QDeclarativeExpressionPrivate Class Reference

#include <qdeclarativeexpression_p.h>

Inheritance diagram for QDeclarativeExpressionPrivate:

Public Functions
void	_q_notify ()
virtual void	emitValueChanged ()
void	init (QDeclarativeContextData *, const QString &, QObject *)
void	init (QDeclarativeContextData *, const QScriptValue &, QObject *)
void	init (QDeclarativeContextData *, void *, QDeclarativeRefCount *, QObject *, const QString &, int)
	QDeclarativeExpressionPrivate ()
QScriptValue	scriptValue (QObject *secondaryScope=0, bool *isUndefined=0)
QVariant	value (QObject *secondaryScope=0, bool *isUndefined=0)
	~QDeclarativeExpressionPrivate ()
Public Functions inherited from QObjectPrivate
void	_q_reregisterTimers (void *pointer)
void	addConnection (int signal, Connection *c)
void	cleanConnectionLists ()
void	connectNotify (const char *signal)
void	deleteChildren ()
void	disconnectNotify (const char *signal)
bool	isSender (const QObject *receiver, const char *signal) const
bool	isSignalConnected (uint signalIdx) const
	Returns true if the signal with index signal_index from object sender is connected. More...
void	moveToThread_helper ()
	QObjectPrivate (int version=QObjectPrivateVersion)
QObjectList	receiverList (const char *signal) const
QObjectList	senderList () const
void	setParent_helper (QObject *)
void	setThreadData_helper (QThreadData *currentData, QThreadData *targetData)
int	signalIndex (const char *signalName) const
	Returns the signal index used in the internal connectionLists vector. More...
virtual	~QObjectPrivate ()
Public Functions inherited from QObjectData
virtual	~QObjectData ()=0
Public Functions inherited from QDeclarativeQtScriptExpression
EvaluateFlags	evaluateFlags () const
bool	notifyOnValueChange () const
	QDeclarativeQtScriptExpression ()
void	resetNotifyOnChange ()
QScriptValue	scriptValue (QObject *secondaryScope, bool *isUndefined)
void	setEvaluateFlags (EvaluateFlags flags)
void	setNotifyObject (QObject *, int)
void	setNotifyOnValueChange (bool)
virtual	~QDeclarativeQtScriptExpression ()
Public Functions inherited from QDeclarativeAbstractExpression
QDeclarativeContextData *	context () const
bool	isValid () const
	QDeclarativeAbstractExpression ()
virtual void	refresh ()
void	setContext (QDeclarativeContextData *)
virtual	~QDeclarativeAbstractExpression ()
Public Functions inherited from QDeclarativeDelayedError
bool	addError (QDeclarativeEnginePrivate *)
	QDeclarativeDelayedError ()
void	removeError ()
	~QDeclarativeDelayedError ()

Static Public Functions
static QScriptValue	evalInObjectScope (QDeclarativeContextData *, QObject *, const QString &, const QString &, int, QScriptValue *)
static QScriptValue	evalInObjectScope (QDeclarativeContextData *, QObject *, const QScriptProgram &, QScriptValue *)
static void	exceptionToError (QScriptEngine *, QDeclarativeError &)
static QDeclarativeExpressionPrivate *	get (QDeclarativeExpression *expr)
static QDeclarativeExpression *	get (QDeclarativeExpressionPrivate *expr)
Static Public Functions inherited from QObjectPrivate
static void	clearGuards (QObject *)
static QObjectPrivate *	get (QObject *o)
static void	resetCurrentSender (QObject *receiver, Sender *currentSender, Sender *previousSender)
static Sender *	setCurrentSender (QObject *receiver, Sender *sender)
static void	signalSignature (const QMetaMethod &signal, QVarLengthArray< char > *result)

