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

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.util.xml.impl;
  17
  18 import com.intellij.psi.impl.source.xml.XmlElementDescriptorProvider;
  19 import com.intellij.psi.xml.XmlTag;
  20 import com.intellij.psi.PsiElement;
  21 import com.intellij.xml.XmlElementDescriptor;
  22 import com.intellij.xml.impl.dom.DomElementXmlDescriptor;
  23 import com.intellij.util.xml.DomElement;
  24 import com.intellij.util.xml.DomManager;
  25 import com.intellij.util.xml.DefinesXml;
  26 import org.jetbrains.annotations.Nullable;
  27
  28 /**
  29  * @author yole
  30  */
  31 public class DomDescriptorProvider implements XmlElementDescriptorProvider {
  32
  33   @Nullable
  34   public XmlElementDescriptor getDescriptor(final XmlTag tag) {
  35     final DomElement domElement = DomManager.getDomManager(tag.getProject()).getDomElement(tag);
  36     if (domElement != null) {
  37       final DefinesXml definesXml = domElement.getAnnotation(DefinesXml.class);
  38       if (definesXml != null) {
  39         return new DomElementXmlDescriptor(domElement);
  40       }
  41       final PsiElement parent = tag.getParent();
  42       if (parent instanceof XmlTag) {
  43         final XmlElementDescriptor descriptor = ((XmlTag)parent).getDescriptor();
  44
  45         if (descriptor != null && descriptor instanceof DomElementXmlDescriptor) {
  46           return descriptor.getElementDescriptor(tag, (XmlTag)parent);
  47         }
  48       }
  49     }
  50
  51     return null;
  52   }
  53 }