/** Interface for NSXMLParser for GNUStep
   Copyright (C) 2004 Free Software Foundation, Inc.

   Written by:  Richard Frith-Macdonald <rfm@gnu.org>
   Date: May 2004
   
   This file is part of the GNUstep Base Library.
   
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02111 USA.

   AutogsdocSource: NSXMLParser.m
   */ 

#ifndef __NSXMLParser_h_GNUSTEP_BASE_INCLUDE
#define __NSXMLParser_h_GNUSTEP_BASE_INCLUDE
#import	<GNUstepBase/GSVersionMacros.h>

#if OS_API_VERSION(100300, GS_API_LATEST)

#import	<Foundation/NSObject.h>

#if	defined(__cplusplus)
extern "C" {
#endif

@class NSData, NSDictionary, NSError, NSString, NSURL;

/**
 * Domain for errors
 */
GS_EXPORT NSString* const NSXMLParserErrorDomain;

/**
 * This class is a PRE-ALPHA implementation.  You should be prepared to
 * track down and fix bugs and preferably contribute fixes back.<br />
 * If you don't want to do that, use the [GSXMLParser] class instead ...
 * This NSXMLParser class is implemented as a wrapper round some of the
 * functionality of the more powerful GSXML APIs, and is intended as a
 * MacOSX compatibility feature.
 * <p>
 *   This class implements an event driven parser handling the parsing
 *   process by sending messages to a delegate when certain parts of the
 *   XML document being parsed are encountered.
 * </p>
 * <p>
 *   To use the class, you create and initialise an instance with a particular
 *   XML document, set the delegate of the instance, and send a -parse message
 *   to it.  The delegate must then make use of the information it receives
 *   in the messages it gets from the parser.
 * </p>
 * <p>
 *   The [NSObject(NSXMLParserDelegateEventAdditions)] informal protocol
 *   documents the methods which the delegate object may implement in order
 *   to handle the parsing process.
 * </p>
 */
@interface NSXMLParser : NSObject
{
#if	GS_EXPOSE(NSXMLParser)
@public
  void		*_parser;	// GSXMLParser
  void		*_handler;	// SAXHandler
#endif
#if     GS_NONFRAGILE
#else
  /* Pointer to private additional data used to avoid breaking ABI
   * when we don't have the non-fragile ABI available.
   * Use this mechanism rather than changing the instance variable
   * layout (see Source/GSInternal.h for details).
   */
  @private id _internal GS_UNUSED_IVAR;
#endif
}

/**
 * Terminates the current parse operation and sends an error to the
 * delegate of the parser.
 */
- (void) abortParsing;

/**
 * Returns the delegate previously set using -setDelegate: or nil if
 * no delegate is set.
 */
- (id) delegate;

/**
 * Convenience method fetching data from anURL.<br />
 */
- (id) initWithContentsOfURL: (NSURL*)anURL;

/** <init />
 * Initialises the parser with the specified xml data.
 */
- (id) initWithData: (NSData*)data;

/**
 * Parses the supplied data and returns YES on success, NO otherwise.
 */
- (BOOL) parse;

/**
 * Returns the last error produced by parsing (if any).
 */
- (NSError*) parserError;

/**
 * Sets the parser delegate (which is not retained).
 */
- (void) setDelegate: (id)delegate;

/**
 * Set flag to determine whether the namespaceURI and the qualified name
 * of an element is provided in the
 * [NSObject(NSXMLParserDelegateEventAdditions)-parser:didStartElement:namespaceURI:qualifiedName:attributes:]
 * and [NSObject(NSXMLParserDelegateEventAdditions)-parser:didEndElement:namespaceURI:qualifiedName:] methods.
 */
- (void) setShouldProcessNamespaces: (BOOL)aFlag;

/**
 * Sets a flag to specify whether the parser should call the
 * [NSObject(NSXMLParserDelegateEventAdditions)-parser:didStartMappingPrefix:toURI:] and
 * [NSObject(NSXMLParserDelegateEventAdditions)-parser:didEndMappingPrefix:] delegate methods.
 */
- (void) setShouldReportNamespacePrefixes: (BOOL)aFlag;

/**
 * Sets flag to determine if declarations of external entities are
 * reported using
 * [NSObject(NSXMLParserDelegateEventAdditions)-parser:foundExternalEntityDeclarationWithName:publicID:systemID:]
 */
- (void) setShouldResolveExternalEntities: (BOOL)aFlag;

/**
 * Returns the value set by -setShouldProcessNamespaces:
 */
- (BOOL) shouldProcessNamespaces;

/**
 * Returns the value set by -setShouldReportNamespacePrefixes:
 */
- (BOOL) shouldReportNamespacePrefixes;

