CrOS Tablet Window management - Split Screen part I

ash/wm/splitview/split_view_controller_unittest.cc

+// Copyright 2017 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/splitview/split_view_controller.h"
+#include "ash/shell.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/wm/overview/window_selector_controller.h"
+#include "ash/wm/window_state.h"
+#include "ash/wm/window_util.h"
+#include "ash/wm/wm_event.h"
+#include "ui/aura/test/test_window_delegate.h"
+
+namespace ash {
+
+class SplitViewControllerTest : public test::AshTestBase {
+ public:
+  SplitViewControllerTest() {}
+  ~SplitViewControllerTest() override {}
+
+  void SetUp() override { test::AshTestBase::SetUp(); }
+
+  aura::Window* CreateWindow(const gfx::Rect& bounds) {
+    aura::Window* window =
+        CreateTestWindowInShellWithDelegate(&delegate_, -1, bounds);
+    return window;
+  }
+
+  void EndSplitView() { split_view_controller()->EndSplitView(); }
+
+  void ToggleOverview() {
+    Shell::Get()->window_selector_controller()->ToggleOverview();
+  }
+
+  std::vector<aura::Window*> GetWindowsInOverviewGrids() {
+    return Shell::Get()
+        ->window_selector_controller()
+        ->GetWindowsListInOverviewGridsForTesting();
+  }
+
+  SplitViewController* split_view_controller() {
+    return Shell::Get()->split_view_controller();
+  }
+
+ private:
+  aura::test::TestWindowDelegate delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(SplitViewControllerTest);
+};
+
+// Tests the basic functionalities.
+TEST_F(SplitViewControllerTest, Basic) {
+  gfx::Rect bounds(0, 0, 400, 400);
+  std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window2(CreateWindow(bounds));
+
+  EXPECT_EQ(split_view_controller()->state(), SplitViewController::NOSNAP);
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+
+  split_view_controller()->SetLeftWindow(window1.get());
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::LEFT_SNAPPED);
+  EXPECT_EQ(split_view_controller()->left_window(), window1.get());
+  EXPECT_NE(split_view_controller()->left_window(), window2.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+  EXPECT_EQ(window1->GetBoundsInScreen(),
+            split_view_controller()->GetSnappedWindowBoundsInScreen(
+                window1.get(), SplitViewController::LEFT_SNAPPED));
+
+  split_view_controller()->SetRightWindow(window2.get());
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::BOTH_SNAPPED);
+  EXPECT_EQ(split_view_controller()->right_window(), window2.get());
+  EXPECT_NE(split_view_controller()->right_window(), window1.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+  EXPECT_EQ(window2->GetBoundsInScreen(),
+            split_view_controller()->GetSnappedWindowBoundsInScreen(
+                window2.get(), SplitViewController::RIGHT_SNAPPED));
+
+  EndSplitView();
+  EXPECT_EQ(split_view_controller()->state(), SplitViewController::NOSNAP);
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+}
+
+// Tests that the default snapped window is the first window that gets snapped.
+TEST_F(SplitViewControllerTest, DefaultSnappedWindow) {
+  gfx::Rect bounds(0, 0, 400, 400);
+  std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window2(CreateWindow(bounds));
+
+  split_view_controller()->SetLeftWindow(window1.get());
+  split_view_controller()->SetRightWindow(window2.get());
+  EXPECT_EQ(window1.get(), split_view_controller()->GetDefaultSnappedWindow());
+
+  EndSplitView();
+  split_view_controller()->SetLeftWindow(window2.get());
+  split_view_controller()->SetRightWindow(window1.get());
+  EXPECT_EQ(window2.get(), split_view_controller()->GetDefaultSnappedWindow());
+}
+
+// Tests that closing one of the snapped windows exits the split view mode.
+TEST_F(SplitViewControllerTest, EndSplitViewUponWindowClose) {
+  gfx::Rect bounds(0, 0, 400, 400);
+  std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window2(CreateWindow(bounds));
+
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+  split_view_controller()->SetLeftWindow(window1.get());
+  split_view_controller()->SetRightWindow(window2.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+
+  window1.reset();
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+}
+
+// Tests that if one of the snapped window gets minimized / maximized / full-
+// screened, end the split view mode.
