content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.gwt.client.ui.history;
  
  import com.google.common.base.Predicate;
  import com.google.gwt.cell.client.ActionCell;
  import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  
  /**
   * Cell class for rendering a button inside a cell table.<p>
   *
   * @param <T> the cell type
   */
  public class CmsButtonCell<T> extends ActionCell<T> {
  
      /** Function to check whether the button should be available. */
      private Predicate<T> m_checkActive;
  
      /** The value for the CSS class of the button. */
      private String m_cssClass;
  
      /** The value for the title attribute of the button. */
      private String m_title;
  
      /**
       * Creates a new instance.<p>
       *
       * @param title the value for the title attribute of the button
       * @param cssClass the value for the CSS class of the button
       * @param delegate the delegate which should be called when the button is clicked
       * @param checkActive a predicate to check whether the button should be active
       */
      public CmsButtonCell(
          String title,
          String cssClass,
          final ActionCell.Delegate<T> delegate,
          final Predicate<T> checkActive) {
  
          super("", new ActionCell.Delegate<T>() {
  
              public void execute(T object) {
  
                  if (checkActive.apply(object)) {
                      delegate.execute(object);
                  }
              }
          });
          m_title = title;
          m_cssClass = cssClass;
          m_checkActive = checkActive;
      }
  
      /**
       * @see com.google.gwt.cell.client.ActionCell#render(com.google.gwt.cell.client.Cell.Context, java.lang.Object, com.google.gwt.safehtml.shared.SafeHtmlBuilder)
       */
      @Override
      public void render(com.google.gwt.cell.client.Cell.Context context, T value, SafeHtmlBuilder sb) {
  
          if (m_checkActive.apply(value)) {
              sb.append(CmsResourceHistoryTable.templates.button(m_title, m_cssClass));
          }
      }
  }
  