Java tutorial
/** * Copyright (c) 2013 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.fmusim.components.diagram.part; 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.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.transaction.TransactionalEditingDomain; import org.eclipse.emf.workspace.util.WorkspaceSynchronizer; 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.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.jface.dialogs.ErrorDialog; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.window.Window; import org.eclipse.osgi.util.NLS; 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 ac.soton.fmusim.components.diagram.navigator.ComponentsNavigatorItem; /** * @generated */ public class ComponentsDiagramEditor extends DiagramDocumentEditor implements IGotoMarker { /** * @generated */ public static final String ID = "ac.soton.fmusim.components.diagram.part.ComponentsDiagramEditorID"; //$NON-NLS-1$ /** * @generated */ public static final String CONTEXT_ID = "ac.soton.fmusim.components.diagram.ui.diagramContext"; //$NON-NLS-1$ /** * @generated */ public ComponentsDiagramEditor() { super(true); } /** * @generated */ protected String getContextID() { return CONTEXT_ID; } /** * @generated */ protected PaletteRoot createPaletteRoot(PaletteRoot existingPaletteRoot) { PaletteRoot root = super.createPaletteRoot(existingPaletteRoot); new ComponentsPaletteFactory().fillPalette(root); return root; } /** * @generated */ protected PreferencesHint getPreferencesHint() { return ComponentsDiagramEditorPlugin.DIAGRAM_PREFERENCES_HINT; } /** * @generated */ public String getContributorId() { return ComponentsDiagramEditorPlugin.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 ComponentsDiagramEditorPlugin.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(ComponentsDiagramEditorPlugin.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.ComponentsDiagramEditor_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.ComponentsDiagramEditor_SaveAsErrorTitle, Messages.ComponentsDiagramEditor_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.ComponentsDiagramEditor_SaveErrorTitle, Messages.ComponentsDiagramEditor_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) { ComponentsNavigatorItem item = new ComponentsNavigatorItem(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()); } }