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Poco::XML::DocumentFragment Class Reference

#include <DocumentFragment.h>

Inheritance diagram for Poco::XML::DocumentFragment:

Poco::XML::AbstractContainerNode Poco::XML::AbstractNode Poco::XML::Node Poco::XML::EventTarget Poco::XML::DOMObject

List of all members.


Detailed Description

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.

Definition at line 52 of file DocumentFragment.h.


Public Types

enum  {
  ELEMENT_NODE = 1, ATTRIBUTE_NODE, TEXT_NODE, CDATA_SECTION_NODE,
  ENTITY_REFERENCE_NODE, ENTITY_NODE, PROCESSING_INSTRUCTION_NODE, COMMENT_NODE,
  DOCUMENT_NODE, DOCUMENT_TYPE_NODE, DOCUMENT_FRAGMENT_NODE, NOTATION_NODE
}

Public Member Functions

void addEventListener (const XMLString &type, EventListener *listener, bool useCapture)
NodeappendChild (Node *newChild)
NamedNodeMapattributes () const
virtual void autoRelease ()
NodeListchildNodes () const
NodecloneNode (bool deep) const
bool dispatchEvent (Event *evt)
void duplicate () const
NodefirstChild () const
const XMLString & getNodeValue () const
 Returns the value of this node, depending on its type.
bool hasAttributes () const
 Returns the local name of the node.
bool hasChildNodes () const
XMLString innerText () const
 Returns whether this node (if it is an element) has any attributes.
NodeinsertBefore (Node *newChild, Node *refChild)
bool isSupported (const XMLString &feature, const XMLString &version) const
NodelastChild () const
const XMLString & localName () const
 Returns the namespace prefix from the qualified name of the node.
const XMLString & namespaceURI () const
NodenextSibling () const
const XMLString & nodeName () const
unsigned short nodeType () const
const XMLString & nodeValue () const
 Returns the name of this node, depending on its type.
void normalize ()
DocumentownerDocument () const
NodeparentNode () const
 Returns a code representing the type of the underlying object.
XMLString prefix () const
NodepreviousSibling () const
void release () const
 Increases the object's reference count.
NoderemoveChild (Node *oldChild)
void removeEventListener (const XMLString &type, EventListener *listener, bool useCapture)
NodereplaceChild (Node *newChild, Node *oldChild)
void setNodeValue (const XMLString &value)
 Returns the value of this node, depending on its type.

Protected Member Functions

void bubbleEvent (Event *evt)
void captureEvent (Event *evt)
NodecopyNode (bool deep, Document *pOwnerDocument) const
void dispatchAttrModified (Attr *pAttr, MutationEvent::AttrChangeType changeType, const XMLString &prevValue, const XMLString &newValue)
void dispatchCharacterDataModified (const XMLString &prevValue, const XMLString &newValue)
void dispatchNodeInserted ()
void dispatchNodeInsertedIntoDocument ()
void dispatchNodeRemoved ()
void dispatchNodeRemovedFromDocument ()
void dispatchSubtreeModified ()
 DocumentFragment (Document *pOwnerDocument, const DocumentFragment &fragment)
 DocumentFragment (Document *pOwnerDocument)
virtual bool events () const
virtual bool eventsSuspended () const
void setOwnerDocument (Document *pOwnerDocument)

Static Protected Attributes

static const XMLString EMPTY_STRING

Static Private Attributes

static const XMLString NODE_NAME = toXMLString("#document-fragment")

Friends

class Document

The documentation for this class was generated from the following files:

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