/*
* Copyright (c) 2008, 2009, 2010, 2011
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "OFObject.h"
#import "OFString.h"
#import "OFXMLAttribute.h"
@class OFXMLParser;
@class OFArray;
@class OFMutableArray;
@class OFStream;
#if defined(OF_HAVE_PROPERTIES) && defined(OF_HAVE_BLOCKS)
typedef void (^of_xml_parser_processing_instructions_block_t)(
OFXMLParser *parser, OFString *pi);
typedef void (^of_xml_parser_element_start_block_t)(OFXMLParser *parser,
OFString *name, OFString *prefix, OFString *ns, OFArray *attrs);
typedef void (^of_xml_parser_element_end_block_t)(OFXMLParser *parser,
OFString *name, OFString *prefix, OFString *ns);
typedef void (^of_xml_parser_string_block_t)(OFXMLParser *parser,
OFString *string);
typedef OFString* (^of_xml_parser_unknown_entity_block_t)(OFXMLParser *parser,
OFString *entity);
#endif
/**
* \brief A protocol that needs to be implemented by delegates for OFXMLParser.
*/
@protocol OFXMLParserDelegate
/**
* This callback is called when the XML parser found processing instructions.
*
* \param parser The parser which found processing instructions
* \param pi The processing instructions
*/
- (void)parser: (OFXMLParser*)parser
foundProcessingInstructions: (OFString*)pi;
/**
* This callback is called when the XML parser found the start of a new tag.
*
* \param parser The parser which found a new tag
* \param name The name of the tag which just started
* \param prefix The prefix of the tag which just started or nil
* \param ns The namespace of the tag which just started or nil
* \param attrs The attributes included in the tag which just started or nil
*/
- (void)parser: (OFXMLParser*)parser
didStartElement: (OFString*)name
withPrefix: (OFString*)prefix
namespace: (OFString*)ns
attributes: (OFArray*)attrs;
/**
* This callback is called when the XML parser found the end of a tag.
*
* \param parser The parser which found the end of a tag
* \param name The name of the tag which just ended
* \param prefix The prefix of the tag which just ended or nil
* \param ns The namespace of the tag which just ended or nil
*/
- (void)parser: (OFXMLParser*)parser
didEndElement: (OFString*)name
withPrefix: (OFString*)prefix
namespace: (OFString*)ns;
/**
* This callback is called when the XML parser found characters.
*
* In case there are comments or CDATA, it is possible that this callback is
* called multiple times in a row.
*
* \param parser The parser which found a string
* \param string The string the XML parser found
*/
- (void)parser: (OFXMLParser*)parser
foundCharacters: (OFString*)string;
/**
* This callback is called when the XML parser found CDATA.
*
* \param parser The parser which found a string
* \param cdata The CDATA the XML parser found
*/
- (void)parser: (OFXMLParser*)parser
foundCDATA: (OFString*)cdata;
/**
* This callback is called when the XML parser found a comment.
*
* \param parser The parser which found a comment
* \param comment The comment the XML parser found
*/
- (void)parser: (OFXMLParser*)parser
foundComment: (OFString*)comment;
/**
* This callback is called when the XML parser found an entity it doesn't know.
* The callback is supposed to return a substitution for the entity or nil if
* it is not known to the callback as well, in which case an exception will be
* risen.
*
* \param parser The parser which found an unknown entity
* \param entity The name of the entity the XML parser didn't know
* \return A substitution for the entity or nil
*/
- (OFString*)parser: (OFXMLParser*)parser
foundUnknownEntityNamed: (OFString*)entity;
@end
/**
* \brief An event-based XML parser.
*
* OFXMLParser is an event-based XML parser which calls the delegate's callbacks
* as soon asit finds something, thus suitable for streams as well.
