content: /*
   * Copyright (C) 2017 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 com.android.internal.widget;
  
  import android.annotation.Nullable;
  import android.content.Context;
  import android.util.AttributeSet;
  import android.view.View;
  import android.widget.LinearLayout;
  import android.widget.RemoteViews;
  
  /**
   * A LinearLayout that sets it's height again after the last measure pass. This is needed for
   * MessagingLayouts where groups need to be able to snap it's height to.
   */
  @RemoteViews.RemoteView
  public class RemeasuringLinearLayout extends LinearLayout {
  
      public RemeasuringLinearLayout(Context context) {
          super(context);
      }
  
      public RemeasuringLinearLayout(Context context, @Nullable AttributeSet attrs) {
          super(context, attrs);
      }
  
      public RemeasuringLinearLayout(Context context, @Nullable AttributeSet attrs,
              int defStyleAttr) {
          super(context, attrs, defStyleAttr);
      }
  
      public RemeasuringLinearLayout(Context context, AttributeSet attrs, int defStyleAttr,
              int defStyleRes) {
          super(context, attrs, defStyleAttr, defStyleRes);
      }
  
      @Override
      protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          super.onMeasure(widthMeasureSpec, heightMeasureSpec);
          int count = getChildCount();
          int height = 0;
          for (int i = 0; i < count; ++i) {
              final View child = getChildAt(i);
              if (child == null || child.getVisibility() == View.GONE) {
                  continue;
              }
  
              final LayoutParams lp = (LayoutParams) child.getLayoutParams();
              height = Math.max(height, height + child.getMeasuredHeight() + lp.topMargin +
                      lp.bottomMargin);
          }
          setMeasuredDimension(getMeasuredWidth(), height);
      }
  }
  