// Copyright 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 "cc/test/layer_tree_json_parser.h"

#include "cc/layers/layer.h"
#include "cc/test/fake_impl_proxy.h"
#include "cc/test/fake_layer_tree_host.h"
#include "cc/test/fake_layer_tree_host_impl.h"
#include "cc/test/geometry_test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {

namespace {

bool LayerTreesMatch(LayerImpl* const layer_impl,
                     Layer* const layer) {
#define RETURN_IF_EXPECTATION_FAILS(exp) \
  do { \
    exp; \
    if (testing::UnitTest::GetInstance()->current_test_info()-> \
            result()->Failed()) \
      return false; \
  } while (0)

  RETURN_IF_EXPECTATION_FAILS(EXPECT_EQ(layer_impl->children().size(),
                                        layer->children().size()));
  RETURN_IF_EXPECTATION_FAILS(EXPECT_EQ(layer_impl->bounds(), layer->bounds()));
  RETURN_IF_EXPECTATION_FAILS(
      EXPECT_EQ(layer_impl->position(), layer->position()));
  RETURN_IF_EXPECTATION_FAILS(
      EXPECT_TRANSFORMATION_MATRIX_EQ(layer_impl->draw_transform(),
                                      layer->draw_transform()));
  RETURN_IF_EXPECTATION_FAILS(EXPECT_EQ(layer_impl->contents_opaque(),
                                        layer->contents_opaque()));
  RETURN_IF_EXPECTATION_FAILS(EXPECT_EQ(layer_impl->scrollable(),
                                        layer->scrollable()));
  RETURN_IF_EXPECTATION_FAILS(EXPECT_FLOAT_EQ(layer_impl->opacity(),
                                              layer->opacity()));
  RETURN_IF_EXPECTATION_FAILS(EXPECT_EQ(layer_impl->have_wheel_event_handlers(),
                                        layer->have_wheel_event_handlers()));
  RETURN_IF_EXPECTATION_FAILS(
      EXPECT_EQ(layer_impl->have_scroll_event_handlers(),
                layer->have_scroll_event_handlers()));
  RETURN_IF_EXPECTATION_FAILS(
      EXPECT_EQ(layer_impl->touch_event_handler_region(),
                layer->touch_event_handler_region()));

  for (size_t i = 0; i < layer_impl->children().size(); ++i) {
    RETURN_IF_EXPECTATION_FAILS(EXPECT_TRUE(LayerTreesMatch(
        layer_impl->children()[i], layer->children()[i].get())));
  }

  return true;
#undef RETURN_IF_EXPECTATION_FAILS
}

}  // namespace

class LayerTreeJsonParserSanityCheck : public testing::Test {
};

TEST_F(LayerTreeJsonParserSanityCheck, Basic) {
  FakeImplProxy proxy;
  TestSharedBitmapManager shared_bitmap_manager;
  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager);
  LayerTreeImpl* tree = host_impl.active_tree();

  scoped_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));
  scoped_ptr<LayerImpl> parent(LayerImpl::Create(tree, 2));
  scoped_ptr<LayerImpl> child(LayerImpl::Create(tree, 3));

  root_impl->SetBounds(gfx::Size(100, 100));
  parent->SetBounds(gfx::Size(50, 50));
  child->SetBounds(gfx::Size(40, 40));

  parent->SetPosition(gfx::Point(25, 25));

  child->SetHaveWheelEventHandlers(true);
  child->SetHaveScrollEventHandlers(true);

  parent->AddChild(child.Pass());
  root_impl->AddChild(parent.Pass());
  tree->SetRootLayer(root_impl.Pass());

  std::string json = host_impl.LayerTreeAsJson();
  scoped_refptr<Layer> root = ParseTreeFromJson(json, NULL);
  ASSERT_TRUE(root.get());
  EXPECT_TRUE(LayerTreesMatch(host_impl.RootLayer(), root.get()));
}

TEST_F(LayerTreeJsonParserSanityCheck, EventHandlerRegions) {
  FakeImplProxy proxy;
  TestSharedBitmapManager shared_bitmap_manager;
  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager);
  LayerTreeImpl* tree = host_impl.active_tree();

  scoped_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));
  scoped_ptr<LayerImpl> touch_layer(LayerImpl::Create(tree, 2));

  root_impl->SetBounds(gfx::Size(100, 100));
  touch_layer->SetBounds(gfx::Size(50, 50));

  Region touch_region;
  touch_region.Union(gfx::Rect(10, 10, 20, 30));
  touch_region.Union(gfx::Rect(40, 10, 20, 20));
  touch_layer->SetTouchEventHandlerRegion(touch_region);

  root_impl->AddChild(touch_layer.Pass());
  tree->SetRootLayer(root_impl.Pass());

  std::string json = host_impl.LayerTreeAsJson();
  scoped_refptr<Layer> root = ParseTreeFromJson(json, NULL);
  ASSERT_TRUE(root.get());
  EXPECT_TRUE(LayerTreesMatch(host_impl.RootLayer(), root.get()));
}

}  // namespace cc