Even if the code fails, the runtime will have a xdg-open binary that supports the required API (portals in flatpak and userd launcher in snap) Task-number: QTBUG-83939 Change-Id: I8527cfe20411c535686b7171ff9ef285ab9e10aa Reviewed-by: Jan Grulich <jgrulich@redhat.com> Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
371 lines
13 KiB
C++
371 lines
13 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the plugins of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qgenericunixservices_p.h"
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#include <QtGui/private/qtguiglobal_p.h>
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#include <QtCore/QDebug>
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#include <QtCore/QFile>
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#if QT_CONFIG(process)
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# include <QtCore/QProcess>
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#endif
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#if QT_CONFIG(settings)
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#include <QtCore/QSettings>
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#endif
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#include <QtCore/QStandardPaths>
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#include <QtCore/QUrl>
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#if QT_CONFIG(dbus)
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// These QtCore includes are needed for xdg-desktop-portal support
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#include <QtCore/private/qcore_unix_p.h>
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#include <QtCore/QFileInfo>
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#include <QtCore/QUrlQuery>
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#include <QtDBus/QDBusConnection>
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#include <QtDBus/QDBusMessage>
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#include <QtDBus/QDBusPendingCall>
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#include <QtDBus/QDBusPendingCallWatcher>
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#include <QtDBus/QDBusPendingReply>
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#include <QtDBus/QDBusUnixFileDescriptor>
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#include <fcntl.h>
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#endif // QT_CONFIG(dbus)
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#include <stdlib.h>
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QT_BEGIN_NAMESPACE
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#if QT_CONFIG(multiprocess)
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enum { debug = 0 };
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static inline QByteArray detectDesktopEnvironment()
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{
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const QByteArray xdgCurrentDesktop = qgetenv("XDG_CURRENT_DESKTOP");
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if (!xdgCurrentDesktop.isEmpty())
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return xdgCurrentDesktop.toUpper(); // KDE, GNOME, UNITY, LXDE, MATE, XFCE...
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// Classic fallbacks
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if (!qEnvironmentVariableIsEmpty("KDE_FULL_SESSION"))
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return QByteArrayLiteral("KDE");
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if (!qEnvironmentVariableIsEmpty("GNOME_DESKTOP_SESSION_ID"))
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return QByteArrayLiteral("GNOME");
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// Fallback to checking $DESKTOP_SESSION (unreliable)
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QByteArray desktopSession = qgetenv("DESKTOP_SESSION");
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// This can be a path in /usr/share/xsessions
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int slash = desktopSession.lastIndexOf('/');
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if (slash != -1) {
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#if QT_CONFIG(settings)
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QSettings desktopFile(QFile::decodeName(desktopSession + ".desktop"), QSettings::IniFormat);
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desktopFile.beginGroup(QStringLiteral("Desktop Entry"));
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QByteArray desktopName = desktopFile.value(QStringLiteral("DesktopNames")).toByteArray();
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if (!desktopName.isEmpty())
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return desktopName;
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#endif
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// try decoding just the basename
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desktopSession = desktopSession.mid(slash + 1);
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}
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if (desktopSession == "gnome")
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return QByteArrayLiteral("GNOME");
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else if (desktopSession == "xfce")
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return QByteArrayLiteral("XFCE");
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else if (desktopSession == "kde")
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return QByteArrayLiteral("KDE");
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return QByteArrayLiteral("UNKNOWN");
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}
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static inline bool checkExecutable(const QString &candidate, QString *result)
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{
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*result = QStandardPaths::findExecutable(candidate);
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return !result->isEmpty();
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}
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static inline bool detectWebBrowser(const QByteArray &desktop,
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bool checkBrowserVariable,
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QString *browser)
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{
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const char *browsers[] = {"google-chrome", "firefox", "mozilla", "opera"};
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browser->clear();
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if (checkExecutable(QStringLiteral("xdg-open"), browser))
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return true;
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if (checkBrowserVariable) {
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QByteArray browserVariable = qgetenv("DEFAULT_BROWSER");
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if (browserVariable.isEmpty())
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browserVariable = qgetenv("BROWSER");
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if (!browserVariable.isEmpty() && checkExecutable(QString::fromLocal8Bit(browserVariable), browser))
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return true;
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}
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if (desktop == QByteArray("KDE")) {
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if (checkExecutable(QStringLiteral("kde-open5"), browser))
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return true;
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// Konqueror launcher
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if (checkExecutable(QStringLiteral("kfmclient"), browser)) {
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browser->append(QLatin1String(" exec"));
