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/*
* Copyright 2000-2014 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.xml;
import com.intellij.openapi.util.NullableLazyValue;
import com.intellij.openapi.util.TextRange;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiReference;
import com.intellij.psi.meta.PsiMetaOwner;
import com.intellij.psi.xml.XmlAttribute;
import com.intellij.psi.xml.XmlTag;
import com.intellij.util.ArrayUtil;
import com.intellij.util.IncorrectOperationException;
import com.intellij.xml.XmlAttributeDescriptor;
import com.intellij.xml.XmlElementDescriptor;
import com.intellij.xml.impl.XmlAttributeDescriptorEx;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class XmlAttributeReference implements PsiReference {
private final NullableLazyValue<XmlAttributeDescriptor> myDescriptor = new NullableLazyValue<XmlAttributeDescriptor>() {
@Override
protected XmlAttributeDescriptor compute() {
XmlTag parent = myAttribute.getParent();
final XmlElementDescriptor descr = parent.getDescriptor();
if (descr != null) {
return descr.getAttributeDescriptor(myAttribute);
}
return null;
}
};
private final XmlAttributeImpl myAttribute;
public XmlAttributeReference(XmlAttributeImpl attribute) {
myAttribute = attribute;
}
@Override
public XmlAttribute getElement() {
return myAttribute;
}
@Override
public TextRange getRangeInElement() {
final int parentOffset = myAttribute.getNameElement().getStartOffsetInParent();
int nsLen = myAttribute.getNamespacePrefix().length();
nsLen += nsLen > 0 && !myAttribute.getRealLocalName().isEmpty() ? 1 : -nsLen;
return new TextRange(parentOffset + nsLen, parentOffset + myAttribute.getNameElement().getTextLength());
}
@Override
public PsiElement resolve() {
final XmlAttributeDescriptor descriptor = getDescriptor();
return descriptor != null ? descriptor.getDeclaration() : null;
}
@Override
@NotNull
public String getCanonicalText() {
return myAttribute.getName();
}
@Override
public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException {
String newName = newElementName;
if (getDescriptor() instanceof XmlAttributeDescriptorEx) {
final XmlAttributeDescriptorEx xmlAttributeDescriptorEx = (XmlAttributeDescriptorEx)getDescriptor();
final String s = xmlAttributeDescriptorEx.handleTargetRename(newElementName);
if (s != null) {
final String prefix = myAttribute.getNamespacePrefix();
newName = StringUtil.isEmpty(prefix) ? s : prefix + ":" + s;
}
}
return myAttribute.setName(newName);
}
@Override
public PsiElement bindToElement(@NotNull PsiElement element) throws IncorrectOperationException {
if (element instanceof PsiMetaOwner) {
final PsiMetaOwner owner = (PsiMetaOwner)element;
if (owner.getMetaData() instanceof XmlElementDescriptor) {
myAttribute.setName(owner.getMetaData().getName());
}
}
throw new IncorrectOperationException("Cant bind to not a xml element definition!");
}
@Override
public boolean isReferenceTo(PsiElement element) {
return myAttribute.getManager().areElementsEquivalent(element, resolve());
}
@Override
@NotNull
public Object[] getVariants() {
return ArrayUtil.EMPTY_OBJECT_ARRAY; // moved to XmlAttributeReferenceCompletionProvider
}
@Override
public boolean isSoft() {
return getDescriptor() == null;
}
@Nullable
private XmlAttributeDescriptor getDescriptor() {
return myDescriptor.getValue();
}
}
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