// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/gfx/rrect_f.h"
#include "base/stl_util.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace gfx {

TEST(RRectFTest, IsEmpty) {
  EXPECT_TRUE(RRectF().IsEmpty());
  EXPECT_TRUE(RRectF(0, 0, 0, 0, 0).IsEmpty());
  EXPECT_TRUE(RRectF(0, 0, 10, 0, 0).IsEmpty());
  EXPECT_TRUE(RRectF(0, 0, 0, 10, 0).IsEmpty());
  EXPECT_TRUE(RRectF(0, 0, 0, 10, 10).IsEmpty());
  EXPECT_FALSE(RRectF(0, 0, 10, 10, 0).IsEmpty());
}

TEST(RRectFTest, Equals) {
  ASSERT_TRUE(RRectF(0, 0, 0, 0, 0, 0) == RRectF(0, 0, 0, 0, 0, 0));
  ASSERT_TRUE(RRectF(1, 2, 3, 4, 5, 6) == RRectF(1, 2, 3, 4, 5, 6));
  ASSERT_TRUE(RRectF(1, 2, 3, 4, 5, 5) == RRectF(1, 2, 3, 4, 5));
  ASSERT_TRUE(RRectF(0, 0, 2, 3, 0, 0) == RRectF(0, 0, 2, 3, 0, 1));
  ASSERT_TRUE(RRectF(0, 0, 2, 3, 0, 0) == RRectF(0, 0, 2, 3, 1, 0));

  ASSERT_TRUE(RRectF(10, 20, 30, 40, 7, 8) != RRectF(1, 20, 30, 40, 7, 8));
  ASSERT_TRUE(RRectF(10, 20, 30, 40, 7, 8) != RRectF(10, 2, 30, 40, 7, 8));
  ASSERT_TRUE(RRectF(10, 20, 30, 40, 7, 8) != RRectF(10, 20, 3, 40, 7, 8));
  ASSERT_TRUE(RRectF(10, 20, 30, 40, 7, 8) != RRectF(10, 20, 30, 4, 7, 8));
  ASSERT_TRUE(RRectF(10, 20, 30, 40, 7, 8) != RRectF(10, 20, 30, 40, 5, 8));
  ASSERT_TRUE(RRectF(10, 20, 30, 40, 7, 8) != RRectF(10, 20, 30, 40, 7, 6));
}

TEST(RRectFTest, PlusMinusOffset) {
  const RRectF a(40, 50, 60, 70, 5);
  gfx::Vector2d offset(23, 34);
  RRectF correct(63, 84, 60, 70, 5);
  RRectF b = a + offset;
  ASSERT_EQ(b, correct);
  b = a;
  b.Offset(offset);
  ASSERT_EQ(b, correct);

  correct = RRectF(17, 16, 60, 70, 5);
  b = a - offset;
  ASSERT_EQ(b, correct);
  b = a;
  b.Offset(-offset);
  ASSERT_EQ(b, correct);
}

TEST(RRectFTest, RRectTypes) {
  RRectF a(40, 50, 0, 70, 0);
  EXPECT_EQ(a.GetType(), RRectF::Type::kEmpty);
  EXPECT_TRUE(a.IsEmpty());
  a = RRectF(40, 50, 60, 70, 0);
  EXPECT_EQ(a.GetType(), RRectF::Type::kRect);
  a = RRectF(40, 50, 60, 70, 5);
  EXPECT_EQ(a.GetType(), RRectF::Type::kSingle);
  a = RRectF(40, 50, 60, 70, 5, 5);
  EXPECT_EQ(a.GetType(), RRectF::Type::kSingle);
  a = RRectF(40, 50, 60, 70, 6, 3);
  EXPECT_EQ(a.GetType(), RRectF::Type::kSimple);
  a = RRectF(40, 50, 60, 70, 30, 3);
  EXPECT_EQ(a.GetType(), RRectF::Type::kSimple);
  a = RRectF(40, 50, 60, 70, 30, 35);
  EXPECT_EQ(a.GetType(), RRectF::Type::kOval);
  a.SetCornerRadii(RRectF::Corner::kLowerRight, gfx::Vector2dF(7, 8));
  EXPECT_EQ(a.GetType(), RRectF::Type::kComplex);

