mirror of
https://github.com/mozilla/gecko-dev.git
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Initial revision.
This commit is contained in:
waterson%netscape.com
parent
cd2d3d137c
commit
1261fed0ac
414
rdf/datasource/src/nsXULDataSource.cpp
Normal file
414
rdf/datasource/src/nsXULDataSource.cpp
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@ -0,0 +1,414 @@
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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A data source that can read itself from and write itself to an
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XUL stream.
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TO DO
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-----
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1) Write code to serialize XUL back.
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*/
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#include "nsFileSpec.h"
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#include "nsFileStream.h"
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#include "nsIDTD.h"
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#include "nsIInputStream.h"
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#include "nsINameSpaceManager.h"
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#include "nsIOutputStream.h"
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#include "nsIParser.h"
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#include "nsIRDFContentSink.h"
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#include "nsIRDFCursor.h"
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#include "nsIRDFNode.h"
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#include "nsIRDFService.h"
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#include "nsIRDFDataSource.h"
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#include "nsIServiceManager.h"
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#include "nsIStreamListener.h"
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#include "nsIURL.h"
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#include "nsLayoutCID.h" // for NS_NAMESPACEMANAGER_CID.
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#include "nsParserCIID.h"
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#include "nsRDFCID.h"
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#include "nsVoidArray.h"
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#include "plstr.h"
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#include "prio.h"
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#include "prthread.h"
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#include "rdfutil.h"
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////////////////////////////////////////////////////////////////////////
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static NS_DEFINE_IID(kIDTDIID, NS_IDTD_IID);
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static NS_DEFINE_IID(kIInputStreamIID, NS_IINPUTSTREAM_IID);
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static NS_DEFINE_IID(kINameSpaceManagerIID, NS_INAMESPACEMANAGER_IID);
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static NS_DEFINE_IID(kIOutputStreamIID, NS_IOUTPUTSTREAM_IID);
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static NS_DEFINE_IID(kIParserIID, NS_IPARSER_IID);
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static NS_DEFINE_IID(kIRDFContentSinkIID, NS_IRDFCONTENTSINK_IID);
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static NS_DEFINE_IID(kIRDFDataSourceIID, NS_IRDFDATASOURCE_IID);
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static NS_DEFINE_IID(kIRDFLiteralIID, NS_IRDFLITERAL_IID);
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static NS_DEFINE_IID(kIRDFResourceIID, NS_IRDFRESOURCE_IID);
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static NS_DEFINE_IID(kIRDFServiceIID, NS_IRDFSERVICE_IID);
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static NS_DEFINE_IID(kIStreamListenerIID, NS_ISTREAMLISTENER_IID);
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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static NS_DEFINE_CID(kNameSpaceManagerCID, NS_NAMESPACEMANAGER_CID);
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static NS_DEFINE_CID(kParserCID, NS_PARSER_IID); // XXX
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static NS_DEFINE_CID(kRDFInMemoryDataSourceCID, NS_RDFINMEMORYDATASOURCE_CID);
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static NS_DEFINE_CID(kRDFContentSinkCID, NS_RDFCONTENTSINK_CID);
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static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
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static NS_DEFINE_CID(kWellFormedDTDCID, NS_WELLFORMEDDTD_CID);
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////////////////////////////////////////////////////////////////////////
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// Vocabulary stuff
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#include "rdf.h"
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DEFINE_RDF_VOCAB(RDF_NAMESPACE_URI, RDF, instanceOf);
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DEFINE_RDF_VOCAB(RDF_NAMESPACE_URI, RDF, nextVal);
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////////////////////////////////////////////////////////////////////////
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// XULDataSourceImpl
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class XULDataSourceImpl : public nsIRDFDataSource
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{
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protected:
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struct NameSpaceMap {
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nsString URI;
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nsIAtom* Prefix;
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NameSpaceMap* Next;
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};
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nsIRDFDataSource* mInner;
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PRBool mIsSynchronous; // true if the document should be loaded synchronously
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PRBool mIsWritable; // true if the document can be written back
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PRBool mIsDirty; // true if the document should be written back
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nsVoidArray mObservers;
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char** mNamedDataSourceURIs;
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PRInt32 mNumNamedDataSourceURIs;
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nsIURL** mCSSStyleSheetURLs;
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PRInt32 mNumCSSStyleSheetURLs;
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nsIRDFResource* mRootResource;
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PRBool mIsLoading; // true while the document is loading
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NameSpaceMap* mNameSpaces;
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nsID mContentModelBuilderCID;
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public:
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XULDataSourceImpl(void);
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virtual ~XULDataSourceImpl(void);
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// nsISupports
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NS_DECL_ISUPPORTS
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// nsIRDFDataSource
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NS_IMETHOD Init(const char* uri);
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NS_IMETHOD GetURI(const char* *uri) const {
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return mInner->GetURI(uri);
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}
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NS_IMETHOD GetSource(nsIRDFResource* property,
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nsIRDFNode* target,
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PRBool tv,
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nsIRDFResource** source) {
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return mInner->GetSource(property, target, tv, source);
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}
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NS_IMETHOD GetSources(nsIRDFResource* property,
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nsIRDFNode* target,
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PRBool tv,
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nsIRDFAssertionCursor** sources) {
