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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.filters.getters;
import com.intellij.codeInsight.completion.CompletionContext;
import com.intellij.psi.PsiElement;
import com.intellij.psi.filters.ContextGetter;
import com.intellij.psi.impl.source.xml.XmlTokenImpl;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.xml.XmlAttribute;
import com.intellij.psi.xml.XmlTokenType;
import com.intellij.util.ArrayUtil;
import com.intellij.xml.XmlAttributeDescriptor;
import com.intellij.xml.impl.BasicXmlAttributeDescriptor;
import org.jetbrains.annotations.Nullable;
/**
* Created by IntelliJ IDEA.
* User: ik
* Date: 24.11.2003
* Time: 14:17:59
* To change this template use Options | File Templates.
*/
public class XmlAttributeValueGetter implements ContextGetter {
public XmlAttributeValueGetter() {}
public Object[] get(PsiElement context, CompletionContext completionContext) {
return getApplicableAttributeVariants(context);
}
@Nullable
public static String[] getEnumeratedValues(XmlAttribute attribute) {
final XmlAttributeDescriptor descriptor = attribute.getDescriptor();
if (descriptor == null) {
return ArrayUtil.EMPTY_STRING_ARRAY;
}
return descriptor instanceof BasicXmlAttributeDescriptor ?
((BasicXmlAttributeDescriptor)descriptor).getEnumeratedValues(attribute) : descriptor.getEnumeratedValues();
}
private Object[] getApplicableAttributeVariants(PsiElement _context) {
if (_context instanceof XmlTokenImpl && ((XmlTokenImpl)_context).getTokenType() == XmlTokenType.XML_ATTRIBUTE_VALUE_TOKEN) {
XmlAttribute attr = PsiTreeUtil.getParentOfType(_context, XmlAttribute.class);
if (attr != null) {
final XmlAttributeDescriptor descriptor = attr.getDescriptor();
if (descriptor != null) {
if (descriptor.isFixed()) {
final String defaultValue = descriptor.getDefaultValue();
return defaultValue == null ? ArrayUtil.EMPTY_OBJECT_ARRAY : new Object[]{defaultValue};
}
String[] values = getEnumeratedValues(attr);
final String[] strings = addSpecificCompletions(attr);
if (values == null || values.length == 0) {
values = strings;
}
else if (strings != null) {
values = ArrayUtil.mergeArrays(values, strings);
}
return values == null ? ArrayUtil.EMPTY_OBJECT_ARRAY : values;
}
}
}
return ArrayUtil.EMPTY_OBJECT_ARRAY;
}
@Nullable
protected String[] addSpecificCompletions(final XmlAttribute context) {
return null;
}
}
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