Reland: Implement features in NativeViewHostAura for scroll end effect

ui/views/controls/native/native_view_host_aura_unittest.cc

 // 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 "ui/views/controls/native/native_view_host_aura.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window.h"
 #include "ui/views/controls/native/native_view_host.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/view.h"
 #include "ui/views/view_constants_aura.h"
 #include "ui/views/widget/widget.h"
 
 namespace views {
 
+// Testing wrapper of the NativeViewHost
+class NativeViewHostTesting : public NativeViewHost {
+ public:
+  NativeViewHostTesting() {}
+  virtual ~NativeViewHostTesting() {
+    destroyed_count_++;
+  }
+
+  static void ResetDestroyedCount() {
+    destroyed_count_ = 0;
+  }
+
+  static int destroyed_count() {
+    return destroyed_count_;
+  }
+
+ private:
+  static int destroyed_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeViewHostTesting);
+};
+int NativeViewHostTesting::destroyed_count_ = 0;
+
+// Observer watching for how many times an aura::Window has been destroyed. This
+// is used to confirm that an object has been cleaned up when expected.
+class AuraWindowDestroyedObserver : public aura::WindowObserver {
+ public:
+  AuraWindowDestroyedObserver(aura::Window *window) :
+      destroyed_count_(0) {
+    window->AddObserver(this);
+  }
+
+  virtual ~AuraWindowDestroyedObserver() {}
+
+  int destroyed_count() { return destroyed_count_; }
+
+  // aura::WindowObserver overrides
+  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {
+    destroyed_count_++;
+  }
+
+ private:
+  int destroyed_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(AuraWindowDestroyedObserver);
+};
+
 class NativeViewHostAuraTest : public ViewsTestBase {
  public:
   NativeViewHostAuraTest() {
   }
 
   NativeViewHostAura* native_host() {
     return static_cast<NativeViewHostAura*>(host_->native_wrapper_.get());
   }
 
   NativeViewHost* host() {
     return host_.get();
   }
 
   Widget* child() {
     return child_.get();
   }
 
+  aura::Window* clipping_window() {
+    return native_host()->clipping_window_;
+  }
+
+  Widget* toplevel() {
+    return toplevel_.get();
+  }
+
   void CreateHost() {
     // Create the top level widget.
     toplevel_.reset(new Widget);
     Widget::InitParams toplevel_params =
         CreateParams(Widget::InitParams::TYPE_WINDOW);
     toplevel_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
     toplevel_->Init(toplevel_params);
 
     // And the child widget.
     View* test_view = new View;
     child_.reset(new Widget);
     Widget::InitParams child_params(Widget::InitParams::TYPE_CONTROL);
     child_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
     child_params.parent = toplevel_->GetNativeView();
     child_->Init(child_params);
     child_->SetContentsView(test_view);
 
     // Owned by |toplevel|.
-    host_.reset(new NativeViewHost);
+    host_.reset(new NativeViewHostTesting);
     toplevel_->GetRootView()->AddChildView(host_.get());
     host_->Attach(child_->GetNativeView());
   }
 
   void DestroyHost() {
     host_.reset();
   }
 
+  NativeViewHostTesting* ReleaseHost() {
+    return host_.release();
+  }
+
+  void DestroyTopLevel() {
+    toplevel_.reset();
+  }
+
+  gfx::Point CalculateNativeViewOrigin(gfx::Rect input_rect,
+                                       gfx::Rect native_rect) {
+    return native_host()->CalculateNativeViewOrigin(input_rect, native_rect);
+  }
+
  private:
   scoped_ptr<Widget> toplevel_;
-  scoped_ptr<NativeViewHost> host_;
+  scoped_ptr<NativeViewHostTesting> host_;
   scoped_ptr<Widget> child_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostAuraTest);
 };
 
 // Verifies NativeViewHostAura stops observing native view on destruction.
 TEST_F(NativeViewHostAuraTest, StopObservingNativeViewOnDestruct) {
   CreateHost();
   aura::Window* child_win = child()->GetNativeView();
   NativeViewHostAura* aura_host = native_host();
 
   EXPECT_TRUE(child_win->HasObserver(aura_host));
   DestroyHost();
   EXPECT_FALSE(child_win->HasObserver(aura_host));
 }
 
 // Tests that the kHostViewKey is correctly set and cleared.
 TEST_F(NativeViewHostAuraTest, HostViewPropertyKey) {
   // Create the NativeViewHost and attach a NativeView.
   CreateHost();
   aura::Window* child_win = child()->GetNativeView();
   EXPECT_EQ(host(), child_win->GetProperty(views::kHostViewKey));
+  EXPECT_EQ(host(), clipping_window()->GetProperty(views::kHostViewKey));
 
   host()->Detach();
   EXPECT_FALSE(child_win->GetProperty(views::kHostViewKey));
 
   host()->Attach(child_win);
   EXPECT_EQ(host(), child_win->GetProperty(views::kHostViewKey));
+  EXPECT_EQ(host(), clipping_window()->GetProperty(views::kHostViewKey));
 
