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author | Aaron Kennedy <aaron.kennedy@nokia.com> | 2009-07-03 01:21:30 (GMT) |
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committer | Aaron Kennedy <aaron.kennedy@nokia.com> | 2009-07-03 01:21:30 (GMT) |
commit | 67a9e4fe6e35bf517bd2f99540cf88a8e567b0ca (patch) | |
tree | 9bde22afe3289835d2053a7a025c83a403786407 /src/declarative/qml/qmlengine.cpp | |
parent | 1ee2bf9f693799c06f10bd6a02ecc65874fb6622 (diff) | |
download | Qt-67a9e4fe6e35bf517bd2f99540cf88a8e567b0ca.zip Qt-67a9e4fe6e35bf517bd2f99540cf88a8e567b0ca.tar.gz Qt-67a9e4fe6e35bf517bd2f99540cf88a8e567b0ca.tar.bz2 |
Move QmlExpression into its own file
Diffstat (limited to 'src/declarative/qml/qmlengine.cpp')
-rw-r--r-- | src/declarative/qml/qmlengine.cpp | 523 |
1 files changed, 0 insertions, 523 deletions
diff --git a/src/declarative/qml/qmlengine.cpp b/src/declarative/qml/qmlengine.cpp index ad3f4b6..f26e389 100644 --- a/src/declarative/qml/qmlengine.cpp +++ b/src/declarative/qml/qmlengine.cpp @@ -925,457 +925,6 @@ QScriptValue QmlEngine::createQMLObject(QScriptContext *ctxt, QScriptEngine *eng return engine->nullValue(); } -QmlExpressionPrivate::QmlExpressionPrivate(QmlExpression *b) -: q(b), ctxt(0), sseData(0), proxy(0), me(0), trackChange(false), line(-1), id(0), log(0) -{ -} - -QmlExpressionPrivate::QmlExpressionPrivate(QmlExpression *b, void *expr, QmlRefCount *rc) -: q(b), ctxt(0), sse((const char *)expr, rc), sseData(0), proxy(0), me(0), trackChange(true), line(-1), id(0), log(0) -{ -} - -QmlExpressionPrivate::QmlExpressionPrivate(QmlExpression *b, const QString &expr) -: q(b), ctxt(0), expression(expr), sseData(0), proxy(0), me(0), trackChange(true), line(-1), id(0), log(0) -{ -} - -QmlExpressionPrivate::~QmlExpressionPrivate() -{ - sse.deleteScriptState(sseData); - sseData = 0; - delete proxy; - delete log; -} - -/*! - Create an invalid QmlExpression. - - As the expression will not have an associated QmlContext, this will be a - null expression object and its value will always be an invalid QVariant. - */ -QmlExpression::QmlExpression() -: d(new QmlExpressionPrivate(this)) -{ -} - -/*! \internal */ -QmlExpression::QmlExpression(QmlContext *ctxt, void *expr, - QmlRefCount *rc, QObject *me) -: d(new QmlExpressionPrivate(this, expr, rc)) -{ - d->ctxt = ctxt; - if(ctxt && ctxt->engine()) - d->id = ctxt->engine()->d_func()->getUniqueId(); - if(ctxt) - ctxt->d_func()->childExpressions.insert(this); - d->me = me; -} - -/*! - Create a QmlExpression object. - - The \a expression ECMAScript will be executed in the \a ctxt QmlContext. - If specified, the \a scope object's properties will also be in scope during - the expression's execution. -*/ -QmlExpression::QmlExpression(QmlContext *ctxt, const QString &expression, - QObject *scope) -: d(new QmlExpressionPrivate(this, expression)) -{ - d->ctxt = ctxt; - if(ctxt && ctxt->engine()) - d->id = ctxt->engine()->d_func()->getUniqueId(); - if(ctxt) - ctxt->d_func()->childExpressions.insert(this); - d->me = scope; -} - -/*! - Destroy the QmlExpression instance. -*/ -QmlExpression::~QmlExpression() -{ - if (d->ctxt) - d->ctxt->d_func()->childExpressions.remove(this); - delete d; d = 0; -} - -/*! - Returns the QmlEngine this expression is associated with, or 0 if there - is no association or the QmlEngine has been destroyed. -*/ -QmlEngine *QmlExpression::engine() const -{ - return d->ctxt?d->ctxt->engine():0; -} - -/*! - Returns the QmlContext this expression is associated with, or 0 if there - is no association or the QmlContext has been destroyed. -*/ -QmlContext *QmlExpression::context() const -{ - return d->ctxt; -} - -/*! - Returns the expression string. -*/ -QString QmlExpression::expression() const -{ - if (d->sse.isValid()) - return QLatin1String(d->sse.expression()); - else - return d->expression; -} - -/*! - Clear the expression. -*/ -void QmlExpression::clearExpression() -{ - setExpression(QString()); -} - -/*! - Set the expression to \a expression. -*/ -void QmlExpression::setExpression(const QString &expression) -{ - if (d->sseData) { - d->sse.deleteScriptState(d->sseData); - d->sseData = 0; - } - - delete d->proxy; d->proxy = 0; - - d->expression = expression; - - d->sse.clear(); -} - -/*! - Called by QmlExpression each time the expression value changes from the - last time it was evaluated. The expression must have been evaluated at - least once (by calling QmlExpression::value()) before this callback will - be made. - - The default implementation does nothing. -*/ -void QmlExpression::valueChanged() -{ -} - -void BindExpressionProxy::changed() -{ - e->valueChanged(); -} - -/*! - Returns the value of the expression, or an invalid QVariant if the - expression is invalid or has an error. -*/ -QVariant QmlExpression::value() -{ - QVariant rv; - if (!d->ctxt || !engine() || (!d->sse.isValid() && d->expression.isEmpty())) - return rv; - -#ifdef Q_ENABLE_PERFORMANCE_LOG - QFxPerfTimer<QFxPerf::BindValue> perf; -#endif - - QmlBasicScript::CacheState cacheState = QmlBasicScript::Reset; - - QmlEnginePrivate *ep = engine()->d_func(); - QmlExpression *lastCurrentExpression = ep->currentExpression; - ep->currentExpression = this; - if (d->sse.isValid()) { -#ifdef Q_ENABLE_PERFORMANCE_LOG - QFxPerfTimer<QFxPerf::BindValueSSE> perfsse; -#endif - - context()->d_func()->defaultObjects.insert(context()->d_func()->highPriorityCount, d->me); - - if (!d->sseData) - d->sseData = d->sse.newScriptState(); - rv = d->sse.run(context(), d->sseData, &cacheState); - - context()->d_func()->defaultObjects.removeAt(context()->d_func()->highPriorityCount); - } else { -#ifdef Q_ENABLE_PERFORMANCE_LOG - QFxPerfTimer<QFxPerf::BindValueQt> perfqt; -#endif - context()->d_func()->defaultObjects.insert(context()->d_func()->highPriorityCount, d->me); - - QScriptEngine *scriptEngine = engine()->scriptEngine(); - QScriptValueList oldScopeChain = scriptEngine->currentContext()->scopeChain(); - for (int i = 0; i < oldScopeChain.size(); ++i) { - scriptEngine->currentContext()->popScope(); - } - for (int i = context()->d_func()->scopeChain.size() - 1; i > -1; --i) { - scriptEngine->currentContext()->pushScope(context()->d_func()->scopeChain.at(i)); - } - QScriptValue svalue = scriptEngine->evaluate(expression(), d->fileName.toString(), d->line); - if (scriptEngine->hasUncaughtException()) { - if (scriptEngine->uncaughtException().isError()){ - QScriptValue exception = scriptEngine->uncaughtException(); - if (!exception.property(QLatin1String("fileName")).toString().isEmpty()){ - qWarning() << exception.property(QLatin1String("fileName")).toString() - << scriptEngine->uncaughtExceptionLineNumber() - << exception.toString(); - - } else { - qWarning() << exception.toString(); - } - } - } - - context()->d_func()->defaultObjects.removeAt(context()->d_func()->highPriorityCount); - if (svalue.isArray()) { - int length = svalue.property(QLatin1String("length")).toInt32(); - if (length && svalue.property(0).isObject()) { - QList<QObject *> list; - for (int ii = 0; ii < length; ++ii) { - QScriptValue arrayItem = svalue.property(ii); - QObject *d = qvariant_cast<QObject *>(arrayItem.data().toVariant()); - if (d) { - list << d; - } else { - list << 0; - } - } - rv = QVariant::fromValue(list); - } - } else if (svalue.isObject() && - !svalue.isNumber() && - !svalue.isString() && - !svalue.isDate() && - !svalue.isError() && - !svalue.isFunction() && - !svalue.isNull() && - !svalue.isQMetaObject() && - !svalue.isQObject() && - !svalue.isRegExp()) { - QScriptValue objValue = svalue.data(); - if (objValue.isValid()) { - QVariant var = objValue.toVariant(); - if (var.userType() >= (int)QVariant::UserType && - QmlMetaType::isObject(var.userType())) - rv = var; - } - } - if (rv.isNull()) - rv = svalue.toVariant(); - - for (int i = 0; i < context()->d_func()->scopeChain.size(); ++i) { - scriptEngine->currentContext()->popScope(); - } - for (int i = oldScopeChain.size() - 1; i > -1; --i) { - scriptEngine->currentContext()->pushScope(oldScopeChain.at(i)); - } - } - ep->currentExpression = lastCurrentExpression; - - if (cacheState != QmlBasicScript::NoChange) { - if (cacheState != QmlBasicScript::Incremental && d->proxy) { - delete d->proxy; - d->proxy = 0; - } - - if (trackChange() && ep->capturedProperties.count()) { - if (!d->proxy) - d->proxy = new BindExpressionProxy(this); - - static int changedIndex = -1; - if (changedIndex == -1) - changedIndex = BindExpressionProxy::staticMetaObject.indexOfSlot("changed()"); - - if(qmlDebugger()) { - QmlExpressionLog log; - log.setTime(engine()->d_func()->getUniqueId()); - log.setExpression(expression()); - log.setResult(rv); - - for (int ii = 0; ii < ep->capturedProperties.count(); ++ii) { - const QmlEnginePrivate::CapturedProperty &prop = - ep->capturedProperties.at(ii); - - if (prop.notifyIndex != -1) { - QMetaObject::connect(prop.object, prop.notifyIndex, - d->proxy, changedIndex); - } else { - // ### FIXME - //QString warn = QLatin1String("Expression depends on property without a NOTIFY signal: [") + QLatin1String(prop.object->metaObject()->className()) + QLatin1String("].") + prop.name; - //log.addWarning(warn); - } - } - d->addLog(log); - - } else { - for (int ii = 0; ii < ep->capturedProperties.count(); ++ii) { - const QmlEnginePrivate::CapturedProperty &prop = - ep->capturedProperties.at(ii); - - if (prop.notifyIndex != -1) - QMetaObject::connect(prop.object, prop.notifyIndex, - d->proxy, changedIndex); - } - } - } else { - QmlExpressionLog log; - log.setTime(engine()->d_func()->getUniqueId()); - log.setExpression(expression()); - log.setResult(rv); - d->addLog(log); - } - - } else { - if(qmlDebugger()) { - QmlExpressionLog log; - log.setTime(engine()->d_func()->getUniqueId()); - log.setExpression(expression()); - log.setResult(rv); - d->addLog(log); - } - } - - ep->capturedProperties.clear(); - - return rv; -} - -/*! - Returns true if the expression results in a constant value. - QmlExpression::value() must have been invoked at least once before the - return from this method is valid. - */ -bool QmlExpression::isConstant() const -{ - return d->proxy == 0; -} - -/*! - Returns true if the changes are tracked in the expression's value. -*/ -bool QmlExpression::trackChange() const -{ - return d->trackChange; -} - -/*! - Set whether changes are tracked in the expression's value to \a trackChange. - - If true, the QmlExpression will monitor properties involved in the - expression's evaluation, and call QmlExpression::valueChanged() if they have - changed. This allows an application to ensure that any value associated - with the result of the expression remains up to date. - - If false, the QmlExpression will not montitor properties involved in the - expression's evaluation, and QmlExpression::valueChanged() will never be - called. This is more efficient if an application wants a "one off" - evaluation of the expression. - - By default, trackChange is true. -*/ -void QmlExpression::setTrackChange(bool trackChange) -{ - d->trackChange = trackChange; -} - -/*! - Set the location of this expression to \a line of \a fileName. This information - is used by the script engine. -*/ -void QmlExpression::setSourceLocation(const QUrl &fileName, int line) -{ - d->fileName = fileName; - d->line = line; -} - -/*! - Returns the expression's scope object, if provided, otherwise 0. - - In addition to data provided by the expression's