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diff --git a/src/script/qscriptvalue.cpp b/src/script/qscriptvalue.cpp new file mode 100644 index 0000000..a253985 --- /dev/null +++ b/src/script/qscriptvalue.cpp @@ -0,0 +1,1595 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtScript module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qscriptvalue.h" + +#ifndef QT_NO_SCRIPT + +#include "qscriptvalue_p.h" +#include "qscriptengine_p.h" +#include "qscriptvalueimpl_p.h" +#include "qscriptcontext_p.h" +#include "qscriptmember_p.h" +#include "qscriptobject_p.h" +#include "qscriptclass.h" +#include "qscriptclass_p.h" + +#include <QtCore/QDateTime> +#include <QtCore/QRegExp> + +QT_BEGIN_NAMESPACE + +/*! + \since 4.3 + \class QScriptValue + + \brief The QScriptValue class acts as a container for the Qt Script data types. + + \ingroup script + \mainclass + + QScriptValue supports the types defined in the \l{ECMA-262} + standard: The primitive types, which are Undefined, Null, Boolean, + Number, and String; and the Object type. Additionally, Qt Script + has built-in support for QVariant, QObject and QMetaObject. + + For the object-based types (including Date and RegExp), use the + newT() functions in QScriptEngine (e.g. QScriptEngine::newObject()) + to create a QScriptValue of the desired type. For the primitive types, + use one of the QScriptValue constructor overloads. + + The methods named isT() (e.g. isBool(), isUndefined()) can be + used to test if a value is of a certain type. The methods named + toT() (e.g. toBool(), toString()) can be used to convert a + QScriptValue to another type. You can also use the generic + qscriptvalue_cast() function. + + Object values have zero or more properties which are themselves + QScriptValues. Use setProperty() to set a property of an object, and + call property() to retrieve the value of a property. + + \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 0 + + Each property can have a set of attributes; these are specified as + the third (optional) argument to setProperty(). The attributes of a + property can be queried by calling the propertyFlags() function. The + following code snippet creates a property that cannot be modified by + script code: + + \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 1 + + If you want to iterate over the properties of a script object, use + the QScriptValueIterator class. + + Object values have an internal \c{prototype} property, which can be + accessed with prototype() and setPrototype(). Properties added to a + prototype are shared by all objects having that prototype; this is + referred to as prototype-based inheritance. In practice, it means + that (by default) the property() function will automatically attempt + to look up look the property in the prototype() (and in the + prototype of the prototype(), and so on), if the object itself does + not have the requested property. Note that this prototype-based + lookup is not performed by setProperty(); setProperty() will always + create the property in the script object itself. For more + information, see the \l{QtScript} documentation. + + Function objects (objects for which isFunction() returns true) can + be invoked by calling call(). Constructor functions can be used to + construct new objects by calling construct(). + + Use equals(), strictlyEquals() and lessThan() to compare a QScriptValue + to another. + + Object values can have custom data associated with them; see the + setData() and data() functions. By default, this data is not + accessible to scripts; it can be used to store any data you want to + associate with the script object. Typically this is used by custom + class objects (see QScriptClass) to store a C++ type that contains + the "native" object data. + + Note that a QScriptValue for which isObject() is true only carries a + reference to an actual object; copying the QScriptValue will only + copy the object reference, not the object itself. If you want to + clone an object (i.e. copy an object's properties to another + object), you can do so with the help of a \c{for-in} statement in + script code, or QScriptValueIterator in C++. + + \sa QScriptEngine, QScriptValueIterator +*/ + +/*! + \enum QScriptValue::SpecialValue + + This enum is used to specify a single-valued type. + + \value UndefinedValue An undefined value. + + \value NullValue A null value. +*/ + +/*! + \enum QScriptValue::PropertyFlag + + This enum describes the attributes of a property. + + \value ReadOnly The property is read-only. Attempts by Qt Script code to write to the property will be ignored. + + \value Undeletable Attempts by Qt Script code to \c{delete} the property will be ignored. + + \value SkipInEnumeration The property is not to be enumerated by a \c{for-in} enumeration. + + \value