1 files changed, 130 insertions, 0 deletions
diff --git a/src/qml/jsapi/qjsmanagedvalue.h b/src/qml/jsapi/qjsmanagedvalue.h
new file mode 100644
index 0000000000..a6f67b0cc0
--- /dev/null
+++ b/src/qml/jsapi/qjsmanagedvalue.h
@@ -0,0 +1,130 @@
+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QJSMANAGEDVALUE_H
+#define QJSMANAGEDVALUE_H
+
+#include <QtQml/qtqmlglobal.h>
+#include <QtQml/qjsprimitivevalue.h>
+#include <QtQml/qjsvalue.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+struct Value;
+struct ExecutionEngine;
+}
+
+class QJSEngine;
+class Q_QML_EXPORT QJSManagedValue
+{
+    Q_DISABLE_COPY(QJSManagedValue)
+public:
+    enum Type {
+        Undefined,
+        Boolean,
+        Number,
+        String,
+        Object,
+        Symbol,
+        Function
+    };
+
+    QJSManagedValue() = default;
+    QJSManagedValue(QJSValue value, QJSEngine *engine);
+    QJSManagedValue(const QJSPrimitiveValue &value, QJSEngine *engine);
+    QJSManagedValue(const QVariant &variant, QJSEngine *engine);
+    QJSManagedValue(const QString &string, QJSEngine *engine);
+
+    ~QJSManagedValue();
+    QJSManagedValue(QJSManagedValue &&other);
+    QJSManagedValue &operator=(QJSManagedValue &&other);
+
+    bool equals(const QJSManagedValue &other) const;
+    bool strictlyEquals(const QJSManagedValue &other) const;
+
+    QJSEngine *engine() const;
+
+    QJSManagedValue prototype() const;
+    void setPrototype(const QJSManagedValue &prototype);
+
+    Type type() const;
+
+    // Compatibility with QJSValue
+    bool isUndefined() const { return type() == Undefined; }
+    bool isBoolean() const { return type() == Boolean; }
+    bool isNumber() const { return type() == Number; }
+    bool isString() const { return type() == String; }
+    bool isObject() const { return type() == Object; }
+    bool isSymbol() const { return type() == Symbol; }
+    bool isFunction() const { return type() == Function; }
+
+    // Special case of Number
+    bool isInteger() const;
+
+    // Selected special cases of Object
+    bool isNull() const;
+    bool isRegularExpression() const;
+    bool isArray() const;
+    bool isUrl() const;
+    bool isVariant() const;
+    bool isQObject() const;
+    bool isQMetaObject() const;
+    bool isDate() const;
+    bool isError() const;
+    bool isJsMetaType() const;
+
+    // Native type transformations
+    QString toString() const;
+    double toNumber() const;
+    bool toBoolean() const;
+
+    // Variant-like type transformations
+    QJSPrimitiveValue toPrimitive() const;
+    QJSValue toJSValue() const;
+    QVariant toVariant() const;
+
+    // Special cases
+    int toInteger() const;
+    QRegularExpression toRegularExpression() const;
+    QUrl toUrl() const;
+    QObject *toQObject() const;
+    const QMetaObject *toQMetaObject() const;
+    QDateTime toDateTime() const;
+
+    // Properties of objects
+    bool hasProperty(const QString &name) const;
+    bool hasOwnProperty(const QString &name) const;
+    QJSValue property(const QString &name) const;
+    void setProperty(const QString &name, const QJSValue &value);
+    bool deleteProperty(const QString &name);
+
+    //  ### Qt 7 use qsizetype instead.
+    // Array indexing
+    bool hasProperty(quint32 arrayIndex) const;
+    bool hasOwnProperty(quint32 arrayIndex) const;
+    QJSValue property(quint32 arrayIndex) const;
+    void setProperty(quint32 arrayIndex, const QJSValue &value);
+    bool deleteProperty(quint32 arrayIndex);
+
+    // Calling functions
+    QJSValue call(const QJSValueList &arguments = {}) const;
+    QJSValue callWithInstance(const QJSValue &instance, const QJSValueList &arguments = {}) const;
+    QJSValue callAsConstructor(const QJSValueList &arguments = {}) const;
+
+    // JavaScript metatypes
+    QJSManagedValue jsMetaType() const;
+    QStringList jsMetaMembers() const;
+    QJSManagedValue jsMetaInstantiate(const QJSValueList &values = {}) const;
+
+private:
+    friend class QJSValue;
+    friend class QJSEngine;
+
+    QJSManagedValue(QV4::ExecutionEngine *engine);
+    QV4::Value *d = nullptr;
+};
+
+QT_END_NAMESPACE
+
+#endif