gecko-dev/gfx/layers/ipc/ShadowLayerParent.cpp

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at:
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 * The Initial Developer of the Original Code is
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 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Chris Jones <jones.chris.g@gmail.com>
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#include "ShadowLayersParent.h"
#include "ShadowLayerParent.h"
#include "ShadowLayers.h"

#include "BasicLayers.h"

namespace mozilla {
namespace layers {

ShadowLayerParent::ShadowLayerParent() : mLayer(NULL)
{
}

ShadowLayerParent::~ShadowLayerParent()
{
}

void
ShadowLayerParent::Bind(Layer* layer)
{
  mLayer = layer;
}

void
ShadowLayerParent::Destroy()
{
  // It's possible for Destroy() to come in just after this has been
  // created, but just before the transaction in which Bind() would
  // have been called.  In that case, we'll ignore shadow-layers
  // transactions from there on and never get a layer here.
  if (mLayer) {
    mLayer->Disconnect();
  }
}

ContainerLayer*
ShadowLayerParent::AsContainer() const
{
  return static_cast<ContainerLayer*>(AsLayer());
}

void
ShadowLayerParent::ActorDestroy(ActorDestroyReason why)
{
  switch (why) {
  case AncestorDeletion:
    NS_RUNTIMEABORT("shadow layer deleted out of order!");
    return;                     // unreached

  case Deletion:
    // See comment near Destroy() above.
    if (mLayer) {
      mLayer->Disconnect();
    }
    break;

  case AbnormalShutdown:
  case NormalShutdown:
    // let IPDL-generated code automatically clean up Shmems and so
    // forth; our channel is disconnected anyway
    break;

  case FailedConstructor:
    NS_RUNTIMEABORT("FailedConstructor isn't possible in PLayers");
    return;                     // unreached
  }

  mLayer = NULL;
}

} // namespace layers
} // namespace mozilla