Add SelectNodes method

Author: Denis Ivanov

src/AngleSharp.XPath.Tests/HtmlDocumentNavigatorTests.cs

@@ -3,6 +3,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using AngleSharp.Parser.Html;
 using AngleSharp.XPath;
 
 namespace AngleSharp.XPath.Tests
@@ -24,5 +25,25 @@ public async Task SelectSinleNodeTest()
 			// Assert
 			Assert.That(content, Is.Not.Null);
 		}
+
+		[Test]
+		public void SelectNodes_SelectList_ShouldReturnList()
+		{
+			// Arrange
+			const string html = 
+			@"<ol>
+				<li>First</li>
+				<li>Second</li>
+				<li>Third</li>
+			</ol>";
+			var parser = new HtmlParser();
+			var document = parser.Parse(html);
+
+			// Act
+			var nodes = document.DocumentElement.SelectNodes("//li");
+
+			// Assert
+			Assert.That(nodes, Has.Count.EqualTo(3));
+		}
 	}
 }

src/AngleSharp.XPath/AngleSharp.XPath.csproj

@@ -3,8 +3,8 @@
     <Version>1.0.0</Version>
     <Authors>Denis Ivanov</Authors>
     <PackageId>AngleSharp.XPath</PackageId>
-    <AssemblyVersion>1.0.0</AssemblyVersion>
-    <FileVersion>1.0.0</FileVersion>
+    <AssemblyVersion>1.0.1</AssemblyVersion>
+    <FileVersion>1.0.1</FileVersion>
     <Description>XPath support for AngleSharp</Description>
     <PackageProjectUrl>https://github.com/denis-ivanov/AngleSharp.XPath/</PackageProjectUrl>
     <PackageTags>HTML XPath AngleSharp</PackageTags>

src/AngleSharp.XPath/Extensions.cs

@@ -1,6 +1,8 @@
 using AngleSharp.Dom;
 using AngleSharp.Dom.Html;
 using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
 using System.Diagnostics;
 using System.Xml;
 using System.Xml.XPath;
@@ -22,7 +24,7 @@ public static XPathNavigator CreateNavigator(this IHtmlDocument document)
 		[DebuggerStepThrough]
 		public static string GetOrAdd(this XmlNameTable table, string array)
 		{
-			string s = table.Get(array);
+			var s = table.Get(array);
 
 			if (s == null)
 			{
@@ -55,5 +57,38 @@ public static INode SelectSingleNode(this IElement element, string xpath)
 			var node = (HtmlDocumentNavigator)it.Current;
 			return node.CurrentNode;
 		}
+
+		/// <summary>
+		/// Selects a list of nodes matching the <see cref="XPath"/> expression.
+		/// </summary>
+		/// <param name="element"></param>
+		/// <param name="xpath">The XPath expression.</param>
+		/// <returns>List of nodes matching <paramref name="xpath"/> query.</returns>
+		/// <exception cref="ArgumentNullException">Throws if <paramref name="element"/> or <paramref name="xpath"/> is <c>null</c></exception>
+		public static List<INode> SelectNodes(this IElement element, string xpath)
+		{
+			if (element == null)
+			{
+				throw new ArgumentNullException(nameof(element));
+			}
+
+			if (xpath == null)
+			{
+				throw new ArgumentNullException(nameof(xpath));
+			}
+			
+			var nav = new HtmlDocumentNavigator(element.Owner, element);
+			var it = nav.Select(xpath);
+			var result = new List<INode>();
+
+			while (it.MoveNext())
+			{
+				var naviagtor = (HtmlDocumentNavigator) it.Current;
+				var e = naviagtor.CurrentNode;
+				result.Add(e);
+			}
+
+			return result;
+		}
 	}
 }