Set layer scroll data from PaintArtifactCompositor

third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp

 // Copyright 2016 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 "platform/graphics/compositing/PaintArtifactCompositor.h"
 
 #include <memory>
 
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "cc/layers/layer.h"
 #include "cc/test/fake_compositor_frame_sink.h"
 #include "cc/test/geometry_test_utils.h"
 #include "cc/trees/clip_node.h"
 #include "cc/trees/effect_node.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "cc/trees/scroll_node.h"
 #include "cc/trees/transform_node.h"
 #include "platform/graphics/paint/EffectPaintPropertyNode.h"
 #include "platform/graphics/paint/GeometryMapper.h"
 #include "platform/graphics/paint/PaintArtifact.h"
 #include "platform/graphics/paint/ScrollPaintPropertyNode.h"
 #include "platform/testing/PaintPropertyTestHelpers.h"
 #include "platform/testing/PictureMatchers.h"
 #include "platform/testing/RuntimeEnabledFeaturesTestHelpers.h"
 #include "platform/testing/TestPaintArtifact.h"
 #include "platform/testing/WebLayerTreeViewImplForTesting.h"
+#include "public/platform/WebLayerScrollClient.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 #define EXPECT_BLINK_FLOAT_RECT_EQ(expected, actual)         \
   do {                                                       \
     EXPECT_FLOAT_EQ((expected).x(), (actual).x());           \
     EXPECT_FLOAT_EQ((expected).y(), (actual).y());           \
     EXPECT_FLOAT_EQ((expected).width(), (actual).width());   \
@@ skipping 620 matching lines @@
 
   const cc::EffectNode& convertedEffect3 = *effectTree.Node(4);
   EXPECT_EQ(convertedRootEffect.id, convertedEffect3.parent_id);
   EXPECT_FLOAT_EQ(0.2, convertedEffect3.opacity);
 
   EXPECT_EQ(convertedEffect2.id, contentLayerAt(0)->effect_tree_index());
   EXPECT_EQ(convertedEffect1.id, contentLayerAt(1)->effect_tree_index());
   EXPECT_EQ(convertedEffect3.id, contentLayerAt(2)->effect_tree_index());
 }
 
+class FakeScrollClient : public WebLayerScrollClient {
+ public:
+  FakeScrollClient() : didScrollCount(0) {}
+
+  void didScroll(const gfx::ScrollOffset& scrollOffset) final {
+    didScrollCount++;
+    lastScrollOffset = scrollOffset;
+  };
+
+  gfx::ScrollOffset lastScrollOffset;
+  unsigned didScrollCount;
+};
+
 TEST_F(PaintArtifactCompositorTestWithPropertyTrees, OneScrollNode) {
+  FakeScrollClient scrollClient;
+
   CompositorElementId expectedCompositorElementId = CompositorElementId(2, 0);
   RefPtr<TransformPaintPropertyNode> scrollTranslation =
       TransformPaintPropertyNode::createScrollTranslation(
           TransformPaintPropertyNode::root(),
           TransformationMatrix().translate(7, 9), FloatPoint3D(), false, 0,
           CompositingReasonNone, expectedCompositorElementId,
           ScrollPaintPropertyNode::root(), IntSize(11, 13), IntSize(27, 31),
-          true, false, 0 /* mainThreadScrollingReasons */);
+          true, false, 0 /* mainThreadScrollingReasons */, &scrollClient);
 
   TestPaintArtifact artifact;
   artifact
       .chunk(scrollTranslation, ClipPaintPropertyNode::root(),
              EffectPaintPropertyNode::root())
       .rectDrawing(FloatRect(11, 13, 17, 19), Color::white);
   update(artifact.build());
 
   const cc::ScrollTree& scrollTree = propertyTrees().scroll_tree;
   // Node #0 reserved for null; #1 for root render surface.
@@ skipping 10 matching lines @@
   EXPECT_EQ(expectedCompositorElementId, contentLayerAt(0)->element_id());
 
   const cc::TransformTree& transformTree = propertyTrees().transform_tree;
   const cc::TransformNode& transformNode =
       *transformTree.Node(scrollNode.transform_id);
   EXPECT_TRUE(transformNode.local.IsIdentity());
   EXPECT_EQ(gfx::ScrollOffset(-7, -9), transformNode.scroll_offset);
 
