text: // Copyright 2013 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/display/manager/display_change_observer.h"
  
  #include <string>
  
  #include "base/test/scoped_feature_list.h"
  #include "testing/gtest/include/gtest/gtest.h"
  #include "ui/display/display_switches.h"
  #include "ui/display/manager/display_configurator.h"
  #include "ui/display/manager/fake_display_snapshot.h"
  #include "ui/display/manager/managed_display_info.h"
  #include "ui/display/types/display_mode.h"
  #include "ui/gfx/geometry/rect.h"
  #include "ui/gfx/geometry/size.h"
  
  namespace display {
  
  namespace {
  
  float ComputeDeviceScaleFactor(float diagonal_inch,
                                 const gfx::Rect& resolution) {
    // We assume that displays have square pixel.
    float diagonal_pixel = std::sqrt(std::pow(resolution.width(), 2) +
                                     std::pow(resolution.height(), 2));
    float dpi = diagonal_pixel / diagonal_inch;
    return DisplayChangeObserver::FindDeviceScaleFactor(dpi);
  }
  
  std::unique_ptr<DisplayMode> MakeDisplayMode(int width,
                                               int height,
                                               bool is_interlaced,
                                               float refresh_rate) {
    return std::make_unique<DisplayMode>(gfx::Size(width, height), is_interlaced,
                                         refresh_rate);
  }
  
  }  // namespace
  
  class DisplayChangeObserverTest : public testing::Test {
   public:
    DisplayChangeObserverTest() = default;
  
    void SetUp() override {
      scoped_feature_list_.InitAndDisableFeature(
          features::kEnableDisplayZoomSetting);
      testing::Test::SetUp();
    }
  
   private:
    base::test::ScopedFeatureList scoped_feature_list_;
  
    DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserverTest);
  };
  
  TEST_F(DisplayChangeObserverTest, GetExternalManagedDisplayModeList) {
    std::unique_ptr<DisplaySnapshot> display_snapshot =
        FakeDisplaySnapshot::Builder()
            .SetId(123)
            .SetNativeMode(MakeDisplayMode(1920, 1200, false, 60))
            // All non-interlaced (as would be seen with different refresh rates).
            .AddMode(MakeDisplayMode(1920, 1080, false, 80))
            .AddMode(MakeDisplayMode(1920, 1080, false, 70))
            .AddMode(MakeDisplayMode(1920, 1080, false, 60))
            // Interlaced vs non-interlaced.
            .AddMode(MakeDisplayMode(1280, 720, true, 60))
            .AddMode(MakeDisplayMode(1280, 720, false, 60))
            // Interlaced only.
            .AddMode(MakeDisplayMode(1024, 768, true, 70))
            .AddMode(MakeDisplayMode(1024, 768, true, 60))
            // Mixed.
            .AddMode(MakeDisplayMode(1024, 600, true, 60))
            .AddMode(MakeDisplayMode(1024, 600, false, 70))
            .AddMode(MakeDisplayMode(1024, 600, false, 60))
            // Just one interlaced mode.
            .AddMode(MakeDisplayMode(640, 480, true, 60))
            .Build();
  
    ManagedDisplayInfo::ManagedDisplayModeList display_modes =
        DisplayChangeObserver::GetExternalManagedDisplayModeList(
            *display_snapshot);
    ASSERT_EQ(6u, display_modes.size());
    EXPECT_EQ("640x480", display_modes[0].size().ToString());
    EXPECT_TRUE(display_modes[0].is_interlaced());
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);
  
    EXPECT_EQ("1024x600", display_modes[1].size().ToString());
    EXPECT_FALSE(display_modes[1].is_interlaced());
    EXPECT_EQ(display_modes[1].refresh_rate(), 70);
  
    EXPECT_EQ("1024x768", display_modes[2].size().ToString());
    EXPECT_TRUE(display_modes[2].is_interlaced());
    EXPECT_EQ(display_modes[2].refresh_rate(), 70);
  
    EXPECT_EQ("1280x720", display_modes[3].size().ToString());
    EXPECT_FALSE(display_modes[3].is_interlaced());
    EXPECT_EQ(display_modes[3].refresh_rate(), 60);
  
