QScript::ClassObjectDelegate Class Reference

#include <qscriptclassobject_p.h>

Inheritance diagram for QScript::ClassObjectDelegate:

Public Functions
	ClassObjectDelegate (QScriptClass *scriptClass)
virtual bool	deleteProperty (QScriptObject *, JSC::ExecState *, const JSC::Identifier &propertyName)
virtual JSC::CallType	getCallData (QScriptObject *, JSC::CallData &)
virtual JSC::ConstructType	getConstructData (QScriptObject *, JSC::ConstructData &)
virtual bool	getOwnPropertyDescriptor (QScriptObject *, JSC::ExecState *, const JSC::Identifier &propertyName, JSC::PropertyDescriptor &)
virtual void	getOwnPropertyNames (QScriptObject *, JSC::ExecState *, JSC::PropertyNameArray &, JSC::EnumerationMode mode=JSC::ExcludeDontEnumProperties)
virtual bool	getOwnPropertySlot (QScriptObject *, JSC::ExecState *, const JSC::Identifier &propertyName, JSC::PropertySlot &)
virtual bool	hasInstance (QScriptObject *, JSC::ExecState *, JSC::JSValue value, JSC::JSValue proto)
virtual void	put (QScriptObject *, JSC::ExecState *exec, const JSC::Identifier &propertyName, JSC::JSValue, JSC::PutPropertySlot &)
QScriptClass *	scriptClass () const
void	setScriptClass (QScriptClass *scriptClass)
virtual Type	type () const
	~ClassObjectDelegate ()
Public Functions inherited from QScriptObjectDelegate
virtual bool	compareToObject (QScriptObject *, JSC::ExecState *, JSC::JSObject *)
virtual void	markChildren (QScriptObject *, JSC::MarkStack &markStack)
	QScriptObjectDelegate ()
virtual	~QScriptObjectDelegate ()

Static Public Functions
static JSC::JSValue JSC_HOST_CALL	call (JSC::ExecState *, JSC::JSObject *, JSC::JSValue, const JSC::ArgList &)
static JSC::JSObject *	construct (JSC::ExecState *, JSC::JSObject *, const JSC::ArgList &)

Properties
QScriptClass *	m_scriptClass

Additional Inherited Members
Public Types inherited from QScriptObjectDelegate
enum	Type { QtObject, Variant, ClassObject, DeclarativeClassObject }

Detailed Description

Definition at line 49 of file qscriptclassobject_p.h.

Constructors and Destructors

ClassObjectDelegate()

QScript::ClassObjectDelegate::ClassObjectDelegate

(

QScriptClass *

scriptClass

)

Definition at line 46 of file qscriptclassobject.cpp.

    : m_scriptClass(scriptClass)
{
}

~ClassObjectDelegate()

QScript::ClassObjectDelegate::~ClassObjectDelegate

(

)

Definition at line 51 of file qscriptclassobject.cpp.

{
}

Functions

call()

JSC::JSValue JSC_HOST_CALL QScript::ClassObjectDelegate::call ( JSC::ExecState *  exec, JSC::JSObject *  callee, JSC::JSValue  thisValue, const JSC::ArgList &  args  )

static

Definition at line 212 of file qscriptclassobject.cpp.

Referenced by getCallData().

{
    if (!callee->inherits(&QScriptObject::info))
        return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");
    QScriptObject *obj = static_cast<QScriptObject*>(callee);
    QScriptObjectDelegate *delegate = obj->delegate();
    if (!delegate || (delegate->type() != QScriptObjectDelegate::ClassObject))
        return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");

    QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();
    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);

    JSC::ExecState *oldFrame = eng_p->currentFrame;
    eng_p->pushContext(exec, thisValue, args, callee);
    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);
    QScriptValue scriptObject = eng_p->scriptValueFromJSCValue(obj);
    QVariant result = scriptClass->extension(QScriptClass::Callable, QVariant::fromValue(ctx));
    eng_p->popContext();
    eng_p->currentFrame = oldFrame;
    return QScriptEnginePrivate::jscValueFromVariant(exec, result);
}

construct()

JSC::JSObject * QScript::ClassObjectDelegate::construct ( JSC::ExecState *  exec, JSC::JSObject *  callee, const JSC::ArgList &  args  )

static

Definition at line 243 of file qscriptclassobject.cpp.

