/*
* Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
*
* 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 "OFString.h"
OF_ASSUME_NONNULL_BEGIN
/** @file */
#ifdef __cplusplus
extern "C" {
#endif
extern int _OFString_XMLUnescaping_reference;
#ifdef __cplusplus
}
#endif
#ifdef OF_HAVE_BLOCKS
/**
* @brief A block which is called to replace unknown XML entities in an XML
* string.
*
* @param string The XML string which contains an unknown entity
* @param entity The XML entity which is unknown
* @return A replacement string for the unknown entity
*/
typedef OFString *_Nullable (^OFStringXMLUnescapingBlock)(OFString *string,
OFString *entity);
#endif
/**
* @protocol OFStringXMLUnescapingDelegate OFString.h ObjFW/OFString.h
*
* @brief A protocol that needs to be implemented by delegates for
* stringByXMLUnescapingWithHandler:.
*/
@protocol OFStringXMLUnescapingDelegate <OFObject>
/**
* @brief This callback is called when an unknown entity was found while trying
* to unescape XML.
*
* The callback is supposed to return a substitution for the entity or `nil` if
* it is unknown to the callback as well, in which case an exception will be
* thrown.
*
* @param string The string which contains the unknown entity
* @param entity The name of the entity that is unknown
* @return A substitution for the entity or `nil`
*/
- (nullable OFString *)string: (OFString *)string
containsUnknownEntityNamed: (OFString *)entity;
@end
@interface OFString (XMLUnescaping)
/**
* @brief The string with XML entities unescapted.
*/
@property (readonly, nonatomic) OFString *stringByXMLUnescaping;
/**
* @brief Unescapes XML in the string and uses the specified delegate for
* unknown entities.
*
* @param delegate An OFXMLUnescapingDelegate as a handler for unknown entities
* @throw OFInvalidFormatException The string is not a valid XML string
* @throw OFUnknownXMLEntityException The string contains unknown XML entities
*/
- (OFString *)stringByXMLUnescapingWithDelegate:
(nullable id <OFStringXMLUnescapingDelegate>)delegate;
#ifdef OF_HAVE_BLOCKS
/**
* @brief Unescapes XML in the string and uses the specified block for unknown
* entities.
*
* @param block A block which handles unknown entities
* @throw OFInvalidFormatException The string is not a valid XML string
* @throw OFUnknownXMLEntityException The string contains unknown XML entities
*/
- (OFString *)stringByXMLUnescapingWithBlock: (OFStringXMLUnescapingBlock)block;
#endif
@end
OF_ASSUME_NONNULL_END