3ae31acebc
36148 - Mlk [ r= rickg ] nsParser::Parse(string) 39713 - Crash caused by an uninitialized ref. counter 39466 - Handling XML error before calling DidBuildModel(). r=nisheeth a=waterson git-svn-id: svn://10.0.0.236/trunk@70609 18797224-902f-48f8-a5cc-f745e15eee43
600 lines
16 KiB
C++
600 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/**
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* MODULE NOTES:
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* @update gess 4/8/98
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*
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*
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*/
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#include "nsIDTDDebug.h"
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#include "nsExpatDTD.h"
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#include "nsCRT.h"
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#include "nsParser.h"
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#include "nsScanner.h"
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#include "nsIParser.h"
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#include "nsTokenHandler.h"
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#include "nsDTDUtils.h"
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#include "nsIContentSink.h"
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#include "nsIHTMLContentSink.h"
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#include "nsExpatTokenizer.h"
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#include "nsHTMLEntities.h"
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#include "prenv.h" //this is here for debug reasons...
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#include "prtypes.h" //this is here for debug reasons...
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#include "prio.h"
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#include "plstr.h"
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#include "prlog.h"
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#include "prmem.h"
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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static NS_DEFINE_IID(kIDTDIID, NS_IDTD_IID);
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static NS_DEFINE_IID(kClassIID, NS_EXPAT_DTD_IID);
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/**
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* This method gets called as part of our COM-like interfaces.
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* Its purpose is to create an interface to parser object
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* of some type.
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*
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* @update gess 4/8/98
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* @param nsIID id of object to discover
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* @param aInstancePtr ptr to newly discovered interface
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* @return NS_xxx result code
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*/
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nsresult nsExpatDTD::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if(aIID.Equals(kISupportsIID)) { //do IUnknown...
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*aInstancePtr = (nsIDTD*)(this);
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}
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else if(aIID.Equals(kIDTDIID)) { //do IParser base class...
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*aInstancePtr = (nsIDTD*)(this);
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}
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else if(aIID.Equals(kClassIID)) { //do this class...
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*aInstancePtr = (nsExpatDTD*)(this);
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}
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else {
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*aInstancePtr=0;
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return NS_NOINTERFACE;
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}
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NS_ADDREF_THIS();
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return NS_OK;
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}
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/**
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* This method is defined in nsIParser. It is used to
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* cause the COM-like construction of an nsParser.
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*
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* @update gess 4/8/98
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* @param nsIParser** ptr to newly instantiated parser
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* @return NS_xxx error result
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*/
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NS_HTMLPARS nsresult NS_New_Expat_DTD(nsIDTD** aInstancePtrResult) {
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nsExpatDTD* it = new nsExpatDTD();
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if (it == 0) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return it->QueryInterface(kClassIID, (void **) aInstancePtrResult);
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}
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NS_IMPL_ADDREF(nsExpatDTD)
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NS_IMPL_RELEASE(nsExpatDTD)
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/**
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* Default constructor
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*
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* @update gess 4/9/98
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* @param
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* @return
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*/
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nsExpatDTD::nsExpatDTD() {
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NS_INIT_REFCNT();
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mExpatParser=0;
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mParser=0;
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mSink=0;
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mLineNumber=0;
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mTokenizer=0;
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}
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/**
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* Default destructor
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*
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* @update gess 4/9/98
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* @param
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* @return
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*/
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nsExpatDTD::~nsExpatDTD(){
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mParser=0; //just to prove we destructed...
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NS_IF_RELEASE(mTokenizer);
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if (mExpatParser)
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XML_ParserFree(mExpatParser);
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}
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/**
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*
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* @update gess1/8/99
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* @param
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* @return
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*/
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const nsIID& nsExpatDTD::GetMostDerivedIID(void) const{
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return kClassIID;
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}
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/**
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* Call this method if you want the DTD to construct a fresh
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* instance of itself.
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* @update gess7/23/98
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* @param
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* @return
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*/
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nsresult nsExpatDTD::CreateNewInstance(nsIDTD** aInstancePtrResult){
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return NS_New_Expat_DTD(aInstancePtrResult);
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}
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/**
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* This method is called to determine if the given DTD can parse
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* a document in a given source-type.
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* NOTE: Parsing always assumes that the end result will involve
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* storing the result in the main content model.
