зеркало из https://github.com/mozilla/pjs.git
More about XML document loading using XBL.
This commit is contained in:
hyatt%netscape.com
Родитель
effdd1b9c6
Коммит
f987db70e4
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@ -13,10 +13,13 @@
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#include "plstr.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIXMLContentSink.h"
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#include "nsLayoutCID.h"
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// Static IIDs/CIDs. Try to minimize these.
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static NS_DEFINE_CID(kNameSpaceManagerCID, NS_NAMESPACEMANAGER_CID);
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static NS_DEFINE_CID(kXMLDocumentCID, NS_XMLDOCUMENT_CID);
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static NS_DEFINE_CID(kParserCID, NS_PARSER_IID); // XXX What's up with this???
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// nsProxyStream
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// A helper class used for synchronous parsing of URLs.
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@ -251,7 +254,92 @@ NS_IMETHODIMP nsXBLService::GetBindingDocument(nsCAutoString& aURLStr, nsIDocume
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NS_IMETHODIMP
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nsXBLService::FetchBindingDocument(nsIURI* aURI, nsIDocument** aResult)
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{
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// Initialize our out pointer to nsnull
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*aResult = nsnull;
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// Create the XML document
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nsCOMPtr<nsIDocument> doc;
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nsresult rv = nsComponentManager::CreateInstance(kXMLDocumentCID, nsnull,
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nsIDocument::GetIID(),
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getter_AddRefs(doc));
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if (NS_FAILED(rv)) return rv;
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// Now we have to synchronously load the binding file.
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// Create an XML content sink and a parser. Then kick off a load for
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// the overlay.
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nsCOMPtr<nsIChannel> channel;
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rv = NS_OpenURI(getter_AddRefs(channel), aURI, nsnull);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIXMLContentSink> sink;
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NS_NewXMLContentSink(getter_AddRefs(sink), doc, aURI, nsnull);
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nsCOMPtr<nsIParser> parser;
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rv = nsComponentManager::CreateInstance(kParserCID,
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nsnull,
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NS_GET_IID(nsIParser),
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getter_AddRefs(parser));
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NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create parser");
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if (NS_FAILED(rv)) return rv;
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parser->SetCommand("view");
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nsAutoString utf8("UTF-8");
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parser->SetDocumentCharset(utf8, kCharsetFromDocTypeDefault);
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parser->SetContentSink(sink); // grabs a reference to the parser
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// Now do a blocking synchronous parse of the file.
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nsCOMPtr<nsIStreamListener> listener = do_QueryInterface(parser, &rv);
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if (NS_FAILED(rv)) return rv;
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rv = parser->Parse(aURI);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIInputStream> in;
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PRUint32 sourceOffset = 0;
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rv = channel->OpenInputStream(0, -1, getter_AddRefs(in));
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// If we couldn't open the channel, then just return.
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if (NS_FAILED(rv)) return NS_OK;
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NS_ASSERTION(in != nsnull, "no input stream");
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if (! in) return NS_ERROR_FAILURE;
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rv = NS_ERROR_OUT_OF_MEMORY;
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nsProxyStream* proxy = new nsProxyStream();
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if (! proxy)
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return NS_ERROR_FAILURE;
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listener->OnStartRequest(channel, nsnull);
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while (PR_TRUE) {
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char buf[1024];
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PRUint32 readCount;
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if (NS_FAILED(rv = in->Read(buf, sizeof(buf), &readCount)))
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break; // error
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if (readCount == 0)
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break; // eof
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proxy->SetBuffer(buf, readCount);
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rv = listener->OnDataAvailable(channel, nsnull, proxy, sourceOffset, readCount);
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sourceOffset += readCount;
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if (NS_FAILED(rv))
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break;
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}
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listener->OnStopRequest(channel, nsnull, NS_OK, nsnull);
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// don't leak proxy!
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proxy->Close();
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delete proxy;
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// The document is parsed. We now have a prototype document.
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// Everything worked, so we can just hand this back now.
