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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qqmlmetaobject_p.h"
#include <private/qqmlengine_p.h>
#include <private/qqmlpropertycachemethodarguments_p.h>
QT_BEGIN_NAMESPACE
static bool isNamedEnumeratorInScope(const QMetaObject *resolvedMetaObject, const QByteArray &scope,
const QByteArray &name)
{
for (int i = resolvedMetaObject->enumeratorCount() - 1; i >= 0; --i) {
QMetaEnum m = resolvedMetaObject->enumerator(i);
if ((m.name() == name) && (scope.isEmpty() || (m.scope() == scope)))
return true;
}
return false;
}
static bool isNamedEnumerator(const QMetaObject *metaObj, const QByteArray &scopedName)
{
QByteArray scope;
QByteArray name;
int scopeIdx = scopedName.lastIndexOf("::");
if (scopeIdx != -1) {
scope = scopedName.left(scopeIdx);
name = scopedName.mid(scopeIdx + 2);
} else {
name = scopedName;
}
if (scope == "Qt")
return isNamedEnumeratorInScope(&Qt::staticMetaObject, scope, name);
if (isNamedEnumeratorInScope(metaObj, scope, name))
return true;
if (metaObj->d.relatedMetaObjects && !scope.isEmpty()) {
for (auto related = metaObj->d.relatedMetaObjects; *related; ++related) {
if (isNamedEnumeratorInScope(*related, scope, name))
return true;
}
}
return false;
}
// Returns true if \a from is assignable to a property of type \a to
bool QQmlMetaObject::canConvert(const QQmlMetaObject &from, const QQmlMetaObject &to)
{
Q_ASSERT(!from.isNull() && !to.isNull());
auto equal = [] (const QMetaObject *lhs, const QMetaObject *rhs) -> bool {
return lhs == rhs || (lhs && rhs && lhs->d.stringdata == rhs->d.stringdata);
};
const QMetaObject *tom = to.metaObject();
if (tom == &QObject::staticMetaObject) return true;
const QMetaObject *fromm = from.metaObject();
while (fromm) {
if (equal(fromm, tom))
return true;
fromm = fromm->superClass();
}
return false;
}
void QQmlMetaObject::resolveGadgetMethodOrPropertyIndex(QMetaObject::Call type, const QMetaObject **metaObject, int *index)
{
int offset;
switch (type) {
case QMetaObject::ReadProperty:
case QMetaObject::WriteProperty:
case QMetaObject::ResetProperty:
offset = (*metaObject)->propertyOffset();
while (*index < offset) {
*metaObject = (*metaObject)->superClass();
offset = (*metaObject)->propertyOffset();
}
break;
case QMetaObject::InvokeMetaMethod:
offset = (*metaObject)->methodOffset();
while (*index < offset) {
*metaObject = (*metaObject)->superClass();
offset = (*metaObject)->methodOffset();
}
break;
default:
offset = 0;
Q_UNIMPLEMENTED();
offset = INT_MAX;
}
*index -= offset;
}
int QQmlMetaObject::methodReturnType(const QQmlPropertyData &data, QByteArray *unknownTypeError) const
{
Q_ASSERT(_m && data.coreIndex() >= 0);
QMetaType type = data.propType();
const char *propTypeName = nullptr;
if (!type.isValid()) {
// Find the return type name from the method info
QMetaMethod m = _m->method(data.coreIndex());
type = m.returnMetaType();
propTypeName = m.typeName();
}
if (type.sizeOf() <= qsizetype(sizeof(int))) {
if (type.flags() & QMetaType::IsEnumeration)
return QMetaType::Int;
if (isNamedEnumerator(_m, propTypeName))
return QMetaType::Int;
if (!type.isValid()) {
if (unknownTypeError)
*unknownTypeError = propTypeName;
}
} // else we know that it's a known type, as sizeOf(UnknownType) == 0
return type.id();
}
int *QQmlMetaObject::methodParameterTypes(int index, ArgTypeStorage *argStorage,
QByteArray *unknownTypeError) const
{
Q_ASSERT(_m && index >= 0);
QMetaMethod m = _m->method(index);
return methodParameterTypes(m, argStorage, unknownTypeError);
}
int *QQmlMetaObject::constructorParameterTypes(int index, ArgTypeStorage *dummy,
QByteArray *unknownTypeError) const
{
QMetaMethod m = _m->constructor(index);
return methodParameterTypes(m, dummy, unknownTypeError);
}
int *QQmlMetaObject::methodParameterTypes(const QMetaMethod &m, ArgTypeStorage *argStorage,
QByteArray *unknownTypeError) const
{
Q_ASSERT(argStorage);
int argc = m.parameterCount();
argStorage->resize(argc + 1);
argStorage->operator[](0) = argc;
QList<QByteArray> argTypeNames; // Only loaded if needed
for (int ii = 0; ii < argc; ++ii) {
int type = m.parameterType(ii);
if (QMetaType(type).sizeOf() > qsizetype(sizeof(int))) {
// Cannot be passed as int
// We know that it's a known type, as sizeOf(UnknownType) == 0
} else if (QMetaType(type).flags() & QMetaType::IsEnumeration) {
type = QMetaType::Int;
} else {
if (argTypeNames.isEmpty())
argTypeNames = m.parameterTypes();
if (isNamedEnumerator(_m, argTypeNames.at(ii))) {
type = QMetaType::Int;
} else if (type == QMetaType::UnknownType) {
if (unknownTypeError)
*unknownTypeError = argTypeNames.at(ii);
return nullptr;
}
}
argStorage->operator[](ii + 1) = type;
}
return argStorage->data();
}
QT_END_NAMESPACE
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