467 lines
12 KiB
C++
467 lines
12 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 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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* 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 "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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#ifdef XP_PC
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#include <direct.h> //this is here for debug reasons...
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#endif
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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() : nsIDTD() {
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NS_INIT_REFCNT();
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mParser=0;
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mSink=0;
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mFilename;
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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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if(mTokenizer)
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delete (nsExpatTokenizer*)mTokenizer;
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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(nsString& aContentType, nsString& aCommand, nsString& aBuffer, PRInt32 aVersion) {
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eAutoDetectResult result=eUnknownDetect;
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if(!aCommand.Equals(kViewSourceCommand)) {
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if(aContentType.Equals(kXMLTextContentType) ||
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aContentType.Equals(kRDFTextContentType) ||
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aContentType.Equals(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==aContentType.Length()) {
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aContentType = kXMLTextContentType; //only reset it if it's empty
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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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*
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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::WillBuildModel(nsString& aFilename,PRBool aNotifySink,nsIParser* aParser,nsIContentSink* aSink){
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nsresult result=NS_OK;
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mFilename=aFilename;
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if(aParser){
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mSink=aParser->GetContentSink();
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if((aNotifySink) && (mSink)) {
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mLineNumber=0;
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result = mSink->WillBuildModel();
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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 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=GetTokenizer();
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return theTokenizer->GetTokenRecycler();
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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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nsITokenizer* nsExpatDTD::GetTokenizer(void) {
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if(!mTokenizer)
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mTokenizer=new nsExpatTokenizer();
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return mTokenizer;
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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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* 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* theToken=mTokenizer->PeekToken();
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if(theToken) {
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eHTMLTokenTypes theType=eHTMLTokenTypes(theToken->GetTokenType());
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if(eToken_attribute==theType){
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mTokenizer->PopToken(); //pop it for real...
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theNode.AddAttribute(theToken);
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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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/**
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* This method causes all tokens to be dispatched to the given tag handler.
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*
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* @update gess 3/25/98
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* @param aHandler -- object to receive subsequent tokens...
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* @return error code (usually 0)
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*/
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nsresult nsExpatDTD::CaptureTokenPump(nsITagHandler* aHandler) {
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nsresult result=NS_OK;
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return result;
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}
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/**
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* This method releases the token-pump capture obtained in CaptureTokenPump()
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*
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* @update gess 3/25/98
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* @param aHandler -- object that received tokens...
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* @return error code (usually 0)
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*/
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nsresult nsExpatDTD::ReleaseTokenPump(nsITagHandler* aHandler){
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nsresult result=NS_OK;
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return result;
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}
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