Merge pull request #5042 from Morph1984/project-aether

Project Aether: Reimplementation of the Web Browser Applet

src/yuzu/CMakeLists.txt

@@ -141,6 +141,8 @@ add_executable(yuzu
     util/limitable_input_dialog.h
     util/sequence_dialog/sequence_dialog.cpp
     util/sequence_dialog/sequence_dialog.h
+    util/url_request_interceptor.cpp
+    util/url_request_interceptor.h
     util/util.cpp
     util/util.h
     compatdb.cpp

src/yuzu/applets/web_browser.cpp

@@ -1,115 +1,414 @@
-// Copyright 2018 yuzu Emulator Project
+// Copyright 2020 yuzu Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <mutex>
-
+#ifdef YUZU_USE_QT_WEB_ENGINE
 #include <QKeyEvent>
 
-#include "core/hle/lock.h"
+#include <QWebEngineProfile>
+#include <QWebEngineScript>
+#include <QWebEngineScriptCollection>
+#include <QWebEngineSettings>
+#include <QWebEngineUrlScheme>
+#endif
+
+#include "common/file_util.h"
+#include "core/core.h"
+#include "core/frontend/input_interpreter.h"
+#include "input_common/keyboard.h"
+#include "input_common/main.h"
 #include "yuzu/applets/web_browser.h"
+#include "yuzu/applets/web_browser_scripts.h"
 #include "yuzu/main.h"
+#include "yuzu/util/url_request_interceptor.h"
 
 #ifdef YUZU_USE_QT_WEB_ENGINE
 
-constexpr char NX_SHIM_INJECT_SCRIPT[] = R"(
-    window.nx = {};
-    window.nx.playReport = {};
-    window.nx.playReport.setCounterSetIdentifier = function () {
-        console.log("nx.playReport.setCounterSetIdentifier called - unimplemented");
-    };
+namespace {
 
-    window.nx.playReport.incrementCounter = function () {
-        console.log("nx.playReport.incrementCounter called - unimplemented");
-    };
+constexpr int HIDButtonToKey(HIDButton button) {
+    switch (button) {
+    case HIDButton::DLeft:
+    case HIDButton::LStickLeft:
+        return Qt::Key_Left;
+    case HIDButton::DUp:
+    case HIDButton::LStickUp:
+        return Qt::Key_Up;
+    case HIDButton::DRight:
+    case HIDButton::LStickRight:
+        return Qt::Key_Right;
+    case HIDButton::DDown:
+    case HIDButton::LStickDown:
+        return Qt::Key_Down;
+    default:
+        return 0;
+    }
+}
 
-    window.nx.footer = {};
-    window.nx.footer.unsetAssign = function () {
-        console.log("nx.footer.unsetAssign called - unimplemented");
-    };
+} // Anonymous namespace
 
