/*
 * Copyright 2000-2014 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.jetbrains.python.psi.impl;

import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.jetbrains.python.psi.PyExceptPart;
import com.jetbrains.python.psi.PyExpression;
import org.jetbrains.annotations.Nullable;

public final class PyExceptPartNavigator {
  private PyExceptPartNavigator() {
  }

  public static @Nullable PyExceptPart getPyExceptPartByTarget(final PsiElement element) {
    final PyExceptPart pyExceptPart = PsiTreeUtil.getParentOfType(element, PyExceptPart.class, false);
    if (pyExceptPart == null) {
      return null;
    }
    final PyExpression expr = pyExceptPart.getTarget();
    if (expr != null && PsiTreeUtil.isAncestor(expr, element, false)) {
      return pyExceptPart;
    }
    return null;
  }
}
