Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2005 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 com.coretek.testcase.projectView.action; import java.util.Iterator; import java.util.List; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IResource; import org.eclipse.core.runtime.IPath; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWTError; import org.eclipse.swt.dnd.Clipboard; import org.eclipse.swt.dnd.DND; import org.eclipse.swt.dnd.FileTransfer; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.actions.SelectionListenerAction; import org.eclipse.ui.part.ResourceTransfer; import com.coretek.tools.ide.internal.ui.IHelpContextIds; /** * Standard action for copying the currently selected resources to the * clipboard. * <p> * This class may be instantiated; it is not intended to be subclassed. * </p> * * @since 2.0 */ public class CopyAction extends SelectionListenerAction { /** * The id of this action. */ public static final String ID = PlatformUI.PLUGIN_ID + ".CopyAction"; //$NON-NLS-1$ /** * The shell in which to show any dialogs. */ private Shell shell; /** * System clipboard */ private Clipboard clipboard; /** * Associated paste action. May be <code>null</code> */ private PasteAction pasteAction; /** * Creates a new action. * * @param shell the shell for any dialogs * @param clipboard a platform clipboard */ public CopyAction(Shell shell, Clipboard clipboard) { super(Messages.getString("CopyAction.title")); //$NON-NLS-1$ assert shell != null; assert clipboard != null; this.shell = shell; this.clipboard = clipboard; setToolTipText(Messages.getString("CopyAction.toolTip")); //$NON-NLS-1$ setId(CopyAction.ID); PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IHelpContextIds.COPY_ACTION); } /** * Creates a new action. * * @param shell the shell for any dialogs * @param clipboard a platform clipboard * @param pasteAction a paste action * * @since 2.0 */ public CopyAction(Shell shell, Clipboard clipboard, PasteAction pasteAction) { this(shell, clipboard); this.pasteAction = pasteAction; } /** * The <code>CopyAction</code> implementation of this method defined on * <code>IAction</code> copies the selected resources to the clipboard. */ public void run() { List selectedResources = getSelectedResources(); IResource[] resources = (IResource[]) selectedResources.toArray(new IResource[selectedResources.size()]); // Get the file names and a string representation final int length = resources.length; int actualLength = 0; String[] fileNames = new String[length]; StringBuffer buf = new StringBuffer(); for (int i = 0; i < length; i++) { IPath location = resources[i].getLocation(); // location may be null. See bug 29491. if (location != null) fileNames[actualLength++] = location.toOSString(); if (i > 0) buf.append("\n"); //$NON-NLS-1$ buf.append(resources[i].getName()); } // was one or more of the locations null? if (actualLength < length) { String[] tempFileNames = fileNames; fileNames = new String[actualLength]; for (int i = 0; i < actualLength; i++) fileNames[i] = tempFileNames[i]; } setClipboard(resources, fileNames, buf.toString()); // update the enablement of the paste action // workaround since the clipboard does not suppot callbacks if (pasteAction != null && pasteAction.getStructuredSelection() != null) pasteAction.selectionChanged(pasteAction.getStructuredSelection()); } /** * Set the clipboard contents. Prompt to retry if clipboard is busy. * * @param resources the resources to copy to the clipboard * @param fileNames file names of the resources to copy to the clipboard * @param names string representation of all names */ private void setClipboard(IResource[] resources, String[] fileNames, String names) { try { // set the clipboard contents if (fileNames.length > 0) { clipboard.setContents(new Object[] { resources, fileNames, names }, new Transfer[] { ResourceTransfer.getInstance(), FileTransfer.getInstance(), TextTransfer.getInstance() }); } else { clipboard.setContents(new Object[] { resources, names }, new Transfer[] { ResourceTransfer.getInstance(), TextTransfer.getInstance() }); } } catch (SWTError e) { if (e.code != DND.ERROR_CANNOT_SET_CLIPBOARD) throw e; if (MessageDialog.openQuestion(shell, Messages.getString("CopyToClipboardProblemDialog.title"), //$NON-NLS-1$ Messages.getString("CopyToClipboardProblemDialog.message"))) //$NON-NLS-1$ setClipboard(resources, fileNames, names); } } /** * The <code>CopyAction</code> implementation of this * <code>SelectionListenerAction</code> method enables this action if one or * more resources of compatible types are selected. */ protected boolean updateSelection(IStructuredSelection selection) { if (!super.updateSelection(selection)) return false; if (getSelectedNonResources().size() > 0) return false; List selectedResources = getSelectedResources(); if (selectedResources.size() == 0) return false; boolean projSelected = selectionIsOfType(IResource.PROJECT); boolean fileFoldersSelected = selectionIsOfType(IResource.FILE | IResource.FOLDER); if (!projSelected && !fileFoldersSelected) return false; // selection must be homogeneous if (projSelected && fileFoldersSelected) return false; // must have a common parent IContainer firstParent = ((IResource) selectedResources.get(0)).getParent(); if (firstParent == null) return false; Iterator resourcesEnum = selectedResources.iterator(); while (resourcesEnum.hasNext()) { IResource currentResource = (IResource) resourcesEnum.next(); if (!currentResource.getParent().equals(firstParent)) return false; // resource location must exist if (currentResource.getLocation() == null) return false; } return true; } }