mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-04 23:50:50 +00:00
87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
//
|
|
// DocumentFragment.h
|
|
//
|
|
// $Id: //poco/1.4/XML/include/Poco/DOM/DocumentFragment.h#1 $
|
|
//
|
|
// Library: XML
|
|
// Package: DOM
|
|
// Module: DOM
|
|
//
|
|
// Definition of the DOM DocumentFragment class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef DOM_DocumentFragment_INCLUDED
|
|
#define DOM_DocumentFragment_INCLUDED
|
|
|
|
|
|
#include "Poco/XML/XML.h"
|
|
#include "Poco/DOM/AbstractContainerNode.h"
|
|
#include "Poco/XML/XMLString.h"
|
|
|
|
|
|
namespace Poco {
|
|
namespace XML {
|
|
|
|
|
|
class XML_API DocumentFragment: public AbstractContainerNode
|
|
/// DocumentFragment is a "lightweight" or "minimal" Document object. It is
|
|
/// very common to want to be able to extract a portion of a document's tree
|
|
/// or to create a new fragment of a document. Imagine implementing a user command
|
|
/// like cut or rearranging a document by moving fragments around. It is desirable
|
|
/// to have an object which can hold such fragments and it is quite natural
|
|
/// to use a Node for this purpose. While it is true that a Document object
|
|
/// could fulfill this role, a Document object can potentially be a heavyweight
|
|
/// object, depending on the underlying implementation. What is really needed
|
|
/// for this is a very lightweight object. DocumentFragment is such an object.
|
|
///
|
|
/// Furthermore, various operations -- such as inserting nodes as children of
|
|
/// another Node -- may take DocumentFragment objects as arguments; this results
|
|
/// in all the child nodes of the DocumentFragment being moved to the child
|
|
/// list of this node.
|
|
///
|
|
/// The children of a DocumentFragment node are zero or more nodes representing
|
|
/// the tops of any sub-trees defining the structure of the document. DocumentFragment
|
|
/// nodes do not need to be well-formed XML documents (although they do need
|
|
/// to follow the rules imposed upon well-formed XML parsed entities, which
|
|
/// can have multiple top nodes). For example, a DocumentFragment might have
|
|
/// only one child and that child node could be a Text node. Such a structure
|
|
/// model represents neither an HTML document nor a well-formed XML document.
|
|
///
|
|
/// When a DocumentFragment is inserted into a Document (or indeed any other
|
|
/// Node that may take children) the children of the DocumentFragment and not
|
|
/// the DocumentFragment itself are inserted into the Node. This makes the DocumentFragment
|
|
/// very useful when the user wishes to create nodes that are siblings; the
|
|
/// DocumentFragment acts as the parent of these nodes so that the user can
|
|
/// use the standard methods from the Node interface, such as insertBefore and
|
|
/// appendChild.
|
|
{
|
|
public:
|
|
// Node
|
|
const XMLString& nodeName() const;
|
|
unsigned short nodeType() const;
|
|
|
|
protected:
|
|
DocumentFragment(Document* pOwnerDocument);
|
|
DocumentFragment(Document* pOwnerDocument, const DocumentFragment& fragment);
|
|
~DocumentFragment();
|
|
|
|
Node* copyNode(bool deep, Document* pOwnerDocument) const;
|
|
|
|
private:
|
|
static const XMLString NODE_NAME;
|
|
|
|
friend class Document;
|
|
};
|
|
|
|
|
|
} } // namespace Poco::XML
|
|
|
|
|
|
#endif // DOM_DocumentFragment_INCLUDED
|