-    var yuzu_key_callbacks = [];
-    window.nx.footer.setAssign = function(key, discard1, func, discard2) {
-        switch (key) {
-        case 'A':
-            yuzu_key_callbacks[0] = func;
-            break;
-        case 'B':
-            yuzu_key_callbacks[1] = func;
-            break;
-        case 'X':
-            yuzu_key_callbacks[2] = func;
-            break;
-        case 'Y':
-            yuzu_key_callbacks[3] = func;
-            break;
-        case 'L':
-            yuzu_key_callbacks[6] = func;
-            break;
-        case 'R':
-            yuzu_key_callbacks[7] = func;
-            break;
+QtNXWebEngineView::QtNXWebEngineView(QWidget* parent, Core::System& system,
+                                     InputCommon::InputSubsystem* input_subsystem_)
+    : QWebEngineView(parent), input_subsystem{input_subsystem_},
+      url_interceptor(std::make_unique<UrlRequestInterceptor>()),
+      input_interpreter(std::make_unique<InputInterpreter>(system)),
+      default_profile{QWebEngineProfile::defaultProfile()},
+      global_settings{QWebEngineSettings::globalSettings()} {
+    QWebEngineScript gamepad;
+    QWebEngineScript window_nx;
+
+    gamepad.setName(QStringLiteral("gamepad_script.js"));
+    window_nx.setName(QStringLiteral("window_nx_script.js"));
+
+    gamepad.setSourceCode(QString::fromStdString(GAMEPAD_SCRIPT));
+    window_nx.setSourceCode(QString::fromStdString(WINDOW_NX_SCRIPT));
+
+    gamepad.setInjectionPoint(QWebEngineScript::DocumentCreation);
+    window_nx.setInjectionPoint(QWebEngineScript::DocumentCreation);
+
+    gamepad.setWorldId(QWebEngineScript::MainWorld);
+    window_nx.setWorldId(QWebEngineScript::MainWorld);
+
+    gamepad.setRunsOnSubFrames(true);
+    window_nx.setRunsOnSubFrames(true);
+
+    default_profile->scripts()->insert(gamepad);
+    default_profile->scripts()->insert(window_nx);
+
+    default_profile->setRequestInterceptor(url_interceptor.get());
+
+    global_settings->setAttribute(QWebEngineSettings::LocalContentCanAccessRemoteUrls, true);
+    global_settings->setAttribute(QWebEngineSettings::FullScreenSupportEnabled, true);
+    global_settings->setAttribute(QWebEngineSettings::AllowRunningInsecureContent, true);
+    global_settings->setAttribute(QWebEngineSettings::FocusOnNavigationEnabled, true);
+    global_settings->setAttribute(QWebEngineSettings::AllowWindowActivationFromJavaScript, true);
+    global_settings->setAttribute(QWebEngineSettings::ShowScrollBars, false);
+
+    global_settings->setFontFamily(QWebEngineSettings::StandardFont, QStringLiteral("Roboto"));
+
+    connect(
+        page(), &QWebEnginePage::windowCloseRequested, page(),
+        [this] {
+            if (page()->url() == url_interceptor->GetRequestedURL()) {
+                SetFinished(true);
+                SetExitReason(Service::AM::Applets::WebExitReason::WindowClosed);
+            }
+        },
+        Qt::QueuedConnection);
+}
+
+QtNXWebEngineView::~QtNXWebEngineView() {
+    SetFinished(true);
+    StopInputThread();
+}
+
+void QtNXWebEngineView::LoadLocalWebPage(std::string_view main_url,
+                                         std::string_view additional_args) {
+    is_local = true;
+
+    LoadExtractedFonts();
+    SetUserAgent(UserAgent::WebApplet);
+    SetFinished(false);
+    SetExitReason(Service::AM::Applets::WebExitReason::EndButtonPressed);
+    SetLastURL("http://localhost/");
+    StartInputThread();
+
+    load(QUrl(QUrl::fromLocalFile(QString::fromStdString(std::string(main_url))).toString() +
+              QString::fromStdString(std::string(additional_args))));
+}
+
+void QtNXWebEngineView::LoadExternalWebPage(std::string_view main_url,
+                                            std::string_view additional_args) {
+    is_local = false;
+
+    SetUserAgent(UserAgent::WebApplet);
