Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2009 Code 9 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: * Code 9 Corporation - initial API and implementation * EclipseSource Corporation - ongoing enhancements * Rafael Oliveira Nobrega <rafael.oliveira@gmail.com> - bug 242028 *******************************************************************************/ package org.eclipse.pde.internal.ds.ui.editor.sections; import java.util.Iterator; import org.eclipse.core.resources.IProject; import org.eclipse.core.runtime.CoreException; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IType; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.search.SearchEngine; import org.eclipse.jdt.ui.IJavaElementSearchConstants; import org.eclipse.jdt.ui.JavaUI; import org.eclipse.jface.action.Action; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.jface.window.Window; import org.eclipse.osgi.util.NLS; import org.eclipse.pde.core.IModelChangedEvent; import org.eclipse.pde.internal.ds.core.IDSComponent; import org.eclipse.pde.internal.ds.core.IDSDocumentFactory; import org.eclipse.pde.internal.ds.core.IDSModel; import org.eclipse.pde.internal.ds.core.IDSProvide; import org.eclipse.pde.internal.ds.core.IDSService; import org.eclipse.pde.internal.ds.ui.Activator; import org.eclipse.pde.internal.ds.ui.Messages; import org.eclipse.pde.internal.ds.ui.editor.DSInputContext; import org.eclipse.pde.internal.ds.ui.editor.DSLabelProvider; import org.eclipse.pde.internal.ds.ui.editor.DSTypeSelectionExtension; import org.eclipse.pde.internal.ds.ui.editor.FormLayoutFactory; import org.eclipse.pde.internal.ds.ui.editor.dialogs.DSEditProvideDialog; import org.eclipse.pde.internal.ui.editor.PDEFormPage; import org.eclipse.pde.internal.ui.editor.TableSection; import org.eclipse.pde.internal.ui.editor.context.InputContextManager; import org.eclipse.pde.internal.ui.parts.EditableTablePart; import org.eclipse.pde.internal.ui.parts.TablePart; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Table; import org.eclipse.ui.PartInitException; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.actions.ActionFactory; import org.eclipse.ui.dialogs.SelectionDialog; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.Section; public class DSProvideSection extends TableSection implements IDoubleClickListener { private TableViewer fProvidesTable; private Action fRemoveAction; private Action fAddAction; private Action fEditAction; class ContentProvider implements IStructuredContentProvider { public Object[] getElements(Object inputElement) { if (inputElement instanceof IDSModel) { IDSModel model = (IDSModel) inputElement; IDSComponent component = model.getDSComponent(); if (component != null) { IDSService service = component.getService(); if (service != null) { return service.getProvidedServices(); } } } return new Object[0]; } public void dispose() { // do nothing } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { // do nothing } } public DSProvideSection(PDEFormPage page, Composite parent) { super(page, parent, Section.DESCRIPTION | Section.TWISTIE, new String[] { Messages.DSProvideSection_add, Messages.DSProvideSection_remove, Messages.DSProvideSection_edit }); createClient(getSection(), page.getEditor().getToolkit()); } protected void createClient(Section section, FormToolkit toolkit) { section.setDescription(Messages.DSProvideSection_description); section.setExpanded(true); section.setLayout(FormLayoutFactory.createClearGridLayout(false, 1)); GridData data = new GridData(GridData.FILL_BOTH); data.grabExcessVerticalSpace = true; section.setLayoutData(data); Composite container = createClientContainer(section, 2, toolkit); EditableTablePart tablePart = getTablePart(); tablePart.setEditable(isEditable()); createViewerPartControl(container, SWT.FULL_SELECTION | SWT.MULTI, 2, toolkit); fProvidesTable = tablePart.getTableViewer(); fProvidesTable.setContentProvider(new ContentProvider()); fProvidesTable.setLabelProvider(new DSLabelProvider()); fProvidesTable.setComparator(new ViewerComparator()); fProvidesTable.addDoubleClickListener(this); makeActions(); IDSModel model = getDSModel(); if (model != null) { fProvidesTable.setInput(model); model.addModelChangedListener(this); } toolkit.paintBordersFor(container); section.setClient(container); updateTitle(); } public void dispose() { IDSModel model = getDSModel(); if (model != null) model.removeModelChangedListener(this); } public void refresh() { fProvidesTable.refresh(); updateButtons(); updateTitle(); } protected void buttonSelected(int index) { switch (index) { case 0: handleAdd(); break; case 1: handleRemove(); break; case 2: handleEdit(); break; } } private void handleEdit() { ISelection selection = fProvidesTable.getSelection(); if (selection != null) { int selectionIndex = fProvidesTable.getTable().getSelectionIndex(); if (selectionIndex != -1) { DSEditProvideDialog dialog = new DSEditProvideDialog(Activator.getActiveWorkbenchShell(), (IDSProvide) fProvidesTable.getElementAt(selectionIndex), this); dialog.create(); dialog.getShell().setSize(500, 