react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/MeasureSpecAssertions.java

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

package com.facebook.react.uimanager;

import android.view.View;

/**
 * Shared utility for asserting on MeasureSpecs.
 */
public class MeasureSpecAssertions {

  public static final void assertExplicitMeasureSpec(int widthMeasureSpec, int heightMeasureSpec) {
    int widthMode = View.MeasureSpec.getMode(widthMeasureSpec);
    int heightMode = View.MeasureSpec.getMode(heightMeasureSpec);

    if (widthMode == View.MeasureSpec.UNSPECIFIED || heightMode == View.MeasureSpec.UNSPECIFIED) {
      throw new IllegalStateException(
          "A catalyst view must have an explicit width and height given to it. This should " +
              "normally happen as part of the standard catalyst UI framework.");
    }
  }
}