Add window overview mode behind --ash-enable-overview-mode flag to F5 key.

ash/wm/window_selector_unittest.cc

Index: ash/wm/window_selector_unittest.cc
diff --git a/ash/wm/window_selector_unittest.cc b/ash/wm/window_selector_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..972f8dbe2f7742f772f0892a2a83ab662b7b3450
--- /dev/null
+++ b/ash/wm/window_selector_unittest.cc
@@ -0,0 +1,202 @@
+// Copyright (c) 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/root_window_controller.h"
+#include "ash/screen_ash.h"
+#include "ash/shell.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/test/shell_test_api.h"
+#include "ash/wm/mru_window_tracker.h"
+#include "ash/wm/window_selector_controller.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/aura_constants.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/layer_animator.h"
+#include "ui/gfx/rect_conversions.h"
+#include "ui/gfx/transform.h"
+
+namespace ash {
+namespace internal {
+
+namespace {
+
+class LayerAnimationObserver : public ui::LayerAnimationObserver {
+ public:
+  LayerAnimationObserver(ui::Layer* layer)
+      : layer_(layer), animating_(false), message_loop_running_(false) {
+    layer_->GetAnimator()->AddObserver(this);
+  }
+
+  virtual ~LayerAnimationObserver() {
+    layer_->GetAnimator()->RemoveObserver(this);
+  }
+
+  virtual void OnLayerAnimationEnded(
+      ui::LayerAnimationSequence* sequence) OVERRIDE {
+    AnimationDone();
+  }
+
+  virtual void OnLayerAnimationScheduled(
+      ui::LayerAnimationSequence* sequence) OVERRIDE {
+    animating_ = true;
+  }
+
+  virtual void OnLayerAnimationAborted(
+      ui::LayerAnimationSequence* sequence) OVERRIDE {
+    AnimationDone();
+  }
+
+  void WaitUntilDone() {
+    while (animating_) {
+      message_loop_running_ = true;
+      base::MessageLoop::current()->Run();
+      message_loop_running_ = false;
+    }
+  }
+
+ private:
+  void AnimationDone() {
+    animating_ = false;
+    if (message_loop_running_)
+      base::MessageLoop::current()->Quit();
+  }
+
+  ui::Layer* layer_;
+  bool animating_;
+  bool message_loop_running_;
+
+  DISALLOW_COPY_AND_ASSIGN(LayerAnimationObserver);
+};
+
+}  // namespace
+
+class WindowSelectorTest : public test::AshTestBase {
+ public:
+  WindowSelectorTest() {}
+  virtual ~WindowSelectorTest() {}
+
+  aura::Window* CreateWindow(const gfx::Rect& bounds) {
+    return CreateTestWindowInShellWithDelegate(&wd, -1, bounds);
+  }
+
+  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() {
+    std::vector<aura::Window*> windows = ash::Shell::GetInstance()->
+        mru_window_tracker()->BuildMruWindowList();
+    ScopedVector<LayerAnimationObserver> animations;
+    for (size_t i = 0; i < windows.size(); ++i) {
+      animations.push_back(new LayerAnimationObserver(windows[i]->layer()));
+    }
+    ash::Shell::GetInstance()->window_selector_controller()->ToggleOverview();
+    for (size_t i = 0; i < animations.size(); ++i) {
+      animations[i]->WaitUntilDone();
+    }
+  }
+
+  gfx::RectF GetTransformedBounds(aura::Window* window) {
+    gfx::RectF bounds(window->layer()->bounds());
+    window->layer()->transform().TransformRect(&bounds);
+    return bounds;
+  }
+
+  gfx::RectF GetTransformedTargetBounds(aura::Window* window) {
+    gfx::RectF bounds(window->layer()->GetTargetBounds());
+    window->layer()->GetTargetTransform().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();
+  }
+
+ private:
+  aura::test::TestWindowDelegate wd;
+
+  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);
+  scoped_ptr<aura::Window> window1(CreateWindow(bounds));
+  scoped_ptr<aura::Window> window2(CreateWindow(bounds));
+  EXPECT_TRUE(WindowsOverlapping(window1.get(), window2.get()));
+  wm::ActivateWindow(window2.get());
+  EXPECT_FALSE(wm::IsActiveWindow(window1.get()));
+  EXPECT_TRUE(wm::IsActiveWindow(window2.get()));
+
+  // In overview mode the windows should no longer overlap.
+  ToggleOverview();
+  EXPECT_FALSE(WindowsOverlapping(window1.get(), window2.get()));
+
+  // Clicking window 1 should activate it.
+  ClickWindow(window1.get());
+  EXPECT_TRUE(wm::IsActiveWindow(window1.get()));
+  EXPECT_FALSE(wm::IsActiveWindow(window2.get()));
+}
+
+// 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(ash::Shell::GetInstance()->window_selector_controller()->
+               IsSelecting());
+}
+
+// Tests that windows remain on the display they are currently on in overview
+// mode.
+TEST_F(WindowSelectorTest, MultipleDisplays) {
+  if (!SupportsMultipleDisplays())
+    return;
+
+  UpdateDisplay("400x400,400x400");
+  Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
+
+  scoped_ptr<aura::Window> window1(CreateWindow(gfx::Rect(0, 0, 100, 100)));
+  scoped_ptr<aura::Window> window2(CreateWindow(gfx::Rect(0, 0, 100, 100)));
+  scoped_ptr<aura::Window> window3(CreateWindow(gfx::Rect(450, 0, 100, 100)));
+  scoped_ptr<aura::Window> window4(CreateWindow(gfx::Rect(450, 0, 100, 100)));
+  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());
+
+  // 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());
+  root_windows[0]->bounds().Contains(
+      ToEnclosingRect(GetTransformedBounds(window1.get())));
+  root_windows[0]->bounds().Contains(
+      ToEnclosingRect(GetTransformedBounds(window2.get())));
+  root_windows[1]->bounds().Contains(
+      ToEnclosingRect(GetTransformedBounds(window3.get())));
+  root_windows[1]->bounds().Contains(
+      ToEnclosingRect(GetTransformedBounds(window4.get())));
+}
+
+}  // namespace internal
+}  // namespace ash