+    SetFinished(false);
+    SetExitReason(Service::AM::Applets::WebExitReason::EndButtonPressed);
+    SetLastURL("http://localhost/");
+    StartInputThread();
+
+    load(QUrl(QString::fromStdString(std::string(main_url)) +
+              QString::fromStdString(std::string(additional_args))));
+}
+
+void QtNXWebEngineView::SetUserAgent(UserAgent user_agent) {
+    const QString user_agent_str = [user_agent] {
+        switch (user_agent) {
+        case UserAgent::WebApplet:
+        default:
+            return QStringLiteral("WebApplet");
+        case UserAgent::ShopN:
+            return QStringLiteral("ShopN");
+        case UserAgent::LoginApplet:
+            return QStringLiteral("LoginApplet");
+        case UserAgent::ShareApplet:
+            return QStringLiteral("ShareApplet");
+        case UserAgent::LobbyApplet:
+            return QStringLiteral("LobbyApplet");
+        case UserAgent::WifiWebAuthApplet:
+            return QStringLiteral("WifiWebAuthApplet");
+        }
+    }();
+
+    QWebEngineProfile::defaultProfile()->setHttpUserAgent(
+        QStringLiteral("Mozilla/5.0 (Nintendo Switch; %1) AppleWebKit/606.4 "
+                       "(KHTML, like Gecko) NF/6.0.1.15.4 NintendoBrowser/5.1.0.20389")
+            .arg(user_agent_str));
+}
+
+bool QtNXWebEngineView::IsFinished() const {
+    return finished;
+}
+
+void QtNXWebEngineView::SetFinished(bool finished_) {
+    finished = finished_;
+}
+
+Service::AM::Applets::WebExitReason QtNXWebEngineView::GetExitReason() const {
+    return exit_reason;
+}
+
+void QtNXWebEngineView::SetExitReason(Service::AM::Applets::WebExitReason exit_reason_) {
+    exit_reason = exit_reason_;
+}
+
+const std::string& QtNXWebEngineView::GetLastURL() const {
+    return last_url;
+}
+
+void QtNXWebEngineView::SetLastURL(std::string last_url_) {
+    last_url = std::move(last_url_);
+}
+
+QString QtNXWebEngineView::GetCurrentURL() const {
+    return url_interceptor->GetRequestedURL().toString();
+}
+
+void QtNXWebEngineView::hide() {
+    SetFinished(true);
+    StopInputThread();
+
+    QWidget::hide();
+}
+
+void QtNXWebEngineView::keyPressEvent(QKeyEvent* event) {
+    if (is_local) {
+        input_subsystem->GetKeyboard()->PressKey(event->key());
+    }
+}
+
+void QtNXWebEngineView::keyReleaseEvent(QKeyEvent* event) {
+    if (is_local) {
+        input_subsystem->GetKeyboard()->ReleaseKey(event->key());
+    }
+}
+
+template <HIDButton... T>
+void QtNXWebEngineView::HandleWindowFooterButtonPressedOnce() {
+    const auto f = [this](HIDButton button) {
+        if (input_interpreter->IsButtonPressedOnce(button)) {
+            page()->runJavaScript(
+                QStringLiteral("yuzu_key_callbacks[%1] == null;").arg(static_cast<u8>(button)),
+                [&](const QVariant& variant) {
+                    if (variant.toBool()) {
+                        switch (button) {
+                        case HIDButton::A:
+                            SendMultipleKeyPressEvents<Qt::Key_A, Qt::Key_Space, Qt::Key_Return>();
+                            break;
+                        case HIDButton::B:
+                            SendKeyPressEvent(Qt::Key_B);
+                            break;
+                        case HIDButton::X:
+                            SendKeyPressEvent(Qt::Key_X);
+                            break;
+                        case HIDButton::Y:
+                            SendKeyPressEvent(Qt::Key_Y);
+                            break;
+                        default:
+                            break;
+                        }
+                    }
+                });
+
+            page()->runJavaScript(
+                QStringLiteral("if (yuzu_key_callbacks[%1] != null) { yuzu_key_callbacks[%1](); }")
+                    .arg(static_cast<u8>(button)));
         }
     };
 
