| // Copyright 2014 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. |
| |
| #ifndef OpenedFrameTracker_h |
| #define OpenedFrameTracker_h |
| |
| #include "platform/wtf/HashSet.h" |
| #include "platform/wtf/Noncopyable.h" |
| |
| namespace blink { |
| |
| class WebFrame; |
| |
| // Small helper class to track the set of frames that a WebFrame has opened. |
| // Due to layering restrictions, we need to hide the implementation, since |
| // public/web/ cannot depend on wtf/. |
| class OpenedFrameTracker { |
| WTF_MAKE_NONCOPYABLE(OpenedFrameTracker); |
| |
| public: |
| OpenedFrameTracker(); |
| ~OpenedFrameTracker(); |
| |
| bool IsEmpty() const; |
| void Add(WebFrame*); |
| void Remove(WebFrame*); |
| |
| // Helper used when swapping a frame into the frame tree: this updates the |
| // opener for opened frames to point to the new frame being swapped in. |
| void TransferTo(WebFrame*); |
| |
| // Helper function to clear the openers when the frame is being detached. |
| void Dispose() { TransferTo(nullptr); } |
| |
| private: |
| WTF::HashSet<WebFrame*> opened_frames_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // WebFramePrivate_h |