third_party/WebKit/Source/core/frame/DOMWindowProperty.cpp

   1 /*
   2  * Copyright (C) 2011 Google, Inc. All Rights Reserved.
   3  * Copyright (C) 2012 Apple Inc. All Rights Reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "core/frame/DOMWindowProperty.h"
  29
  30 #include "core/frame/LocalDOMWindow.h"
  31 #include "core/frame/LocalFrame.h"
  32
  33 namespace blink {
  34
  35 DOMWindowProperty::DOMWindowProperty(LocalFrame* frame)
  36     : m_frame(frame)
  37 #if !ENABLE(OILPAN)
  38     , m_associatedDOMWindow(nullptr)
  39 #endif
  40 {
  41     // FIXME: For now it *is* acceptable for a DOMWindowProperty to be created with a null frame.
  42     // See fast/dom/navigator-detached-no-crash.html for the recipe.
  43     // We should fix that.  <rdar://problem/11567132>
  44     if (m_frame) {
  45         // FIXME: Need to figure out what to do with DOMWindowProperties on
  46         // remote DOM windows.
  47 #if ENABLE(OILPAN)
  48         m_frame->localDOMWindow()->registerProperty(this);
  49 #else
  50         m_associatedDOMWindow = m_frame->localDOMWindow();
  51         m_associatedDOMWindow->registerProperty(this);
  52 #endif
  53     }
  54 }
  55
  56 #if !ENABLE(OILPAN)
  57 DOMWindowProperty::~DOMWindowProperty()
  58 {
  59     if (m_associatedDOMWindow)
  60         m_associatedDOMWindow->unregisterProperty(this);
  61 }
  62 #endif
  63
  64 void DOMWindowProperty::willDestroyGlobalObjectInFrame()
  65 {
  66     // If the property is getting this callback it must have been
  67     // created with a LocalFrame and it should still have it.
  68     ASSERT(m_frame);
  69     m_frame = nullptr;
  70
  71 #if !ENABLE(OILPAN)
  72     // LocalDOMWindow will along with notifying DOMWindowProperty objects of
  73     // impending destruction, unilaterally clear out its registered set.
  74     // Consequently, no explicit unregisteration required by DOMWindowProperty;
  75     // here or when destructed.
  76     ASSERT(m_associatedDOMWindow);
  77     m_associatedDOMWindow = nullptr;
  78 #endif
  79 }
  80
  81 void DOMWindowProperty::willDetachGlobalObjectFromFrame()
  82 {
  83     // If the property is getting this callback it must have been
  84     // created with a LocalFrame and it should still have it.
  85     ASSERT(m_frame);
  86 #if !ENABLE(OILPAN)
  87     // Ditto for its associated LocalDOMWindow.
  88     ASSERT(m_associatedDOMWindow);
  89 #endif
  90 }
  91
  92 DEFINE_TRACE(DOMWindowProperty)
  93 {
  94     visitor->trace(m_frame);
  95 }
  96
  97 } // namespace blink