/*
* Copyright 2012-2014 Sergey Ignatov
*
* 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 org.intellij.erlang.psi.impl;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.ArrayUtil;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.ObjectUtils;
import org.intellij.erlang.psi.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.List;
import static org.intellij.erlang.psi.impl.ErlangPsiImplUtil.fromTheSameCaseExpression;
public class ErlangVariableReferenceImpl extends ErlangPsiPolyVariantCachingReferenceBase<ErlangQVar> {
public ErlangVariableReferenceImpl(@NotNull ErlangQVar element, TextRange range) {
super(element, range);
}
@NotNull
@Override
public ResolveResult[] multiResolve(boolean incompleteCode) {
ErlangVarProcessor processor = new ErlangVarProcessor(myElement.getText(), myElement);
ErlangLcExpression lc = PsiTreeUtil.getParentOfType(myElement, ErlangLcExpression.class);
ErlangCompositeElement place = ObjectUtils.chooseNotNull(lc, myElement);
ResolveUtil.treeWalkUp(place, processor);
List<ErlangQVar> result = processor.getAllResults();
if (!result.isEmpty()) return PsiElementResolveResult.createResults(result);
ErlangModule module = getErlangModule();
if (module == null) return ResolveResult.EMPTY_ARRAY;
module.processDeclarations(processor, ResolveState.initial(), module, module);
List<ErlangQVar> allResults = processor.getAllResults();
return PsiElementResolveResult.createResults(allResults);
}
@Nullable
@Override
public PsiElement resolveInner() {
ResolveResult[] resolveResults = multiResolve(false);
return resolveResults.length > 0 ? resolveResults[0].getElement() : null;
}
@Override
public boolean isReferenceTo(PsiElement element) {
if (!(element instanceof ErlangQVar)) return false;
for (ResolveResult result : multiResolve(false)) {
PsiElement resultElement = result.getElement();
if (resultElement instanceof ErlangQVar && resultElement.isEquivalentTo(element)) return true;
}
if (fromTheSameCaseExpression(getElement(), element)) return true;
return false;
}
@Nullable
private ErlangModule getErlangModule() {
PsiFile file = myElement.getContainingFile();
ErlangFile erlangFile = file instanceof ErlangFile ? (ErlangFile) file : null;
return erlangFile != null ? erlangFile.getModule() : null;
}
@NotNull
@Override
public Object[] getVariants() {
return ArrayUtil.EMPTY_OBJECT_ARRAY;
}
@Override
public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException {
myElement.replace(ErlangElementFactory.createQVarFromText(myElement.getProject(), newElementName));
return myElement;
}
}