1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
// 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 "components/exo/data_device.h"
#include "base/run_loop.h"
#include "components/exo/data_device_delegate.h"
#include "components/exo/data_offer.h"
#include "components/exo/data_source.h"
#include "components/exo/seat.h"
#include "components/exo/surface.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/base/clipboard/clipboard_monitor.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/base/dragdrop/drop_target_event.h"
namespace exo {
namespace {
constexpr base::TimeDelta kDataOfferDestructionTimeout =
base::TimeDelta::FromMilliseconds(1000);
ui::DragDropTypes::DragOperation DndActionToDragOperation(
DndAction dnd_action) {
switch (dnd_action) {
case DndAction::kMove:
return ui::DragDropTypes::DRAG_MOVE;
case DndAction::kCopy:
return ui::DragDropTypes::DRAG_COPY;
case DndAction::kAsk:
return ui::DragDropTypes::DRAG_LINK;
case DndAction::kNone:
return ui::DragDropTypes::DRAG_NONE;
}
}
} // namespace
DataDevice::DataDevice(DataDeviceDelegate* delegate,
Seat* seat,
FileHelper* file_helper)
: delegate_(delegate),
seat_(seat),
file_helper_(file_helper),
drop_succeeded_(false) {
WMHelper::GetInstance()->AddDragDropObserver(this);
ui::ClipboardMonitor::GetInstance()->AddObserver(this);
seat_->AddObserver(this);
OnSurfaceFocusing(seat_->GetFocusedSurface());
}
DataDevice::~DataDevice() {
delegate_->OnDataDeviceDestroying(this);
WMHelper::GetInstance()->RemoveDragDropObserver(this);
ui::ClipboardMonitor::GetInstance()->RemoveObserver(this);
seat_->RemoveObserver(this);
}
void DataDevice::StartDrag(DataSource* source,
Surface* origin,
Surface* icon,
ui::DragDropTypes::DragEventSource event_source) {
seat_->StartDrag(source, origin, icon, event_source);
}
void DataDevice::SetSelection(DataSource* source) {
seat_->SetSelection(source);
}
void DataDevice::OnDragEntered(const ui::DropTargetEvent& event) {
DCHECK(!data_offer_);
Surface* surface = GetEffectiveTargetForEvent(event);
if (!surface)
return;
base::flat_set<DndAction> dnd_actions;
if (event.source_operations() & ui::DragDropTypes::DRAG_MOVE) {
dnd_actions.insert(DndAction::kMove);
}
if (event.source_operations() & ui::DragDropTypes::DRAG_COPY) {
dnd_actions.insert(DndAction::kCopy);
}
if (event.source_operations() & ui::DragDropTypes::DRAG_LINK) {
dnd_actions.insert(DndAction::kAsk);
}
data_offer_ = std::make_unique<ScopedDataOffer>(
delegate_->OnDataOffer(DataOffer::DRAG_DROP), this);
data_offer_->get()->SetDropData(file_helper_, event.data());
data_offer_->get()->SetSourceActions(dnd_actions);
data_offer_->get()->SetActions(base::flat_set<DndAction>(), DndAction::kAsk);
delegate_->OnEnter(surface, event.location_f(), *data_offer_->get());
}
int DataDevice::OnDragUpdated(const ui::DropTargetEvent& event) {
if (!data_offer_)
return ui::DragDropTypes::DRAG_NONE;
delegate_->OnMotion(event.time_stamp(), event.location_f());
// TODO(hirono): dnd_action() here may not be updated. Chrome needs to provide
// a way to update DND action asynchronously.
return DndActionToDragOperation(data_offer_->get()->dnd_action());
}
void DataDevice::OnDragExited() {
if (!data_offer_)
return;
delegate_->OnLeave();
data_offer_.reset();
}
int DataDevice::OnPerformDrop(const ui::DropTargetEvent& event) {
if (!data_offer_)
return ui::DragDropTypes::DRAG_NONE;
DndAction dnd_action = data_offer_->get()->dnd_action();
delegate_->OnDrop();
// TODO(tetsui): Avoid using nested loop by adding asynchronous callback to
// aura::client::DragDropDelegate.
base::RunLoop run_loop(base::RunLoop::Type::kNestableTasksAllowed);
base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE, run_loop.QuitClosure(), kDataOfferDestructionTimeout);
quit_closure_ = run_loop.QuitClosure();
run_loop.Run();
if (quit_closure_) {
// DataOffer not destroyed by the client until the timeout.
quit_closure_.Reset();
data_offer_.reset();
drop_succeeded_ = false;
}
if (!drop_succeeded_)
return ui::DragDropTypes::DRAG_NONE;
return DndActionToDragOperation(dnd_action);
}
void DataDevice::OnClipboardDataChanged() {
if (!focused_surface_)
return;
SetSelectionToCurrentClipboardData();
}
void DataDevice::OnSurfaceFocusing(Surface* surface) {
Surface* next_focused_surface =
surface && delegate_->CanAcceptDataEventsForSurface(surface) ? surface
: nullptr;
// Check if focused surface is not changed.
if (focused_surface_ && focused_surface_->get() == next_focused_surface)
return;
std::unique_ptr<ScopedSurface> last_focused_surface =
std::move(focused_surface_);
focused_surface_ = next_focused_surface ? std::make_unique<ScopedSurface>(
next_focused_surface, this)
: nullptr;
// Check if the client newly obtained focus.
if (focused_surface_ && !last_focused_surface)
SetSelectionToCurrentClipboardData();
}
void DataDevice::OnSurfaceFocused(Surface* surface) {}
void DataDevice::OnDataOfferDestroying(DataOffer* data_offer) {
if (data_offer_ && data_offer_->get() == data_offer) {
drop_succeeded_ = data_offer_->get()->finished();
if (quit_closure_)
std::move(quit_closure_).Run();
data_offer_.reset();
}
}
void DataDevice::OnSurfaceDestroying(Surface* surface) {
if (focused_surface_ && focused_surface_->get() == surface)
focused_surface_.reset();
}
Surface* DataDevice::GetEffectiveTargetForEvent(
const ui::DropTargetEvent& event) const {
aura::Window* window = static_cast<aura::Window*>(event.target());
if (!window)
return nullptr;
Surface* target = Surface::AsSurface(window);
if (!target)
return nullptr;
return delegate_->CanAcceptDataEventsForSurface(target) ? target : nullptr;
}
void DataDevice::SetSelectionToCurrentClipboardData() {
DataOffer* data_offer = delegate_->OnDataOffer(DataOffer::COPY_PASTE);
data_offer->SetClipboardData(file_helper_,
*ui::Clipboard::GetForCurrentThread());
delegate_->OnSelection(*data_offer);
}
} // namespace exo
|
