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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * 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 ROUNDED_RECT_H
#define ROUNDED_RECT_H

#include "gfxRect.h"
#include "gfxTypes.h"
#include "mozilla/gfx/PathHelpers.h"

namespace mozilla {
/* A rounded rectangle abstraction.
 *
 * This can represent a rectangle with a different pair of radii on each corner.
 *
 * Note: CoreGraphics and Direct2D only support rounded rectangle with the same
 * radii on all corners. However, supporting CSS's border-radius requires the
 * extra flexibility. */
struct RoundedRect {
  typedef mozilla::gfx::RectCornerRadii RectCornerRadii;

  RoundedRect(const gfxRect& aRect, const RectCornerRadii& aCorners)
      : rect(aRect), corners(aCorners) {}

  void Deflate(gfxFloat aTopWidth, gfxFloat aBottomWidth, gfxFloat aLeftWidth,
               gfxFloat aRightWidth) {
    // deflate the internal rect
    rect.SetRect(rect.X() + aLeftWidth, rect.Y() + aTopWidth,
                 std::max(0., rect.Width() - aLeftWidth - aRightWidth),
                 std::max(0., rect.Height() - aTopWidth - aBottomWidth));

    corners.radii[mozilla::eCornerTopLeft].width =
        std::max(0., corners.radii[mozilla::eCornerTopLeft].width - aLeftWidth);
    corners.radii[mozilla::eCornerTopLeft].height =
        std::max(0., corners.radii[mozilla::eCornerTopLeft].height - aTopWidth);

    corners.radii[mozilla::eCornerTopRight].width = std::max(
        0., corners.radii[mozilla::eCornerTopRight].width - aRightWidth);
    corners.radii[mozilla::eCornerTopRight].height = std::max(
        0., corners.radii[mozilla::eCornerTopRight].height - aTopWidth);

    corners.radii[mozilla::eCornerBottomLeft].width = std::max(
        0., corners.radii[mozilla::eCornerBottomLeft].width - aLeftWidth);
    corners.radii[mozilla::eCornerBottomLeft].height = std::max(
        0., corners.radii[mozilla::eCornerBottomLeft].height - aBottomWidth);

    corners.radii[mozilla::eCornerBottomRight].width = std::max(
        0., corners.radii[mozilla::eCornerBottomRight].width - aRightWidth);
    corners.radii[mozilla::eCornerBottomRight].height = std::max(
        0., corners.radii[mozilla::eCornerBottomRight].height - aBottomWidth);
  }
  gfxRect rect;
  RectCornerRadii corners;
};

}  // namespace mozilla

#endif