());
+    }
+
+    if (other.siblings()) {
+        ensureSiblingInvalidationSet().combine(*other.siblings());
+    }
+}
+
+} // namespace blink