QmlDebug: Add V4 debug client from tst_qqmldebugjs.cpp

This is useful for implementing additional V4 debug clients.

Along the way, we also drop the dependency on QML by using the JSON API
from QtCore for JSON manipulation.

Task-number: QTBUG-66504
Change-Id: Ib51e8e97b030a49fe8185ad5354d1cca63efef4a
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 121 insertions, 0 deletions

diff --git a/src/qmldebug/qv4debugclient_p.h b/src/qmldebug/qv4debugclient_p.h
new file mode 100644
index 0000000000..fdcf4284c5
--- /dev/null
+++ b/src/qmldebug/qv4debugclient_p.h
@@ -0,0 +1,121 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml module 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QV4DEBUGCLIENT_P_H
+#define QV4DEBUGCLIENT_P_H
+
+#include <QtQmlDebug/private/qqmldebugclient_p.h>
+#include <QtCore/qjsonvalue.h>
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+QT_BEGIN_NAMESPACE
+
+class QV4DebugClientPrivate;
+class QV4DebugClient : public QQmlDebugClient
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QV4DebugClient)
+
+public:
+    enum StepAction
+    {
+        Continue,
+        In,
+        Out,
+        Next
+    };
+
+    enum Exception
+    {
+        All,
+        Uncaught
+    };
+
+    struct Response
+    {
+        QString command;
+        QJsonValue body;
+    };
+
+    QV4DebugClient(QQmlDebugConnection *connection);
+
+    void connect();
+    void disconnect();
+
+    void interrupt();
+    void continueDebugging(StepAction stepAction);
+    void evaluate(const QString &expr, int frame = -1, int context = -1);
+    void lookup(const QList<int> &handles, bool includeSource = false);
+    void backtrace(int fromFrame = -1, int toFrame = -1, bool bottom = false);
+    void frame(int number = -1);
+    void scope(int number = -1, int frameNumber = -1);
+    void scripts(int types = 4, const QList<int> &ids = QList<int>(), bool includeSource = false);
+    void setBreakpoint(const QString &target, int line = -1, int column = -1, bool enabled = true,
+                       const QString &condition = QString(), int ignoreCount = -1);
+    void clearBreakpoint(int breakpoint);
+    void changeBreakpoint(int breakpoint, bool enabled);
+    void setExceptionBreak(Exception type, bool enabled = false);
+    void version();
+
+    Response response() const;
+
+protected:
+    void messageReceived(const QByteArray &data) override;
+
+signals:
+    void connected();
+    void interrupted();
+    void result();
+    void failure();
+    void stopped();
+};
+
+QT_END_NAMESPACE
+
+#endif // QV4DEBUGCLIENT_P_H