gecko-dev/image/ScriptedNotificationObserver.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "ScriptedNotificationObserver.h"
#include "imgIScriptedNotificationObserver.h"
#include "nsCycleCollectionParticipant.h"
#include "nsContentUtils.h"                     // for nsAutoScriptBlocker

namespace mozilla {
namespace image {

NS_IMPL_CYCLE_COLLECTION(ScriptedNotificationObserver, mInner)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ScriptedNotificationObserver)
  NS_INTERFACE_MAP_ENTRY(imgINotificationObserver)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(ScriptedNotificationObserver)
NS_IMPL_CYCLE_COLLECTING_RELEASE(ScriptedNotificationObserver)

ScriptedNotificationObserver::ScriptedNotificationObserver(
    imgIScriptedNotificationObserver* aInner)
: mInner(aInner)
{ }

NS_IMETHODIMP
ScriptedNotificationObserver::Notify(imgIRequest* aRequest,
                                     int32_t aType,
                                     const nsIntRect* /*aUnused*/)
{
  // For now, we block (other) scripts from running to preserve the historical
  // behavior from when ScriptedNotificationObserver::Notify was called as part
  // of the observers list in nsImageLoadingContent::Notify. Now each
  // ScriptedNotificationObserver has its own imgRequestProxy and thus gets
  // Notify called directly by imagelib.
  nsAutoScriptBlocker scriptBlocker;

  if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
    return mInner->SizeAvailable(aRequest);
  }
  if (aType == imgINotificationObserver::FRAME_UPDATE) {
    return mInner->FrameUpdate(aRequest);
  }
  if (aType == imgINotificationObserver::FRAME_COMPLETE) {
    return mInner->FrameComplete(aRequest);
  }
  if (aType == imgINotificationObserver::DECODE_COMPLETE) {
    return mInner->DecodeComplete(aRequest);
  }
  if (aType == imgINotificationObserver::LOAD_COMPLETE) {
    return mInner->LoadComplete(aRequest);
  }
  if (aType == imgINotificationObserver::DISCARD) {
    return mInner->Discard(aRequest);
  }
  if (aType == imgINotificationObserver::IS_ANIMATED) {
    return mInner->IsAnimated(aRequest);
  }
  if (aType == imgINotificationObserver::HAS_TRANSPARENCY) {
    return mInner->HasTransparency(aRequest);
  }
  return NS_OK;
}

} // namespace image
} // namespace mozilla