plugins/ui-designer/src/com/intellij/uiDesigner/projectView/FormMoveProvider.java

/*
 * Copyright 2000-2009 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.uiDesigner.projectView;

import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.*;
import com.intellij.refactoring.move.MoveHandlerDelegate;
import com.intellij.refactoring.move.moveFilesOrDirectories.MoveFilesOrDirectoriesHandler;
import com.intellij.uiDesigner.GuiFormFileType;
import org.jetbrains.annotations.Nullable;

import java.util.Set;

/**
 * @author yole
 */
public class FormMoveProvider extends MoveHandlerDelegate {
  private static final Logger LOG = Logger.getInstance("#com.intellij.uiDesigner.projectView.FormMoveProvider");

  @Override
  public boolean canMove(DataContext dataContext) {
    Form[] forms = Form.DATA_KEY.getData(dataContext);
    return forms != null && forms.length > 0;
  }

  @Override
  public boolean isValidTarget(PsiElement psiElement, PsiElement[] sources) {
    return MoveFilesOrDirectoriesHandler.isValidTarget(psiElement);
  }

  public boolean canMove(PsiElement[] elements, @Nullable final PsiElement targetContainer) {
    return false;
  }

  @Override
  public void collectFilesOrDirsFromContext(DataContext dataContext, Set<PsiElement> filesOrDirs) {
    Form[] forms = Form.DATA_KEY.getData(dataContext);
    LOG.assertTrue(forms != null);
    PsiClass[] classesToMove = new PsiClass[forms.length];
    PsiFile[] filesToMove = new PsiFile[forms.length];
    for(int i=0; i<forms.length; i++) {
      classesToMove [i] = forms [i].getClassToBind();
      if (classesToMove[i] != null) {
        filesOrDirs.add(classesToMove[i].getContainingFile());
      }
      filesToMove [i] = forms [i].getFormFiles() [0];
      if (filesToMove[i] != null) {
        filesOrDirs.add(filesToMove[i]);
      }
    }
  }


  @Override
  public boolean isMoveRedundant(PsiElement source, PsiElement target) {
    if (source instanceof PsiFile && source.getParent() == target) {
      final VirtualFile virtualFile = ((PsiFile)source).getVirtualFile();
      if (virtualFile != null && virtualFile.getFileType() instanceof GuiFormFileType) {
        return true;
      }
    }
    return super.isMoveRedundant(source, target);
  }
}