From 411af3e4e9c4b192cf3e336d3cbcd7e66f38aff0 Mon Sep 17 00:00:00 2001
From: "Denis.Zhdanov" <Denis.Zhdanov@jetbrains.com>
Date: Thu, 3 May 2012 13:18:36 +0400
Subject: [PATCH] IDEA-85591 Avoid exception on opening code style settings
 from the welcome screen

Temporary workaround for the disabled PSI -> document synchronisation for default project
---
 .../src/com/intellij/formatting/FormatProcessor.java | 12 ++++++++++++
 .../psi/formatter/PsiBasedFormattingModel.java       |  7 ++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/formatting/FormatProcessor.java b/platform/lang-impl/src/com/intellij/formatting/FormatProcessor.java
index ae8a514bd9ee..e3ba65302ee2 100644
--- a/platform/lang-impl/src/com/intellij/formatting/FormatProcessor.java
+++ b/platform/lang-impl/src/com/intellij/formatting/FormatProcessor.java
@@ -16,6 +16,7 @@
 
 package com.intellij.formatting;
 
+import com.intellij.lang.ASTNode;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.editor.TextChange;
@@ -27,6 +28,7 @@ import com.intellij.openapi.util.TextRange;
 import com.intellij.psi.codeStyle.CodeStyleSettings;
 import com.intellij.psi.codeStyle.CommonCodeStyleSettings;
 import com.intellij.psi.formatter.DocumentBasedFormattingModel;
+import com.intellij.psi.formatter.PsiBasedFormattingModel;
 import com.intellij.util.ui.UIUtil;
 import gnu.trove.TIntObjectHashMap;
 import org.jetbrains.annotations.NotNull;
@@ -1408,6 +1410,16 @@ class FormatProcessor {
       
       if (done) {
         myModel.commitChanges();
+        
+        // TODO [cdr] remove when IDEA-85591 is done
+        if (myModel instanceof PsiBasedFormattingModel) {
+          PsiBasedFormattingModel psiModel = ((PsiBasedFormattingModel)myModel);
+          final ASTNode rootNode = psiModel.getRootNode();
+          final Document document = psiModel.getDocumentModel().getDocument();
+          if (rootNode != null && !document.getText().equals(rootNode.getText())) {
+            document.setText(rootNode.getText());
+          }
+        }
       }
     }
 
diff --git a/platform/lang-impl/src/com/intellij/psi/formatter/PsiBasedFormattingModel.java b/platform/lang-impl/src/com/intellij/psi/formatter/PsiBasedFormattingModel.java
index db3220decc5e..a7a551a78b62 100644
--- a/platform/lang-impl/src/com/intellij/psi/formatter/PsiBasedFormattingModel.java
+++ b/platform/lang-impl/src/com/intellij/psi/formatter/PsiBasedFormattingModel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2009 JetBrains s.r.o.
+ * Copyright 2000-2012 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -134,6 +134,11 @@ public class PsiBasedFormattingModel implements FormattingModel {
   public Block getRootBlock() {
     return myRootBlock;
   }
+  
+  @Nullable
+  public ASTNode getRootNode() {
+    return myASTNode;
+  }
 
   public void canModifyAllWhiteSpaces() {
     myCanModifyAllWhiteSpaces = true;