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 * Rodrigo Kumpera <kumpera AT gmail.com> - bug 95232 * *******************************************************************************/ package ext.org.eclipse.jdt.internal.ui.workingsets; import org.eclipse.swt.custom.BusyIndicator; import org.eclipse.swt.widgets.Composite; import org.eclipse.core.runtime.IAdaptable; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.IWorkbenchWindow; import org.eclipse.ui.IWorkingSet; import org.eclipse.ui.PlatformUI; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.ui.JavaElementComparator; import org.eclipse.jdt.ui.JavaElementLabels; import patch.org.eclipse.jdt.internal.ui.JavaPlugin; import ext.org.eclipse.jdt.internal.ui.IJavaHelpContextIds; import ext.org.eclipse.jdt.internal.ui.JavaPluginImages; import ext.org.eclipse.jdt.internal.ui.actions.SelectionConverter; import ext.org.eclipse.jdt.internal.ui.filters.EmptyInnerPackageFilter; import ext.org.eclipse.jdt.internal.ui.packageview.PackageFragmentRootContainer; import ext.org.eclipse.jdt.internal.ui.viewsupport.AppearanceAwareLabelProvider; import ext.org.eclipse.jdt.internal.ui.viewsupport.DecoratingJavaLabelProvider; import ext.org.eclipse.jdt.internal.ui.viewsupport.JavaElementImageProvider; /** * The Java working set page allows the user to create * and edit a Java working set. * <p> * Workspace elements can be added/removed from a tree into * a list. * </p> * * @since 2.0 */ public class JavaWorkingSetPage extends AbstractWorkingSetWizardPage { final private static String PAGE_TITLE = WorkingSetMessages.JavaWorkingSetPage_title; final private static String PAGE_NAME = "javaWorkingSetPage"; //$NON-NLS-1$ private IStructuredSelection fInitialSelection; /** * Default constructor. */ public JavaWorkingSetPage() { super(PAGE_NAME, PAGE_TITLE, JavaPluginImages.DESC_WIZBAN_JAVA_WORKINGSET); setDescription(WorkingSetMessages.JavaWorkingSetPage_workingSet_description); IWorkbenchWindow activeWorkbenchWindow = JavaPlugin.getActiveWorkbenchWindow(); if (activeWorkbenchWindow != null) { ISelection selection = activeWorkbenchWindow.getSelectionService().getSelection(); if (selection instanceof IStructuredSelection) fInitialSelection = (IStructuredSelection) selection; } } public void setInitialSelection(IStructuredSelection selection) { fInitialSelection = selection; } @Override protected String getPageId() { return "org.eclipse.jdt.ui.JavaWorkingSetPage"; //$NON-NLS-1$ } /** * {@inheritDoc} */ @Override public void createControl(Composite parent) { super.createControl(parent); // Set help for the page PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, IJavaHelpContextIds.JAVA_WORKING_SET_PAGE); } /** * {@inheritDoc} */ @Override protected void configureTree(TreeViewer tree) { tree.setContentProvider(new JavaWorkingSetPageContentProvider()); AppearanceAwareLabelProvider javaElementLabelProvider = new AppearanceAwareLabelProvider( AppearanceAwareLabelProvider.DEFAULT_TEXTFLAGS | JavaElementLabels.P_COMPRESSED, AppearanceAwareLabelProvider.DEFAULT_IMAGEFLAGS | JavaElementImageProvider.SMALL_ICONS); tree.setLabelProvider(new DecoratingJavaLabelProvider(javaElementLabelProvider)); tree.setComparator(new JavaElementComparator()); tree.addFilter(new EmptyInnerPackageFilter()); tree.setInput(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot())); if (getSelection() == null) return; Object[] selection = getInitialTreeSelection(); if (selection.length > 0) { try { tree.getTree().setRedraw(false); for (int i = 0; i < selection.length; i++) { tree.expandToLevel(selection[i], 0); } tree.setSelection(new StructuredSelection(selection)); } finally { tree.getTree().setRedraw(true); } } } /** * {@inheritDoc} */ @Override protected void configureTable(TableViewer table) { AppearanceAwareLabelProvider javaElementLabelProvider = new AppearanceAwareLabelProvider( AppearanceAwareLabelProvider.DEFAULT_TEXTFLAGS | JavaElementLabels.P_COMPRESSED | JavaElementLabels.ROOT_POST_QUALIFIED | JavaElementLabels.P_POST_QUALIFIED, AppearanceAwareLabelProvider.DEFAULT_IMAGEFLAGS | JavaElementImageProvider.SMALL_ICONS); table.setLabelProvider(new DecoratingJavaLabelProvider(javaElementLabelProvider)); table.setComparator(new JavaElementComparator()); } /** * {@inheritDoc} */ @Override protected Object[] getInitialWorkingSetElements(IWorkingSet workingSet) { Object[] elements; if (workingSet == null) { if (fInitialSelection == null) return new IAdaptable[0]; elements = fInitialSelection.toArray(); } else { elements = workingSet.getElements(); } // Use closed project for elements in closed project and remove PackageFragmentRootContainer elements int deletedElements = 0; for (int i = 0; i < elements.length; i++) { Object element = elements[i]; if (element instanceof IResource) { IProject project = ((IResource) element).getProject(); if (!project.isAccessible()) elements[i] = project; } else if (element instanceof PackageFragmentRootContainer) { for (int j = i; j < elements.length - 1; j++) elements[j] = elements[j + 1]; deletedElements++; } else if (element instanceof IJavaElement) { IJavaProject jProject = ((IJavaElement) element).getJavaProject(); if (jProject != null && !jProject.getProject().isAccessible()) elements[i] = jProject.getProject(); } else if (!(element instanceof IAdaptable) || ((IAdaptable) element).getAdapter(IProject.class) == null) { for (int j = i; j < elements.length - 1; j++) elements[j] = elements[j + 1]; deletedElements++; } } if (deletedElements == 0) return elements; IAdaptable[] result = new IAdaptable[elements.length - deletedElements]; System.arraycopy(elements, 0, result, 0, result.length); return result; } private Object[] getInitialTreeSelection() { final Object[][] result = new Object[1][]; BusyIndicator.showWhile(getShell().getDisplay(), new Runnable() { public void run() { IStructuredSelection selection = fInitialSelection; if (selection == null) { IWorkbenchPage page = JavaPlugin.getActivePage(); if (page == null) return; IWorkbenchPart part = page.getActivePart(); if (part == null) return; try { selection = SelectionConverter.getStructuredSelection(part); } catch (JavaModelException e) { return; } } Object[] elements = selection.toArray(); for (int i = 0; i < elements.length; i++) { if (elements[i] instanceof IResource) { IJavaElement je = (IJavaElement) ((IResource) elements[i]).getAdapter(IJavaElement.class); if (je != null && je.exists() && je.getJavaProject().isOnClasspath((IResource) elements[i])) elements[i] = je; } } result[0] = elements; } }); if (result[0] == null) return new Object[0]; return result[0]; } }