1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "qwaylanddatasource_p.h"
5#include "qwaylanddataoffer_p.h"
6#include "qwaylanddatadevicemanager_p.h"
7#include "qwaylandinputdevice_p.h"
8#include "qwaylandmimehelper_p.h"
9
10#include <QtCore/QFile>
11
12#include <QtCore/QDebug>
13
14#include <unistd.h>
15#include <signal.h>
16#include <fcntl.h>
17
18QT_BEGIN_NAMESPACE
19
20namespace QtWaylandClient {
21
22QWaylandDataSource::QWaylandDataSource(QWaylandDataDeviceManager *dataDeviceManager, QMimeData *mimeData)
23 : QtWayland::wl_data_source(dataDeviceManager->create_data_source())
24 , m_mime_data(mimeData)
25{
26 if (!mimeData)
27 return;
28 const auto formats = QInternalMimeData::formatsHelper(data: mimeData);
29 for (const QString &format : formats) {
30 offer(format);
31 }
32}
33
34QWaylandDataSource::~QWaylandDataSource()
35{
36 destroy();
37}
38
39void QWaylandDataSource::data_source_cancelled()
40{
41 Q_EMIT cancelled();
42}
43
44void QWaylandDataSource::data_source_send(const QString &mime_type, int32_t fd)
45{
46 QByteArray content = QWaylandMimeHelper::getByteArray(mimeData: m_mime_data, mimeType: mime_type);
47 if (!content.isEmpty()) {
48 // Create a sigpipe handler that does nothing, or clients may be forced to terminate
49 // if the pipe is closed in the other end.
50 struct sigaction action, oldAction;
51 action.sa_handler = SIG_IGN;
52 sigemptyset (set: &action.sa_mask);
53 action.sa_flags = 0;
54
55 sigaction(SIGPIPE, act: &action, oact: &oldAction);
56 // Some compositors (e.g., mutter) make fd with O_NONBLOCK.
57 // Since wl_data_source.send describes that fd is closed here,
58 // it should be done in a loop and don't have any advantage.
59 // Blocking operation will be used.
60 // According to fcntl(2), FSETFL ignores O_WRONLY. So this
61 // call will just remove O_NONBLOCK.
62 fcntl(fd: fd, F_SETFL, O_WRONLY);
63 ssize_t unused = write(fd: fd, buf: content.constData(), n: content.size());
64 Q_UNUSED(unused);
65 sigaction(SIGPIPE, act: &oldAction, oact: nullptr);
66 }
67 close(fd: fd);
68}
69
70void QWaylandDataSource::data_source_target(const QString &mime_type)
71{
72 m_accepted = !mime_type.isEmpty();
73 Q_EMIT dndResponseUpdated(accepted: m_accepted, action: m_dropAction);
74}
75
76void QWaylandDataSource::data_source_action(uint32_t action)
77{
78 Qt::DropAction qtAction = Qt::IgnoreAction;
79
80 if (action == WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE)
81 qtAction = Qt::MoveAction;
82 else if (action == WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY)
83 qtAction = Qt::CopyAction;
84
85 m_dropAction = qtAction;
86 Q_EMIT dndResponseUpdated(accepted: m_accepted, action: m_dropAction);
87}
88
89void QWaylandDataSource::data_source_dnd_finished()
90{
91 Q_EMIT finished();
92}
93
94void QWaylandDataSource::data_source_dnd_drop_performed()
95{
96
97 Q_EMIT dndDropped(accepted: m_accepted, action: m_dropAction);
98}
99
100}
101
102QT_END_NAMESPACE
103
104#include "moc_qwaylanddatasource_p.cpp"
105

source code of qtwayland/src/client/qwaylanddatasource.cpp