content: /*
   * Copyright (C) 2011 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 android.widget;
  
  import android.content.Context;
  import android.graphics.Canvas;
  import android.util.AttributeSet;
  import android.view.View;
  
  /**
   * Space is a lightweight View subclass that may be used to create gaps between components
   * in general purpose layouts.
   */
  public final class Space extends View {
      /**
       * {@inheritDoc}
       */
      public Space(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
          super(context, attrs, defStyleAttr, defStyleRes);
          if (getVisibility() == VISIBLE) {
              setVisibility(INVISIBLE);
          }
      }
  
      /**
       * {@inheritDoc}
       */
      public Space(Context context, AttributeSet attrs, int defStyleAttr) {
          this(context, attrs, defStyleAttr, 0);
      }
  
      /**
       * {@inheritDoc}
       */
      public Space(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      /**
       * {@inheritDoc}
       */
      public Space(Context context) {
          //noinspection NullableProblems
          this(context, null);
      }
  
      /**
       * Draw nothing.
       *
       * @param canvas an unused parameter.
       */
      @Override
      public void draw(Canvas canvas) {
      }
  
      /**
       * Compare to: {@link View#getDefaultSize(int, int)}
       * If mode is AT_MOST, return the child size instead of the parent size
       * (unless it is too big).
       */
      private static int getDefaultSize2(int size, int measureSpec) {
          int result = size;
          int specMode = MeasureSpec.getMode(measureSpec);
          int specSize = MeasureSpec.getSize(measureSpec);
  
          switch (specMode) {
              case MeasureSpec.UNSPECIFIED:
                  result = size;
                  break;
              case MeasureSpec.AT_MOST:
                  result = Math.min(size, specSize);
                  break;
              case MeasureSpec.EXACTLY:
                  result = specSize;
                  break;
          }
          return result;
      }
  
      @Override
      protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          setMeasuredDimension(
                  getDefaultSize2(getSuggestedMinimumWidth(), widthMeasureSpec),
                  getDefaultSize2(getSuggestedMinimumHeight(), heightMeasureSpec));
      }
  }
  