gecko-dev/htmlparser/public/nsIParserNode.h

181 lines
5.7 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 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 NPL, 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 NPL, 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_IPARSERNODE__
#define NS_IPARSERNODE__
#include "nsISupports.h"
#include "prtypes.h"
#include "nsString.h"
#include "nsDebug.h"
//#define HEAP_ALLOCATED_NODES
//#define DEBUG_TRACK_NODES
class nsIAtom;
class CToken;
// 6e59f160-2717-11d2-9246-00805f8a7ab6
#define NS_IPARSER_NODE_IID \
{0x6e59f160, 0x2717, 0x11d1, \
{0x92, 0x46, 0x00, 0x80, 0x5f, 0x8a, 0x7a, 0xb6}}
/**
* Parser nodes are the unit of exchange between the
* parser and the content sink. Nodes offer access to
* the current token, its attributes, and its skipped-
* content if applicable.
*
* @update gess 3/25/98
*/
class nsIParserNode { // XXX Should be nsAParserNode
public:
/**
* Retrieve the name of the node
* @update gess5/11/98
* @return string containing node name
*/
virtual const nsAString& GetTagName() const = 0; //to get name of tag
/**
* Retrieve the text from the given node
* @update gess5/11/98
* @return string containing node text
*/
virtual const nsAString& GetText() const = 0; //get plain text if available
/**
* Retrieve the type of the parser node.
* @update gess5/11/98
* @return node type.
*/
virtual PRInt32 GetNodeType() const =0;
/**
* Retrieve token type of parser node
* @update gess5/11/98
* @return token type
*/
virtual PRInt32 GetTokenType() const =0;
/**
* 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 =0;
/**
* 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 = 0;
/**
* 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 = 0;
/**
* 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 = 0;
virtual void AddAttribute(CToken* aToken)=0;
/**
* 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 =0;
/**
* 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 =0;
virtual void SetGenericState(PRBool aState) =0;
/** Retrieve a string containing the tag and its attributes in "source" form
* @update rickg 06June2000
* @return void
*/
virtual void GetSource(nsString& aString)=0;
/** Release all the objects you're holding
* @update harishd 08/02/00
* @return void
*/
virtual nsresult ReleaseAll()=0;
};
#endif