wm/overview/window_selector_unittest.cc

// 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 "ash/launcher/launcher.h"
#include "ash/root_window_controller.h"
#include "ash/screen_ash.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/test/ash_test_base.h"
#include "ash/test/launcher_test_api.h"
#include "ash/test/shelf_view_test_api.h"
#include "ash/test/shell_test_api.h"
#include "ash/test/test_shelf_delegate.h"
#include "ash/wm/mru_window_tracker.h"
#include "ash/wm/overview/window_selector.h"
#include "ash/wm/overview/window_selector_controller.h"
#include "ash/wm/window_state.h"
#include "ash/wm/window_util.h"
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_vector.h"
#include "base/run_loop.h"
#include "ui/aura/client/activation_delegate.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/client/cursor_client.h"
#include "ui/aura/client/focus_client.h"
#include "ui/aura/root_window.h"
#include "ui/aura/test/event_generator.h"
#include "ui/aura/test/test_window_delegate.h"
#include "ui/aura/test/test_windows.h"
#include "ui/aura/window.h"
#include "ui/compositor/scoped_animation_duration_scale_mode.h"
#include "ui/gfx/rect_conversions.h"
#include "ui/gfx/transform.h"

namespace ash {
namespace internal {

namespace {

class NonActivatableActivationDelegate
    : public aura::client::ActivationDelegate {
 public:
  virtual bool ShouldActivate() const OVERRIDE {
    return false;
  }
};

bool IsWindowAbove(aura::Window* w1, aura::Window* w2) {
  aura::Window* parent = w1->parent();
  DCHECK_EQ(parent, w2->parent());
  for (aura::Window::Windows::const_iterator iter = parent->children().begin();
       iter != parent->children().end(); ++iter) {
    if (*iter == w1)
      return false;
    if (*iter == w2)
      return true;
  }
  NOTREACHED();
  return false;
}

aura::Window* GetWindowByName(aura::Window* container,
                              const std::string& name) {
  aura::Window* window = NULL;
  for (aura::Window::Windows::const_iterator iter =
       container->children().begin(); iter != container->children().end();
       ++iter) {
    if ((*iter)->name() == name) {
      // The name should be unique.
      DCHECK(!window);
      window = *iter;
    }
  }
  return window;
}

// Returns the copy of |window| created for overview. It is found using the
// window name which should be the same as the source window's name with a
// special suffix, and in the same container as the source window.
aura::Window* GetCopyWindow(aura::Window* window) {
  aura::Window* copy_window = NULL;
  std::string copy_name = window->name() + " (Copy)";
  std::vector<aura::Window*> containers(
      Shell::GetContainersFromAllRootWindows(window->parent()->id(), NULL));
  for (std::vector<aura::Window*>::iterator iter = containers.begin();
       iter != containers.end(); ++iter) {
    aura::Window* found = GetWindowByName(*iter, copy_name);
    if (found) {
      // There should only be one copy window.
      DCHECK(!copy_window);
      copy_window = found;
    }
  }
  return copy_window;
}

}  // namespace

class WindowSelectorTest : public test::AshTestBase {
 public:
  WindowSelectorTest() {}
  virtual ~WindowSelectorTest() {}

  virtual void SetUp() OVERRIDE {
    test::AshTestBase::SetUp();
    ASSERT_TRUE(test::TestShelfDelegate::instance());

    shelf_view_test_.reset(new test::ShelfViewTestAPI(
        test::LauncherTestAPI(Launcher::ForPrimaryDisplay()).shelf_view()));
    shelf_view_test_->SetAnimationDuration(1);
  }

  aura::Window* CreateWindow(const gfx::Rect& bounds) {
    return CreateTestWindowInShellWithDelegate(&delegate_, -1, bounds);
  }

  aura::Window* CreateNonActivatableWindow(const gfx::Rect& bounds) {
    aura::Window* window = CreateWindow(bounds);
    aura::client::SetActivationDelegate(window,
                                        &non_activatable_activation_delegate_);
    EXPECT_FALSE(ash::wm::CanActivateWindow(window));
    return window;
  }

  aura::Window* CreatePanelWindow(const gfx::Rect& bounds) {
    aura::Window* window = CreateTestWindowInShellWithDelegateAndType(
        NULL, aura::client::WINDOW_TYPE_PANEL, 0, bounds);
    test::TestShelfDelegate::instance()->AddLauncherItem(window);
    shelf_view_test()->RunMessageLoopUntilAnimationsDone();
    return window;
  }

  bool WindowsOverlapping(aura::Window* window1, aura::Window* window2) {
    gfx::RectF window1_bounds = GetTransformedTargetBounds(window1);
    gfx::RectF window2_bounds = GetTransformedTargetBounds(window2);
    return window1_bounds.Intersects(window2_bounds);
  }

  void ToggleOverview() {
    ash::Shell::GetInstance()->window_selector_controller()->ToggleOverview();
  }