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return true;
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}
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} else if (desktop == QByteArray("GNOME")) {
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if (checkExecutable(QStringLiteral("gnome-open"), browser))
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return true;
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}
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for (size_t i = 0; i < sizeof(browsers)/sizeof(char *); ++i)
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if (checkExecutable(QLatin1String(browsers[i]), browser))
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return true;
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return false;
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}
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static inline bool launch(const QString &launcher, const QUrl &url)
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{
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const QString command = launcher + QLatin1Char(' ') + QLatin1String(url.toEncoded());
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if (debug)
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qDebug("Launching %s", qPrintable(command));
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#if !QT_CONFIG(process)
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const bool ok = ::system(qPrintable(command + QLatin1String(" &")));
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#else
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QStringList args = QProcess::splitCommand(command);
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bool ok = false;
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if (!args.isEmpty()) {
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QString program = args.takeFirst();
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ok = QProcess::startDetached(program, args);
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}
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#endif
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if (!ok)
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qWarning("Launch failed (%s)", qPrintable(command));
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return ok;
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}
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#if QT_CONFIG(dbus)
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static inline bool checkNeedPortalSupport()
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{
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return !QStandardPaths::locate(QStandardPaths::RuntimeLocation, QLatin1String("flatpak-info")).isEmpty() || qEnvironmentVariableIsSet("SNAP");
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}
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static inline QDBusMessage xdgDesktopPortalOpenFile(const QUrl &url)
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{
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// DBus signature:
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// OpenFile (IN s parent_window,
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// IN h fd,
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// IN a{sv} options,
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// OUT o handle)
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// Options:
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// handle_token (s) - A string that will be used as the last element of the @handle.
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// writable (b) - Whether to allow the chosen application to write to the file.
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#ifdef O_PATH
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const int fd = qt_safe_open(QFile::encodeName(url.toLocalFile()), O_PATH);
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if (fd != -1) {
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QDBusMessage message = QDBusMessage::createMethodCall(QLatin1String("org.freedesktop.portal.Desktop"),
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QLatin1String("/org/freedesktop/portal/desktop"),
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QLatin1String("org.freedesktop.portal.OpenURI"),
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QLatin1String("OpenFile"));
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QDBusUnixFileDescriptor descriptor;
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descriptor.giveFileDescriptor(fd);
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const QVariantMap options = {{QLatin1String("writable"), true}};
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// FIXME parent_window_id
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message << QString() << QVariant::fromValue(descriptor) << options;
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return QDBusConnection::sessionBus().call(message);
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}
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#else
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Q_UNUSED(url);
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#endif
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return QDBusMessage::createError(QDBusError::InternalError, qt_error_string());
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}
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static inline QDBusMessage xdgDesktopPortalOpenUrl(const QUrl &url)
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{
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// DBus signature:
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// OpenURI (IN s parent_window,
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// IN s uri,
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// IN a{sv} options,
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// OUT o handle)
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// Options:
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// handle_token (s) - A string that will be used as the last element of the @handle.
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// writable (b) - Whether to allow the chosen application to write to the file.
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// This key only takes effect the uri points to a local file that is exported in the document portal,
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// and the chosen application is sandboxed itself.
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QDBusMessage message = QDBusMessage::createMethodCall(QLatin1String("org.freedesktop.portal.Desktop"),
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QLatin1String("/org/freedesktop/portal/desktop"),
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QLatin1String("org.freedesktop.portal.OpenURI"),
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QLatin1String("OpenURI"));
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// FIXME parent_window_id and handle writable option
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message << QString() << url.toString() << QVariantMap();
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return QDBusConnection::sessionBus().call(message);
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}
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static inline QDBusMessage xdgDesktopPortalSendEmail(const QUrl &url)
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{
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// DBus signature:
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// ComposeEmail (IN s parent_window,
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// IN a{sv} options,
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// OUT o handle)
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// Options:
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// address (s) - The email address to send to.
