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 41 matching lines @@
     // Owned by |toplevel|.
     host_.reset(new NativeViewHost);
     toplevel_->GetRootView()->AddChildView(host_.get());
     host_->Attach(child_->GetNativeView());
   }
 
   void DestroyHost() {
     host_.reset();
   }
 
+  gfx::Point CalculateNewNativeViewOrigin(gfx::Rect input_rect,
+                                          gfx::Rect native_rect) {
+    return native_host()->CalculateNewNativeViewOrigin(input_rect, native_rect);
+  }
+
+  gfx::Point CalculateClipOrigin(gfx::Rect input_rect,
+                                 gfx::Rect native_rect) {
+    return native_host()->CalculateClipOrigin(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 CalculateNewNativeViewOrigin are
+// correct.
+TEST_F(NativeViewHostAuraTest, CalculateNewNativeViewOrigin) {
+  CreateHost();
+
+  gfx::Rect clip_rect(50, 50, 50, 50);
+  gfx::Rect contents_rect(0, 0, 100, 100);
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHWEST);
+  EXPECT_EQ(gfx::Point(50, 50),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTH);
+  EXPECT_EQ(gfx::Point(25, 50),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHEAST);
+  EXPECT_EQ(gfx::Point(0, 50),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_EAST);
+  EXPECT_EQ(gfx::Point(0, 25),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHEAST);
+  EXPECT_EQ(gfx::Point(0, 0),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTH);
+  EXPECT_EQ(gfx::Point(25, 0),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHWEST);
+  EXPECT_EQ(gfx::Point(50, 0),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_WEST);
+  EXPECT_EQ(gfx::Point(50, 25),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_CENTER);
+  EXPECT_EQ(gfx::Point(25, 25),
+            CalculateNewNativeViewOrigin(clip_rect, contents_rect));
+}
+
+// Tests that the values being calculated by CalculateClipOrigin are
+// correct.
+TEST_F(NativeViewHostAuraTest, CalculateClipOrigin) {
+  CreateHost();
+
+  gfx::Rect clip_rect(50, 50, 50, 50);
+  gfx::Rect contents_rect(0, 0, 100, 100);
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHWEST);
+  contents_rect.set_origin(gfx::Point(50, 50));
+  EXPECT_EQ(gfx::Point(0,0),
+            CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTH);
+  contents_rect.set_origin(gfx::Point(25, 50));
+   EXPECT_EQ(gfx::Point(-25, 0),
+             CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_NORTHEAST);
+  contents_rect.set_origin(gfx::Point(0, 50));
+  EXPECT_EQ(gfx::Point(-50, 0),
+            CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_EAST);
+  contents_rect.set_origin(gfx::Point(0, 25));
+  EXPECT_EQ(gfx::Point(-50, -25),
+            CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHEAST);
+  contents_rect.set_origin(gfx::Point(0, 0));
+  EXPECT_EQ(gfx::Point(-50, -50),
+            CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTH);
+  contents_rect.set_origin(gfx::Point(25, 0));
+  EXPECT_EQ(gfx::Point(-25, -50),
+            CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_SOUTHWEST);
+  contents_rect.set_origin(gfx::Point(50, 0));
+  EXPECT_EQ(gfx::Point(0, -50),
+            CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_WEST);
+  contents_rect.set_origin(gfx::Point(50, 25));
+  EXPECT_EQ(gfx::Point(0, -25),
+            CalculateClipOrigin(clip_rect, contents_rect));
+
+  host()->set_fast_resize_gravity(NativeViewHost::GRAVITY_CENTER);
+  contents_rect.set_origin(gfx::Point(25, 25));
+  EXPECT_EQ(gfx::Point(-25, -25),
+            CalculateClipOrigin(clip_rect, contents_rect));
+}
+
 }  // namespace views