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Diffstat (limited to 'src/gui/platform/unix/qgenericunixservices.cpp')
| -rw-r--r-- | src/gui/platform/unix/qgenericunixservices.cpp | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/src/gui/platform/unix/qgenericunixservices.cpp b/src/gui/platform/unix/qgenericunixservices.cpp new file mode 100644 index 0000000000..10d5468b9a --- /dev/null +++ b/src/gui/platform/unix/qgenericunixservices.cpp @@ -0,0 +1,374 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qgenericunixservices_p.h" +#include <QtGui/private/qtguiglobal_p.h> + +#include <QtCore/QDebug> +#include <QtCore/QFile> +#if QT_CONFIG(process) +# include <QtCore/QProcess> +#endif +#if QT_CONFIG(settings) +#include <QtCore/QSettings> +#endif +#include <QtCore/QStandardPaths> +#include <QtCore/QUrl> + +#if QT_CONFIG(dbus) +// These QtCore includes are needed for xdg-desktop-portal support +#include <QtCore/private/qcore_unix_p.h> + +#include <QtCore/QFileInfo> +#include <QtCore/QUrlQuery> + +#include <QtDBus/QDBusConnection> +#include <QtDBus/QDBusMessage> +#include <QtDBus/QDBusPendingCall> +#include <QtDBus/QDBusPendingCallWatcher> +#include <QtDBus/QDBusPendingReply> +#include <QtDBus/QDBusUnixFileDescriptor> + +#include <fcntl.h> + +#endif // QT_CONFIG(dbus) + +#include <stdlib.h> + +QT_BEGIN_NAMESPACE + +#if QT_CONFIG(multiprocess) + +enum { debug = 0 }; + +static inline QByteArray detectDesktopEnvironment() +{ + const QByteArray xdgCurrentDesktop = qgetenv("XDG_CURRENT_DESKTOP"); + if (!xdgCurrentDesktop.isEmpty()) + return xdgCurrentDesktop.toUpper(); // KDE, GNOME, UNITY, LXDE, MATE, XFCE... + + // Classic fallbacks + if (!qEnvironmentVariableIsEmpty("KDE_FULL_SESSION")) + return QByteArrayLiteral("KDE"); + if (!qEnvironmentVariableIsEmpty("GNOME_DESKTOP_SESSION_ID")) + return QByteArrayLiteral("GNOME"); + + // Fallback to checking $DESKTOP_SESSION (unreliable) + QByteArray desktopSession = qgetenv("DESKTOP_SESSION"); + + // This can be a path in /usr/share/xsessions + int slash = desktopSession.lastIndexOf('/'); + if (slash != -1) { +#if QT_CONFIG(settings) + QSettings desktopFile(QFile::decodeName(desktopSession + ".desktop"), QSettings::IniFormat); + desktopFile.beginGroup(QStringLiteral("Desktop Entry")); + QByteArray desktopName = desktopFile.value(QStringLiteral("DesktopNames")).toByteArray(); + if (!desktopName.isEmpty()) + return desktopName; +#endif + + // try decoding just the basename + desktopSession = desktopSession.mid(slash + 1); + } + + if (desktopSession == "gnome") + return QByteArrayLiteral("GNOME"); + else if (desktopSession == "xfce") + return QByteArrayLiteral("XFCE"); + else if (desktopSession == "kde") + return QByteArrayLiteral("KDE"); + + return QByteArrayLiteral("UNKNOWN"); +} + +static inline bool checkExecutable(const QString &candidate, QString *result) +{ + *result = QStandardPaths::findExecutable(candidate); + return !result->isEmpty(); +} + +static inline bool detectWebBrowser(const QByteArray &desktop, + bool checkBrowserVariable, + QString *browser) +{ + const char *browsers[] = {"google-chrome", "firefox", "mozilla", "opera"}; + + browser->clear(); + if (checkExecutable(QStringLiteral("xdg-open"), browser)) + return true; + + if (checkBrowserVariable) { + QByteArray browserVariable = qgetenv("DEFAULT_BROWSER"); + if (browserVariable.isEmpty()) + browserVariable = qgetenv("BROWSER"); + if (!browserVariable.isEmpty() && checkExecutable(QString::fromLocal8Bit(browserVariable), browser)) + return true; + } + + if (desktop == QByteArray("KDE")) { + // Konqueror launcher + if (checkExecutable(QStringLiteral("kfmclient"), browser)) { + browser->append(QLatin1String(" exec")); + return true; + } + } else if (desktop == QByteArray("GNOME")) { + if (checkExecutable(QStringLiteral("gnome-open"), browser)) + return true; + } + + for (size_t i = 0; i < sizeof(browsers)/sizeof(char *); ++i) + if (checkExecutable(QLatin1String(browsers[i]), browser)) + return true; + return false; +} + +static inline bool launch(const QString &launcher, const QUrl &url) +{ + const QString command = launcher + QLatin1Char(' ') + QLatin1String(url.toEncoded()); + if (debug) + qDebug("Launching %s", qPrintable(command)); +#if !QT_CONFIG(process) + const bool ok = ::system(qPrintable(command + QLatin1String(" &"))); +#else + QStringList args = QProcess::splitCommand(command); + bool ok = false; + if (!args.isEmpty()) { + QString program = args.takeFirst(); + ok = QProcess::startDetached(program, args); + } +#endif + if (!ok) + qWarning("Launch failed (%s)", qPrintable(command)); + return ok; +} + +#if QT_CONFIG(dbus) +static inline bool checkNeedPortalSupport() +{ + return !QStandardPaths::locate(QStandardPaths::RuntimeLocation, QLatin1String("flatpak-info")).isEmpty() || qEnvironmentVariableIsSet("SNAP"); +} + +static inline bool isPortalReturnPermanent(const QDBusError &error) +{ + // A service unknown error isn't permanent, it just indicates that we + // should fall back to the regular way. This check includes + // QDBusError::NoError. + return error.type() != QDBusError::ServiceUnknown && error.type() != QDBusError::AccessDenied; +} + +static inline QDBusMessage xdgDesktopPortalOpenFile(const QUrl &url) +{ + // DBus signature: + // OpenFile (IN s parent_window, + // IN h fd, + // IN a{sv} options, + // OUT o handle) + // Options: + // handle_token (s) - A string that will be used as the last element of the @handle. + // writable (b) - Whether to allow the chosen application to write to the file. + +#ifdef O_PATH + const int fd = qt_safe_open(QFile::encodeName(url.toLocalFile()), O_PATH); + if (fd != -1) { + QDBusMessage message = QDBusMessage::createMethodCall(QLatin1String("org.freedesktop.portal.Desktop"), + QLatin1String("/org/freedesktop/portal/desktop"), + QLatin1String("org.freedesktop.portal.OpenURI"), + QLatin1String("OpenFile")); + + QDBusUnixFileDescriptor descriptor; + descriptor.giveFileDescriptor(fd); + + // FIXME parent_window_id and handle writable option + message << QString() << QVariant::fromValue(descriptor) << QVariantMap(); + + return QDBusConnection::sessionBus().call(message); + } +#else + Q_UNUSED(url) +#endif + + return QDBusMessage::createError(QDBusError::InternalError, qt_error_string()); +} + +static inline QDBusMessage xdgDesktopPortalOpenUrl(const QUrl &url) +{ + // DBus signature: + // OpenURI (IN s parent_window, + // IN s uri, + // IN a{sv} options, + // OUT o handle) + // Options: + // handle_token (s) - A string that will be used as the last element of the @handle. + // writable (b) - Whether to allow the chosen application to write to the file. + // This key only takes effect the uri points to a local file that is exported in the document portal, + // and the chosen application is sandboxed itself. + + QDBusMessage message = QDBusMessage::createMethodCall(QLatin1String("org.freedesktop.portal.Desktop"), + QLatin1String("/org/freedesktop/portal/desktop"), + QLatin1String("org.freedesktop.portal.OpenURI"), + QLatin1String("OpenURI")); + // FIXME parent_window_id and handle writable option + message << QString() << url.toString() << QVariantMap(); + + return QDBusConnection::sessionBus().call(message); +} + +static