  void Cycle(WindowSelector::Direction direction) {
    ash::Shell::GetInstance()->window_selector_controller()->
        HandleCycleWindow(direction);
  }

  void StopCycling() {
    ash::Shell::GetInstance()->window_selector_controller()->window_selector_->
        SelectWindow();
  }

  void FireOverviewStartTimer() {
    // Calls the method to start overview mode which is normally called by the
    // timer. The timer will still fire and call this method triggering the
    // DCHECK that overview mode was not already started, except that we call
    // StopCycling before the timer has a chance to fire.
    ash::Shell::GetInstance()->window_selector_controller()->window_selector_->
        StartOverview();
  }

  gfx::Transform GetTransformRelativeTo(gfx::PointF origin,
                                        const gfx::Transform& transform) {
    gfx::Transform t;
    t.Translate(origin.x(), origin.y());
    t.PreconcatTransform(transform);
    t.Translate(-origin.x(), -origin.y());
    return t;
  }

  gfx::RectF GetTransformedBounds(aura::Window* window) {
    gfx::RectF bounds(ash::ScreenAsh::ConvertRectToScreen(
        window->parent(), window->layer()->bounds()));
    gfx::Transform transform(GetTransformRelativeTo(bounds.origin(),
        window->layer()->transform()));
    transform.TransformRect(&bounds);
    return bounds;
  }

  gfx::RectF GetTransformedTargetBounds(aura::Window* window) {
    gfx::RectF bounds(ash::ScreenAsh::ConvertRectToScreen(
        window->parent(), window->layer()->GetTargetBounds()));
    gfx::Transform transform(GetTransformRelativeTo(bounds.origin(),
        window->layer()->GetTargetTransform()));
    transform.TransformRect(&bounds);
    return bounds;
  }

  void ClickWindow(aura::Window* window) {
    aura::test::EventGenerator event_generator(window->GetRootWindow(), window);
    gfx::RectF target = GetTransformedBounds(window);
    event_generator.ClickLeftButton();
  }

  bool IsSelecting() {
    return ash::Shell::GetInstance()->window_selector_controller()->
        IsSelecting();
  }

  aura::Window* GetFocusedWindow() {
    return aura::client::GetFocusClient(
        Shell::GetPrimaryRootWindow())->GetFocusedWindow();
  }

  test::ShelfViewTestAPI* shelf_view_test() {
    return shelf_view_test_.get();
  }

 private:
  aura::test::TestWindowDelegate delegate_;
  NonActivatableActivationDelegate non_activatable_activation_delegate_;
  scoped_ptr<test::ShelfViewTestAPI> shelf_view_test_;

  DISALLOW_COPY_AND_ASSIGN(WindowSelectorTest);
};

// Tests entering overview mode with two windows and selecting one.
TEST_F(WindowSelectorTest, Basic) {
  gfx::Rect bounds(0, 0, 400, 400);
  aura::Window* root_window = Shell::GetPrimaryRootWindow();
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> panel1(CreatePanelWindow(bounds));
  scoped_ptr<aura::Window> panel2(CreatePanelWindow(bounds));
  EXPECT_TRUE(WindowsOverlapping(window1.get(), window2.get()));
  EXPECT_TRUE(WindowsOverlapping(panel1.get(), panel2.get()));
  wm::ActivateWindow(window2.get());
  EXPECT_FALSE(wm::IsActiveWindow(window1.get()));
  EXPECT_TRUE(wm::IsActiveWindow(window2.get()));
  EXPECT_EQ(window2.get(), GetFocusedWindow());
  // Hide the cursor before entering overview to test that it will be shown.
  aura::client::GetCursorClient(root_window)->HideCursor();

  // In overview mode the windows should no longer overlap and focus should
  // be removed from the window.
  ToggleOverview();
  EXPECT_EQ(NULL, GetFocusedWindow());
  EXPECT_FALSE(WindowsOverlapping(window1.get(), window2.get()));
  EXPECT_FALSE(WindowsOverlapping(window1.get(), panel1.get()));
  // Panels 1 and 2 should still be overlapping being in a single selector
  // item.
  EXPECT_TRUE(WindowsOverlapping(panel1.get(), panel2.get()));

  // The cursor should be visible and locked as a pointer
  EXPECT_EQ(ui::kCursorPointer,
            root_window->GetDispatcher()->last_cursor().native_type());
  EXPECT_TRUE(aura::client::GetCursorClient(root_window)->IsCursorLocked());
  EXPECT_TRUE(aura::client::GetCursorClient(root_window)->IsCursorVisible());

  // Clicking window 1 should activate it.
  ClickWindow(window1.get());
  EXPECT_TRUE(wm::IsActiveWindow(window1.get()));
  EXPECT_FALSE(wm::IsActiveWindow(window2.get()));
  EXPECT_EQ(window1.get(), GetFocusedWindow());

