fix: replace null suppression with null checks in DragWidth

Illustar0 · Arlodotexe · commit ed04d391f74f · 2026-02-10T14:11:55.000-06:00
Replaced the unsafe null-forgiving operator (!) with explicit null checks to prevent potential runtime exceptions when container or thumb is null.

Signed-off-by: Illustar0 &lt;me@illustar0.com&gt;
diff --git a/components/RangeSelector/src/RangeSelector.Input.Drag.cs b/components/RangeSelector/src/RangeSelector.Input.Drag.cs
@@ -77,8 +77,12 @@ private void Thumb_DragCompleted(object sender, DragCompletedEventArgs e)
 
     private double DragWidth()
     {
-        return new UVCoord(_containerCanvas!.ActualWidth, _containerCanvas.ActualHeight, Orientation).U
-             - new UVCoord(_maxThumb!.Width, _maxThumb.Height, Orientation).U;
+        if (_containerCanvas == null || _maxThumb == null)
+        {
+            return 0;
+        }
+        return new UVCoord(_containerCanvas.ActualWidth, _containerCanvas.ActualHeight, Orientation).U
+             - new UVCoord(_maxThumb.Width, _maxThumb.Height, Orientation).U;
     }
 
     private double DragThumb(Thumb? thumb, double min, double max, double nextPos)

Original file line number	Diff line number	Diff line change
`@@ -77,8 +77,12 @@ private void Thumb_DragCompleted(object sender, DragCompletedEventArgs e)`
`77`	`77`
`78`	`78`	`private double DragWidth()`
`79`	`79`	`{`
`80`		`- return new UVCoord(_containerCanvas!.ActualWidth, _containerCanvas.ActualHeight, Orientation).U`
`81`		`- - new UVCoord(_maxThumb!.Width, _maxThumb.Height, Orientation).U;`
	`80`	`+ if (_containerCanvas == null \|\| _maxThumb == null)`
	`81`	`+ {`
	`82`	`+ return 0;`
	`83`	`+ }`
	`84`	`+ return new UVCoord(_containerCanvas.ActualWidth, _containerCanvas.ActualHeight, Orientation).U`
	`85`	`+ - new UVCoord(_maxThumb.Width, _maxThumb.Height, Orientation).U;`
`82`	`86`	`}`
`83`	`87`
`84`	`88`	`private double DragThumb(Thumb? thumb, double min, double max, double nextPos)`