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// 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/font.h"
#include "base/string16.h"
#include "base/utf_string_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
#include <pango/pango.h>
#elif defined(OS_WIN)
#include "ui/gfx/platform_font_win.h"
#endif
namespace gfx {
namespace {
class FontTest : public testing::Test {
public:
// Fulfills the memory management contract as outlined by the comment at
// gfx::Font::GetNativeFont().
void FreeIfNecessary(NativeFont font) {
#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
pango_font_description_free(font);
#endif
}
};
#if defined(OS_WIN)
class ScopedMinimumFontSizeCallback {
public:
explicit ScopedMinimumFontSizeCallback(int minimum_size) {
minimum_size_ = minimum_size;
old_callback_ = PlatformFontWin::get_minimum_font_size_callback;
PlatformFontWin::get_minimum_font_size_callback = &GetMinimumFontSize;
}
~ScopedMinimumFontSizeCallback() {
PlatformFontWin::get_minimum_font_size_callback = old_callback_;
}
private:
static int GetMinimumFontSize() {
return minimum_size_;
}
PlatformFontWin::GetMinimumFontSizeCallback old_callback_;
static int minimum_size_;
DISALLOW_COPY_AND_ASSIGN(ScopedMinimumFontSizeCallback);
};
int ScopedMinimumFontSizeCallback::minimum_size_ = 0;
#endif // defined(OS_WIN)
TEST_F(FontTest, LoadArial) {
Font cf("Arial", 16);
NativeFont native = cf.GetNativeFont();
ASSERT_TRUE(native);
ASSERT_EQ(cf.GetStyle(), Font::NORMAL);
ASSERT_EQ(cf.GetFontSize(), 16);
ASSERT_EQ(cf.GetFontName(), "Arial");
FreeIfNecessary(native);
}
TEST_F(FontTest, LoadArialBold) {
Font cf("Arial", 16);
Font bold(cf.DeriveFont(0, Font::BOLD));
NativeFont native = bold.GetNativeFont();
ASSERT_TRUE(native);
ASSERT_EQ(bold.GetStyle(), Font::BOLD);
FreeIfNecessary(native);
}
TEST_F(FontTest, Ascent) {
Font cf("Arial", 16);
ASSERT_GT(cf.GetBaseline(), 2);
ASSERT_LE(cf.GetBaseline(), 22);
}
TEST_F(FontTest, Height) {
Font cf("Arial", 16);
ASSERT_GE(cf.GetHeight(), 16);
// TODO(akalin): Figure out why height is so large on Linux.
ASSERT_LE(cf.GetHeight(), 26);
}
TEST_F(FontTest, AvgWidths) {
Font cf("Arial", 16);
ASSERT_EQ(cf.GetExpectedTextWidth(0), 0);
ASSERT_GT(cf.GetExpectedTextWidth(1), cf.GetExpectedTextWidth(0));
ASSERT_GT(cf.GetExpectedTextWidth(2), cf.GetExpectedTextWidth(1));
ASSERT_GT(cf.GetExpectedTextWidth(3), cf.GetExpectedTextWidth(2));
}
TEST_F(FontTest, AvgCharWidth) {
Font cf("Arial", 16);
ASSERT_GT(cf.GetAverageCharacterWidth(), 0);
}
TEST_F(FontTest, Widths) {
Font cf("Arial", 16);
ASSERT_EQ(cf.GetStringWidth(string16()), 0);
ASSERT_GT(cf.GetStringWidth(ASCIIToUTF16("a")),
cf.GetStringWidth(string16()));
ASSERT_GT(cf.GetStringWidth(ASCIIToUTF16("ab")),
cf.GetStringWidth(ASCIIToUTF16("a")));
ASSERT_GT(cf.GetStringWidth(ASCIIToUTF16("abc")),
cf.GetStringWidth(ASCIIToUTF16("ab")));
}
#if defined(OS_WIN)
TEST_F(FontTest, DeriveFontResizesIfSizeTooSmall) {
Font cf("Arial", 8);
// The minimum font size is set to 5 in browser_main.cc.
ScopedMinimumFontSizeCallback minimum_size(5);
Font derived_font = cf.DeriveFont(-4);
EXPECT_EQ(5, derived_font.GetFontSize());
}
TEST_F(FontTest, DeriveFontKeepsOriginalSizeIfHeightOk) {
Font cf("Arial", 8);
// The minimum font size is set to 5 in browser_main.cc.
ScopedMinimumFontSizeCallback minimum_size(5);
Font derived_font = cf.DeriveFont(-2);
EXPECT_EQ(6, derived_font.GetFontSize());
}
#endif // defined(OS_WIN)
} // namespace
} // namespace gfx
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