PropertyGetter The property is defined by a function which will be called to get the property value. + + \value PropertySetter The property is defined by a function which will be called to set the property value. + + \value QObjectMember This flag is used to indicate that an existing property is a QObject member (a property or method). + + \value KeepExistingFlags This value is used to indicate to setProperty() that the property's flags should be left unchanged. If the property doesn't exist, the default flags (0) will be used. + + \value UserRange Flags in this range are not used by Qt Script, and can be used for custom purposes. +*/ + +/*! + \enum QScriptValue::ResolveFlag + + This enum specifies how to look up a property of an object. + + \value ResolveLocal Only check the object's own properties. + + \value ResolvePrototype Check the object's own properties first, then search the prototype chain. This is the default. + + \value ResolveScope Check the object's own properties first, then search the scope chain. + + \value ResolveFull Check the object's own properties first, then search the prototype chain, and finally search the scope chain. +*/ + +/*! + Constructs an invalid QScriptValue. +*/ +QScriptValue::QScriptValue() + : d_ptr(0) +{ +} + +/*! + Destroys this QScriptValue. +*/ +QScriptValue::~QScriptValue() +{ + if (d_ptr && !d_ptr->ref.deref()) { + if (engine()) { + QScriptEnginePrivate::get(engine())->unregisterValue(d_ptr); + } else { + delete d_ptr; + } + d_ptr = 0; + } +} + +/*! + Constructs a new QScriptValue that is a copy of \a other. + + Note that if \a other is an object (i.e., isObject() would return + true), then only a reference to the underlying object is copied into + the new script value (i.e., the object itself is not copied). +*/ +QScriptValue::QScriptValue(const QScriptValue &other) + : d_ptr(other.d_ptr) +{ + if (d_ptr) + d_ptr->ref.ref(); +} + +/*! + \obsolete + + Constructs a new QScriptValue with the special \a value and + registers it with the script \a engine. +*/ +QScriptValue::QScriptValue(QScriptEngine *engine, QScriptValue::SpecialValue value) +{ + if (engine) { + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine); + d_ptr = eng_p->registerValue(QScriptValueImpl(value)); + d_ptr->ref.ref(); + } else { + d_ptr = 0; + } +} + +/*! + \obsolete + + \fn QScriptValue::QScriptValue(QScriptEngine *engine, bool value) + + Constructs a new QScriptValue with the boolean \a value and + registers it with the script \a engine. +*/ +QScriptValue::QScriptValue(QScriptEngine *engine, bool val) +{ + if (engine) { + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine); + d_ptr = eng_p->registerValue(QScriptValueImpl(val)); + d_ptr->ref.ref(); + } else { + d_ptr = 0; + } +} + +/*! + \fn QScriptValue::QScriptValue(QScriptEngine *engine, int value) + \obsolete + + Constructs a new QScriptValue with the integer \a value and + registers it with the script \a engine. +*/ +QScriptValue::QScriptValue(QScriptEngine *engine, int val) +{ + if (engine) { + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine); + d_ptr = eng_p->registerValue(QScriptValueImpl(val)); + d_ptr->ref.ref(); + } else { + d_ptr = 0; + } +} + +/*! + \fn QScriptValue::QScriptValue(QScriptEngine *engine, uint value) + \obsolete + + Constructs a new QScriptValue with the unsigned integer \a value and + registers it with the script \a engine. + */ +QScriptValue::QScriptValue(QScriptEngine *engine, uint val) +{ + if (engine) { + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine); + d_ptr = eng_p->registerValue(QScriptValueImpl(val)); + d_ptr->ref.ref(); + } else { + d_ptr = 0; + } +} + +/*! + \fn QScriptValue::QScriptValue(QScriptEngine *engine, qsreal value) + \obsolete + + Constructs a new QScriptValue with the qsreal \a value and + registers it with the script \a engine. +*/ +QScriptValue::QScriptValue(QScriptEngine *engine, qsreal val) +{ + if (engine) { + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine); + d_ptr = eng_p->registerValue(QScriptValueImpl(val)); + d_ptr->ref.ref(); + } else { + d_ptr = 0; + } +} + +/*! + \fn QScriptValue::QScriptValue(QScriptEngine *engine, const QString &value) + \obsolete + + Constructs a new QScriptValue with the string \a value and + registers it with the script \a engine. +*/ +QScriptValue::QScriptValue(QScriptEngine *engine, const QString &val) +{ + if (engine) { + QScriptValueImpl v; + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine); + eng_p->newString(&v, val); + d_ptr = eng_p->registerValue(v); + d_ptr->ref.ref(); + } else { + d_ptr = 0; + } +} + +/*! + \fn QScriptValue::QScriptValue(QScriptEngine *engine, const char *value) + \obsolete + + Constructs a new QScriptValue with the string \a value and + registers it with the script \a engine. +*/ + +#ifndef QT_NO_CAST_FROM_ASCII +QScriptValue::QScriptValue(QScriptEngine *engine, const char *val) +{ + if (engine) { + QScriptValueImpl v; + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine); + eng_p->newString(&v, QString::fromAscii(val)); + d_ptr = eng_p->registerValue(v); + d_ptr->ref.ref(); + } else { + d_ptr = 0; + } +} +#endif + +/*! + \since 4.5 + + Constructs a new QScriptValue with a special \a value. +*/ +QScriptValue::QScriptValue(SpecialValue value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value = QScriptValueImpl(value); + d_ptr->ref.ref(); +} + +/*! + \since 4.5 + + Constructs a new QScriptValue with a boolean \a value. +*/ +QScriptValue::QScriptValue(bool value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value = QScriptValueImpl(value); + d_ptr->ref.ref(); +} + +/*! + \since 4.5 + + Constructs a new QScriptValue with a number \a value. +*/ +QScriptValue::QScriptValue(int value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value = QScriptValueImpl(value); + d_ptr->ref.ref(); +} + +/*! + \since 4.5 + + Constructs a new QScriptValue with a number \a value. +*/ +QScriptValue::QScriptValue(uint value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value = QScriptValueImpl(value); + d_ptr->ref.ref(); +} + +/*! + \since 4.5 + + Constructs a new QScriptValue with a number \a value. +*/ +QScriptValue::QScriptValue(qsreal value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value = QScriptValueImpl(value); + d_ptr->ref.ref(); +} + +/*! + \since 4.5 + + Constructs a new QScriptValue with a string \a value. +*/ +QScriptValue::QScriptValue(const QString &value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value.m_type = QScript::LazyStringType; + d_ptr->value.m_lazy_string_value = new QString(value); + d_ptr->ref.ref(); +} + +/*! + \since 4.5 + + Constructs a new QScriptValue with a string \a value. +*/ +QScriptValue::QScriptValue(const QLatin1String &value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value.m_type = QScript::LazyStringType; + d_ptr->value.m_lazy_string_value = new QString(value); + d_ptr->ref.ref(); +} + +/*! + \since 4.5 + + Constructs a new QScriptValue with a string \a value. +*/ + +#ifndef QT_NO_CAST_FROM_ASCII +QScriptValue::QScriptValue(const char *value) + : d_ptr(new QScriptValuePrivate) +{ + d_ptr->value.m_type = QScript::LazyStringType; + d_ptr->value.m_lazy_string_value = new QString(QString::fromAscii(value)); + d_ptr->ref.ref(); +} +#endif + +/*! + Assigns the \a other value to this QScriptValue. + + Note that if \a other is an object (isObject() returns true), + only a reference to the underlying object will be assigned; + the object itself will not be copied. +*/ +QScriptValue &QScriptValue::operator=(const QScriptValue &other) +{ + if (d_ptr == other.d_ptr) + return *this; + if (d_ptr && !d_ptr->ref.deref()) { + if (engine()) { + QScriptEnginePrivate::get(engine())->unregisterValue(d_ptr); + } else { + delete d_ptr; + } + } + d_ptr = other.d_ptr; + if (d_ptr) + d_ptr->ref.ref(); + return *this; +} + +/*! + Returns true if this QScriptValue is an object of the Error class; + otherwise returns false. + + \sa QScriptContext::throwError() +*/ +bool QScriptValue::isError() const +{ + Q_D(const QScriptValue); + return d && d->value.isError(); +} + +/*! + Returns true if this QScriptValue is an object of the Array class; + otherwise returns false. + + \sa QScriptEngine::newArray() +*/ +bool QScriptValue::isArray() const +{ + Q_D(const QScriptValue); + return d && d->value.isArray(); +} + +/*! + Returns true if this QScriptValue is an object of the Date class; + otherwise returns false. + + \sa QScriptEngine::newDate() +*/ +bool QScriptValue::isDate() const +{ + Q_D(const QScriptValue); + return d && d->value.isDate(); +} + +/*! + Returns true if this QScriptValue is an object of the RegExp class; + otherwise returns false. + + \sa QScriptEngine::newRegExp() +*/ +bool QScriptValue::isRegExp() const +{ + Q_D(const QScriptValue); + return d && d->value.isRegExp(); +} + +/*! + If this QScriptValue is an object, returns the internal prototype + (\c{__proto__} property) of this object; otherwise returns an + invalid QScriptValue. + + \sa setPrototype(), isObject() +*/ +QScriptValue QScriptValue::prototype() const +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.prototype()); +} + +/*! + If this QScriptValue is an object, sets the internal prototype + (\c{__proto__} property) of this object to be \a prototype; + otherwise does nothing. + + The internal prototype should not be confused with the public + property with name "prototype"; the public prototype is usually + only set on functions that act as constructors. + + \sa prototype(), isObject() +*/ +void QScriptValue::setPrototype(const QScriptValue &prototype) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return; + if (prototype.isValid() && prototype.engine() + && (prototype.engine() != engine())) { + qWarning("QScriptValue::setPrototype() failed: " + "cannot set a prototype created in " + "a different engine"); + return; + } + QScriptValueImpl was = d->value.prototype(); + d->value.setPrototype(d->value.engine()->toImpl(prototype)); + if (d->value.detectedCycle()) { + qWarning("QScriptValue::setPrototype() failed: " + "cyclic prototype value"); + d->value.setPrototype(was); + } +} + +/*! + Returns the scope object of this QScriptValue. This function is only + relevant for function objects. The scope determines how variables are + resolved when the function is invoked. +*/ +QScriptValue QScriptValue::scope() const +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.scope()); +} + +/*! + Sets the \a scope object of this QScriptValue. This function is only + relevant for function objects. Changing the scope is useful when creating + closures; see \l{Nested Functions and the Scope Chain}. +*/ +void QScriptValue::setScope(const QScriptValue &scope) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return; + if (scope.isValid() && scope.engine() + && (scope.engine() != engine())) { + qWarning("QScriptValue::setScope() failed: " + "cannot set a scope object created in " + "a different engine"); + return; + } + d->value.setScope(d->value.engine()->toImpl(scope)); +} + +/*! + Returns true if this QScriptValue is an instance of + \a other; otherwise returns false. + + This QScriptValue is considered to be an instance of \a other if + \a other is a function and the value of the \c{prototype} + property of \a other is in the prototype chain of this + QScriptValue. +*/ +bool QScriptValue::instanceOf(const QScriptValue &other) const +{ + Q_D(const QScriptValue); + if (!isObject() || !other.isObject()) + return false; + if (other.engine() != engine()) { + qWarning("QScriptValue::instanceof: " + "cannot perform operation on a value created in " + "a different engine"); + return false; + } + return d->value.engine()->toImpl(*this) + .instanceOf(d->value.engine()->toImpl(other)); +} + +/*! + Returns true if this QScriptValue is less than \a other, otherwise + returns false. The comparison follows the behavior described in + \l{ECMA-262} section 11.8.5, "The Abstract Relational Comparison + Algorithm". + + Note that if this QScriptValue or the \a other value are objects, + calling this function has side effects on the script engine, since + the engine will call the object's valueOf() function (and possibly + toString()) in an attempt to convert the object to a primitive value + (possibly resulting in an uncaught script exception). + + \sa equals() +*/ +bool QScriptValue::lessThan(const QScriptValue &other) const +{ + if (!isValid() || !other.isValid()) + return false; + if (other.engine() && engine() && (other.engine() != engine())) { + qWarning("QScriptValue::lessThan: " + "cannot compare to a value created in " + "a different engine"); + return false; + } + return QScriptEnginePrivate::lessThan(QScriptValuePrivate::valueOf(*this), + QScriptValuePrivate::valueOf(other)); +} + +/*! + Returns true if this QScriptValue is equal to \a other, otherwise + returns false. The comparison follows the behavior described in + \l{ECMA-262} section 11.9.3, "The Abstract Equality Comparison + Algorithm". + + This function can return true even if the type of this QScriptValue + is different from the type of the \a other value; i.e. the + comparison is not strict. For example, comparing the number 9 to + the string "9" returns true; comparing an undefined value to a null + value returns true; comparing a \c{Number} object whose primitive + value is 6 to a \c{String} object whose primitive value is "6" + returns true; and comparing the number 1 to the boolean value + \c{true} returns true. If you want to perform a comparison + without such implicit value conversion, use strictlyEquals(). + + Note that if this QScriptValue or the \a other value are objects, + calling this function has side effects on the script engine, since + the engine will call the object's valueOf() function (and possibly + toString()) in an attempt to convert the object to a primitive value + (possibly resulting in an uncaught script exception). + + \sa strictlyEquals(), lessThan() +*/ +bool QScriptValue::equals(const QScriptValue &other) const +{ + if (!isValid() || !other.isValid()) + return isValid() == other.isValid(); + if (other.engine() && engine() && (other.engine() != engine())) { + qWarning("QScriptValue::equals: " + "cannot compare to a value created in " + "a different engine"); + return false; + } + return QScriptEnginePrivate::equals(QScriptValuePrivate::valueOf(*this), + QScriptValuePrivate::valueOf(other)); +} + +/*! + Returns true if this QScriptValue