  // Cursor should have been unlocked.
  EXPECT_FALSE(aura::client::GetCursorClient(root_window)->IsCursorLocked());
}

// Tests entering overview mode with two windows and selecting one.
TEST_F(WindowSelectorTest, FullscreenWindow) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> panel1(CreatePanelWindow(bounds));
  wm::ActivateWindow(window1.get());

  wm::GetWindowState(window1.get())->ToggleFullscreen();
  // The panel is hidden in fullscreen mode.
  EXPECT_FALSE(panel1->IsVisible());
  EXPECT_TRUE(wm::GetWindowState(window1.get())->IsFullscreen());

  // Enter overview and select the fullscreen window.
  ToggleOverview();

  // The panel becomes temporarily visible for the overview.
  EXPECT_TRUE(panel1->IsVisible());
  ClickWindow(window1.get());

  // The window is still fullscreen as it was selected. The panel should again
  // be hidden.
  EXPECT_TRUE(wm::GetWindowState(window1.get())->IsFullscreen());
  EXPECT_FALSE(panel1->IsVisible());

  // Entering overview and selecting another window, the previous window remains
  // fullscreen.
  // TODO(flackr): Currently the panel remains hidden, but should become visible
  // again.
  ToggleOverview();
  ClickWindow(window2.get());
  EXPECT_TRUE(wm::GetWindowState(window1.get())->IsFullscreen());
}

// Tests that the shelf dimming state is removed while in overview and restored
// on exiting overview.
TEST_F(WindowSelectorTest, OverviewUndimsShelf) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  wm::WindowState* window_state = wm::GetWindowState(window1.get());
  window_state->Maximize();
  ash::ShelfWidget* shelf = Shell::GetPrimaryRootWindowController()->shelf();
  EXPECT_TRUE(shelf->GetDimsShelf());
  ToggleOverview();
  EXPECT_FALSE(shelf->GetDimsShelf());
  ToggleOverview();
  EXPECT_TRUE(shelf->GetDimsShelf());
}

// Tests that beginning window selection hides the app list.
TEST_F(WindowSelectorTest, SelectingHidesAppList) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  Shell::GetInstance()->ToggleAppList(NULL);
  EXPECT_TRUE(Shell::GetInstance()->GetAppListTargetVisibility());
  ToggleOverview();
  EXPECT_FALSE(Shell::GetInstance()->GetAppListTargetVisibility());
  ToggleOverview();

  // The app list uses an animation to fade out. If it is toggled on immediately
  // after being removed the old widget is re-used and it does not gain focus.
  // When running under normal circumstances this shouldn't be possible, but
  // it is in a test without letting the message loop run.
  RunAllPendingInMessageLoop();

  Shell::GetInstance()->ToggleAppList(NULL);
  EXPECT_TRUE(Shell::GetInstance()->GetAppListTargetVisibility());
  Cycle(WindowSelector::FORWARD);
  EXPECT_FALSE(Shell::GetInstance()->GetAppListTargetVisibility());
  StopCycling();
}

// Tests that a minimized window's visibility and layer visibility is correctly
// changed when entering overview and restored when leaving overview mode.
TEST_F(WindowSelectorTest, MinimizedWindowVisibility) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  wm::WindowState* window_state = wm::GetWindowState(window1.get());
  window_state->Minimize();
  EXPECT_FALSE(window1->IsVisible());
  EXPECT_FALSE(window1->layer()->GetTargetVisibility());
  {
    ui::ScopedAnimationDurationScaleMode normal_duration_mode(
        ui::ScopedAnimationDurationScaleMode::NORMAL_DURATION);
    ToggleOverview();
    EXPECT_TRUE(window1->IsVisible());
    EXPECT_TRUE(window1->layer()->GetTargetVisibility());
  }
  {
    ui::ScopedAnimationDurationScaleMode normal_duration_mode(
        ui::ScopedAnimationDurationScaleMode::NORMAL_DURATION);
    ToggleOverview();
    EXPECT_FALSE(window1->IsVisible());
    EXPECT_FALSE(window1->layer()->GetTargetVisibility());
  }
}

// Tests that a bounds change during overview is corrected for.
TEST_F(WindowSelectorTest, BoundsChangeDuringOverview) {
  scoped_ptr<aura::Window> window(CreateWindow(gfx::Rect(0, 0, 400, 400)));
  ToggleOverview();
  gfx::Rect overview_bounds =
      ToEnclosingRect(GetTransformedTargetBounds(window.get()));
  window->SetBounds(gfx::Rect(200, 0, 200, 200));
  gfx::Rect new_overview_bounds =
      ToEnclosingRect(GetTransformedTargetBounds(window.get()));
  EXPECT_EQ(overview_bounds.x(), new_overview_bounds.x());
  EXPECT_EQ(overview_bounds.y(), new_overview_bounds.y());
  EXPECT_EQ(overview_bounds.width(), new_overview_bounds.width());
  EXPECT_EQ(overview_bounds.height(), new_overview_bounds.height());
  ToggleOverview();
}