Public Variables
bool	expressionFunctionValid:1
int	line
QByteArray	name
QString	url
Public Variables inherited from QObjectPrivate
union {
QObject *   currentChildBeingDeleted
QAbstractDeclarativeData *   declarativeData
};
quint32	connectedSignals [2]
QObjectConnectionListVector *	connectionLists
Sender *	currentSender
QList< QPointer< QObject > >	eventFilters
ExtraData *	extraData
QString	objectName
Connection *	senders
QAtomicPointer< QtSharedPointer::ExternalRefCountData >	sharedRefcount
QThreadData *	threadData
void *	unused
Public Variables inherited from QObjectData
uint	blockSig: 1
QObjectList	children
uint	hasGuards: 1
uint	inEventHandler: 1
uint	inThreadChangeEvent: 1
uint	isWidget: 1
QMetaObject *	metaObject
uint	ownObjectName: 1
QObject *	parent
uint	pendTimer: 1
int	postedEvents
QObject *	q_ptr
uint	receiveChildEvents: 1
uint	sendChildEvents: 1
uint	unused: 22
uint	wasDeleted: 1
Public Variables inherited from QDeclarativeQtScriptExpression
QDeclarativeRefCount *	dataRef
QString	expression
QScriptValue	expressionContext
QScriptValue	expressionFunction
Mode	expressionFunctionMode
QObject *	scopeObject
Public Variables inherited from QDeclarativeDelayedError
QDeclarativeError	error

Additional Inherited Members
Public Types inherited from QObjectPrivate
typedef void(*	StaticMetaCallFunction) (QObject *, QMetaObject::Call, int, void **)
Public Types inherited from QDeclarativeQtScriptExpression
enum	EvaluateFlag { RequiresThisObject = 0x01 }
enum	Mode { SharedContext, ExplicitContext }

Detailed Description

Definition at line 175 of file qdeclarativeexpression_p.h.

Constructors and Destructors

QDeclarativeExpressionPrivate()

QDeclarativeExpressionPrivate::QDeclarativeExpressionPrivate

(

)

Definition at line 87 of file qdeclarativeexpression.cpp.

: expressionFunctionValid(true), line(-1)
{
}

~QDeclarativeExpressionPrivate()

QDeclarativeExpressionPrivate::~QDeclarativeExpressionPrivate

(

)

Definition at line 92 of file qdeclarativeexpression.cpp.

{
}

Functions

_q_notify()

void QDeclarativeExpressionPrivate::_q_notify

(

)

Warning

This function is not part of the public interface.

Definition at line 801 of file qdeclarativeexpression.cpp.

{
    emitValueChanged();
}

emitValueChanged()

void QDeclarativeExpressionPrivate::emitValueChanged ( )

virtual

Reimplemented in QDeclarativeBindingPrivate.

Definition at line 824 of file qdeclarativeexpression.cpp.

{
    Q_Q(QDeclarativeExpression);
    emit q->valueChanged();
}

evalInObjectScope() [1/2]

QScriptValue QDeclarativeExpressionPrivate::evalInObjectScope ( QDeclarativeContextData *  context, QObject *  object, const QString &  program, const QString &  fileName, int  lineNumber, QScriptValue *  contextObject  )

static

Definition at line 174 of file qdeclarativeexpression.cpp.

Referenced by init(), QDeclarativeVMEMetaObject::method(), and QDeclarativeEngineDebugService::setMethodBody().

{
    QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(context->engine);
    QScriptContext *scriptContext = QScriptDeclarativeClass::pushCleanContext(&ep->scriptEngine);
    if (contextObject) {
        *contextObject = ep->contextClass->newContext(context, object);
        scriptContext->pushScope(*contextObject);
    } else {
        scriptContext->pushScope(ep->contextClass->newContext(context, object));
    }
    scriptContext->pushScope(ep->globalClass->staticGlobalObject());
    QScriptValue rv = ep->scriptEngine.evaluate(program, fileName, lineNumber);
    ep->scriptEngine.popContext();
    return rv;
}

evalInObjectScope() [2/2]

QScriptValue QDeclarativeExpressionPrivate::evalInObjectScope ( QDeclarativeContextData *  context, QObject *  object, const QScriptProgram &  program, QScriptValue *  contextObject  )

static

Definition at line 192 of file qdeclarativeexpression.cpp.

