315 lines
8.1 KiB
C++
315 lines
8.1 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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#include "nsParserNode.h"
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#include "string.h"
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#include "nsHTMLTokens.h"
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#include "nshtmlpars.h"
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#include "nsITokenizer.h"
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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static NS_DEFINE_IID(kClassIID, NS_PARSER_NODE_IID);
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static NS_DEFINE_IID(kIParserNodeIID, NS_IPARSER_NODE_IID);
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nsAutoString& GetEmptyString() {
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static nsAutoString theEmptyString("");
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return theEmptyString;
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}
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/**
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* Default constructor
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*
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* @update gess 3/25/98
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* @param aToken -- token to init internal token
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* @return
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*/
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nsCParserNode::nsCParserNode(CToken* aToken,PRInt32 aLineNumber,nsITokenRecycler* aRecycler):
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nsIParserNode(), mSkippedContent("") {
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NS_INIT_REFCNT();
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static int theNodeCount=0;
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theNodeCount++;
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mAttributes=0;
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mLineNumber=aLineNumber;
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mToken=aToken;
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mRecycler=aRecycler;
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}
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static void RecycleTokens(nsITokenRecycler* aRecycler,nsDeque& aDeque) {
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CToken* theToken=0;
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if(aRecycler) {
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while((theToken=(CToken*)aDeque.Pop())){
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aRecycler->RecycleToken(theToken);
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}
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}
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}
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/**
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* default destructor
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* NOTE: We intentionally DONT recycle mToken here.
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* It may get cached for use elsewhere
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* @update gess 3/25/98
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* @param
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* @return
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*/
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nsCParserNode::~nsCParserNode() {
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if(mRecycler && mAttributes) {
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RecycleTokens(mRecycler,*mAttributes);
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delete mAttributes;
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}
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}
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NS_IMPL_ADDREF(nsCParserNode)
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NS_IMPL_RELEASE(nsCParserNode)
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/**
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* Init
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*
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* @update gess 3/25/98
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* @param
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* @return
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*/
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nsresult nsCParserNode::Init(CToken* aToken,PRInt32 aLineNumber,nsITokenRecycler* aRecycler) {
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mLineNumber=aLineNumber;
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mRecycler=aRecycler;
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if(mAttributes && (mAttributes->GetSize()))
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RecycleTokens(mRecycler,*mAttributes);
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mToken=aToken;
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return NS_OK;
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}
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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 3/25/98
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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 nsCParserNode::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 = (nsIParserNode*)(this);
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}
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else if(aIID.Equals(kIParserNodeIID)) { //do IParser base class...
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*aInstancePtr = (nsIParserNode*)(this);
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}
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else if(aIID.Equals(kClassIID)) { //do this class...
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*aInstancePtr = (nsCParserNode*)(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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* Causes the given attribute to be added to internal
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* mAttributes list, and mAttributeCount to be incremented.
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*
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* @update gess 3/25/98
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* @param aToken -- token to be added to attr list
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* @return
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*/
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void nsCParserNode::AddAttribute(CToken* aToken) {
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NS_PRECONDITION(0!=aToken, "Error: Token shouldn't be null!");
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if(!mAttributes)
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mAttributes=new nsDeque(0);
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if(mAttributes) {
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mAttributes->Push(aToken);
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}
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}
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/**
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* Gets the name of this node. Currently unused.
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*
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* @update gess 3/25/98
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* @param
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* @return string ref containing node name
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*/
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const nsString& nsCParserNode::GetName() const {
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return GetEmptyString();
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// return mName;
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}
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/**
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* Get text value of this node, which translates into
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* getting the text value of the underlying token
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*
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* @update gess 3/25/98
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* @param
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* @return string ref of text from internal token
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*/
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const nsString& nsCParserNode::GetText() const {
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return mToken->GetStringValueXXX();
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}
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/**
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* Get text value of this node, which translates into
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* getting the text value of the underlying token
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*
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* @update gess 3/25/98
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* @param
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* @return string ref of text from internal token
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*/
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const nsString& nsCParserNode::GetSkippedContent() const {
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return mSkippedContent;
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}
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/**
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* Get text value of this node, which translates into
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* getting the text value of the underlying token
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*
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* @update gess 3/25/98
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* @param
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* @return string ref of text from internal token
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*/
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void nsCParserNode::SetSkippedContent(nsString& aString) {
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mSkippedContent=aString;
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}
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/**
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* Get node type, meaning, get the tag type of the
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* underlying token
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*
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* @update gess 3/25/98
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* @param
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* @return int value that represents tag type
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*/
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PRInt32 nsCParserNode::GetNodeType(void) const{
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return mToken->GetTypeID();
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}
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/**
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* Gets the token type, which corresponds to a value from
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* eHTMLTokens_xxx.
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*
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* @update gess 3/25/98
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* @param
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* @return
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*/
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PRInt32 nsCParserNode::GetTokenType(void) const{
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return mToken->GetTokenType();
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}
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/**
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* Retrieve the number of attributes on this node
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*
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* @update gess 3/25/98
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* @param
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* @return int -- representing attribute count
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*/
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PRInt32 nsCParserNode::GetAttributeCount(PRBool askToken) const{
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PRInt32 result=0;
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if(PR_FALSE==askToken) {
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if(mAttributes)
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result=mAttributes->GetSize();
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}
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else result=mToken->GetAttributeCount();
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return result;
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}
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/**
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* Retrieve the string rep of the attribute key at the
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* given index.
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*
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* @update gess 3/25/98
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* @param anIndex-- offset of attribute to retrieve
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* @return string rep of given attribute text key
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*/
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const nsString& nsCParserNode::GetKeyAt(PRUint32 anIndex) const {
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PRInt32 theCount = (mAttributes) ? mAttributes->GetSize() : 0;
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if((PRInt32)anIndex<theCount) {
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CAttributeToken* tkn=(CAttributeToken*)mAttributes->ObjectAt(anIndex);
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return tkn->GetKey();
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}
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return GetEmptyString();
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}
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/**
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* Retrieve the string rep of the attribute at given offset
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*
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* @update gess 3/25/98
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* @param anIndex-- offset of attribute to retrieve
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* @return string rep of given attribute text value
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*/
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const nsString& nsCParserNode::GetValueAt(PRUint32 anIndex) const {
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PRInt32 theCount = (mAttributes) ? mAttributes->GetSize() : 0;
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NS_PRECONDITION(PRInt32(anIndex)<theCount, "Bad attr index");
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if(PRInt32(anIndex)<theCount) {
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CAttributeToken* tkn=(CAttributeToken*)mAttributes->ObjectAt(anIndex);
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return tkn->GetStringValueXXX();
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}
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return GetEmptyString();
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}
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PRInt32 nsCParserNode::TranslateToUnicodeStr(nsString& aString) const
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{
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if (eToken_entity == mToken->GetTokenType()) {
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return ((CEntityToken*)mToken)->TranslateToUnicodeStr(aString);
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}
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return -1;
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}
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/**
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* This getter retrieves the line number from the input source where
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* the token occured. Lines are interpreted as occuring between \n characters.
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* @update gess7/24/98
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* @return int containing the line number the token was found on
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*/
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PRInt32 nsCParserNode::GetSourceLineNumber(void) const {
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return mLineNumber;
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}
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/**
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* This method pop the attribute token
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* @update harishd 03/25/99
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* @return token at anIndex
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*/
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CToken* nsCParserNode::PopAttributeToken() {
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CToken* result=0;
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if(mAttributes) {
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result =(CToken*)mAttributes->Pop();
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}
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return result;
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}
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