aboutsummaryrefslogtreecommitdiffstats
path: root/src/qml/jsapi/qjsengine.h
blob: 41c4b81270ecc00ea329319a808aed3a41a1639a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
/****************************************************************************
**
** Copyright (C) 2016 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 QJSENGINE_H
#define QJSENGINE_H

#include <QtCore/qmetatype.h>

#include <QtCore/qvariant.h>
#include <QtCore/qsharedpointer.h>
#include <QtCore/qobject.h>
#include <QtQml/qjsvalue.h>

QT_BEGIN_NAMESPACE


class QV8Engine;

template <typename T>
inline T qjsvalue_cast(const QJSValue &);

class QJSEnginePrivate;
class Q_QML_EXPORT QJSEngine
    : public QObject
{
    Q_OBJECT
public:
    QJSEngine();
    explicit QJSEngine(QObject *parent);
    virtual ~QJSEngine();

    QJSValue globalObject() const;

    QJSValue evaluate(const QString &program, const QString &fileName = QString(), int lineNumber = 1);

    QJSValue newObject();
    QJSValue newArray(uint length = 0);

    QJSValue newQObject(QObject *object);

    QJSValue newQMetaObject(const QMetaObject* metaObject);

    template <typename T>
    QJSValue newQMetaObject()
    {
        return newQMetaObject(&T::staticMetaObject);
    }

    template <typename T>
    inline QJSValue toScriptValue(const T &value)
    {
        return create(qMetaTypeId<T>(), &value);
    }
    template <typename T>
    inline T fromScriptValue(const QJSValue &value)
    {
        return qjsvalue_cast<T>(value);
    }

    void collectGarbage();

#if QT_DEPRECATED_SINCE(5, 6)
    QT_DEPRECATED void installTranslatorFunctions(const QJSValue &object = QJSValue());
#endif

    enum Extension {
        TranslationExtension = 0x1,
        ConsoleExtension = 0x2,
        GarbageCollectionExtension = 0x4,
        AllExtensions = 0xffffffff
    };
    Q_DECLARE_FLAGS(Extensions, Extension)

    void installExtensions(Extensions extensions, const QJSValue &object = QJSValue());

    QV8Engine *handle() const { return d; }

private:
    QJSValue create(int type, const void *ptr);

    static bool convertV2(const QJSValue &value, int type, void *ptr);

    friend inline bool qjsvalue_cast_helper(const QJSValue &, int, void *);

protected:
    QJSEngine(QJSEnginePrivate &dd, QObject *parent = Q_NULLPTR);

private:
    QV8Engine *d;
    Q_DISABLE_COPY(QJSEngine)
    Q_DECLARE_PRIVATE(QJSEngine)
    friend class QV8Engine;
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QJSEngine::Extensions)

inline bool qjsvalue_cast_helper(const QJSValue &value, int type, void *ptr)
{
    return QJSEngine::convertV2(value, type, ptr);
}

template<typename T>
T qjsvalue_cast(const QJSValue &value)
{
    T t;
    const int id = qMetaTypeId<T>();

    if (qjsvalue_cast_helper(value, id, &t))
        return t;
    else if (value.isVariant())
        return qvariant_cast<T>(value.toVariant());

    return T();
}

template <>
inline QVariant qjsvalue_cast<QVariant>(const QJSValue &value)
{
    return value.toVariant();
}

Q_QML_EXPORT QJSEngine *qjsEngine(const QObject *);

QT_END_NAMESPACE

#endif // QJSENGINE_H