200); dialog.open(); } } } private void makeActions() { fAddAction = new Action(Messages.DSProvideSection_add) { public void run() { handleAdd(); } }; fAddAction.setEnabled(isEditable()); fRemoveAction = new Action(Messages.DSProvideSection_remove) { public void run() { handleRemove(); } }; fRemoveAction.setEnabled(isEditable()); fEditAction = new Action(Messages.DSProvideSection_edit) { public void run() { handleRemove(); } }; fEditAction.setEnabled(isEditable()); } private void updateButtons() { Table table = fProvidesTable.getTable(); TablePart tablePart = getTablePart(); tablePart.setButtonEnabled(0, isEditable()); tablePart.setButtonEnabled(1, isEditable() && table.getSelection().length > 0); tablePart.setButtonEnabled(2, isEditable() && table.getSelection().length == 1); } private void handleRemove() { IStructuredSelection ssel = (IStructuredSelection) fProvidesTable.getSelection(); if (ssel.size() > 0) { Iterator iter = ssel.iterator(); IDSService service = getDSModel().getDSComponent().getService(); while (iter.hasNext()) { Object object = iter.next(); if (object instanceof IDSProvide) { service.removeProvidedService((IDSProvide) object); } } if (service.getProvidedServices().length == 0) { getDSModel().getDSComponent().removeService(service); } } } private void handleAdd() { doOpenSelectionDialog(IJavaElementSearchConstants.CONSIDER_CLASSES_AND_INTERFACES); } private void doOpenSelectionDialog(int scopeType) { try { String filter = ""; //$NON-NLS-1$ filter = filter.substring(filter.lastIndexOf(".") + 1); //$NON-NLS-1$ SelectionDialog dialog = JavaUI.createTypeDialog(Activator.getActiveWorkbenchShell(), PlatformUI.getWorkbench().getProgressService(), SearchEngine.createWorkspaceScope(), scopeType, true, filter, new DSTypeSelectionExtension(getDSModel())); dialog.setTitle(Messages.DSProvideDetails_selectType); if (dialog.open() == Window.OK) { Object[] result = dialog.getResult(); for (int i = 0; i < result.length; i++) { IType type = (IType) result[i]; String fullyQualifiedName = type.getFullyQualifiedName('$'); addProvide(fullyQualifiedName); } } } catch (CoreException e) { } } private void addProvide(String fullyQualifiedName) { IDSDocumentFactory factory = getDSModel().getFactory(); IDSComponent component = getDSModel().getDSComponent(); IDSService service = component.getService(); if (service == null) { service = factory.createService(); component.setService(service); } IDSProvide provide = factory.createProvide(); // set interface attribute provide.setInterface(fullyQualifiedName); // add provide service.addProvidedService(provide); } public void modelChanged(IModelChangedEvent e) { if (e.getChangeType() == IModelChangedEvent.WORLD_CHANGED) { markStale(); } else if (e.getChangeType() == IModelChangedEvent.REMOVE) { Object[] objects = e.getChangedObjects(); for (int i = 0; i < objects.length; i++) { Table table = fProvidesTable.getTable(); if (objects[i] instanceof IDSProvide) { int index = table.getSelectionIndex(); fProvidesTable.remove(objects[i]); if (canSelect()) { table.setSelection(index < table.getItemCount() ? index : table.getItemCount() - 1); } } } updateButtons(); updateTitle(); } else if (e.getChangeType() == IModelChangedEvent.INSERT) { Object[] objects = e.getChangedObjects(); if (objects.length > 0) { fProvidesTable.refresh(); fProvidesTable.setSelection(new StructuredSelection(objects[objects.length - 1])); } updateButtons(); updateTitle(); } else { fProvidesTable.refresh(); updateButtons(); } } private DSInputContext getDSContext() { InputContextManager manager = getPage().getPDEEditor().getContextManager(); return (DSInputContext) manager.findContext(DSInputContext.CONTEXT_ID); } private IDSModel getDSModel() { DSInputContext context = getDSContext(); return context == null ? null : (IDSModel) context.getModel(); } public boolean doGlobalAction(String actionId) { if (!isEditable()) { return false; } if (actionId.equals(ActionFactory.DELETE.getId())) { handleRemove(); return true; } return false; } protected void selectionChanged(IStructuredSelection selection) { getPage().getPDEEditor().setSelection(selection); updateButtons(); } private void updateTitle() { int itemCount = fProvidesTable.getTable().getItemCount(); getSection().setText(NLS.bind(Messages.DSProvideSection_title, new Integer(itemCount))); } public void doubleClick(DoubleClickEvent event) { IDSProvide provide = (IDSProvide) ((IStructuredSelection) fProvidesTable.getSelection()).getFirstElement(); String value = provide.getInterface(); IProject project = getProject(); try { if (project != null && project.hasNature(JavaCore.NATURE_ID)) { IJavaProject javaProject = JavaCore.create(project); IJavaElement element = javaProject.findType(value.replace('$', '.')); if (element != null) JavaUI.openInEditor(element); } } catch (PartInitException e) { Activator.logException(e); } catch (CoreException e) { Activator.logException(e); } } }