From b61c37691497c3fb6c554122475138c302ba44ad Mon Sep 17 00:00:00 2001
From: mae <qt-info@nokia.com>
Date: Wed, 14 Jul 2010 18:48:36 +0200
Subject: [PATCH] Fix findScope performance issue

Fixes the performance of large find scope selections. Try
Ctrl+A Ctrl+F in a large file and scroll.
---
 src/plugins/texteditor/texteditoroverlay.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/plugins/texteditor/texteditoroverlay.cpp b/src/plugins/texteditor/texteditoroverlay.cpp
index 331e449955e..20d38fae38a 100644
--- a/src/plugins/texteditor/texteditoroverlay.cpp
+++ b/src/plugins/texteditor/texteditoroverlay.cpp
@@ -138,6 +138,9 @@ QPainterPath TextEditorOverlay::createSelectionPath(const QTextCursor &begin, co
 
     QTextBlock block = begin.block();
 
+    if (block.blockNumber() < m_editor->firstVisibleBlock().blockNumber() - 4)
+        block = m_editor->document()->findBlockByNumber(m_editor->firstVisibleBlock().blockNumber() - 4);
+
     bool inSelection = false;
 
     QVector<QRectF> selection;