blob: 5b6918c2f004107f5824e9a3c7f7469e11962658 [file] [log] [blame]
// 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.
#include <string>
#include <vector>
#include "base/containers/flat_set.h"
#include "components/exo/data_offer.h"
namespace base {
class TimeTicks;
namespace gfx {
class PointF;
namespace exo {
class DataDevice;
class Surface;
enum class DndAction;
// Handles events on data devices in context-specific ways.
class DataDeviceDelegate {
// Called at the top of the data device's destructor, to give observers a
// chance to remove themselves.
virtual void OnDataDeviceDestroying(DataDevice* data_device) = 0;
// Called when DataOffer object is delivered from a client. DataDeviceDelegate
// has responsibility to release the returned DataOffer object.
virtual DataOffer* OnDataOffer(DataOffer::Purpose purpose) = 0;
// Called during a drag operation when pointer enters |surface|.
virtual void OnEnter(Surface* surface,
const gfx::PointF& location,
const DataOffer& data_offer) = 0;
// Called during a drag operation when pointer leaves |surface|.
virtual void OnLeave() = 0;
// Called during a drag operation when pointer moves on the |surface|.
virtual void OnMotion(base::TimeTicks time_stamp,
const gfx::PointF& location) = 0;
// Called during a drag operation when user drops dragging data on the
// |surface|.
virtual void OnDrop() = 0;
// Called when the data is pasted on the DataDevice.
virtual void OnSelection(const DataOffer& data_offer) = 0;
// This should return true if |surface| is a valid target for this data
// device. E.g. the surface is owned by the same client as the data device.
virtual bool CanAcceptDataEventsForSurface(Surface* surface) = 0;
virtual ~DataDeviceDelegate() {}
} // namespace exo