is equal to \a other using strict + comparison (no conversion), otherwise returns false. The comparison + follows the behavior described in \l{ECMA-262} section 11.9.6, "The + Strict Equality Comparison Algorithm". + + If the type of this QScriptValue is different from the type of the + \a other value, this function returns false. If the types are equal, + the result depends on the type, as shown in the following table: + + \table + \header \o Type \o Result + \row \o Undefined \o true + \row \o Null \o true + \row \o Boolean \o true if both values are true, false otherwise + \row \o Number \o false if either value is NaN (Not-a-Number); true if values are equal, false otherwise + \row \o String \o true if both values are exactly the same sequence of characters, false otherwise + \row \o Object \o true if both values refer to the same object, false otherwise + \endtable + + \sa equals() +*/ +bool QScriptValue::strictlyEquals(const QScriptValue &other) const +{ + if (!isValid() || !other.isValid()) + return isValid() == other.isValid(); + if (other.engine() && engine() && (other.engine() != engine())) { + qWarning("QScriptValue::strictlyEquals: " + "cannot compare to a value created in " + "a different engine"); + return false; + } + return QScriptEnginePrivate::strictlyEquals(QScriptValuePrivate::valueOf(*this), + QScriptValuePrivate::valueOf(other)); +} + +/*! + Returns the string value of this QScriptValue, as defined in + \l{ECMA-262} section 9.8, "ToString". + + Note that if this QScriptValue is an object, calling this function + has side effects on the script engine, since the engine will call + the object's toString() function (and possibly valueOf()) in an + attempt to convert the object to a primitive value (possibly + resulting in an uncaught script exception). + + \sa isString() +*/ +QString QScriptValue::toString() const +{ + Q_D(const QScriptValue); + if (!d) + return QString(); + return d->value.toString(); +} + +/*! + Returns the number value of this QScriptValue, as defined in + \l{ECMA-262} section 9.3, "ToNumber". + + Note that if this QScriptValue is an object, calling this function + has side effects on the script engine, since the engine will call + the object's valueOf() function (and possibly toString()) in an + attempt to convert the object to a primitive value (possibly + resulting in an uncaught script exception). + + \sa isNumber(), toInteger(), toInt32(), toUInt32(), toUInt16() +*/ +qsreal QScriptValue::toNumber() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.toNumber(); +} + +/*! + \obsolete + + Use toBool() instead. +*/ +bool QScriptValue::toBoolean() const +{ + Q_D(const QScriptValue); + if (!d) + return false; + return d->value.toBoolean(); +} + +/*! + \since 4.5 + + Returns the boolean value of this QScriptValue, using the conversion + rules described in \l{ECMA-262} section 9.2, "ToBoolean". + + Note that if this QScriptValue is an object, calling this function + has side effects on the script engine, since the engine will call + the object's valueOf() function (and possibly toString()) in an + attempt to convert the object to a primitive value (possibly + resulting in an uncaught script exception). + + \sa isBool() +*/ +bool QScriptValue::toBool() const +{ + Q_D(const QScriptValue); + if (!d) + return false; + return d->value.toBoolean(); +} + +/*! + Returns the signed 32-bit integer value of this QScriptValue, using + the conversion rules described in \l{ECMA-262} section 9.5, "ToInt32". + + Note that if this QScriptValue is an object, calling this function + has side effects on the script engine, since the engine will call + the object's valueOf() function (and possibly toString()) in an + attempt to convert the object to a primitive value (possibly + resulting in an uncaught script exception). + + \sa toNumber(), toUInt32() +*/ +qint32 QScriptValue::toInt32() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.toInt32(); +} + +/*! + Returns the unsigned 32-bit integer value of this QScriptValue, using + the conversion rules described in \l{ECMA-262} section 9.6, "ToUint32". + + Note that if this QScriptValue is an object, calling this function + has side effects on the script engine, since the engine will call + the object's valueOf() function (and possibly toString()) in an + attempt to convert the object to a primitive value (possibly + resulting in an uncaught script exception). + + \sa toNumber(), toInt32() +*/ +quint32 QScriptValue::toUInt32() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.toUInt32(); +} + +/*! + Returns the unsigned 16-bit integer value of this QScriptValue, using + the conversion rules described in \l{ECMA-262} section 9.7, "ToUint16". + + Note that if this QScriptValue is an object, calling this function + has side effects on the script