{
    QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(context->engine);
    QScriptContext *scriptContext = QScriptDeclarativeClass::pushCleanContext(&ep->scriptEngine);
    if (contextObject) {
        *contextObject = ep->contextClass->newContext(context, object);
        scriptContext->pushScope(*contextObject);
    } else {
        scriptContext->pushScope(ep->contextClass->newContext(context, object));
    }
    scriptContext->pushScope(ep->globalClass->staticGlobalObject());
    QScriptValue rv = ep->scriptEngine.evaluate(program);
    ep->scriptEngine.popContext();
    return rv;
}

exceptionToError()

void QDeclarativeExpressionPrivate::exceptionToError ( QScriptEngine *  scriptEngine, QDeclarativeError &  error  )

static

Definition at line 386 of file qdeclarativeexpression.cpp.

Referenced by QDeclarativeContextData::addImportedScript(), QDeclarativeQtScriptExpression::eval(), QDeclarativeXMLHttpRequest::printError(), and QDeclarativeWorkerScriptEnginePrivate::reportScriptException().

{
    if (scriptEngine->hasUncaughtException() && 
        scriptEngine->uncaughtException().isError()) {

        QString fileName;
        int lineNumber = scriptEngine->uncaughtExceptionLineNumber();

        QScriptValue exception = scriptEngine->uncaughtException();
        QLatin1String fileNameProp("fileName");

        if (!exception.property(fileNameProp).toString().isEmpty()){
            fileName = exception.property(fileNameProp).toString();
        } else {
            fileName = QLatin1String("<Unknown File>");
        }

        error.setUrl(QUrl(fileName));
        error.setLine(lineNumber);
        error.setColumn(-1);
        error.setDescription(exception.toString());
    } else {
        error = QDeclarativeError();
    }
}

get() [1/2]

static QDeclarativeExpressionPrivate* QDeclarativeExpressionPrivate::get ( QDeclarativeExpression *  expr )

inlinestatic

Definition at line 189 of file qdeclarativeexpression_p.h.

Referenced by QDeclarativeBoundSignal::qt_metacall().

                                                                            {
        return static_cast<QDeclarativeExpressionPrivate *>(QObjectPrivate::get(expr));
    }

get() [2/2]

static QDeclarativeExpression* QDeclarativeExpressionPrivate::get ( QDeclarativeExpressionPrivate *  expr )

inlinestatic

Definition at line 192 of file qdeclarativeexpression_p.h.

                                                                            {
        return expr->q_func();
    }

init() [1/3]

void QDeclarativeExpressionPrivate::init	(	QDeclarativeContextData *	ctxt,
		const QString &	expr,
		QObject *	me
	)

Definition at line 96 of file qdeclarativeexpression.cpp.

{
    expression = expr;

    QDeclarativeAbstractExpression::setContext(ctxt);
    scopeObject = me;
    expressionFunctionValid = false;
}

init() [2/3]

void QDeclarativeExpressionPrivate::init	(	QDeclarativeContextData *	ctxt,
		const QScriptValue &	func,
		QObject *	me
	)

Definition at line 106 of file qdeclarativeexpression.cpp.

{
    expression = func.toString();

    QDeclarativeAbstractExpression::setContext(ctxt);
    scopeObject = me;

    expressionFunction = func;
    expressionFunctionMode = ExplicitContext;
    expressionFunctionValid = true;
}

init() [3/3]

void QDeclarativeExpressionPrivate::init	(	QDeclarativeContextData *	ctxt,
		void *	expr,
		QDeclarativeRefCount *	rc,
		QObject *	me,
		const QString &	srcUrl,
		int	lineNumber
	)

Definition at line 119 of file qdeclarativeexpression.cpp.

