| /* |
| * 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.findusages; |
| |
| import com.google.idea.blaze.base.lang.buildfile.psi.Argument.Keyword; |
| import com.google.idea.blaze.base.lang.buildfile.psi.ArgumentList; |
| import com.google.idea.blaze.base.lang.buildfile.psi.FuncallExpression; |
| import com.google.idea.blaze.base.lang.buildfile.psi.StringLiteral; |
| import com.intellij.codeInsight.TargetElementEvaluatorEx2; |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiReference; |
| import com.intellij.psi.impl.source.resolve.reference.impl.PsiMultiReference; |
| import java.util.Arrays; |
| import java.util.Comparator; |
| import java.util.Objects; |
| import javax.annotation.Nullable; |
| |
| /** |
| * StringLiterals can reference multiple targets (e.g. "//package:target" references both the |
| * package and the target). IntelliJ defaults to highlighting / navigating to the innermost |
| * reference, but in this case, we want the opposite behavior (the target reference should trump the |
| * package reference). |
| */ |
| public class BuildTargetElementEvaluator extends TargetElementEvaluatorEx2 { |
| |
| @Override |
| public boolean includeSelfInGotoImplementation(PsiElement element) { |
| return false; |
| } |
| |
| /** Returns null in the cases where we're happy with the default behavior. */ |
| @Nullable |
| @Override |
| public PsiElement getElementByReference(PsiReference ref, int flags) { |
| if (!(ref instanceof PsiMultiReference) || !(ref.getElement() instanceof StringLiteral)) { |
| return null; |
| } |
| // choose the outer-most reference |
| PsiReference[] refs = ((PsiMultiReference) ref).getReferences().clone(); |
| Arrays.sort(refs, COMPARATOR); |
| return refs[0].resolve(); |
| } |
| |
| private static final Comparator<PsiReference> COMPARATOR = |
| (ref1, ref2) -> { |
| boolean resolves1 = ref1.resolve() != null; |
| boolean resolves2 = ref2.resolve() != null; |
| if (resolves1 && !resolves2) { |
| return -1; |
| } |
| if (!resolves1 && resolves2) { |
| return 1; |
| } |
| |
| final TextRange range1 = ref1.getRangeInElement(); |
| final TextRange range2 = ref2.getRangeInElement(); |
| |
| if (TextRange.areSegmentsEqual(range1, range2)) { |
| return 0; |
| } |
| if (range1.getStartOffset() >= range2.getStartOffset() |
| && range1.getEndOffset() <= range2.getEndOffset()) { |
| return 1; |
| } |
| if (range2.getStartOffset() >= range1.getStartOffset() |
| && range2.getEndOffset() <= range1.getEndOffset()) { |
| return -1; |
| } |
| |
| return 0; |
| }; |
| |
| /** Redirect 'name' funcall argument values to the funcall expression (b/29088829). */ |
| @Nullable |
| @Override |
| public PsiElement getNamedElement(PsiElement element) { |
| return getParentFuncallIfNameString(element); |
| } |
| |
| @Nullable |
| private static FuncallExpression getParentFuncallIfNameString(PsiElement element) { |
| PsiElement parent = element.getParent(); |
| if (!(parent instanceof StringLiteral)) { |
| return null; |
| } |
| parent = parent.getParent(); |
| if (!(parent instanceof Keyword)) { |
| return null; |
| } |
| if (!Objects.equals(((Keyword) parent).getName(), "name")) { |
| return null; |
| } |
| parent = parent.getParent(); |
| if (!(parent instanceof ArgumentList)) { |
| return null; |
| } |
| parent = parent.getParent(); |
| return parent instanceof FuncallExpression ? (FuncallExpression) parent : null; |
| } |
| } |