selection quit when we jump to update outside of viewport

src/Surface.zig

@@ -3417,6 +3417,12 @@ pub fn cursorPosCallback(
             return;
         };
 
+        // handle the case where we go outside of the viewport
+        // which is represented by a negative position for both x and y
+        if (pos.x < 0 and pos.y < 0) {
+            return;
+        }
+
         // Handle dragging depending on click count
         switch (self.mouse.left_click_count) {
             1 => try self.dragLeftClickSingle(pin, pos.x),
@@ -3548,7 +3554,6 @@ fn dragLeftClickSingle(
     //     ALWAYS selected the current char, but we must move the cursor
     //     left of the xboundary.
     //   - Inverted logic for forwards selections.
-    //
 
     // Our clicking point
     const click_pin = self.mouse.left_click_pin.?.*;