ui: Add methods to clamp Sizes, Points, and Vectors from above or below.

ui/gfx/point_unittest.cc

 // Copyright (c) 2012 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/point_base.h"
 
 #include "base/basictypes.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/point_conversions.h"
@@ skipping 80 matching lines @@
   EXPECT_EQ(Point(11, 11), ToRoundedPoint(PointF(10.5f, 10.5f)));
   EXPECT_EQ(Point(11, 11), ToRoundedPoint(PointF(10.9999f, 10.9999f)));
 
   EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10, -10)));
   EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10.0001f, -10.0001f)));
   EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10.4999f, -10.4999f)));
   EXPECT_EQ(Point(-11, -11), ToRoundedPoint(PointF(-10.5f, -10.5f)));
   EXPECT_EQ(Point(-11, -11), ToRoundedPoint(PointF(-10.9999f, -10.9999f)));
 }
 
+TEST(PointTest, ClampPoint) {
+  Point a;
+
+  a = Point(3, 5);
+  EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
+  a.ClampFromBelow(Point(2, 4));
+  EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
+  a.ClampFromBelow(Point(3, 5));
+  EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
+  a.ClampFromBelow(Point(4, 2));
+  EXPECT_EQ(Point(4, 5).ToString(), a.ToString());
+  a.ClampFromBelow(Point(8, 10));
+  EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
+
+  a.ClampFromAbove(Point(9, 11));
+  EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
+  a.ClampFromAbove(Point(8, 10));
+  EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
+  a.ClampFromAbove(Point(11, 9));
+  EXPECT_EQ(Point(8, 9).ToString(), a.ToString());
+  a.ClampFromAbove(Point(7, 11));
+  EXPECT_EQ(Point(7, 9).ToString(), a.ToString());
+  a.ClampFromAbove(Point(3, 5));
+  EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
+}
+
+TEST(PointTest, ClampPointF) {
+  PointF a;
+
+  a = PointF(3.5f, 5.5f);
+  EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
+  a.ClampFromBelow(PointF(2.5f, 4.5f));
+  EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
+  a.ClampFromBelow(PointF(3.5f, 5.5f));
+  EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
+  a.ClampFromBelow(PointF(4.5f, 2.5f));
+  EXPECT_EQ(PointF(4.5f, 5.5f).ToString(), a.ToString());
+  a.ClampFromBelow(PointF(8.5f, 10.5f));
+  EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
+
+  a.ClampFromAbove(PointF(9.5f, 11.5f));
+  EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
+  a.ClampFromAbove(PointF(8.5f, 10.5f));
+  EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
+  a.ClampFromAbove(PointF(11.5f, 9.5f));
+  EXPECT_EQ(PointF(8.5f, 9.5f).ToString(), a.ToString());
+  a.ClampFromAbove(PointF(7.5f, 11.5f));
+  EXPECT_EQ(PointF(7.5f, 9.5f).ToString(), a.ToString());
+  a.ClampFromAbove(PointF(3.5f, 5.5f));
+  EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
+}
+
 }  // namespace gfx