+TEST_F(SplitViewControllerTest, WindowStateChangeTest) {
+  gfx::Rect bounds(0, 0, 400, 400);
+  std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+
+  split_view_controller()->SetLeftWindow(window1.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+
+  wm::WMEvent minimize_event(wm::WM_EVENT_MINIMIZE);
+  wm::GetWindowState(window1.get())->OnWMEvent(&minimize_event);
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+
+  split_view_controller()->SetLeftWindow(window1.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+
+  wm::WMEvent maximize_event(wm::WM_EVENT_MAXIMIZE);
+  wm::GetWindowState(window1.get())->OnWMEvent(&maximize_event);
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+
+  split_view_controller()->SetLeftWindow(window1.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+
+  wm::WMEvent fullscreen_event(wm::WM_EVENT_FULLSCREEN);
+  wm::GetWindowState(window1.get())->OnWMEvent(&fullscreen_event);
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+}
+
+// Tests that if split view mode is active, activate another window will snap
+// the window to the non-default side of the screen.
+TEST_F(SplitViewControllerTest, WindowActivationTest) {
+  gfx::Rect bounds(0, 0, 400, 400);
+  std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window2(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window3(CreateWindow(bounds));
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+
+  split_view_controller()->SetLeftWindow(window1.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+  EXPECT_EQ(split_view_controller()->left_window(), window1.get());
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::LEFT_SNAPPED);
+
+  wm::ActivateWindow(window2.get());
+  EXPECT_EQ(split_view_controller()->right_window(), window2.get());
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::BOTH_SNAPPED);
+
+  wm::ActivateWindow(window3.get());
+  EXPECT_EQ(split_view_controller()->right_window(), window3.get());
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::BOTH_SNAPPED);
+}
+
+// Tests that if split view mode and overview mode are active at the same time,
+// i.e., half of the screen is occupied by a snapped window and half of the
+// screen is occupied by the overview windows grid, the next activatable window
+// will be picked to snap when exiting the overview mode.
+TEST_F(SplitViewControllerTest, ExitOverviewTest) {
+  gfx::Rect bounds(0, 0, 400, 400);
+  std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window2(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window3(CreateWindow(bounds));
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), false);
+
+  ToggleOverview();
+  split_view_controller()->SetLeftWindow(window1.get());
+  EXPECT_EQ(split_view_controller()->IsSplitViewModeActive(), true);
+  EXPECT_EQ(split_view_controller()->left_window(), window1.get());
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::LEFT_SNAPPED);
+
+  ToggleOverview();
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::BOTH_SNAPPED);
+  EXPECT_EQ(split_view_controller()->right_window(), window3.get());
+}
+
+// Tests that if split view mode is active when entering overview, the overview
+// windows grid should show in the non-default side of the screen, and the
+// default snapped window should not be shown in the overview window grid.
+TEST_F(SplitViewControllerTest, EnterOverviewTest) {
+  gfx::Rect bounds(0, 0, 400, 400);
+  std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window2(CreateWindow(bounds));
+  std::unique_ptr<aura::Window> window3(CreateWindow(bounds));
+
+  split_view_controller()->SetLeftWindow(window1.get());
+  split_view_controller()->SetRightWindow(window2.get());
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::BOTH_SNAPPED);
+  EXPECT_EQ(split_view_controller()->GetDefaultSnappedWindow(), window1.get());
+
+  ToggleOverview();
+  EXPECT_EQ(split_view_controller()->state(),
+            SplitViewController::LEFT_SNAPPED);
+  std::vector<aura::Window*> windows = GetWindowsInOverviewGrids();
+  auto iter = std::find(windows.begin(), windows.end(),
+                        split_view_controller()->GetDefaultSnappedWindow());
+  EXPECT_TRUE(iter == windows.end());
+}
+
+}  // namespace ash