xml/dom-impl/src/com/intellij/util/xml/DomUsageTypeProvider.java

/*
 * 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.util.xml;

import com.intellij.lang.xml.XMLLanguage;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.xml.XmlFile;
import com.intellij.usages.impl.rules.UsageType;
import com.intellij.usages.impl.rules.UsageTypeProvider;
import org.jetbrains.annotations.Nullable;

/**
 * @author Gregory.Shrago
 */
public class DomUsageTypeProvider implements UsageTypeProvider {
  @Override
  @Nullable
  public UsageType getUsageType(PsiElement element) {
    final PsiFile psiFile = element.getContainingFile();
    if (psiFile != null && XMLLanguage.INSTANCE.equals(psiFile.getLanguage()) &&
        DomManager.getDomManager(element.getProject()).getFileElement((XmlFile)psiFile, DomElement.class) != null) {
      return DOM_USAGE_TYPE;
    }
    return null;
  }

  private static final UsageType DOM_USAGE_TYPE = new UsageType(DomBundle.message("dom.usage.type"));
}