*/
@interface OFXMLParser: OFObject <OFStringXMLUnescapingDelegate>
{
id <OFXMLParserDelegate> delegate;
enum {
OF_XMLPARSER_OUTSIDE_TAG,
OF_XMLPARSER_TAG_OPENED,
OF_XMLPARSER_IN_PROCESSING_INSTRUCTIONS,
OF_XMLPARSER_IN_TAG_NAME,
OF_XMLPARSER_IN_CLOSE_TAG_NAME,
OF_XMLPARSER_IN_TAG,
OF_XMLPARSER_IN_ATTR_NAME,
OF_XMLPARSER_EXPECT_DELIM,
OF_XMLPARSER_IN_ATTR_VALUE,
OF_XMLPARSER_EXPECT_CLOSE,
OF_XMLPARSER_EXPECT_SPACE_OR_CLOSE,
OF_XMLPARSER_IN_EXCLAMATIONMARK,
OF_XMLPARSER_IN_CDATA_OPENING,
OF_XMLPARSER_IN_CDATA_1,
OF_XMLPARSER_IN_CDATA_2,
OF_XMLPARSER_IN_COMMENT_OPENING,
OF_XMLPARSER_IN_COMMENT_1,
OF_XMLPARSER_IN_COMMENT_2,
OF_XMLPARSER_IN_DOCTYPE,
OF_XMLPARSER_NUM_STATES
} state;
OFMutableString *cache;
OFString *name;
OFString *prefix;
OFMutableArray *namespaces;
OFMutableArray *attrs;
OFString *attrName;
OFString *attrPrefix;
char delim;
OFMutableArray *previous;
#if defined(OF_HAVE_PROPERTIES) && defined(OF_HAVE_BLOCKS)
of_xml_parser_processing_instructions_block_t
processingInstructionsHandler;
of_xml_parser_element_start_block_t elementStartHandler;
of_xml_parser_element_end_block_t elementEndHandler;
of_xml_parser_string_block_t charactersHandler;
of_xml_parser_string_block_t CDATAHandler;
of_xml_parser_string_block_t commentHandler;
of_xml_parser_unknown_entity_block_t unknownEntityHandler;
#endif
size_t level;
size_t lineNumber;
BOOL lastCarriageReturn;
BOOL finishedParsing;
}
#ifdef OF_HAVE_PROPERTIES
@property (retain) id <OFXMLParserDelegate> delegate;
# ifdef OF_HAVE_BLOCKS
@property (copy) of_xml_parser_processing_instructions_block_t
processingInstructionsHandler;
@property (copy) of_xml_parser_element_start_block_t elementStartHandler;
@property (copy) of_xml_parser_element_end_block_t elementEndHandler;
@property (copy) of_xml_parser_string_block_t charactersHandler;
@property (copy) of_xml_parser_string_block_t CDATAHandler;
@property (copy) of_xml_parser_string_block_t commentHandler;
@property (copy) of_xml_parser_unknown_entity_block_t unknownEntityHandler;
# endif
#endif
/**
* \return A new, autoreleased OFXMLParser
*/
+ parser;
/**
* \return The delegate that is used by the XML parser
*/
- (id <OFXMLParserDelegate>)delegate;
/**
* Sets the delegate the OFXMLParser should use.
*
* \param delegate The delegate to use
*/
- (void)setDelegate: (id <OFXMLParserDelegate>)delegate;
#if defined(OF_HAVE_PROPERTIES) && defined(OF_HAVE_BLOCKS)
/**
* \return The processing instructions handler
*/
- (of_xml_parser_processing_instructions_block_t)processingInstructionsHandler;
/**
* Sets the processing instructions handler.
*
* \param block A processing instructions handler
*/
- (void)setProcessingInstructionsHandler:
(of_xml_parser_processing_instructions_block_t)block;
/**
* \return The element start handler
*/
- (of_xml_parser_element_start_block_t)elementStartHandler;
/**
* Sets the element start handler.
*
* \param block An element start handler
*/
- (void)setElementStartHandler: (of_xml_parser_element_start_block_t)block;
/**
* \return The element end handler
*/
- (of_xml_parser_element_end_block_t)elementEndHandler;
/**
* Sets the element end handler.
*
* \param block An element end handler
*/
- (void)setElementEndHandler: (of_xml_parser_element_end_block_t)block;
/**
* \return The characters handler
*/
- (of_xml_parser_string_block_t)charactersHandler;
/**
* Sets the characters handler.
*
* \param block A characters handler
*/
- (void)setCharactersHandler: (of_xml_parser_string_block_t)block;
/**
* \return The CDATA handler
*/
- (of_xml_parser_string_block_t)CDATAHandler;
/**
* Sets the CDATA handler.
*
* \param block A CDATA handler
*/
- (void)setCDATAHandler: (of_xml_parser_string_block_t)block;
/**
* \return The comment handler
*/
- (of_xml_parser_string_block_t)commentHandler;
/**
* Sets the comment handler.
*
* \param block A comment handler
*/
- (void)setCommentHandler: (of_xml_parser_string_block_t)block;
/**
* \return The unknown entity handler
*/
- (of_xml_parser_unknown_entity_block_t)unknownEntityHandler;
/**
* Sets the unknown entity handler.
*
* \param block An unknown entity handler
*/
- (void)setUnknownEntityHandler: (of_xml_parser_unknown_entity_block_t)block;
#endif
/**
* Parses a buffer with the specified size.
*
* \param buf The buffer to parse
* \param size The size of the buffer
*/
- (void)parseBuffer: (const char*)buf
withSize: (size_t)size;
/**
* Parses the specified string.
*
* \param str The string to parse
*/
- (void)parseString: (OFString*)str;
/**
* Parses the specified stream.
*
* \param stream The stream to parse
*/
- (void)parseStream: (OFStream*)stream;
/**
* Parses the specified file.
*
* \param path The path to the file to parse
*/
- (void)parseFile: (OFString*)path;
/**
* \return The current line number
*/
- (size_t)lineNumber;
/**
* \return Whether the XML parser has finished parsing
*/
- (BOOL)finishedParsing;
@end
@interface OFObject (OFXMLParserDelegate) <OFXMLParserDelegate>
@end