gt:         if (requiresLink) {
context: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (http://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: http://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: http://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.ade.galleries.client.preview.ui;
  
  import org.opencms.ade.galleries.client.Messages;
  import org.opencms.ade.galleries.client.preview.CmsImagePreviewHandler.Attribute;
  import org.opencms.ade.galleries.client.ui.css.I_CmsLayoutBundle;
  import org.opencms.ade.galleries.shared.CmsImageInfoBean;
  import org.opencms.gwt.client.CmsCoreProvider;
  import org.opencms.gwt.client.ui.I_CmsButton.Size;
  import org.opencms.gwt.client.ui.input.CmsSelectBox;
  import org.opencms.gwt.client.ui.input.CmsTextBox;
  import org.opencms.gwt.client.ui.input.CmsVfsLinkWidget;
  import org.opencms.gwt.client.ui.input.I_CmsFormWidget;
  import org.opencms.gwt.client.util.CmsJSONMap;
  import org.opencms.gwt.client.util.I_CmsSimpleCallback;
  import org.opencms.util.CmsStringUtil;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import com.google.gwt.core.client.GWT;
  import com.google.gwt.uibinder.client.UiBinder;
  import com.google.gwt.uibinder.client.UiField;
  import com.google.gwt.user.client.ui.Composite;
  import com.google.gwt.user.client.ui.Label;
  import com.google.gwt.user.client.ui.Widget;
  
  /**
   * Advanced image tag properties form, use in editor mode only.<p>
   *
   * @since 8.0.
   */
  public class CmsImageAdvancedForm extends Composite {
  
      /** The ui binder interface. */
      interface I_CmsImageAdvancedFormUiBinder extends UiBinder<Widget, CmsImageAdvancedForm> {
          // GWT interface, nothing to do
      }
  
      /** Ui binder instance. */
      private static I_CmsImageAdvancedFormUiBinder m_uiBinder = GWT.create(I_CmsImageAdvancedFormUiBinder.class);
  
      /** Description input field. */
      @UiField
      protected CmsTextBox m_inputDescription;
  
      /** Id input field. */
      @UiField
      protected CmsTextBox m_inputId;
  
      /** Language code input field. */
      @UiField
      protected CmsTextBox m_inputLanguageCode;
  
      /** Style input field. */
      @UiField
      protected CmsTextBox m_inputStyle;
  
      /** Style classes input field. */
      @UiField
      protected CmsTextBox m_inputStyleClasses;
  
      /** URL input field. */
      @UiField
      protected CmsVfsLinkWidget m_inputUrl;
  
      /** Description field label. */
      @UiField
      protected Label m_labelDescription;
  
      /** Id field label. */
      @UiField
      protected Label m_labelId;
  
      /** Language code field label. */
      @UiField
      protected Label m_labelLanguageCode;
  
      /** Set link checkbox label. */
      @UiField
      protected Label m_labelSetLink;
  
      /** Style field label. */
      @UiField
      protected Label m_labelStyle;
  
      /** Style classes field label. */
      @UiField
      protected Label m_labelStyleClasses;
  
      /** Additional attributes label. */
      @UiField
      protected Label m_labelTagAttributes;
  
      /** Target field label. */
      @UiField
      protected Label m_labelTarget;
  
      /** Language direction field label. */
      @UiField
      protected Label m_labelTextDirection;
  
      /** URL field label. */
      @UiField
      protected Label m_labelUrl;
  
      /** Target select box. */
      @UiField
      protected CmsSelectBox m_selectTarget;
  
      /** Language direction select box. */
      @UiField
      protected CmsSelectBox m_selectTextDirection;
  
      /** The form fields. */
      private Map<Attribute, I_CmsFormWidget> m_fields;
  
