qscriptvalue.cpp

奇趣公司比较新的qt/emd版本

  \sa isQMetaObject()
*/
const QMetaObject *QScriptValue::toQMetaObject() const
{
    return QScriptValuePrivate::valueOf(*this).toQMetaObject();
}

/*!
  Sets the value of this QScriptValue's property with the given \a name to
  the given \a value.

  If this QScriptValue is not an object, this function does nothing.

  If this QScriptValue does not already have a property with name \a name,
  a new property is created; the given \a flags then specify how this
  property may be accessed by script code.

  If \a value is invalid, the property is removed.

  If the property is implemented using a setter function (i.e. has the
  PropertySetter flag set), calling setProperty() has side-effects on
  the script engine, since the setter function will be called with the
  given \a value as argument (possibly resulting in an uncaught script
  exception).

  Note that you cannot specify custom getter or setter functions for
  built-in properties, such as the \c{length} property of Array objects
  or meta properties of QObject objects.

  \sa property()
*/
void QScriptValue::setProperty(const QString &name, const QScriptValue &value,
                               const PropertyFlags &flags)
{
    if (isValid() && value.isValid() && (value.engine() != engine())) {
        qWarning("QScriptValue::setProperty(%s) failed: "
                 "cannot set value created in a different engine",
                 qPrintable(name));
        return;
    }
    QScriptValuePrivate::valueOf(*this).setProperty(name, QScriptValuePrivate::valueOf(value), flags);
}

/*!
  Returns the value of this QScriptValue's property with the given \a name,
  using the given \a mode to resolve the property.

  If no such property exists, an invalid QScriptValue is returned.

  If the property is implemented using a getter function (i.e. has the
  PropertyGetter flag set), calling property() has side-effects on the
  script engine, since the getter function will be called (possibly
  resulting in an uncaught script exception). If an exception
  occurred, property() returns the value that was thrown (typically
  an \c{Error} object).

  \sa setProperty(), propertyFlags()
*/
QScriptValue QScriptValue::property(const QString &name,
                                    const ResolveFlags &mode) const
{
    return QScriptValuePrivate::valueOf(*this).property(name, mode);
}

/*!
  \overload

  Returns the property at the given \a arrayIndex, using the given \a
  mode to resolve the property.

  This function is provided for convenience and performance when
  working with array objects.

  If this QScriptValue is not an Array object, this function behaves
  as if property() was called with the string representation of \a
  arrayIndex.
*/
QScriptValue QScriptValue::property(quint32 arrayIndex,
                                    const ResolveFlags &mode) const
{
    return QScriptValuePrivate::valueOf(*this).property(arrayIndex, mode);
}

/*!
  \overload

  Sets the property at the given \a arrayIndex to the given \a value.

  This function is provided for convenience and performance when
  working with array objects.

  If this QScriptValue is not an Array object, this function behaves
  as if setProperty() was called with the string representation of \a
  arrayIndex.
*/
void QScriptValue::setProperty(quint32 arrayIndex, const QScriptValue &value,
                               const PropertyFlags &flags)
{
    if (isValid() && value.isValid() && (value.engine() != engine())) {
        qWarning("QScriptValue::setProperty() failed: "
                 "cannot set value created in a different engine");
        return;
    }
    QScriptValuePrivate::valueOf(*this).setProperty(arrayIndex, QScriptValuePrivate::valueOf(value), flags);
}

/*!
  Returns the flags of the property with the given \a name, using the
  given \a mode to resolve the property.

  \sa property()
*/
QScriptValue::PropertyFlags QScriptValue::propertyFlags(const QString &name,
                                                        const ResolveFlags &mode) const
{
    return QScriptValuePrivate::valueOf(*this).propertyFlags(name, mode);
}

/*!
  Calls this QScriptValue as a function, using \a thisObject as
  the `this' object in the function call, and passing \a args
  as arguments to the function. Returns the value returned from
  the function.

  If this QScriptValue is not a function, call() does nothing
  and returns an invalid QScriptValue.

  Note that if \a thisObject is not an object, the global object
  (see \l{QScriptEngine::globalObject()}) will be used as the
  `this' object.

  Calling call() can cause an exception to occur in the script engine;
  in that case, call() returns the value that was thrown (typically an
  \c{Error} object). You can call
  QScriptEngine::hasUncaughtException() to determine if an exception
  occurred.

  \sa construct()
*/
QScriptValue QScriptValue::call(const QScriptValue &thisObject,
                                const QScriptValueList &args)
{
    if (isFunction() && thisObject.isValid() && (thisObject.engine() != engine())) {
        qWarning("QScriptValue::call() failed: "
                 "cannot call function with thisObject created in "
                 "a different engine");
        return QScriptValue();
    }
    return QScriptValuePrivate::valueOf(*this).call(QScriptValuePrivate::valueOf(thisObject),
                                                    QScriptValuePrivate::toImplList(args));
}

/*!
  Calls this QScriptValue as a function, using \a thisObject as
  the `this' object in the function call, and passing \a arguments
  as arguments to the function. Returns the value returned from
  the function.

  If this QScriptValue is not a function, call() does nothing
  and returns an invalid QScriptValue.

  \a arguments can be an arguments object, an array, null or
  undefined; any other type will cause a TypeError to be thrown.

  Note that if \a thisObject is not an object, the global object
  (see \l{QScriptEngine::globalObject()}) will be used as the
  `this' object.

