From a9667168c1d131d02ad19d1f443d5efa4fdf98cc Mon Sep 17 00:00:00 2001
From: gdkhd812 <test@yahoo.co.jp>
Date: Thu, 12 Oct 2017 18:51:52 +0900
Subject: [PATCH] =?utf8?q?=E9=81=B8=E6=8A=9E=E6=99=82=E3=81=AE=E3=83=AC?=
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MIME-Version: 1.0
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---
 Core/Document.cs    |  9 ++++-----
 Core/LineToIndex.cs | 11 +++++++++++
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/Core/Document.cs b/Core/Document.cs
index 449e7ee..0a42405 100644
--- a/Core/Document.cs
+++ b/Core/Document.cs
@@ -792,27 +792,26 @@ namespace FooEditEngine
             if (start < 0 || start + length < 0 || start + length > this.Length)
                 throw new ArgumentOutOfRangeException("startかendが指定できる範囲を超えてます");
             //選択範囲が消されたとき
-            if(this.Selections.Count > 0 && length == 0)
-                this.LayoutLines.ClearLayoutCache();
+            foreach (Selection sel in this.Selections)
+                this.LayoutLines.ClearLayoutCache(sel.start, sel.length);
             this.Selections.Clear();
             if (length < 0)
             {
                 int oldStart = start;
                 start += length;
                 length = oldStart - start;
-                this.LayoutLines.ClearLayoutCache();
             }
             if (this.RectSelection && length != 0)
             {
                 TextPoint startTextPoint = this.LayoutLines.GetTextPointFromIndex(start);
                 TextPoint endTextPoint = this.LayoutLines.GetTextPointFromIndex(start + length);
                 this.SelectByRectangle(new TextRectangle(startTextPoint, endTextPoint));
-                this.LayoutLines.ClearLayoutCache();
+                this.LayoutLines.ClearLayoutCache(start, length);
             }
             else if (length != 0)
             {
                 this.Selections.Add(Selection.Create(start, length));
-                this.LayoutLines.ClearLayoutCache();
+                this.LayoutLines.ClearLayoutCache(start, length);
             }
             this.SelectionChanged(this, null);
         }
diff --git a/Core/LineToIndex.cs b/Core/LineToIndex.cs
index e64d8be..f82be4e 100644
--- a/Core/LineToIndex.cs
+++ b/Core/LineToIndex.cs
@@ -330,6 +330,17 @@ namespace FooEditEngine
         }
 
         /// <summary>
+        /// 保持しているレイアウトキャッシュをクリアーする
+        /// </summary>
+        public void ClearLayoutCache(int index,int length)
+        {
+            int startRow = this.GetLineNumberFromIndex(index);
+            int endRow = this.GetLineNumberFromIndex(index + length - 1);
+            for (int i = startRow; i <= endRow; i++)
+                this.Lines[i].Dispose();
+        }
+
+        /// <summary>
         /// 行番号に対応する文字列を返します
         /// </summary>
         /// <param name="n"></param>
-- 
2.11.0