android/src/com/intellij/android/designer/model/viewAnimator/RadTypeSwitcherLayout.java

/*
 * Copyright 2000-2012 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.android.designer.model.viewAnimator;

import com.intellij.android.designer.model.PropertyParser;
import com.intellij.android.designer.model.RadModelBuilder;
import com.intellij.android.designer.model.RadViewComponent;
import com.intellij.android.designer.model.ViewsMetaManager;
import com.intellij.designer.designSurface.OperationContext;
import com.intellij.designer.model.MetaManager;
import com.intellij.designer.model.MetaModel;
import com.intellij.designer.model.RadComponent;

/**
 * @author Alexander Lobas
 */
public class RadTypeSwitcherLayout extends RadViewSwitcherLayout {
  private final String myTypeTag;
  private MetaModel myTypeModel;

  public RadTypeSwitcherLayout(String tag) {
    myTypeTag = tag;
  }

  @Override
  protected boolean checkChildOperation(OperationContext context) {
    if (super.checkChildOperation(context)) {
      if (myTypeModel == null) {
        MetaManager manager = ViewsMetaManager.getInstance(((RadViewComponent)myContainer).getTag().getProject());
        myTypeModel = manager.getModelByTag(myTypeTag);
      }

      PropertyParser parser = RadModelBuilder.getPropertyParser(myContainer);
      if (parser != null) {
        for (RadComponent component : context.getComponents()) {
          if (!parser.isAssignableFrom(myTypeModel, component.getMetaModel())) {
            return false;
          }
        }
      }

      return true;
    }

    return false;
  }
}