engine, since the engine will call + the object's valueOf() function (and possibly toString()) in an + attempt to convert the object to a primitive value (possibly + resulting in an uncaught script exception). + + \sa toNumber() +*/ +quint16 QScriptValue::toUInt16() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.toUInt16(); +} + +/*! + Returns the integer value of this QScriptValue, using the conversion + rules described in \l{ECMA-262} section 9.4, "ToInteger". + + Note that if this QScriptValue is an object, calling this function + has side effects on the script engine, since the engine will call + the object's valueOf() function (and possibly toString()) in an + attempt to convert the object to a primitive value (possibly + resulting in an uncaught script exception). + + \sa toNumber() +*/ +qsreal QScriptValue::toInteger() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.toInteger(); +} + +/*! + Returns the QVariant value of this QScriptValue, if it can be + converted to a QVariant; otherwise returns an invalid QVariant. + The conversion is performed according to the following table: + + \table + \header \o Input Type \o Result + \row \o Undefined \o An invalid QVariant. + \row \o Null \o An invalid QVariant. + \row \o Boolean \o A QVariant containing the value of the boolean. + \row \o Number \o A QVariant containing the value of the number. + \row \o String \o A QVariant containing the value of the string. + \row \o QVariant Object \o The result is the QVariant value of the object (no conversion). + \row \o QObject Object \o A QVariant containing a pointer to the QObject. + \row \o Date Object \o A QVariant containing the date value (toDateTime()). + \row \o RegExp Object \o A QVariant containing the regular expression value (toRegExp()). + \row \o Object \o If the value is primitive, then the result is converted to a QVariant according to the above rules; otherwise, an invalid QVariant is returned. + \endtable + + \sa isVariant() +*/ +QVariant QScriptValue::toVariant() const +{ + Q_D(const QScriptValue); + if (!d) + return QVariant(); + return d->value.toVariant(); +} + +/*! + \obsolete + + This function is obsolete; use QScriptEngine::toObject() instead. +*/ +QScriptValue QScriptValue::toObject() const +{ + Q_D(const QScriptValue); + if (!d) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + if (!eng) + return QScriptValue(); + return eng->toPublic(eng->toObject(d->value)); +} + +/*! + Returns a QDateTime representation of this value, in local time. + If this QScriptValue is not a date, or the value of the date is NaN + (Not-a-Number), an invalid QDateTime is returned. + + \sa isDate() +*/ +QDateTime QScriptValue::toDateTime() const +{ + Q_D(const QScriptValue); + if (!d) + return QDateTime(); + return d->value.toDateTime(); +} + +#ifndef QT_NO_REGEXP +/*! + Returns the QRegExp representation of this value. + If this QScriptValue is not a regular expression, an empty + QRegExp is returned. + + \sa isRegExp() +*/ +QRegExp QScriptValue::toRegExp() const +{ + Q_D(const QScriptValue); + if (!d) + return QRegExp(); + return d->value.toRegExp(); +} +#endif // QT_NO_REGEXP + +/*! + If this QScriptValue is a QObject, returns the QObject pointer + that the QScriptValue represents; otherwise, returns 0. + + If the QObject that this QScriptValue wraps has been deleted, + this function returns 0 (i.e. it is possible for toQObject() + to return 0 even when isQObject() returns true). + + \sa isQObject() +*/ +QObject *QScriptValue::toQObject() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.toQObject(); +} + +/*! + If this QScriptValue is a QMetaObject, returns the QMetaObject pointer + that the QScriptValue represents; otherwise, returns 0. + + \sa isQMetaObject() +*/ +const QMetaObject *QScriptValue::toQMetaObject() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.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) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return; + if (value.engine() && (value.engine() != engine())) { + qWarning("QScriptValue::setProperty(%s) failed: " + "cannot set value created in a different engine", + qPrintable(name)); + return; + } + d->value.setProperty(name, d->value.engine()->toImpl(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(), QScriptValueIterator +*/ +QScriptValue QScriptValue::property(const QString &name, + const ResolveFlags &mode) const +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.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 +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.