XmlNonFirstCompletionContributor.java

/*
 * Copyright 2000-2013 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.codeInsight.completion;

import com.intellij.codeInsight.lookup.LookupElementBuilder;
import com.intellij.patterns.XmlPatterns;
import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.xml.XmlAttribute;
import com.intellij.psi.xml.XmlElementType;
import com.intellij.util.ProcessingContext;
import com.intellij.xml.XmlAttributeDescriptor;
import org.jetbrains.annotations.NotNull;

import static com.intellij.codeInsight.completion.XmlCompletionContributor.hasEnumerationReference;
import static com.intellij.patterns.PlatformPatterns.psiElement;
import static com.intellij.patterns.XmlPatterns.xmlAttribute;
import static com.intellij.patterns.XmlPatterns.xmlTag;
import static com.intellij.psi.filters.getters.XmlAttributeValueGetter.getEnumeratedValues;

/**
 * @author yole
 */
public class XmlNonFirstCompletionContributor extends CompletionContributor {
  public XmlNonFirstCompletionContributor() {
    extend(CompletionType.BASIC, psiElement().inside(xmlAttribute()), new XmlAttributeReferenceCompletionProvider());
    extend(CompletionType.BASIC, psiElement().inside(xmlTag()), new TagNameReferenceCompletionProvider());
    extend(CompletionType.BASIC, psiElement().inside(XmlPatterns.xmlAttributeValue()), new CompletionProvider<CompletionParameters>() {
      @Override
      protected void addCompletions(@NotNull CompletionParameters parameters,
                                    ProcessingContext context,
                                    @NotNull CompletionResultSet result) {
        PsiElement position = parameters.getPosition();
        if (position.getNode().getElementType() != XmlElementType.XML_ATTRIBUTE_VALUE_TOKEN) return;
        XmlAttribute attr = PsiTreeUtil.getParentOfType(position, XmlAttribute.class);
        if (attr != null && !hasEnumerationReference(parameters, result)) {
          final XmlAttributeDescriptor descriptor = attr.getDescriptor();

          if (descriptor != null) {
            if (descriptor.isFixed() && descriptor.getDefaultValue() != null) {
              result.addElement(LookupElementBuilder.create(descriptor.getDefaultValue()));
              return;
            }
            for (String value : getEnumeratedValues(attr)) {
              result.addElement(LookupElementBuilder.create(value));
            }
          }
        }
      }
    });

  }
}