Attr
Represents a generic node attribute.
using AngleSharp.Dom.Events;
using AngleSharp.Text;
using System;
using System.IO;
using System.Runtime.CompilerServices;
namespace AngleSharp.Dom
{
[System.Runtime.CompilerServices.NullableContext(1)]
[System.Runtime.CompilerServices.Nullable(0)]
public sealed class Attr : IAttr, INode, IEventTarget, IMarkupFormattable, IEquatable<IAttr>
{
private readonly string _localName;
[System.Runtime.CompilerServices.Nullable(2)]
private readonly string _prefix;
[System.Runtime.CompilerServices.Nullable(2)]
private readonly string _namespace;
private string _value;
[System.Runtime.CompilerServices.Nullable(2)]
[field: System.Runtime.CompilerServices.Nullable(2)]
internal NamedNodeMap Container {
[System.Runtime.CompilerServices.NullableContext(2)]
get;
[System.Runtime.CompilerServices.NullableContext(2)]
set;
}
public bool IsSpecified => true;
[System.Runtime.CompilerServices.Nullable(2)]
public IElement OwnerElement {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return Container?.Owner;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
public string Prefix {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return _prefix;
}
}
public bool IsId {
get {
if (_prefix == null)
return _localName.Isi(AttributeNames.Id);
return false;
}
}
public bool Specified => !string.IsNullOrEmpty(_value);
public string Name {
get {
if (_prefix != null)
return _prefix + ":" + _localName;
return _localName;
}
}
public string Value {
get {
return _value;
}
set {
string value2 = _value;
_value = value;
Container?.RaiseChangedEvent(this, value, value2);
}
}
public string LocalName => _localName;
[System.Runtime.CompilerServices.Nullable(2)]
public string NamespaceUri {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return _namespace;
}
}
string INode.BaseUri {
get {
return OwnerElement.BaseUri;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
Url INode.BaseUrl {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return OwnerElement?.BaseUrl;
}
}
string INode.NodeName {
get {
return Name;
}
}
INodeList INode.ChildNodes {
get {
return NodeList.Empty;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
IDocument INode.Owner {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return OwnerElement?.Owner;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
IElement INode.ParentElement {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return null;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
INode INode.Parent {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return null;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
INode INode.FirstChild {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return null;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
INode INode.LastChild {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return null;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
INode INode.NextSibling {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return null;
}
}
[System.Runtime.CompilerServices.Nullable(2)]
INode INode.PreviousSibling {
[System.Runtime.CompilerServices.NullableContext(2)]
get {
return null;
}
}
NodeType INode.NodeType {
get {
return NodeType.Attribute;
}
}
string INode.NodeValue {
get {
return Value;
}
set {
Value = value;
}
}
string INode.TextContent {
get {
return Value;
}
set {
Value = value;
}
}
bool INode.HasChildNodes {
get {
return false;
}
}
NodeFlags INode.Flags {
get {
throw new NotImplementedException();
}
}
public Attr(string localName)
: this(localName, string.Empty)
{
}
public Attr(string localName, string value)
{
_localName = localName;
_value = value;
}
public Attr([System.Runtime.CompilerServices.Nullable(2)] string prefix, string localName, string value, [System.Runtime.CompilerServices.Nullable(2)] string namespaceUri)
{
_prefix = prefix;
_localName = localName;
_value = value;
_namespace = namespaceUri;
}
public bool Equals(IAttr other)
{
if (Prefix.Is(other.Prefix) && NamespaceUri.Is(other.NamespaceUri))
return Value.Is(other.Value);
return false;
}
public override int GetHashCode()
{
return (((1 * 31 + _localName.GetHashCode()) * 31 + (_value ?? string.Empty).GetHashCode()) * 31 + (_namespace ?? string.Empty).GetHashCode()) * 31 + (_prefix ?? string.Empty).GetHashCode();
}
INode INode.Clone(bool deep)
{
return new Attr(_prefix, _localName, _value, _namespace);
}
bool INode.Equals(INode otherNode)
{
IAttr attr = otherNode as IAttr;
if (attr != null)
return Equals(attr);
return false;
}
DocumentPositions INode.CompareDocumentPosition(INode otherNode)
{
return OwnerElement?.CompareDocumentPosition(otherNode) ?? DocumentPositions.Disconnected;
}
void INode.Normalize()
{
}
bool INode.Contains(INode otherNode)
{
return false;
}
bool INode.IsDefaultNamespace(string namespaceUri)
{
return OwnerElement?.IsDefaultNamespace(namespaceUri) ?? false;
}
[return: System.Runtime.CompilerServices.Nullable(2)]
string INode.LookupNamespaceUri(string prefix)
{
return OwnerElement?.LookupNamespaceUri(prefix);
}
[return: System.Runtime.CompilerServices.Nullable(2)]
string INode.LookupPrefix(string namespaceUri)
{
return OwnerElement?.LookupPrefix(namespaceUri);
}
INode INode.AppendChild(INode child)
{
throw new DomException(DomError.NotSupported);
}
INode INode.InsertBefore(INode newElement, [System.Runtime.CompilerServices.Nullable(2)] INode referenceElement)
{
throw new DomException(DomError.NotSupported);
}
INode INode.RemoveChild(INode child)
{
throw new DomException(DomError.NotSupported);
}
INode INode.ReplaceChild(INode newChild, INode oldChild)
{
throw new DomException(DomError.NotSupported);
}
void IEventTarget.AddEventListener(string type, [System.Runtime.CompilerServices.Nullable(2)] DomEventHandler callback, bool capture)
{
throw new DomException(DomError.NotSupported);
}
void IEventTarget.RemoveEventListener(string type, [System.Runtime.CompilerServices.Nullable(2)] DomEventHandler callback, bool capture)
{
throw new DomException(DomError.NotSupported);
}
void IEventTarget.InvokeEventListener(Event ev)
{
throw new DomException(DomError.NotSupported);
}
bool IEventTarget.Dispatch(Event ev)
{
throw new DomException(DomError.NotSupported);
}
void IMarkupFormattable.ToHtml(TextWriter writer, IMarkupFormatter formatter)
{
}
}
}