content: /*
   * Copyright (C) 2019 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.state.helpers;
  
  import androidx.constraintlayout.core.state.ConstraintReference;
  import androidx.constraintlayout.core.state.HelperReference;
  import androidx.constraintlayout.core.state.State;
  
  public class AlignHorizontallyReference extends HelperReference {
  
      private float mBias = 0.5f;
  
      public AlignHorizontallyReference(State state) {
          super(state, State.Helper.ALIGN_VERTICALLY);
      }
  
      // @TODO: add description
      @Override
      public void apply() {
          for (Object key : mReferences) {
              ConstraintReference reference = mHelperState.constraints(key);
              reference.clearHorizontal();
              if (mStartToStart != null) {
                  reference.startToStart(mStartToStart);
              } else if (mStartToEnd != null) {
                  reference.startToEnd(mStartToEnd);
              } else {
                  reference.startToStart(State.PARENT);
              }
              if (mEndToStart != null) {
                  reference.endToStart(mEndToStart);
              } else if (mEndToEnd != null) {
                  reference.endToEnd(mEndToEnd);
              } else {
                  reference.endToEnd(State.PARENT);
              }
              if (mBias != 0.5f) {
                  reference.horizontalBias(mBias);
              }
          }
      }
  
  }
  