Move MaxScrollOffset to property_trees

cc/trees/layer_tree_host_common_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_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 9930 matching lines @@
   scroll_and_scale_set.ToProtobuf(&proto);
   ScrollAndScaleSet new_scroll_and_scale_set;
   new_scroll_and_scale_set.FromProtobuf(proto);
 
   EXPECT_TRUE(scroll_and_scale_set.EqualsForTesting(new_scroll_and_scale_set));
 }
 
 TEST_F(LayerTreeHostCommonTest, ScrollTreeBuilderTest) {
   // Test the behavior of scroll tree builder
   // Topology:
-  // +root1(1)
-  // +--parent2(2)[kHasBackgroundAttachmentFixedObjects|kScrollbarScrolling &
-  // scrollable]
-  // +----child6(6)[kScrollbarScrolling]
-  // +------grand_child10(10)[kScrollbarScrolling]
-  // +--parent3(3)
-  // +----child7(7)[scrollable]
-  // +----child8(8)[scroll_parent=7]
-  // +------grand_child11(11)[scrollable]
-  // +--parent4(4)
-  // +----child9(9)
-  // +------grand_child12(12)
-  // +--parent5(5)[contains_non_fast_scrollable_region]
+  // +root1(1)[inner_viewport_container_layer]
+  // +-page_scale_layer
+  // +----parent2(2)[kHasBackgroundAttachmentFixedObjects|kScrollbarScrolling &
+  // scrollable, inner_viewport_scroll_layer]
+  // +------child6(6)[kScrollbarScrolling]
+  // +--------grand_child10(10)[kScrollbarScrolling]
+  // +----parent3(3)
+  // +------child7(7)[scrollable]
+  // +------child8(8)[scroll_parent=7]
+  // +--------grand_child11(11)[scrollable]
+  // +----parent4(4)
+  // +------child9(9)
+  // +--------grand_child12(12)
+  // +----parent5(5)[contains_non_fast_scrollable_region]
   //
   // Expected scroll tree topology:
   // +property_tree_root---owner:-1
   // +--root---owner:1, id:1
   // +----node---owner:2, id:2
   // +------node---owner:6, id:3
   // +----node---owner:7, id:4
   // +------node---owner:11, id:5
   // +----node---owner:5, id:6
   //
   // Extra check:
   //   scroll_tree_index() of:
   //     grand_child10:3
   //     parent3:1
   //     child8:4
   //     parent4:1
   //     child9:1
   //     grand_child12:1
   scoped_refptr<Layer> root1 = Layer::Create(layer_settings());
+  scoped_refptr<Layer> page_scale_layer = Layer::Create(layer_settings());
   scoped_refptr<Layer> parent2 = Layer::Create(layer_settings());
   scoped_refptr<Layer> parent3 = Layer::Create(layer_settings());
   scoped_refptr<Layer> parent4 = Layer::Create(layer_settings());
   scoped_refptr<Layer> parent5 = Layer::Create(layer_settings());
   scoped_refptr<Layer> child6 = Layer::Create(layer_settings());
   scoped_refptr<Layer> child7 = Layer::Create(layer_settings());
   scoped_refptr<Layer> child8 = Layer::Create(layer_settings());
   scoped_refptr<Layer> child9 = Layer::Create(layer_settings());
   scoped_refptr<Layer> grand_child10 = Layer::Create(layer_settings());
   scoped_refptr<Layer> grand_child11 = Layer::Create(layer_settings());
   scoped_refptr<Layer> grand_child12 = Layer::Create(layer_settings());
 
-  root1->AddChild(parent2);
-  root1->AddChild(parent3);
-  root1->AddChild(parent4);
-  root1->AddChild(parent5);
+  root1->AddChild(page_scale_layer);
+  page_scale_layer->AddChild(parent2);
+  page_scale_layer->AddChild(parent3);
+  page_scale_layer->AddChild(parent4);
+  page_scale_layer->AddChild(parent5);
   parent2->AddChild(child6);
   parent3->AddChild(child7);
   parent3->AddChild(child8);
   parent4->AddChild(child9);
   child6->AddChild(grand_child10);
   child8->AddChild(grand_child11);
   child9->AddChild(grand_child12);
   host()->SetRootLayer(root1);
 
   parent2->AddMainThreadScrollingReasons(
       MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects);
   parent2->AddMainThreadScrollingReasons(
       MainThreadScrollingReason::kScrollbarScrolling);
   parent2->SetScrollClipLayerId(root1->id());
   child6->AddMainThreadScrollingReasons(
       MainThreadScrollingReason::kScrollbarScrolling);
   grand_child10->AddMainThreadScrollingReasons(
       MainThreadScrollingReason::kScrollbarScrolling);
 
