xml/impl/src/com/intellij/lang/xml/XmlElementRenameValidator.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.lang.xml;

import com.intellij.patterns.ElementPattern;
import com.intellij.patterns.StandardPatterns;
import com.intellij.patterns.XmlPatterns;
import com.intellij.psi.PsiElement;
import com.intellij.psi.xml.XmlAttributeDecl;
import com.intellij.psi.xml.XmlElementDecl;
import com.intellij.refactoring.rename.RenameInputValidator;
import com.intellij.util.ProcessingContext;
import com.intellij.xml.XmlAttributeDescriptor;
import com.intellij.xml.XmlElementDescriptor;

import static com.intellij.patterns.PlatformPatterns.psiElement;
import static com.intellij.patterns.StandardPatterns.or;

public class XmlElementRenameValidator implements RenameInputValidator {
  @Override
  public ElementPattern<? extends PsiElement> getPattern() {
    return or(
      XmlPatterns.xmlTag().withMetaData(
        or(StandardPatterns.instanceOf(XmlElementDescriptor.class),
           StandardPatterns.instanceOf(XmlAttributeDescriptor.class))
      ),
      psiElement(XmlElementDecl.class),
      psiElement(XmlAttributeDecl.class),
      XmlPatterns.xmlTag().withDescriptor(
        or(StandardPatterns.instanceOf(XmlElementDescriptor.class),
           StandardPatterns.instanceOf(XmlAttributeDescriptor.class))
      )
    );
  }

  @Override
  public boolean isInputValid(final String newName, final PsiElement element, final ProcessingContext context) {
    return newName.trim().matches("([\\d\\w\\_\\.\\-]+:)?[\\d\\w\\_\\.\\-]+");
  }
}