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*aResult = doc;
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NS_IF_ADDREF(*aResult);
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return NS_OK;
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}
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@ -13,10 +13,13 @@
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#include "plstr.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIXMLContentSink.h"
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#include "nsLayoutCID.h"
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// Static IIDs/CIDs. Try to minimize these.
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static NS_DEFINE_CID(kNameSpaceManagerCID, NS_NAMESPACEMANAGER_CID);
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static NS_DEFINE_CID(kXMLDocumentCID, NS_XMLDOCUMENT_CID);
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static NS_DEFINE_CID(kParserCID, NS_PARSER_IID); // XXX What's up with this???
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// nsProxyStream
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// A helper class used for synchronous parsing of URLs.
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@ -251,7 +254,92 @@ NS_IMETHODIMP nsXBLService::GetBindingDocument(nsCAutoString& aURLStr, nsIDocume
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NS_IMETHODIMP
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nsXBLService::FetchBindingDocument(nsIURI* aURI, nsIDocument** aResult)
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{
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// Initialize our out pointer to nsnull
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*aResult = nsnull;
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// Create the XML document
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nsCOMPtr<nsIDocument> doc;
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nsresult rv = nsComponentManager::CreateInstance(kXMLDocumentCID, nsnull,
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nsIDocument::GetIID(),
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getter_AddRefs(doc));
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if (NS_FAILED(rv)) return rv;
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// Now we have to synchronously load the binding file.
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// Create an XML content sink and a parser. Then kick off a load for
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// the overlay.
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nsCOMPtr<nsIChannel> channel;
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rv = NS_OpenURI(getter_AddRefs(channel), aURI, nsnull);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIXMLContentSink> sink;
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NS_NewXMLContentSink(getter_AddRefs(sink), doc, aURI, nsnull);
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nsCOMPtr<nsIParser> parser;
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rv = nsComponentManager::CreateInstance(kParserCID,
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nsnull,
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NS_GET_IID(nsIParser),
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getter_AddRefs(parser));
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NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create parser");
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if (NS_FAILED(rv)) return rv;
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parser->SetCommand("view");
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nsAutoString utf8("UTF-8");
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parser->SetDocumentCharset(utf8, kCharsetFromDocTypeDefault);
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parser->SetContentSink(sink); // grabs a reference to the parser
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// Now do a blocking synchronous parse of the file.
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nsCOMPtr<nsIStreamListener> listener = do_QueryInterface(parser, &rv);
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if (NS_FAILED(rv)) return rv;
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rv = parser->Parse(aURI);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIInputStream> in;
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PRUint32 sourceOffset = 0;
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rv = channel->OpenInputStream(0, -1, getter_AddRefs(in));
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// If we couldn't open the channel, then just return.
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if (NS_FAILED(rv)) return NS_OK;
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NS_ASSERTION(in != nsnull, "no input stream");
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if (! in) return NS_ERROR_FAILURE;
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rv = NS_ERROR_OUT_OF_MEMORY;
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nsProxyStream* proxy = new nsProxyStream();
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if (! proxy)
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return NS_ERROR_FAILURE;
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listener->OnStartRequest(channel, nsnull);
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while (PR_TRUE) {
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char buf[1024];
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PRUint32 readCount;
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if (NS_FAILED(rv = in->Read(buf, sizeof(buf), &readCount)))
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break; // error
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if (readCount == 0)
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break; // eof
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proxy->SetBuffer(buf, readCount);
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rv = listener->OnDataAvailable(channel, nsnull, proxy, sourceOffset, readCount);
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sourceOffset += readCount;
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if (NS_FAILED(rv))
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break;
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}
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listener->OnStopRequest(channel, nsnull, NS_OK, nsnull);
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// don't leak proxy!
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proxy->Close();
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delete proxy;
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// The document is parsed. We now have a prototype document.
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// Everything worked, so we can just hand this back now.
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*aResult = doc;
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NS_IF_ADDREF(*aResult);
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return NS_OK;
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}
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