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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "ui/gfx/canvas.h" | |
6 | |
7 #include <limits> | |
8 | |
9 #include "base/strings/utf_string_conversions.h" | |
10 #include "testing/gtest/include/gtest/gtest.h" | |
11 #include "ui/gfx/font_list.h" | |
12 #include "ui/gfx/geometry/rect.h" | |
13 #include "ui/gfx/geometry/rect_f.h" | |
14 #include "ui/gfx/skia_util.h" | |
15 | |
16 namespace gfx { | |
17 | |
18 class CanvasTest : public testing::Test { | |
19 protected: | |
20 int GetStringWidth(const char *text) { | |
21 return Canvas::GetStringWidth(base::UTF8ToUTF16(text), font_list_); | |
22 } | |
23 | |
24 gfx::Size SizeStringInt(const char *text, int width, int line_height) { | |
25 base::string16 text16 = base::UTF8ToUTF16(text); | |
26 int height = 0; | |
27 int flags = | |
28 (text16.find('\n') != base::string16::npos) ? Canvas::MULTI_LINE : 0; | |
29 Canvas::SizeStringInt(text16, font_list_, &width, &height, line_height, | |
30 flags); | |
31 return gfx::Size(width, height); | |
32 } | |
33 | |
34 private: | |
35 FontList font_list_; | |
36 }; | |
37 | |
38 TEST_F(CanvasTest, StringWidth) { | |
39 EXPECT_GT(GetStringWidth("Test"), 0); | |
40 } | |
41 | |
42 TEST_F(CanvasTest, StringWidthEmptyString) { | |
43 EXPECT_EQ(0, GetStringWidth("")); | |
44 } | |
45 | |
46 TEST_F(CanvasTest, StringSizeEmptyString) { | |
47 gfx::Size size = SizeStringInt("", 0, 0); | |
48 EXPECT_EQ(0, size.width()); | |
49 EXPECT_GT(size.height(), 0); | |
50 } | |
51 | |
52 // Verifies GetClipBounds() returns the correct value. | |
53 TEST_F(CanvasTest, ClipRectWithScaling) { | |
54 Canvas canvas(gfx::Size(200, 100), 2.25, true); | |
55 canvas.sk_canvas()->clipRect(RectFToSkRect(gfx::RectF(100, 0, 20, 1.7f))); | |
56 gfx::Rect clip_rect; | |
57 ASSERT_TRUE(canvas.GetClipBounds(&clip_rect)); | |
58 // Use Contains() rather than Equals() as skia may extend the rect in certain | |
59 // directions. None-the-less the clip must contain the region we damaged. | |
60 EXPECT_TRUE(clip_rect.Contains(gfx::Rect(100, 0, 20, 2))); | |
61 } | |
62 | |
63 // Line height is only supported on Skia. | |
64 #if defined(OS_MACOSX) || defined(OS_ANDROID) | |
65 #define MAYBE_StringSizeWithLineHeight DISABLED_StringSizeWithLineHeight | |
66 #else | |
67 #define MAYBE_StringSizeWithLineHeight StringSizeWithLineHeight | |
68 #endif | |
69 | |
70 TEST_F(CanvasTest, MAYBE_StringSizeWithLineHeight) { | |
71 gfx::Size one_line_size = SizeStringInt("Q", 0, 0); | |
72 gfx::Size four_line_size = SizeStringInt("Q\nQ\nQ\nQ", 1000000, 1000); | |
73 EXPECT_EQ(one_line_size.width(), four_line_size.width()); | |
74 EXPECT_EQ(3 * 1000 + one_line_size.height(), four_line_size.height()); | |
75 } | |
76 | |
77 } // namespace gfx | |
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