From 06ddccb92ab5c8c774abdab96ac457ea8addab56 Mon Sep 17 00:00:00 2001
From: Aleksey Pivovarov <AMPivovarov@gmail.com>
Date: Thu, 3 Mar 2016 18:50:17 +0300
Subject: [PATCH] diff: do not fail on editors with negative size

this can actually happen for some layouts, ex: BorderLayout
---
 .../src/com/intellij/diff/util/DiffDividerDrawUtil.java          | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platform/diff-impl/src/com/intellij/diff/util/DiffDividerDrawUtil.java b/platform/diff-impl/src/com/intellij/diff/util/DiffDividerDrawUtil.java
index df381c067ab6..1ec8502f8b05 100644
--- a/platform/diff-impl/src/com/intellij/diff/util/DiffDividerDrawUtil.java
+++ b/platform/diff-impl/src/com/intellij/diff/util/DiffDividerDrawUtil.java
@@ -198,6 +198,7 @@ public class DiffDividerDrawUtil {
   @NotNull
   private static LineRange getVisibleInterval(Editor editor) {
     Rectangle area = editor.getScrollingModel().getVisibleArea();
+    if (area.height < 0) return new LineRange(0, 0);
     LogicalPosition position1 = editor.xyToLogicalPosition(new Point(0, area.y));
     LogicalPosition position2 = editor.xyToLogicalPosition(new Point(0, area.y + area.height));
     return new LineRange(position1.line, position2.line);