[Peek] Update FilePreviewer to prevent tooltips from obscuring title bar controls

src/modules/peek/Peek.FilePreviewer/FilePreview.xaml

@@ -30,17 +30,24 @@
             MaxWidth="{x:Bind ImagePreviewer.MaxImageSize.Width, Mode=OneWay}"
             MaxHeight="{x:Bind ImagePreviewer.MaxImageSize.Height, Mode=OneWay}"
             Source="{x:Bind ImagePreviewer.Preview, Mode=OneWay}"
-            ToolTipService.ToolTip="{x:Bind InfoTooltip, Mode=OneWay}"
-            Visibility="{x:Bind IsPreviewVisible(ImagePreviewer, Previewer.State), Mode=OneWay}" />
+            Visibility="{x:Bind IsPreviewVisible(ImagePreviewer, Previewer.State), Mode=OneWay}"
+            PointerMoved="ToolTipParentControl_PointerMoved">
+            <ToolTipService.ToolTip>
+                <ToolTip Content="{x:Bind InfoTooltip, Mode=OneWay}" />
+            </ToolTipService.ToolTip>
+        </Image>
 
         <MediaPlayerElement
             x:Name="VideoPreview"
             AreTransportControlsEnabled="True"
             AutoPlay="True"
             FlowDirection="LeftToRight"
             Source="{x:Bind VideoPreviewer.Preview, Mode=OneWay}"
-            ToolTipService.ToolTip="{x:Bind InfoTooltip, Mode=OneWay}"
-            Visibility="{x:Bind IsPreviewVisible(VideoPreviewer, Previewer.State), Mode=OneWay}">
+            Visibility="{x:Bind IsPreviewVisible(VideoPreviewer, Previewer.State), Mode=OneWay}"
+            PointerMoved="ToolTipParentControl_PointerMoved">
+            <ToolTipService.ToolTip>
+                <ToolTip Content="{x:Bind InfoTooltip, Mode=OneWay}" />
+            </ToolTipService.ToolTip>
             <MediaPlayerElement.KeyboardAccelerators>
                 <KeyboardAccelerator Key="Space" Invoked="KeyboardAccelerator_Space_Invoked" />
             </MediaPlayerElement.KeyboardAccelerators>

src/modules/peek/Peek.FilePreviewer/FilePreview.xaml.cs

@@ -12,6 +12,7 @@
 using Microsoft.PowerToys.Telemetry;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Controls.Primitives;
 using Microsoft.UI.Xaml.Input;
 using Microsoft.Web.WebView2.Core;
 using Peek.Common.Extensions;
@@ -336,10 +337,8 @@ private async Task UpdateTooltipAsync(CancellationToken cancellationToken)
             }
 
             // Fetch and format available file properties
-            var sb = new StringBuilder();
-
             string fileNameFormatted = ReadableStringHelper.FormatResourceString("PreviewTooltip_FileName", Item.Name);
-            sb.Append(fileNameFormatted);
+            var sb = new StringBuilder(fileNameFormatted, 256);
 
             cancellationToken.ThrowIfCancellationRequested();
             string fileType = await Task.Run(Item.GetContentTypeAsync);
@@ -356,5 +355,23 @@ private async Task UpdateTooltipAsync(CancellationToken cancellationToken)
 
             InfoTooltip = sb.ToString();
         }
+
+        /// <summary>
+        /// Set the placement of the tooltip for those previewers supporting the feature, ensuring it does not obscure the Main Window's title bar.
+        /// </summary>
+        private void ToolTipParentControl_PointerMoved(object sender, PointerRoutedEventArgs e)
+        {
+            var previewControl = sender as FrameworkElement;
+            if (previewControl != null)
+            {
+                var toolTip = ToolTipService.GetToolTip(previewControl) as ToolTip;
+                if (toolTip != null)
+                {
+                    var pos = e.GetCurrentPoint(previewControl).Position;
+                    toolTip.Placement = pos.Y < previewControl.ActualHeight / 2 ?
+                        PlacementMode.Bottom : PlacementMode.Top;
+                }
+            }
+        }
     }
 }