gecko-dev/parser/html/nsHtml5StreamListener.cpp

/* 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 "nsHtml5StreamListener.h"

NS_IMPL_ADDREF(nsHtml5StreamListener)
NS_IMPL_RELEASE(nsHtml5StreamListener)

NS_INTERFACE_MAP_BEGIN(nsHtml5StreamListener)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIRequestObserver)
  NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
  NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
  NS_INTERFACE_MAP_ENTRY(nsIThreadRetargetableStreamListener)
NS_INTERFACE_MAP_END_THREADSAFE

nsHtml5StreamListener::nsHtml5StreamListener(nsHtml5StreamParser* aDelegate)
 : mDelegate(aDelegate)
{
}

nsHtml5StreamListener::~nsHtml5StreamListener()
{
}

void
nsHtml5StreamListener::DropDelegate()
{
  MOZ_ASSERT(NS_IsMainThread(),
             "Must not call DropDelegate from non-main threads.");
  mDelegate = nullptr;
}

NS_IMETHODIMP
nsHtml5StreamListener::CheckListenerChain()
{
  if (MOZ_UNLIKELY(!mDelegate)) {
    return NS_ERROR_NOT_AVAILABLE;
  }
  return mDelegate->CheckListenerChain();
}

NS_IMETHODIMP
nsHtml5StreamListener::OnStartRequest(nsIRequest* aRequest,
                                      nsISupports* aContext)
{
  if (MOZ_UNLIKELY(!mDelegate)) {
    return NS_ERROR_NOT_AVAILABLE;
  }
  return mDelegate->OnStartRequest(aRequest, aContext);
}

NS_IMETHODIMP
nsHtml5StreamListener::OnStopRequest(nsIRequest* aRequest,
                                     nsISupports* aContext,
                                     nsresult aStatus)
{
  if (MOZ_UNLIKELY(!mDelegate)) {
    return NS_ERROR_NOT_AVAILABLE;
  }
  return mDelegate->OnStopRequest(aRequest,
                                  aContext,
                                  aStatus);
}

NS_IMETHODIMP
nsHtml5StreamListener::OnDataAvailable(nsIRequest* aRequest,
                                       nsISupports* aContext,
                                       nsIInputStream* aInStream,
                                       uint64_t aSourceOffset,
                                       uint32_t aLength)
{
  if (MOZ_UNLIKELY(!mDelegate)) {
    return NS_ERROR_NOT_AVAILABLE;
  }
  return mDelegate->OnDataAvailable(aRequest,
                                    aContext,
                                    aInStream,
                                    aSourceOffset,
                                    aLength);
}