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* @update gess6/24/98
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* @param
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* @return TRUE if this DTD can satisfy the request; FALSE otherwise.
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*/
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eAutoDetectResult nsExpatDTD::CanParse(CParserContext& aParserContext,nsString& aBuffer, PRInt32 aVersion){
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eAutoDetectResult result=eUnknownDetect;
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if(eViewSource!=aParserContext.mParserCommand) {
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if(aParserContext.mMimeType.EqualsWithConversion(kXMLTextContentType) ||
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aParserContext.mMimeType.EqualsWithConversion(kRDFTextContentType) ||
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aParserContext.mMimeType.EqualsWithConversion(kXULTextContentType)) {
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result=eValidDetect;
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}
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else {
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if(-1<aBuffer.Find("<?xml ")) {
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if(0==aParserContext.mMimeType.Length()) {
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aParserContext.SetMimeType( NS_ConvertToString(kXMLTextContentType) );
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}
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result=eValidDetect;
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}
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}
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}
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return result;
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}
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/**
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* The parser uses a code sandwich to wrap the parsing process. Before
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* the process begins, WillBuildModel() is called. Afterwards the parser
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* calls DidBuildModel().
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* @update rickg 03.20.2000
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* @param aParserContext
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* @param aSink
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* @return error code (almost always 0)
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*/
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nsresult nsExpatDTD::WillBuildModel( const CParserContext& aParserContext,nsIContentSink* aSink){
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nsresult result=NS_OK;
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mFilename=aParserContext.mScanner->GetFilename();
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mSink=aSink;
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if((!aParserContext.mPrevContext) && (mSink)) {
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mLineNumber=0;
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result = mSink->WillBuildModel();
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}
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return result;
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}
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/**
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* The parser uses a code sandwich to wrap the parsing process. Before
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* the process begins, WillBuildModel() is called. Afterwards the parser
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* calls DidBuildModel().
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* @update gess 1/4/99
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* @param aFilename is the name of the file being parsed.
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* @return error code (almost always 0)
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*/
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NS_IMETHODIMP nsExpatDTD::BuildModel(nsIParser* aParser,nsITokenizer* aTokenizer,nsITokenObserver* anObserver,nsIContentSink* aSink) {
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nsresult result=NS_OK;
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if(aTokenizer) {
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nsITokenizer* oldTokenizer=mTokenizer;
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mTokenizer=aTokenizer;
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nsITokenRecycler* theRecycler=aTokenizer->GetTokenRecycler();
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while(NS_OK==result){
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CToken* theToken=mTokenizer->PopToken();
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if(theToken) {
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result=HandleToken(theToken,aParser);
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if(NS_SUCCEEDED(result)) {
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theRecycler->RecycleToken(theToken);
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}
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else if(NS_ERROR_HTMLPARSER_BLOCK!=result){
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mTokenizer->PushTokenFront(theToken);
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}
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// theRootDTD->Verify(kEmptyString,aParser);
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}
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else break;
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}//while
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mTokenizer=oldTokenizer;
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}
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else result=NS_ERROR_HTMLPARSER_BADTOKENIZER;
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return result;
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}
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/**
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*
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* @update gess5/18/98
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* @param
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* @return
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*/
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NS_IMETHODIMP nsExpatDTD::DidBuildModel(nsresult anErrorCode,PRBool aNotifySink,nsIParser* aParser,nsIContentSink* aSink){
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nsresult result= NS_OK;
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//ADD CODE HERE TO CLOSE OPEN CONTAINERS...
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if(aParser){
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mSink=aParser->GetContentSink();
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if((aNotifySink) && (mSink)) {
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result = mSink->DidBuildModel(1);
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}
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}
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return result;
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}
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/**
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*
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* @update gess8/4/98
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* @param
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* @return
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*/
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nsITokenRecycler* nsExpatDTD::GetTokenRecycler(void){
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nsITokenizer* theTokenizer=0;
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nsresult result=GetTokenizer(theTokenizer);
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if (NS_SUCCEEDED(result)) {
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return theTokenizer->GetTokenRecycler();
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}
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return 0;
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}
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/**
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* Use this id you want to stop the building content model
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* --------------[ Sets DTD to STOP mode ]----------------
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* It's recommended to use this method in accordance with
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* the parser's terminate() method.