/**
 * Returns the value set by -setShouldResolveExternalEntities:
 */
- (BOOL) shouldResolveExternalEntities;

@end

@interface NSXMLParser (NSXMLParserLocatorAdditions)
/**
 * Returns the current column number of the document being parsed.
 */
- (NSInteger) columnNumber;

/**
 * Returns the current line number of the document being parsed.
 */
- (NSInteger) lineNumber;

/**
 * Returns the public identifier of the external entity in the
 * document being parsed.
 */
- (NSString*) publicID;

/**
 * Returns the system identifier of the external entity in the
 * document being parsed.
 */
- (NSString*) systemID;
@end

/**
 * Methods implemented by a delegate in order to make use of the parser.<br />
 * This is an informal protocol.
 */
@interface NSObject (NSXMLParserDelegateEventAdditions)

/** <override-dummy />
 */
- (NSData*) parser: (NSXMLParser*)aParser
  resolveExternalEntityName: (NSString*)aName
  systemID: (NSString*)aSystemID;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  didEndElement: (NSString*)anElementName
  namespaceURI: (NSString*)aNamespaceURI
  qualifiedName: (NSString*)aQualifierName;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  didEndMappingPrefix: (NSString*)aPrefix;

/** <override-dummy />
 * Called when the start of an element is encountered in the document,
 * this provides the name of the element, a dictionary containing the
 * attributes (if any) and (where namespaces are used) the namespace
 * information for the element.
 */
- (void) parser: (NSXMLParser*)aParser
  didStartElement: (NSString*)anElementName
  namespaceURI: (NSString*)aNamespaceURI
  qualifiedName: (NSString*)aQualifierName
  attributes: (NSDictionary*)anAttributeDict;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  didStartMappingPrefix: (NSString*)aPrefix
  toURI: (NSString*)aNamespaceURI;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundAttributeDeclarationWithName: (NSString*)anAttributeName
  forElement: (NSString*)anElementName
  type: (NSString*)aType
  defaultValue: (NSString*)aDefaultValue;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundCDATA: (NSData*)aBlock;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundCharacters: (NSString*)aString;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundComment: (NSString*)aComment;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundElementDeclarationWithName: (NSString*)anElementName
  model: (NSString*)aModel;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundExternalEntityDeclarationWithName: (NSString*)aName
  publicID: (NSString*)aPublicID
  systemID: (NSString*)aSystemID;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundIgnorableWhitespace: (NSString*)aWhitespaceString;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundInternalEntityDeclarationWithName: (NSString*)aName
  value: (NSString*)aValue;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundNotationDeclarationWithName: (NSString*)aName
  publicID: (NSString*)aPublicID
  systemID: (NSString*)aSystemID;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundProcessingInstructionWithTarget: (NSString*)aTarget
  data: (NSString*)aData;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  foundUnparsedEntityDeclarationWithName: (NSString*)aName
  publicID: (NSString*)aPublicID
  systemID: (NSString*)aSystemID
  notationName: (NSString*)aNotationName;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  parseErrorOccurred: (NSError*)anError;

/** <override-dummy />
 */
- (void) parser: (NSXMLParser*)aParser
  validationErrorOccurred: (NSError*)anError;

/** <override-dummy />
 * Called when parsing ends.
 */
- (void) parserDidEndDocument: (NSXMLParser*)aParser;

/** <override-dummy />
 * Called when parsing begins.
 */
- (void) parserDidStartDocument: (NSXMLParser*)aParser;
@end