-    var applet_done = false;
-    window.nx.endApplet = function() {
-        applet_done = true;
+    (f(T), ...);
+}
+
+template <HIDButton... T>
+void QtNXWebEngineView::HandleWindowKeyButtonPressedOnce() {
+    const auto f = [this](HIDButton button) {
+        if (input_interpreter->IsButtonPressedOnce(button)) {
+            SendKeyPressEvent(HIDButtonToKey(button));
+        }
     };
 
-    window.onkeypress = function(e) { if (e.keyCode === 13) { applet_done = true; } };
-)";
-
-QString GetNXShimInjectionScript() {
-    return QString::fromStdString(NX_SHIM_INJECT_SCRIPT);
+    (f(T), ...);
 }
 
-NXInputWebEngineView::NXInputWebEngineView(QWidget* parent) : QWebEngineView(parent) {}
+template <HIDButton... T>
+void QtNXWebEngineView::HandleWindowKeyButtonHold() {
+    const auto f = [this](HIDButton button) {
+        if (input_interpreter->IsButtonHeld(button)) {
+            SendKeyPressEvent(HIDButtonToKey(button));
+        }
+    };
 
-void NXInputWebEngineView::keyPressEvent(QKeyEvent* event) {
-    parent()->event(event);
+    (f(T), ...);
 }
 
-void NXInputWebEngineView::keyReleaseEvent(QKeyEvent* event) {
-    parent()->event(event);
+void QtNXWebEngineView::SendKeyPressEvent(int key) {
+    if (key == 0) {
+        return;
+    }
+
+    QCoreApplication::postEvent(focusProxy(),
+                                new QKeyEvent(QKeyEvent::KeyPress, key, Qt::NoModifier));
+    QCoreApplication::postEvent(focusProxy(),
+                                new QKeyEvent(QKeyEvent::KeyRelease, key, Qt::NoModifier));
+}
+
+void QtNXWebEngineView::StartInputThread() {
+    if (input_thread_running) {
+        return;
+    }
+
+    input_thread_running = true;
+    input_thread = std::thread(&QtNXWebEngineView::InputThread, this);
+}
+
+void QtNXWebEngineView::StopInputThread() {
+    if (is_local) {
+        QWidget::releaseKeyboard();
+    }
+
+    input_thread_running = false;
+    if (input_thread.joinable()) {
+        input_thread.join();
+    }
+}
+
+void QtNXWebEngineView::InputThread() {
+    // Wait for 1 second before allowing any inputs to be processed.
+    std::this_thread::sleep_for(std::chrono::seconds(1));
+
+    if (is_local) {
+        QWidget::grabKeyboard();
+    }
+
+    while (input_thread_running) {
+        input_interpreter->PollInput();
+
+        HandleWindowFooterButtonPressedOnce<HIDButton::A, HIDButton::B, HIDButton::X, HIDButton::Y,
+                                            HIDButton::L, HIDButton::R>();
+
+        HandleWindowKeyButtonPressedOnce<HIDButton::DLeft, HIDButton::DUp, HIDButton::DRight,
+                                         HIDButton::DDown, HIDButton::LStickLeft,
+                                         HIDButton::LStickUp, HIDButton::LStickRight,
+                                         HIDButton::LStickDown>();
+
+        HandleWindowKeyButtonHold<HIDButton::DLeft, HIDButton::DUp, HIDButton::DRight,
+                                  HIDButton::DDown, HIDButton::LStickLeft, HIDButton::LStickUp,
+                                  HIDButton::LStickRight, HIDButton::LStickDown>();
+
+        std::this_thread::sleep_for(std::chrono::milliseconds(50));
+    }
+}
+
+void QtNXWebEngineView::LoadExtractedFonts() {
+    QWebEngineScript nx_font_css;
+    QWebEngineScript load_nx_font;
+
+    const QString fonts_dir = QString::fromStdString(Common::FS::SanitizePath(
+        fmt::format("{}/fonts", Common::FS::GetUserPath(Common::FS::UserPath::CacheDir))));
+
+    nx_font_css.setName(QStringLiteral("nx_font_css.js"));
+    load_nx_font.setName(QStringLiteral("load_nx_font.js"));
+
+    nx_font_css.setSourceCode(
+        QString::fromStdString(NX_FONT_CSS)
+            .arg(fonts_dir + QStringLiteral("/FontStandard.ttf"))
+            .arg(fonts_dir + QStringLiteral("/FontChineseSimplified.ttf"))
+            .arg(fonts_dir + QStringLiteral("/FontExtendedChineseSimplified.ttf"))
+            .arg(fonts_dir + QStringLiteral("/FontChineseTraditional.ttf"))
+            .arg(fonts_dir + QStringLiteral("/FontKorean.ttf"))
+            .arg(fonts_dir + QStringLiteral("/FontNintendoExtended.ttf"))
+            .arg(fonts_dir + QStringLiteral("/FontNintendoExtended2.ttf")));
+    load_nx_font.setSourceCode(QString::fromStdString(LOAD_NX_FONT));
+
+    nx_font_css.setInjectionPoint(QWebEngineScript::DocumentReady);
+    load_nx_font.setInjectionPoint(QWebEngineScript::Deferred);
+
+    nx_font_css.setWorldId(QWebEngineScript::MainWorld);
+    load_nx_font.setWorldId(QWebEngineScript::MainWorld);
+
+    nx_font_css.setRunsOnSubFrames(true);
+    load_nx_font.setRunsOnSubFrames(true);
+
+    default_profile->scripts()->insert(nx_font_css);
+    default_profile->scripts()->insert(load_nx_font);
+
+    connect(
+        url_interceptor.get(), &UrlRequestInterceptor::FrameChanged, url_interceptor.get(),
+        [this] {
+            std::this_thread::sleep_for(std::chrono::milliseconds(50));
+            page()->runJavaScript(QString::fromStdString(LOAD_NX_FONT));
+        },
+        Qt::QueuedConnection);
 }
 
