| /* |
| * 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.impl.source.resolve.reference.impl; |
| |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.psi.*; |
| import com.intellij.util.IncorrectOperationException; |
| import com.intellij.util.containers.ContainerUtil; |
| import com.intellij.util.containers.HashSet; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.*; |
| |
| /** |
| * Created by IntelliJ IDEA. |
| * User: ik |
| * Date: 02.04.2003 |
| * Time: 12:22:03 |
| * To change this template use Options | File Templates. |
| */ |
| |
| public class PsiMultiReference implements PsiPolyVariantReference { |
| public static final Comparator<PsiReference> COMPARATOR = new Comparator<PsiReference>() { |
| @Override |
| public int compare(final PsiReference ref1, final PsiReference ref2) { |
| if (ref1.isSoft() && !ref2.isSoft()) return 1; |
| if (!ref1.isSoft() && ref2.isSoft()) return -1; |
| |
| boolean resolves1 = resolves(ref1); |
| boolean resolves2 = resolves(ref2); |
| 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; |
| } |
| }; |
| |
| private static boolean resolves(final PsiReference ref1) { |
| return ref1 instanceof PsiPolyVariantReference && ((PsiPolyVariantReference)ref1).multiResolve(false).length > 0 || ref1.resolve() != null; |
| } |
| |
| private final PsiReference[] myReferences; |
| private final PsiElement myElement; |
| private boolean mySorted; |
| |
| public PsiMultiReference(@NotNull PsiReference[] references, PsiElement element){ |
| assert references.length > 0; |
| myReferences = references; |
| myElement = element; |
| } |
| |
| public PsiReference[] getReferences() { |
| return myReferences; |
| } |
| |
| private synchronized PsiReference chooseReference(){ |
| if (!mySorted) { |
| Arrays.sort(myReferences, COMPARATOR); |
| mySorted = true; |
| } |
| return myReferences[0]; |
| } |
| |
| @Override |
| public PsiElement getElement(){ |
| return myElement; |
| } |
| |
| @Override |
| public TextRange getRangeInElement(){ |
| final PsiReference chosenRef = chooseReference(); |
| TextRange rangeInElement = chosenRef.getRangeInElement(); |
| PsiElement element = chosenRef.getElement(); |
| while(element != myElement) { |
| rangeInElement = rangeInElement.shiftRight(element.getStartOffsetInParent()); |
| element = element.getParent(); |
| if (element instanceof PsiFile) break; |
| } |
| return rangeInElement; |
| } |
| |
| @Override |
| public PsiElement resolve(){ |
| final PsiReference reference = chooseReference(); |
| if (cannotChoose()) { |
| final ResolveResult[] results = multiResolve(false); |
| return results.length == 1 ? results[0].getElement() : null; |
| } |
| return reference.resolve(); |
| } |
| |
| private boolean cannotChoose() { |
| return myReferences.length > 1 && COMPARATOR.compare(myReferences[0], myReferences[1]) == 0; |
| } |
| |
| @Override |
| @NotNull |
| public String getCanonicalText(){ |
| return chooseReference().getCanonicalText(); |
| } |
| |
| @Override |
| public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException{ |
| return chooseReference().handleElementRename(newElementName); |
| } |
| |
| @Override |
| public PsiElement bindToElement(@NotNull PsiElement element) throws IncorrectOperationException{ |
| return chooseReference().bindToElement(element); |
| } |
| |
| @Override |
| public boolean isReferenceTo(PsiElement element){ |
| for (PsiReference reference : myReferences) { |
| if (reference.isReferenceTo(element)) return true; |
| } |
| return false; |
| } |
| |
| @Override |
| @NotNull |
| public Object[] getVariants() { |
| Set<Object> variants = new HashSet<Object>(); |
| for(PsiReference ref: myReferences) { |
| Object[] refVariants = ref.getVariants(); |
| ContainerUtil.addAll(variants, refVariants); |
| } |
| return variants.toArray(); |
| } |
| |
| @Override |
| public boolean isSoft(){ |
| for (PsiReference reference : getReferences()) { |
| if (!reference.isSoft()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| @NotNull |
| public ResolveResult[] multiResolve(final boolean incompleteCode) { |
| final PsiReference[] refs = getReferences(); |
| Collection<ResolveResult> result = new LinkedHashSet<ResolveResult>(refs.length); |
| PsiElementResolveResult selfReference = null; |
| for (PsiReference reference : refs) { |
| if (reference instanceof PsiPolyVariantReference) { |
| ContainerUtil.addAll(result, ((PsiPolyVariantReference)reference).multiResolve(incompleteCode)); |
| } |
| else { |
| final PsiElement resolved = reference.resolve(); |
| if (resolved != null) { |
| final PsiElementResolveResult rresult = new PsiElementResolveResult(resolved); |
| if (getElement() == resolved) { |
| selfReference = rresult; |
| } else { |
| result.add(rresult); |
| } |
| } |
| } |
| } |
| |
| if (result.isEmpty() && selfReference != null) { |
| result.add(selfReference); // if i the only one starring at the sun |
| } |
| |
| return result.toArray(new ResolveResult[result.size()]); |
| } |
| |
| @Override |
| public String toString() { |
| return "PsiMultiReference{myReferences=" + Arrays.toString(myReferences) + '}'; |
| } |
| } |