Make flatpak portal support to be used also by Snap applications

Snap now uses xdg-desktop-portal for portal support. Add check for apps
running in Snap and make them use portals by default. We also should be
using different name for the platform theme used by sandboxed apps.

Change-Id: Ibaa35b7549b3d94775d7edb937f729a300d071b6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 200 insertions, 0 deletions

diff --git a/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportaltheme.cpp b/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportaltheme.cpp
new file mode 100644
index 0000000000..f07ca3f098
--- /dev/null
+++ b/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportaltheme.cpp
@@ -0,0 +1,200 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 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 "qxdgdesktopportaltheme.h"
+#include "qxdgdesktopportalfiledialog_p.h"
+
+#include <private/qguiapplication_p.h>
+#include <qpa/qplatformtheme_p.h>
+#include <qpa/qplatformthemefactory_p.h>
+#include <qpa/qplatformintegration.h>
+
+QT_BEGIN_NAMESPACE
+
+class QXdgDesktopPortalThemePrivate : public QPlatformThemePrivate
+{
+public:
+    QXdgDesktopPortalThemePrivate()
+        : QPlatformThemePrivate()
+    { }
+
+    ~QXdgDesktopPortalThemePrivate()
+    {
+        delete baseTheme;
+    }
+
+    QPlatformTheme *baseTheme;
+};
+
+QXdgDesktopPortalTheme::QXdgDesktopPortalTheme()
+    : d_ptr(new QXdgDesktopPortalThemePrivate)
+{
+    Q_D(QXdgDesktopPortalTheme);
+
+    QStringList themeNames;
+    themeNames += QGuiApplicationPrivate::platform_integration->themeNames();
+    // 1) Look for a theme plugin.
+    for (const QString &themeName : qAsConst(themeNames)) {
+        d->baseTheme = QPlatformThemeFactory::create(themeName, nullptr);
+        if (d->baseTheme)
+            break;
+    }
+
+    // 2) If no theme plugin was found ask the platform integration to
+    // create a theme
+    if (!d->baseTheme) {
+        for (const QString &themeName : qAsConst(themeNames)) {
+            d->baseTheme = QGuiApplicationPrivate::platform_integration->createPlatformTheme(themeName);
+            if (d->baseTheme)
+                break;
+        }
+        // No error message; not having a theme plugin is allowed.
+    }
+
+    // 3) Fall back on the built-in "null" platform theme.
+    if (!d->baseTheme)
+        d->baseTheme = new QPlatformTheme;
+}
+
+QPlatformMenuItem* QXdgDesktopPortalTheme::createPlatformMenuItem() const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->createPlatformMenuItem();
+}
+
+QPlatformMenu* QXdgDesktopPortalTheme::createPlatformMenu() const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->createPlatformMenu();
+}
+
+QPlatformMenuBar* QXdgDesktopPortalTheme::createPlatformMenuBar() const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->createPlatformMenuBar();
+}
+
+void QXdgDesktopPortalTheme::showPlatformMenuBar()
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->showPlatformMenuBar();
+}
+
+bool QXdgDesktopPortalTheme::usePlatformNativeDialog(DialogType type) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+
+    if (type == FileDialog)
+        return true;
+
+    return d->baseTheme->usePlatformNativeDialog(type);
+}
+
+QPlatformDialogHelper* QXdgDesktopPortalTheme::createPlatformDialogHelper(DialogType type) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+
+    if (type == FileDialog) {
+        if (d->baseTheme->usePlatformNativeDialog(type))
+            return new QXdgDesktopPortalFileDialog(static_cast<QPlatformFileDialogHelper*>(d->baseTheme->createPlatformDialogHelper(type)));
+
+        return new QXdgDesktopPortalFileDialog;
+    }
+
+    return d->baseTheme->createPlatformDialogHelper(type);
+}
+
+#ifndef QT_NO_SYSTEMTRAYICON
+QPlatformSystemTrayIcon* QXdgDesktopPortalTheme::createPlatformSystemTrayIcon() const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->createPlatformSystemTrayIcon();
+}
+#endif
+
+const QPalette *QXdgDesktopPortalTheme::palette(Palette type) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->palette(type);
+}
+
+const QFont* QXdgDesktopPortalTheme::font(Font type) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->font(type);
+}
+
+QVariant QXdgDesktopPortalTheme::themeHint(ThemeHint hint) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->themeHint(hint);
+}
+
+QPixmap QXdgDesktopPortalTheme::standardPixmap(StandardPixmap sp, const QSizeF &size) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->standardPixmap(sp, size);
+}
+
+QIcon QXdgDesktopPortalTheme::fileIcon(const QFileInfo &fileInfo,
+                              QPlatformTheme::IconOptions iconOptions) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->fileIcon(fileInfo, iconOptions);
+}
+
+QIconEngine * QXdgDesktopPortalTheme::createIconEngine(const QString &iconName) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->createIconEngine(iconName);
+}
+
+QList<QKeySequence> QXdgDesktopPortalTheme::keyBindings(QKeySequence::StandardKey key) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->keyBindings(key);
+}
+
+QString QXdgDesktopPortalTheme::standardButtonText(int button) const
+{
+    Q_D(const QXdgDesktopPortalTheme);
+    return d->baseTheme->standardButtonText(button);
+}
+
+QT_END_NAMESPACE