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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <QtClipboard.hxx>
#include <QtClipboard.moc>
#include <cppuhelper/supportsservice.hxx>
#include <sal/log.hxx>
#include <QtWidgets/QApplication>
#include <QtInstance.hxx>
#include <QtTransferable.hxx>
#include <QtTools.hxx>
#include <cassert>
#include <map>
#include <utility>
QtClipboard::QtClipboard(OUString aModeString, const QClipboard::Mode aMode)
: cppu::WeakComponentImplHelper<css::datatransfer::clipboard::XSystemClipboard,
css::datatransfer::clipboard::XFlushableClipboard,
XServiceInfo>(m_aMutex)
, m_aClipboardName(std::move(aModeString))
, m_aClipboardMode(aMode)
, m_bOwnClipboardChange(false)
, m_bDoClear(false)
{
assert(isSupported(m_aClipboardMode));
// DirectConnection guarantees the changed slot runs in the same thread as the QClipboard
connect(QApplication::clipboard(), &QClipboard::changed, this, &QtClipboard::handleChanged,
Qt::DirectConnection);
// explicitly queue an event, so we can eventually ignore it
connect(this, &QtClipboard::clearClipboard, this, &QtClipboard::handleClearClipboard,
Qt::QueuedConnection);
}
css::uno::Reference<css::uno::XInterface> QtClipboard::create(const OUString& aModeString)
{
static const std::map<OUString, QClipboard::Mode> aNameToClipboardMap
= { { "CLIPBOARD", QClipboard::Clipboard }, { "PRIMARY", QClipboard::Selection } };
assert(QApplication::clipboard()->thread() == qApp->thread());
auto iter = aNameToClipboardMap.find(aModeString);
if (iter != aNameToClipboardMap.end() && isSupported(iter->second))
return cppu::getXWeak(new QtClipboard(aModeString, iter->second));
SAL_WARN("vcl.qt", "Ignoring unrecognized clipboard type: '" << aModeString << "'");
return css::uno::Reference<css::uno::XInterface>();
}
void QtClipboard::flushClipboard()
{
auto* pSalInst(GetQtInstance());
SolarMutexGuard g;
pSalInst->RunInMainThread([this]() {
if (!isOwner(m_aClipboardMode))
return;
QClipboard* pClipboard = QApplication::clipboard();
const QtMimeData* pQtMimeData
= dynamic_cast<const QtMimeData*>(pClipboard->mimeData(m_aClipboardMode));
assert(pQtMimeData);
QMimeData* pMimeCopy = nullptr;
if (pQtMimeData && pQtMimeData->deepCopy(&pMimeCopy))
{
m_bOwnClipboardChange = true;
pClipboard->setMimeData(pMimeCopy, m_aClipboardMode);
m_bOwnClipboardChange = false;
}
});
}
css::uno::Reference<css::datatransfer::XTransferable> QtClipboard::getContents()
{
#if defined(EMSCRIPTEN)
static QMimeData aMimeData;
#endif
osl::MutexGuard aGuard(m_aMutex);
// if we're the owner, we might have the XTransferable from setContents. but
// maybe a non-LO clipboard change from within LO, like some C'n'P in the
// QFileDialog, might have invalidated m_aContents, so we need to check it too.
if (isOwner(m_aClipboardMode) && m_aContents.is())
return m_aContents;
// check if we can still use the shared QtClipboardTransferable
const QMimeData* pMimeData = QApplication::clipboard()->mimeData(m_aClipboardMode);
#if defined(EMSCRIPTEN)
if (!pMimeData)
pMimeData = &aMimeData;
#endif
if (m_aContents.is())
{
const auto* pTrans = dynamic_cast<QtClipboardTransferable*>(m_aContents.get());
assert(pTrans);
if (pTrans && pTrans->mimeData() == pMimeData)
return m_aContents;
}
m_aContents = new QtClipboardTransferable(m_aClipboardMode, pMimeData);
return m_aContents;
}
void QtClipboard::handleClearClipboard()
{
if (!m_bDoClear)
return;
QApplication::clipboard()->clear(m_aClipboardMode);
}
void QtClipboard::setContents(
const css::uno::Reference<css::datatransfer::XTransferable>& xTrans,
const css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner>& xClipboardOwner)
{
// it's actually possible to get a non-empty xTrans and an empty xClipboardOwner!
