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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwaylanddataoffer_p.h"
#include "qwaylanddatadevicemanager_p.h"
#include "qwaylanddisplay_p.h"
#include <QtCore/private/qcore_unix_p.h>
#include <QtGui/private/qguiapplication_p.h>
#include <qpa/qplatformclipboard.h>
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
namespace QtWaylandClient {
static QString utf8Text()
{
return QStringLiteral("text/plain;charset=utf-8");
}
QWaylandDataOffer::QWaylandDataOffer(QWaylandDisplay *display, struct ::wl_data_offer *offer)
: QtWayland::wl_data_offer(offer)
, m_display(display)
, m_mimeData(new QWaylandMimeData(this))
{
}
QWaylandDataOffer::~QWaylandDataOffer()
{
destroy();
}
QString QWaylandDataOffer::firstFormat() const
{
if (m_mimeData->formats().isEmpty())
return QString();
return m_mimeData->formats().first();
}
QMimeData *QWaylandDataOffer::mimeData()
{
return m_mimeData.data();
}
Qt::DropActions QWaylandDataOffer::supportedActions() const
{
if (version() < 3) {
return Qt::MoveAction | Qt::CopyAction;
}
return m_supportedActions;
}
void QWaylandDataOffer::startReceiving(const QString &mimeType, int fd)
{
receive(mimeType, fd);
wl_display_flush(m_display->wl_display());
}
void QWaylandDataOffer::data_offer_offer(const QString &mime_type)
{
m_mimeData->appendFormat(mime_type);
}
void QWaylandDataOffer::data_offer_action(uint32_t dnd_action)
{
Q_UNUSED(dnd_action);
// This is the compositor telling the drag target what action it should perform
// It does not map nicely into Qt final drop semantics, other than pretending there is only one supported action?
}
void QWaylandDataOffer::data_offer_source_actions(uint32_t source_actions)
{
m_supportedActions = Qt::DropActions();
if (source_actions & WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE)
m_supportedActions |= Qt::MoveAction;
if (source_actions & WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY)
m_supportedActions |= Qt::CopyAction;
}
QWaylandMimeData::QWaylandMimeData(QWaylandAbstractDataOffer *dataOffer)
: m_dataOffer(dataOffer)
{
}
QWaylandMimeData::~QWaylandMimeData()
{
}
void QWaylandMimeData::appendFormat(const QString &mimeType)
{
m_types << mimeType;
m_data.remove(mimeType); // Clear previous contents
}
bool QWaylandMimeData::hasFormat_sys(const QString &mimeType) const
{
if (m_types.contains(mimeType))
return true;
if (mimeType == QStringLiteral("text/plain") && m_types.contains(utf8Text()))
return true;
return false;
}
QStringList QWaylandMimeData::formats_sys() const
{
return m_types;
}
QVariant QWaylandMimeData::retrieveData_sys(const QString &mimeType, QMetaType type) const
{
Q_UNUSED(type);
if (m_data.contains(mimeType))
return m_data.value(mimeType);
QString mime = mimeType;
if (!m_types.contains(mimeType)) {
if (mimeType == QStringLiteral("text/plain") && m_types.contains(utf8Text()))
mime = utf8Text();
else
return QVariant();
}
int pipefd[2];
if (qt_safe_pipe(pipefd) == -1) {
qWarning("QWaylandMimeData: pipe2() failed");
return QVariant();
}
m_dataOffer->startReceiving(mime, pipefd[1]);
close(pipefd[1]);
QByteArray content;
if (readData(pipefd[0], content) != 0) {
qWarning("QWaylandDataOffer: error reading data for mimeType %s", qPrintable(mimeType));
content = QByteArray();
}
close(pipefd[0]);
m_data.insert(mimeType, content);
return content;
}
int QWaylandMimeData::readData(int fd, QByteArray &data) const
{
struct pollfd readset;
readset.fd = fd;
readset.events = POLLIN;
struct timespec timeout;
timeout.tv_sec = 1;
timeout.tv_nsec = 0;
Q_FOREVER {
int ready = qt_safe_poll(&readset, 1, &timeout);
if (ready < 0) {
qWarning() << "QWaylandDataOffer: qt_safe_poll() failed";
return -1;
} else if (ready == 0) {
qWarning("QWaylandDataOffer: timeout reading from pipe");
return -1;
} else {
char buf[4096];
int n = QT_READ(fd, buf, sizeof buf);
if (n < 0) {
qWarning("QWaylandDataOffer: read() failed");
return -1;
} else if (n == 0) {
return 0;
} else if (n > 0) {
data.append(buf, n);
}
}
}
}
}
QT_END_NAMESPACE
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