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) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return; + if (value.engine() && (value.engine() != engine())) { + qWarning("QScriptValue::setProperty() failed: " + "cannot set value created in a different engine"); + return; + } + d->value.setProperty(arrayIndex, d->value.engine()->toImpl(value), flags); +} + +/*! + \since 4.4 + + Returns the value of this QScriptValue's property with the given \a name, + using the given \a mode to resolve the property. + + This overload of property() is useful when you need to look up the + same property repeatedly, since the lookup can be performed faster + when the name is represented as an interned string. + + \sa QScriptEngine::toStringHandle(), setProperty() +*/ +QScriptValue QScriptValue::property(const QScriptString &name, + const ResolveFlags &mode) const +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + if (!name.isValid()) + return QScriptValue(); + QScriptStringPrivate *s = QScriptStringPrivate::get(name); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.property(s->nameId, mode)); +} + +/*! + \since 4.4 + + Sets the value of this QScriptValue's property with the given \a + name to the given \a value. The given \a flags specify how this + property may be accessed by script code. + + This overload of setProperty() is useful when you need to set the + same property repeatedly, since the operation can be performed + faster when the name is represented as an interned string. + + \sa QScriptEngine::toStringHandle() +*/ +void QScriptValue::setProperty(const QScriptString &name, + const QScriptValue &value, + const PropertyFlags &flags) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject() || !name.isValid()) + return; + if (value.engine() && (value.engine() != engine())) { + qWarning("QScriptValue::setProperty() failed: " + "cannot set value created in a different engine"); + return; + } + QScriptStringPrivate *s = QScriptStringPrivate::get(name); + d->value.setProperty(s->nameId, d->value.engine()->toImpl(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 +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->value.propertyFlags(name, mode); +} + +/*! + \since 4.4 + + 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 QScriptString &name, + const ResolveFlags &mode) const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + if (!name.isValid()) + return 0; + QScriptStringPrivate *s = QScriptStringPrivate::get(name); + return d->value.propertyFlags(s->nameId, 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. + + \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 2 + + \sa construct() +*/ +QScriptValue QScriptValue::call(const QScriptValue &thisObject, + const QScriptValueList &args) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + if (isFunction() && thisObject.isValid() && thisObject.engine() && + engine() && (thisObject.engine() != engine())) { + qWarning("QScriptValue::call() failed: " + "cannot call function with thisObject created in " + "a different engine"); + return QScriptValue(); + } + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.call(eng->toImpl(thisObject), + eng->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. + + One common usage of this function is to forward native function + calls to another function: + + \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 3 + + \sa construct(), QScriptContext::argumentsObject() +*/ +QScriptValue QScriptValue::call(const QScriptValue &thisObject, + const QScriptValue &arguments) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + if (isFunction() && thisObject.isValid() && thisObject.engine() + && (thisObject.engine() != engine())) { + qWarning("QScriptValue::call() failed: " + "cannot call function with thisObject created in " + "a different engine"); + return QScriptValue(); + } + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.call(eng->toImpl(thisObject), + eng->toImpl(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 default constructed object is returned. + + If this QScriptValue is not a function, construct() does nothing + and returns an invalid QScriptValue. + + 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) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.construct(eng->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 default constructed 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) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.construct(eng->toImpl(arguments))); +} + +/*! + Returns the QScriptEngine that created this QScriptValue, + or 0 if this QScriptValue is invalid or the value is not + associated with a particular engine. +*/ +QScriptEngine *QScriptValue::engine() const +{ + Q_D(const QScriptValue); + if (!d) + return 0; + return d->engine; +} + +/*! + \obsolete + + Use isBool() instead. +*/ +bool QScriptValue::isBoolean() const +{ + Q_D(const QScriptValue); + return d && d->value.isBoolean(); +} + +/*! + \since 4.5 + + Returns true if this QScriptValue is of the primitive type Boolean; + otherwise returns