    EXPECT_EQ("1920x1080", display_modes[4].size().ToString());
    EXPECT_FALSE(display_modes[4].is_interlaced());
    EXPECT_EQ(display_modes[4].refresh_rate(), 80);
  
    EXPECT_EQ("1920x1200", display_modes[5].size().ToString());
    EXPECT_FALSE(display_modes[5].is_interlaced());
    EXPECT_EQ(display_modes[5].refresh_rate(), 60);
  }
  
  TEST_F(DisplayChangeObserverTest, GetEmptyExternalManagedDisplayModeList) {
    FakeDisplaySnapshot display_snapshot(
        123, gfx::Point(), gfx::Size(), DISPLAY_CONNECTION_TYPE_UNKNOWN, false,
        false, false, std::string(), {}, nullptr, nullptr, 0, gfx::Size());
  
    ManagedDisplayInfo::ManagedDisplayModeList display_modes =
        DisplayChangeObserver::GetExternalManagedDisplayModeList(
            display_snapshot);
    EXPECT_EQ(0u, display_modes.size());
  }
  
  TEST_F(DisplayChangeObserverTest, GetInternalManagedDisplayModeList) {
    std::unique_ptr<DisplaySnapshot> display_snapshot =
        FakeDisplaySnapshot::Builder()
            .SetId(123)
            .SetNativeMode(MakeDisplayMode(1366, 768, false, 60))
            .AddMode(MakeDisplayMode(1024, 768, false, 60))
            .AddMode(MakeDisplayMode(800, 600, false, 60))
            .AddMode(MakeDisplayMode(600, 600, false, 56.2))
            .AddMode(MakeDisplayMode(640, 480, false, 59.9))
            .Build();
  
    ManagedDisplayInfo info(1, "", false);
    info.SetBounds(gfx::Rect(0, 0, 1366, 768));
  
    ManagedDisplayInfo::ManagedDisplayModeList display_modes =
        DisplayChangeObserver::GetInternalManagedDisplayModeList(
            info, *display_snapshot);
    ASSERT_EQ(5u, display_modes.size());
    EXPECT_EQ("1366x768", display_modes[0].size().ToString());
    EXPECT_FALSE(display_modes[0].native());
    EXPECT_NEAR(display_modes[0].ui_scale(), 0.5, 0.01);
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);
  
    EXPECT_EQ("1366x768", display_modes[1].size().ToString());
    EXPECT_FALSE(display_modes[1].native());
    EXPECT_NEAR(display_modes[1].ui_scale(), 0.6, 0.01);
    EXPECT_EQ(display_modes[1].refresh_rate(), 60);
  
    EXPECT_EQ("1366x768", display_modes[2].size().ToString());
    EXPECT_FALSE(display_modes[2].native());
    EXPECT_NEAR(display_modes[2].ui_scale(), 0.75, 0.01);
    EXPECT_EQ(display_modes[2].refresh_rate(), 60);
  
    EXPECT_EQ("1366x768", display_modes[3].size().ToString());
    EXPECT_TRUE(display_modes[3].native());
    EXPECT_NEAR(display_modes[3].ui_scale(), 1.0, 0.01);
    EXPECT_EQ(display_modes[3].refresh_rate(), 60);
  
    EXPECT_EQ("1366x768", display_modes[4].size().ToString());
    EXPECT_FALSE(display_modes[4].native());
    EXPECT_NEAR(display_modes[4].ui_scale(), 1.125, 0.01);
    EXPECT_EQ(display_modes[4].refresh_rate(), 60);
  }
  
  TEST_F(DisplayChangeObserverTest, GetInternalHiDPIManagedDisplayModeList) {
    // Data picked from peppy.
    std::unique_ptr<DisplaySnapshot> display_snapshot =
        FakeDisplaySnapshot::Builder()
            .SetId(123)
            .SetNativeMode(MakeDisplayMode(2560, 1700, false, 60))
            .AddMode(MakeDisplayMode(2048, 1536, false, 60))
            .AddMode(MakeDisplayMode(1920, 1440, false, 60))
            .Build();
  
