forked from mirrors/gecko-dev
272 lines
7.3 KiB
C++
272 lines
7.3 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Christopher Blizzard. Portions created by Christopher Blizzard are Copyright (C) Christopher Blizzard. All Rights Reserved.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Christopher Blizzard <blizzard@mozilla.org>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <nsIPipe.h>
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#include <nsIInputStream.h>
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#include <nsIOutputStream.h>
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#include <nsIContentViewerContainer.h>
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#include <nsIDocumentLoaderFactory.h>
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#include <nsNetUtil.h>
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#include <prmem.h>
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#include "nsXPCOMCID.h"
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#include "nsICategoryManager.h"
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#include "nsIContentViewer.h"
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#include "nsEmbedStream.h"
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#include "nsReadableUtils.h"
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// nsIInputStream interface
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NS_IMPL_ISUPPORTS1(nsEmbedStream, nsIInputStream)
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nsEmbedStream::nsEmbedStream()
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{
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mOwner = nsnull;
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mOffset = 0;
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mDoingStream = PR_FALSE;
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}
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nsEmbedStream::~nsEmbedStream()
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{
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}
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void
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nsEmbedStream::InitOwner(nsIWebBrowser *aOwner)
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{
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mOwner = aOwner;
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}
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NS_METHOD
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nsEmbedStream::Init(void)
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{
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nsresult rv = NS_OK;
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nsCOMPtr<nsIInputStream> bufInStream;
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nsCOMPtr<nsIOutputStream> bufOutStream;
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rv = NS_NewPipe(getter_AddRefs(bufInStream),
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getter_AddRefs(bufOutStream));
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if (NS_FAILED(rv)) return rv;
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mInputStream = bufInStream;
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mOutputStream = bufOutStream;
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return NS_OK;
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}
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NS_METHOD
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nsEmbedStream::OpenStream(nsIURI *aBaseURI, const nsACString& aContentType)
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{
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NS_ENSURE_ARG_POINTER(aBaseURI);
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NS_ENSURE_TRUE(IsASCII(aContentType), NS_ERROR_INVALID_ARG);
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// if we're already doing a stream, return an error
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if (mDoingStream)
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return NS_ERROR_IN_PROGRESS;
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// set our state
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mDoingStream = PR_TRUE;
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// initialize our streams
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nsresult rv = Init();
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if (NS_FAILED(rv))
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return rv;
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// get the viewer container
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nsCOMPtr<nsIContentViewerContainer> viewerContainer;
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viewerContainer = do_GetInterface(mOwner);
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// create a new load group
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rv = NS_NewLoadGroup(getter_AddRefs(mLoadGroup), nsnull);
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if (NS_FAILED(rv))
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return rv;
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// create a new input stream channel
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rv = NS_NewInputStreamChannel(getter_AddRefs(mChannel), aBaseURI,
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static_cast<nsIInputStream *>(this),
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aContentType);
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if (NS_FAILED(rv))
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return rv;
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// set the channel's load group
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rv = mChannel->SetLoadGroup(mLoadGroup);
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if (NS_FAILED(rv))
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return rv;
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// find a document loader for this content type
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const nsCString& flatContentType = PromiseFlatCString(aContentType);
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nsXPIDLCString docLoaderContractID;
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nsCOMPtr<nsICategoryManager> catMan(do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv));
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if (NS_FAILED(rv))
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return rv;
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rv = catMan->GetCategoryEntry("Gecko-Content-Viewers",
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flatContentType.get(),
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getter_Copies(docLoaderContractID));
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// Note: When the category manager does not find an entry for the requested
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// contract ID, it will return NS_ERROR_NOT_AVAILABLE. This conveniently
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// matches what this method wants to return in that case.
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory;
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docLoaderFactory = do_GetService(docLoaderContractID.get(), &rv);
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if (NS_FAILED(rv))
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return rv;
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// ok, create an instance of the content viewer for that command and
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// mime type
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nsCOMPtr<nsIContentViewer> contentViewer;
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rv = docLoaderFactory->CreateInstance("view", mChannel, mLoadGroup,
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flatContentType.get(), viewerContainer,
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nsnull,
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getter_AddRefs(mStreamListener),
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getter_AddRefs(contentViewer));
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if (NS_FAILED(rv))
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return rv;
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// set the container viewer container for this content view
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rv = contentViewer->SetContainer(viewerContainer);
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if (NS_FAILED(rv))
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return rv;
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// embed this sucker
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rv = viewerContainer->Embed(contentViewer, "view", nsnull);
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if (NS_FAILED(rv))
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return rv;
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// start our request
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rv = mStreamListener->OnStartRequest(mChannel, NULL);
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if (NS_FAILED(rv))
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return rv;
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return NS_OK;
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}
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NS_METHOD
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nsEmbedStream::AppendToStream(const PRUint8 *aData, PRUint32 aLen)
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{
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nsresult rv;
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// append the data
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rv = Append(aData, aLen);
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if (NS_FAILED(rv))
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return rv;
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// notify our listeners
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rv = mStreamListener->OnDataAvailable(mChannel,
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NULL,
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static_cast<nsIInputStream *>(this),
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mOffset, /* offset */
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aLen); /* len */
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// move our counter
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mOffset += aLen;
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if (NS_FAILED(rv))
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return rv;
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return NS_OK;
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}
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NS_METHOD
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nsEmbedStream::CloseStream(void)
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{
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nsresult rv = NS_OK;
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// NS_ENSURE_STATE returns NS_ERROR_UNEXPECTED if the condition isn't
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// satisfied; this is exactly what we want to return.
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NS_ENSURE_STATE(mDoingStream);
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mDoingStream = PR_FALSE;
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rv = mStreamListener->OnStopRequest(mChannel, NULL, NS_OK);
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if (NS_FAILED(rv))
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return rv;
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mLoadGroup = nsnull;
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mChannel = nsnull;
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mStreamListener = nsnull;
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mOffset = 0;
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return rv;
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}
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NS_METHOD
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nsEmbedStream::Append(const PRUint8 *aData, PRUint32 aLen)
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{
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PRUint32 bytesWritten = 0;
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nsresult rv = mOutputStream->Write(reinterpret_cast<const char*>(aData),
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aLen, &bytesWritten);
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if (NS_FAILED(rv))
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return rv;
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NS_ASSERTION(bytesWritten == aLen,
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"underlying byffer couldn't handle the write");
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return rv;
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}
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NS_IMETHODIMP
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nsEmbedStream::Available(PRUint32 *_retval)
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{
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return mInputStream->Available(_retval);
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}
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NS_IMETHODIMP
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nsEmbedStream::Read(char * aBuf, PRUint32 aCount, PRUint32 *_retval)
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{
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return mInputStream->Read(aBuf, aCount, _retval);
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}
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NS_IMETHODIMP nsEmbedStream::Close(void)
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{
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return mInputStream->Close();
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}
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NS_IMETHODIMP
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nsEmbedStream::ReadSegments(nsWriteSegmentFun aWriter, void * aClosure,
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PRUint32 aCount, PRUint32 *_retval)
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{
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return mInputStream->ReadSegments(aWriter, aClosure, aCount, _retval);
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}
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NS_IMETHODIMP
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nsEmbedStream::IsNonBlocking(PRBool *aNonBlocking)
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{
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return mInputStream->IsNonBlocking(aNonBlocking);
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}
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