| // 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/platform_font_win.h" |
| |
| #include "base/logging.h" |
| #include "base/memory/ref_counted.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "ui/gfx/font.h" |
| |
| namespace gfx { |
| |
| namespace { |
| |
| // Returns a font based on |base_font| with height at most |target_height| and |
| // font size maximized. Returns |base_font| if height is already equal. |
| gfx::Font AdjustFontSizeForHeight(const gfx::Font& base_font, |
| int target_height) { |
| Font expected_font = base_font; |
| if (base_font.GetHeight() < target_height) { |
| // Increase size while height is <= |target_height|. |
| Font larger_font = base_font.DeriveFont(1, 0); |
| while (larger_font.GetHeight() <= target_height) { |
| expected_font = larger_font; |
| larger_font = larger_font.DeriveFont(1, 0); |
| } |
| } else if (expected_font.GetHeight() > target_height) { |
| // Decrease size until height is <= |target_height|. |
| do { |
| expected_font = expected_font.DeriveFont(-1, 0); |
| } while (expected_font.GetHeight() > target_height); |
| } |
| return expected_font; |
| } |
| |
| } // namespace |
| |
| TEST(PlatformFontWinTest, DeriveFontWithHeight) { |
| const Font base_font; |
| PlatformFontWin* platform_font = |
| static_cast<PlatformFontWin*>(base_font.platform_font()); |
| |
| for (int i = -10; i < 10; i++) { |
| const int target_height = base_font.GetHeight() + i; |
| Font expected_font = AdjustFontSizeForHeight(base_font, target_height); |
| ASSERT_LE(expected_font.GetHeight(), target_height); |
| |
| Font derived_font = platform_font->DeriveFontWithHeight(target_height, 0); |
| EXPECT_EQ(expected_font.GetFontName(), derived_font.GetFontName()); |
| EXPECT_EQ(expected_font.GetFontSize(), derived_font.GetFontSize()); |
| EXPECT_LE(expected_font.GetHeight(), target_height); |
| EXPECT_EQ(0, derived_font.GetStyle()); |
| |
| derived_font = platform_font->DeriveFontWithHeight(target_height, |
| Font::BOLD); |
| EXPECT_EQ(expected_font.GetFontName(), derived_font.GetFontName()); |
| EXPECT_EQ(expected_font.GetFontSize(), derived_font.GetFontSize()); |
| EXPECT_LE(expected_font.GetHeight(), target_height); |
| EXPECT_EQ(Font::BOLD, derived_font.GetStyle()); |
| |
| // Test that deriving from the new font has the expected result. |
| Font rederived_font = derived_font.DeriveFont(1, 0); |
| expected_font = Font(derived_font.GetFontName(), |
| derived_font.GetFontSize() + 1); |
| EXPECT_EQ(expected_font.GetFontName(), rederived_font.GetFontName()); |
| EXPECT_EQ(expected_font.GetFontSize(), rederived_font.GetFontSize()); |
| EXPECT_EQ(expected_font.GetHeight(), rederived_font.GetHeight()); |
| } |
| } |
| |
| // Callback function used by DeriveFontWithHeight_MinSize() below. |
| static int GetMinFontSize() { |
| return 10; |
| } |
| |
| TEST(PlatformFontWinTest, DeriveFontWithHeight_MinSize) { |
| PlatformFontWin::GetMinimumFontSizeCallback old_callback = |
| PlatformFontWin::get_minimum_font_size_callback; |
| PlatformFontWin::get_minimum_font_size_callback = &GetMinFontSize; |
| |
| const Font base_font; |
| const Font min_font(base_font.GetFontName(), GetMinFontSize()); |
| PlatformFontWin* platform_font = |
| static_cast<PlatformFontWin*>(base_font.platform_font()); |
| |
| const Font derived_font = |
| platform_font->DeriveFontWithHeight(min_font.GetHeight() - 1, 0); |
| EXPECT_EQ(min_font.GetFontSize(), derived_font.GetFontSize()); |
| EXPECT_EQ(min_font.GetHeight(), derived_font.GetHeight()); |
| |
| PlatformFontWin::get_minimum_font_size_callback = old_callback; |
| } |
| |
| TEST(PlatformFontWinTest, DeriveFontWithHeight_TooSmall) { |
| const Font base_font; |
| PlatformFontWin* platform_font = |
| static_cast<PlatformFontWin*>(base_font.platform_font()); |
| |
| const Font derived_font = platform_font->DeriveFontWithHeight(1, 0); |
| EXPECT_GT(derived_font.GetHeight(), 1); |
| } |
| |
| } // namespace gfx |