    ManagedDisplayInfo info(1, "", false);
    info.SetBounds(gfx::Rect(0, 0, 2560, 1700));
    info.set_device_scale_factor(2.0f);
  
    ManagedDisplayInfo::ManagedDisplayModeList display_modes =
        DisplayChangeObserver::GetInternalManagedDisplayModeList(
            info, *display_snapshot);
    ASSERT_EQ(8u, display_modes.size());
    EXPECT_EQ("2560x1700", display_modes[0].size().ToString());
    EXPECT_FALSE(display_modes[0].native());
    EXPECT_NEAR(display_modes[0].ui_scale(), 0.5, 0.01);
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);
  
    EXPECT_EQ("2560x1700", display_modes[1].size().ToString());
    EXPECT_FALSE(display_modes[1].native());
    EXPECT_NEAR(display_modes[1].ui_scale(), 0.625, 0.01);
    EXPECT_EQ(display_modes[1].refresh_rate(), 60);
  
    EXPECT_EQ("2560x1700", display_modes[2].size().ToString());
    EXPECT_FALSE(display_modes[2].native());
    EXPECT_NEAR(display_modes[2].ui_scale(), 0.8, 0.01);
    EXPECT_EQ(display_modes[2].refresh_rate(), 60);
  
    EXPECT_EQ("2560x1700", display_modes[3].size().ToString());
    EXPECT_FALSE(display_modes[3].native());
    EXPECT_NEAR(display_modes[3].ui_scale(), 1.0, 0.01);
    EXPECT_EQ(display_modes[3].refresh_rate(), 60);
  
    EXPECT_EQ("2560x1700", display_modes[4].size().ToString());
    EXPECT_FALSE(display_modes[4].native());
    EXPECT_NEAR(display_modes[4].ui_scale(), 1.125, 0.01);
    EXPECT_EQ(display_modes[4].refresh_rate(), 60);
  
    EXPECT_EQ("2560x1700", display_modes[5].size().ToString());
    EXPECT_FALSE(display_modes[5].native());
    EXPECT_NEAR(display_modes[5].ui_scale(), 1.25, 0.01);
    EXPECT_EQ(display_modes[5].refresh_rate(), 60);
  
    EXPECT_EQ("2560x1700", display_modes[6].size().ToString());
    EXPECT_FALSE(display_modes[6].native());
    EXPECT_NEAR(display_modes[6].ui_scale(), 1.5, 0.01);
    EXPECT_EQ(display_modes[6].refresh_rate(), 60);
  
    EXPECT_EQ("2560x1700", display_modes[7].size().ToString());
    EXPECT_TRUE(display_modes[7].native());
    EXPECT_NEAR(display_modes[7].ui_scale(), 2.0, 0.01);
    EXPECT_EQ(display_modes[7].refresh_rate(), 60);
  }
  
  TEST_F(DisplayChangeObserverTest, GetInternalManagedDisplayModeList1_25) {
    // Data picked from peppy.
    std::unique_ptr<DisplaySnapshot> display_snapshot =
        FakeDisplaySnapshot::Builder()
            .SetId(123)
            .SetNativeMode(MakeDisplayMode(1920, 1080, false, 60))
            .Build();
  
    ManagedDisplayInfo info(1, "", false);
    info.SetBounds(gfx::Rect(0, 0, 1920, 1080));
    info.set_device_scale_factor(1.25);
  
    ManagedDisplayInfo::ManagedDisplayModeList display_modes =
        DisplayChangeObserver::GetInternalManagedDisplayModeList(
            info, *display_snapshot);
    ASSERT_EQ(5u, display_modes.size());
    EXPECT_EQ("1920x1080", display_modes[0].size().ToString());
    EXPECT_FALSE(display_modes[0].native());
    EXPECT_NEAR(display_modes[0].ui_scale(), 0.5, 0.01);
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);
  
    EXPECT_EQ("1920x1080", display_modes[1].size().ToString());
    EXPECT_FALSE(display_modes[1].native());
    EXPECT_NEAR(display_modes[1].ui_scale(), 0.625, 0.01);
    EXPECT_EQ(display_modes[1].refresh_rate(), 60);
  