// Tests entering overview mode with three windows and cycling through them.
TEST_F(WindowSelectorTest, BasicCycle) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> window3(CreateWindow(bounds));
  wm::ActivateWindow(window3.get());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());
  EXPECT_TRUE(wm::IsActiveWindow(window1.get()));
  EXPECT_FALSE(wm::IsActiveWindow(window2.get()));
  EXPECT_FALSE(wm::IsActiveWindow(window3.get()));

  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(IsSelecting());
  EXPECT_TRUE(wm::IsActiveWindow(window2.get()));

  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(wm::IsActiveWindow(window3.get()));

  StopCycling();
  EXPECT_FALSE(IsSelecting());
  EXPECT_FALSE(wm::IsActiveWindow(window1.get()));
  EXPECT_FALSE(wm::IsActiveWindow(window2.get()));
  EXPECT_TRUE(wm::IsActiveWindow(window3.get()));
}

// Tests that cycling through windows preserves the window stacking order.
TEST_F(WindowSelectorTest, CyclePreservesStackingOrder) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> window3(CreateWindow(bounds));
  wm::ActivateWindow(window3.get());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());
  // Window order from top to bottom is 1, 2, 3.
  EXPECT_TRUE(IsWindowAbove(window1.get(), window2.get()));
  EXPECT_TRUE(IsWindowAbove(window2.get(), window3.get()));

  // On window 2.
  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(IsWindowAbove(window2.get(), window1.get()));
  EXPECT_TRUE(IsWindowAbove(window1.get(), window3.get()));

  // On window 3.
  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(IsWindowAbove(window3.get(), window1.get()));
  EXPECT_TRUE(IsWindowAbove(window1.get(), window2.get()));

  // Back on window 1.
  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(IsWindowAbove(window1.get(), window2.get()));
  EXPECT_TRUE(IsWindowAbove(window2.get(), window3.get()));
  StopCycling();
}

// Tests that cycling through windows shows and minimizes windows as they
// are passed.
TEST_F(WindowSelectorTest, CyclePreservesMinimization) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  wm::ActivateWindow(window2.get());
  wm::GetWindowState(window2.get())->Minimize();
  wm::ActivateWindow(window1.get());
  EXPECT_TRUE(wm::IsWindowMinimized(window2.get()));

  // On window 2.
  Cycle(WindowSelector::FORWARD);
  EXPECT_FALSE(wm::IsWindowMinimized(window2.get()));

  // Back on window 1.
  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(wm::IsWindowMinimized(window2.get()));

  StopCycling();
  EXPECT_TRUE(wm::IsWindowMinimized(window2.get()));
}

// Tests beginning cycling while in overview mode.
TEST_F(WindowSelectorTest, OverviewTransitionToCycle) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());

  ToggleOverview();
  Cycle(WindowSelector::FORWARD);
  StopCycling();

  EXPECT_TRUE(wm::IsActiveWindow(window2.get()));
  EXPECT_FALSE(wm::IsActiveWindow(window1.get()));
  EXPECT_EQ(window2.get(), GetFocusedWindow());
}

// Tests cycles between panel and normal windows.
TEST_F(WindowSelectorTest, CyclePanels) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> panel1(CreatePanelWindow(bounds));
  scoped_ptr<aura::Window> panel2(CreatePanelWindow(bounds));
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());
  wm::ActivateWindow(panel2.get());
  wm::ActivateWindow(panel1.get());
  EXPECT_TRUE(wm::IsActiveWindow(panel1.get()));

  // Cycling once should select window1 since the panels are grouped into a
  // single selectable item.
  Cycle(WindowSelector::FORWARD);
  StopCycling();
  EXPECT_TRUE(wm::IsActiveWindow(window1.get()));

  // Cycling again should select the most recently used panel.
  Cycle(WindowSelector::FORWARD);
  StopCycling();
  EXPECT_TRUE(wm::IsActiveWindow(panel1.get()));
}

// Tests the visibility of panel windows during cycling.
TEST_F(WindowSelectorTest, CyclePanelVisibility) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> panel1(CreatePanelWindow(bounds));
  wm::ActivateWindow(panel1.get());
  wm::ActivateWindow(window1.get());

  Cycle(WindowSelector::FORWARD);
  FireOverviewStartTimer();
  EXPECT_EQ(1.0f, panel1->layer()->GetTargetOpacity());
  StopCycling();
}

// Tests cycles between panel and normal windows.
TEST_F(WindowSelectorTest, CyclePanelsDestroyed) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> window3(CreateWindow(bounds));
  scoped_ptr<aura::Window> panel1(CreatePanelWindow(bounds));
  scoped_ptr<aura::Window> panel2(CreatePanelWindow(bounds));
  wm::ActivateWindow(window3.get());
  wm::ActivateWindow(panel2.get());
  wm::ActivateWindow(panel1.get());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());
  EXPECT_TRUE(wm::IsActiveWindow(window1.get()));

