2016-06-20 12:21:16 +03:00
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/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2016 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "waylandclipboard.h"
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#include <KWayland/Client/connection_thread.h>
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#include <KWayland/Client/datadevicemanager.h>
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#include <KWayland/Client/datadevice.h>
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#include <KWayland/Client/datasource.h>
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#include <KWayland/Client/event_queue.h>
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#include <KWayland/Client/seat.h>
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#include <KWayland/Client/registry.h>
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#include <QClipboard>
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#include <QFile>
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#include <QGuiApplication>
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#include <QThread>
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#include <QMimeData>
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#include <QMimeType>
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#include <qplatformdefs.h>
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#include <unistd.h>
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using namespace KWayland::Client;
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WaylandClipboard::WaylandClipboard(QObject *parent)
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: QObject(parent)
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, m_thread(new QThread)
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, m_connectionThread(new ConnectionThread)
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{
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2016-06-29 20:13:00 +03:00
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m_connectionThread->setSocketFd(qgetenv("WAYLAND_SOCKET").toInt());
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2016-06-20 12:21:16 +03:00
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m_connectionThread->moveToThread(m_thread);
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m_thread->start();
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connect(m_connectionThread, &ConnectionThread::connected, this, &WaylandClipboard::setup, Qt::QueuedConnection);
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m_connectionThread->initConnection();
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connect(qApp->clipboard(), &QClipboard::changed, this,
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[this] (QClipboard::Mode mode) {
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if (mode != QClipboard::Clipboard) {
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return;
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}
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// TODO: do we need to take a copy of the clipboard in order to keep it after the X application quit?
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if (!m_dataDeviceManager || !m_dataDevice) {
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return;
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}
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auto source = m_dataDeviceManager->createDataSource(this);
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auto mimeData = qApp->clipboard()->mimeData();
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const auto formats = mimeData->formats();
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for (const auto &format : formats) {
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source->offer(format);
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}
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connect(source, &DataSource::sendDataRequested, this,
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[] (const QString &type, qint32 fd) {
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auto mimeData = qApp->clipboard()->mimeData();
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if (!mimeData->hasFormat(type)) {
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close(fd);
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return;
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}
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const auto data = mimeData->data(type);
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QFile writePipe;
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if (writePipe.open(fd, QIODevice::WriteOnly, QFile::AutoCloseHandle)) {
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writePipe.write(data);
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writePipe.close();
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} else {
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close(fd);
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}
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}
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);
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m_dataDevice->setSelection(0, source);
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delete m_dataSource;
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m_dataSource = source;
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m_connectionThread->flush();
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}
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);
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}
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WaylandClipboard::~WaylandClipboard()
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{
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m_connectionThread->deleteLater();
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m_thread->quit();
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m_thread->wait();
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}
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static int readData(int fd, QByteArray &data)
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{
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// implementation based on QtWayland file qwaylanddataoffer.cpp
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char buf[4096];
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int retryCount = 0;
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int n;
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while (true) {
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n = QT_READ(fd, buf, sizeof buf);
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if (n == -1 && (errno == EAGAIN || errno == EWOULDBLOCK) && ++retryCount < 1000) {
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usleep(1000);
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} else {
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break;
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}
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}
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if (n > 0) {
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data.append(buf, n);
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n = readData(fd, data);
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}
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return n;
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}
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void WaylandClipboard::setup()
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{
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EventQueue *queue = new EventQueue(this);
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queue->setup(m_connectionThread);
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Registry *registry = new Registry(this);
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registry->setEventQueue(queue);
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registry->create(m_connectionThread);
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connect(registry, &Registry::interfacesAnnounced, this,
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[this, registry] {
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const auto seatInterface = registry->interface(Registry::Interface::Seat);
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if (seatInterface.name != 0) {
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m_seat = registry->createSeat(seatInterface.name, seatInterface.version, this);
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}
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const auto ddmInterface = registry->interface(Registry::Interface::DataDeviceManager);
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if (ddmInterface.name != 0) {
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m_dataDeviceManager = registry->createDataDeviceManager(ddmInterface.name, ddmInterface.version, this);
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}
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if (m_seat && m_dataDeviceManager) {
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m_dataDevice = m_dataDeviceManager->getDataDevice(m_seat, this);
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connect(m_dataDevice, &DataDevice::selectionOffered, this,
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[this] (DataOffer *offer) {
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if (offer->offeredMimeTypes().isEmpty()) {
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return;
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}
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int pipeFds[2];
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if (pipe(pipeFds) != 0) {
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return;
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}
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const auto mimeType = offer->offeredMimeTypes().first();
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offer->receive(mimeType, pipeFds[1]);
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m_connectionThread->flush();
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close(pipeFds[1]);
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QByteArray content;
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if (readData(pipeFds[0], content) != 0) {
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content = QByteArray();
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}
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close(pipeFds[0]);
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QMimeData *mimeData = new QMimeData();
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mimeData->setData(mimeType.name(), content);
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qApp->clipboard()->setMimeData(mimeData);
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}
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);
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connect(m_dataDevice, &DataDevice::selectionCleared, this,
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[this] {
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qApp->clipboard()->clear();
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}
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);
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}
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}
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);
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registry->setup();
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}
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