    EXPECT_EQ("1920x1080", display_modes[2].size().ToString());
    EXPECT_FALSE(display_modes[2].native());
    EXPECT_NEAR(display_modes[2].ui_scale(), 0.8, 0.01);
    EXPECT_EQ(display_modes[2].refresh_rate(), 60);
  
    EXPECT_EQ("1920x1080", display_modes[3].size().ToString());
    EXPECT_TRUE(display_modes[3].native());
    EXPECT_NEAR(display_modes[3].ui_scale(), 1.0, 0.01);
    EXPECT_EQ(display_modes[3].refresh_rate(), 60);
  
    EXPECT_EQ("1920x1080", display_modes[4].size().ToString());
    EXPECT_FALSE(display_modes[4].native());
    EXPECT_NEAR(display_modes[4].ui_scale(), 1.25, 0.01);
    EXPECT_EQ(display_modes[4].refresh_rate(), 60);
  }
  
  TEST_F(DisplayChangeObserverTest, GetExternalManagedDisplayModeList4K) {
    std::unique_ptr<DisplaySnapshot> display_snapshot =
        FakeDisplaySnapshot::Builder()
            .SetId(123)
            .SetNativeMode(MakeDisplayMode(3840, 2160, false, 30))
            .AddMode(MakeDisplayMode(1920, 1200, false, 60))
            // All non-interlaced (as would be seen with different refresh rates).
            .AddMode(MakeDisplayMode(1920, 1080, false, 80))
            .AddMode(MakeDisplayMode(1920, 1080, false, 70))
            .AddMode(MakeDisplayMode(1920, 1080, false, 60))
            // Interlaced vs non-interlaced.
            .AddMode(MakeDisplayMode(1280, 720, true, 60))
            .AddMode(MakeDisplayMode(1280, 720, false, 60))
            // Interlaced only.
            .AddMode(MakeDisplayMode(1024, 768, true, 70))
            .AddMode(MakeDisplayMode(1024, 768, true, 60))
            // Mixed.
            .AddMode(MakeDisplayMode(1024, 600, true, 60))
            .AddMode(MakeDisplayMode(1024, 600, false, 70))
            .AddMode(MakeDisplayMode(1024, 600, false, 60))
            // Just one interlaced mode.
            .AddMode(MakeDisplayMode(640, 480, true, 60))
            .Build();
  
    ManagedDisplayInfo::ManagedDisplayModeList display_modes =
        DisplayChangeObserver::GetExternalManagedDisplayModeList(
            *display_snapshot);
    ManagedDisplayInfo info(1, "", false);
    info.SetManagedDisplayModes(display_modes);  // Sort as external display.
    display_modes = info.display_modes();
  
    ASSERT_EQ(9u, display_modes.size());
    EXPECT_EQ("640x480", display_modes[0].size().ToString());
    EXPECT_TRUE(display_modes[0].is_interlaced());
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);
  
    EXPECT_EQ("1024x600", display_modes[1].size().ToString());
    EXPECT_FALSE(display_modes[1].is_interlaced());
    EXPECT_EQ(display_modes[1].refresh_rate(), 70);
  
    EXPECT_EQ("1024x768", display_modes[2].size().ToString());
    EXPECT_TRUE(display_modes[2].is_interlaced());
    EXPECT_EQ(display_modes[2].refresh_rate(), 70);
  
    EXPECT_EQ("1280x720", display_modes[3].size().ToString());
    EXPECT_FALSE(display_modes[3].is_interlaced());
    EXPECT_EQ(display_modes[3].refresh_rate(), 60);
  
    EXPECT_EQ("1920x1080", display_modes[4].size().ToString());
    EXPECT_FALSE(display_modes[4].is_interlaced());
    EXPECT_EQ(display_modes[4].refresh_rate(), 80);
  
    EXPECT_EQ("3840x2160", display_modes[5].size().ToString());
    EXPECT_FALSE(display_modes[5].is_interlaced());
    EXPECT_FALSE(display_modes[5].native());
    EXPECT_EQ(display_modes[5].refresh_rate(), 30);
    EXPECT_EQ(display_modes[5].device_scale_factor(), 2.0);
  
