From e30aa59a897ca3849fb99c6393cfb426ed22d33b Mon Sep 17 00:00:00 2001
From: Lars Knoll <lars.knoll@qt.io>
Date: Fri, 14 Feb 2020 13:13:24 +0100
Subject: Fix a quadratic behavior in the BiDi algorithm

Reset the lastETPosition after we changed DirET to DirEN,
to avoid iterating over the same set of characters many times.

Change-Id: Ib4113d0ba87ad70fc6bb386632eb094f943c080d
Reviewed-by: Robert Loehning <robert.loehning@qt.io>
---
 src/gui/text/qtextengine.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'src/gui')

diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index 209433dac5..cd056a743a 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -712,9 +712,8 @@ struct QBidiAlgorithm {
                         analysis[pos].bidiDirection = QChar::DirEN;
                         ++it;
                     }
-                } else {
-                    lastETPosition.clear();
                 }
+                lastETPosition.clear();
             }
             last = current;
             lastPos = pos;
-- 
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