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*
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* @update harishd 07/22/99
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* @param
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* @return
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*/
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nsresult nsExpatDTD::Terminate(nsIParser* aParser)
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{
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return NS_ERROR_HTMLPARSER_STOPPARSING;
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}
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/**
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* Sets up the callbacks for the expat parser
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* @update nra 2/24/99
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* @param none
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* @return none
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*/
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void nsExpatDTD::SetupExpatCallbacks(void) {
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if (mExpatParser) {
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XML_SetElementHandler(mExpatParser, HandleStartElement, HandleEndElement);
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XML_SetCharacterDataHandler(mExpatParser, HandleCharacterData);
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XML_SetProcessingInstructionHandler(mExpatParser, HandleProcessingInstruction);
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// XML_SetDefaultHandler(mExpatParser, NULL);
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// XML_SetUnparsedEntityDeclHandler(mExpatParser, NULL);
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XML_SetNotationDeclHandler(mExpatParser, HandleNotationDecl);
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// XML_SetExternalEntityRefHandler(mExpatParser, NULL);
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// XML_SetUnknownEncodingHandler(mExpatParser, NULL, NULL);
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}
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}
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/**
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* Retrieve the preferred tokenizer for use by this DTD.
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* @update gess12/28/98
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* @param none
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* @return ptr to tokenizer
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*/
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nsresult nsExpatDTD::GetTokenizer(nsITokenizer*& aTokenizer) {
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nsresult result=NS_OK;
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if(!mTokenizer) {
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result=NS_New_Expat_Tokenizer(&mTokenizer);
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mExpatParser = XML_ParserCreate(NULL);
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if (mExpatParser) {
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SetupExpatCallbacks();
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}
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}
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aTokenizer=mTokenizer;
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return result;
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}
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/**
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*
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* @update gess5/18/98
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* @param
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* @return
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*/
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NS_IMETHODIMP nsExpatDTD::WillResumeParse(void){
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nsresult result = NS_OK;
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if(mSink) {
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result = mSink->WillResume();
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}
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return result;
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}
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/**
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*
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* @update gess5/18/98
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* @param
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* @return
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*/
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NS_IMETHODIMP nsExpatDTD::WillInterruptParse(void){
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nsresult result = NS_OK;
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if(mSink) {
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result = mSink->WillInterrupt();
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}
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return result;
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}
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/**
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* Called by the parser to initiate dtd verification of the
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* internal context stack.
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* @update gess 7/23/98
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* @param
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* @return
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*/
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PRBool nsExpatDTD::Verify(nsString& aURLRef,nsIParser* aParser) {
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PRBool result=PR_TRUE;
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mParser=(nsParser*)aParser;
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return result;
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}
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/**
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* Called by the parser to enable/disable dtd verification of the
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* internal context stack.
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* @update gess 7/23/98
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* @param
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* @return
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*/
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void nsExpatDTD::SetVerification(PRBool aEnabled){
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}
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/**
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* This method is called to determine whether or not a tag
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* of one type can contain a tag of another type.
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*
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* @update gess 3/25/98
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* @param aParent -- int tag of parent container
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* @param aChild -- int tag of child container
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* @return PR_TRUE if parent can contain child
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*/
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PRBool nsExpatDTD::CanContain(PRInt32 aParent,PRInt32 aChild) const{
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PRBool result=PR_TRUE;
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return result;
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}
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/**
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* Give rest of world access to our tag enums, so that CanContain(), etc,
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* become useful.
