Fixes #45742: Always reveal large boxes at the top

src/vs/editor/browser/viewParts/lines/viewLines.ts

@@ -589,7 +589,10 @@ export class ViewLines extends ViewPart implements IVisibleLinesHost<ViewLine>,
 
 		let newScrollTop: number;
 
-		if (verticalType === viewEvents.VerticalRevealType.Center || verticalType === viewEvents.VerticalRevealType.CenterIfOutsideViewport) {
+		if (boxEndY - boxStartY > viewportHeight) {
+			// the box is larger than the viewport ... scroll to its top
+			newScrollTop = boxStartY;
+		} else if (verticalType === viewEvents.VerticalRevealType.Center || verticalType === viewEvents.VerticalRevealType.CenterIfOutsideViewport) {
 			if (verticalType === viewEvents.VerticalRevealType.CenterIfOutsideViewport && viewportStartY <= boxStartY && boxEndY <= viewportEndY) {
 				// Box is already in the viewport... do nothing
 				newScrollTop = viewportStartY;