Home | History | Annotate | Download | only in frame 
      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 #if ENABLE(OILPAN)
     46         m_frame->domWindow()->registerProperty(this);
     47 #else
     48         m_associatedDOMWindow = m_frame->domWindow();
     49         m_associatedDOMWindow->registerProperty(this);
     50 #endif
     51     }
     52 }
     53 
     54 #if !ENABLE(OILPAN)
     55 DOMWindowProperty::~DOMWindowProperty()
     56 {
     57     if (m_associatedDOMWindow)
     58         m_associatedDOMWindow->unregisterProperty(this);
     59 }
     60 #endif
     61 
     62 void DOMWindowProperty::willDestroyGlobalObjectInFrame()
     63 {
     64     // If the property is getting this callback it must have been
     65     // created with a LocalFrame and it should still have it.
     66     ASSERT(m_frame);
     67     m_frame = nullptr;
     68 
     69 #if !ENABLE(OILPAN)
     70     // LocalDOMWindow will along with notifying DOMWindowProperty objects of
     71     // impending destruction, unilaterally clear out its registered set.
     72     // Consequently, no explicit unregisteration required by DOMWindowProperty;
     73     // here or when destructed.
     74     ASSERT(m_associatedDOMWindow);
     75     m_associatedDOMWindow = nullptr;
     76 #endif
     77 }
     78 
     79 void DOMWindowProperty::willDetachGlobalObjectFromFrame()
     80 {
     81     // If the property is getting this callback it must have been
     82     // created with a LocalFrame and it should still have it.
     83     ASSERT(m_frame);
     84 #if !ENABLE(OILPAN)
     85     // Ditto for its associated LocalDOMWindow.
     86     ASSERT(m_associatedDOMWindow);
     87 #endif
     88 }
     89 
     90 void DOMWindowProperty::trace(Visitor* visitor)
     91 {
     92     visitor->trace(m_frame);
     93 }
     94 
     95 } // namespace blink
     96