xml/xml-structure-view-impl/src/com/intellij/ide/structureView/impl/xml/DtdFileTreeElement.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.ide.structureView.impl.xml;

import com.intellij.ide.structureView.StructureViewTreeElement;
import com.intellij.ide.structureView.impl.common.PsiTreeElementBase;
import com.intellij.openapi.util.Comparing;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiNamedElement;
import com.intellij.psi.search.PsiElementProcessor;
import com.intellij.psi.xml.*;
import com.intellij.util.PlatformIcons;
import com.intellij.xml.impl.dtd.XmlElementDescriptorImpl;
import com.intellij.xml.util.XmlUtil;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.util.*;

public class DtdFileTreeElement extends PsiTreeElementBase<XmlFile> {
  public DtdFileTreeElement(XmlFile file) {
    super(file);
  }

  @Override
  @NotNull
  public Collection<StructureViewTreeElement> getChildrenBase() {
    return collectElements(getElement().getDocument());
  }

  static List<StructureViewTreeElement> collectElements(final XmlElement element) {
    final List<StructureViewTreeElement> elements = new ArrayList<StructureViewTreeElement>();

    XmlUtil.processXmlElements(element, new PsiElementProcessor() {
      @Override
      public boolean execute(@NotNull final PsiElement element) {
        if (element instanceof XmlElementDecl ||
            element instanceof XmlEntityDecl) {
          elements.add(new DtdTreeElement((PsiNamedElement)element));
        }
        return true;
      }
    }, false);
    return elements;
  }

  @Override
  public String getPresentableText() {
    return getElement().getName();
  }

  private static class DtdTreeElement extends PsiTreeElementBase<PsiNamedElement> {
    @NonNls private static final String IMPLIED = "implied";
    @NonNls private static final String REQUIRED = "required";
    @NonNls private static final String FIXED = "fixed";
    @NonNls private static final String ID = "id";
    @NonNls private static final String IDREF = "idref";
    @NonNls private static final String ENUM = "enum";

    public DtdTreeElement(final PsiNamedElement element) {
      super(element);
    }

    @Override
    @NotNull
    public Collection<StructureViewTreeElement> getChildrenBase() {
      return Collections.emptyList();
    }

    @Override
    public String getPresentableText() {
      final PsiNamedElement namedElement = getElement();
      return namedElement != null ? namedElement.getName():"";
    }

    @Override
    public Icon getIcon(final boolean open) {
      return PlatformIcons.XML_TAG_ICON;
    }

    @Override
    public String getLocationString() {
      final XmlElement owner = (XmlElement)getElement();

      final XmlAttlistDecl[] attLists= owner instanceof XmlElementDecl ? XmlElementDescriptorImpl.getCachedAttributeDeclarations(owner): XmlAttlistDecl.EMPTY_ARRAY;

      if (attLists.length > 0) {
        Map<String,XmlAttributeDecl> attrMap = null;

        final String name = getElement().getName();
        for(XmlAttlistDecl a:attLists) {
          final String aname = a.getName();
          if (!Comparing.equal(aname, name)) continue;
          if (attrMap == null) attrMap = new LinkedHashMap<String, XmlAttributeDecl>();

          for(XmlAttributeDecl d : a.getAttributeDecls()) {
            attrMap.put(d.getName(), d);
          }
        }

        StringBuilder b = null;
        if (attrMap != null) {
          for(Map.Entry<String,XmlAttributeDecl> e:attrMap.entrySet()) {
            if (b == null) b = new StringBuilder();
            else b.append(", ");
            b.append(e.getKey());
            final XmlAttributeDecl attributeDecl = e.getValue();
            String type = null;

            if (attributeDecl.isIdAttribute()) {
              type = ID;
            } else if (attributeDecl.isIdRefAttribute()) {
              type = IDREF;
            } else if (attributeDecl.isEnumerated()) {
              type = ENUM;
            }

            if (attributeDecl.isAttributeFixed()) {
              if (type == null) type = FIXED;
              else type += " " + FIXED;
            } else if (attributeDecl.isAttributeRequired()) {
              if (type == null) type = REQUIRED;
              else type += " " + REQUIRED;
            } else if (attributeDecl.isAttributeImplied()) {
              if (type == null) type = IMPLIED;
              else type += " " + IMPLIED;
            }

            if (type != null) b.append(':').append(type);
            final XmlAttributeValue value = attributeDecl.getDefaultValue();

            if (value != null) b.append("=").append(value);
          }
        }

        if (b != null) return b.toString();
     }
     return super.getLocationString();
    }

    public String toString() {
      final String s = getLocationString();
      final String name = getElement().getName();
      if (s == null || s.length() == 0) return name;
      return name + " (" + s + ")";
    }
  }


}