| /* |
| * Copyright 2016 The Bazel Authors. All rights reserved. |
| * |
| * 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.google.idea.blaze.base.lang.buildfile.psi; |
| |
| import com.google.idea.blaze.base.lang.buildfile.lexer.BuildToken; |
| import com.google.idea.blaze.base.lang.buildfile.references.LocalReference; |
| import com.intellij.lang.ASTNode; |
| import com.intellij.psi.PsiReference; |
| import com.intellij.psi.tree.IElementType; |
| import javax.annotation.Nullable; |
| |
| /** References a PsiNamedElement */ |
| public class ReferenceExpression extends BuildElementImpl implements Expression { |
| |
| public ReferenceExpression(ASTNode astNode) { |
| super(astNode); |
| } |
| |
| @Override |
| protected void acceptVisitor(BuildElementVisitor visitor) { |
| visitor.visitReferenceExpression(this); |
| } |
| |
| @Nullable |
| public ASTNode getNameElement() { |
| return getNode().findChildByType(BuildToken.IDENTIFIER); |
| } |
| |
| @Nullable |
| public String getReferencedName() { |
| ASTNode node = getNameElement(); |
| return node != null ? node.getText() : null; |
| } |
| |
| @Override |
| public PsiReference getReference() { |
| IElementType parentType = getParentType(); |
| // function names are resolved by the parent funcall node |
| if (BuildElementTypes.FUNCALL_EXPRESSION.equals(parentType) && !beforeDot(getNode())) { |
| return null; |
| } |
| if (BuildElementTypes.GLOB_EXPRESSION.equals(parentType)) { |
| return null; |
| } |
| if (BuildElementTypes.DOT_EXPRESSION.equals(parentType) && !beforeDot(getNode())) { |
| return null; |
| } |
| return new LocalReference(this); |
| } |
| |
| @Override |
| public String getName() { |
| return getReferencedName(); |
| } |
| |
| private static boolean beforeDot(ASTNode node) { |
| ASTNode prev = node.getTreeNext(); |
| return prev != null && prev.getText().equals("."); |
| } |
| } |