Clean up PointIsClippedBySurfaceOrClipRect

cc/trees/layer_tree_impl_unittest.cc

 // Copyright 2014 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 "cc/trees/layer_tree_impl.h"
 
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 1099 matching lines @@
 
   // At (20, 51), child1 and grand_child1 overlap. grand_child1 is expected to
   // be on top.
   test_point = gfx::Point(20, 51);
   result_layer =
       host_impl().active_tree()->FindLayerThatIsHitByPoint(test_point);
   ASSERT_TRUE(result_layer);
   EXPECT_EQ(4, result_layer->id());
 }
 
+TEST_F(LayerTreeImplTest, HitTestingRespectsClipParents) {
+  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl().active_tree(), 1);
+  gfx::Transform identity_matrix;
+  gfx::Point3F transform_origin;
+  gfx::PointF position;
+  gfx::Size bounds(100, 100);
+  SetLayerPropertiesForTesting(root.get(),
+                               identity_matrix,
+                               transform_origin,
+                               position,
+                               bounds,
+                               true,
+                               false);
+  root->SetDrawsContent(true);
+  {
+    scoped_ptr<LayerImpl> child =
+        LayerImpl::Create(host_impl().active_tree(), 2);
+    scoped_ptr<LayerImpl> grand_child =
+        LayerImpl::Create(host_impl().active_tree(), 4);
+
+    position = gfx::PointF(10.f, 10.f);
+    bounds = gfx::Size(1, 1);
+    SetLayerPropertiesForTesting(child.get(),
+                                 identity_matrix,
+                                 transform_origin,
+                                 position,
+                                 bounds,
+                                 true,
+                                 false);
+    child->SetDrawsContent(true);
+    child->SetMasksToBounds(true);
+
+    position = gfx::PointF(0.f, 40.f);
+    bounds = gfx::Size(100, 50);
+    SetLayerPropertiesForTesting(grand_child.get(),
+                                 identity_matrix,
+                                 transform_origin,
+                                 position,
+                                 bounds,
+                                 true,
+                                 false);
+    grand_child->SetDrawsContent(true);
+    grand_child->SetForceRenderSurface(true);
+
+    // This should let |grand_child| "escape" |child|'s clip.
+    grand_child->SetClipParent(root.get());
+
+    child->AddChild(grand_child.Pass());
+    root->AddChild(child.Pass());
+  }
+
+  host_impl().SetViewportSize(root->bounds());
+  host_impl().active_tree()->SetRootLayer(root.Pass());
+  host_impl().active_tree()->UpdateDrawProperties();
+
+  gfx::Point test_point = gfx::Point(12, 52);
+  LayerImpl* result_layer =
+      host_impl().active_tree()->FindLayerThatIsHitByPoint(test_point);
+  ASSERT_TRUE(result_layer);
+  EXPECT_EQ(4, result_layer->id());
+}
+
+TEST_F(LayerTreeImplTest, HitTestingRespectsScrollParents) {
+  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl().active_tree(), 1);
+  gfx::Transform identity_matrix;
+  gfx::Point3F transform_origin;
+  gfx::PointF position;
+  gfx::Size bounds(100, 100);
+  SetLayerPropertiesForTesting(root.get(),
+                               identity_matrix,
+                               transform_origin,
+                               position,
+                               bounds,
+                               true,
+                               false);
+  root->SetDrawsContent(true);
+  {
+    scoped_ptr<LayerImpl> child =
+        LayerImpl::Create(host_impl().active_tree(), 2);
+    scoped_ptr<LayerImpl> scroll_child =
+        LayerImpl::Create(host_impl().active_tree(), 3);
+    scoped_ptr<LayerImpl> grand_child =
+        LayerImpl::Create(host_impl().active_tree(), 4);
+
+    position = gfx::PointF(10.f, 10.f);
+    bounds = gfx::Size(1, 1);
+    SetLayerPropertiesForTesting(child.get(),
+                                 identity_matrix,
+                                 transform_origin,
+                                 position,
+                                 bounds,
+                                 true,
+                                 false);
+    child->SetDrawsContent(true);
+    child->SetMasksToBounds(true);
+
+    position = gfx::PointF();
+    bounds = gfx::Size(200, 200);
+    SetLayerPropertiesForTesting(scroll_child.get(),
+                                 identity_matrix,
+                                 transform_origin,
+                                 position,
+                                 bounds,
+                                 true,
+                                 false);
+    scroll_child->SetDrawsContent(true);
+
+    // This should cause scroll child and its descendants to be affected by
+    // |child|'s clip.
+    scroll_child->SetScrollParent(child.get());
+
+    SetLayerPropertiesForTesting(grand_child.get(),
+                                 identity_matrix,
+                                 transform_origin,
+                                 position,
+                                 bounds,
+                                 true,
+                                 false);
+    grand_child->SetDrawsContent(true);
+    grand_child->SetForceRenderSurface(true);
+
+    scroll_child->AddChild(grand_child.Pass());
+    root->AddChild(scroll_child.Pass());
+    root->AddChild(child.Pass());
+  }
+
+  host_impl().SetViewportSize(root->bounds());
+  host_impl().active_tree()->SetRootLayer(root.Pass());
+  host_impl().active_tree()->UpdateDrawProperties();
+
+  gfx::Point test_point = gfx::Point(12, 52);
+  LayerImpl* result_layer =
+      host_impl().active_tree()->FindLayerThatIsHitByPoint(test_point);
+  // The |test_point| should have been clipped away by |child|, the scroll
+  // parent, so the only thing that should be hit is |root|.
+  ASSERT_TRUE(result_layer);
+  ASSERT_EQ(1, result_layer->id());
+}
 TEST_F(LayerTreeImplTest, HitTestingForMultipleLayerLists) {
   //
   // The geometry is set up similarly to the previous case, but
   // all layers are forced to be render surfaces now.
   //
   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl().active_tree(), 1);
 
   gfx::Transform identity_matrix;
   gfx::Point3F transform_origin;
   gfx::PointF position;
@@ skipping 797 matching lines @@
 
   test_point = gfx::Point(35, 65);
   result_layer =
       host_impl().active_tree()->FindLayerThatIsHitByPointInTouchHandlerRegion(
           test_point);
   EXPECT_FALSE(result_layer);
 }
 
 }  // namespace
 }  // namespace cc