content: /*
   * Copyright (C) 2021 The Android Open Source Project
   *
   * Licensed 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 androidx.constraintlayout.core.widgets;
  
  import androidx.constraintlayout.core.widgets.analyzer.Grouping;
  import androidx.constraintlayout.core.widgets.analyzer.WidgetGroup;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashMap;
  
  /**
   * HelperWidget class
   */
  public class HelperWidget extends ConstraintWidget implements Helper {
      public ConstraintWidget[] mWidgets = new ConstraintWidget[4];
      public int mWidgetsCount = 0;
  
      @Override
      public void updateConstraints(ConstraintWidgetContainer container) {
          // nothing here
      }
  
      /**
       * Add a widget to the helper
       *
       * @param widget a widget
       */
      @Override
      public void add(ConstraintWidget widget) {
          if (widget == this || widget == null) {
              return;
          }
          if (mWidgetsCount + 1 > mWidgets.length) {
              mWidgets = Arrays.copyOf(mWidgets, mWidgets.length * 2);
          }
          mWidgets[mWidgetsCount] = widget;
          mWidgetsCount++;
      }
  
      @Override
      public void copy(ConstraintWidget src, HashMap<ConstraintWidget, ConstraintWidget> map) {
          super.copy(src, map);
          HelperWidget srcHelper = (HelperWidget) src;
          mWidgetsCount = 0;
          final int count = srcHelper.mWidgetsCount;
          for (int i = 0; i < count; i++) {
              add(map.get(srcHelper.mWidgets[i]));
          }
      }
  
      /**
       * Reset the widgets list contained by this helper
       */
      @Override
      public void removeAllIds() {
          mWidgetsCount = 0;
          Arrays.fill(mWidgets, null);
      }
  
      // @TODO: add description
      public void addDependents(ArrayList<WidgetGroup> dependencyLists,
              int orientation,
              WidgetGroup group) {
          for (int i = 0; i < mWidgetsCount; i++) {
              ConstraintWidget widget = mWidgets[i];
              group.add(widget);
          }
          for (int i = 0; i < mWidgetsCount; i++) {
              ConstraintWidget widget = mWidgets[i];
              Grouping.findDependents(widget, orientation, dependencyLists, group);
          }
      }
  
      // @TODO: add description
      public int findGroupInDependents(int orientation) {
          for (int i = 0; i < mWidgetsCount; i++) {
              ConstraintWidget widget = mWidgets[i];
              if (orientation == HORIZONTAL && widget.horizontalGroup != -1) {
                  return widget.horizontalGroup;
              }
              if (orientation == VERTICAL && widget.verticalGroup != -1) {
                  return widget.verticalGroup;
              }
          }
          return -1;
      }
  }
  