XmlLanguageBreadcrumbsInfoProvider.java

/*
 * Copyright 2000-2016 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.breadcrumbs;

import com.intellij.lang.Language;
import com.intellij.lang.html.HTMLLanguage;
import com.intellij.lang.xhtml.XHTMLLanguage;
import com.intellij.lang.xml.XMLLanguage;
import com.intellij.psi.PsiElement;
import com.intellij.psi.xml.XmlAttribute;
import com.intellij.psi.xml.XmlTag;
import com.intellij.xml.util.HtmlUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class XmlLanguageBreadcrumbsInfoProvider extends BreadcrumbsInfoProvider {
  @Override
  public boolean acceptElement(@NotNull final PsiElement e) {
    return e instanceof XmlTag && e.isValid();
  }

  @Override
  public Language[] getLanguages() {
    return new Language[]{XMLLanguage.INSTANCE, XHTMLLanguage.INSTANCE, HTMLLanguage.INSTANCE};
  }

  @Override
  @NotNull
  public String getElementInfo(@NotNull final PsiElement e) {
    final XmlTag tag = (XmlTag)e;
    final boolean addHtmlInfo = e.getContainingFile().getLanguage() != XMLLanguage.INSTANCE;
    return addHtmlInfo ? HtmlUtil.getTagPresentation(tag) : tag.getName();
  }

  @Override
  @Nullable
  public String getElementTooltip(@NotNull final PsiElement e) {
    final XmlTag tag = (XmlTag)e;
    final StringBuilder result = new StringBuilder("<");
    result.append(tag.getName());
    final XmlAttribute[] attributes = tag.getAttributes();
    for (final XmlAttribute each : attributes) {
      result.append(" ").append(each.getText());
    }

    if (tag.isEmpty()) {
      result.append("/>");
    }
    else {
      result.append(">...</").append(tag.getName()).append(">");
    }

    return result.toString();
  }
}