content: /*******************************************************************************
   * Copyright (c) 2000, 2007 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.infoviews;
  
  import org.eclipse.jface.dialogs.MessageDialog;
  import org.eclipse.jface.text.ITextSelection;
  import org.eclipse.swt.SWTError;
  import org.eclipse.swt.dnd.Clipboard;
  import org.eclipse.swt.dnd.DND;
  import org.eclipse.swt.dnd.TextTransfer;
  import org.eclipse.swt.dnd.Transfer;
  import org.eclipse.ui.ISharedImages;
  import org.eclipse.ui.IWorkbenchSite;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.ui.texteditor.IAbstractTextEditorHelpContextIds;
  import org.eclipse.wst.jsdt.ui.actions.SelectionDispatchAction;
  
  class CopyToClipboardAction extends SelectionDispatchAction{
  
  	private final static int MAX_REPEAT_COUNT= 10;
  
  	private Clipboard fClipboard;
  
  	public CopyToClipboardAction(IWorkbenchSite site) {
  		super(site);
  
  		setText(InfoViewMessages.CopyAction_label);
  		setToolTipText(InfoViewMessages.CopyAction_tooltip);
  		setDescription(InfoViewMessages.CopyAction_description);
  
  		ISharedImages workbenchImages= PlatformUI.getWorkbench().getSharedImages();
  		setDisabledImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_COPY_DISABLED));
  		setImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_COPY));
  		setHoverImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_COPY));
  
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IAbstractTextEditorHelpContextIds.COPY_ACTION);
  
  		update(getSelection());
  	}
  
  	public void selectionChanged(ITextSelection selection) {
  		setEnabled(selection != null && selection.getLength() > 0);
  	}
  
  	public void run(ITextSelection selection) {
  		fClipboard= new Clipboard(getShell().getDisplay());
  		try {
  			copyToClipboard(selection, 0);
  		} finally {
  			fClipboard.dispose();
  		}
  	}
  
  	private void copyToClipboard(ITextSelection selection, int repeatCount) {
  		try{
  			fClipboard.setContents(new String[] { selection.getText() }, new Transfer[] { TextTransfer.getInstance() });
  		} catch (SWTError e) {
  			if (e.code != DND.ERROR_CANNOT_SET_CLIPBOARD || repeatCount >= MAX_REPEAT_COUNT)
  				throw e;
  
  			if (MessageDialog.openQuestion(getShell(), InfoViewMessages.CopyToClipboard_error_title, InfoViewMessages.CopyToClipboard_error_message))
  				copyToClipboard(selection, repeatCount + 1);
  		}
  	}
  }
  