  // When one radius is larger than half its dimension, both radii are scaled
  // down proportionately.
  a = RRectF(40, 50, 60, 70, 30, 70);
  EXPECT_EQ(a.GetType(), RRectF::Type::kSimple);
  EXPECT_EQ(a, RRectF(40, 50, 60, 70, 15, 35));
  // If they stay equal to half the radius, it stays oval.
  a = RRectF(40, 50, 60, 70, 120, 140);
  EXPECT_EQ(a.GetType(), RRectF::Type::kOval);
}

void CheckRadii(RRectF val,
                float ulx,
                float uly,
                float urx,
                float ury,
                float lrx,
                float lry,
                float llx,
                float lly) {
  EXPECT_EQ(val.GetCornerRadii(RRectF::Corner::kUpperLeft),
            gfx::Vector2dF(ulx, uly));
  EXPECT_EQ(val.GetCornerRadii(RRectF::Corner::kUpperRight),
            gfx::Vector2dF(urx, ury));
  EXPECT_EQ(val.GetCornerRadii(RRectF::Corner::kLowerRight),
            gfx::Vector2dF(lrx, lry));
  EXPECT_EQ(val.GetCornerRadii(RRectF::Corner::kLowerLeft),
            gfx::Vector2dF(llx, lly));
}

TEST(RRectFTest, RRectRadii) {
  RRectF a(40, 50, 60, 70, 0);
  CheckRadii(a, 0, 0, 0, 0, 0, 0, 0, 0);

  a.SetCornerRadii(RRectF::Corner::kUpperLeft, gfx::Vector2dF(1, 2));
  CheckRadii(a, 1, 2, 0, 0, 0, 0, 0, 0);

  a.SetCornerRadii(RRectF::Corner::kUpperRight, gfx::Vector2dF(3, 4));
  CheckRadii(a, 1, 2, 3, 4, 0, 0, 0, 0);

  a.SetCornerRadii(RRectF::Corner::kLowerRight, gfx::Vector2dF(5, 6));
  CheckRadii(a, 1, 2, 3, 4, 5, 6, 0, 0);

  a.SetCornerRadii(RRectF::Corner::kLowerLeft, gfx::Vector2dF(7, 8));
  CheckRadii(a, 1, 2, 3, 4, 5, 6, 7, 8);
}

TEST(RRectFTest, FromRectF) {
  // Check that explicit conversion from float rect works.
  RectF a(40, 50, 60, 70);
  RRectF b(40, 50, 60, 70, 0);
  RRectF c = RRectF(a);
  EXPECT_EQ(b, c);
}

TEST(RRectFTest, FromSkRRect) {
  // Check that explicit conversion from SkRRect works.
  SkRRect a = SkRRect::MakeRectXY(SkRect::MakeXYWH(40, 50, 60, 70), 15, 25);
  RRectF b(40, 50, 60, 70, 15, 25);
  RRectF c = RRectF(a);
  EXPECT_EQ(b, c);

  // Try with single radius constructor.
  a = SkRRect::MakeRectXY(SkRect::MakeXYWH(40, 50, 60, 70), 15, 15);
  b = RRectF(40, 50, 60, 70, 15);
  c = RRectF(a);
  EXPECT_EQ(b, c);
}

TEST(RRectFTest, ToString) {
  RRectF a(40, 50, 60, 70, 0);
  EXPECT_EQ(a.ToString(), "40.000,50.000 60.000x70.000, rectangular");
  a = RRectF(40, 50, 60, 70, 15);
  EXPECT_EQ(a.ToString(), "40.000,50.000 60.000x70.000, radius 15.000");
  a = RRectF(40, 50, 60, 70, 15, 25);
  EXPECT_EQ(a.ToString(),
            "40.000,50.000 60.000x70.000, x_rad 15.000, y_rad 25.000");
  a.SetCornerRadii(RRectF::Corner::kLowerRight, gfx::Vector2dF(7, 8));
  EXPECT_EQ(a.ToString(),
            "40.000,50.000 60.000x70.000, [15.000 25.000] "
            "[15.000 25.000] [7.000 8.000] [15.000 25.000]");
}

