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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
++ // Qt-Security score:significant
++
++ #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->context);
++ QQmlRefPointer<QQmlContextData> ctxtdata = QQmlRefPointer<QQmlContextData>(ddata->context);
++
++ 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);
++ });
++ }
++
++ QUntypedPropertyBinding QQmlCppBinding::createTranslationBindingForBindable(
++ const QQmlRefPointer<QV4::ExecutableCompilationUnit> &unit, QObject *bindingTarget,
++ int metaPropertyIndex, const QQmlTranslation &translationData, const QString &propertyName)
++ {
++ Q_UNUSED(propertyName);
++
++ 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(QString::fromUtf8(property.name()) == propertyName);
++
++ return QQmlTranslationPropertyBinding::create(property.metaType(), unit, translationData);
++ }
++
++ void QQmlCppBinding::createTranslationBindingForNonBindable(
++ const QQmlRefPointer<QV4::ExecutableCompilationUnit> &unit,
++ const QQmlSourceLocation &location, const QQmlTranslation &translationData,
++ QObject *thisObject, QObject *bindingTarget, int metaPropertyIndex,
++ const QString &propertyName, int valueTypePropertyIndex)
++ {
++ Q_UNUSED(propertyName);
++
++ 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(QString::fromUtf8(property.name()) == propertyName);
++
++ createBindingInScope(
++ thisObject,
++ [&](const QQmlRefPointer<QQmlContextData> &ctxt, QV4::ExecutionContext *) -> void {
++ QQmlBinding *binding = QQmlBinding::createTranslationBinding(
++ unit, ctxt, propertyName, translationData, location, thisObject);
++ // 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