  // Cycling once highlights window2.
  Cycle(WindowSelector::FORWARD);
  // All panels are destroyed.
  panel1.reset();
  panel2.reset();
  // Cycling again should now select window3.
  Cycle(WindowSelector::FORWARD);
  StopCycling();
  EXPECT_TRUE(wm::IsActiveWindow(window3.get()));
}

// Tests cycles between panel and normal windows.
TEST_F(WindowSelectorTest, CycleMruPanelDestroyed) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> panel1(CreatePanelWindow(bounds));
  scoped_ptr<aura::Window> panel2(CreatePanelWindow(bounds));
  wm::ActivateWindow(panel2.get());
  wm::ActivateWindow(panel1.get());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());
  EXPECT_TRUE(wm::IsActiveWindow(window1.get()));

  // Cycling once highlights window2.
  Cycle(WindowSelector::FORWARD);
  // Panel 1 is the next item as the MRU panel, removing it should make panel 2
  // the next window to be selected.
  panel1.reset();
  // Cycling again should now select window3.
  Cycle(WindowSelector::FORWARD);
  StopCycling();
  EXPECT_TRUE(wm::IsActiveWindow(panel2.get()));
}

// Tests that a newly created window aborts overview.
TEST_F(WindowSelectorTest, NewWindowCancelsOveriew) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  ToggleOverview();
  EXPECT_TRUE(IsSelecting());

  // A window being created should exit overview mode.
  scoped_ptr<aura::Window> window3(CreateWindow(bounds));
  EXPECT_FALSE(IsSelecting());
}

// Tests that a window activation exits overview mode.
TEST_F(WindowSelectorTest, ActivationCancelsOveriew) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  window2->Focus();
  ToggleOverview();
  EXPECT_TRUE(IsSelecting());

  // A window being activated should exit overview mode.
  window1->Focus();
  EXPECT_FALSE(IsSelecting());

  // window1 should be focused after exiting even though window2 was focused on
  // entering overview because we exited due to an activation.
  EXPECT_EQ(window1.get(), GetFocusedWindow());
}

// Verifies that overview mode only begins after a delay when cycling.
TEST_F(WindowSelectorTest, CycleOverviewDelay) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  EXPECT_TRUE(WindowsOverlapping(window1.get(), window2.get()));

  // When cycling first starts, the windows will still be overlapping.
  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(IsSelecting());
  EXPECT_TRUE(WindowsOverlapping(window1.get(), window2.get()));

  // Once the overview timer fires, the windows should no longer overlap.
  FireOverviewStartTimer();
  EXPECT_FALSE(WindowsOverlapping(window1.get(), window2.get()));
  StopCycling();
}

// Tests that exiting overview mode without selecting a window restores focus
// to the previously focused window.
TEST_F(WindowSelectorTest, CancelRestoresFocus) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window(CreateWindow(bounds));
  wm::ActivateWindow(window.get());
  EXPECT_EQ(window.get(), GetFocusedWindow());

  // In overview mode, focus should be removed.
  ToggleOverview();
  EXPECT_EQ(NULL, GetFocusedWindow());

  // If canceling overview mode, focus should be restored.
  ToggleOverview();
  EXPECT_EQ(window.get(), GetFocusedWindow());
}

// Tests that overview mode is exited if the last remaining window is destroyed.
TEST_F(WindowSelectorTest, LastWindowDestroyed) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  ToggleOverview();

  window1.reset();
  window2.reset();
  EXPECT_FALSE(IsSelecting());
}

// Tests that entering overview mode restores a window to its original
// target location.
TEST_F(WindowSelectorTest, QuickReentryRestoresInitialTransform) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window(CreateWindow(bounds));
  gfx::Rect initial_bounds = ToEnclosingRect(
      GetTransformedBounds(window.get()));
  ToggleOverview();
  // Quickly exit and reenter overview mode. The window should still be
  // animating when we reenter. We cannot short circuit animations for this but
  // we also don't have to wait for them to complete.
  {
    ui::ScopedAnimationDurationScaleMode normal_duration_mode(
        ui::ScopedAnimationDurationScaleMode::NORMAL_DURATION);
    ToggleOverview();
    ToggleOverview();
  }
  EXPECT_NE(initial_bounds, ToEnclosingRect(
      GetTransformedTargetBounds(window.get())));
  ToggleOverview();
  EXPECT_FALSE(IsSelecting());
  EXPECT_EQ(initial_bounds, ToEnclosingRect(
      GetTransformedTargetBounds(window.get())));
}

// Tests that non-activatable windows are hidden when entering overview mode.
TEST_F(WindowSelectorTest, NonActivatableWindowsHidden) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
  scoped_ptr<aura::Window> non_activatable_window(
      CreateNonActivatableWindow(Shell::GetPrimaryRootWindow()->bounds()));
  EXPECT_TRUE(non_activatable_window->IsVisible());
  ToggleOverview();
  EXPECT_FALSE(non_activatable_window->IsVisible());
  ToggleOverview();
  EXPECT_TRUE(non_activatable_window->IsVisible());

