Java 类org.eclipse.ui.swt.IFocusService 实例源码

public void adapt(StyledText styledText) {
    this.styledText = styledText;

    // perform initialization of fake resource context
    updateFakeResourceContext();

    // connect Xtext document to fake resource
    initXtextDocument(getFakeResourceContext());

    // connect xtext document to xtext source viewer
    this.sourceviewer = createXtextSourceViewer();
    this.decorationSupport = createSourceViewerDecorationSupport();
    configureSourceViewerDecorationSupport(getDecorationSupport());

    // install semantic highlighting support
    installHighlightingHelper();

    this.validationJob = createValidationJob();
    getXtextDocument().setValidationJob(getValidationJob());

    styledText.setData(StyledTextXtextAdapter.class.getCanonicalName(), this);

    final IContentAssistant contentAssistant = getXtextSourceviewer().getContentAssistant();
    final CompletionProposalAdapter completionProposalAdapter = new CompletionProposalAdapter(styledText,
            contentAssistant, KeyStroke.getInstance(SWT.CTRL, SWT.SPACE), null);

    if ((styledText.getStyle() & SWT.SINGLE) != 0) {
        // The regular key down event is too late (after popup is closed).
        // when using the StyledText.VerifyKey event (3005), we get the
        // event early enough!
        styledText.addListener(3005, new Listener() {
            public void handleEvent(Event event) {
                if (event.character == SWT.CR && !completionProposalAdapter.isProposalPopupOpen()) {
                    Event selectionEvent = new Event();
                    selectionEvent.type = SWT.DefaultSelection;
                    selectionEvent.widget = event.widget;
                    for (Listener l : event.widget.getListeners(SWT.DefaultSelection)) {
                        l.handleEvent(selectionEvent);
                    }
                }
            }
        });
    }

    // Register focus tracker for evaluating the active focus control in
    // core expression
    IFocusService service = (IFocusService) PlatformUI.getWorkbench().getService(IFocusService.class);
    service.addFocusTracker(styledText, StyledText.class.getCanonicalName());

    // add JDT Style code completion hint decoration
    this.decoration = createContentAssistDecoration(styledText);

    initSelectionProvider();
}

public void adapt(StyledText styledText) {
    this.styledText = styledText;

    // perform initialization of fake resource context
    updateFakeResourceContext();

    // connect Xtext document to fake resource
    initXtextDocument(fakeResourceContext);

    // connect xtext document to xtext source viewer
    createXtextSourceViewer();

    // install semantic highlighting support
    installHighlightingHelper();

    validationJob = createValidationJob();
    document.setValidationJob(validationJob);

    styledText.setData(StyledTextXtextAdapter.class.getCanonicalName(), this);

    final IContentAssistant contentAssistant = sourceviewer.getContentAssistant();
    final CompletionProposalAdapter completionProposalAdapter = new CompletionProposalAdapter(styledText,
            contentAssistant, KeyStroke.getInstance(SWT.CTRL, ' '), null);

    if ((styledText.getStyle() & SWT.SINGLE) != 0) {
        // The regular key down event is too late (after popup is closed).
        // when using the StyledText.VerifyKey event (3005), we get the
        // event early enough!
        styledText.addListener(3005, new Listener() {
            public void handleEvent(Event event) {
                if (event.character == SWT.CR && !completionProposalAdapter.isProposalPopupOpen()) {
                    Event selectionEvent = new Event();
                    selectionEvent.type = SWT.DefaultSelection;
                    selectionEvent.widget = event.widget;
                    for (Listener l : event.widget.getListeners(SWT.DefaultSelection)) {
                        l.handleEvent(selectionEvent);
                    }
                }
            }
        });
    }

    // Register focus tracker for evaluating the active focus control in
    // core expression
    IFocusService service = (IFocusService) PlatformUI.getWorkbench().getService(IFocusService.class);
    service.addFocusTracker(styledText, StyledText.class.getCanonicalName());

    // add JDT Style code completion hint decoration
    createContentAssistDecoration(styledText);

    // FIX for Community Bug #3200:
    // Overriding the SelectionProvider causes the problem, because looking at 
    // XtextStyledTextSelectionProvider#getSelection() the following set of instructions:
    // ...
    //  if (styledText.isDisposed())
    //      return StructuredSelection.EMPTY;
    // ...
    // will end-up losing the selection after closing our Expression Editor.
    //initSelectionProvider();
}