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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qqmlcppbinding_p.h"
#include <QtQml/qqmlengine.h>
#include <QtQml/qqmlcontext.h>
#include <QtCore/qmetaobject.h>
#include <private/qqmltypedata_p.h>
#include <private/qqmlpropertybinding_p.h>
#include <private/qqmlbinding_p.h>
#include <private/qv4qmlcontext_p.h>
#include <private/qqmlproperty_p.h>
#include <private/qqmlbinding_p.h>
QT_BEGIN_NAMESPACE
template<typename CreateBinding>
inline decltype(auto) createBindingInScope(QObject *thisObject, CreateBinding create)
{
QQmlEngine *qmlengine = qmlEngine(thisObject);
Q_ASSERT(qmlengine);
QV4::ExecutionEngine *v4 = qmlengine->handle();
Q_ASSERT(v4);
QQmlData *ddata = QQmlData::get(thisObject);
Q_ASSERT(ddata && ddata->outerContext);
QQmlRefPointer<QQmlContextData> ctxtdata = QQmlRefPointer<QQmlContextData>(ddata->outerContext);
QV4::Scope scope(v4);
QV4::ExecutionContext *executionCtx = v4->scriptContext();
QV4::Scoped<QV4::QmlContext> qmlContext(
scope, QV4::QmlContext::create(executionCtx, ctxtdata, thisObject));
return create(ctxtdata, qmlContext);
}
QUntypedPropertyBinding
QQmlCppBinding::createBindingForBindable(const QV4::ExecutableCompilationUnit *unit,
QObject *thisObject, qsizetype functionIndex,
QObject *bindingTarget, int metaPropertyIndex,
int valueTypePropertyIndex, const QString &propertyName)
{
Q_UNUSED(propertyName);
QV4::Function *v4Function = unit->runtimeFunctions.value(functionIndex, nullptr);
if (!v4Function) {
// TODO: align with existing logging of such
qCritical() << "invalid JavaScript function index (internal error)";
return QUntypedPropertyBinding();
}
if (metaPropertyIndex < 0) {
// TODO: align with existing logging of such
qCritical() << "invalid meta property index (internal error)";
return QUntypedPropertyBinding();
}
const QMetaObject *mo = bindingTarget->metaObject();
Q_ASSERT(mo);
QMetaProperty property = mo->property(metaPropertyIndex);
Q_ASSERT(valueTypePropertyIndex == -1 || QString::fromUtf8(property.name()) == propertyName);
return createBindingInScope(
thisObject,
[&](const QQmlRefPointer<QQmlContextData> &ctxt, QV4::ExecutionContext *scope) {
auto index = QQmlPropertyIndex(property.propertyIndex(), valueTypePropertyIndex);
return QQmlPropertyBinding::create(property.metaType(), v4Function, thisObject,
ctxt, scope, bindingTarget, index);
});
}
void QQmlCppBinding::createBindingForNonBindable(const QV4::ExecutableCompilationUnit *unit,
QObject *thisObject, qsizetype functionIndex,
QObject *bindingTarget, int metaPropertyIndex,
int valueTypePropertyIndex,
const QString &propertyName)
{
Q_UNUSED(propertyName);
QV4::Function *v4Function = unit->runtimeFunctions.value(functionIndex, nullptr);
if (!v4Function) {
// TODO: align with existing logging of such
qCritical() << "invalid JavaScript function index (internal error)";
return;
}
if (metaPropertyIndex < 0) {
// TODO: align with existing logging of such
qCritical() << "invalid meta property index (internal error)";
return;
}
const QMetaObject *mo = bindingTarget->metaObject();
Q_ASSERT(mo);
QMetaProperty property = mo->property(metaPropertyIndex);
Q_ASSERT(valueTypePropertyIndex != -1 || QString::fromUtf8(property.name()) == propertyName);
createBindingInScope(
thisObject,
[&](const QQmlRefPointer<QQmlContextData> &ctxt, QV4::ExecutionContext *scope) -> void {
QQmlBinding *binding = QQmlBinding::create(property.metaType(), v4Function,
thisObject, ctxt, scope);
// almost as in qv4objectwrapper.cpp:535
Q_ASSERT(!property.isAlias()); // we convert aliases to (almost) real properties
binding->setTarget(bindingTarget, property.propertyIndex(), false,
valueTypePropertyIndex);
QQmlPropertyPrivate::setBinding(binding);
});
}
QT_END_NAMESPACE
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