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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative 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 "qmlcontextscriptclass_p.h"
#include <private/qmlengine_p.h>
#include <private/qmlcontext_p.h>
#include <private/qmltypenamescriptclass_p.h>
QT_BEGIN_NAMESPACE
struct ContextData : public QScriptDeclarativeClass::Object {
ContextData(QmlContext *c, QObject *o) : context(c), scopeObject(o) {}
QGuard<QmlContext> context;
QGuard<QObject> scopeObject;
};
/*
The QmlContextScriptClass handles property access for a QmlContext
via QtScript.
*/
QmlContextScriptClass::QmlContextScriptClass(QmlEngine *bindEngine)
: QScriptDeclarativeClass(QmlEnginePrivate::getScriptEngine(bindEngine)), engine(bindEngine),
lastScopeObject(0), lastContext(0), lastData(0), lastPropertyIndex(-1), lastDefaultObject(-1)
{
}
QmlContextScriptClass::~QmlContextScriptClass()
{
}
QScriptValue QmlContextScriptClass::newContext(QmlContext *context, QObject *scopeObject)
{
QScriptEngine *scriptEngine = QmlEnginePrivate::getScriptEngine(engine);
return newObject(scriptEngine, this, new ContextData(context, scopeObject));
}
QmlContext *QmlContextScriptClass::contextFromValue(const QScriptValue &v)
{
if (scriptClass(v) != this)
return 0;
ContextData *data = (ContextData *)object(v);
return data->context;
}
QScriptClass::QueryFlags
QmlContextScriptClass::queryProperty(Object *object, const Identifier &name,
QScriptClass::QueryFlags flags)
{
Q_UNUSED(flags);
lastScopeObject = 0;
lastContext = 0;
lastData = 0;
lastPropertyIndex = -1;
lastDefaultObject = -1;
QmlContext *bindContext = ((ContextData *)object)->context.data();
QObject *scopeObject = ((ContextData *)object)->scopeObject.data();
if (!bindContext)
return 0;
bool includeTypes = true;
while (bindContext) {
QScriptClass::QueryFlags rv =
queryProperty(bindContext, scopeObject, name, flags, includeTypes);
scopeObject = 0; // Only applies to the first context
includeTypes = false; // Only applies to the first context
if (rv) return rv;
bindContext = bindContext->parentContext();
}
return 0;
}
QScriptClass::QueryFlags
QmlContextScriptClass::queryProperty(QmlContext *bindContext, QObject *scopeObject,
const Identifier &name,
QScriptClass::QueryFlags flags,
bool includeTypes)
{
QmlEnginePrivate *ep = QmlEnginePrivate::get(engine);
QmlContextPrivate *cp = QmlContextPrivate::get(bindContext);
lastPropertyIndex = cp->propertyNames?cp->propertyNames->value(name):-1;
if (lastPropertyIndex != -1) {
lastContext = bindContext;
return QScriptClass::HandlesReadAccess;
}
if (includeTypes && cp->imports) {
QmlTypeNameCache::Data *data = cp->imports->data(name);
if (data) {
lastData = data;
lastContext = bindContext;
return QScriptClass::HandlesReadAccess;
}
}
for (int ii = 0; ii < cp->scripts.count(); ++ii) {
lastFunction = QScriptDeclarativeClass::function(cp->scripts.at(ii), name);
if (lastFunction.isValid()) {
lastContext = bindContext;
return QScriptClass::HandlesReadAccess;
}
}
if (scopeObject) {
QScriptClass::QueryFlags rv =
ep->objectClass->queryProperty(scopeObject, name, flags, bindContext);
if (rv) {
lastScopeObject = scopeObject;
lastContext = bindContext;
return rv;
}
}
for (int ii = cp->defaultObjects.count() - 1; ii >= 0; --ii) {
QScriptClass::QueryFlags rv =
ep->objectClass->queryProperty(cp->defaultObjects.at(ii), name, flags, bindContext);
if (rv) {
lastDefaultObject = ii;
lastContext = bindContext;
return rv;
}
}
return 0;
}
QScriptValue QmlContextScriptClass::property(Object *object, const Identifier &name)
{
Q_UNUSED(object);
QmlContext *bindContext = lastContext;
Q_ASSERT(bindContext);
QmlEnginePrivate *ep = QmlEnginePrivate::get(engine);
QmlContextPrivate *cp = QmlContextPrivate::get(bindContext);
if (lastScopeObject) {
return ep->objectClass->property(lastScopeObject, name);
} else if (lastData) {
if (lastData->type)
return ep->typeNameClass->newObject(cp->defaultObjects.at(0), lastData->type);
else
return ep->typeNameClass->newObject(cp->defaultObjects.at(0), lastData->typeNamespace);
} else if (lastPropertyIndex != -1) {
QScriptValue rv;
if (lastPropertyIndex < cp->idValueCount) {
rv = ep->objectClass->newQObject(cp->idValues[lastPropertyIndex].data());
} else {
QVariant value = cp->propertyValues.at(lastPropertyIndex);
rv = ep->scriptValueFromVariant(value);
}
ep->capturedProperties <<
QmlEnginePrivate::CapturedProperty(bindContext, -1, lastPropertyIndex + cp->notifyIndex);
return rv;
} else if(lastDefaultObject != -1) {
// Default object property
return ep->objectClass->property(cp->defaultObjects.at(lastDefaultObject), name);
} else {
return lastFunction;
}
}
void QmlContextScriptClass::setProperty(Object *object, const Identifier &name,
const QScriptValue &value)
{
Q_ASSERT(lastScopeObject || lastDefaultObject != -1);
QmlContext *bindContext = lastContext;
Q_ASSERT(bindContext);
QmlEnginePrivate *ep = QmlEnginePrivate::get(engine);
QmlContextPrivate *cp = QmlContextPrivate::get(bindContext);
if (lastScopeObject) {
ep->objectClass->setProperty(lastScopeObject, name, value, bindContext);
} else {
ep->objectClass->setProperty(cp->defaultObjects.at(lastDefaultObject), name, value,
bindContext);
}
}
QT_END_NAMESPACE
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