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*/
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NS_IMETHODIMP nsExpatDTD::StringTagToIntTag(nsString &aTag, PRInt32* aIntTag) const
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExpatDTD::IntTagToStringTag(PRInt32 aIntTag, nsString& aTag) const
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExpatDTD::ConvertEntityToUnicode(const nsString& aEntity, PRInt32* aUnicode) const
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{
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// XXX Needed since the XML content sink reduces entities as well
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*aUnicode = nsHTMLEntities::EntityToUnicode(aEntity);
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return NS_OK;
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}
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/**
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* This method gets called to determine whether a given
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* tag is itself a container
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*
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* @update gess 3/25/98
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* @param aTag -- tag to test for containership
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* @return PR_TRUE if given tag can contain other tags
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*/
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PRBool nsExpatDTD::IsContainer(PRInt32 aTag) const{
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PRBool result=PR_TRUE;
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return result;
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}
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/**
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*
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* @update vidur 11/12/98
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* @param aToken -- token object to be put into content model
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* @return 0 if all is well; non-zero is an error
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*/
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NS_IMETHODIMP nsExpatDTD::HandleToken(CToken* aToken,nsIParser* aParser) {
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nsresult result=NS_OK;
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CHTMLToken* theToken= (CHTMLToken*)(aToken);
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eHTMLTokenTypes theType= (eHTMLTokenTypes)theToken->GetTokenType();
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mParser=(nsParser*)aParser;
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mSink=aParser->GetContentSink();
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nsCParserNode theNode(theToken,mLineNumber);
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switch(theType) {
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case eToken_newline:
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mLineNumber++; //now fall through
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case eToken_entity:
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case eToken_whitespace:
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case eToken_text:
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case eToken_cdatasection:
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result=mSink->AddLeaf(theNode);
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break;
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case eToken_comment:
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result=mSink->AddComment(theNode);
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break;
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case eToken_instruction:
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result=mSink->AddProcessingInstruction(theNode);
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break;
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case eToken_start:
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{
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PRInt16 attrCount=aToken->GetAttributeCount();
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if(0<attrCount){ //go collect the attributes...
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int attr=0;
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for(attr=0;attr<attrCount;attr++){
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CToken* theAttrToken=mTokenizer->PeekToken();
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if(theAttrToken) {
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eHTMLTokenTypes theAttrType=eHTMLTokenTypes(theAttrToken->GetTokenType());
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if(eToken_attribute==theAttrType){
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mTokenizer->PopToken(); //pop it for real...
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theNode.AddAttribute(theAttrToken);
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}
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}
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else return kEOF;
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}
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}
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if(NS_OK==result){
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result=mSink->OpenContainer(theNode);
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if(((CStartToken*)aToken)->IsEmpty()){
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result=mSink->CloseContainer(theNode);
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}
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}
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}
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break;
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case eToken_end:
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result=mSink->CloseContainer(theNode);
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break;
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case eToken_style:
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case eToken_skippedcontent:
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default:
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result=NS_OK;
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}//switch
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return result;
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}
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nsresult nsExpatDTD::ParseXMLBuffer(const char *buffer){
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nsresult result=NS_OK;
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if (mExpatParser) {
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if (!XML_Parse(mExpatParser, buffer, strlen(buffer), PR_FALSE)) {
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// XXX Add code here to implement error propagation to the
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// content sink.
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NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::ParseXMLBuffer(): \
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Error propogation from expat not yet implemented.");
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result = NS_ERROR_FAILURE;
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}
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}
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else {
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result = NS_ERROR_FAILURE;
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}
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return result;
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}
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/***************************************/
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/* Expat Callback Functions start here */
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/***************************************/
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void nsExpatDTD::HandleStartElement(void *userData, const XML_Char *name, const XML_Char **atts)
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{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleStartElement() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleEndElement(void *userData, const XML_Char *name)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleEndElement() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleCharacterData(void *userData, const XML_Char *s, int len)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleCharacterData() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleProcessingInstruction(void *userData,
|
|
const XML_Char *target,
|
|
const XML_Char *data)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleProcessingInstruction() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleDefault(void *userData, const XML_Char *s, int len)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleDefault() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleUnparsedEntityDecl(void *userData,
|
|
const XML_Char *entityName,
|
|
const XML_Char *base,
|
|
const XML_Char *systemId,
|
|
const XML_Char *publicId,
|
|
const XML_Char *notationName)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleUnparsedEntityDecl() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleNotationDecl(void *userData,
|
|
const XML_Char *notationName,
|
|
const XML_Char *base,
|
|
const XML_Char *systemId,
|
|
const XML_Char *publicId)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleNotationDecl() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleExternalEntityRef(XML_Parser parser,
|
|
const XML_Char *openEntityNames,
|
|
const XML_Char *base,
|
|
const XML_Char *systemId,
|
|
const XML_Char *publicId)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleExternalEntityRef() not yet implemented.");
|
|
}
|
|
|
|
void nsExpatDTD::HandleUnknownEncoding(void *encodingHandlerData,
|
|
const XML_Char *name,
|
|
XML_Encoding *info)
|
|
{
|
|
NS_NOTYETIMPLEMENTED("Error: nsExpatDTD::HandleUnknownEncoding() not yet implemented.");
|
|
}
|