DOM::Attr

#include <dom_element.h>

Inheritance diagram for DOM::Attr:

Public Member Functions

 Attr (const Node &other)
 
 Attr (const Attr &other)
 
DOMString name () const
 
Attroperator= (const Node &other)
 
Attroperator= (const Attr &other)
 
Element ownerElement () const
 
void setValue (const DOMString &)
 
bool specified () const
 
DOMString value () const
 
- Public Member Functions inherited from DOM::Node
 Node (const Node &other)
 
 Node (NodeImpl *_impl)
 
void addEventListener (const DOMString &type, EventListener *listener, const bool useCapture)
 
Node appendChild (const Node &newChild)
 
void applyChanges ()
 
NamedNodeMap attributes () const
 
NodeList childNodes () const
 
Node cloneNode (bool deep)
 
unsigned compareDocumentPosition (const DOM::Node &other)
 
bool dispatchEvent (const Event &evt)
 
quint32 elementId () const
 
Node firstChild () const
 
KHTML_DEPRECATED void getCursor (int offset, int &_x, int &_y, int &height)
 
QRect getRect ()
 
NodeImpl * handle () const
 
bool hasAttributes ()
 
bool hasChildNodes ()
 
unsigned long index () const
 
Node insertBefore (const Node &newChild, const Node &refChild)
 
bool isNull () const
 
bool isSupported (const DOMString &feature, const DOMString &version) const
 
Node lastChild () const
 
DOMString localName () const
 
DOMString namespaceURI () const
 
Node nextSibling () const
 
DOMString nodeName () const
 
unsigned short nodeType () const
 
DOMString nodeValue () const
 
void normalize ()
 
bool operator!= (const Node &other) const
 
Nodeoperator= (const Node &other)
 
bool operator== (const Node &other) const
 
Document ownerDocument () const
 
Node parentNode () const
 
DOMString prefix () const
 
Node previousSibling () const
 
Node removeChild (const Node &oldChild)
 
void removeEventListener (const DOMString &type, EventListener *listener, bool useCapture)
 
Node replaceChild (const Node &newChild, const Node &oldChild)
 
void setNodeValue (const DOMString &)
 
void setPrefix (const DOMString &prefix)
 
void setTextContent (const DOMString &text)
 
DOMString textContent () const
 
KHTML_DEPRECATED QString toHTML ()
 

Protected Member Functions

 Attr (AttrImpl *_impl)
 

Additional Inherited Members

- Public Types inherited from DOM::Node
enum  DocumentPosition {
  DOCUMENT_POSITION_DISCONNECTED = 0x01, DOCUMENT_POSITION_PRECEDING = 0x02, DOCUMENT_POSITION_FOLLOWING = 0x04, DOCUMENT_POSITION_CONTAINS = 0x08,
  DOCUMENT_POSITION_CONTAINED_BY = 0x10, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20
}
 
enum  NodeType {
  ELEMENT_NODE = 1, ATTRIBUTE_NODE = 2, TEXT_NODE = 3, CDATA_SECTION_NODE = 4,
  ENTITY_REFERENCE_NODE = 5, ENTITY_NODE = 6, PROCESSING_INSTRUCTION_NODE = 7, COMMENT_NODE = 8,
  DOCUMENT_NODE = 9, DOCUMENT_TYPE_NODE = 10, DOCUMENT_FRAGMENT_NODE = 11, NOTATION_NODE = 12,
  XPATH_NAMESPACE_NODE = 13
}
 
- Protected Attributes inherited from DOM::Node
NodeImpl * impl
 

Detailed Description

The Attr interface represents an attribute in an Element object.

Typically the allowable values for the attribute are defined in a document type definition.

Attr objects inherit the Node interface, but since they are not actually child nodes of the element they describe, the DOM does not consider them part of the document tree. Thus, the Node attributes parentNode , previousSibling , and nextSibling have a null value for Attr objects. The DOM takes the view that attributes are properties of elements rather than having a separate identity from the elements they are associated with; this should make it more efficient to implement such features as default attributes associated with all elements of a given type. Furthermore, Attr nodes may not be immediate children of a DocumentFragment . However, they can be associated with Element nodes contained within a DocumentFragment . In short, users and implementors of the DOM need to be aware that Attr nodes have some things in common with other objects inheriting the Node interface, but they also are quite distinct.

The attribute's effective value is determined as follows: if this attribute has been explicitly assigned any value, that value is the attribute's effective value; otherwise, if there is a declaration for this attribute, and that declaration includes a default value, then that default value is the attribute's effective value; otherwise, the attribute does not exist on this element in the structure model until it has been explicitly added. Note that the nodeValue attribute on the Attr instance can also be used to retrieve the string version of the attribute's value(s).

In XML, where the value of an attribute can contain entity references, the child nodes of the Attr node provide a representation in which entity references are not expanded. These child nodes may be either Text or EntityReference nodes. Because the attribute type may be unknown, there are no tokenized attribute values.

Definition at line 89 of file dom_element.h.

Member Function Documentation

DOMString Attr::name ( ) const

Returns the name of this attribute.

Definition at line 72 of file dom_element.cpp.

Element Attr::ownerElement ( ) const

Introduced in DOM Level 2.

The Element node this attribute is attached to or null if this attribute is not in use.

Definition at line 88 of file dom_element.cpp.

void Attr::setValue ( const DOMString newValue)

see value

Definition at line 104 of file dom_element.cpp.

bool Attr::specified ( ) const

If this attribute was explicitly given a value in the original document, this is true ; otherwise, it is false .

Note that the implementation is in charge of this attribute, not the user. If the user changes the value of the attribute (even if it ends up having the same value as the default value) then the specified flag is automatically flipped to true . To re-specify the attribute as the default value from the DTD, the user must delete the attribute. The implementation will then make a new attribute available with specified set to false and the default value (if one exists).

In summary:

  • If the attribute has an assigned value in the document then specified is true , and the value is the assigned value.
  • If the attribute has no assigned value in the document and has a default value in the DTD, then specified is false , and the value is the default value in the DTD.
  • If the attribute has no assigned value in the document and has a value of #IMPLIED in the DTD, then the attribute does not appear in the structure model of the document.

Definition at line 80 of file dom_element.cpp.

DOMString Attr::value ( ) const

On retrieval, the value of the attribute is returned as a string.

Character and general entity references are replaced with their values.

On setting, this creates a Text node with the unparsed contents of the string.

Definition at line 96 of file dom_element.cpp.


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