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/*
* 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.smartPointers;
import com.intellij.psi.*;
import com.intellij.psi.impl.source.PsiFileWithStubSupport;
import com.intellij.psi.stubs.IStubElementType;
import com.intellij.psi.stubs.StubTree;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.psi.xml.XmlTag;
import com.intellij.xml.util.XmlTagUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class AnchorElementInfoFactory implements SmartPointerElementInfoFactory {
@Override
@Nullable
public SmartPointerElementInfo createElementInfo(@NotNull PsiElement element) {
PsiFile containingFile = element.getContainingFile();
if (element instanceof StubBasedPsiElement && containingFile instanceof PsiFileWithStubSupport) {
PsiFileWithStubSupport stubFile = (PsiFileWithStubSupport)containingFile;
StubTree stubTree = stubFile.getStubTree();
if (stubTree != null) {
// use stubs when tree is not loaded
StubBasedPsiElement stubPsi = (StubBasedPsiElement)element;
int stubId = PsiAnchor.calcStubIndex(stubPsi);
IStubElementType myStubElementType = stubPsi.getElementType();
if (stubId != -1) {
return new AnchorElementInfo(element, stubFile, stubId, myStubElementType);
}
}
}
PsiElement anchor = getAnchor(element);
if (anchor != null) {
return new AnchorElementInfo(anchor, containingFile);
}
return null;
}
@Nullable
static PsiElement getAnchor(PsiElement element) {
PsiUtilCore.ensureValid(element);
PsiElement anchor = null;
if (element instanceof PsiClass) {
if (element instanceof PsiAnonymousClass) {
anchor = ((PsiAnonymousClass)element).getBaseClassReference().getReferenceNameElement();
}
else {
anchor = ((PsiClass)element).getNameIdentifier();
}
}
else if (element instanceof PsiMethod) {
anchor = ((PsiMethod)element).getNameIdentifier();
}
else if (element instanceof PsiVariable) {
anchor = ((PsiVariable)element).getNameIdentifier();
}
else if (element instanceof XmlTag) {
anchor = XmlTagUtil.getStartTagNameElement((XmlTag)element);
}
if (anchor != null && (!anchor.isPhysical() /*|| anchor.getTextRange()==null*/)) return null;
return anchor;
}
}
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