QmlContext, the scope - object's properties are also in scope during the expression's evaluation. -*/ -QObject *QmlExpression::scopeObject() const -{ - return d->me; -} - -/*! - \internal -*/ -quint32 QmlExpression::id() const -{ - return d->id; -} - -/*! - \class QmlExpression - \brief The QmlExpression class evaluates ECMAScript in a QML context. -*/ - -/*! - \class QmlExpressionObject - \brief The QmlExpressionObject class extends QmlExpression with signals and slots. - - To remain as lightweight as possible, QmlExpression does not inherit QObject - and consequently cannot use signals or slots. For the cases where this is - more convenient in an application, QmlExpressionObject can be used instead. - - QmlExpressionObject behaves identically to QmlExpression, except that the - QmlExpressionObject::value() method is a slot, and the - QmlExpressionObject::valueChanged() callback is a signal. -*/ -/*! - Create a QmlExpression with the specified \a parent. - - As the expression will not have an associated QmlContext, this will be a - null expression object and its value will always be an invalid QVariant. -*/ -QmlExpressionObject::QmlExpressionObject(QObject *parent) -: QObject(parent) -{ -} - -/*! - Create a QmlExpressionObject with the specified \a parent. - - The \a expression ECMAScript will be executed in the \a ctxt QmlContext. - If specified, the \a scope object's properties will also be in scope during - the expression's execution. -*/ -QmlExpressionObject::QmlExpressionObject(QmlContext *ctxt, const QString &expression, QObject *scope, QObject *parent) -: QObject(parent), QmlExpression(ctxt, expression, scope) -{ -} - -/*! \internal */ -QmlExpressionObject::QmlExpressionObject(QmlContext *ctxt, void *d, QmlRefCount *rc, QObject *me) -: QmlExpression(ctxt, d, rc, me) -{ -} - -/*! - Returns the value of the expression, or an invalid QVariant if the - expression is invalid or has an error. -*/ -QVariant QmlExpressionObject::value() -{ - return QmlExpression::value(); -} - -/*! - \fn void QmlExpressionObject::valueChanged() - - Emitted each time the expression value changes from the last time it was - evaluated. The expression must have been evaluated at least once (by - calling QmlExpressionObject::value()) before this signal will be emitted. -*/ - QmlScriptClass::QmlScriptClass(QmlEngine *bindengine) : QScriptClass(bindengine->scriptEngine()), engine(bindengine) { @@ -1628,76 +1177,4 @@ void QmlObjectScriptClass::setProperty(QScriptValue &object, scriptEngine->currentContext()->setActivationObject(oldact); } -void QmlExpressionPrivate::addLog(const QmlExpressionLog &l) -{ - if (!log) - log = new QList<QmlExpressionLog>(); - log->append(l); -} - -QmlExpressionLog::QmlExpressionLog() -{ -} - -QmlExpressionLog::QmlExpressionLog(const QmlExpressionLog &o) -: m_time(o.m_time), - m_expression(o.m_expression), - m_result(o.m_result), - m_warnings(o.m_warnings) -{ -} - -QmlExpressionLog::~QmlExpressionLog() -{ -} - -QmlExpressionLog &QmlExpressionLog::operator=(const QmlExpressionLog &o) -{ - m_time = o.m_time; - m_expression = o.m_expression; - m_result = o.m_result; - m_warnings = o.m_warnings; - return *this; -} - -void QmlExpressionLog::setTime(quint32 time) -{ - m_time = time; -} - -quint32 QmlExpressionLog::time() const -{ - return m_time; -} - -QString QmlExpressionLog::expression() const -{ - return m_expression; -} - -void QmlExpressionLog::setExpression(const QString &e) -{ - m_expression = e; -} - -QStringList QmlExpressionLog::warnings() const -{ - return m_warnings; -} - -void QmlExpressionLog::addWarning(const QString &w) -{ - m_warnings << w; -} - -QVariant QmlExpressionLog::result() const -{ - return m_result; -} - -void QmlExpressionLog::setResult(const QVariant &r) -{ - m_result = r; -} - QT_END_NAMESPACE |