Package org.eclipse.ui.internal.dialogs

Source Code of org.eclipse.ui.internal.dialogs.PropertyDialog

/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
*     IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.dialogs;

import java.util.Iterator;

import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.preference.PreferenceManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.IWorkbenchHelpContextIds;
import org.eclipse.ui.internal.WorkbenchMessages;
import org.eclipse.ui.internal.util.Util;
import org.eclipse.ui.model.IWorkbenchAdapter;

/**
* This dialog is created and shown when 'Properties' action is performed while
* an object is selected. It shows one or more pages registered for object's
* type.
*/
public class PropertyDialog extends FilteredPreferenceDialog {
  private ISelection selection;

  // The id of the last page that was selected
  private static String lastPropertyId = null;

  /**
   * Create a new property dialog.
   *
   * @param shell
   *            the parent shell
   * @param propertyPageId
   *            the property page id
   * @param element
   *            the adaptable element
   * @return the property dialog
   */
  public static PropertyDialog createDialogOn(Shell shell,
      final String propertyPageId, Object element) {

    PropertyPageManager pageManager = new PropertyPageManager();
    String title = "";//$NON-NLS-1$

    if (element == null) {
      return null;
    }
    // load pages for the selection
    // fill the manager with contributions from the matching contributors
    PropertyPageContributorManager.getManager().contribute(pageManager,
        element);
    // testing if there are pages in the manager
    Iterator pages = pageManager.getElements(PreferenceManager.PRE_ORDER)
        .iterator();
    String name = getName(element);
    if (!pages.hasNext()) {
      MessageDialog.openInformation(shell,
          WorkbenchMessages.PropertyDialog_messageTitle, NLS.bind(
              WorkbenchMessages.PropertyDialog_noPropertyMessage,
              name));
      return null;
    }
    title = NLS
        .bind(WorkbenchMessages.PropertyDialog_propertyMessage, name);
    PropertyDialog propertyDialog = new PropertyDialog(shell, pageManager,
        new StructuredSelection(element));

    if (propertyPageId != null) {
      propertyDialog.setSelectedNode(propertyPageId);
    }
    propertyDialog.create();

    propertyDialog.getShell().setText(title);
    PlatformUI.getWorkbench().getHelpSystem().setHelp(
        propertyDialog.getShell(),
        IWorkbenchHelpContextIds.PROPERTY_DIALOG);

    return propertyDialog;

  }

  /**
   * Returns the name of the given element.
   *
   * @param element
   *            the element
   * @return the name of the element
   */
  private static String getName(Object element) {
    IWorkbenchAdapter adapter = (IWorkbenchAdapter)Util.getAdapter(element, IWorkbenchAdapter.class);
    if (adapter != null) {
      return adapter.getLabel(element);
    }
    return "";//$NON-NLS-1$
  }

  /**
   * Create an instance of the receiver.
   *
   * @param parentShell
   * @param mng
   * @param selection
   */
  public PropertyDialog(Shell parentShell, PreferenceManager mng,
      ISelection selection) {
    super(parentShell, mng);
    setSelection(selection);
  }

  /**
   * Returns selection in the "Properties" action context.
   *
   * @return the selection
   */
  public ISelection getSelection() {
    return selection;
  }

  /**
   * Sets the selection that will be used to determine target object.
   *
   * @param newSelection
   *            the new selection
   */
  public void setSelection(ISelection newSelection) {
    selection = newSelection;
  }

  /**
   * Get the name of the selected item preference
   */
  protected String getSelectedNodePreference() {
    return lastPropertyId;
  }

  /**
   * Get the name of the selected item preference
   */
  protected void setSelectedNodePreference(String pageId) {
    lastPropertyId = pageId;
  }

}
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