Refactor PhantomWindowController so that the PhantomWindowController owns the phantom window

ash/wm/workspace/phantom_window_controller_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/wm/workspace/phantom_window_controller.h"
+
+#include "ash/ash_switches.h"
+#include "ash/shell.h"
+#include "ash/test/ash_test_base.h"
+#include "ui/aura/root_window.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_observer.h"
+#include "ui/views/widget/widget.h"
+
+namespace ash {
+namespace internal {
+
+namespace {
+
+// Returns true if |window| is non-NULL and is visible.
+bool IsVisible(aura::Window* window) {
+  return window && window->IsVisible();
+}
+
+// Observes |window|'s deletion.
+class WindowDeletionObserver : public aura::WindowObserver {
+ public:
+  WindowDeletionObserver(aura::Window* window) : window_(window) {
+    window_->AddObserver(this);
+  }
+
+  virtual ~WindowDeletionObserver() {
+    if (window_)
+      window_->RemoveObserver(this);
+  }
+
+  // Returns true if the window has not been deleted yet.
+  bool IsWindowAlive() {
+    return !!window_;
+  }
+
+  // aura::WindowObserver:
+  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {
+    window_->RemoveObserver(this);
+    window_ = NULL;
+   }
+
+ private:
+  aura::Window* window_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowDeletionObserver);
+};
+
+}  // namespace
+
+class PhantomWindowControllerTest : public ash::test::AshTestBase {
+ public:
+  PhantomWindowControllerTest() {
+  }
+  virtual ~PhantomWindowControllerTest() {
+  }
+
+  // ash::test::AshTestBase:
+  virtual void SetUp() OVERRIDE {
+    ash::test::AshTestBase::SetUp();
+
+    UpdateDisplay("500x400,500x400");
+    window_ = CreateTestWindowInShellWithBounds(gfx::Rect(0, 0, 50, 60));
+    controller_.reset(new PhantomWindowController(window_));
+  }
+
+  void DeleteController() {
+    controller_.reset();
+  }
+
+  PhantomWindowController* controller() {
+    return controller_.get();
+  }
+
+  aura::Window* window() { return window_; }
+
+  aura::Window* phantom_window_in_target_root() {
+    return controller_->phantom_widget_in_target_root_ ?
+        controller_->phantom_widget_in_target_root_->GetNativeView() :
+        NULL;
+  }
+
+  aura::Window* phantom_window_in_start_root() {
+    return controller_->phantom_widget_in_start_root_ ?
+        controller_->phantom_widget_in_start_root_->GetNativeView() :
+        NULL;
+  }
+
+ private:
+  aura::Window* window_;
+  scoped_ptr<PhantomWindowController> controller_;
+
+  DISALLOW_COPY_AND_ASSIGN(PhantomWindowControllerTest);
+};
+
+// Test that two phantom windows are used when animating to bounds at least
+// partially in another display.
+TEST_F(PhantomWindowControllerTest, PhantomWindowShow) {
+  if (!SupportsMultipleDisplays())
+    return;
+
+  aura::Window::Windows root_windows = Shell::GetAllRootWindows();
+  EXPECT_EQ(root_windows[0], window()->GetRootWindow());
+
+  // Phantom preview only in the left screen.
+  controller()->Show(gfx::Rect(100, 100, 50, 60));
+  EXPECT_TRUE(IsVisible(phantom_window_in_target_root()));
+  EXPECT_FALSE(IsVisible(phantom_window_in_start_root()));
+  EXPECT_EQ(root_windows[0], phantom_window_in_target_root()->GetRootWindow());
+
+  // Move phantom preview into the right screen. Test that 2 windows got
+  // created.
+  controller()->Show(gfx::Rect(600, 100, 50, 60));
+  EXPECT_TRUE(IsVisible(phantom_window_in_target_root()));
+  EXPECT_TRUE(IsVisible(phantom_window_in_start_root()));
+  EXPECT_EQ(root_windows[1], phantom_window_in_target_root()->GetRootWindow());
+  EXPECT_EQ(root_windows[0], phantom_window_in_start_root()->GetRootWindow());
+
+  // Move phantom preview only in the right screen. Start window should close.
+  controller()->Show(gfx::Rect(700, 100, 50, 60));
+  EXPECT_TRUE(IsVisible(phantom_window_in_target_root()));
+  EXPECT_FALSE(IsVisible(phantom_window_in_start_root()));
+  EXPECT_EQ(root_windows[1], phantom_window_in_target_root()->GetRootWindow());
+
+  // Move phantom preview into the left screen. Start window should open.
+  controller()->Show(gfx::Rect(100, 100, 50, 60));
+  EXPECT_TRUE(IsVisible(phantom_window_in_target_root()));
+  EXPECT_TRUE(IsVisible(phantom_window_in_start_root()));
+  EXPECT_EQ(root_windows[0], phantom_window_in_target_root()->GetRootWindow());
+  EXPECT_EQ(root_windows[1], phantom_window_in_start_root()->GetRootWindow());
+
+  // Move phantom preview while in the left screen. Start window should close.
+  controller()->Show(gfx::Rect(200, 100, 50, 60));
+  EXPECT_TRUE(IsVisible(phantom_window_in_target_root()));
+  EXPECT_FALSE(IsVisible(phantom_window_in_start_root()));
+  EXPECT_EQ(root_windows[0], phantom_window_in_target_root()->GetRootWindow());
+
+  // Move phantom preview spanning both screens with most of the preview in the
+  // right screen. Two windows are created.
+  controller()->Show(gfx::Rect(495, 100, 50, 60));
+  EXPECT_TRUE(IsVisible(phantom_window_in_target_root()));
+  EXPECT_TRUE(IsVisible(phantom_window_in_start_root()));
+  EXPECT_EQ(root_windows[1], phantom_window_in_target_root()->GetRootWindow());
+  EXPECT_EQ(root_windows[0], phantom_window_in_start_root()->GetRootWindow());
+
+  // Move phantom preview back into the left screen. Phantom windows should
+  // swap.
+  controller()->Show(gfx::Rect(200, 100, 50, 60));
+  EXPECT_TRUE(IsVisible(phantom_window_in_target_root()));
+  EXPECT_TRUE(IsVisible(phantom_window_in_start_root()));
+  EXPECT_EQ(root_windows[0], phantom_window_in_target_root()->GetRootWindow());
+  EXPECT_EQ(root_windows[1], phantom_window_in_start_root()->GetRootWindow());
+
+  // Destroy phantom controller. Both windows should close.
+  WindowDeletionObserver target_deletion_observer(
+      phantom_window_in_target_root());
+  WindowDeletionObserver start_deletion_observer(
+      phantom_window_in_start_root());
+  DeleteController();
+  EXPECT_FALSE(target_deletion_observer.IsWindowAlive());
+  EXPECT_FALSE(start_deletion_observer.IsWindowAlive());
+}
+
+}  // namespace internal
+}  // namespace ash