using AngleSharp.Dom.Events; using AngleSharp.Extensions; using AngleSharp.Network; using AngleSharp.Parser.Html; using System; using System.Threading; using System.Threading.Tasks; namespace AngleSharp.Dom.Html { internal sealed class HtmlDocument : Document, IHtmlDocument, IDocument, INode, IEventTarget, IMarkupFormattable, IParentNode, IGlobalEventHandlers, IDocumentStyle, INonElementParentNode, IDisposable { public override IElement DocumentElement => this.FindChild<HtmlHtmlElement>(); public override string Title { get { IHtmlTitleElement htmlTitleElement = DocumentElement.FindDescendant<IHtmlTitleElement>(); if (htmlTitleElement != null) return htmlTitleElement.TextContent.CollapseAndStrip(); return string.Empty; } set { IHtmlTitleElement htmlTitleElement = DocumentElement.FindDescendant<IHtmlTitleElement>(); if (htmlTitleElement == null) { IHtmlHeadElement head = base.Head; if (head == null) return; htmlTitleElement = new HtmlTitleElement(this, null); head.AppendChild(htmlTitleElement); } htmlTitleElement.TextContent = value; } } internal HtmlDocument(IBrowsingContext context, TextSource source) : base(context ?? BrowsingContext.New(null), source) { base.ContentType = MimeTypeNames.Html; } internal HtmlDocument(IBrowsingContext context = null) : this(context, new TextSource(string.Empty)) { } public override INode Clone(bool deep = true) { TextSource source = new TextSource(base.Source.Text); HtmlDocument htmlDocument = new HtmlDocument(base.Context, source); CloneDocument(htmlDocument, deep); return htmlDocument; } internal static async Task<IDocument> LoadAsync(IBrowsingContext context, CreateDocumentOptions options, CancellationToken cancelToken) { bool scripting = context.Configuration.IsScripting(); HtmlParserOptions parserOptions = new HtmlParserOptions { IsScripting = scripting }; HtmlDocument document = new HtmlDocument(context, options.Source); HtmlDomBuilder parser = new HtmlDomBuilder(document) { Error = (EventHandler<HtmlErrorEvent>)delegate(object _, HtmlErrorEvent error) { context.Fire(error); } }; document.Setup(options); context.NavigateTo(document); context.Fire(new HtmlParseEvent(document, false)); await parser.ParseAsync(parserOptions, cancelToken).ConfigureAwait(false); context.Fire(new HtmlParseEvent(document, true)); return document; } } }