Referenced by getConstructData().

{
    Q_ASSERT(callee->inherits(&QScriptObject::info));
    QScriptObject *obj = static_cast<QScriptObject*>(callee);
    QScriptObjectDelegate *delegate = obj->delegate();
    QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();

    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
    JSC::ExecState *oldFrame = eng_p->currentFrame;
    eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);
    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);

    QScriptValue defaultObject = ctx->thisObject();
    QScriptValue result = qvariant_cast<QScriptValue>(scriptClass->extension(QScriptClass::Callable, QVariant::fromValue(ctx)));
    if (!result.isObject())
        result = defaultObject;
    eng_p->popContext();
    eng_p->currentFrame = oldFrame;
    return JSC::asObject(eng_p->scriptValueToJSCValue(result));
}

deleteProperty()

bool QScript::ClassObjectDelegate::deleteProperty ( QScriptObject *  object, JSC::ExecState *  exec, const JSC::Identifier &  propertyName  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 160 of file qscriptclassobject.cpp.

{
    // ### avoid duplication of put()
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScript::SaveFrameHelper saveFrame(engine, exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
    if (flags & QScriptClass::HandlesWriteAccess) {
        if (m_scriptClass->propertyFlags(scriptObject, scriptName, id) & QScriptValue::Undeletable)
            return false;
        m_scriptClass->setProperty(scriptObject, scriptName, id, QScriptValue());
        return true;
    }
    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName);
}

getCallData()

JSC::CallType QScript::ClassObjectDelegate::getCallData ( QScriptObject *  , JSC::CallData &  callData  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 204 of file qscriptclassobject.cpp.

{
    if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
        return JSC::CallTypeNone;
    callData.native.function = call;
    return JSC::CallTypeHost;
}

getConstructData()

JSC::ConstructType QScript::ClassObjectDelegate::getConstructData ( QScriptObject *  , JSC::ConstructData &  constructData  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 235 of file qscriptclassobject.cpp.

{
    if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
        return JSC::ConstructTypeNone;
    constructData.native.function = construct;
    return JSC::ConstructTypeHost;
}

getOwnPropertyDescriptor()

bool QScript::ClassObjectDelegate::getOwnPropertyDescriptor ( QScriptObject *  object, JSC::ExecState *  exec, const JSC::Identifier &  propertyName, JSC::PropertyDescriptor &  descriptor  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 93 of file qscriptclassobject.cpp.

{
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScript::SaveFrameHelper saveFrame(engine, exec);
    // for compatibility with the old back-end, normal JS properties
    // are queried first.
    if (QScriptObjectDelegate::getOwnPropertyDescriptor(object, exec, propertyName, descriptor))
        return true;

    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags qflags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
    if (qflags & QScriptClass::HandlesReadAccess) {
        QScriptValue::PropertyFlags pflags = m_scriptClass->propertyFlags(scriptObject, scriptName, id);
        unsigned attribs = 0;
        if (pflags & QScriptValue::ReadOnly)
            attribs |= JSC::ReadOnly;
        if (pflags & QScriptValue::SkipInEnumeration)
            attribs |= JSC::DontEnum;
        if (pflags & QScriptValue::Undeletable)
            attribs |= JSC::DontDelete;
        if (pflags & QScriptValue::PropertyGetter)
            attribs |= JSC::Getter;
        if (pflags & QScriptValue::PropertySetter)
            attribs |= JSC::Setter;
        attribs |= pflags & QScriptValue::UserRange;
        // Rather than calling the getter, we could return an access descriptor here.
        QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
        if (!value.isValid()) {
            // The class claims to have the property, but returned an invalid
            // value. Silently convert to undefined to avoid the invalid value
            // "escaping" into JS.
            value = QScriptValue(QScriptValue::UndefinedValue);
        }
        descriptor.setDescriptor(engine->scriptValueToJSCValue(value), attribs);
        return true;
    }
    return false;
}

getOwnPropertyNames()

void QScript::ClassObjectDelegate::getOwnPropertyNames ( QScriptObject *  object, JSC::ExecState *  exec, JSC::PropertyNameArray &  propertyNames, JSC::EnumerationMode  mode = JSC::ExcludeDontEnumProperties  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 182 of file qscriptclassobject.cpp.

