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package eu.etaxonomy.taxeditor.view;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.UUID;
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import org.eclipse.core.commands.Command;
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import org.eclipse.core.commands.ParameterizedCommand;
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import org.eclipse.core.commands.common.NotDefinedException;
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import org.eclipse.jface.action.ContributionItem;
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import org.eclipse.jface.action.IContributionItem;
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import org.eclipse.jface.viewers.ISelection;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.jface.viewers.TreeNode;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.events.SelectionAdapter;
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import org.eclipse.swt.events.SelectionEvent;
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import org.eclipse.swt.widgets.Menu;
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import org.eclipse.swt.widgets.MenuItem;
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import org.eclipse.ui.IWorkbenchPage;
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import org.eclipse.ui.IWorkbenchWindow;
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import org.eclipse.ui.PlatformUI;
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import org.eclipse.ui.actions.CompoundContributionItem;
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import org.eclipse.ui.handlers.IHandlerService;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.ICdmBase;
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import eu.etaxonomy.cdm.model.taxon.TaxonNode;
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import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;
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import eu.etaxonomy.taxeditor.l10n.Messages;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.store.CdmStore;
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/**
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* Generic context menu for opening elements in the taxeditor.
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*
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*/
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public class CdmViewerContextMenu extends CompoundContributionItem {
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@Override
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protected IContributionItem[] getContributionItems() {
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IContributionItem[] contributionItems = new IContributionItem[] {
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new ContributionItem() {
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@Override
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public void fill(Menu menu, int index) {
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final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
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IWorkbenchPage activePage = window.getActivePage();
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if(activePage!=null){
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final ISelection selection = activePage.getSelection();
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if(selection instanceof IStructuredSelection){
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Object firstElement = ((IStructuredSelection) selection).getFirstElement();
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if (firstElement instanceof TaxonNode && !((TaxonNode)firstElement).hasTaxon()){
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firstElement = ((TaxonNode)firstElement).getClassification();
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}
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Map<Command, String> enabledCommands = CdmViewerUtil.getAvailableViewers(firstElement);
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//check if only one or multiple viewers/commands are available
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if(enabledCommands.size()==1){
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Entry<Command, String> entry = enabledCommands.entrySet().iterator().next();
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final Command command = entry.getKey();
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String viewerName = entry.getValue();
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MenuItem addItem = new MenuItem(menu, SWT.CASCADE);
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addItem.setText(String.format(Messages.CdmViewerContextMenu_OPEN, viewerName));
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addItem.addSelectionListener(new CommandInvoker(command, firstElement)) ;
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}
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else if(enabledCommands.size()>1){
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MenuItem addItem = new MenuItem(menu, SWT.CASCADE);
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addItem.setText(Messages.CdmViewerContextMenu_OPEN_IN);
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Menu addMenu = new Menu(menu);
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addItem.setMenu(addMenu);
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for(Entry<Command, String> entry:enabledCommands.entrySet()){
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final Command command = entry.getKey();
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String viewerName = entry.getValue();
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MenuItem menuItem = new MenuItem(addMenu, SWT.NONE);
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menuItem.setText(viewerName);
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menuItem.addSelectionListener(new CommandInvoker(command, firstElement)) ;
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}
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}
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}
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}
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}
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}
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};
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return contributionItems;
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}
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private final class CommandInvoker extends SelectionAdapter {
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private final Command command;
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private Object selectedObject;
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private CommandInvoker(Command command, Object selectedObject) {
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this.command = command;
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this.selectedObject = selectedObject;
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}
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@Override
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public void widgetSelected(SelectionEvent e) {
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IHandlerService handlerService = PlatformUI.getWorkbench().getService(IHandlerService.class);
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Map<String, UUID> params = new HashMap<String, UUID>();
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//for generic UuidAndTitleCache objects try to load the object
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if (selectedObject instanceof UuidAndTitleCache){
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selectedObject = CdmStore.getCommonService().find(CdmBase.class, ((UuidAndTitleCache)selectedObject).getUuid());
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}
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//for tree nodes get the value resp. the object of the node
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else if (selectedObject instanceof TreeNode){
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selectedObject = ((TreeNode) selectedObject).getValue();
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}
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if (selectedObject instanceof TaxonNode && !((TaxonNode)selectedObject).hasTaxon()){
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selectedObject = ((TaxonNode)selectedObject).getClassification();
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}
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if(selectedObject instanceof ICdmBase){
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params.put(command.getId()+".uuid", ((ICdmBase) selectedObject).getUuid()); //$NON-NLS-1$
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}
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ParameterizedCommand parameterizedCommand = ParameterizedCommand.generateCommand(command, params);
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try {
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if(parameterizedCommand!=null){
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handlerService.executeCommand(parameterizedCommand, null);
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}
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else{
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handlerService.executeCommand(command.getId(), null);
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}
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} catch (NotDefinedException nde) {
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throw new RuntimeException("Could not find open command: " + command.getId()); //$NON-NLS-1$
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} catch (Exception exception) {
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MessagingUtils.error(getClass(), "An exception occured while trying to execute "+command.getId(), exception); //$NON-NLS-1$
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}
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}
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}
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}
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