  // Test that a window behind the fullscreen non-activatable window can be
  // clicked.
  non_activatable_window->parent()->StackChildAtTop(
      non_activatable_window.get());
  ToggleOverview();
  ClickWindow(window1.get());
  EXPECT_FALSE(IsSelecting());
  EXPECT_TRUE(wm::IsActiveWindow(window1.get()));
}

// Tests that windows with modal child windows are transformed with the modal
// child even though not activatable themselves.
TEST_F(WindowSelectorTest, ModalChild) {
  gfx::Rect bounds(0, 0, 400, 400);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
  scoped_ptr<aura::Window> child1(CreateWindow(bounds));
  child1->SetProperty(aura::client::kModalKey, ui::MODAL_TYPE_WINDOW);
  window1->AddTransientChild(child1.get());
  EXPECT_EQ(window1->parent(), child1->parent());
  ToggleOverview();
  EXPECT_TRUE(window1->IsVisible());
  EXPECT_TRUE(child1->IsVisible());
  EXPECT_EQ(ToEnclosingRect(GetTransformedTargetBounds(child1.get())),
      ToEnclosingRect(GetTransformedTargetBounds(window1.get())));
  ToggleOverview();
}

// Tests that clicking a modal window's parent activates the modal window in
// overview.
TEST_F(WindowSelectorTest, ClickModalWindowParent) {
  scoped_ptr<aura::Window> window1(CreateWindow(gfx::Rect(0, 0, 180, 180)));
  scoped_ptr<aura::Window> child1(CreateWindow(gfx::Rect(200, 0, 180, 180)));
  child1->SetProperty(aura::client::kModalKey, ui::MODAL_TYPE_WINDOW);
  window1->AddTransientChild(child1.get());
  EXPECT_FALSE(WindowsOverlapping(window1.get(), child1.get()));
  EXPECT_EQ(window1->parent(), child1->parent());
  ToggleOverview();
  // Given that their relative positions are preserved, the windows should still
  // not overlap.
  EXPECT_FALSE(WindowsOverlapping(window1.get(), child1.get()));
  ClickWindow(window1.get());
  EXPECT_FALSE(IsSelecting());

  // Clicking on window1 should activate child1.
  EXPECT_TRUE(wm::IsActiveWindow(child1.get()));
}

// Tests that windows remain on the display they are currently on in overview
// mode.
TEST_F(WindowSelectorTest, MultipleDisplays) {
  if (!SupportsMultipleDisplays())
    return;

  UpdateDisplay("600x400,600x400");
  aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  gfx::Rect bounds1(0, 0, 400, 400);
  gfx::Rect bounds2(650, 0, 400, 400);

  scoped_ptr<aura::Window> window1(CreateWindow(bounds1));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds1));
  scoped_ptr<aura::Window> window3(CreateWindow(bounds2));
  scoped_ptr<aura::Window> window4(CreateWindow(bounds2));
  scoped_ptr<aura::Window> panel1(CreatePanelWindow(bounds1));
  scoped_ptr<aura::Window> panel2(CreatePanelWindow(bounds1));
  scoped_ptr<aura::Window> panel3(CreatePanelWindow(bounds2));
  scoped_ptr<aura::Window> panel4(CreatePanelWindow(bounds2));
  EXPECT_EQ(root_windows[0], window1->GetRootWindow());
  EXPECT_EQ(root_windows[0], window2->GetRootWindow());
  EXPECT_EQ(root_windows[1], window3->GetRootWindow());
  EXPECT_EQ(root_windows[1], window4->GetRootWindow());

  EXPECT_EQ(root_windows[0], panel1->GetRootWindow());
  EXPECT_EQ(root_windows[0], panel2->GetRootWindow());
  EXPECT_EQ(root_windows[1], panel3->GetRootWindow());
  EXPECT_EQ(root_windows[1], panel4->GetRootWindow());

  // In overview mode, each window remains in the same root window.
  ToggleOverview();
  EXPECT_EQ(root_windows[0], window1->GetRootWindow());
  EXPECT_EQ(root_windows[0], window2->GetRootWindow());
  EXPECT_EQ(root_windows[1], window3->GetRootWindow());
  EXPECT_EQ(root_windows[1], window4->GetRootWindow());
  EXPECT_EQ(root_windows[0], panel1->GetRootWindow());
  EXPECT_EQ(root_windows[0], panel2->GetRootWindow());
  EXPECT_EQ(root_windows[1], panel3->GetRootWindow());
  EXPECT_EQ(root_windows[1], panel4->GetRootWindow());

  EXPECT_TRUE(root_windows[0]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window1.get()))));
  EXPECT_TRUE(root_windows[0]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window2.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window3.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window4.get()))));

