From c3718ce5dd93117ccdf364ce9d53c068726f3c72 Mon Sep 17 00:00:00 2001
From: Alex Dima <alexdima@microsoft.com>
Date: Wed, 31 Aug 2016 17:01:57 +0200
Subject: [PATCH] Fixes Microsoft/monaco-editor#137: Add fallback case when hit
 testing completely fails

---
 src/vs/editor/browser/controller/mouseTarget.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/vs/editor/browser/controller/mouseTarget.ts b/src/vs/editor/browser/controller/mouseTarget.ts
index 4059b8e9a9c..6a0cc8f5be3 100644
--- a/src/vs/editor/browser/controller/mouseTarget.ts
+++ b/src/vs/editor/browser/controller/mouseTarget.ts
@@ -294,6 +294,11 @@ export class MouseTargetFactory {
 				if (lineNumberAttribute && columnAttribute) {
 					return this.createMouseTargetFromViewCursor(t, parseInt(lineNumberAttribute, 10), parseInt(columnAttribute, 10), mouseColumn);
 				}
+			} else {
+				// Hit testing completely failed...
+				let possibleLineNumber = this._viewHelper.getLineNumberAtVerticalOffset(mouseVerticalOffset);
+				let maxColumn = this._context.model.getLineMaxColumn(possibleLineNumber);
+				return new MouseTarget(t, MouseTargetType.CONTENT_EMPTY, mouseColumn, new Position(possibleLineNumber, maxColumn));
 			}
 		}