third_party/WebKit/Source/core/dom/IncrementLoadEventDelayCount.h

   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 IncrementLoadEventDelayCount_h
   6 #define IncrementLoadEventDelayCount_h
   7
   8 #include "platform/heap/Handle.h"
   9 #include "wtf/Allocator.h"
  10 #include "wtf/Noncopyable.h"
  11 #include "wtf/RefPtr.h"
  12
  13 namespace blink {
  14
  15 class Document;
  16
  17 // A helper class that will increment a document's loadEventDelayCount on
  18 // contruction and decrement it on destruction (semantics similar to RefPtr).
  19 class IncrementLoadEventDelayCount {
  20     WTF_MAKE_FAST_ALLOCATED(IncrementLoadEventDelayCount);
  21     WTF_MAKE_NONCOPYABLE(IncrementLoadEventDelayCount);
  22
  23 public:
  24     static PassOwnPtr<IncrementLoadEventDelayCount> create(Document&);
  25     ~IncrementLoadEventDelayCount();
  26
  27     // Increments the new document's count and decrements the old count.
  28     void documentChanged(Document& newDocument);
  29
  30 private:
  31     IncrementLoadEventDelayCount(Document&);
  32     RefPtrWillBePersistent<Document> m_document;
  33 };
  34 }
  35
  36 #endif