react-native/React/Base/Surface/SurfaceHostingView/RCTSurfaceSizeMeasureMode.mm

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#import <UIKit/UIKit.h>

#import "RCTSurfaceSizeMeasureMode.h"

void RCTSurfaceMinimumSizeAndMaximumSizeFromSizeAndSizeMeasureMode(
  CGSize size,
  RCTSurfaceSizeMeasureMode sizeMeasureMode,
  CGSize *minimumSize,
  CGSize *maximumSize
) {
  *minimumSize = CGSizeZero;
  *maximumSize = CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX);

  if (sizeMeasureMode & RCTSurfaceSizeMeasureModeWidthExact) {
    minimumSize->width = size.width;
    maximumSize->width = size.width;
  }
  else if (sizeMeasureMode & RCTSurfaceSizeMeasureModeWidthAtMost) {
    maximumSize->width = size.width;
  }

  if (sizeMeasureMode & RCTSurfaceSizeMeasureModeHeightExact) {
    minimumSize->height = size.height;
    maximumSize->height = size.height;
  }
  else if (sizeMeasureMode & RCTSurfaceSizeMeasureModeHeightAtMost) {
    maximumSize->height = size.height;
  }
}