/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef NSSIZE_H
#define NSSIZE_H

#include "nsCoord.h"
#include "mozilla/gfx/BaseSize.h"
#include "mozilla/gfx/Point.h"

// Maximum allowable size
inline constexpr nscoord NS_MAXSIZE = nscoord_MAX;

typedef mozilla::gfx::IntSize nsIntSize;

struct nsSize : public mozilla::gfx::BaseSize<nscoord, nsSize> {
  typedef mozilla::gfx::BaseSize<nscoord, nsSize> Super;

  constexpr nsSize() = default;
  constexpr nsSize(nscoord aWidth, nscoord aHeight) : Super(aWidth, aHeight) {}

  mozilla::gfx::IntSize ScaleToNearestPixels(float aXScale, float aYScale,
                                             nscoord aAppUnitsPerPixel) const {
    return {NSToIntRoundUp(NSAppUnitsToDoublePixels(width, aAppUnitsPerPixel) *
                           aXScale),
            NSToIntRoundUp(NSAppUnitsToDoublePixels(height, aAppUnitsPerPixel) *
                           aYScale)};
  }

  mozilla::gfx::IntSize ToNearestPixels(nscoord aAppUnitsPerPixel) const {
    return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);
  }

  /**
   * Return this size scaled to a different appunits per pixel (APP) ratio.
   * @param aFromAPP the APP to scale from
   * @param aToAPP the APP to scale to
   */
  [[nodiscard]] nsSize ScaleToOtherAppUnits(int32_t aFromAPP,
                                            int32_t aToAPP) const {
    if (aFromAPP != aToAPP) {
      nsSize size;
      size.width = NSToCoordRound(NSCoordScale(width, aFromAPP, aToAPP));
      size.height = NSToCoordRound(NSCoordScale(height, aFromAPP, aToAPP));
      return size;
    }
    return *this;
  }
};

inline nsSize IntSizeToAppUnits(mozilla::gfx::IntSize aSize,
                                nscoord aAppUnitsPerPixel) {
  return nsSize(NSIntPixelsToAppUnits(aSize.width, aAppUnitsPerPixel),
                NSIntPixelsToAppUnits(aSize.height, aAppUnitsPerPixel));
}

#endif /* NSSIZE_H */