xml/xml-analysis-impl/src/com/intellij/xml/util/CheckDtdReferencesInspection.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.xml.util;

import com.intellij.codeHighlighting.HighlightDisplayLevel;
import com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor;
import com.intellij.codeInspection.ProblemsHolder;
import com.intellij.codeInspection.XmlInspectionGroupNames;
import com.intellij.codeInspection.XmlSuppressableInspectionTool;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.psi.PsiElementVisitor;
import com.intellij.psi.PsiReference;
import com.intellij.psi.XmlElementVisitor;
import com.intellij.psi.xml.XmlElement;
import com.intellij.psi.xml.XmlElementContentSpec;
import com.intellij.psi.xml.XmlEntityRef;
import com.intellij.xml.XmlBundle;
import org.jetbrains.annotations.NotNull;

/**
 * @author Maxim Mossienko
 */
public class CheckDtdReferencesInspection extends XmlSuppressableInspectionTool {
  @Override
  public boolean isEnabledByDefault() {
    return true;
  }

  @Override
  @NotNull
  public PsiElementVisitor buildVisitor(@NotNull final ProblemsHolder holder, boolean isOnTheFly) {
    return new XmlElementVisitor() {
      @Override
      public void visitXmlElement(final XmlElement element) {
        if (element instanceof XmlElementContentSpec ||
            element instanceof XmlEntityRef
          ) {
          doCheckRefs(element, holder);
        }
      }
    };
  }

  private static void doCheckRefs(final XmlElement element, final ProblemsHolder holder) {
    for (PsiReference ref : element.getReferences()) {
      ProgressManager.checkCanceled();
      if (XmlHighlightVisitor.hasBadResolve(ref, true)) {
        if (ref.getElement() instanceof XmlElementContentSpec) {
          final String image = ref.getCanonicalText();
          if (image.equals("-") || image.equals("O")) continue;
        }
        holder.registerProblem(ref);
      }
    }
  }

  @Override
  @NotNull
  public HighlightDisplayLevel getDefaultLevel() {
    return HighlightDisplayLevel.ERROR;
  }

  @Override
  @NotNull
  public String getGroupDisplayName() {
    return XmlInspectionGroupNames.XML_INSPECTIONS;
  }

  @Override
  @NotNull
  public String getDisplayName() {
    return XmlBundle.message("xml.inspections.check.dtd.references");
  }
}