  EXPECT_TRUE(root_windows[0]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(panel1.get()))));
  EXPECT_TRUE(root_windows[0]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(panel2.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(panel3.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(panel4.get()))));
  EXPECT_TRUE(WindowsOverlapping(panel1.get(), panel2.get()));
  EXPECT_TRUE(WindowsOverlapping(panel3.get(), panel4.get()));
  EXPECT_FALSE(WindowsOverlapping(panel1.get(), panel3.get()));
}

// Verifies that the single display overview used during alt tab cycling uses
// the display of the selected window by default.
TEST_F(WindowSelectorTest, CycleOverviewUsesCurrentDisplay) {
  if (!SupportsMultipleDisplays())
    return;

  UpdateDisplay("400x400,400x400");
  aura::Window::Windows root_windows = Shell::GetAllRootWindows();

  scoped_ptr<aura::Window> window1(CreateWindow(gfx::Rect(0, 0, 100, 100)));
  scoped_ptr<aura::Window> window2(CreateWindow(gfx::Rect(450, 0, 100, 100)));
  EXPECT_EQ(root_windows[0], window1->GetRootWindow());
  EXPECT_EQ(root_windows[1], window2->GetRootWindow());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());
  EXPECT_EQ(root_windows[0], Shell::GetTargetRootWindow());

  Cycle(WindowSelector::FORWARD);
  FireOverviewStartTimer();

  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window1.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window2.get()))));
  StopCycling();
}

// Verifies that the windows being shown on another display are copied.
TEST_F(WindowSelectorTest, CycleMultipleDisplaysCopiesWindows) {
  if (!SupportsMultipleDisplays())
    return;

  UpdateDisplay("400x400,400x400");
  aura::Window::Windows root_windows = Shell::GetAllRootWindows();

  gfx::Rect root1_rect(0, 0, 100, 100);
  gfx::Rect root2_rect(450, 0, 100, 100);
  scoped_ptr<aura::Window> unmoved1(CreateWindow(root2_rect));
  scoped_ptr<aura::Window> unmoved2(CreateWindow(root2_rect));
  scoped_ptr<aura::Window> moved1_trans_parent(CreateWindow(root1_rect));
  scoped_ptr<aura::Window> moved1(CreateWindow(root1_rect));
  unmoved1->SetName("unmoved1");
  unmoved2->SetName("unmoved2");
  moved1->SetName("moved1");
  moved1->SetProperty(aura::client::kModalKey, ui::MODAL_TYPE_WINDOW);
  moved1_trans_parent->AddTransientChild(moved1.get());
  moved1_trans_parent->SetName("moved1_trans_parent");

  EXPECT_EQ(root_windows[0], moved1->GetRootWindow());
  EXPECT_EQ(root_windows[0], moved1_trans_parent->GetRootWindow());
  EXPECT_EQ(root_windows[1], unmoved1->GetRootWindow());
  EXPECT_EQ(root_windows[1], unmoved2->GetRootWindow());
  wm::ActivateWindow(unmoved2.get());
  wm::ActivateWindow(unmoved1.get());

  Cycle(WindowSelector::FORWARD);
  FireOverviewStartTimer();

  // All windows are moved to second root window.
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(unmoved1.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(unmoved2.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(moved1.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(moved1_trans_parent.get()))));

  // unmoved1 and unmoved2 were already on the correct display and should not
  // have been copied.
  EXPECT_TRUE(!GetCopyWindow(unmoved1.get()));
  EXPECT_TRUE(!GetCopyWindow(unmoved2.get()));

  // moved1 and its transient parent moved1_trans_parent should have also been
  // copied for displaying on root_windows[1].
  aura::Window* copy1 = GetCopyWindow(moved1.get());
  aura::Window* copy1_trans_parent = GetCopyWindow(moved1_trans_parent.get());
  ASSERT_FALSE(!copy1);
  ASSERT_FALSE(!copy1_trans_parent);

  // Verify that the bounds and transform of the copy match the original window
  // but that it is on the other root window.
  EXPECT_EQ(root_windows[1], copy1->GetRootWindow());
  EXPECT_EQ(moved1->GetBoundsInScreen().ToString(),
            copy1->GetBoundsInScreen().ToString());
  EXPECT_EQ(moved1->layer()->GetTargetTransform().ToString(),
            copy1->layer()->GetTargetTransform().ToString());
  StopCycling();

  // After cycling the copy windows should have been destroyed.
  RunAllPendingInMessageLoop();
  EXPECT_TRUE(!GetCopyWindow(moved1.get()));
  EXPECT_TRUE(!GetCopyWindow(moved1_trans_parent.get()));
}

// Tests that beginning to cycle from overview mode moves windows to the
// active display.
TEST_F(WindowSelectorTest, MultipleDisplaysOverviewTransitionToCycle) {
  if (!SupportsMultipleDisplays())
    return;