   EXPECT_EQ(MainThreadScrollingReason::kNotScrollingOnMain,
             scrollNode.main_thread_scrolling_reasons);
+
+  auto* layer = contentLayerAt(0);
+  EXPECT_EQ(layer->id(), scrollNode.owning_layer_id);
+  auto scrollNodeIndexIt =
+      propertyTrees().layer_id_to_scroll_node_index.find(layer->id());
+  EXPECT_EQ(scrollNodeIndexIt->second, scrollNode.id);
+
+  EXPECT_EQ(0u, scrollClient.didScrollCount);
+  layer->SetScrollOffsetFromImplSide(gfx::ScrollOffset(1, 2));
+  EXPECT_EQ(1u, scrollClient.didScrollCount);
+  EXPECT_EQ(gfx::ScrollOffset(1, 2), scrollClient.lastScrollOffset);
 }
 
 TEST_F(PaintArtifactCompositorTestWithPropertyTrees, TransformUnderScrollNode) {
   RefPtr<TransformPaintPropertyNode> scrollTranslation =
       TransformPaintPropertyNode::createScrollTranslation(
           TransformPaintPropertyNode::root(),
           TransformationMatrix().translate(7, 9), FloatPoint3D(), false, 0,
           CompositingReasonNone, CompositorElementId(),
           ScrollPaintPropertyNode::root(), IntSize(11, 13), IntSize(27, 31),
-          true, false, 0 /* mainThreadScrollingReasons */);
+          true, false, 0 /* mainThreadScrollingReasons */, nullptr);
 
   RefPtr<TransformPaintPropertyNode> transform =
       TransformPaintPropertyNode::create(
           scrollTranslation, TransformationMatrix(), FloatPoint3D(), false, 0,
           CompositingReason3DTransform);
 
   TestPaintArtifact artifact;
   artifact
       .chunk(scrollTranslation, ClipPaintPropertyNode::root(),
              EffectPaintPropertyNode::root())
@@ skipping 24 matching lines @@
   RefPtr<EffectPaintPropertyNode> effect =
       createOpacityOnlyEffect(EffectPaintPropertyNode::root(), 0.5);
 
   CompositorElementId expectedCompositorElementIdA = CompositorElementId(2, 0);
   RefPtr<TransformPaintPropertyNode> scrollTranslationA =
       TransformPaintPropertyNode::createScrollTranslation(
           TransformPaintPropertyNode::root(),
           TransformationMatrix().translate(11, 13), FloatPoint3D(), false, 0,
           CompositingReasonNone, expectedCompositorElementIdA,
           ScrollPaintPropertyNode::root(), IntSize(2, 3), IntSize(5, 7), false,
-          true,
-          MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects);
+          true, MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects,
+          nullptr);
 
   CompositorElementId expectedCompositorElementIdB = CompositorElementId(3, 0);
   RefPtr<TransformPaintPropertyNode> scrollTranslationB =
       TransformPaintPropertyNode::createScrollTranslation(
           scrollTranslationA, TransformationMatrix().translate(37, 41),
           FloatPoint3D(), false, 0, CompositingReasonNone,
           expectedCompositorElementIdB, scrollTranslationA->scrollNode(),
           IntSize(19, 23), IntSize(29, 31), true, false,
-          0 /* mainThreadScrollingReasons */);
+          0 /* mainThreadScrollingReasons */, nullptr);
   TestPaintArtifact artifact;
   artifact.chunk(scrollTranslationA, ClipPaintPropertyNode::root(), effect)
       .rectDrawing(FloatRect(7, 11, 13, 17), Color::white);
   artifact.chunk(scrollTranslationB, ClipPaintPropertyNode::root(), effect)
       .rectDrawing(FloatRect(1, 2, 3, 5), Color::white);
   update(artifact.build());
 
   const cc::ScrollTree& scrollTree = propertyTrees().scroll_tree;
   // Node #0 reserved for null; #1 for root render surface.
   ASSERT_EQ(3u, scrollTree.size());
@@ skipping 901 matching lines @@
   artifact
       .chunk(TransformPaintPropertyNode::root(), ClipPaintPropertyNode::root(),
              effect.get())
       .rectDrawing(FloatRect(100, 100, 200, 100), Color::black);
   update(artifact.build());
 
   EXPECT_EQ(2, elementIdToEffectNodeIndex(expectedCompositorElementId));
 }
 
 }  // namespace blink