/*
 * Provide the same error codes as MacOS-X, even if we don't use them all.
 */
enum {
  NSXMLParserInternalError = 1,
  NSXMLParserOutOfMemoryError = 2,
  NSXMLParserDocumentStartError = 3,
  NSXMLParserEmptyDocumentError = 4,
  NSXMLParserPrematureDocumentEndError = 5,
  NSXMLParserInvalidHexCharacterRefError = 6,
  NSXMLParserInvalidDecimalCharacterRefError = 7,
  NSXMLParserInvalidCharacterRefError = 8,
  NSXMLParserInvalidCharacterError = 9,
  NSXMLParserCharacterRefAtEOFError = 10,
  NSXMLParserCharacterRefInPrologError = 11,
  NSXMLParserCharacterRefInEpilogError = 12,
  NSXMLParserCharacterRefInDTDError = 13,
  NSXMLParserEntityRefAtEOFError = 14,
  NSXMLParserEntityRefInPrologError = 15,
  NSXMLParserEntityRefInEpilogError = 16,
  NSXMLParserEntityRefInDTDError = 17,
  NSXMLParserParsedEntityRefAtEOFError = 18,
  NSXMLParserParsedEntityRefInPrologError = 19,
  NSXMLParserParsedEntityRefInEpilogError = 20,
  NSXMLParserParsedEntityRefInInternalSubsetError = 21,
  NSXMLParserEntityReferenceWithoutNameError = 22,
  NSXMLParserEntityReferenceMissingSemiError = 23,
  NSXMLParserParsedEntityRefNoNameError = 24,
  NSXMLParserParsedEntityRefMissingSemiError = 25,
  NSXMLParserUndeclaredEntityError = 26,
  NSXMLParserUnparsedEntityError = 28,
  NSXMLParserEntityIsExternalError = 29,
  NSXMLParserEntityIsParameterError = 30,
  NSXMLParserUnknownEncodingError = 31,
  NSXMLParserEncodingNotSupportedError = 32,
  NSXMLParserStringNotStartedError = 33,
  NSXMLParserStringNotClosedError = 34,
  NSXMLParserNamespaceDeclarationError = 35,
  NSXMLParserEntityNotStartedError = 36,
  NSXMLParserEntityNotFinishedError = 37,
  NSXMLParserLessThanSymbolInAttributeError = 38,
  NSXMLParserAttributeNotStartedError = 39,
  NSXMLParserAttributeNotFinishedError = 40,
  NSXMLParserAttributeHasNoValueError = 41,
  NSXMLParserAttributeRedefinedError = 42,
  NSXMLParserLiteralNotStartedError = 43,
  NSXMLParserLiteralNotFinishedError = 44,
  NSXMLParserCommentNotFinishedError = 45,
  NSXMLParserProcessingInstructionNotStartedError = 46,
  NSXMLParserProcessingInstructionNotFinishedError = 47,
  NSXMLParserNotationNotStartedError = 48,
  NSXMLParserNotationNotFinishedError = 49,
  NSXMLParserAttributeListNotStartedError = 50,
  NSXMLParserAttributeListNotFinishedError = 51,
  NSXMLParserMixedContentDeclNotStartedError = 52,
  NSXMLParserMixedContentDeclNotFinishedError = 53,
  NSXMLParserElementContentDeclNotStartedError = 54,
  NSXMLParserElementContentDeclNotFinishedError = 55,
  NSXMLParserXMLDeclNotStartedError = 56,
  NSXMLParserXMLDeclNotFinishedError = 57,
  NSXMLParserConditionalSectionNotStartedError = 58,
  NSXMLParserConditionalSectionNotFinishedError = 59,
  NSXMLParserExternalSubsetNotFinishedError = 60,
  NSXMLParserDOCTYPEDeclNotFinishedError = 61,
  NSXMLParserMisplacedCDATAEndStringError = 62,
  NSXMLParserCDATANotFinishedError = 63,
  NSXMLParserMisplacedXMLDeclarationError = 64,
  NSXMLParserSpaceRequiredError = 65,
  NSXMLParserSeparatorRequiredError = 66,
  NSXMLParserNMTOKENRequiredError = 67,
  NSXMLParserNAMERequiredError = 68,
  NSXMLParserPCDATARequiredError = 69,
  NSXMLParserURIRequiredError = 70,
  NSXMLParserPublicIdentifierRequiredError = 71,
  NSXMLParserLTRequiredError = 72,
  NSXMLParserGTRequiredError = 73,
  NSXMLParserLTSlashRequiredError = 74,
  NSXMLParserEqualExpectedError = 75,
  NSXMLParserTagNameMismatchError = 76,
  NSXMLParserUnfinishedTagError = 77,
  NSXMLParserStandaloneValueError = 78,
  NSXMLParserInvalidEncodingNameError = 79,
  NSXMLParserCommentContainsDoubleHyphenError = 80,
  NSXMLParserInvalidEncodingError = 81,
  NSXMLParserExternalStandaloneEntityError = 82,
  NSXMLParserInvalidConditionalSectionError = 83,
  NSXMLParserEntityValueRequiredError = 84,
  NSXMLParserNotWellBalancedError = 85,
  NSXMLParserExtraContentError = 86,
  NSXMLParserInvalidCharacterInEntityError = 87,
  NSXMLParserParsedEntityRefInInternalError = 88,
  NSXMLParserEntityRefLoopError = 89,
  NSXMLParserEntityBoundaryError = 90,
  NSXMLParserInvalidURIError = 91,
  NSXMLParserURIFragmentError = 92,
  NSXMLParserNoDTDError = 94,
  NSXMLParserDelegateAbortedParseError = 512
};
typedef NSUInteger NSXMLParserError;

#if	defined(__cplusplus)
}
#endif

#endif
#endif	/* __NSXMLParser_h_GNUSTEP_BASE_INCLUDE */

