Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2011 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.jdt.internal.ui.refactoring.reorg; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Iterator; import java.util.List; import com.ibm.icu.text.MessageFormat; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.core.runtime.CoreException; import org.eclipse.jface.action.IAction; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.IWorkbenchSite; import org.eclipse.ui.IWorkingSet; import org.eclipse.ui.IWorkingSetManager; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.actions.DeleteResourceAction; import org.eclipse.jdt.internal.corext.refactoring.RefactoringAvailabilityTester; import org.eclipse.jdt.internal.corext.refactoring.RefactoringExecutionStarter; import org.eclipse.jdt.internal.corext.refactoring.reorg.ReorgUtils; import org.eclipse.jdt.ui.actions.SelectionDispatchAction; import org.eclipse.jdt.internal.ui.IJavaHelpContextIds; import org.eclipse.jdt.internal.ui.JavaPlugin; import org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart; import org.eclipse.jdt.internal.ui.refactoring.RefactoringMessages; import org.eclipse.jdt.internal.ui.util.ExceptionHandler; import org.eclipse.jdt.internal.ui.util.SelectionUtil; import org.eclipse.jdt.internal.ui.workingsets.IWorkingSetIDs; import org.eclipse.jdt.internal.ui.workingsets.WorkingSetModel; public class DeleteAction extends SelectionDispatchAction { /** * 'Hide' button index. * * @since 3.5 */ private static final int HIDE_BUTTON = 0; /** * 'Remove' button index. * * @since 3.5 */ private static final int REMOVE_BUTTON = 1; public DeleteAction(IWorkbenchSite site) { super(site); setText(ReorgMessages.DeleteAction_3); setDescription(ReorgMessages.DeleteAction_4); ISharedImages workbenchImages = JavaPlugin.getDefault().getWorkbench().getSharedImages(); setDisabledImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_DELETE_DISABLED)); setImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_DELETE)); setHoverImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_DELETE)); PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.DELETE_ACTION); } /* * @see SelectionDispatchAction#selectionChanged(IStructuredSelection) */ @Override public void selectionChanged(IStructuredSelection selection) { if (ReorgUtils.containsOnlyProjects(selection.toList())) { setEnabled(createWorkbenchAction(selection).isEnabled()); return; } setEnabled(RefactoringAvailabilityTester.isDeleteAvailable(selection.toArray())); } private IAction createWorkbenchAction(IStructuredSelection selection) { DeleteResourceAction action = new DeleteResourceAction(getSite()); action.selectionChanged(selection); return action; } /** * Removes or hides the selected working sets. * * @param selection the selected working sets * @since 3.5 */ private void deleteWorkingSets(IStructuredSelection selection) { MessageDialog dialog; if (selection.size() == 1) { IWorkingSet workingSet = (IWorkingSet) selection.getFirstElement(); final String workingSetID = workingSet.getId(); String dialogMessage; if (isDefaultWorkingSet(workingSetID)) dialogMessage = MessageFormat.format(ReorgMessages.DeleteWorkingSet_hideworkingset_single, new Object[] { workingSet.getLabel() }); else dialogMessage = MessageFormat.format(ReorgMessages.DeleteWorkingSet_removeorhideworkingset_single, new Object[] { workingSet.getLabel() }); dialog = new MessageDialog(getShell(), ReorgMessages.DeleteWorkingSet_single, null, dialogMessage, MessageDialog.QUESTION, new String[] { ReorgMessages.DeleteWorkingSet_Hide, ReorgMessages.DeleteWorkingSet_Remove, IDialogConstants.CANCEL_LABEL }, 0) { /* * @see org.eclipse.jface.dialogs.MessageDialog#createButton(org.eclipse.swt.widgets.Composite, int, java.lang.String, boolean) * @since 3.5 */ @Override protected Button createButton(Composite parent, int id, String label, boolean defaultButton) { Button button = super.createButton(parent, id, label, defaultButton); if (id == REMOVE_BUTTON && IWorkingSetIDs.OTHERS.equals(workingSetID)) button.setEnabled(false); return button; } }; } else { dialog = new MessageDialog(getShell(), ReorgMessages.DeleteWorkingSet_multiple, null, MessageFormat.format(ReorgMessages.DeleteWorkingSet_removeorhideworkingset_multiple, new Object[] { new Integer(selection.size()) }), MessageDialog.QUESTION, new String[] { ReorgMessages.DeleteWorkingSet_Hide, ReorgMessages.DeleteWorkingSet_Remove, IDialogConstants.CANCEL_LABEL }, 0); } int dialogResponse = dialog.open(); if (dialogResponse == REMOVE_BUTTON) { Iterator<?> iter = selection.iterator(); IWorkingSetManager manager = PlatformUI.getWorkbench().getWorkingSetManager(); while (iter.hasNext()) { IWorkingSet workingSet = (IWorkingSet) iter.next(); if (isDefaultWorkingSet(workingSet.getId())) hideWorkingSets(Collections.singletonList(workingSet)); else manager.removeWorkingSet(workingSet); } } else if (dialogResponse == HIDE_BUTTON) { hideWorkingSets((List<IWorkingSet>) SelectionUtil.toList(selection)); } } /** * Hides all the working sets in the list from the Package Explorer. * * @param selection the selection of working sets * @since 3.8 */ private void hideWorkingSets(List<IWorkingSet> selection) { IWorkbenchPage page = JavaPlugin.getActivePage(); if (page != null) { IWorkbenchPart activePart = page.getActivePart(); if (activePart instanceof PackageExplorerPart) { PackageExplorerPart packagePart = (PackageExplorerPart) activePart; WorkingSetModel model = packagePart.getWorkingSetModel(); List<IWorkingSet> activeWorkingSets = new ArrayList<IWorkingSet>( Arrays.asList(model.getActiveWorkingSets())); activeWorkingSets.removeAll(selection); model.setActiveWorkingSets(activeWorkingSets.toArray(new IWorkingSet[activeWorkingSets.size()])); } } } /** * Checks if the working set is the default working set. * * @param workingSetID the working set id, can be <code>null</code> * @return <code>true</code> if default working set, <code>false</code> otherwise * @since 3.8 */ private boolean isDefaultWorkingSet(String workingSetID) { return IWorkingSetIDs.OTHERS.equals(workingSetID); } /* (non-Javadoc) * @see org.eclipse.jdt.ui.actions.SelectionDispatchAction#run(org.eclipse.jface.viewers.IStructuredSelection) */ @Override public void run(IStructuredSelection selection) { if (ReorgUtils.containsOnlyProjects(selection.toList())) { createWorkbenchAction(selection).run(); return; } if (ReorgUtils.containsOnlyWorkingSets(selection.toList())) { deleteWorkingSets(selection); return; } try { RefactoringExecutionStarter.startDeleteRefactoring(selection.toArray(), getShell()); } catch (CoreException e) { ExceptionHandler.handle(e, RefactoringMessages.OpenRefactoringWizardAction_refactoring, RefactoringMessages.OpenRefactoringWizardAction_exception); } } }