/** Update enabling and labels according to the current status of the operation history. */
  public void update() {
    if (isInvalid()) {
      return;
    }

    boolean enabled = shouldBeEnabled();
    String text, tooltipText;
    if (enabled) {
      tooltipText = NLS.bind(getTooltipString(), getOperation().getLabel());
      text =
          NLS.bind(
                  getCommandString(),
                  LegacyActionTools.escapeMnemonics(shortenText(getOperation().getLabel())))
              + '@';
    } else {
      tooltipText =
          NLS.bind(WorkbenchMessages.Operations_undoRedoCommandDisabled, getSimpleTooltipString());
      text = getSimpleCommandString();
      /*
       * if there is nothing to do and we are pruning the history, flush
       * the history of this context.
       */
      if (undoContext != null && pruning) {
        flush();
      }
    }
    setText(text);
    setToolTipText(tooltipText);
    setEnabled(enabled);
  }
Esempio n. 2
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  @Override
  public void updateLabel() {
    ISearchResultPage page = getActivePage();
    String label = ""; // $NON-NLS-1$
    if (page != null) {
      label = LegacyActionTools.escapeMnemonics(page.getLabel());
    }
    if (!fPageContent.isDisposed()) {
      if (label.length() == 0) {
        if (fDescriptionComposite != null) {
          fDescriptionComposite.dispose();
          fDescriptionComposite = null;
          fPageContent.layout();
        }
      } else {
        if (fDescriptionComposite == null) {
          fDescriptionComposite = new Composite(fPageContent, SWT.NONE);
          fDescriptionComposite.moveAbove(null);

          GridLayout layout = new GridLayout();
          layout.marginHeight = 0;
          layout.marginWidth = 0;
          layout.verticalSpacing = 0;
          fDescriptionComposite.setLayout(layout);
          fDescriptionComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));

          fDescription = new Link(fDescriptionComposite, SWT.NONE);
          GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);
          gridData.horizontalIndent = 5;
          fDescription.setLayoutData(gridData);
          fDescription.setText(label);

          Label separator = new Label(fDescriptionComposite, SWT.SEPARATOR | SWT.HORIZONTAL);
          separator.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
          fPageContent.layout();
        } else {
          fDescription.setText(label);
        }
      }
    }
  }
 /**
  * Escapes '&' with '&' in the given text.
  *
  * @param text the text to escape, can be <code>null</code>
  * @return the escaped string or <code>null</code> if text was <code>null</code>
  * @since 3.4
  */
 private String escape(String text) {
   if (text == null) return text;
   return LegacyActionTools.escapeMnemonics(text);
 }
  /**
   * Informs the user about the fact that there are no enabled categories in the default content
   * assist set and shows a link to the preferences.
   *
   * @return <code>true</code> if the default should be restored
   * @since 3.3
   */
  private boolean informUserAboutEmptyDefaultCategory() {
    if (OptionalMessageDialog.isDialogEnabled(PREF_WARN_ABOUT_EMPTY_ASSIST_CATEGORY)) {
      final Shell shell = JavaPlugin.getActiveWorkbenchShell();
      String title = JavaTextMessages.ContentAssistProcessor_all_disabled_title;
      String message = JavaTextMessages.ContentAssistProcessor_all_disabled_message;
      // see PreferencePage#createControl for the 'defaults' label
      final String restoreButtonLabel = JFaceResources.getString("defaults"); // $NON-NLS-1$
      final String linkMessage =
          Messages.format(
              JavaTextMessages.ContentAssistProcessor_all_disabled_preference_link,
              LegacyActionTools.removeMnemonics(restoreButtonLabel));
      final int restoreId = IDialogConstants.CLIENT_ID + 10;
      final int settingsId = IDialogConstants.CLIENT_ID + 11;
      final OptionalMessageDialog dialog =
          new OptionalMessageDialog(
              PREF_WARN_ABOUT_EMPTY_ASSIST_CATEGORY,
              shell,
              title,
              null /* default image */,
              message,
              MessageDialog.WARNING,
              new String[] {restoreButtonLabel, IDialogConstants.CLOSE_LABEL},
              1) {
            /*
             * @see org.eclipse.jdt.internal.ui.dialogs.OptionalMessageDialog#createCustomArea(org.eclipse.swt.widgets.Composite)
             */
            @Override
            protected Control createCustomArea(Composite composite) {
              // wrap link and checkbox in one composite without space
              Composite parent = new Composite(composite, SWT.NONE);
              GridLayout layout = new GridLayout();
              layout.marginHeight = 0;
              layout.marginWidth = 0;
              layout.verticalSpacing = 0;
              parent.setLayout(layout);

              Composite linkComposite = new Composite(parent, SWT.NONE);
              layout = new GridLayout();
              layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
              layout.marginWidth =
                  convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
              layout.horizontalSpacing =
                  convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
              linkComposite.setLayout(layout);

              Link link = new Link(linkComposite, SWT.NONE);
              link.setText(linkMessage);
              link.addSelectionListener(
                  new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                      setReturnCode(settingsId);
                      close();
                    }
                  });
              GridData gridData = new GridData(SWT.FILL, SWT.BEGINNING, true, false);
              gridData.widthHint = this.getMinimumMessageWidth();
              link.setLayoutData(gridData);

              // create checkbox and "don't show this message" prompt
              super.createCustomArea(parent);

              return parent;
            }

            /*
             * @see org.eclipse.jface.dialogs.MessageDialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
             */
            @Override
            protected void createButtonsForButtonBar(Composite parent) {
              Button[] buttons = new Button[2];
              buttons[0] = createButton(parent, restoreId, restoreButtonLabel, false);
              buttons[1] =
                  createButton(
                      parent, IDialogConstants.CLOSE_ID, IDialogConstants.CLOSE_LABEL, true);
              setButtons(buttons);
            }
          };
      int returnValue = dialog.open();
      if (restoreId == returnValue || settingsId == returnValue) {
        if (restoreId == returnValue) {
          IPreferenceStore store = JavaPlugin.getDefault().getPreferenceStore();
          store.setToDefault(PreferenceConstants.CODEASSIST_CATEGORY_ORDER);
          store.setToDefault(PreferenceConstants.CODEASSIST_EXCLUDED_CATEGORIES);
        }
        if (settingsId == returnValue)
          PreferencesUtil.createPreferenceDialogOn(
                  shell, "org.eclipse.jdt.ui.preferences.CodeAssistPreferenceAdvanced", null, null)
              .open(); //$NON-NLS-1$
        fComputerRegistry.reload();
        return true;
      }
    }
    return false;
  }