[Android] Disable pull-to-refresh with overflow:hidden

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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_host_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 1826 matching lines @@
   DrawFrame();
   {
     CompositorFrameMetadata metadata =
         host_impl_->MakeCompositorFrameMetadata();
     EXPECT_EQ(gfx::Vector2dF(), metadata.root_scroll_offset);
     EXPECT_EQ(1.f, metadata.page_scale_factor);
     EXPECT_EQ(gfx::SizeF(50.f, 50.f), metadata.scrollable_viewport_size);
     EXPECT_EQ(gfx::SizeF(100.f, 100.f), metadata.root_layer_size);
     EXPECT_EQ(0.5f, metadata.min_page_scale_factor);
     EXPECT_EQ(4.f, metadata.max_page_scale_factor);
+    EXPECT_FALSE(metadata.root_overflow_x_hidden);
+    EXPECT_FALSE(metadata.root_overflow_y_hidden);
   }
 
   // Scrolling should update metadata immediately.
   EXPECT_EQ(InputHandler::ScrollStarted,
             host_impl_->ScrollBegin(gfx::Point(), InputHandler::Wheel));
   host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
   {
     CompositorFrameMetadata metadata =
         host_impl_->MakeCompositorFrameMetadata();
     EXPECT_EQ(gfx::Vector2dF(0.f, 10.f), metadata.root_scroll_offset);
   }
   host_impl_->ScrollEnd();
   {
     CompositorFrameMetadata metadata =
         host_impl_->MakeCompositorFrameMetadata();
     EXPECT_EQ(gfx::Vector2dF(0.f, 10.f), metadata.root_scroll_offset);
   }
 
+  // Root "overflow: hidden" properties should be reflected.
+  {
+    host_impl_->active_tree()
+        ->InnerViewportScrollLayer()
+        ->set_user_scrollable_horizontal(false);
+    CompositorFrameMetadata metadata =
+        host_impl_->MakeCompositorFrameMetadata();
+    EXPECT_TRUE(metadata.root_overflow_x_hidden);
+    EXPECT_FALSE(metadata.root_overflow_y_hidden);
+
+    host_impl_->active_tree()
+        ->InnerViewportScrollLayer()
+        ->set_user_scrollable_vertical(false);
+    metadata = host_impl_->MakeCompositorFrameMetadata();
+    EXPECT_TRUE(metadata.root_overflow_x_hidden);
+    EXPECT_TRUE(metadata.root_overflow_y_hidden);
+  }
+
   // Page scale should update metadata correctly (shrinking only the viewport).
   host_impl_->ScrollBegin(gfx::Point(), InputHandler::Gesture);
   host_impl_->PinchGestureBegin();
   host_impl_->PinchGestureUpdate(2.f, gfx::Point());
   host_impl_->PinchGestureEnd();
   host_impl_->ScrollEnd();
   {
     CompositorFrameMetadata metadata =
         host_impl_->MakeCompositorFrameMetadata();
     EXPECT_EQ(gfx::Vector2dF(0.f, 10.f), metadata.root_scroll_offset);
@@ skipping 6068 matching lines @@
     ExpectContains(*scroll_info, child_scroll->id(), scroll_delta);
     ExpectContains(*scroll_info, inner_scroll->id(), scroll_delta);
 
     // As the locked layer is at its limit, no further scrolling can occur.
     EXPECT_FALSE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
     EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), inner_scroll);
     host_impl_->ScrollEnd();
   }
 }
 
+TEST_F(LayerTreeHostImplVirtualViewportTest,
+       NoOverscrollWhenRootMarkedNonUserScrollable) {
+  gfx::Size content_size = gfx::Size(100, 160);
+  gfx::Size outer_viewport = gfx::Size(50, 80);
+  gfx::Size inner_viewport = gfx::Size(25, 40);
+
+  SetupVirtualViewportLayers(content_size, outer_viewport, inner_viewport);
+
+  LayerImpl* outer_scroll = host_impl_->OuterViewportScrollLayer();
+  outer_scroll->set_user_scrollable_vertical(false);
+
+  InputHandlerScrollResult scroll_result;
+  DrawFrame();
+  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
+
+  // In-bounds scrolling does not affect overscroll.
+  EXPECT_EQ(InputHandler::ScrollStarted,
+            host_impl_->ScrollBegin(gfx::Point(), InputHandler::Gesture));
+  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
+  EXPECT_TRUE(scroll_result.did_scroll);
+  EXPECT_FALSE(scroll_result.did_overscroll_root);
+  EXPECT_EQ(gfx::Vector2dF(), scroll_result.unused_scroll_delta);
+  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
+
+  // As the outer viewport is marked as non-scrollable on the y-axis,
+  // overscroll reporting should be suppressed, and indicated as such.
+  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 50));
+  EXPECT_TRUE(scroll_result.did_scroll);
+  EXPECT_FALSE(scroll_result.did_overscroll_root);
+  EXPECT_EQ(gfx::Vector2dF(), scroll_result.unused_scroll_delta);
+  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
+
+  // Repeated overscrolls should also be suppressed.
+  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 50));
+  EXPECT_FALSE(scroll_result.did_scroll);
+  EXPECT_FALSE(scroll_result.did_overscroll_root);
+  EXPECT_EQ(gfx::Vector2dF(), scroll_result.unused_scroll_delta);
+  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
+
+  // Scrolling the inner viewport back up should be possible.
+  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -10));
+  EXPECT_TRUE(scroll_result.did_scroll);
+  EXPECT_FALSE(scroll_result.did_overscroll_root);
+  EXPECT_EQ(gfx::Vector2dF(), scroll_result.unused_scroll_delta);
+  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
+
+  host_impl_->ScrollEnd();
+}
+
 class LayerTreeHostImplWithImplicitLimitsTest : public LayerTreeHostImplTest {
  public:
   void SetUp() override {
     LayerTreeSettings settings = DefaultSettings();
     settings.max_memory_for_prepaint_percentage = 50;
     CreateHostImpl(settings, CreateOutputSurface());
   }
 };
 
 TEST_F(LayerTreeHostImplWithImplicitLimitsTest, ImplicitMemoryLimits) {
@@ skipping 252 matching lines @@
   // surface.
   EXPECT_EQ(0, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_EQ(1, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_LE(1, num_lost_surfaces_);
 }
 
 }  // namespace
 }  // namespace cc