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return mInner->GetSources(property, target, tv, sources);
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}
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NS_IMETHOD GetTarget(nsIRDFResource* source,
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nsIRDFResource* property,
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PRBool tv,
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nsIRDFNode** target) {
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return mInner->GetTarget(source, property, tv, target);
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}
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NS_IMETHOD GetTargets(nsIRDFResource* source,
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nsIRDFResource* property,
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PRBool tv,
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nsIRDFAssertionCursor** targets) {
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return mInner->GetTargets(source, property, tv, targets);
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}
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NS_IMETHOD Assert(nsIRDFResource* source,
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nsIRDFResource* property,
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nsIRDFNode* target,
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PRBool tv) {
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return mInner->Assert(source, property, target, tv);;
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}
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NS_IMETHOD Unassert(nsIRDFResource* source,
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nsIRDFResource* property,
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nsIRDFNode* target) {
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return mInner->Unassert(source, property, target);
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}
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NS_IMETHOD HasAssertion(nsIRDFResource* source,
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nsIRDFResource* property,
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nsIRDFNode* target,
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PRBool tv,
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PRBool* hasAssertion) {
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return mInner->HasAssertion(source, property, target, tv, hasAssertion);
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}
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NS_IMETHOD AddObserver(nsIRDFObserver* n) {
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return mInner->AddObserver(n);
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}
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NS_IMETHOD RemoveObserver(nsIRDFObserver* n) {
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return mInner->RemoveObserver(n);
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}
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NS_IMETHOD ArcLabelsIn(nsIRDFNode* node,
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nsIRDFArcsInCursor** labels) {
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return mInner->ArcLabelsIn(node, labels);
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}
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NS_IMETHOD ArcLabelsOut(nsIRDFResource* source,
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nsIRDFArcsOutCursor** labels) {
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return mInner->ArcLabelsOut(source, labels);
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}
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NS_IMETHOD GetAllResources(nsIRDFResourceCursor** aCursor) {
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return mInner->GetAllResources(aCursor);
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}
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NS_IMETHOD Flush(void);
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NS_IMETHOD IsCommandEnabled(const char* aCommand,
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nsIRDFResource* aCommandTarget,
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PRBool* aResult) {
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return mInner->IsCommandEnabled(aCommand, aCommandTarget, aResult);
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}
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NS_IMETHOD DoCommand(const char* aCommand,
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nsIRDFResource* aCommandTarget) {
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// XXX Uh oh, this could cause problems wrt. the "dirty" flag
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// if it changes the in-memory store's internal state.
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return mInner->DoCommand(aCommand, aCommandTarget);
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}
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};
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////////////////////////////////////////////////////////////////////////
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nsresult
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NS_NewXULDataSource(nsIRDFDataSource** result)
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{
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XULDataSourceImpl* ds = new XULDataSourceImpl();
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if (! ds)
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return NS_ERROR_NULL_POINTER;
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*result = ds;
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NS_ADDREF(*result);
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return NS_OK;
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}
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XULDataSourceImpl::XULDataSourceImpl(void)
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: mIsSynchronous(PR_FALSE),
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mIsWritable(PR_TRUE),
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mIsDirty(PR_FALSE),
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mNamedDataSourceURIs(nsnull),
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mNumNamedDataSourceURIs(0),
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mCSSStyleSheetURLs(nsnull),
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mNumCSSStyleSheetURLs(0),
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mIsLoading(PR_FALSE),
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mNameSpaces(nsnull)
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{
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nsresult rv;
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if (NS_FAILED(rv = nsRepository::CreateInstance(kRDFInMemoryDataSourceCID,
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nsnull,
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kIRDFDataSourceIID,
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(void**) &mInner)))
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PR_ASSERT(0);
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NS_INIT_REFCNT();
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}
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XULDataSourceImpl::~XULDataSourceImpl(void)
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{
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nsIRDFService* rdfService;
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if (NS_SUCCEEDED(nsServiceManager::GetService(kRDFServiceCID,
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kIRDFServiceIID,
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(nsISupports**) &rdfService))) {
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rdfService->UnregisterDataSource(this);
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nsServiceManager::ReleaseService(kRDFServiceCID, rdfService);
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}
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Flush();
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while (mNumNamedDataSourceURIs-- > 0) {
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delete mNamedDataSourceURIs[mNumNamedDataSourceURIs];
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}
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delete mNamedDataSourceURIs;
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while (mNumCSSStyleSheetURLs-- > 0) {
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NS_RELEASE(mCSSStyleSheetURLs[mNumCSSStyleSheetURLs]);
