gecko/embedding/browser/webBrowser/nsEmbedStream.cpp

130 lines
3.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Christopher Blizzard.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Christopher Blizzard <blizzard@mozilla.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIAsyncInputStream.h"
#include "nsIDocShell.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIPipe.h"
#include "nsEmbedStream.h"
#include "nsNetError.h"
#include "nsString.h"
NS_IMPL_ISUPPORTS0(nsEmbedStream)
nsEmbedStream::nsEmbedStream()
{
mOwner = nsnull;
}
nsEmbedStream::~nsEmbedStream()
{
}
void
nsEmbedStream::InitOwner(nsIWebBrowser *aOwner)
{
mOwner = aOwner;
}
NS_METHOD
nsEmbedStream::Init(void)
{
return NS_OK;
}
NS_METHOD
nsEmbedStream::OpenStream(nsIURI *aBaseURI, const nsACString& aContentType)
{
nsresult rv;
NS_ENSURE_ARG_POINTER(aBaseURI);
NS_ENSURE_TRUE(IsASCII(aContentType), NS_ERROR_INVALID_ARG);
// if we're already doing a stream, return an error
if (mOutputStream)
return NS_ERROR_IN_PROGRESS;
nsCOMPtr<nsIAsyncInputStream> inputStream;
nsCOMPtr<nsIAsyncOutputStream> outputStream;
rv = NS_NewPipe2(getter_AddRefs(inputStream),
getter_AddRefs(outputStream),
PR_TRUE, PR_FALSE, 0, PR_UINT32_MAX);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIDocShell> docShell = do_GetInterface(mOwner);
rv = docShell->LoadStream(inputStream, aBaseURI, aContentType,
EmptyCString(), nsnull);
if (NS_FAILED(rv))
return rv;
mOutputStream = outputStream;
return rv;
}
NS_METHOD
nsEmbedStream::AppendToStream(const PRUint8 *aData, PRUint32 aLen)
{
nsresult rv;
NS_ENSURE_STATE(mOutputStream);
PRUint32 bytesWritten = 0;
rv = mOutputStream->Write(reinterpret_cast<const char*>(aData),
aLen, &bytesWritten);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(bytesWritten == aLen,
"underlying buffer couldn't handle the write");
return rv;
}
NS_METHOD
nsEmbedStream::CloseStream(void)
{
nsresult rv = NS_OK;
// NS_ENSURE_STATE returns NS_ERROR_UNEXPECTED if the condition isn't
// satisfied; this is exactly what we want to return.
NS_ENSURE_STATE(mOutputStream);
mOutputStream->Close();
mOutputStream = 0;
return rv;
}