content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package org.apache.causeway.viewer.wicket.ui.components.layout.bs.tabs;
  
  import org.apache.wicket.markup.html.WebMarkupContainer;
  
  import org.apache.causeway.applib.layout.grid.bootstrap.BSRow;
  import org.apache.causeway.applib.layout.grid.bootstrap.BSTab;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.viewer.wicket.model.hints.HasUiHintDisambiguator;
  import org.apache.causeway.viewer.wicket.model.models.UiObjectWkt;
  import org.apache.causeway.viewer.wicket.ui.components.layout.bs.col.RepeatingViewWithDynamicallyVisibleContent;
  import org.apache.causeway.viewer.wicket.ui.components.layout.bs.row.Row;
  import org.apache.causeway.viewer.wicket.ui.panels.HasDynamicallyVisibleContent;
  import org.apache.causeway.viewer.wicket.ui.panels.PanelAbstract;
  import org.apache.causeway.viewer.wicket.ui.util.Wkt;
  import org.apache.causeway.viewer.wicket.ui.util.WktComponents;
  
  public class TabPanel
  extends PanelAbstract<ManagedObject, UiObjectWkt>
  implements HasUiHintDisambiguator, HasDynamicallyVisibleContent {
  
      private static final long serialVersionUID = 1L;
  
      private static final String ID_TAB_PANEL = "tabPanel";
      private static final String ID_ROWS = "rows";
  
      private final BSTab bsTab;
  
      public TabPanel(final String id, final UiObjectWkt model, final BSTab bsTab) {
          this(id, model, bsTab, null);
      }
  
      public TabPanel(final String id, final UiObjectWkt model, final BSTab bsTab, final RepeatingViewWithDynamicallyVisibleContent repeatingViewWithDynamicallyVisibleContent) {
          super(id);
  
          this.bsTab = bsTab;
          buildGui(model, bsTab, repeatingViewWithDynamicallyVisibleContent);
      }
  
      /**
       * when tabs are rendered, they don't distinguish within the path hierarchy: even if on different tabs, the first
       * panel will have the same Wicket path hierarchy.  This property allows us to distinguish.
       */
      @Override
      public String getHintDisambiguator() {
          return bsTab.getName();
      }
  
      protected void buildGui(final UiObjectWkt model, final BSTab bsTab, final RepeatingViewWithDynamicallyVisibleContent rvIfAny) {
  
          final WebMarkupContainer div = new WebMarkupContainer(ID_TAB_PANEL);
  
          final RepeatingViewWithDynamicallyVisibleContent rv = rvIfAny != null ? rvIfAny : newRows(model, bsTab);
          div.add(rv);
          visible = visible || rv.isVisible();
  
          final WebMarkupContainer panel = this;
          if(visible) {
              Wkt.cssAppend(panel, bsTab.getCssClass());
              panel.add(div);
          } else {
              WktComponents.permanentlyHide(panel, div.getId());
          }
  
      }
  
      public static RepeatingViewWithDynamicallyVisibleContent newRows(final UiObjectWkt model, final BSTab bsTab) {
          final RepeatingViewWithDynamicallyVisibleContent rv = new RepeatingViewWithDynamicallyVisibleContent(ID_ROWS);
  
          for(final BSRow bsRow: bsTab.getRows()) {
              final String newChildId = rv.newChildId();
              final Row row = new Row(newChildId, model, bsRow);
              rv.add(row);
          }
          return rv;
      }
  
      private boolean visible = false;
      @Override
      public boolean isVisible() {
          return visible;
      }
  }
  