// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/wm/core/visibility_controller.h"

#include "base/test/run_until.h"
#include "ui/aura/test/aura_test_base.h"
#include "ui/aura/test/test_window_delegate.h"
#include "ui/aura/test/test_windows.h"
#include "ui/aura/window.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animator.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/gfx/scoped_animation_duration_scale_mode.h"
#include "ui/wm/core/window_animations.h"

namespace wm {

typedef aura::test::AuraTestBase VisibilityControllerTest;

// Check that a transparency change to 0 will not cause a hide call to be
// ignored.
TEST_F(VisibilityControllerTest, AnimateTransparencyToZeroAndHideHides) {
  // We cannot disable animations for this test.
  gfx::ScopedAnimationDurationScaleMode test_duration_mode(
      gfx::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION);

  VisibilityController controller;
  aura::client::SetVisibilityClient(root_window(), &controller);

  SetChildWindowVisibilityChangesAnimated(root_window());

  aura::test::TestWindowDelegate d;
  std::unique_ptr<aura::Window> window =
      aura::test::CreateTestWindow({.delegate = &d,
                                    .parent = root_window(),
                                    .bounds = {0, 0, 50, 50},
                                    .window_id = -2});
  EXPECT_TRUE(window->layer()->visible());
  EXPECT_TRUE(window->IsVisible());
  EXPECT_EQ(1.0, window->layer()->GetTargetOpacity());
  EXPECT_TRUE(window->layer()->GetAnimator()->IsAnimatingProperty(
      ui::LayerAnimationElement::OPACITY));
  {
    ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
    settings.SetTransitionDuration(base::Milliseconds(5));
    settings.SetPreemptionStrategy(
        ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);

    EXPECT_TRUE(window->layer()->visible());
    EXPECT_TRUE(window->IsVisible());
    window->layer()->SetOpacity(0.0);
  }
  EXPECT_EQ(0.0f, window->layer()->GetTargetOpacity());
  EXPECT_TRUE(window->layer()->visible());
  EXPECT_TRUE(window->IsVisible());
  EXPECT_TRUE(window->layer()->GetAnimator()->
      IsAnimatingProperty(ui::LayerAnimationElement::OPACITY));

  // Check that the visibility is correct after the hide animation has finished.
  window->Hide();
  window->layer()->GetAnimator()->StopAnimating();
  EXPECT_FALSE(window->layer()->visible());
  EXPECT_FALSE(window->IsVisible());
}

// Check that a hiding animation would not change a window's bounds in screen.
TEST_F(VisibilityControllerTest, HideAnimationWindowBoundsTest) {
  // We cannot disable animations for this test.
  gfx::ScopedAnimationDurationScaleMode test_duration_mode(
      gfx::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION);

  VisibilityController controller;
  aura::client::SetVisibilityClient(root_window(), &controller);

  // Set bound expectation.
  gfx::Rect expected_bounds(4, 5, 123, 245);
  aura::test::TestWindowDelegate d;
  std::unique_ptr<aura::Window> window =
      aura::test::CreateTestWindow({.delegate = &d,
                                    .parent = root_window(),
                                    .bounds = expected_bounds,
                                    .window_id = -2});
  window->Show();
  SetWindowVisibilityChangesAnimated(window.get());
  SetWindowVisibilityAnimationDuration(window.get(), base::Milliseconds(5));
  SetWindowVisibilityAnimationType(window.get(),
                                   WINDOW_VISIBILITY_ANIMATION_TYPE_DROP);
  // Check that the bound is correct after the hide animation has finished.
  window->Hide();
  window->layer()->GetAnimator()->StopAnimating();
  EXPECT_EQ(expected_bounds, window->GetBoundsInScreen());
}

// Test if SetWindowVisibilityChagngesAnimated will animate the specified
// window.
TEST_F(VisibilityControllerTest, SetWindowVisibilityChagnesAnimated) {
  // We cannot disable animations for this test.
  gfx::ScopedAnimationDurationScaleMode test_duration_mode(
      gfx::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION);

  VisibilityController controller;
  aura::client::SetVisibilityClient(root_window(), &controller);

  aura::test::TestWindowDelegate d;
  std::unique_ptr<aura::Window> window =
      aura::test::CreateTestWindow({.delegate = &d,
                                    .parent = root_window(),
                                    .bounds = {0, 0, 50, 50},
                                    .window_id = -2});
  // Test using Show animation because Hide animation detaches the window's
  // layer.
  window->Hide();
  ASSERT_FALSE(window->IsVisible());

  SetWindowVisibilityChangesAnimated(window.get());
  SetWindowVisibilityAnimationDuration(window.get(), base::Milliseconds(5));
  SetWindowVisibilityAnimationType(window.get(),
                                   WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
  window->Show();
  EXPECT_TRUE(window->layer()->GetAnimator()->is_animating());
  EXPECT_EQ(1.0f, window->layer()->GetTargetOpacity());
  EXPECT_EQ(0.0f, window->layer()->opacity());

  window->layer()->GetAnimator()->StopAnimating();
  EXPECT_EQ(1.0f, window->layer()->GetTargetOpacity());
  EXPECT_EQ(1.0f, window->layer()->opacity());
}

}  // namespace wm