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nsParserNode.h
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nsParserNode.h
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/**
* MODULE NOTES:
* @update gess 4/1/98
*
* This class is defines the basic interface between the
* parser and the content sink. The parser will iterate
* over the collection of tokens that it sees from the
* tokenizer, coverting each related "group" into one of
* these. This object gets passed to the sink, and is
* then immediately reused.
*
* If you want to hang onto one of these, you should
* make your own copy.
*
*/
#ifndef NS_PARSERNODE__
#define NS_PARSERNODE__
#include "nsIParserNode.h"
#include "nsToken.h"
#include "nsString.h"
#include "nsParserCIID.h"
#include "nsDeque.h"
#include "nsDTDUtils.h"
class nsTokenAllocator;
class nsCParserNode : public nsIParserNode {
protected:
PRInt32 mRefCnt;
public:
void AddRef()
{
++mRefCnt;
}
void Release(nsFixedSizeAllocator& aPool)
{
if (--mRefCnt == 0)
Destroy(this, aPool);
}
#ifndef HEAP_ALLOCATED_NODES
protected:
/**
* Hide operator new; clients should use Create() instead.
*/
static void* operator new(size_t) CPP_THROW_NEW { return 0; }
/**
* Hide operator delete; clients should use Destroy() instead.
*/
static void operator delete(void*,size_t) {}
#endif
public:
static nsCParserNode* Create(CToken* aToken,
nsTokenAllocator* aTokenAllocator,
nsNodeAllocator* aNodeAllocator)
{
#ifdef HEAP_ALLOCATED_NODES
return new
#else
nsFixedSizeAllocator& pool = aNodeAllocator->GetArenaPool();
void* place = pool.Alloc(sizeof(nsCParserNode));
return ::new (place)
#endif
nsCParserNode(aToken, aTokenAllocator, aNodeAllocator);
}
static void Destroy(nsCParserNode* aNode, nsFixedSizeAllocator& aPool)
{
#ifdef HEAP_ALLOCATED_NODES
delete aNode;
#else
aNode->~nsCParserNode();
aPool.Free(aNode, sizeof(*aNode));
#endif
}
/**
* Default constructor
*/
nsCParserNode();
/**
* Constructor
* @update gess5/11/98
* @param aToken is the token this node "refers" to
*/
nsCParserNode(CToken* aToken,
nsTokenAllocator* aTokenAllocator,
nsNodeAllocator* aNodeAllocator=0);
/**
* Destructor
* @update gess5/11/98
*/
virtual ~nsCParserNode();
/**
* Init
* @update gess5/11/98
*/
virtual nsresult Init(CToken* aToken,
nsTokenAllocator* aTokenAllocator,
nsNodeAllocator* aNodeAllocator=0);
/**
* Retrieve the name of the node
* @update gess5/11/98
* @return string containing node name
*/
virtual const nsAString& GetTagName() const;
/**
* Retrieve the text from the given node
* @update gess5/11/98
* @return string containing node text
*/
virtual const nsAString& GetText() const;
/**
* Retrieve the type of the parser node.
* @update gess5/11/98
* @return node type.
*/
virtual PRInt32 GetNodeType() const;
/**
* Retrieve token type of parser node
* @update gess5/11/98
* @return token type
*/
virtual PRInt32 GetTokenType() const;
//***************************************
//methods for accessing key/value pairs
//***************************************
/**
* Retrieve the number of attributes in this node.
* @update gess5/11/98
* @return count of attributes (may be 0)
*/
virtual PRInt32 GetAttributeCount(PRBool askToken=PR_FALSE) const;
/**
* Retrieve the key (of key/value pair) at given index
* @update gess5/11/98
* @param anIndex is the index of the key you want
* @return string containing key.
*/
virtual const nsAString& GetKeyAt(PRUint32 anIndex) const;
/**
* Retrieve the value (of key/value pair) at given index
* @update gess5/11/98
* @param anIndex is the index of the value you want
* @return string containing value.
*/
virtual const nsAString& GetValueAt(PRUint32 anIndex) const;
/**
* NOTE: When the node is an entity, this will translate the entity
* to it's unicode value, and store it in aString.
* @update gess5/11/98
* @param aString will contain the resulting unicode string value
* @return int (unicode char or unicode index from table)
*/
virtual PRInt32 TranslateToUnicodeStr(nsString& aString) const;
/**
*
* @update gess5/11/98
* @param
* @return
*/
virtual void AddAttribute(CToken* aToken);
/**
* This getter retrieves the line number from the input source where
* the token occured. Lines are interpreted as occuring between \n characters.
* @update gess7/24/98
* @return int containing the line number the token was found on
*/
virtual PRInt32 GetSourceLineNumber(void) const;
/** This method pop the attribute token from the given index
* @update harishd 03/25/99
* @return token at anIndex
*/
virtual CToken* PopAttributeToken();
/** Retrieve a string containing the tag and its attributes in "source" form
* @update rickg 06June2000
* @return void
*/
virtual void GetSource(nsString& aString);
/**
* This pair of methods allows us to set a generic bit (for arbitrary use)
* on each node stored in the context.
* @update gess 11May2000
*/
virtual PRBool GetGenericState(void) const {return mGenericState;}
virtual void SetGenericState(PRBool aState) {mGenericState=aState;}
/** Release all the objects you're holding
* @update harishd 08/02/00
* @return void
*/
virtual nsresult ReleaseAll();
PRPackedBool mGenericState;
PRInt32 mUseCount;
CToken* mToken;
nsTokenAllocator* mTokenAllocator;
#ifdef HEAP_ALLOCATED_NODES
nsNodeAllocator* mNodeAllocator; // weak
#endif
};
class nsCParserStartNode : public nsCParserNode
{
public:
static nsCParserNode* Create(CToken* aToken,
nsTokenAllocator* aTokenAllocator,
nsNodeAllocator* aNodeAllocator)
{
#ifdef HEAP_ALLOCATED_NODES
return new
#else
nsFixedSizeAllocator& pool = aNodeAllocator->GetArenaPool();
void* place = pool.Alloc(sizeof(nsCParserStartNode));
return ::new (place)
#endif
nsCParserStartNode(aToken, aTokenAllocator, aNodeAllocator);
}
nsCParserStartNode()
: nsCParserNode(), mAttributes(0) { }
nsCParserStartNode(CToken* aToken,
nsTokenAllocator* aTokenAllocator,
nsNodeAllocator* aNodeAllocator = 0)
: nsCParserNode(aToken, aTokenAllocator, aNodeAllocator), mAttributes(0) { }
virtual ~nsCParserStartNode()
{
NS_ASSERTION(mTokenAllocator || mAttributes.GetSize() == 0,
"Error: no token allocator");
CToken* theAttrToken = 0;
while ((theAttrToken = NS_STATIC_CAST(CToken*, mAttributes.Pop()))) {
IF_FREE(theAttrToken, mTokenAllocator);
}
}
virtual nsresult Init(CToken* aToken,
nsTokenAllocator* aTokenAllocator,
nsNodeAllocator* aNodeAllocator = 0);
virtual void AddAttribute(CToken* aToken);
virtual PRInt32 GetAttributeCount(PRBool askToken = PR_FALSE) const;
virtual const nsAString& GetKeyAt(PRUint32 anIndex) const;
virtual const nsAString& GetValueAt(PRUint32 anIndex) const;
virtual CToken* PopAttributeToken();
virtual void GetSource(nsString& aString);
virtual nsresult ReleaseAll();
protected:
nsDeque mAttributes;
};
#endif