      /**
       * The constructor.<p>
       */
      public CmsImageAdvancedForm() {
  
          initWidget(m_uiBinder.createAndBindUi(this));
  
          m_labelUrl.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_URL_0));
          m_labelTarget.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_TARGET_0));
          m_labelId.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_ID_0));
          m_labelStyleClasses.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_STYLE_CLASSES_0));
          m_labelStyle.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_STYLE_RULES_0));
          m_labelSetLink.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_SET_LINK_0));
          m_labelTagAttributes.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_ATTRIBUTES_0));
          m_labelDescription.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_DESCRIPTION_0));
          m_labelLanguageCode.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_LANGUAGE_CODE_0));
          m_labelTextDirection.setText(Messages.get().key(Messages.GUI_ADVANCED_TAB_LABEL_TEXT_DIRECTION_0));
  
          m_selectTarget.addOption("", Messages.get().key(Messages.GUI_ADVANCED_TAB_VALUE_NOT_SET_0));
          m_selectTarget.addOption("_blank", Messages.get().key(Messages.GUI_ADVANCED_TAB_VALUE_NEW_WINDOW_0));
          m_selectTarget.addOption("_top", Messages.get().key(Messages.GUI_ADVANCED_TAB_VALUE_TOP_WINDOW_0));
          m_selectTarget.addOption("_self", Messages.get().key(Messages.GUI_ADVANCED_TAB_VALUE_SELF_WINDOW_0));
          m_selectTarget.addOption("_parent", Messages.get().key(Messages.GUI_ADVANCED_TAB_VALUE_PARENT_WINDOW_0));
  
          m_selectTextDirection.addOption("ltr", Messages.get().key(Messages.GUI_ADVANCED_TAB_VALUE_LEFT_TO_RIGHT_0));
          m_selectTextDirection.addOption("rtl", Messages.get().key(Messages.GUI_ADVANCED_TAB_VALUE_RIGHT_TO_LEFT_0));
          m_inputUrl.setButtonSize(Size.small);
          m_inputUrl.addInputStyleName(I_CmsLayoutBundle.INSTANCE.imageAdvancedFormCss().input());
          m_inputUrl.addStyleName(I_CmsLayoutBundle.INSTANCE.imageAdvancedFormCss().linkWidget());
          m_fields = new HashMap<Attribute, I_CmsFormWidget>();
          m_fields.put(Attribute.linkTarget, m_selectTarget);
          m_fields.put(Attribute.dir, m_selectTextDirection);
          m_fields.put(Attribute.linkPath, m_inputUrl);
          m_fields.put(Attribute.longDesc, m_inputDescription);
          m_fields.put(Attribute.style, m_inputStyle);
          m_fields.put(Attribute.clazz, m_inputStyleClasses);
          m_fields.put(Attribute.id, m_inputId);
          m_fields.put(Attribute.lang, m_inputLanguageCode);
      }
  
      /**
       * Displays the provided image information.<p>
       *
       * @param imageInfo the image information
       * @param imageAttributes the image attributes
       * @param initialFill flag to indicate that a new image has been selected
       */
      public void fillContent(CmsImageInfoBean imageInfo, CmsJSONMap imageAttributes, boolean initialFill) {
  
          for (Entry<Attribute, I_CmsFormWidget> entry : m_fields.entrySet()) {
              String val = imageAttributes.getString(entry.getKey().name());
              if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(val)) {
                  if ((entry.getKey() == Attribute.linkPath) && val.startsWith(CmsCoreProvider.get().getVfsPrefix())) {
                      entry.getValue().setFormValueAsString(val.substring(CmsCoreProvider.get().getVfsPrefix().length()));
                  } else {
                      entry.getValue().setFormValueAsString(val);
                  }
              }
          }
      }
  
      /**
       * Adds necessary attributes to the map.<p>
       *
       * @param attributes the attribute map
       * @param callback the callback to execute
       */
      public void getImageAttributes(
          final Map<String, String> attributes,
          final I_CmsSimpleCallback<Map<String, String>> callback) {
  
          boolean requiresLink = false;
  
          for (Entry<Attribute, I_CmsFormWidget> entry : m_fields.entrySet()) {
              String val = entry.getValue().getFormValueAsString();
              if (CmsStringUtil.isEmptyOrWhitespaceOnly(val)) {
                  continue;
              }
              if (entry.getKey() == Attribute.linkPath) {
                  requiresLink = true;
              } else {
                  attributes.put(entry.getKey().name(), val);
              }
          }
  