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}
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delete mCSSStyleSheetURLs;
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while (mNameSpaces) {
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NameSpaceMap* doomed = mNameSpaces;
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mNameSpaces = mNameSpaces->Next;
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NS_RELEASE(doomed->Prefix);
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delete doomed;
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}
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}
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NS_IMPL_ADDREF(XULDataSourceImpl);
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NS_IMPL_RELEASE(XULDataSourceImpl);
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NS_IMETHODIMP
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XULDataSourceImpl::QueryInterface(REFNSIID iid, void** result)
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{
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if (! result)
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return NS_ERROR_NULL_POINTER;
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if (iid.Equals(kISupportsIID) ||
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iid.Equals(kIRDFDataSourceIID)) {
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*result = NS_STATIC_CAST(nsIRDFDataSource*, this);
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NS_ADDREF(this);
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return NS_OK;
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}
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else {
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*result = nsnull;
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return NS_NOINTERFACE;
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}
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}
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NS_IMETHODIMP
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XULDataSourceImpl::Init(const char* uri)
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{
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static const char kFileURIPrefix[] = "file:";
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static const char kResourceURIPrefix[] = "resource:";
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NS_PRECONDITION(mInner != nsnull, "not initialized");
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if (! mInner)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv;
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// XXX this is a hack: any "file:" URI is considered writable. All
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// others are considered read-only.
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if (PL_strncmp(uri, kFileURIPrefix, sizeof(kFileURIPrefix) - 1) != 0)
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mIsWritable = PR_FALSE;
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nsIRDFService* rdfService = nsnull;
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nsINameSpaceManager* ns = nsnull;
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nsIRDFContentSink* sink = nsnull;
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nsIParser* parser = nsnull;
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nsIDTD* dtd = nsnull;
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nsIStreamListener* lsnr = nsnull;
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nsIURL* url = nsnull;
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if (NS_FAILED(rv = NS_NewURL(&url, uri)))
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goto done;
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if (NS_FAILED(rv = mInner->Init(uri)))
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goto done;
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if (NS_FAILED(rv = nsServiceManager::GetService(kRDFServiceCID,
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kIRDFServiceIID,
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(nsISupports**) &rdfService)))
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goto done;
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if (NS_FAILED(rv = rdfService->RegisterDataSource(this)))
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goto done;
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if (NS_FAILED(rv = nsRepository::CreateInstance(kNameSpaceManagerCID,
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nsnull,
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kINameSpaceManagerIID,
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(void**) &ns)))
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goto done;
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#if 0
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if (NS_FAILED(rv = nsRepository::CreateInstance(kXULContentSinkCID,
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nsnull,
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kIXULContentSinkIID,
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(void**) &sink)))
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goto done;
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if (NS_FAILED(sink->Init(url, ns)))
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goto done;
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// We set the content sink's data source directly to our in-memory
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// store. This allows the initial content to be generated "directly".
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if (NS_FAILED(rv = sink->SetDataSource(this)))
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goto done;
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#endif
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if (NS_FAILED(rv = nsRepository::CreateInstance(kParserCID,
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nsnull,
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kIParserIID,
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(void**) &parser)))
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goto done;
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parser->SetContentSink(sink);
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// XXX this should eventually be kRDFDTDCID (oh boy, that's a
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// pretty identifier). The RDF DTD will be a much more
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// RDF-resilient parser.
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if (NS_FAILED(rv = nsRepository::CreateInstance(kWellFormedDTDCID,
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nsnull,
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kIDTDIID,
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(void**) &dtd)))
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goto done;
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parser->RegisterDTD(dtd);
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if (NS_FAILED(rv = parser->QueryInterface(kIStreamListenerIID, (void**) &lsnr)))
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goto done;
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if (NS_FAILED(parser->Parse(url)))
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goto done;
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rv = NS_OpenURL(url, lsnr);
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done:
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NS_IF_RELEASE(lsnr);
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NS_IF_RELEASE(dtd);
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NS_IF_RELEASE(parser);
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NS_IF_RELEASE(sink);
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if (rdfService) {
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nsServiceManager::ReleaseService(kRDFServiceCID, rdfService);
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rdfService = nsnull;
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}
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NS_IF_RELEASE(url);
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return rv;
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}
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NS_IMETHODIMP
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XULDataSourceImpl::Flush(void)
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{
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NS_NOTYETIMPLEMENTED("write me!");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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Reference in New Issue
Block a user