From 8bfbc100490b5ba5f0a7f803910c4b2e18040fd6 Mon Sep 17 00:00:00 2001
From: Joe Clapis <jclapis@outlook.com>
Date: Sat, 8 Feb 2020 15:43:14 -0500
Subject: [PATCH] Added the ScrollToHome() and ScrollToEnd() methods to
 ScrollViewer.

---
 src/Avalonia.Controls/ScrollViewer.cs         | 16 +++++++++++++
 .../ScrollViewerTests.cs                      | 24 +++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/src/Avalonia.Controls/ScrollViewer.cs b/src/Avalonia.Controls/ScrollViewer.cs
index 4fae867dbd..3d508d8b68 100644
--- a/src/Avalonia.Controls/ScrollViewer.cs
+++ b/src/Avalonia.Controls/ScrollViewer.cs
@@ -249,6 +249,22 @@ namespace Avalonia.Controls
             set { SetValue(VerticalScrollBarVisibilityProperty, value); }
         }
 
+        /// <summary>
+        /// Scrolls to the top-left corner of the content.
+        /// </summary>
+        public void ScrollToHome()
+        {
+            Offset = new Vector(double.NegativeInfinity, double.NegativeInfinity);
+        }
+
+        /// <summary>
+        /// Scrolls to the bottom-left corner of the content.
+        /// </summary>
+        public void ScrollToEnd()
+        {
+            Offset = new Vector(double.NegativeInfinity, double.PositiveInfinity);
+        }
+
         /// <summary>
         /// Gets a value indicating whether the viewer can scroll horizontally.
         /// </summary>
diff --git a/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs b/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs
index 2238175a4a..f281c83bb3 100644
--- a/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs
@@ -65,6 +65,30 @@ namespace Avalonia.Controls.UnitTests
             Assert.Equal(new Vector(10, 10), target.Offset);
         }
 
+        [Fact]
+        public void Test_ScrollToHome()
+        {
+            var target = new ScrollViewer();
+            target.SetValue(ScrollViewer.ExtentProperty, new Size(50, 50));
+            target.SetValue(ScrollViewer.ViewportProperty, new Size(10, 10));
+            target.Offset = new Vector(25, 25);
+            target.ScrollToHome();
+
+            Assert.Equal(new Vector(0, 0), target.Offset);
+        }
+
+        [Fact]
+        public void Test_ScrollToEnd()
+        {
+            var target = new ScrollViewer();
+            target.SetValue(ScrollViewer.ExtentProperty, new Size(50, 50));
+            target.SetValue(ScrollViewer.ViewportProperty, new Size(10, 10));
+            target.Offset = new Vector(25, 25);
+            target.ScrollToEnd();
+
+            Assert.Equal(new Vector(0, 40), target.Offset);
+        }
+
         private Control CreateTemplate(ScrollViewer control, INameScope scope)
         {
             return new Grid