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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef ChildFrameDisconnector_h
      6 #define ChildFrameDisconnector_h
      7 
      8 #include "platform/heap/Handle.h"
      9 
     10 namespace blink {
     11 
     12 class ElementShadow;
     13 class HTMLFrameOwnerElement;
     14 class Node;
     15 
     16 class ChildFrameDisconnector {
     17     STACK_ALLOCATED();
     18 public:
     19     enum DisconnectPolicy {
     20         RootAndDescendants,
     21         DescendantsOnly
     22     };
     23 
     24     explicit ChildFrameDisconnector(Node& root)
     25         : m_root(root)
     26     {
     27     }
     28 
     29     void disconnect(DisconnectPolicy = RootAndDescendants);
     30 
     31 private:
     32     void collectFrameOwners(Node&);
     33     void collectFrameOwners(ElementShadow&);
     34     void disconnectCollectedFrameOwners();
     35     Node& root() const { return *m_root; }
     36 
     37     WillBeHeapVector<RefPtrWillBeMember<HTMLFrameOwnerElement>, 10> m_frameOwners;
     38     RawPtrWillBeMember<Node> m_root;
     39 };
     40 
     41 } // namespace blink
     42 
     43 #endif // ChildFrameDisconnector_h
     44