diff options
| author | Kent Hansen <kent.hansen@nokia.com> | 2012-03-15 10:15:53 +0100 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-03-20 06:49:30 +0100 |
| commit | d96d89c63c28f81f9c17666ed66222f523571f03 (patch) | |
| tree | 085e7cbd6fe9f134d46ad00433907ed7abc35893 /src/qml/qml/v8 | |
| parent | d38e9e413ce0c9ee636ea0b4aa722668ad54d1ae (diff) | |
Make QVariant conversion for JS null type symmetric
If you pass (void*)0 to QJSEngine::toScriptValue(), or you pass a
QVariant of type QMetaType::VoidStar containing a 0 value, you get
back a QJSValue of type null (isNull() returns true); that's fine.
However, if you called QJSValue::toVariant() on a JS null value, you
would get back an invalid QVariant. The expected result is a
QVariant of type QMetaType::VoidStar containing a 0 value. This
makes the conversion of the JS null type symmetric and avoids loss
of data.
Change-Id: Ifa6e788152118f80adf9c2d7be1283f053b44294
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@nokia.com>
Reviewed-by: Simon Hausmann <simon.hausmann@nokia.com>
Diffstat (limited to 'src/qml/qml/v8')
| -rw-r--r-- | src/qml/qml/v8/qjsvalue.cpp | 2 | ||||
| -rw-r--r-- | src/qml/qml/v8/qjsvalue_impl_p.h | 2 | ||||
| -rw-r--r-- | src/qml/qml/v8/qv8engine.cpp | 7 |
3 files changed, 7 insertions, 4 deletions
diff --git a/src/qml/qml/v8/qjsvalue.cpp b/src/qml/qml/v8/qjsvalue.cpp index 4471e68a61..6ecb97d2e5 100644 --- a/src/qml/qml/v8/qjsvalue.cpp +++ b/src/qml/qml/v8/qjsvalue.cpp @@ -428,7 +428,7 @@ quint32 QJSValue::toUInt() const \table \header \li Input Type \li Result \row \li Undefined \li An invalid QVariant. - \row \li Null \li An invalid QVariant. + \row \li Null \li A QVariant containing a null pointer (QMetaType::VoidStar). \row \li Boolean \li A QVariant containing the value of the boolean. \row \li Number \li A QVariant containing the value of the number. \row \li String \li A QVariant containing the value of the string. diff --git a/src/qml/qml/v8/qjsvalue_impl_p.h b/src/qml/qml/v8/qjsvalue_impl_p.h index fbddcfa5ba..8d22204843 100644 --- a/src/qml/qml/v8/qjsvalue_impl_p.h +++ b/src/qml/qml/v8/qjsvalue_impl_p.h @@ -281,7 +281,7 @@ QVariant QJSValuePrivate::toVariant() const case CNumber: return QVariant(u.m_number); case CNull: - return QVariant(); + return QVariant(QMetaType::VoidStar, 0); case CUndefined: return QVariant(); case JSValue: diff --git a/src/qml/qml/v8/qv8engine.cpp b/src/qml/qml/v8/qv8engine.cpp index 8e8223fea1..4a340e2498 100644 --- a/src/qml/qml/v8/qv8engine.cpp +++ b/src/qml/qml/v8/qv8engine.cpp @@ -1365,7 +1365,8 @@ v8::Handle<v8::Value> QV8Engine::variantToJS(const QVariant &value) } // Converts a JS value to a QVariant. -// Null, Undefined -> QVariant() (invalid) +// Undefined -> QVariant() (invalid) +// Null -> QVariant((void*)0) // Boolean -> QVariant(bool) // Number -> QVariant(double) // String -> QVariant(QString) @@ -1376,8 +1377,10 @@ v8::Handle<v8::Value> QV8Engine::variantToJS(const QVariant &value) QVariant QV8Engine::variantFromJS(v8::Handle<v8::Value> value) { Q_ASSERT(!value.IsEmpty()); - if (value->IsNull() || value->IsUndefined()) + if (value->IsUndefined()) return QVariant(); + if (value->IsNull()) + return QVariant(QMetaType::VoidStar, 0); if (value->IsBoolean()) return value->ToBoolean()->Value(); if (value->IsInt32()) |