Python: add PySide installation check on document open

Checks if the document imports PySide and whether the selected python
interpreter can find a PySide installation. If not show a global info
bar that can install PySide via pip like the python lsp server.

Task-number: PYSIDE-1742
Change-Id: I02c0d5f6eb268f3d8826d4fb9d9ec3c7c48b8638
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/python/pyside.h

@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 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 "pipsupport.h"
+
+#include <utils/filepath.h>
+
+#include <QTextDocument>
+
+namespace TextEditor { class TextDocument; }
+namespace Python {
+namespace Internal {
+
+class PythonRunConfiguration;
+
+class PySideInstaller : public QObject
+{
+    Q_DECLARE_TR_FUNCTIONS(Python::Internal::PySideInstaller)
+public:
+    static PySideInstaller *instance();
+    void checkPySideInstallation(const Utils::FilePath &python, TextEditor::TextDocument *document);
+
+private:
+    PySideInstaller();
+
+    void installPyside(const Utils::FilePath &python,
+                       const QString &pySide, TextEditor::TextDocument *document);
+    void changeInterpreter(const QString &interpreterId, PythonRunConfiguration *runConfig);
+    void handlePySideMissing(const Utils::FilePath &python,
+                             const QString &pySide,
+                             TextEditor::TextDocument *document);
+
+    void runPySideChecker(const Utils::FilePath &python,
+                          const QString &pySide,
+                          TextEditor::TextDocument *document);
+    static bool missingPySideInstallation(const Utils::FilePath &python, const QString &pySide);
+    static QString importedPySide(const QString &text);
+
+    QHash<Utils::FilePath, QList<TextEditor::TextDocument *>> m_infoBarEntries;
+};
+
+} // namespace Internal
+} // namespace Python