eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/CdmViewerContextMenu.java

   1 package eu.etaxonomy.taxeditor.view;
   2
   3 import java.util.HashMap;
   4 import java.util.Map;
   5 import java.util.Map.Entry;
   6 import java.util.UUID;
   7
   8 import org.eclipse.core.commands.Command;
   9 import org.eclipse.core.commands.ParameterizedCommand;
  10 import org.eclipse.core.commands.common.NotDefinedException;
  11 import org.eclipse.jface.action.ContributionItem;
  12 import org.eclipse.jface.action.IContributionItem;
  13 import org.eclipse.jface.viewers.ISelection;
  14 import org.eclipse.jface.viewers.IStructuredSelection;
  15 import org.eclipse.swt.SWT;
  16 import org.eclipse.swt.events.SelectionAdapter;
  17 import org.eclipse.swt.events.SelectionEvent;
  18 import org.eclipse.swt.widgets.Menu;
  19 import org.eclipse.swt.widgets.MenuItem;
  20 import org.eclipse.ui.IWorkbenchWindow;
  21 import org.eclipse.ui.PlatformUI;
  22 import org.eclipse.ui.actions.CompoundContributionItem;
  23 import org.eclipse.ui.commands.ICommandService;
  24 import org.eclipse.ui.handlers.IHandlerService;
  25
  26 import eu.etaxonomy.cdm.model.common.ICdmBase;
  27 import eu.etaxonomy.taxeditor.Messages;
  28 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  29
  30 /**
  31  * Generic context menu for opening elements in the taxeditor.
  32  *
  33  */
  34 public class CdmViewerContextMenu extends CompoundContributionItem {
  35
  36     @Override
  37     protected IContributionItem[] getContributionItems() {
  38         IContributionItem[] contributionItems = new IContributionItem[] {
  39                 new ContributionItem() {
  40                     @Override
  41                     public void fill(Menu menu, int index) {
  42                         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  43                         final ISelection selection = window.getActivePage().getSelection();
  44                         if(selection instanceof IStructuredSelection){
  45                             Object firstElement = ((IStructuredSelection) selection).getFirstElement();
  46                             Map<String, String> availableViewers = CdmViewerUtil.getAvailableViewers(firstElement);
  47                             Map<Command, String> enabledCommands = getEnabledCommands(availableViewers);
  48
  49                             //check if only one or multiple viewers/commands are available
  50                             if(enabledCommands.size()==1){
  51                                 Entry<Command, String> entry = enabledCommands.entrySet().iterator().next();
  52                                 final Command command = entry.getKey();
  53                                 String viewerName = entry.getValue();
  54
  55                                 MenuItem addItem = new MenuItem(menu, SWT.CASCADE);
  56                                 addItem.setText(String.format(Messages.CdmViewerContextMenu_OPEN, viewerName));
  57                                 addItem.addSelectionListener(new CommandInvoker(command, firstElement)) ;
  58                             }
  59                             else if(enabledCommands.size()>1){
  60                                 MenuItem addItem = new MenuItem(menu, SWT.CASCADE);
  61                                 addItem.setText(Messages.CdmViewerContextMenu_OPEN_IN);
  62                                 Menu addMenu = new Menu(menu);
  63                                 addItem.setMenu(addMenu);
  64                                 for(Entry<Command, String> entry:enabledCommands.entrySet()){
  65                                     final Command command = entry.getKey();
  66                                     String viewerName = entry.getValue();
  67
  68                                     MenuItem menuItem = new MenuItem(addMenu, SWT.NONE);
  69                                     menuItem.setText(viewerName);
  70                                     menuItem.addSelectionListener(new CommandInvoker(command, firstElement)) ;
  71                                 }
  72                             }
  73                         }
  74                     }
  75
  76                 }
  77         };
  78         return contributionItems;
  79     }
  80
  81     private Map<Command, String> getEnabledCommands(Map<String, String> availableViewers) {
  82         Map<Command, String> enabledCommands = new HashMap<Command, String>();
  83         for(Entry<String, String> entry:availableViewers.entrySet()){
  84             final String commandId = entry.getKey();
  85             ICommandService commandService = (ICommandService)PlatformUI.getWorkbench().getService(ICommandService.class);
  86             Command command = commandService.getCommand(commandId);
  87             if(command.isEnabled()){
  88                 enabledCommands.put(command, entry.getValue());
  89             }
  90         }
  91         return enabledCommands;
  92     }
  93
  94     private final class CommandInvoker extends SelectionAdapter {
  95         private final Command command;
  96         private final Object selectedObject;
  97
  98         private CommandInvoker(Command command, Object selectedObject) {
  99             this.command = command;
 100             this.selectedObject = selectedObject;
 101         }
 102
 103         @Override
 104         public void widgetSelected(SelectionEvent e) {
 105             IHandlerService handlerService = (IHandlerService)PlatformUI.getWorkbench().getService(IHandlerService.class);
 106             Map<String, UUID> params = new HashMap<String, UUID>();
 107             if(selectedObject instanceof ICdmBase){
 108                 params.put(command.getId()+".uuid", ((ICdmBase) selectedObject).getUuid()); //$NON-NLS-1$
 109             }
 110             ParameterizedCommand parameterizedCommand = ParameterizedCommand.generateCommand(command, params);
 111             try {
 112                 if(parameterizedCommand!=null){
 113                     handlerService.executeCommand(parameterizedCommand, null);
 114                 }
 115                 else{
 116                     handlerService.executeCommand(command.getId(), null);
 117                 }
 118             } catch (NotDefinedException nde) {
 119                 throw new RuntimeException("Could not find open command: " + command.getId()); //$NON-NLS-1$
 120             } catch (Exception exception) {
 121                 MessagingUtils.error(getClass(), "An exception occured while trying execute "+command.getId(), exception); //$NON-NLS-1$
 122             }
 123             PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getSelection();
 124         }
 125     }
 126
 127 }