-  child7->SetScrollClipLayerId(root1->id());
+  child7->SetScrollClipLayerId(parent3->id());
+
   child8->SetScrollParent(child7.get());
-  grand_child11->SetScrollClipLayerId(root1->id());
+  grand_child11->SetScrollClipLayerId(parent3->id());
 
   parent5->SetNonFastScrollableRegion(gfx::Rect(0, 0, 50, 50));
+  parent5->SetBounds(gfx::Size(10, 10));
 
+  host()->RegisterViewportLayers(NULL, page_scale_layer, parent2, NULL);
   ExecuteCalculateDrawPropertiesWithPropertyTrees(root1.get());
 
   const int kInvalidPropertyTreeNodeId = -1;
   const int kRootPropertyTreeNodeId = 0;
 
   // Property tree root
   ScrollTree scroll_tree = host()->property_trees()->scroll_tree;
   ScrollTree expected_scroll_tree;
   ScrollNode* property_tree_root = expected_scroll_tree.Node(0);
   property_tree_root->id = kRootPropertyTreeNodeId;
   property_tree_root->parent_id = kInvalidPropertyTreeNodeId;
   property_tree_root->owner_id = kInvalidPropertyTreeNodeId;
   property_tree_root->data.scrollable = false;
   property_tree_root->data.main_thread_scrolling_reasons =
       MainThreadScrollingReason::kNotScrollingOnMain;
   property_tree_root->data.contains_non_fast_scrollable_region = false;
-  property_tree_root->data.transform_id = kRootPropertyTreeNodeId;
 
   // The node owned by root1
   ScrollNode scroll_root1;
   scroll_root1.id = 1;
   scroll_root1.owner_id = root1->id();
-  scroll_root1.data.transform_id = root1->transform_tree_index();
   expected_scroll_tree.Insert(scroll_root1, 0);
 
   // The node owned by parent2
   ScrollNode scroll_parent2;
   scroll_parent2.id = 2;
   scroll_parent2.owner_id = parent2->id();
   scroll_parent2.data.scrollable = true;
   scroll_parent2.data.main_thread_scrolling_reasons =
       parent2->main_thread_scrolling_reasons();
-  scroll_parent2.data.transform_id = parent2->transform_tree_index();
+  scroll_parent2.data.scroll_clip_layer_bounds = root1->bounds();
+  scroll_parent2.data.bounds = parent2->bounds();
+  scroll_parent2.data.max_scroll_offset_affected_by_page_scale = true;
+  scroll_parent2.data.is_inner_viewport_scroll_layer = true;
   expected_scroll_tree.Insert(scroll_parent2, 1);
 
   // The node owned by child6
   ScrollNode scroll_child6;
   scroll_child6.id = 3;
   scroll_child6.owner_id = child6->id();
   scroll_child6.data.main_thread_scrolling_reasons =
       child6->main_thread_scrolling_reasons();
-  scroll_child6.data.transform_id = child6->transform_tree_index();
   expected_scroll_tree.Insert(scroll_child6, 2);
 
   // The node owned by child7, child7 also owns a transform node
   ScrollNode scroll_child7;
   scroll_child7.id = 4;
   scroll_child7.owner_id = child7->id();
   scroll_child7.data.scrollable = true;
-  scroll_child7.data.transform_id = child7->transform_tree_index();
+  scroll_parent2.data.scroll_clip_layer_bounds = parent3->bounds();
+  scroll_parent2.data.bounds = child7->bounds();
   expected_scroll_tree.Insert(scroll_child7, 1);
 
   // The node owned by grand_child11, grand_child11 also owns a transform node
   ScrollNode scroll_grand_child11;
   scroll_grand_child11.id = 5;
   scroll_grand_child11.owner_id = grand_child11->id();
   scroll_grand_child11.data.scrollable = true;
-  scroll_grand_child11.data.transform_id =
-      grand_child11->transform_tree_index();
   expected_scroll_tree.Insert(scroll_grand_child11, 4);
 
   // The node owned by parent5
   ScrollNode scroll_parent5;
   scroll_parent5.id = 8;
   scroll_parent5.owner_id = parent5->id();
   scroll_parent5.data.contains_non_fast_scrollable_region = true;
-  scroll_parent5.data.transform_id = parent5->transform_tree_index();
+  scroll_parent5.data.bounds = gfx::Size(10, 10);
   expected_scroll_tree.Insert(scroll_parent5, 1);
 
   expected_scroll_tree.set_needs_update(false);
 
   EXPECT_EQ(expected_scroll_tree, scroll_tree);
 
   // Check other layers' scroll_tree_index
+  EXPECT_EQ(scroll_root1.id, page_scale_layer->scroll_tree_index());
   EXPECT_EQ(scroll_child6.id, grand_child10->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent3->scroll_tree_index());
   EXPECT_EQ(scroll_child7.id, child8->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent4->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, child9->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, grand_child12->scroll_tree_index());
 }
 
 }  // namespace
 }  // namespace cc