/*
 * Copyright 2000-2009 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.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intellij.refactoring.actions;

import com.intellij.lang.Language;
import com.intellij.openapi.actionSystem.ActionPlaces;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.refactoring.RefactoringActionHandler;
import com.intellij.refactoring.safeDelete.SafeDeleteHandler;
import com.intellij.refactoring.safeDelete.SafeDeleteProcessor;
import org.jetbrains.annotations.NotNull;

public class SafeDeleteAction extends BaseRefactoringAction {
  public SafeDeleteAction() {
    setInjectedContext(true);
  }

  @Override
  public boolean isAvailableInEditorOnly() {
    return false;
  }

  @Override
  protected boolean isAvailableForLanguage(Language language) {
    return true;
  }

  @Override
  public boolean isEnabledOnElements(PsiElement @NotNull [] elements) {
    for (PsiElement element : elements) {
      if (!SafeDeleteProcessor.validElement(element)) return false;
    }
    return true;
  }

  @Override
  protected boolean isAvailableOnElementInEditorAndFile(@NotNull final PsiElement element, @NotNull final Editor editor, @NotNull PsiFile file, @NotNull DataContext context) {
    return SafeDeleteProcessor.validElement(element);
  }

  @Override
  protected boolean isAvailableOnElementInEditorAndFile(@NotNull PsiElement element,
                                                        @NotNull Editor editor,
                                                        @NotNull PsiFile file,
                                                        @NotNull DataContext context,
                                                        @NotNull String place) {
    PsiElement targetElement = element;
    if (place.equals(ActionPlaces.REFACTORING_QUICKLIST)) {
      PsiElement caretElement = BaseRefactoringAction.getElementAtCaret(editor, file);
      if (! PsiTreeUtil.isAncestor(element, caretElement, false)) {
        targetElement = caretElement;
      }
    }
    return isAvailableOnElementInEditorAndFile(targetElement, editor, file, context);
  }

  @Override
  public RefactoringActionHandler getHandler(@NotNull DataContext dataContext) {
    return new SafeDeleteHandler();
  }

}

@@ -2356,24 +2356,63 @@
 ng place) %7B%0A
+    if (!file.isValid()) return false;%0A
     PsiEleme

disable on invalid files