3 files changed, 168 insertions, 0 deletions

diff --git a/src/yuzu/CMakeLists.txt b/src/yuzu/CMakeLists.txt
index 17ecaafde..c6378bce9 100644
--- a/src/yuzu/CMakeLists.txt
+++ b/src/yuzu/CMakeLists.txt
@@ -11,6 +11,8 @@ add_executable(yuzu
     applets/profile_select.h
     applets/software_keyboard.cpp
     applets/software_keyboard.h
+    applets/web_browser.cpp
+    applets/web_browser.h
     bootmanager.cpp
     bootmanager.h
     compatibility_list.cpp
@@ -154,6 +156,11 @@ if (USE_DISCORD_PRESENCE)
     target_compile_definitions(yuzu PRIVATE -DUSE_DISCORD_PRESENCE)
 endif()
 
+if (YUZU_USE_QT_WEB_ENGINE)
+    target_link_libraries(yuzu PRIVATE Qt5::WebEngineCore Qt5::WebEngineWidgets)
+    target_compile_definitions(yuzu PRIVATE -DYUZU_USE_QT_WEB_ENGINE)
+endif ()
+
 if(UNIX AND NOT APPLE)
     install(TARGETS yuzu RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
 endif()
diff --git a/src/yuzu/main.cpp b/src/yuzu/main.cpp
index 01a0f94ab..18dc93c95 100644
--- a/src/yuzu/main.cpp
+++ b/src/yuzu/main.cpp
@@ -10,11 +10,14 @@
 // VFS includes must be before glad as they will conflict with Windows file api, which uses defines.
 #include "applets/profile_select.h"
 #include "applets/software_keyboard.h"
+#include "applets/web_browser.h"
 #include "configuration/configure_per_general.h"
 #include "core/file_sys/vfs.h"
 #include "core/file_sys/vfs_real.h"
 #include "core/hle/service/acc/profile_manager.h"
 #include "core/hle/service/am/applets/applets.h"
+#include "core/hle/service/hid/controllers/npad.h"
+#include "core/hle/service/hid/hid.h"
 
 // These are wrappers to avoid the calls to CreateDirectory and CreateFile because of the Windows
 // defines.
@@ -96,6 +99,14 @@ static FileSys::VirtualFile VfsDirectoryCreateFileWrapper(const FileSys::Virtual
 #include "yuzu/discord_impl.h"
 #endif
 
+#ifdef YUZU_USE_QT_WEB_ENGINE
+#include <QWebEngineProfile>
+#include <QWebEngineScript>
+#include <QWebEngineScriptCollection>
+#include <QWebEngineSettings>
+#include <QWebEngineView>
+#endif
+
 #ifdef QT_STATICPLUGIN
 Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin);
 #endif
@@ -252,6 +263,144 @@ void GMainWindow::SoftwareKeyboardInvokeCheckDialog(std::u16string error_message
     emit SoftwareKeyboardFinishedCheckDialog();
 }
 
