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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.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.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.commands.ICommandService;
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import org.eclipse.ui.handlers.IHandlerService;
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import eu.etaxonomy.cdm.model.common.ICdmBase;
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import eu.etaxonomy.taxeditor.Messages;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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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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final ISelection selection = window.getActivePage().getSelection();
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if(selection instanceof IStructuredSelection){
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Object firstElement = ((IStructuredSelection) selection).getFirstElement();
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Map<String, String> availableViewers = CdmViewerUtil.getAvailableViewers(firstElement);
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Map<Command, String> enabledCommands = getEnabledCommands(availableViewers);
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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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return contributionItems;
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}
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private Map<Command, String> getEnabledCommands(Map<String, String> availableViewers) {
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Map<Command, String> enabledCommands = new HashMap<Command, String>();
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for(Entry<String, String> entry:availableViewers.entrySet()){
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final String commandId = entry.getKey();
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ICommandService commandService = (ICommandService)PlatformUI.getWorkbench().getService(ICommandService.class);
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Command command = commandService.getCommand(commandId);
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if(command.isEnabled()){
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enabledCommands.put(command, entry.getValue());
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}
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}
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return enabledCommands;
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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 final 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 = (IHandlerService)PlatformUI.getWorkbench().getService(IHandlerService.class);
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Map<String, UUID> params = new HashMap<String, UUID>();
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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 execute "+command.getId(), exception); //$NON-NLS-1$
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}
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PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getSelection();
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}
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}
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}
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