 #endif
 
 QtWebBrowser::QtWebBrowser(GMainWindow& main_window) {
-    connect(this, &QtWebBrowser::MainWindowOpenPage, &main_window, &GMainWindow::WebBrowserOpenPage,
-            Qt::QueuedConnection);
-    connect(&main_window, &GMainWindow::WebBrowserUnpackRomFS, this,
-            &QtWebBrowser::MainWindowUnpackRomFS, Qt::QueuedConnection);
-    connect(&main_window, &GMainWindow::WebBrowserFinishedBrowsing, this,
-            &QtWebBrowser::MainWindowFinishedBrowsing, Qt::QueuedConnection);
+    connect(this, &QtWebBrowser::MainWindowOpenWebPage, &main_window,
+            &GMainWindow::WebBrowserOpenWebPage, Qt::QueuedConnection);
+    connect(&main_window, &GMainWindow::WebBrowserExtractOfflineRomFS, this,
+            &QtWebBrowser::MainWindowExtractOfflineRomFS, Qt::QueuedConnection);
+    connect(&main_window, &GMainWindow::WebBrowserClosed, this,
+            &QtWebBrowser::MainWindowWebBrowserClosed, Qt::QueuedConnection);
 }
 
 QtWebBrowser::~QtWebBrowser() = default;
 
-void QtWebBrowser::OpenPageLocal(std::string_view url, std::function<void()> unpack_romfs_callback_,
-                                 std::function<void()> finished_callback_) {
-    unpack_romfs_callback = std::move(unpack_romfs_callback_);
-    finished_callback = std::move(finished_callback_);
+void QtWebBrowser::OpenLocalWebPage(
+    std::string_view local_url, std::function<void()> extract_romfs_callback_,
+    std::function<void(Service::AM::Applets::WebExitReason, std::string)> callback_) const {
+    extract_romfs_callback = std::move(extract_romfs_callback_);
+    callback = std::move(callback_);
+
+    const auto index = local_url.find('?');
 
-    const auto index = url.find('?');
     if (index == std::string::npos) {
-        emit MainWindowOpenPage(url, "");
+        emit MainWindowOpenWebPage(local_url, "", true);
     } else {
-        const auto front = url.substr(0, index);
-        const auto back = url.substr(index);
-        emit MainWindowOpenPage(front, back);
+        emit MainWindowOpenWebPage(local_url.substr(0, index), local_url.substr(index), true);
     }
 }
 
-void QtWebBrowser::MainWindowUnpackRomFS() {
-    // Acquire the HLE mutex
-    std::lock_guard lock{HLE::g_hle_lock};
-    unpack_romfs_callback();
+void QtWebBrowser::OpenExternalWebPage(
+    std::string_view external_url,
+    std::function<void(Service::AM::Applets::WebExitReason, std::string)> callback_) const {
+    callback = std::move(callback_);
+
+    const auto index = external_url.find('?');
+
+    if (index == std::string::npos) {
+        emit MainWindowOpenWebPage(external_url, "", false);
+    } else {
+        emit MainWindowOpenWebPage(external_url.substr(0, index), external_url.substr(index),
+                                   false);
+    }
 }
 