+#ifdef YUZU_USE_QT_WEB_ENGINE
+
+void GMainWindow::WebBrowserOpenPage(std::string_view filename, std::string_view additional_args) {
+    NXInputWebEngineView web_browser_view(this);
+
+    // Scope to contain the QProgressDialog for initalization
+    {
+        QProgressDialog progress(this);
+        progress.setMinimumDuration(200);
+        progress.setLabelText(tr("Loading Web Applet..."));
+        progress.setRange(0, 4);
+        progress.setValue(0);
+        progress.show();
+
+        auto future = QtConcurrent::run([this] { emit WebBrowserUnpackRomFS(); });
+
+        while (!future.isFinished())
+            QApplication::processEvents();
+
+        progress.setValue(1);
+
+        // Load the special shim script to handle input and exit.
+        QWebEngineScript nx_shim;
+        nx_shim.setSourceCode(GetNXShimInjectionScript());
+        nx_shim.setWorldId(QWebEngineScript::MainWorld);
+        nx_shim.setName("nx_inject.js");
+        nx_shim.setInjectionPoint(QWebEngineScript::DocumentCreation);
+        nx_shim.setRunsOnSubFrames(true);
+        web_browser_view.page()->profile()->scripts()->insert(nx_shim);
+
+        web_browser_view.load(
+            QUrl(QUrl::fromLocalFile(QString::fromStdString(std::string(filename))).toString() +
+                 QString::fromStdString(std::string(additional_args))));
+
+        progress.setValue(2);
+
+        render_window->hide();
+        web_browser_view.setFocus();
+
+        const auto& layout = render_window->GetFramebufferLayout();
+        web_browser_view.resize(layout.screen.GetWidth(), layout.screen.GetHeight());
+        web_browser_view.move(layout.screen.left, layout.screen.top + menuBar()->height());
+        web_browser_view.setZoomFactor(static_cast<qreal>(layout.screen.GetWidth()) /
+                                       Layout::ScreenUndocked::Width);
+        web_browser_view.settings()->setAttribute(
+            QWebEngineSettings::LocalContentCanAccessRemoteUrls, true);
+
+        web_browser_view.show();
+
+        progress.setValue(3);
+
+        QApplication::processEvents();
+
+        progress.setValue(4);
+    }
+
+    bool finished = false;
+    QAction* exit_action = new QAction(tr("Exit Web Applet"), this);
+    connect(exit_action, &QAction::triggered, this, [&finished] { finished = true; });
+    ui.menubar->addAction(exit_action);
+
+    auto& npad =
+        Core::System::GetInstance()
+            .ServiceManager()
+            .GetService<Service::HID::Hid>("hid")
+            ->GetAppletResource()
+            ->GetController<Service::HID::Controller_NPad>(Service::HID::HidController::NPad);
+
+    const auto fire_js_keypress = [&web_browser_view](u32 key_code) {
+        web_browser_view.page()->runJavaScript(
+            QStringLiteral("document.dispatchEvent(new KeyboardEvent('keydown', {'key': %1}));")
+                .arg(QString::fromStdString(std::to_string(key_code))));
+    };
+
+    bool running_exit_check = false;
+    while (!finished) {
+        QApplication::processEvents();
+
+        if (!running_exit_check) {
+            web_browser_view.page()->runJavaScript(QStringLiteral("applet_done;"),
+                                                   [&](const QVariant& res) {
+                                                       running_exit_check = false;
+                                                       if (res.toBool())
+                                                           finished = true;
+                                                   });
+            running_exit_check = true;
+        }
+
+        const auto input = npad.GetPressState();
+        for (std::size_t i = 0; i < Settings::NativeButton::NumButtons; ++i) {
+            if ((input & (1 << i)) != 0) {
+                LOG_DEBUG(Frontend, "firing input for button id={:02X}", i);
+                web_browser_view.page()->runJavaScript(
+                    QStringLiteral("yuzu_key_callbacks[%1]();").arg(i));
+            }
+        }
+
+        if (input & 0x00888000)      // RStick Down | LStick Down | DPad Down
+            fire_js_keypress(40);    // Down Arrow Key
+        else if (input & 0x00444000) // RStick Right | LStick Right | DPad Right
+            fire_js_keypress(39);    // Right Arrow Key
+        else if (input & 0x00222000) // RStick Up | LStick Up | DPad Up
+            fire_js_keypress(38);    // Up Arrow Key
+        else if (input & 0x00111000) // RStick Left | LStick Left | DPad Left
+            fire_js_keypress(37);    // Left Arrow Key
+        else if (input & 0x00000001) // A Button
+            fire_js_keypress(13);    // Enter Key
+    }
+
+    web_browser_view.hide();
+    render_window->show();
+    render_window->setFocus();
+    ui.menubar->removeAction(exit_action);
+
+    // Needed to update render window focus/show and remove menubar action
+    QApplication::processEvents();
+    emit WebBrowserFinishedBrowsing();
+}
+
+#else
+
+void GMainWindow::WebBrowserOpenPage(std::string_view filename, std::string_view additional_args) {
+    QMessageBox::warning(
+        this, tr("Web Applet"),
+        tr("This version of yuzu was built without QtWebEngine support, meaning that yuzu cannot "
+           "properly display the game manual or web page requested."),
+        QMessageBox::Ok, QMessageBox::Ok);
+
+    LOG_INFO(Frontend,
+             "(STUBBED) called - Missing QtWebEngine dependency needed to open website page at "
+             "'{}' with arguments '{}'!",
+             filename, additional_args);
+
+    emit WebBrowserFinishedBrowsing();
+}
+
+#endif
+
 void GMainWindow::InitializeWidgets() {
 #ifdef YUZU_ENABLE_COMPATIBILITY_REPORTING
     ui.action_Report_Compatibility->setVisible(true);
@@ -612,6 +761,7 @@ bool GMainWindow::LoadROM(const QString& filename) {
 
     system.SetProfileSelector(std::make_unique<QtProfileSelector>(*this));
     system.SetSoftwareKeyboard(std::make_unique<QtSoftwareKeyboard>(*this));
+    system.SetWebBrowser(std::make_unique<QtWebBrowser>(*this));
 
     const Core::System::ResultStatus result{system.Load(*render_window, filename.toStdString())};
 
@@ -1315,6 +1465,7 @@ void GMainWindow::OnStartGame() {
     qRegisterMetaType<Core::System::ResultStatus>("Core::System::ResultStatus");
     qRegisterMetaType<std::string>("std::string");
     qRegisterMetaType<std::optional<std::u16string>>("std::optional<std::u16string>");
+    qRegisterMetaType<std::string_view>("std::string_view");
 
     connect(emu_thread.get(), &EmuThread::ErrorThrown, this, &GMainWindow::OnCoreError);
 
diff --git a/src/yuzu/main.h b/src/yuzu/main.h
index 4e37f6a2d..3af5fa1f3 100644
--- a/src/yuzu/main.h
+++ b/src/yuzu/main.h
@@ -26,6 +26,7 @@ class GraphicsSurfaceWidget;
 class GRenderWindow;
 class MicroProfileDialog;
 class ProfilerWidget;
+class QLabel;
 class WaitTreeWidget;
 enum class GameListOpenTarget;
 
@@ -38,6 +39,10 @@ class RegisteredCacheUnion;
 class VfsFilesystem;
 } // namespace FileSys
 
+namespace Service::Account {
+struct UUID;
+} // namespace Service::Account
+
 namespace Tegra {
 class DebugContext;
 }
@@ -103,11 +108,16 @@ signals:
     void SoftwareKeyboardFinishedText(std::optional<std::u16string> text);
     void SoftwareKeyboardFinishedCheckDialog();
 
+    void WebBrowserUnpackRomFS();
+    void WebBrowserFinishedBrowsing();
+
 public slots:
     void ProfileSelectorSelectProfile();
     void SoftwareKeyboardGetText(const Core::Frontend::SoftwareKeyboardParameters& parameters);
     void SoftwareKeyboardInvokeCheckDialog(std::u16string error_message);
 
+    void WebBrowserOpenPage(std::string_view filename, std::string_view arguments);
+
 private:
     void InitializeWidgets();
     void InitializeDebugWidgets();