Merge pull request #1223 from arekdygas/issue-1221

FlorianRappl · web-flow · commit b278c49f6650 · 2025-04-16T00:53:28.000+02:00
GetAttributeNode extension methods added to Element
diff --git a/src/AngleSharp.Core.Tests/Library/DOMActions.cs b/src/AngleSharp.Core.Tests/Library/DOMActions.cs
@@ -1422,5 +1422,30 @@ public async Task SettingTemplateContentUsingInnerHtmlWorks_Issue1072()
             Assert.IsNotNull(template.Content.FirstChild);
             Assert.AreEqual(0, template.ChildNodes.Length);
         }
+
+        [Test]
+        public void GetAttributeNode()
+        {
+            var ns = "http://anglesharp.com/ns";
+
+            var parser = new HtmlParser();
+            var document = parser.ParseDocument("<html><head></head><body></body></html>");
+
+            var div = document.CreateElement("div");
+            var attributeValue = "abc";
+            div.SetAttribute(ns, "test:name", attributeValue);
+
+            var attrByName = div.GetAttributeNode("name");
+            var attrByPrefixAndName = div.GetAttributeNode("test:name");
+            var attrByNamespaceAndName = div.GetAttributeNode(ns, "name");
+            var attrByNamespaceAndPrefixAndName = div.GetAttributeNode(ns, "test:name");
+
+            Assert.IsNull(attrByName);
+            Assert.IsNotNull(attrByPrefixAndName);
+            Assert.IsNotNull(attrByNamespaceAndName);
+            Assert.IsNull(attrByNamespaceAndPrefixAndName);
+            Assert.AreEqual(attributeValue, attrByPrefixAndName.Value);
+            Assert.AreEqual(attrByPrefixAndName, attrByNamespaceAndName);
+        }
     }
 }
diff --git a/src/AngleSharp/Dom/DomElementExtensions.cs b/src/AngleSharp/Dom/DomElementExtensions.cs
@@ -0,0 +1,62 @@
+namespace AngleSharp.Dom
+{
+    using AngleSharp.Attributes;
+    using AngleSharp.Text;
+    using System;
+
+    /// <summary>
+    /// Element extensions exposed to DOM.
+    /// </summary>
+    [DomExposed("Element")]
+    public static class DomElementExtensions
+    {
+        /// <summary>
+        /// Returns the named attribute on the specified element.
+        /// </summary>
+        /// <param name="element">
+        /// Current element
+        /// </param>
+        /// <param name="name">
+        /// The name of the attribute you want to get.
+        /// </param>
+        /// <returns>
+        /// Named attribute or null if it doesn't exist.
+        /// </returns>
+        [DomName("getAttributeNode")]
+        public static IAttr? GetAttributeNode(this IElement element, String name)
+        {
+            if (element.GivenNamespaceUri.Is(NamespaceNames.HtmlUri))
+            {
+                name = name.HtmlLower();
+            }
+
+            return element.Attributes.GetNamedItem(name);
+        }
+
+        /// <summary>
+        /// Returns the named attribute on the specified element.
+        /// </summary>
+        /// <param name="element">
+        /// Current element
+        /// </param>
+        /// <param name="namespaceUri">
+        /// A string specifying the namespace of the attribute.
+        /// </param>
+        /// <param name="localName">
+        /// The name of the attribute you want to get.
+        /// </param>
+        /// <returns>
+        /// Named attribute or null if it doesn't exist.
+        /// </returns>
+        [DomName("getAttributeNodeNS")]
+        public static IAttr? GetAttributeNode(this IElement element, String? namespaceUri, String localName)
+        {
+            if (String.IsNullOrEmpty(namespaceUri))
+            {
+                namespaceUri = null;
+            }
+
+            return element.Attributes.GetNamedItem(namespaceUri, localName);
+        }
+    }
+}