-void QtWebBrowser::MainWindowFinishedBrowsing() {
-    // Acquire the HLE mutex
-    std::lock_guard lock{HLE::g_hle_lock};
-    finished_callback();
+void QtWebBrowser::MainWindowExtractOfflineRomFS() {
+    extract_romfs_callback();
+}
+
+void QtWebBrowser::MainWindowWebBrowserClosed(Service::AM::Applets::WebExitReason exit_reason,
+                                              std::string last_url) {
+    callback(exit_reason, last_url);
 }

src/yuzu/applets/web_browser.h

@@ -1,10 +1,13 @@
-// Copyright 2018 yuzu Emulator Project
+// Copyright 2020 yuzu Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #pragma once
 
-#include <functional>
+#include <atomic>
+#include <memory>
+#include <thread>
+
 #include <QObject>
 
 #ifdef YUZU_USE_QT_WEB_ENGINE
@@ -13,19 +16,172 @@
 
 #include "core/frontend/applets/web_browser.h"
 
+enum class HIDButton : u8;
+
 class GMainWindow;
+class InputInterpreter;
+class UrlRequestInterceptor;
+
+namespace Core {
+class System;
+}
+
+namespace InputCommon {
+class InputSubsystem;
+}
 
 #ifdef YUZU_USE_QT_WEB_ENGINE
 
-QString GetNXShimInjectionScript();
+enum class UserAgent {
+    WebApplet,
+    ShopN,
+    LoginApplet,
+    ShareApplet,
+    LobbyApplet,
+    WifiWebAuthApplet,
+};
+
+class QWebEngineProfile;
+class QWebEngineSettings;
+
+class QtNXWebEngineView : public QWebEngineView {
+    Q_OBJECT
 
-class NXInputWebEngineView : public QWebEngineView {
 public:
-    explicit NXInputWebEngineView(QWidget* parent = nullptr);
+    explicit QtNXWebEngineView(QWidget* parent, Core::System& system,
+                               InputCommon::InputSubsystem* input_subsystem_);
+    ~QtNXWebEngineView() override;
+
+    /**
+     * Loads a HTML document that exists locally. Cannot be used to load external websites.
+     *
+     * @param main_url The url to the file.
+     * @param additional_args Additional arguments appended to the main url.
+     */
+    void LoadLocalWebPage(std::string_view main_url, std::string_view additional_args);
+
+    /**
+     * Loads an external website. Cannot be used to load local urls.
+     *
+     * @param main_url The url to the website.
+     * @param additional_args Additional arguments appended to the main url.
+     */
+    void LoadExternalWebPage(std::string_view main_url, std::string_view additional_args);
+
+    /**
+     * Sets the background color of the web page.
+     *
+     * @param color The color to set.
+     */
+    void SetBackgroundColor(QColor color);
+
+    /**
+     * Sets the user agent of the web browser.
+     *
+     * @param user_agent The user agent enum.
+     */
+    void SetUserAgent(UserAgent user_agent);
+
+    [[nodiscard]] bool IsFinished() const;
+    void SetFinished(bool finished_);
+
+    [[nodiscard]] Service::AM::Applets::WebExitReason GetExitReason() const;
+    void SetExitReason(Service::AM::Applets::WebExitReason exit_reason_);
+
+    [[nodiscard]] const std::string& GetLastURL() const;
+    void SetLastURL(std::string last_url_);
+
+    /**
+     * This gets the current URL that has been requested by the webpage.
+     * This only applies to the main frame. Sub frames and other resources are ignored.
+     *
+     * @return Currently requested URL
+     */
+    [[nodiscard]] QString GetCurrentURL() const;
+
+public slots:
+    void hide();
 
