Implement NativeViewHostAura::InstallClip.

ui/views/controls/native/native_view_host_aura_unittest.cc

Index: ui/views/controls/native/native_view_host_aura_unittest.cc
diff --git a/ui/views/controls/native/native_view_host_aura_unittest.cc b/ui/views/controls/native/native_view_host_aura_unittest.cc
index f6dc561f2f04fdaffb166e61141631d07b5dafce..5f5b42245bdc7e55210c400595d0cb67e11a39eb 100644
--- a/ui/views/controls/native/native_view_host_aura_unittest.cc
+++ b/ui/views/controls/native/native_view_host_aura_unittest.cc
@@ -16,6 +16,23 @@
 
 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;
+
 class NativeViewHostAuraTest : public ViewsTestBase {
  public:
   NativeViewHostAuraTest() {
@@ -37,6 +54,8 @@ class NativeViewHostAuraTest : public ViewsTestBase {
     return child_.get();
   }
 
+  aura::Window* clipping_window() { return &(native_host()->clipping_window_); }
+
   void CreateHost() {
     // Create the top level widget.
     toplevel_.reset(new Widget);
@@ -55,7 +74,7 @@ class NativeViewHostAuraTest : public ViewsTestBase {
     child_->SetContentsView(test_view);
 
     // Owned by |toplevel|.
-    host_.reset(new NativeViewHost);
+    host_.reset(new NativeViewHostTesting);
     toplevel_->GetRootView()->AddChildView(host_.get());
     host_->Attach(child_->GetNativeView());
   }
@@ -64,9 +83,13 @@ class NativeViewHostAuraTest : public ViewsTestBase {
     host_.reset();
   }
 
+  NativeViewHostTesting* ReleaseHost() { return host_.release(); }
+
+  void DestroyTopLevel() { toplevel_.reset(); }
+
  private:
   scoped_ptr<Widget> toplevel_;
-  scoped_ptr<NativeViewHost> host_;
+  scoped_ptr<NativeViewHostTesting> host_;
   scoped_ptr<Widget> child_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostAuraTest);
@@ -89,12 +112,15 @@ TEST_F(NativeViewHostAuraTest, HostViewPropertyKey) {
   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));
+  EXPECT_FALSE(clipping_window()->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));
@@ -114,4 +140,94 @@ TEST_F(NativeViewHostAuraTest, CursorForNativeView) {
   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 fast resize path places the clipping and content windows were
+// they are supposed to be.
+TEST_F(NativeViewHostAuraTest, FastResizePath) {
+  CreateHost();
+  toplevel()->SetBounds(gfx::Rect(20, 20, 100, 100));
+
+  // Without fast resize, the clipping window should size to the native view
+  // with the native view positioned at the origin of the clipping window and
+  // the clipping window positioned where the native view was requested.
+  host()->set_fast_resize(false);
+  native_host()->ShowWidget(5, 10, 100, 100);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(5, 10, 100, 100).ToString(),
+            clipping_window()->bounds().ToString());
+
+  // With fast resize, the native view should remain the same size but be
+  // clipped the requested size.
+  host()->set_fast_resize(true);
+  native_host()->ShowWidget(10, 25, 50, 50);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(10, 25, 50, 50).ToString(),
+            clipping_window()->bounds().ToString());
+
+  // Turning off fast resize should make the native view start resizing again.
+  host()->set_fast_resize(false);
+  native_host()->ShowWidget(10, 25, 50, 50);
+  EXPECT_EQ(gfx::Rect(0, 0, 50, 50).ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(10, 25, 50, 50).ToString(),
+            clipping_window()->bounds().ToString());
+
+  DestroyHost();
+}
+
+// Test installing and uninstalling a clip.
+TEST_F(NativeViewHostAuraTest, InstallClip) {
+  CreateHost();
+  toplevel()->SetBounds(gfx::Rect(20, 20, 100, 100));
+
+  // Without a clip, the clipping window should always be positioned at the
+  // requested coordinates with the native view positioned at the origin of the
+  // clipping window.
+  native_host()->ShowWidget(10, 20, 100, 100);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(10, 20, 100, 100).ToString(),
+            clipping_window()->bounds().ToString());
+
+  // Clip to the bottom right quarter of the native view.
+  native_host()->InstallClip(60, 70, 50, 50);
+  native_host()->ShowWidget(10, 20, 100, 100);
+  EXPECT_EQ(gfx::Rect(-50, -50, 100, 100).ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(60, 70, 50, 50).ToString(),
+            clipping_window()->bounds().ToString());
+
+  // Clip to the center of the native view.
+  native_host()->InstallClip(35, 45, 50, 50);
+  native_host()->ShowWidget(10, 20, 100, 100);
+  EXPECT_EQ(gfx::Rect(-25, -25, 100, 100).ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(35, 45, 50, 50).ToString(),
+            clipping_window()->bounds().ToString());
+
+  // Uninstalling the clip should make the clipping window match the native view
+  // again.
+  native_host()->UninstallClip();
+  native_host()->ShowWidget(10, 20, 100, 100);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
+            host()->native_view()->bounds().ToString());
+  EXPECT_EQ(gfx::Rect(10, 20, 100, 100).ToString(),
+            clipping_window()->bounds().ToString());
+
+  DestroyHost();
+}
+
 }  // namespace views