  UpdateDisplay("400x400,400x400");
  aura::Window::Windows root_windows = Shell::GetAllRootWindows();

  scoped_ptr<aura::Window> window1(CreateWindow(gfx::Rect(0, 0, 100, 100)));
  scoped_ptr<aura::Window> window2(CreateWindow(gfx::Rect(450, 0, 100, 100)));
  EXPECT_EQ(root_windows[0], window1->GetRootWindow());
  EXPECT_EQ(root_windows[1], window2->GetRootWindow());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());

  ToggleOverview();
  EXPECT_TRUE(root_windows[0]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window1.get()))));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window2.get()))));

  Cycle(WindowSelector::FORWARD);
  EXPECT_TRUE(root_windows[0]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window1.get()))));
  EXPECT_TRUE(root_windows[0]->GetBoundsInScreen().Contains(
      ToEnclosingRect(GetTransformedTargetBounds(window2.get()))));
  StopCycling();
}

// Tests that a bounds change during overview is corrected for.
TEST_F(WindowSelectorTest, BoundsChangeDuringCycleOnOtherDisplay) {
  if (!SupportsMultipleDisplays())
    return;

  UpdateDisplay("400x400,400x400");
  aura::Window::Windows root_windows = Shell::GetAllRootWindows();

  scoped_ptr<aura::Window> window1(CreateWindow(gfx::Rect(0, 0, 100, 100)));
  scoped_ptr<aura::Window> window2(CreateWindow(gfx::Rect(450, 0, 100, 100)));
  scoped_ptr<aura::Window> window3(CreateWindow(gfx::Rect(450, 0, 100, 100)));
  EXPECT_EQ(root_windows[0], window1->GetRootWindow());
  EXPECT_EQ(root_windows[1], window2->GetRootWindow());
  EXPECT_EQ(root_windows[1], window3->GetRootWindow());
  wm::ActivateWindow(window1.get());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window3.get());

  Cycle(WindowSelector::FORWARD);
  FireOverviewStartTimer();

  gfx::Rect overview_bounds(
      ToEnclosingRect(GetTransformedTargetBounds(window1.get())));
  EXPECT_TRUE(root_windows[1]->GetBoundsInScreen().Contains(overview_bounds));

  // Change the position and size of window1 (being displayed on the second
  // root window) and it should remain within the same bounds.
  window1->SetBounds(gfx::Rect(100, 0, 200, 200));
  gfx::Rect new_overview_bounds =
      ToEnclosingRect(GetTransformedTargetBounds(window1.get()));
  EXPECT_EQ(overview_bounds.x(), new_overview_bounds.x());
  EXPECT_EQ(overview_bounds.y(), new_overview_bounds.y());
  EXPECT_EQ(overview_bounds.width(), new_overview_bounds.width());
  EXPECT_EQ(overview_bounds.height(), new_overview_bounds.height());
  StopCycling();
}

// Tests shutting down during overview.
TEST_F(WindowSelectorTest, Shutdown) {
  gfx::Rect bounds(0, 0, 400, 400);
  // These windows will be deleted when the test exits and the Shell instance
  // is shut down.
  aura::Window* window1(CreateWindow(bounds));
  aura::Window* window2(CreateWindow(bounds));
  aura::Window* window3(CreatePanelWindow(bounds));
  aura::Window* window4(CreatePanelWindow(bounds));

  wm::ActivateWindow(window4);
  wm::ActivateWindow(window3);
  wm::ActivateWindow(window2);
  wm::ActivateWindow(window1);

  ToggleOverview();
}

// Tests removing a display during overview.
TEST_F(WindowSelectorTest, RemoveDisplay) {
  if (!SupportsMultipleDisplays())
    return;

  UpdateDisplay("400x400,400x400");
  gfx::Rect bounds1(0, 0, 100, 100);
  gfx::Rect bounds2(450, 0, 100, 100);
  scoped_ptr<aura::Window> window1(CreateWindow(bounds1));
  scoped_ptr<aura::Window> window2(CreateWindow(bounds2));
  scoped_ptr<aura::Window> window3(CreatePanelWindow(bounds1));
  scoped_ptr<aura::Window> window4(CreatePanelWindow(bounds2));

  aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  EXPECT_EQ(root_windows[0], window1->GetRootWindow());
  EXPECT_EQ(root_windows[1], window2->GetRootWindow());
  EXPECT_EQ(root_windows[0], window3->GetRootWindow());
  EXPECT_EQ(root_windows[1], window4->GetRootWindow());

  wm::ActivateWindow(window4.get());
  wm::ActivateWindow(window3.get());
  wm::ActivateWindow(window2.get());
  wm::ActivateWindow(window1.get());

  ToggleOverview();
  EXPECT_TRUE(IsSelecting());
  UpdateDisplay("400x400");
  EXPECT_FALSE(IsSelecting());
}

}  // namespace internal
}  // namespace ash