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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "jsexpander.h"
#include "corejsextensions.h"
#include "coreplugintr.h"
#include <utils/macroexpander.h>
#include <utils/qtcassert.h>
#include <QDebug>
#include <QJSEngine>
#include <unordered_map>
using ExtensionMap = std::unordered_map<QString, Core::JsExpander::ObjectFactory>;
Q_GLOBAL_STATIC(ExtensionMap, globalJsExtensions);
static Core::JsExpander *globalExpander = nullptr;
namespace Core {
namespace Internal {
class JsExpanderPrivate {
public:
QJSEngine m_engine;
};
} // namespace Internal
void JsExpander::registerGlobalObject(const QString &name, const ObjectFactory &factory)
{
globalJsExtensions->insert({name, factory});
if (globalExpander)
globalExpander->registerObject(name, factory());
}
void JsExpander::registerObject(const QString &name, QObject *obj)
{
QJSValue jsObj = d->m_engine.newQObject(obj);
d->m_engine.globalObject().setProperty(name, jsObj);
}
QString JsExpander::evaluate(const QString &expression, QString *errorMessage)
{
QJSValue value = d->m_engine.evaluate(expression);
if (value.isError()) {
const QString msg = Tr::tr("Error in \"%1\": %2").arg(expression, value.toString());
if (errorMessage)
*errorMessage = msg;
return QString();
}
// Try to convert to bool, be that an int or whatever.
if (value.isBool())
return value.toString();
if (value.isNumber())
return QString::number(value.toNumber());
if (value.isString())
return value.toString();
QString msg = Tr::tr("Cannot convert result of \"%1\" to string.").arg(expression);
if (errorMessage)
*errorMessage = msg;
return QString();
}
QJSEngine &JsExpander::engine()
{
return d->m_engine;
}
void JsExpander::registerForExpander(Utils::MacroExpander *macroExpander)
{
macroExpander->registerPrefix(
"JS",
Tr::tr("Evaluate simple JavaScript statements.<br>"
"Literal '}' characters must be escaped as \"\\}\", "
"'\\' characters must be escaped as \"\\\\\", "
"and \"%{\" must be escaped as \"%\\{\"."),
[this](QString in) -> QString {
QString errorMessage;
QString result = evaluate(in, &errorMessage);
if (!errorMessage.isEmpty()) {
qWarning() << errorMessage;
return errorMessage;
} else {
return result;
}
});
}
JsExpander *JsExpander::createGlobalJsExpander()
{
globalExpander = new JsExpander();
registerGlobalObject<Internal::UtilsJsExtension>("Util");
globalExpander->registerForExpander(Utils::globalMacroExpander());
return globalExpander;
}
JsExpander::JsExpander()
{
d = new Internal::JsExpanderPrivate;
for (const std::pair<const QString, ObjectFactory> &obj : *globalJsExtensions)
registerObject(obj.first, obj.second());
}
JsExpander::~JsExpander()
{
delete d;
d = nullptr;
}
} // namespace Core
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