{
    // For compatibility with the old back-end, normal JS properties
    // are added first.
    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, mode);

    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScript::SaveFrameHelper saveFrame(engine, exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptClassPropertyIterator *it = m_scriptClass->newIterator(scriptObject);
    if (it != 0) {
        while (it->hasNext()) {
            it->next();
            QString name = it->name().toString();
            propertyNames.add(JSC::Identifier(exec, name));
        }
        delete it;
    }
}

getOwnPropertySlot()

bool QScript::ClassObjectDelegate::getOwnPropertySlot ( QScriptObject *  object, JSC::ExecState *  exec, const JSC::Identifier &  propertyName, JSC::PropertySlot &  slot  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 60 of file qscriptclassobject.cpp.

{
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScript::SaveFrameHelper saveFrame(engine, exec);
    // for compatibility with the old back-end, normal JS properties
    // are queried first.
    if (QScriptObjectDelegate::getOwnPropertySlot(object, exec, propertyName, slot))
        return true;

    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
    if (flags & QScriptClass::HandlesReadAccess) {
        QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
        if (!value.isValid()) {
            // The class claims to have the property, but returned an invalid
            // value. Silently convert to undefined to avoid the invalid value
            // "escaping" into JS.
            value = QScriptValue(QScriptValue::UndefinedValue);
        }
        slot.setValue(engine->scriptValueToJSCValue(value));
        return true;
    }
    return false;
}

hasInstance()

bool QScript::ClassObjectDelegate::hasInstance ( QScriptObject *  object, JSC::ExecState *  exec, JSC::JSValue  value, JSC::JSValue  proto  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 265 of file qscriptclassobject.cpp.

{
    if (!scriptClass()->supportsExtension(QScriptClass::HasInstance))
        return QScriptObjectDelegate::hasInstance(object, exec, value, proto);
    QScriptValueList args;
    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
    QScript::SaveFrameHelper saveFrame(eng_p, exec);
    args << eng_p->scriptValueFromJSCValue(object) << eng_p->scriptValueFromJSCValue(value);
    QVariant result = scriptClass()->extension(QScriptClass::HasInstance, QVariant::fromValue(args));
    return result.toBool();
}

put()

void QScript::ClassObjectDelegate::put ( QScriptObject *  object, JSC::ExecState *  exec, const JSC::Identifier &  propertyName, JSC::JSValue  value, JSC::PutPropertySlot &  slot  )

virtual

Reimplemented from QScriptObjectDelegate.

Definition at line 140 of file qscriptclassobject.cpp.

{
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    QScript::SaveFrameHelper saveFrame(engine, exec);
    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
    QScriptString scriptName;
    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
    QScriptStringPrivate::init(scriptName, &scriptName_d);
    uint id = 0;
    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
        scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
    if (flags & QScriptClass::HandlesWriteAccess) {
        m_scriptClass->setProperty(scriptObject, scriptName, id, engine->scriptValueFromJSCValue(value));
        return;
    }
    QScriptObjectDelegate::put(object, exec, propertyName, value, slot);
}

scriptClass()

QScriptClass * QScript::ClassObjectDelegate::scriptClass ( ) const

inline

Definition at line 89 of file qscriptclassobject_p.h.

Referenced by call(), construct(), hasInstance(), and setScriptClass().

{
    return m_scriptClass;
}

setScriptClass()

void QScript::ClassObjectDelegate::setScriptClass ( QScriptClass *  scriptClass )

inline

Definition at line 94 of file qscriptclassobject_p.h.

{
    Q_ASSERT(scriptClass != 0);
    m_scriptClass = scriptClass;
}

type()

QScriptObjectDelegate::Type QScript::ClassObjectDelegate::type ( ) const

virtual

Implements QScriptObjectDelegate.

Definition at line 55 of file qscriptclassobject.cpp.

{
    return ClassObject;
}

Properties

m_scriptClass

QScriptClass* QScript::ClassObjectDelegate::m_scriptClass

private

Definition at line 86 of file qscriptclassobject_p.h.

Referenced by deleteProperty(), getCallData(), getConstructData(), getOwnPropertyDescriptor(), getOwnPropertyNames(), getOwnPropertySlot(), put(), scriptClass(), and setScriptClass().

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

• /src/script/bridge/qscriptclassobject_p.h
• /src/script/bridge/qscriptclassobject.cpp