зеркало из https://github.com/mozilla/pjs.git
273 строки
7.2 KiB
C++
273 строки
7.2 KiB
C++
/* ***** 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 <nsIPipe.h>
|
|
#include <nsIInputStream.h>
|
|
#include <nsIOutputStream.h>
|
|
#include <nsIContentViewerContainer.h>
|
|
#include <nsIDocumentLoaderFactory.h>
|
|
#include <nsNetUtil.h>
|
|
#include <prmem.h>
|
|
|
|
#include "nsXPCOMCID.h"
|
|
#include "nsICategoryManager.h"
|
|
|
|
#include "nsIContentViewer.h"
|
|
|
|
#include "nsEmbedStream.h"
|
|
#include "nsReadableUtils.h"
|
|
|
|
// nsIInputStream interface
|
|
|
|
NS_IMPL_ISUPPORTS1(nsEmbedStream, nsIInputStream)
|
|
|
|
nsEmbedStream::nsEmbedStream()
|
|
{
|
|
mOwner = nsnull;
|
|
mOffset = 0;
|
|
mDoingStream = PR_FALSE;
|
|
}
|
|
|
|
nsEmbedStream::~nsEmbedStream()
|
|
{
|
|
}
|
|
|
|
void
|
|
nsEmbedStream::InitOwner(nsIWebBrowser *aOwner)
|
|
{
|
|
mOwner = aOwner;
|
|
}
|
|
|
|
NS_METHOD
|
|
nsEmbedStream::Init(void)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
nsCOMPtr<nsIInputStream> bufInStream;
|
|
nsCOMPtr<nsIOutputStream> bufOutStream;
|
|
|
|
rv = NS_NewPipe(getter_AddRefs(bufInStream),
|
|
getter_AddRefs(bufOutStream));
|
|
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
mInputStream = bufInStream;
|
|
mOutputStream = bufOutStream;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_METHOD
|
|
nsEmbedStream::OpenStream(nsIURI *aBaseURI, const nsACString& aContentType)
|
|
{
|
|
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 (mDoingStream)
|
|
return NS_ERROR_IN_PROGRESS;
|
|
|
|
// set our state
|
|
mDoingStream = PR_TRUE;
|
|
|
|
// initialize our streams
|
|
nsresult rv = Init();
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// get the viewer container
|
|
nsCOMPtr<nsIContentViewerContainer> viewerContainer;
|
|
viewerContainer = do_GetInterface(mOwner);
|
|
|
|
// create a new load group
|
|
rv = NS_NewLoadGroup(getter_AddRefs(mLoadGroup), nsnull);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// create a new input stream channel
|
|
rv = NS_NewInputStreamChannel(getter_AddRefs(mChannel), aBaseURI,
|
|
static_cast<nsIInputStream *>(this),
|
|
aContentType);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// set the channel's load group
|
|
rv = mChannel->SetLoadGroup(mLoadGroup);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// find a document loader for this content type
|
|
|
|
const nsCString& flatContentType = PromiseFlatCString(aContentType);
|
|
|
|
nsXPIDLCString docLoaderContractID;
|
|
nsCOMPtr<nsICategoryManager> catMan(do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv));
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
rv = catMan->GetCategoryEntry("Gecko-Content-Viewers",
|
|
flatContentType.get(),
|
|
getter_Copies(docLoaderContractID));
|
|
// Note: When the category manager does not find an entry for the requested
|
|
// contract ID, it will return NS_ERROR_NOT_AVAILABLE. This conveniently
|
|
// matches what this method wants to return in that case.
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory;
|
|
docLoaderFactory = do_GetService(docLoaderContractID.get(), &rv);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// ok, create an instance of the content viewer for that command and
|
|
// mime type
|
|
nsCOMPtr<nsIContentViewer> contentViewer;
|
|
rv = docLoaderFactory->CreateInstance("view", mChannel, mLoadGroup,
|
|
flatContentType.get(), viewerContainer,
|
|
nsnull,
|
|
getter_AddRefs(mStreamListener),
|
|
getter_AddRefs(contentViewer));
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// set the container viewer container for this content view
|
|
rv = contentViewer->SetContainer(viewerContainer);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// embed this sucker
|
|
rv = viewerContainer->Embed(contentViewer, "view", nsnull);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// start our request
|
|
rv = mStreamListener->OnStartRequest(mChannel, NULL);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_METHOD
|
|
nsEmbedStream::AppendToStream(const PRUint8 *aData, PRUint32 aLen)
|
|
{
|
|
nsresult rv;
|
|
|
|
// append the data
|
|
rv = Append(aData, aLen);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// notify our listeners
|
|
rv = mStreamListener->OnDataAvailable(mChannel,
|
|
NULL,
|
|
static_cast<nsIInputStream *>(this),
|
|
mOffset, /* offset */
|
|
aLen); /* len */
|
|
// move our counter
|
|
mOffset += aLen;
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
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(mDoingStream);
|
|
mDoingStream = PR_FALSE;
|
|
|
|
rv = mStreamListener->OnStopRequest(mChannel, NULL, NS_OK);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
mLoadGroup = nsnull;
|
|
mChannel = nsnull;
|
|
mStreamListener = nsnull;
|
|
mOffset = 0;
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_METHOD
|
|
nsEmbedStream::Append(const PRUint8 *aData, PRUint32 aLen)
|
|
{
|
|
PRUint32 bytesWritten = 0;
|
|
nsresult rv = mOutputStream->Write(reinterpret_cast<const char*>(aData),
|
|
aLen, &bytesWritten);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
NS_ASSERTION(bytesWritten == aLen,
|
|
"underlying byffer couldn't handle the write");
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsEmbedStream::Available(PRUint32 *_retval)
|
|
{
|
|
return mInputStream->Available(_retval);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsEmbedStream::Read(char * aBuf, PRUint32 aCount, PRUint32 *_retval)
|
|
{
|
|
return mInputStream->Read(aBuf, aCount, _retval);
|
|
}
|
|
|
|
NS_IMETHODIMP nsEmbedStream::Close(void)
|
|
{
|
|
return mInputStream->Close();
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsEmbedStream::ReadSegments(nsWriteSegmentFun aWriter, void * aClosure,
|
|
PRUint32 aCount, PRUint32 *_retval)
|
|
{
|
|
return mInputStream->ReadSegments(aWriter, aClosure, aCount, _retval);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsEmbedStream::IsNonBlocking(PRBool *aNonBlocking)
|
|
{
|
|
return mInputStream->IsNonBlocking(aNonBlocking);
|
|
}
|