inline QDBusMessage xdgDesktopPortalSendEmail(const QUrl &url) +{ + // DBus signature: + // ComposeEmail (IN s parent_window, + // IN a{sv} options, + // OUT o handle) + // Options: + // address (s) - The email address to send to. + // subject (s) - The subject for the email. + // body (s) - The body for the email. + // attachment_fds (ah) - File descriptors for files to attach. + + QUrlQuery urlQuery(url); + QVariantMap options; + options.insert(QLatin1String("address"), url.path()); + options.insert(QLatin1String("subject"), urlQuery.queryItemValue(QLatin1String("subject"))); + options.insert(QLatin1String("body"), urlQuery.queryItemValue(QLatin1String("body"))); + + // O_PATH seems to be present since Linux 2.6.39, which is not case of RHEL 6 +#ifdef O_PATH + QList<QDBusUnixFileDescriptor> attachments; + const QStringList attachmentUris = urlQuery.allQueryItemValues(QLatin1String("attachment")); + + for (const QString &attachmentUri : attachmentUris) { + const int fd = qt_safe_open(QFile::encodeName(attachmentUri), O_PATH); + if (fd != -1) { + QDBusUnixFileDescriptor descriptor(fd); + attachments << descriptor; + qt_safe_close(fd); + } + } + + options.insert(QLatin1String("attachment_fds"), QVariant::fromValue(attachments)); +#endif + + QDBusMessage message = QDBusMessage::createMethodCall(QLatin1String("org.freedesktop.portal.Desktop"), + QLatin1String("/org/freedesktop/portal/desktop"), + QLatin1String("org.freedesktop.portal.Email"), + QLatin1String("ComposeEmail")); + + // FIXME parent_window_id + message << QString() << options; + + return QDBusConnection::sessionBus().call(message); +} +#endif // QT_CONFIG(dbus) + +QByteArray QGenericUnixServices::desktopEnvironment() const +{ + static const QByteArray result = detectDesktopEnvironment(); + return result; +} + +bool QGenericUnixServices::openUrl(const QUrl &url) +{ + if (url.scheme() == QLatin1String("mailto")) { +#if QT_CONFIG(dbus) + if (checkNeedPortalSupport()) { + QDBusError error = xdgDesktopPortalSendEmail(url); + if (isPortalReturnPermanent(error)) + return !error.isValid(); + + // service not running, fall back + } +#endif + return openDocument(url); + } + +#if QT_CONFIG(dbus) + if (checkNeedPortalSupport()) { + QDBusError error = xdgDesktopPortalOpenUrl(url); + if (isPortalReturnPermanent(error)) + return !error.isValid(); + } +#endif + + if (m_webBrowser.isEmpty() && !detectWebBrowser(desktopEnvironment(), true, &m_webBrowser)) { + qWarning("Unable to detect a web browser to launch '%s'", qPrintable(url.toString())); + return false; + } + return launch(m_webBrowser, url); +} + +bool QGenericUnixServices::openDocument(const QUrl &url) +{ +#if QT_CONFIG(dbus) + if (checkNeedPortalSupport()) { + QDBusError error = xdgDesktopPortalOpenFile(url); + if (isPortalReturnPermanent(error)) + return !error.isValid(); + } +#endif + + if (m_documentLauncher.isEmpty() && !detectWebBrowser(desktopEnvironment(), false, &m_documentLauncher)) { + qWarning("Unable to detect a launcher for '%s'", qPrintable(url.toString())); + return false; + } + return launch(m_documentLauncher, url); +} + +#else +QByteArray QGenericUnixServices::desktopEnvironment() const +{ + return QByteArrayLiteral("UNKNOWN"); +} + +bool QGenericUnixServices::openUrl(const QUrl &url) +{ + Q_UNUSED(url) + qWarning("openUrl() not supported on this platform"); + return false; +} + +bool QGenericUnixServices::openDocument(const QUrl &url) +{ + Q_UNUSED(url) + qWarning("openDocument() not supported on this platform"); + return false; +} + +#endif // QT_NO_MULTIPROCESS + +QT_END_NAMESPACE |