ObjFW  Artifact [697471ead5]

Artifact 697471ead55d772b56ed9d11e02a23689fdbb55aa6faf9ec527d773bd83cb740:

• File src/OFXMLElementBuilder.h — part of check-in [48980f2297] at 2015-11-29 11:43:05 on branch trunk — Make properties a requirement and clean up code

  This increases the required GCC version from 4.0 to 4.6 (exception:
  Apple GCC, which already supports this with >= 4.0 starting with OS X
  10.5). Since even GCC 4.6 is really old by now, there is no point in
  still supporting something even older and making the code ugly because
  of that. While some hardware and OS support was dropped from GCC 4.6
  compared to GCC 4.0, there is nothing in there that would be an
  interesting target with the exception of BeOS maybe - but a port to BeOS
  can also be achieved using the Haiku support. The other dropped OSes are
  mostly old versions of OSes while newer ones are still being supported
  (and those newer versions of those OSes still support the same
  hardware). (user: js, size: 4331) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
 *   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 "OFXMLParser.h"

OF_ASSUME_NONNULL_BEGIN

@class OFMutableArray OF_GENERIC(ObjectType);
@class OFXMLElement;
@class OFXMLElementBuilder;

/*!
 * @protocol OFXMLElementBuilderDelegate
 *	     OFXMLElementBuilder.h ObjFW/OFXMLElementBuilder.h
 *
 * @brief A protocol that needs to be implemented by delegates for
 * OFXMLElementBuilder.
 */
@protocol OFXMLElementBuilderDelegate <OFObject>
/*!
 * @brief This callback is called when the OFXMLElementBuilder built an element.
 *
 * If the OFXMLElementBuilder was used as a delegate for the OFXMLParser since
 * parsing started, this will return the complete document as an OFXMLElement
 * with all children.
 *
 * @param builder The builder which built an OFXMLElement
 * @param element The OFXMLElement the OFXMLElementBuilder built
 */
- (void)elementBuilder: (OFXMLElementBuilder*)builder
       didBuildElement: (OFXMLElement*)element;

#ifdef OF_HAVE_OPTIONAL_PROTOCOLS
@optional
#endif

/*!
 * @brief This callback is called when the OFXMLElementBuilder built an
 *	  OFXMLNode which is not inside an element.
 *
 * This is usually called for comments or whitespace character data before the
 * root element.
 *
 * @param builder The builder which built the OFXMLNode without parent
 * @param node The OFXMLNode the OFXMLElementBuilder built
 */
-   (void)elementBuilder: (OFXMLElementBuilder*)builder
  didBuildParentlessNode: (OFXMLNode*)node;

/*!
 * @brief This callback is called when the OFXMLElementBuilder gets a close tag
 *	  which does not belong there.
 *
 * Most likely, the OFXMLElementBuilder was used to build XML only of a child
 * of the root element and the root element was closed. Often the delegate is
 * set to the OFXMLElementBuilder when a certain element is found, this can be
 * used then to set the delegate back after that certain element has been
 * closed.
 *
 * If this method is not implemented in the delegate, the default is to throw
 * an OFMalformedXMLException.
 *
 * @param builder The builder which did not expect the close tag
 * @param name The name of the close tag
 * @param prefix The prefix of the close tag
 * @param namespace_ The namespace of the close tag
 */
- (void)elementBuilder: (OFXMLElementBuilder*)builder
  didNotExpectCloseTag: (OFString*)name
		prefix: (nullable OFString*)prefix
	     namespace: (nullable OFString*)namespace_;

/*!
 * @brief This callback is called when the XML parser for the element builder
 *	  found an unknown entity.
 *
 * @param builder The element builder which found an unknown entity
 * @param entity The name of the entity
 * @return The substitution for the entity
 */
- (OFString*)elementBuilder: (OFXMLElementBuilder*)builder
    foundUnknownEntityNamed: (OFString*)entity;
@end

/*!
 * @class OFXMLElementBuilder OFXMLElementBuilder.h ObjFW/OFXMLElementBuilder.h
 *
 * @brief A class implementing the OFXMLParserDelegate protocol that can build
 * OFXMLElements from the document parsed by the OFXMLParser.
 *
 * It can also be used to build OFXMLElements from parts of the document by
 * first parsing stuff using the OFXMLParser with another delegate and then
 * setting the OFXMLElementBuilder as delegate for the parser.
 */
@interface OFXMLElementBuilder: OFObject <OFXMLParserDelegate>
{
	OFMutableArray OF_GENERIC(OFXMLElement*) *_stack;
	id <OFXMLElementBuilderDelegate> _delegate;
}

/*!
 * The delegate for the OFXMLElementBuilder.
 */
@property OF_NULLABLE_PROPERTY (assign)
    id <OFXMLElementBuilderDelegate> delegate;

/*!
 * @brief Creates a new element builder.
 *
 * @return A new, autoreleased OFXMLElementBuilder
 */
+ (instancetype)elementBuilder;
@end

@interface OFObject (OFXMLElementBuilderDelegate) <OFXMLElementBuilderDelegate>
@end

OF_ASSUME_NONNULL_END