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"
@@ skipping 14 matching lines @@
   }
 
   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);
     toplevel_->GetRootView()->AddChildView(host_.get());
     host_->Attach(child_->GetNativeView());
   }
 
   void DestroyHost() {
     host_.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<Widget> child_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostAuraTest);
 };
 
 // Verifies NativeViewHostAura stops observing native view on destruction.
 TEST_F(NativeViewHostAuraTest, StopObservingNativeViewOnDestruct) {
@@ skipping 16 matching lines @@
   host()->Detach();
   EXPECT_FALSE(child_win->GetProperty(views::kHostViewKey));
 
   host()->Attach(child_win);
   EXPECT_EQ(host(), child_win->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),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTH);
+  EXPECT_EQ(gfx::Point(-25, 0),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHEAST);
+  EXPECT_EQ(gfx::Point(-50, 0),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_EAST);
+  EXPECT_EQ(gfx::Point(-50, -25),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHEAST);
+  EXPECT_EQ(gfx::Point(-50, -50),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTH);
+  EXPECT_EQ(gfx::Point(-25, -50),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHWEST);
+  EXPECT_EQ(gfx::Point(0, -50),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_WEST);
+  EXPECT_EQ(gfx::Point(0, -25),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_CENTER);
+  EXPECT_EQ(gfx::Point(-25, -25),
+            CalculateNativeViewOrigin(clip_rect, contents_rect));
+
+  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_NORTHWEST);
+  native_host()->ShowWidget(0, 0, 50, 50);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100),
+            host()->native_view()->layer()->bounds());
+  EXPECT_EQ(gfx::Rect(0, 0, 50, 50), clipping_window()->layer()->bounds());
+
+  host()->set_fast_resize(false);
+  native_host()->ShowWidget(0, 0, 100, 100);
+  host()->set_fast_resize(true);
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHEAST);
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100),
+            host()->native_view()->layer()->bounds());
+  EXPECT_EQ(gfx::Rect(0, 0, 100, 100), clipping_window()->layer()->bounds());
+
+  native_host()->ShowWidget(0, 0, 50, 50);
+  EXPECT_EQ(gfx::Rect(-50, -50, 100, 100),
+            host()->native_view()->layer()->bounds());
+  EXPECT_EQ(gfx::Rect(0, 0, 50, 50), clipping_window()->layer()->bounds());
+
+  DestroyHost();
+}
+
 }  // namespace views