{
    url = srcUrl;
    line = lineNumber;

    if (dataRef) dataRef->release();
    dataRef = rc;
    if (dataRef) dataRef->addref();

    quint32 *exprData = (quint32 *)expr;
    QDeclarativeCompiledData *dd = (QDeclarativeCompiledData *)rc;

    expression = QString::fromRawData((QChar *)(exprData + 2), exprData[1]);

    int progIdx = *(exprData);
    bool isSharedProgram = progIdx & 0x80000000;
    progIdx &= 0x7FFFFFFF;

    QDeclarativeEngine *engine = ctxt->engine;
    QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);
    QScriptEngine *scriptEngine = QDeclarativeEnginePrivate::getScriptEngine(engine);

    if (isSharedProgram) {

        if (!dd->cachedClosures.at(progIdx)) {
            QScriptContext *scriptContext = QScriptDeclarativeClass::pushCleanContext(scriptEngine);
            scriptContext->pushScope(ep->contextClass->newSharedContext());
            scriptContext->pushScope(ep->globalClass->staticGlobalObject());
            dd->cachedClosures[progIdx] = new QScriptValue(scriptEngine->evaluate(expression, url, line));
            scriptEngine->popContext();
        }

        expressionFunction = *dd->cachedClosures.at(progIdx);
        expressionFunctionMode = SharedContext;
        expressionFunctionValid = true;

    } else {

        if (!dd->cachedPrograms.at(progIdx)) {
            dd->cachedPrograms[progIdx] = new QScriptProgram(expression, url, line);
        }

        expressionFunction = evalInObjectScope(ctxt, me, *dd->cachedPrograms.at(progIdx), 
                                                     &expressionContext);

        expressionFunctionMode = ExplicitContext;
        expressionFunctionValid = true;
    }

    QDeclarativeAbstractExpression::setContext(ctxt);
    scopeObject = me;
}

scriptValue()

QScriptValue QDeclarativeExpressionPrivate::scriptValue	(	QObject *	secondaryScope = 0,
		bool *	isUndefined = 0
	)

Definition at line 631 of file qdeclarativeexpression.cpp.

{
    if (!expressionFunctionValid) {
        QDeclarativeEngine *engine = context()->engine;
        QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);

        QScriptEngine *scriptEngine = QDeclarativeEnginePrivate::getScriptEngine(engine);

        QScriptContext *scriptContext = QScriptDeclarativeClass::pushCleanContext(scriptEngine);
        expressionContext = ep->contextClass->newContext(context(), scopeObject);
        scriptContext->pushScope(expressionContext);
        scriptContext->pushScope(ep->globalClass->staticGlobalObject());

        QDeclarativeRewrite::RewriteBinding rewriteBinding;
        rewriteBinding.setName(name);
        bool ok = true;
        const QString code = rewriteBinding(expression, &ok);
        if (ok) 
            expressionFunction = scriptEngine->evaluate(code, url, line);

        scriptEngine->popContext();
        expressionFunctionMode = ExplicitContext;
        expressionFunctionValid = true;
    }

    return QDeclarativeQtScriptExpression::scriptValue(secondaryScope, isUndefined);
}

value()

QVariant QDeclarativeExpressionPrivate::value	(	QObject *	secondaryScope = 0,
		bool *	isUndefined = 0
	)

Definition at line 659 of file qdeclarativeexpression.cpp.

Referenced by QDeclarativeBoundSignal::qt_metacall().

{
    Q_Q(QDeclarativeExpression);

    if (!context() || !context()->isValid()) {
        qWarning("QDeclarativeExpression: Attempted to evaluate an expression in an invalid context");
        return QVariant();
    }

    QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(q->engine());

    return ep->scriptValueToVariant(scriptValue(secondaryScope, isUndefined), qMetaTypeId<QList<QObject*> >());
}

Properties

expressionFunctionValid

bool QDeclarativeExpressionPrivate::expressionFunctionValid

Definition at line 205 of file qdeclarativeexpression_p.h.

Referenced by init().

line

int QDeclarativeExpressionPrivate::line

Definition at line 208 of file qdeclarativeexpression_p.h.

Referenced by init().

name

QByteArray QDeclarativeExpressionPrivate::name

Definition at line 209 of file qdeclarativeexpression_p.h.

url

QString QDeclarativeExpressionPrivate::url

Definition at line 207 of file qdeclarativeexpression_p.h.

Referenced by init().

---

The documentation for this class was generated from the following files:

• /src/declarative/qml/qdeclarativeexpression_p.h
• /src/declarative/qml/qdeclarativeexpression.cpp