TEST(RRectFTest, Sizes) {
  RRectF a(40, 50, 60, 70, 5, 6);
  EXPECT_EQ(a.rect().x(), 40);
  EXPECT_EQ(a.rect().y(), 50);
  EXPECT_EQ(a.rect().width(), 60);
  EXPECT_EQ(a.rect().height(), 70);
  EXPECT_EQ(a.GetSimpleRadii().x(), 5);
  EXPECT_EQ(a.GetSimpleRadii().y(), 6);
  a = RRectF(40, 50, 60, 70, 5, 5);
  EXPECT_EQ(a.GetSimpleRadius(), 5);
  a.Clear();
  EXPECT_TRUE(a.IsEmpty());
  // Make sure ovals can still get simple radii
  a = RRectF(40, 50, 60, 70, 30, 35);
  EXPECT_EQ(a.GetType(), RRectF::Type::kOval);
  EXPECT_EQ(a.GetSimpleRadii().x(), 30);
  EXPECT_EQ(a.GetSimpleRadii().y(), 35);
}

TEST(RRectFTest, Contains) {
  RRectF a(40, 50, 60, 70, 5, 6);
  RectF b(50, 60, 5, 6);
  EXPECT_TRUE(a.Contains(b));
  b = RectF(40, 50, 5, 6);  // Right on the border
  EXPECT_FALSE(a.Contains(b));
  b = RectF(95, 114, 5, 6);  // Right on the border
  EXPECT_FALSE(a.Contains(b));
  b = RectF(40, 50, 60, 70);
  EXPECT_FALSE(a.Contains(b));
}

TEST(RRectFTest, Scale) {
  // Note that SKRRect (the backing for RRectF) does not support scaling by NaN,
  // scaling out of numerical bounds, or scaling to zero. So this test doesn't
  // exercise those.
  static const struct Test {
    float x1;  // source
    float y1;
    float w1;
    float h1;
    float r1;

    float scale;
    float x2;  // target
    float y2;
    float w2;
    float h2;
    float r2;
  } tests[] = {
      {3.0f, 4.0f, 5.0f, 6.0f, 1.0f, 1.5f, 4.5f, 6.0f, 7.5f, 9.0f, 1.5f},
      {3.0f, 4.0f, 5.0f, 6.0f, 0.0f, 1.5f, 4.5f, 6.0f, 7.5f, 9.0f, 0.0f},
  };

  for (size_t i = 0; i < base::size(tests); ++i) {
    RRectF r1(tests[i].x1, tests[i].y1, tests[i].w1, tests[i].h1, tests[i].r1);
    RRectF r2(tests[i].x2, tests[i].y2, tests[i].w2, tests[i].h2, tests[i].r2);

    r1.Scale(tests[i].scale);
    EXPECT_TRUE((r1.GetType() == RRectF::Type::kRect) ||
                (r1.GetType() == RRectF::Type::kSingle));
    EXPECT_EQ(r1.rect().x(), r2.rect().x());
    EXPECT_EQ(r1.rect().y(), r2.rect().y());
    EXPECT_EQ(r1.rect().width(), r2.rect().width());
    EXPECT_EQ(r1.rect().height(), r2.rect().height());
    EXPECT_EQ(r1.GetSimpleRadius(), r2.GetSimpleRadius());
  }
}

TEST(RRectFTest, InsetOutset) {
  RRectF a(40, 50, 60, 70, 5);
  RRectF b = a;
  b.Inset(3);
  ASSERT_EQ(b, RRectF(43, 53, 54, 64, 2));
  b = a;
  b.Outset(3);
  ASSERT_EQ(b, RRectF(37, 47, 66, 76, 8));
}

}  // namespace gfx