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.input;
  
  import org.opencms.gwt.client.util.CmsDomUtil;
  import org.opencms.gwt.client.util.CmsTextMetrics;
  import org.opencms.util.CmsStringUtil;
  
  import com.google.gwt.dom.client.Element;
  
  /**
   * Single line label implementation that acts like doing CSS 'text-overflow:ellipsis;', but cutting text on the left-hand side.<p>
   *
   * @since 8.0.0
   */
  public class CmsLabelLeftTruncating extends CmsLabel {
  
      /**
       * Creates an empty label.<p>
       */
      public CmsLabelLeftTruncating() {
  
          super();
      }
  
      /**
       * Creates an empty label using the given element.<p>
       *
       * @param element the element to use
       */
      public CmsLabelLeftTruncating(Element element) {
  
          super(element);
      }
  
      /**
       * Creates a label with the specified text.<p>
       *
       * @param text the new label's text
       */
      public CmsLabelLeftTruncating(String text) {
  
          super(text);
      }
  
      /**
       * @see org.opencms.gwt.client.ui.I_CmsTruncable#truncate(java.lang.String, int)
       */
      @Override
      public void truncate(String textMetricsKey, int labelWidth) {
  
          super.setText(m_originalText);
  
          // measure the actual text width
          Element element = getElement();
          CmsTextMetrics tm = CmsTextMetrics.get(element, textMetricsKey);
          String text = element.getInnerText();
          int textWidth = tm.getWidth(text);
          tm.release();
  
          if (labelWidth >= textWidth) {
              updateTitle(false);
              return;
          }
          updateTitle(true);
  
          text = (new StringBuilder(text)).reverse().toString();
          // if the text does not have enough space, fix it
          int maxChars = (int)(((float)labelWidth / (float)textWidth) * text.length());
          if (maxChars < 1) {
              maxChars = 1;
          }
          text = text.substring(0, maxChars - 1);
          if (CmsStringUtil.isEmptyOrWhitespaceOnly(text)) {
              // if empty, it could break the layout
              text = CmsDomUtil.Entity.nbsp.html();
          }
          // text = CmsClientStringUtil.shortenString(text, maxChars);
          text = (new StringBuilder(text)).reverse().toString();
          if (maxChars > 2) {
              // enough space for ellipsis?
              text = CmsDomUtil.Entity.hellip.html() + text;
          }
          // use html instead of text because of the entities
          setHTML(text);
      }
  
  }
  