Java tutorial
/* * Copyright (c) 2014 University of Southampton. * 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 */ package ac.soton.multisim.diagram.part; import java.util.ArrayList; import java.util.Collections; import java.util.HashSet; import java.util.List; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IMarker; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IAdaptable; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.emf.common.ui.URIEditorInput; import org.eclipse.emf.common.util.URI; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.ecore.util.EcoreUtil; import org.eclipse.emf.transaction.TransactionalEditingDomain; import org.eclipse.emf.workspace.util.WorkspaceSynchronizer; import org.eclipse.gef.EditPartViewer; import org.eclipse.gef.palette.PaletteRoot; import org.eclipse.gmf.runtime.common.ui.services.marker.MarkerNavigationService; import org.eclipse.gmf.runtime.diagram.core.preferences.PreferencesHint; import org.eclipse.gmf.runtime.diagram.ui.actions.ActionIds; import org.eclipse.gmf.runtime.diagram.ui.parts.DiagramDropTargetListener; import org.eclipse.gmf.runtime.diagram.ui.resources.editor.document.IDiagramDocument; import org.eclipse.gmf.runtime.diagram.ui.resources.editor.document.IDocument; import org.eclipse.gmf.runtime.diagram.ui.resources.editor.document.IDocumentProvider; import org.eclipse.gmf.runtime.diagram.ui.resources.editor.parts.DiagramDocumentEditor; import org.eclipse.gmf.runtime.notation.Diagram; import org.eclipse.gmf.runtime.notation.View; import org.eclipse.jface.dialogs.ErrorDialog; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.util.LocalSelectionTransfer; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.window.Window; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.dnd.FileTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.dnd.TransferData; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IEditorMatchingStrategy; import org.eclipse.ui.IEditorReference; import org.eclipse.ui.IFileEditorInput; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.dialogs.SaveAsDialog; import org.eclipse.ui.ide.IGotoMarker; import org.eclipse.ui.navigator.resources.ProjectExplorer; import org.eclipse.ui.part.FileEditorInput; import org.eclipse.ui.part.IShowInTargetList; import org.eclipse.ui.part.ShowInContext; import org.eventb.core.IMachineRoot; import ac.soton.multisim.Component; import ac.soton.multisim.ComponentDiagram; import ac.soton.multisim.diagram.navigator.MultisimNavigatorItem; import ac.soton.multisim.util.FMUResource; /** * @generated */ public class MultisimDiagramEditor extends DiagramDocumentEditor implements IGotoMarker { /** * @generated */ public static final String ID = "ac.soton.multisim.diagram.part.MultisimDiagramEditorID"; //$NON-NLS-1$ /** * @generated */ public static final String CONTEXT_ID = "ac.soton.multisim.diagram.ui.diagramContext"; //$NON-NLS-1$ /** * @generated */ public MultisimDiagramEditor() { super(true); } /** * @generated */ protected String getContextID() { return CONTEXT_ID; } /** * @generated */ protected PaletteRoot createPaletteRoot(PaletteRoot existingPaletteRoot) { PaletteRoot root = super.createPaletteRoot(existingPaletteRoot); new MultisimPaletteFactory().fillPalette(root); return root; } /** * @generated */ protected PreferencesHint getPreferencesHint() { return MultisimDiagramEditorPlugin.DIAGRAM_PREFERENCES_HINT; } /** * @generated */ public String getContributorId() { return MultisimDiagramEditorPlugin.ID; } /** * @generated */ @SuppressWarnings("rawtypes") public Object getAdapter(Class type) { if (type == IShowInTargetList.class) { return new IShowInTargetList() { public String[] getShowInTargetIds() { return new String[] { ProjectExplorer.VIEW_ID }; } }; } return super.getAdapter(type); } /** * @generated */ protected IDocumentProvider getDocumentProvider(IEditorInput input) { if (input instanceof IFileEditorInput || input instanceof URIEditorInput) { return MultisimDiagramEditorPlugin.getInstance().getDocumentProvider(); } return super.getDocumentProvider(input); } /** * @generated */ public TransactionalEditingDomain getEditingDomain() { IDocument document = getEditorInput() != null ? getDocumentProvider().getDocument(getEditorInput()) : null; if (document instanceof IDiagramDocument) { return ((IDiagramDocument) document).getEditingDomain(); } return super.getEditingDomain(); } /** * @generated */ protected void setDocumentProvider(IEditorInput input) { if (input instanceof IFileEditorInput || input instanceof URIEditorInput) { setDocumentProvider(MultisimDiagramEditorPlugin.getInstance().getDocumentProvider()); } else { super.setDocumentProvider(input); } } /** * @generated */ public void gotoMarker(IMarker marker) { MarkerNavigationService.getInstance().gotoMarker(this, marker); } /** * @generated */ public boolean isSaveAsAllowed() { return true; } /** * @generated */ public void doSaveAs() { performSaveAs(new NullProgressMonitor()); } /** * @generated */ protected void performSaveAs(IProgressMonitor progressMonitor) { Shell shell = getSite().getShell(); IEditorInput input = getEditorInput(); SaveAsDialog dialog = new SaveAsDialog(shell); IFile original = input instanceof IFileEditorInput ? ((IFileEditorInput) input).getFile() : null; if (original != null) { dialog.setOriginalFile(original); } dialog.create(); IDocumentProvider provider = getDocumentProvider(); if (provider == null) { // editor has been programmatically closed while the dialog was open return; } if (provider.isDeleted(input) && original != null) { String message = NLS.bind(Messages.MultisimDiagramEditor_SavingDeletedFile, original.getName()); dialog.setErrorMessage(null); dialog.setMessage(message, IMessageProvider.WARNING); } if (dialog.open() == Window.CANCEL) { if (progressMonitor != null) { progressMonitor.setCanceled(true); } return; } IPath filePath = dialog.getResult(); if (filePath == null) { if (progressMonitor != null) { progressMonitor.setCanceled(true); } return; } IWorkspaceRoot workspaceRoot = ResourcesPlugin.getWorkspace().getRoot(); IFile file = workspaceRoot.getFile(filePath); final IEditorInput newInput = new FileEditorInput(file); // Check if the editor is already open IEditorMatchingStrategy matchingStrategy = getEditorDescriptor().getEditorMatchingStrategy(); IEditorReference[] editorRefs = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage() .getEditorReferences(); for (int i = 0; i < editorRefs.length; i++) { if (matchingStrategy.matches(editorRefs[i], newInput)) { MessageDialog.openWarning(shell, Messages.MultisimDiagramEditor_SaveAsErrorTitle, Messages.MultisimDiagramEditor_SaveAsErrorMessage); return; } } boolean success = false; try { provider.aboutToChange(newInput); getDocumentProvider(newInput).saveDocument(progressMonitor, newInput, getDocumentProvider().getDocument(getEditorInput()), true); success = true; } catch (CoreException x) { IStatus status = x.getStatus(); if (status == null || status.getSeverity() != IStatus.CANCEL) { ErrorDialog.openError(shell, Messages.MultisimDiagramEditor_SaveErrorTitle, Messages.MultisimDiagramEditor_SaveErrorMessage, x.getStatus()); } } finally { provider.changed(newInput); if (success) { setInput(newInput); } } if (progressMonitor != null) { progressMonitor.setCanceled(!success); } } /** * @generated */ public ShowInContext getShowInContext() { return new ShowInContext(getEditorInput(), getNavigatorSelection()); } /** * @generated */ private ISelection getNavigatorSelection() { IDiagramDocument document = getDiagramDocument(); if (document == null) { return StructuredSelection.EMPTY; } Diagram diagram = document.getDiagram(); if (diagram == null || diagram.eResource() == null) { return StructuredSelection.EMPTY; } IFile file = WorkspaceSynchronizer.getFile(diagram.eResource()); if (file != null) { MultisimNavigatorItem item = new MultisimNavigatorItem(diagram, file, false); return new StructuredSelection(item); } return StructuredSelection.EMPTY; } /** * @generated */ protected void configureGraphicalViewer() { super.configureGraphicalViewer(); DiagramEditorContextMenuProvider provider = new DiagramEditorContextMenuProvider(this, getDiagramGraphicalViewer()); getDiagramGraphicalViewer().setContextMenu(provider); getSite().registerContextMenu(ActionIds.DIAGRAM_EDITOR_CONTEXT_MENU, provider, getDiagramGraphicalViewer()); } /* * Registers drop target listener for drag'n'drop components from explorer to the diagram. * @custom */ @Override protected void initializeGraphicalViewer() { super.initializeGraphicalViewer(); // workspace element drag listener getDiagramGraphicalViewer().addDropTargetListener( new DropTargetListener(getDiagramGraphicalViewer(), LocalSelectionTransfer.getTransfer()) { protected Object getJavaObject(TransferData data) { return LocalSelectionTransfer.getTransfer().getSelection(); } }); // file drag listener getDiagramGraphicalViewer().addDropTargetListener( new DropTargetListener(getDiagramGraphicalViewer(), FileTransfer.getInstance()) { protected Object getJavaObject(TransferData data) { return ((FileTransfer) getTransfer()).nativeToJava(data); } }); // populate the palette with existing components PaletteRoot paletteRoot = getDiagramGraphicalViewer().getEditDomain().getPaletteViewer().getPaletteRoot(); ComponentDiagram diagram = (ComponentDiagram) getDiagramEditPart().resolveSemanticElement(); for (Component component : diagram.getComponents()) { MultisimPaletteFactory.addToPalette(paletteRoot, component); } } /** * Drag'n'drop drop target listener. * @author vitaly * @custom */ private abstract class DropTargetListener extends DiagramDropTargetListener { //XXX: this is not flexible private static final String FMU_EXTENSION = "fmu"; public DropTargetListener(EditPartViewer viewer, Transfer xfer) { super(viewer, xfer); } protected List<?> getObjectsBeingDropped() { TransferData data = getCurrentEvent().currentDataType; HashSet<URI> uris = new HashSet<URI>(); Object transferedObject = getJavaObject(data); if (transferedObject instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) transferedObject; //XXX skip multiple selection if (selection.size() > 1) return null; Object selectedObject = selection.getFirstElement(); if (selectedObject instanceof FMUResource) { return selection.toList(); } else if (selectedObject instanceof IMachineRoot) { return selection.toList(); } else if (selectedObject instanceof MultisimNavigatorItem) { View view = ((MultisimNavigatorItem) selectedObject).getView(); selectedObject = view.getElement(); } else if (selectedObject instanceof IAdaptable) { IAdaptable adaptable = (IAdaptable) selectedObject; selectedObject = adaptable.getAdapter(EObject.class); } if (selectedObject instanceof Component) { EObject modelElement = (EObject) selectedObject; uris.add(EcoreUtil.getURI(modelElement)); } } else if (transferedObject instanceof String[]) { String[] paths = (String[]) transferedObject; if (paths.length == 1 && paths[0].endsWith("." + FMU_EXTENSION)) { return Collections.singletonList(new FMUResource(paths[0])); } } ArrayList<EObject> result = new ArrayList<EObject>(uris.size()); for (URI nextURI : uris) { EObject modelObject = getEditingDomain().getResourceSet().getEObject(nextURI, true); result.add(modelObject); } return result; } protected abstract Object getJavaObject(TransferData data); } }