| /* |
| * 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.psi.filters; |
| |
| import com.intellij.lang.ASTNode; |
| import com.intellij.psi.PsiComment; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.TokenType; |
| import com.intellij.psi.impl.source.tree.TreeUtil; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author Dmitry Avdeev |
| */ |
| public class FilterPositionUtil { |
| |
| @Nullable |
| public static PsiElement searchNonSpaceNonCommentBack(PsiElement element) { |
| return searchNonSpaceNonCommentBack(element, false); |
| } |
| |
| @Nullable |
| public static PsiElement searchNonSpaceNonCommentBack(PsiElement element, final boolean strict) { |
| if(element == null || element.getNode() == null) return null; |
| ASTNode leftNeibour = TreeUtil.prevLeaf(element.getNode()); |
| if (!strict) { |
| while (leftNeibour != null && (leftNeibour.getElementType() == TokenType.WHITE_SPACE || leftNeibour.getPsi() instanceof PsiComment)){ |
| leftNeibour = TreeUtil.prevLeaf(leftNeibour); |
| } |
| } |
| return leftNeibour != null ? leftNeibour.getPsi() : null; |
| |
| } |
| } |