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// subject (s) - The subject for the email.
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// body (s) - The body for the email.
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// attachment_fds (ah) - File descriptors for files to attach.
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QUrlQuery urlQuery(url);
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QVariantMap options;
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options.insert(QLatin1String("address"), url.path());
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options.insert(QLatin1String("subject"), urlQuery.queryItemValue(QLatin1String("subject")));
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options.insert(QLatin1String("body"), urlQuery.queryItemValue(QLatin1String("body")));
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// O_PATH seems to be present since Linux 2.6.39, which is not case of RHEL 6
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#ifdef O_PATH
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QList<QDBusUnixFileDescriptor> attachments;
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const QStringList attachmentUris = urlQuery.allQueryItemValues(QLatin1String("attachment"));
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for (const QString &attachmentUri : attachmentUris) {
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const int fd = qt_safe_open(QFile::encodeName(attachmentUri), O_PATH);
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if (fd != -1) {
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QDBusUnixFileDescriptor descriptor(fd);
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attachments << descriptor;
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qt_safe_close(fd);
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}
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}
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options.insert(QLatin1String("attachment_fds"), QVariant::fromValue(attachments));
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#endif
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QDBusMessage message = QDBusMessage::createMethodCall(QLatin1String("org.freedesktop.portal.Desktop"),
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QLatin1String("/org/freedesktop/portal/desktop"),
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QLatin1String("org.freedesktop.portal.Email"),
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QLatin1String("ComposeEmail"));
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// FIXME parent_window_id
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message << QString() << options;
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return QDBusConnection::sessionBus().call(message);
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}
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#endif // QT_CONFIG(dbus)
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QByteArray QGenericUnixServices::desktopEnvironment() const
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{
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static const QByteArray result = detectDesktopEnvironment();
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return result;
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}
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bool QGenericUnixServices::openUrl(const QUrl &url)
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{
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if (url.scheme() == QLatin1String("mailto")) {
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#if QT_CONFIG(dbus)
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if (checkNeedPortalSupport()) {
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QDBusError error = xdgDesktopPortalSendEmail(url);
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if (!error.isValid())
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return true;
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// service not running, fall back
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}
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#endif
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return openDocument(url);
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}
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#if QT_CONFIG(dbus)
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if (checkNeedPortalSupport()) {
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QDBusError error = xdgDesktopPortalOpenUrl(url);
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if (!error.isValid())
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return true;
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}
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#endif
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if (m_webBrowser.isEmpty() && !detectWebBrowser(desktopEnvironment(), true, &m_webBrowser)) {
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qWarning("Unable to detect a web browser to launch '%s'", qPrintable(url.toString()));
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return false;
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}
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return launch(m_webBrowser, url);
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}
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bool QGenericUnixServices::openDocument(const QUrl &url)
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{
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#if QT_CONFIG(dbus)
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if (checkNeedPortalSupport()) {
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QDBusError error = xdgDesktopPortalOpenFile(url);
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if (!error.isValid())
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return true;
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}
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#endif
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if (m_documentLauncher.isEmpty() && !detectWebBrowser(desktopEnvironment(), false, &m_documentLauncher)) {
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qWarning("Unable to detect a launcher for '%s'", qPrintable(url.toString()));
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return false;
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}
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return launch(m_documentLauncher, url);
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}
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#else
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QByteArray QGenericUnixServices::desktopEnvironment() const
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{
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return QByteArrayLiteral("UNKNOWN");
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}
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bool QGenericUnixServices::openUrl(const QUrl &url)
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{
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Q_UNUSED(url);
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qWarning("openUrl() not supported on this platform");
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return false;
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}
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bool QGenericUnixServices::openDocument(const QUrl &url)
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{
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Q_UNUSED(url);
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qWarning("openDocument() not supported on this platform");
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return false;
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}
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#endif // QT_NO_MULTIPROCESS
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QT_END_NAMESPACE
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