  \sa construct(), QScriptContext::argumentsObject()
*/
QScriptValue QScriptValue::call(const QScriptValue &thisObject,
                                const QScriptValue &arguments)
{
    if (isFunction() && thisObject.isValid() && (thisObject.engine() != engine())) {
        qWarning("QScriptValue::call() failed: "
                 "cannot call function with thisObject created in "
                 "a different engine");
        return QScriptValue();
    }
    return QScriptValuePrivate::valueOf(*this).call(QScriptValuePrivate::valueOf(thisObject),
                                                    QScriptValuePrivate::valueOf(arguments));
}

/*!
  Creates a new \c{Object} and calls this QScriptValue as a constructor,
  using the created object as the `this' object and passing \a args
  as arguments. If the return value from the constructor call is an
  object, then that object is returned; otherwise the created object
  is returned.

  If this QScriptValue is not a function, construct() does nothing
  and returns an invalid QScriptValue.

  \a args can be an arguments object, an array, null or
  undefined; any other type will cause a TypeError to be thrown.

  Calling construct() can cause an exception to occur in the script
  engine; in that case, construct() returns the value that was thrown
  (typically an \c{Error} object). You can call
  QScriptEngine::hasUncaughtException() to determine if an exception
  occurred.

  \sa call(), QScriptEngine::newObject()
*/
QScriptValue QScriptValue::construct(const QScriptValueList &args)
{
    return QScriptValuePrivate::valueOf(*this).construct(QScriptValuePrivate::toImplList(args));
}

/*!
  Creates a new \c{Object} and calls this QScriptValue as a constructor,
  using the created object as the `this' object and passing \a arguments
  as arguments. If the return value from the constructor call is an
  object, then that object is returned; otherwise the created object
  is returned.

  If this QScriptValue is not a function, construct() does nothing
  and returns an invalid QScriptValue.

  \a arguments can be an arguments object, an array, null or
  undefined. Any other type will cause a TypeError to be thrown.

  \sa call(), QScriptEngine::newObject(), QScriptContext::argumentsObject()
*/
QScriptValue QScriptValue::construct(const QScriptValue &arguments)
{
    return QScriptValuePrivate::valueOf(*this).construct(QScriptValuePrivate::valueOf(arguments));
}

/*!
  Returns the QScriptEngine that created this QScriptValue,
  or 0 if this QScriptValue is invalid.
*/
QScriptEngine *QScriptValue::engine() const
{
    return QScriptValuePrivate::valueOf(*this).engine();
}

/*!
  Returns true if this QScriptValue is of the primitive type Boolean;
  otherwise returns false.

  \sa toBoolean()
*/
bool QScriptValue::isBoolean() const
{
    return QScriptValuePrivate::valueOf(*this).isBoolean();
}

/*!
  Returns true if this QScriptValue is of the primitive type Number;
  otherwise returns false.

  \sa toNumber()
*/
bool QScriptValue::isNumber() const
{
    return QScriptValuePrivate::valueOf(*this).isNumber();
}

/*!
  Returns true if this QScriptValue is of the primitive type String;
  otherwise returns false.

  \sa toString()
*/
bool QScriptValue::isString() const
{
    return QScriptValuePrivate::valueOf(*this).isString();
}

/*!
  Returns true if this QScriptValue is a function; otherwise returns
  false.

  \sa call()
*/
bool QScriptValue::isFunction() const
{
    return QScriptValuePrivate::valueOf(*this).isFunction();
}

/*!
  Returns true if this QScriptValue is of the primitive type Null;
  otherwise returns false.

  \sa QScriptEngine::nullValue()
*/
bool QScriptValue::isNull() const
{
    return QScriptValuePrivate::valueOf(*this).isNull();
}

/*!
  Returns true if this QScriptValue is of the primitive type Undefined;
  otherwise returns false.

  \sa QScriptEngine::undefinedValue()
*/
bool QScriptValue::isUndefined() const
{
    return QScriptValuePrivate::valueOf(*this).isUndefined();
}

/*!
  Returns true if this QScriptValue is of the Object type; otherwise
  returns false.

  Note that function values, variant values, and QObject values are
  objects, so this function returns true for such values.

  \sa toObject(), QScriptEngine::newObject()
*/
bool QScriptValue::isObject() const
{
    return QScriptValuePrivate::valueOf(*this).isObject();
}

/*!
  Returns true if this QScriptValue is a variant value;
  otherwise returns false.

  \sa toVariant(), QScriptEngine::newVariant()
*/
bool QScriptValue::isVariant() const
{
    return QScriptValuePrivate::valueOf(*this).isVariant();
}

/*!
  Returns true if this QScriptValue is a QObject; otherwise returns
  false.

  Note: This function returns true even if the QObject that this
  QScriptValue wraps has been deleted.

  \sa toQObject(), QScriptEngine::newQObject()
*/
bool QScriptValue::isQObject() const
{
    return QScriptValuePrivate::valueOf(*this).isQObject();
}

/*!
  Returns true if this QScriptValue is a QMetaObject; otherwise returns
  false.

  \sa toQMetaObject(), QScriptEngine::newQMetaObject()
*/
bool QScriptValue::isQMetaObject() const
{
    return QScriptValuePrivate::valueOf(*this).isQMetaObject();
}

/*!
  Returns true if this QScriptValue is valid; otherwise returns
  false.
*/
bool QScriptValue::isValid() const
{
    return QScriptValuePrivate::valueOf(*this).isValid();
}

#endif // QT_NO_SCRIPT