   DestroyHost();
   EXPECT_FALSE(child_win->GetProperty(views::kHostViewKey));
 }
 
+// Tests that the values being calculated by CalculateNativeViewOrigin are
+// correct.
+TEST_F(NativeViewHostAuraTest, CalculateNewNativeViewOrigin) {
+  CreateHost();
+
+  gfx::Rect clip_rect(0, 0, 50, 50);
+  gfx::Rect contents_rect(50, 50, 100, 100);
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHWEST);
+  EXPECT_EQ(gfx::Point(0, 0).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTH);
+  EXPECT_EQ(gfx::Point(-25, 0).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHEAST);
+  EXPECT_EQ(gfx::Point(-50, 0).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_EAST);
+  EXPECT_EQ(gfx::Point(-50, -25).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHEAST);
+  EXPECT_EQ(gfx::Point(-50, -50).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTH);
+  EXPECT_EQ(gfx::Point(-25, -50).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHWEST);
+  EXPECT_EQ(gfx::Point(0, -50).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_WEST);
+  EXPECT_EQ(gfx::Point(0, -25).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_CENTER);
+  EXPECT_EQ(gfx::Point(-25, -25).ToString(),
+            CalculateNativeViewOrigin(clip_rect, contents_rect).ToString());
+
+  DestroyHost();
+}
+
+// Test that the fast resize path places the clipping and content windows were
+// they are supposed to be.
+TEST_F(NativeViewHostAuraTest, FastResizePath) {
+  CreateHost();
+  host()->set_fast_resize(false);
+  toplevel()->SetBounds(gfx::Rect(0, 0, 100, 100));
+  native_host()->ShowWidget(0, 0, 100, 100);
+  host()->set_fast_resize(true);
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_CENTER);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
+            host()->native_view()->layer()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
+            clipping_window()->layer()->bounds().ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHWEST);
+  native_host()->ShowWidget(0, 0, 50, 50);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
+            host()->native_view()->layer()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(0, 0, 50, 50).ToString(),
+            clipping_window()->layer()->bounds().ToString());
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHEAST);
+  native_host()->ShowWidget(0, 0, 50, 50);
+  EXPECT_EQ(gfx::Rect(-50, -50, 100, 100).ToString(),
+            host()->native_view()->layer()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(0, 0, 50, 50).ToString(),
+            clipping_window()->layer()->bounds().ToString());
+
+  DestroyHost();
+}
+
+// Test that destroying the top level widget before destroying the attached
+// NativeViewHost works correctly. Specifically the associated NVH should be
+// destroyed and there shouldn't be any errors.
+TEST_F(NativeViewHostAuraTest, DestroyWidget) {
+  NativeViewHostTesting::ResetDestroyedCount();
+  CreateHost();
+  ReleaseHost();
+  EXPECT_EQ(0, NativeViewHostTesting::destroyed_count());
+  DestroyTopLevel();
+  EXPECT_EQ(1, NativeViewHostTesting::destroyed_count());
+}
+
+// Test that the clipping window and the native view are destroyed when the
+// containing widget for the native view is closed.
+TEST_F(NativeViewHostAuraTest, ClosingWidgetDoesntLeak) {
+  CreateHost();
+  AuraWindowDestroyedObserver clipping_observer(clipping_window());
+  AuraWindowDestroyedObserver native_view_observer(child()->GetNativeView());
+  EXPECT_EQ(0, clipping_observer.destroyed_count());
+  EXPECT_EQ(0, native_view_observer.destroyed_count());
+  child()->CloseNow();
+  EXPECT_EQ(1, clipping_observer.destroyed_count());
+  EXPECT_EQ(1, native_view_observer.destroyed_count());
+  DestroyHost();
+}
+
+// Test that the none fast resize path is clipped and positioned correctly.
+TEST_F(NativeViewHostAuraTest, NonFastResizePath) {
+  const gfx::Rect base_rect = gfx::Rect(0, 0, 100, 100);
+  CreateHost();
+  toplevel()->SetBounds(base_rect);
+  native_host()->ShowWidget(base_rect.x(), base_rect.y(),
+                            base_rect.width(), base_rect.height());
+  EXPECT_EQ(base_rect.ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(base_rect.ToString(),
+            clipping_window()->bounds().ToString());
+
+  const gfx::Rect kTestCases[] = {
+    gfx::Rect(-10, -20, 100, 100),
+    gfx::Rect(0, -20, 100, 100),
+    gfx::Rect(10, -20, 100, 100),
+    gfx::Rect(-10, 0, 100, 100),
+    gfx::Rect(0, 0, 100, 100),
+    gfx::Rect(10, 0, 100, 100),
+    gfx::Rect(-10, 20, 100, 100),
+    gfx::Rect(0, 20, 100, 100),
+    gfx::Rect(10, 20, 100, 100),
+    gfx::Rect(0, 0, 200, 300),
+    gfx::Rect(-50, -100, 200, 300),
+  };
+
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTestCases); ++i) {
+    const gfx::Rect& bounds = kTestCases[i];
+
+    host()->SetBoundsRect(bounds);
+
+    gfx::Rect clip_rect = gfx::IntersectRects(bounds, base_rect);
+    EXPECT_EQ(clip_rect.ToString(), clipping_window()->bounds().ToString());
+
+    gfx::Rect native_view_bounds = bounds;
+    native_view_bounds.Offset(-clip_rect.x(), -clip_rect.y());
+    EXPECT_EQ(native_view_bounds.ToString(),
+              host()->native_view()->bounds().ToString());
+  }
+
+  DestroyHost();
+}
+
 }  // namespace views