From 983f99eb0d4898d3c4aa06880b965be1973ba68e Mon Sep 17 00:00:00 2001
From: Dmitry Trofimov <dmitry.trofimov@jetbrains.com>
Date: Tue, 5 Apr 2011 10:53:07 +0400
Subject: [PATCH] Fixed bug with empty string adding (PY-3232).

---
 .../execution/process/ConsoleHistoryModel.java     | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/platform/platform-impl/src/com/intellij/execution/process/ConsoleHistoryModel.java b/platform/platform-impl/src/com/intellij/execution/process/ConsoleHistoryModel.java
index 0e562906b9d4..385b0bb2d862 100644
--- a/platform/platform-impl/src/com/intellij/execution/process/ConsoleHistoryModel.java
+++ b/platform/platform-impl/src/com/intellij/execution/process/ConsoleHistoryModel.java
@@ -2,6 +2,7 @@ package com.intellij.execution.process;
 
 import com.intellij.ide.ui.UISettings;
 import com.intellij.openapi.util.ModificationTracker;
+import com.intellij.openapi.util.text.StringUtil;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
@@ -21,11 +22,14 @@ public class ConsoleHistoryModel implements ModificationTracker {
   public void addToHistory(final String statement) {
     final int maxHistorySize = getMaxHistorySize();
     synchronized (myHistory) {
-      removeFromHistory(statement);
-      if (myHistory.size() >= maxHistorySize) {
-        myHistory.removeLast();
+      myHistoryCursor = -1;
+      if (!StringUtil.isEmptyOrSpaces(statement)) {
+        removeFromHistory(statement);
+        if (myHistory.size() >= maxHistorySize) {
+          myHistory.removeLast();
+        }
+        myHistory.addFirst(statement);
       }
-      myHistory.addFirst(statement);
     }
   }
 
@@ -36,7 +40,7 @@ public class ConsoleHistoryModel implements ModificationTracker {
   public void removeFromHistory(final String statement) {
     synchronized (myHistory) {
       myModificationTracker++;
-      myHistoryCursor = -1;
+
       myHistory.remove(statement);
     }
   }