    EXPECT_EQ("1920x1200", display_modes[6].size().ToString());
    EXPECT_FALSE(display_modes[6].is_interlaced());
    EXPECT_EQ(display_modes[6].refresh_rate(), 60);
  
    EXPECT_EQ("3840x2160", display_modes[7].size().ToString());
    EXPECT_FALSE(display_modes[7].is_interlaced());
    EXPECT_FALSE(display_modes[7].native());
    EXPECT_EQ(display_modes[7].refresh_rate(), 30);
    EXPECT_EQ(display_modes[7].device_scale_factor(), 1.25);
  
    EXPECT_EQ("3840x2160", display_modes[8].size().ToString());
    EXPECT_FALSE(display_modes[8].is_interlaced());
    EXPECT_TRUE(display_modes[8].native());
    EXPECT_EQ(display_modes[8].refresh_rate(), 30);
  }
  
  TEST_F(DisplayChangeObserverTest, FindDeviceScaleFactor) {
    EXPECT_EQ(1.0f, ComputeDeviceScaleFactor(19.5f, gfx::Rect(1600, 900)));
  
    // 21.5" 1920x1080
    EXPECT_EQ(1.0f, ComputeDeviceScaleFactor(21.5f, gfx::Rect(1920, 1080)));
  
    // 12.1" 1280x800
    EXPECT_EQ(1.0f, ComputeDeviceScaleFactor(12.1f, gfx::Rect(1280, 800)));
  
    // 13.3" 1920x1080
    EXPECT_EQ(1.25f, ComputeDeviceScaleFactor(13.3f, gfx::Rect(1920, 1080)));
  
    // 14" 1920x1080
    EXPECT_EQ(1.25f, ComputeDeviceScaleFactor(14.0f, gfx::Rect(1920, 1080)));
  
    // 11.6" 1920x1080
    EXPECT_EQ(1.6f, ComputeDeviceScaleFactor(11.6f, gfx::Rect(1920, 1080)));
  
    // 12.02" 2160x1440
    EXPECT_EQ(1.6f, ComputeDeviceScaleFactor(12.02f, gfx::Rect(2160, 1440)));
  
    // 12.85" 2560x1700
    EXPECT_EQ(2.0f, ComputeDeviceScaleFactor(12.85f, gfx::Rect(2560, 1700)));
  
    // 12.3" 2400x1600
    EXPECT_EQ(2.0f, ComputeDeviceScaleFactor(12.3f, gfx::Rect(2400, 1600)));
  
    // Erroneous values should still work.
    EXPECT_EQ(1.0f, DisplayChangeObserver::FindDeviceScaleFactor(-100.0f));
    EXPECT_EQ(1.0f, DisplayChangeObserver::FindDeviceScaleFactor(0.0f));
    EXPECT_EQ(2.0f, DisplayChangeObserver::FindDeviceScaleFactor(10000.0f));
  }
  
  TEST_F(DisplayChangeObserverTest,
         FindExternalDisplayNativeModeWhenOverwritten) {
    std::unique_ptr<DisplaySnapshot> display_snapshot =
        FakeDisplaySnapshot::Builder()
            .SetId(123)
            .SetNativeMode(MakeDisplayMode(1920, 1080, true, 60))
            .AddMode(MakeDisplayMode(1920, 1080, false, 60))
            .Build();
  
    ManagedDisplayInfo::ManagedDisplayModeList display_modes =
        DisplayChangeObserver::GetExternalManagedDisplayModeList(
            *display_snapshot);
    ASSERT_EQ(2u, display_modes.size());
    EXPECT_EQ("1920x1080", display_modes[0].size().ToString());
    EXPECT_FALSE(display_modes[0].is_interlaced());
    EXPECT_FALSE(display_modes[0].native());
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);
  
    EXPECT_EQ("1920x1080", display_modes[1].size().ToString());
    EXPECT_TRUE(display_modes[1].is_interlaced());
    EXPECT_TRUE(display_modes[1].native());
    EXPECT_EQ(display_modes[1].refresh_rate(), 60);
  }
  
  }  // namespace display
  