osl::ClearableMutexGuard aGuard(m_aMutex);
css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner> xOldOwner(m_aOwner);
css::uno::Reference<css::datatransfer::XTransferable> xOldContents(m_aContents);
m_aContents = xTrans;
m_aOwner = xClipboardOwner;
m_bDoClear = !m_aContents.is();
if (!m_bDoClear)
{
m_bOwnClipboardChange = true;
QApplication::clipboard()->setMimeData(new QtMimeData(m_aContents), m_aClipboardMode);
m_bOwnClipboardChange = false;
}
else
{
assert(!m_aOwner.is());
Q_EMIT clearClipboard();
}
aGuard.clear();
// we have to notify only an owner change, since handleChanged can't
// access the previous owner anymore and can just handle lost ownership.
if (xOldOwner.is() && xOldOwner != xClipboardOwner)
xOldOwner->lostOwnership(this, xOldContents);
}
void QtClipboard::handleChanged(QClipboard::Mode aMode)
{
if (aMode != m_aClipboardMode)
return;
osl::ClearableMutexGuard aGuard(m_aMutex);
// QtWayland will send a second change notification (seemingly without any
// trigger). And any C'n'P operation in the Qt file picker emits a signal,
// with LO still holding the clipboard ownership, but internally having lost
// it. So ignore any signal, which still delivers the internal QtMimeData
// as the clipboard content and is no "advertised" change.
if (!m_bOwnClipboardChange && isOwner(aMode)
&& dynamic_cast<const QtMimeData*>(QApplication::clipboard()->mimeData(aMode)))
return;
css::uno::Reference<css::datatransfer::clipboard::XClipboardOwner> xOldOwner(m_aOwner);
css::uno::Reference<css::datatransfer::XTransferable> xOldContents(m_aContents);
// ownership change from LO POV is handled in setContents
if (!m_bOwnClipboardChange)
{
m_aContents.clear();
m_aOwner.clear();
}
std::vector<css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>> aListeners(
m_aListeners);
css::datatransfer::clipboard::ClipboardEvent aEv;
aEv.Contents = getContents();
aGuard.clear();
if (!m_bOwnClipboardChange && xOldOwner.is())
xOldOwner->lostOwnership(this, xOldContents);
for (auto const& listener : aListeners)
listener->changedContents(aEv);
}
OUString QtClipboard::getImplementationName() { return "com.sun.star.datatransfer.QtClipboard"; }
css::uno::Sequence<OUString> QtClipboard::getSupportedServiceNames()
{
return { "com.sun.star.datatransfer.clipboard.SystemClipboard" };
}
sal_Bool QtClipboard::supportsService(const OUString& ServiceName)
{
return cppu::supportsService(this, ServiceName);
}
OUString QtClipboard::getName() { return m_aClipboardName; }
sal_Int8 QtClipboard::getRenderingCapabilities() { return 0; }
void QtClipboard::addClipboardListener(
const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
{
osl::MutexGuard aGuard(m_aMutex);
m_aListeners.push_back(listener);
}
void QtClipboard::removeClipboardListener(
const css::uno::Reference<css::datatransfer::clipboard::XClipboardListener>& listener)
{
osl::MutexGuard aGuard(m_aMutex);
std::erase(m_aListeners, listener);
}
bool QtClipboard::isSupported(const QClipboard::Mode aMode)
{
const QClipboard* pClipboard = QApplication::clipboard();
switch (aMode)
{
case QClipboard::Selection:
return pClipboard->supportsSelection();
case QClipboard::FindBuffer:
return pClipboard->supportsFindBuffer();
case QClipboard::Clipboard:
return true;
}
return false;
}
bool QtClipboard::isOwner(const QClipboard::Mode aMode)
{
if (!isSupported(aMode))
return false;
const QClipboard* pClipboard = QApplication::clipboard();
switch (aMode)
{
case QClipboard::Selection:
return pClipboard->ownsSelection();
case QClipboard::FindBuffer:
return pClipboard->ownsFindBuffer();
case QClipboard::Clipboard:
return pClipboard->ownsClipboard();
}
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
