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AngleSharp

, 3 Jul 2013
Bringing the DOM to C# with a HTML5/CSS3 parser written in C#.
Demo.zip
AngleSharp
Css
Tokens
DOM
Collections
Css
Properties
Rules
Selector
Values
Enums
Exception
Html
Basic
Formatting
Forms
Frames
Head
Lists
Media
Objects
Semantic
Tables
Interfaces
Mathml
Objects
Svg
Various
Xml
Foundation
Attributes
Helpers
Mutations
Html
Tokens
Properties
Stream
Xml
Tokens
packages
ModernUI.WPF.1.0.4
lib
net40
FirstFloor.ModernUI.dll
Microsoft.Windows.Shell.dll
net45
FirstFloor.ModernUI.dll
ModernUI.WPF.1.0.4.nupkg
ModernUI.WPF.1.0.4.nuspec
OxyPlot.Core.2013.1.49.1
lib
portable-net4+sl4+wp71+win8
OxyPlot.dll
OxyPlot.Core.2013.1.49.1.nupkg
OxyPlot.Core.2013.1.49.1.nuspec
OxyPlot.Wpf.2013.1.49.1
lib
NET40
OxyPlot.Wpf.dll
OxyPlot.Xps.dll
NET45
OxyPlot.Wpf.dll
OxyPlot.Xps.dll
OxyPlot.Wpf.2013.1.49.1.nupkg
OxyPlot.Wpf.2013.1.49.1.nuspec
Samples
Logo.ico
Pages
Properties
Settings.settings
ViewModels
Source.zip
Documents
using System;

namespace AngleSharp.DOM
{
    /// <summary>
    /// Represents the document type node.
    /// </summary>
    [DOM("DocumentType")]
    public sealed class DocumentType : Node
    {
        #region Constants

        /// <summary>
        /// Gets the !DOCTYPE constant.
        /// </summary>
        internal const string Tag = "!DOCTYPE";

        #endregion

        #region ctor

        /// <summary>
        /// Creates a new document type node.
        /// </summary>
        internal DocumentType()
        {
            _type = NodeType.DocumentType;
            _name = Tag;
        }

        #endregion

        #region Properties

        /// <summary>
        /// Gets or sets the name of the document type.
        /// </summary>
        [DOM("name")]
        public String Name 
        {
            get; 
            set; 
        }

        /// <summary>
        /// Gets or sets the public ID of the document type.
        /// </summary>
        [DOM("publicId")]
        public String PublicId 
        { 
            get; 
            set; 
        }

        /// <summary>
        /// Gets or sets the system ID of the document type.
        /// </summary>
        [DOM("systemId")]
        public String SystemId 
        { 
            get; 
            set; 
        }

        /// <summary>
        /// Gets or sets the internal subset of the document type.
        /// </summary>
        [DOM("internalSubset")]
        public String InternalSubset 
        { 
            get; 
            set; 
        }

        #endregion

        #region Methods

        /// <summary>
        /// Adds a child to the collection of children.
        /// </summary>
        /// <param name="child">The child to add.</param>
        /// <returns>The added child.</returns>
        [DOM("appendChild")]
        public override Node AppendChild(Node child)
        {
            throw new DOMException(ErrorCode.NotSupported);
        }

        /// <summary>
        /// Inserts the specified node before a reference element as a child of the current node.
        /// </summary>
        /// <param name="newElement">The node to insert.</param>
        /// <param name="referenceElement">The node before which newElement is inserted. If
        /// referenceElement is null, newElement is inserted at the end of the list of child nodes.</param>
        /// <returns>The inserted node.</returns>
        [DOM("insertBefore")]
        public override Node InsertBefore(Node newElement, Node referenceElement)
        {
            throw new DOMException(ErrorCode.NotSupported);
        }

        /// <summary>
        /// Inserts a child to the collection of children at the specified index.
        /// </summary>
        /// <param name="index">The index where to insert.</param>
        /// <param name="child">The child to insert.</param>
        /// <returns>The inserted child.</returns>
        [DOM("insertChild")]
        public override Node InsertChild(int index, Node child)
        {
            throw new DOMException(ErrorCode.NotSupported);
        }

        /// <summary>
        /// Removes a child from the collection of children.
        /// </summary>
        /// <param name="child">The child to remove.</param>
        /// <returns>The removed child.</returns>
        [DOM("removeChild")]
        public override Node RemoveChild(Node child)
        {
            throw new DOMException(ErrorCode.NotSupported);
        }

        /// <summary>
        /// Replaces one child node of the specified element with another.
        /// </summary>
        /// <param name="newChild">The new node to replace oldChild. If it already exists in the DOM, it is first removed.</param>
        /// <param name="oldChild">The existing child to be replaced.</param>
        /// <returns>The replaced node. This is the same node as oldChild.</returns>
        [DOM("replaceChild")]
        public override Node ReplaceChild(Node newChild, Node oldChild)
        {
            throw new DOMException(ErrorCode.NotSupported);
        }

