Import QML preview plugin into Qt Creator

... and relicense it as GPL or Commercial.

Fixes: QTCREATORBUG-21838
Change-Id: I28d58ee963e1c63aa4a8bbe4525faade7201c353
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/qmlpreview/qmlpreviewruncontrol.h

@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "qmlpreviewconnectionmanager.h"
+#include "qmlpreviewfileontargetfinder.h"
+#include "qmlpreviewplugin.h"
+#include <projectexplorer/runconfiguration.h>
+
+namespace QmlPreview {
+
+class QmlPreviewRunner : public ProjectExplorer::RunWorker
+{
+    Q_OBJECT
+
+public:
+    QmlPreviewRunner(ProjectExplorer::RunControl *runControl, QmlPreviewFileLoader fileLoader,
+                     QmlPreviewFileClassifier fileClassifier, QmlPreviewFpsHandler fpsHandler,
+                     float initialZoom, const QString &initialLocale);
+
+    void setServerUrl(const QUrl &serverUrl);
+    QUrl serverUrl() const;
+
+signals:
+    void loadFile(const QString &previewedFile, const QString &changedFile,
+                  const QByteArray &contents);
+    void language(const QString &locale);
+    void zoom(float zoomFactor);
+    void rerun();
+    void ready();
+
+private:
+    void start() override;
+    void stop() override;
+
+    QScopedPointer<Internal::QmlPreviewConnectionManager> m_connectionManager;
+};
+
+class LocalQmlPreviewSupport : public ProjectExplorer::SimpleTargetRunner
+{
+    Q_OBJECT
+
+public:
+    LocalQmlPreviewSupport(ProjectExplorer::RunControl *runControl);
+};
+
+} // namespace QmlPreview