From c4cb54dca433c3e7451d8c31ae7253957350dff6 Mon Sep 17 00:00:00 2001
From: Anna Kozlova <anna.kozlova@jetbrains.com>
Date: Mon, 25 Jan 2016 20:08:10 +0300
Subject: [PATCH] EA-78372 - ROME: DocumentImpl.replaceString

---
 .../changeSignature/JavaChangeSignatureHandler.java           | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/java/java-impl/src/com/intellij/refactoring/changeSignature/JavaChangeSignatureHandler.java b/java/java-impl/src/com/intellij/refactoring/changeSignature/JavaChangeSignatureHandler.java
index 687f7a2a3576..4d798ed1b9b2 100644
--- a/java/java-impl/src/com/intellij/refactoring/changeSignature/JavaChangeSignatureHandler.java
+++ b/java/java-impl/src/com/intellij/refactoring/changeSignature/JavaChangeSignatureHandler.java
@@ -48,7 +48,9 @@ public class JavaChangeSignatureHandler implements ChangeSignatureHandler {
     if (element instanceof PsiMethod) {
       final ChangeSignatureGestureDetector detector = ChangeSignatureGestureDetector.getInstance(project);
       final PsiIdentifier nameIdentifier = ((PsiMethod)element).getNameIdentifier();
-      if (nameIdentifier != null && detector.isChangeSignatureAvailable(element)) {
+      if (nameIdentifier != null && 
+          editor.getDocument().isWritable() && 
+          detector.isChangeSignatureAvailable(element)) {
         detector.changeSignature(element.getContainingFile(), false);
         return;
       }