        /// <summary>
        /// Returns a duplicate of the node on which this method was called.
        /// </summary>
        /// <param name="deep">Optional value: true if the children of the node should also be cloned, or false to clone only the specified node.</param>
        /// <returns>The duplicate node.</returns>
        [DOM("cloneNode")]
        public override Node CloneNode(Boolean deep = true)
        {
            var node = new DocumentType();
            CopyProperties(this, node, deep);
            node.Name = this.Name;
            node.PublicId = this.PublicId;
            node.SystemId = this.SystemId;
            node.InternalSubset = this.InternalSubset;
            return node;
        }

        /// <summary>
        /// Takes a prefix and returns the namespaceURI associated with it on the given node if found (and null if not).
        /// Supplying null for the prefix will return the default namespace.
        /// </summary>
        /// <param name="prefix">The prefix to look for.</param>
        /// <returns>The namespace URI.</returns>
        [DOM("lookupNamespaceURI")]
        public override String LookupNamespaceURI(String prefix)
        {
            return null;
        }

        /// <summary>
        /// Returns the prefix for a given namespaceURI if present, and null if not. When multiple prefixes are possible,
        /// the result is implementation-dependent.
        /// </summary>
        /// <param name="namespaceURI">The namespaceURI to lookup.</param>
        /// <returns>The prefix.</returns>
        [DOM("lookupPrefix")]
        public override String LookupPrefix(String namespaceURI)
        {
            return null;
        }

        /// <summary>
        /// Accepts a namespace URI as an argument and returns true if the namespace is the default namespace on the given node or false if not.
        /// </summary>
        /// <param name="namespaceURI">A string representing the namespace against which the element will be checked.</param>
        /// <returns>True if the given namespaceURI is the default namespace.</returns>
        [DOM("isDefaultNamespace")]
        public override Boolean IsDefaultNamespace(String namespaceURI)
        {
            return false;
        }

        /// <summary>
        /// Inserts nodes before the current doctype.
        /// </summary>
        /// <param name="nodes">The nodes to insert before.</param>
        /// <returns>The current doctype.</returns>
        [DOM("before")]
        public DocumentType Before(params Node[] nodes)
        {
            if (_parent != null && nodes.Length > 0)
            {
                var node = MutationMacro(nodes);
                _parent.InsertBefore(node, this);
            }

            return this;
        }

        /// <summary>
        /// Inserts nodes after the current doctype.
        /// </summary>
        /// <param name="nodes">The nodes to insert after.</param>
        /// <returns>The current doctype.</returns>
        [DOM("after")]
        public DocumentType After(params Node[] nodes)
        {
            if (_parent != null && nodes.Length > 0)
            {
                var node = MutationMacro(nodes);
                _parent.InsertBefore(node, NextSibling);
            }

            return this;
        }

        /// <summary>
        /// Replaces the current doctype with the nodes.
        /// </summary>
        /// <param name="nodes">The nodes to replace.</param>
        /// <returns>The current doctype.</returns>
        [DOM("replace")]
        public DocumentType Replace(params Node[] nodes)
        {
            if (_parent != null && nodes.Length > 0)
            {
                var node = MutationMacro(nodes);
                _parent.ReplaceChild(node, this);
            }

            return this;
        }

        /// <summary>
        /// Removes the current doctype from the parent.
        /// </summary>
        /// <returns>The current doctype.</returns>
        [DOM("remove")]
        public DocumentType Remove()
        {
            if (_parent != null)
                _parent.RemoveChild(this);

            return this;
        }

        #endregion

        #region String representation

        /// <summary>
        /// Returns an HTML-code representation of the node.
        /// </summary>
        /// <returns>A string containing the HTML code.</returns>
        public override String ToHtml()
        {
            return String.Format("<!DOCTYPE html{0}{1}>", 
                String.IsNullOrEmpty(PublicId) ? "" : " PUBLIC \"" + PublicId + "\"", 
                String.IsNullOrEmpty(SystemId) ? "" : (String.IsNullOrEmpty(PublicId) ? " SYSTEM" : "") + " \"" + SystemId + "\"");
        }

        #endregion
    }
}

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License

This article, along with any associated source code and files, is licensed under The BSD License

About the Author

Florian Rappl
Chief Technology Officer
Germany Germany
Florian is from Regensburg, Germany. He started his programming career with Perl. After programming C/C++ for some years he discovered his favorite programming language C#. He did work at Siemens as a programmer until he decided to study Physics. During his studies he worked as an IT consultant for various companies.
 
Florian is also giving lectures in C#, HTML5 with CSS3 and JavaScript, and other topics. Having graduated from University with a Master's degree in theoretical physics he is currently busy doing his PhD in the field of High Performance Computing.
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