platform/platform-api/src/com/intellij/ui/TreeCopyProvider.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.ui;

import com.intellij.ide.CopyProvider;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.diagnostic.Logger;
import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.awt.datatransfer.Clipboard;

/**
 * @author yole
 */
public class TreeCopyProvider implements CopyProvider {
  private static final Logger LOG = Logger.getInstance("#com.intellij.ui.TreeCopyProvider");
  private final JTree myTree;

  public TreeCopyProvider(final JTree tree) {
    myTree = tree;
  }

  public void performCopy(@NotNull DataContext dataContext) {
    try {
      final Clipboard clipboard = myTree.getToolkit().getSystemClipboard();
      myTree.getTransferHandler().exportToClipboard(myTree, clipboard, TransferHandler.COPY);
    }
    catch(Exception ex) {
      // probably don't have clipboard access or something
      LOG.info(ex);
    }
  }

  public boolean isCopyEnabled(@NotNull DataContext dataContext) {
    return myTree.getSelectionPath() != null;
  }

  public boolean isCopyVisible(@NotNull DataContext dataContext) {
    return true;
  }
}