false. + + \sa toBool() +*/ +bool QScriptValue::isBool() const +{ + Q_D(const QScriptValue); + return d && d->value.isBoolean(); +} + +/*! + Returns true if this QScriptValue is of the primitive type Number; + otherwise returns false. + + \sa toNumber() +*/ +bool QScriptValue::isNumber() const +{ + Q_D(const QScriptValue); + return d && d->value.isNumber(); +} + +/*! + Returns true if this QScriptValue is of the primitive type String; + otherwise returns false. + + \sa toString() +*/ +bool QScriptValue::isString() const +{ + Q_D(const QScriptValue); + return d && d->value.isString(); +} + +/*! + Returns true if this QScriptValue is a function; otherwise returns + false. + + \sa call() +*/ +bool QScriptValue::isFunction() const +{ + Q_D(const QScriptValue); + return d && d->value.isFunction(); +} + +/*! + Returns true if this QScriptValue is of the primitive type Null; + otherwise returns false. + + \sa QScriptEngine::nullValue() +*/ +bool QScriptValue::isNull() const +{ + Q_D(const QScriptValue); + return d && d->value.isNull(); +} + +/*! + Returns true if this QScriptValue is of the primitive type Undefined; + otherwise returns false. + + \sa QScriptEngine::undefinedValue() +*/ +bool QScriptValue::isUndefined() const +{ + Q_D(const QScriptValue); + return d && d->value.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 +{ + Q_D(const QScriptValue); + return d && d->value.isObject(); +} + +/*! + Returns true if this QScriptValue is a variant value; + otherwise returns false. + + \sa toVariant(), QScriptEngine::newVariant() +*/ +bool QScriptValue::isVariant() const +{ + Q_D(const QScriptValue); + return d && d->value.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 +{ + Q_D(const QScriptValue); + return d && d->value.isQObject(); +} + +/*! + Returns true if this QScriptValue is a QMetaObject; otherwise returns + false. + + \sa toQMetaObject(), QScriptEngine::newQMetaObject() +*/ +bool QScriptValue::isQMetaObject() const +{ + Q_D(const QScriptValue); + return d && d->value.isQMetaObject(); +} + +/*! + Returns true if this QScriptValue is valid; otherwise returns + false. +*/ +bool QScriptValue::isValid() const +{ + Q_D(const QScriptValue); + return d && d->value.isValid(); +} + +/*! + \since 4.4 + + Returns the internal data of this QScriptValue object. QtScript uses + this property to store the primitive value of Date, String, Number + and Boolean objects. For other types of object, custom data may be + stored using setData(). +*/ +QScriptValue QScriptValue::data() const +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return QScriptValue(); + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + return eng->toPublic(d->value.internalValue()); +} + +/*! + \since 4.4 + + Sets the internal \a data of this QScriptValue object. You can use + this function to set object-specific data that won't be directly + accessible to scripts, but may be retrieved in C++ using the data() + function. +*/ +void QScriptValue::setData(const QScriptValue &data) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return; + QScriptEnginePrivate *eng = QScriptEnginePrivate::get(engine()); + d->value.setInternalValue(eng->toImpl(data)); +} + +/*! + \since 4.4 + + Returns the custom script class that this script object is an + instance of, or 0 if the object is not of a custom class. + + \sa setScriptClass() +*/ +QScriptClass *QScriptValue::scriptClass() const +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return 0; + QScriptClassInfo *info = d->value.classInfo(); + if ((info->type() & QScriptClassInfo::TypeMask) < QScriptClassInfo::CustomType) + return 0; + return QScriptClassPrivate::classFromInfo(info); +} + +/*! + \since 4.4 + + Sets the custom script class of this script object to \a scriptClass. + This can be used to "promote" a plain script object (e.g. created + by the "new" operator in a script, or by QScriptEngine::newObject() in C++) + to an object of a custom type. + + If \a scriptClass is 0, the object will be demoted to a plain + script object. + + \sa scriptClass(), setData() +*/ +void QScriptValue::setScriptClass(QScriptClass *scriptClass) +{ + Q_D(QScriptValue); + if (!d || !d->value.isObject()) + return; + if (!scriptClass) { + QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(engine()); + d->value.setClassInfo(eng_p->m_class_object); + } else { + QScriptClassPrivate *cls_p = QScriptClassPrivate::get(scriptClass); + d->value.setClassInfo(cls_p->classInfo()); + } +} + +/*! + \internal + + Returns the ID of this object, or -1 if this QScriptValue is not an + object. + + \sa QScriptEngine::objectById() +*/ +qint64 QScriptValue::objectId() const +{ + Q_D(const QScriptValue); + if (!d || !d->value.isObject()) + return -1; + return d->value.m_object_value->m_id; +} + +QT_END_NAMESPACE + +#endif // QT_NO_SCRIPT |