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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtCore/QEvent>
#include <QtWidgets/qwidget.h>
#include <QtGui/qevent.h>
#include <QtGui/qscreen.h>
#include <QtGui/qwindow.h>
#include <QtGui/qguiapplication.h>
#include <QQuickView>
#include <QRegularExpression>
#include <QtGlobal>
#include <emscripten.h>
#include <emscripten/bind.h>
#include <emscripten/val.h>
#include <memory>
#include <sstream>
#include <vector>
#include <string>
using namespace emscripten;
static std::string toJSArray(const std::vector<std::string> &elements)
{
std::ostringstream out;
out << "[";
bool comma = false;
for (const auto &element : elements) {
out << (comma ? "," : "");
out << element;
comma = true;
}
out << "]";
return out.str();
}
static std::string toJSString(const QString &qstring)
{
Q_ASSERT_X(([qstring]() {
static QRegularExpression unescapedQuoteRegex(R"re((?:^|[^\\])')re");
return qstring.indexOf(unescapedQuoteRegex) == -1;
})(),
Q_FUNC_INFO, "Unescaped single quotes found");
return "'" + qstring.toStdString() + "'";
}
static std::string rectToJSObject(const QRect &rect)
{
std::ostringstream out;
out << "{" << " x: " << std::to_string(rect.x()) << "," << " y: " << std::to_string(rect.y())
<< "," << " width: " << std::to_string(rect.width()) << ","
<< " height: " << std::to_string(rect.height()) << "}";
return out.str();
}
static std::string screenToJSObject(const QScreen &screen)
{
std::ostringstream out;
out << "{" << " name: " << toJSString(screen.name()) << ","
<< " geometry: " << rectToJSObject(screen.geometry()) << "}";
return out.str();
}
static std::string windowToJSObject(const QWindow &window)
{
std::ostringstream out;
out << "{" << " id: " << std::to_string(window.winId()) << ","
<< " geometry: " << rectToJSObject(window.geometry()) << ","
<< " frameGeometry: " << rectToJSObject(window.frameGeometry()) << ","
<< " screen: " << screenToJSObject(*window.screen()) << "," << " title: '"
<< window.title().toStdString() << "' }";
return out.str();
}
static void windowInformation()
{
auto windows = qGuiApp->allWindows();
std::vector<std::string> windowsAsJsObjects;
windowsAsJsObjects.reserve(windows.size());
std::transform(windows.begin(), windows.end(), std::back_inserter(windowsAsJsObjects),
[](const QWindow *window) { return windowToJSObject(*window); });
emscripten::val::global("window").call<void>("windowInformationCallback",
emscripten::val(toJSArray(windowsAsJsObjects)));
}
static void screenInformation()
{
auto screens = qGuiApp->screens();
std::vector<std::string> screensAsJsObjects;
screensAsJsObjects.reserve(screens.size());
std::transform(screens.begin(), screens.end(), std::back_inserter(screensAsJsObjects),
[](const QScreen *screen) { return screenToJSObject(*screen); });
emscripten::val::global("window").call<void>("screenInformationCallback",
emscripten::val(toJSArray(screensAsJsObjects)));
}
QWindow *qmlParentWindow = nullptr;
static void run_QML(const std::string &qmlfile)
{
QScreen *parentScreen = nullptr;
{
auto screens = qGuiApp->screens();
if (screens.length() > 0)
parentScreen = screens[0];
else {
qWarning() << "No parent screen";
return;
}
}
qmlParentWindow = new QWindow(parentScreen);
qmlParentWindow->setFlag(Qt::WindowTitleHint);
qmlParentWindow->setFlag(Qt::WindowMaximizeButtonHint);
qmlParentWindow->setTitle("title");
qmlParentWindow->setGeometry(0, 0, 800, 800);
qmlParentWindow->setScreen(parentScreen);
qmlParentWindow->setVisible(true);
auto view = new QQuickView(qmlParentWindow);
view->setSource(QUrl(QString::fromUtf8(("qrc:/" + qmlfile).c_str())));
view->show();
}
static void kill_QML()
{
qmlParentWindow->deleteLater();
qmlParentWindow = NULL;
}
#if QT_CONFIG(wasm_jspi)
# define EMSC_BIND_FUNC(name, afunction) \
emscripten::function(name, afunction, emscripten::async())
#else
# define EMSC_BIND_FUNC(name, afunction) \
emscripten::function(name, afunction)
#endif
EMSCRIPTEN_BINDINGS(qwasmwindow)
{
EMSC_BIND_FUNC("screenInformation", &screenInformation);
EMSC_BIND_FUNC("windowInformation", &windowInformation);
EMSC_BIND_FUNC("run_QML", &run_QML);
EMSC_BIND_FUNC("kill_QML", &kill_QML);
}
int main(int argc, char **argv)
{
qputenv("QT_WASM_ENABLE_ACCESSIBILITY", "1");
QGuiApplication app(argc, argv);
app.exec();
return 0;
}
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