| // 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/macros.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 "components/exo/wm_helper.h" |
| #include "ui/base/clipboard/clipboard_observer.h" |
| |
| namespace ui { |
| class DropTargetEvent; |
| } |
| |
| namespace exo { |
| |
| class DataDeviceDelegate; |
| class DataOffer; |
| class DataSource; |
| class FileHelper; |
| class Seat; |
| |
| enum class DndAction { kNone, kCopy, kMove, kAsk }; |
| |
| class ScopedDataOffer; |
| class ScopedSurface; |
| |
| // 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: |
| explicit DataDevice(DataDeviceDelegate* delegate, |
| Seat* seat, |
| FileHelper* file_helper); |
| ~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. |serial| is the unique number comes from input events which |
| // triggers the drag and drop operation. |
| void StartDrag(const DataSource* source, |
| Surface* origin, |
| Surface* icon, |
| uint32_t serial); |
| |
| // Sets selection data to the clipboard. |
| // |source| represents data comes from the client. |serial| is the unique |
| // number comes from input events which triggers the drag and drop operation. |
| void SetSelection(DataSource* source, uint32_t serial); |
| |
| // Overridden from WMHelper::DragDropObserver: |
| void OnDragEntered(const ui::DropTargetEvent& event) override; |
| int OnDragUpdated(const ui::DropTargetEvent& event) override; |
| void OnDragExited() override; |
| int OnPerformDrop(const ui::DropTargetEvent& event) override; |
| |
| // Overridden from ui::ClipbaordObserver: |
| void OnClipboardDataChanged() override; |
| |
| // Overridden from SeatObserver: |
| void OnSurfaceFocusing(Surface* surface) override; |
| void OnSurfaceFocused(Surface* surface) override; |
| |
| // Overridden from DataOfferObserver: |
| void OnDataOfferDestroying(DataOffer* data_offer) override; |
| |
| // Overridden from SurfaceObserver: |
| void OnSurfaceDestroying(Surface* surface) override; |
| |
| private: |
| Surface* GetEffectiveTargetForEvent(const ui::DropTargetEvent& event) const; |
| void SetSelectionToCurrentClipboardData(); |
| |
| DataDeviceDelegate* const delegate_; |
| Seat* const seat_; |
| FileHelper* const file_helper_; |
| std::unique_ptr<ScopedDataOffer> data_offer_; |
| std::unique_ptr<ScopedSurface> focused_surface_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DataDevice); |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_DATA_DEVICE_H_ |