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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/widget/drop_helper.h"
#include <memory>
#include <set>
#include <utility>
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/base/dragdrop/drop_target_event.h"
#include "ui/base/dragdrop/mojom/drag_drop_types.mojom.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/compositor/layer_tree_owner.h"
#include "ui/gfx/geometry/point.h"
#include "ui/views/test/views_test_base.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
namespace views {
namespace {
// A view implementation for validating drop location.
class TestDropTargetView : public views::View {
METADATA_HEADER(TestDropTargetView, View)
public:
TestDropTargetView() : drop_location_(-1, -1) {}
bool GetDropFormats(
int* formats,
std::set<ui::ClipboardFormatType>* format_types) override {
*formats = ui::OSExchangeData::STRING;
return true;
}
bool CanDrop(const OSExchangeData& data) override { return true; }
int OnDragUpdated(const ui::DropTargetEvent& event) override {
return static_cast<int>(ui::mojom::DragOperation::kCopy);
}
gfx::Point drop_location() { return drop_location_; }
DropCallback GetDropCallback(const ui::DropTargetEvent& event) override {
return base::BindOnce(&TestDropTargetView::PerformDrop,
base::Unretained(this));
}
private:
gfx::Point drop_location_;
void PerformDrop(const ui::DropTargetEvent& event,
ui::mojom::DragOperation& output_drag_op,
std::unique_ptr<ui::LayerTreeOwner> drag_image_layer_owner) {
drop_location_ = event.location();
output_drag_op = ui::mojom::DragOperation::kCopy;
}
};
BEGIN_METADATA(TestDropTargetView)
END_METADATA
class DropHelperTest : public ViewsTestBase {
public:
DropHelperTest() = default;
~DropHelperTest() override = default;
};
// Verifies that drop coordinates are dispatched in View coordinates.
TEST_F(DropHelperTest, DropCoordinates) {
// Create widget
Widget widget;
Widget::InitParams init_params(
CreateParams(Widget::InitParams::TYPE_WINDOW_FRAMELESS));
init_params.ownership = Widget::InitParams::CLIENT_OWNS_WIDGET;
widget.Init(std::move(init_params));
// Setup a widget with a view that isn't aligned with the corner. In screen
// coordinates, the target view starts at (120, 80) and ends at (220, 130).
gfx::Rect bounds(100, 50, 200, 100);
widget.SetBounds(bounds);
views::View* container =
widget.SetContentsView(std::make_unique<views::View>());
TestDropTargetView* drop_target =
container->AddChildView(std::make_unique<TestDropTargetView>());
drop_target->SetBounds(20, 30, 100, 50);
widget.Show();
auto drop_helper = std::make_unique<DropHelper>(widget.GetRootView());
// Construct drag data
auto data = std::make_unique<ui::OSExchangeData>();
data->SetString(u"Drag and drop is cool");
int drag_operation = static_cast<int>(ui::mojom::DragOperation::kCopy);
gfx::Point enter_location = {10, 0};
// Enter parent view
drop_helper->OnDragOver(*data, enter_location, drag_operation);
// Location of center of target view in root.
gfx::Point target = {70, 55};
// Enter target view
drop_helper->OnDragOver(*data, target, drag_operation);
// Start drop.
DropHelper::DropCallback callback =
drop_helper->GetDropCallback(*data, target, drag_operation);
ASSERT_TRUE(callback);
// Perform the drop.
ui::mojom::DragOperation output_op = ui::mojom::DragOperation::kNone;
std::move(callback).Run(std::move(data), output_op,
/*drag_image_layer_owner=*/nullptr);
// The test view always executes a copy operation.
EXPECT_EQ(output_op, ui::mojom::DragOperation::kCopy);
// Verify the location of the drop is centered in the target view.
EXPECT_EQ(drop_target->drop_location(), gfx::Point(50, 25));
}
} // namespace
} // namespace views
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