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// Copyright 2017 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.
#ifndef COMPONENTS_EXO_DATA_DEVICE_H_
#define COMPONENTS_EXO_DATA_DEVICE_H_
#include <cstdint>
#include "base/memory/weak_ptr.h"
#include "components/exo/data_offer_observer.h"
#include "components/exo/seat_observer.h"
#include "components/exo/surface.h"
#include "components/exo/surface_observer.h"
#include "ui/base/clipboard/clipboard_observer.h"
#include "ui/base/dragdrop/mojom/drag_drop_types.mojom-forward.h"
namespace ui {
class DropTargetEvent;
}
namespace exo {
class DataDeviceDelegate;
class DataOffer;
class ScopedDataOffer;
class DataSource;
class Seat;
class ScopedSurface;
enum class DndAction { kNone, kCopy, kMove, kAsk };
// DataDevice to start drag and drop and copy and paste oprations.
class DataDevice : public WMHelper::DragDropObserver,
public DataOfferObserver,
public ui::ClipboardObserver,
public SurfaceObserver,
public SeatObserver {
public:
DataDevice(DataDeviceDelegate* delegate, Seat* seat);
DataDevice(const DataDevice&) = delete;
DataDevice& operator=(const DataDevice&) = delete;
~DataDevice() override;
// Starts drag-and-drop operation.
// |source| represents data comes from the client starting drag operation. Can
// be null if the data will be transferred only in the client. |origin| is
// the surface which starts the drag and drop operation. |icon| is the
// nullable image which is rendered at the next to cursor while drag
// operation.
void StartDrag(DataSource* source,
Surface* origin,
Surface* icon,
ui::mojom::DragEventSource event_source);
// Sets selection data to the clipboard.
// |source| represents data comes from the client.
void SetSelection(DataSource* source);
// Overridden from WMHelper::DragDropObserver:
void OnDragEntered(const ui::DropTargetEvent& event) override;
aura::client::DragUpdateInfo OnDragUpdated(
const ui::DropTargetEvent& event) override;
void OnDragExited() override;
WMHelper::DragDropObserver::DropCallback GetDropCallback() override;
// Overridden from ui::ClipboardObserver:
void OnClipboardDataChanged() override;
// Overridden from SeatObserver:
void OnSurfaceFocused(Surface* surface,
Surface* lost_focus,
bool has_focused_client) override;
// Overridden from DataOfferObserver:
void OnDataOfferDestroying(DataOffer* data_offer) override;
// Overridden from SurfaceObserver:
void OnSurfaceDestroying(Surface* surface) override;
DataDeviceDelegate* get_delegate() { return delegate_; }
private:
Surface* GetEffectiveTargetForEvent(const ui::DropTargetEvent& event) const;
void SetSelectionToCurrentClipboardData();
void PerformDropOrExitDrag(base::ScopedClosureRunner exit_drag,
ui::mojom::DragOperation& output_drag_op);
DataDeviceDelegate* const delegate_;
Seat* const seat_;
std::unique_ptr<ScopedDataOffer> data_offer_;
std::unique_ptr<ScopedSurface> focused_surface_;
base::OnceClosure quit_closure_;
bool drop_succeeded_;
base::WeakPtrFactory<DataDevice> drop_weak_factory_{this};
base::WeakPtrFactory<DataDevice> weak_factory_{this};
};
} // namespace exo
#endif // COMPONENTS_EXO_DATA_DEVICE_H_
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