 protected:
     void keyPressEvent(QKeyEvent* event) override;
     void keyReleaseEvent(QKeyEvent* event) override;
+
+private:
+    /**
+     * Handles button presses to execute functions assigned in yuzu_key_callbacks.
+     * yuzu_key_callbacks contains specialized functions for the buttons in the window footer
+     * that can be overriden by games to achieve desired functionality.
+     *
+     * @tparam HIDButton The list of buttons contained in yuzu_key_callbacks
+     */
+    template <HIDButton... T>
+    void HandleWindowFooterButtonPressedOnce();
+
+    /**
+     * Handles button presses and converts them into keyboard input.
+     * This should only be used to convert D-Pad or Analog Stick input into arrow keys.
+     *
+     * @tparam HIDButton The list of buttons that can be converted into keyboard input.
+     */
+    template <HIDButton... T>
+    void HandleWindowKeyButtonPressedOnce();
+
+    /**
+     * Handles button holds and converts them into keyboard input.
+     * This should only be used to convert D-Pad or Analog Stick input into arrow keys.
+     *
+     * @tparam HIDButton The list of buttons that can be converted into keyboard input.
+     */
+    template <HIDButton... T>
+    void HandleWindowKeyButtonHold();
+
+    /**
+     * Sends a key press event to QWebEngineView.
+     *
+     * @param key Qt key code.
+     */
+    void SendKeyPressEvent(int key);
+
+    /**
+     * Sends multiple key press events to QWebEngineView.
+     *
+     * @tparam int Qt key code.
+     */
+    template <int... T>
+    void SendMultipleKeyPressEvents() {
+        (SendKeyPressEvent(T), ...);
+    }
+
+    void StartInputThread();
+    void StopInputThread();
+
+    /// The thread where input is being polled and processed.
+    void InputThread();
+
+    /// Loads the extracted fonts using JavaScript.
+    void LoadExtractedFonts();
+
+    InputCommon::InputSubsystem* input_subsystem;
+
+    std::unique_ptr<UrlRequestInterceptor> url_interceptor;
+
+    std::unique_ptr<InputInterpreter> input_interpreter;
+
+    std::thread input_thread;
+
+    std::atomic<bool> input_thread_running{};
+
+    std::atomic<bool> finished{};
+
+    Service::AM::Applets::WebExitReason exit_reason{
+        Service::AM::Applets::WebExitReason::EndButtonPressed};
+
+    std::string last_url{"http://localhost/"};
+
+    bool is_local{};
+
+    QWebEngineProfile* default_profile;
+    QWebEngineSettings* global_settings;
 };
 
 #endif
@@ -34,19 +190,28 @@ class QtWebBrowser final : public QObject, public Core::Frontend::WebBrowserAppl
     Q_OBJECT
 
 public:
-    explicit QtWebBrowser(GMainWindow& main_window);
+    explicit QtWebBrowser(GMainWindow& parent);
     ~QtWebBrowser() override;
 
-    void OpenPageLocal(std::string_view url, std::function<void()> unpack_romfs_callback_,
-                       std::function<void()> finished_callback_) override;
+    void OpenLocalWebPage(std::string_view local_url, std::function<void()> extract_romfs_callback_,
+                          std::function<void(Service::AM::Applets::WebExitReason, std::string)>
+                              callback_) const override;
+
+    void OpenExternalWebPage(std::string_view external_url,
+                             std::function<void(Service::AM::Applets::WebExitReason, std::string)>
+                                 callback_) const override;
 
 signals:
-    void MainWindowOpenPage(std::string_view filename, std::string_view additional_args) const;
+    void MainWindowOpenWebPage(std::string_view main_url, std::string_view additional_args,
+                               bool is_local) const;
 
 private:
-    void MainWindowUnpackRomFS();
-    void MainWindowFinishedBrowsing();
+    void MainWindowExtractOfflineRomFS();
 
-    std::function<void()> unpack_romfs_callback;
-    std::function<void()> finished_callback;
+    void MainWindowWebBrowserClosed(Service::AM::Applets::WebExitReason exit_reason,
+                                    std::string last_url);
+
+    mutable std::function<void()> extract_romfs_callback;
+
+    mutable std::function<void(Service::AM::Applets::WebExitReason, std::string)> callback;
 };

src/yuzu/applets/web_browser_scripts.h

@@ -0,0 +1,193 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+constexpr char NX_FONT_CSS[] = R"(
+(function() {
+    css = document.createElement('style');
+    css.type = 'text/css';
+    css.id = 'nx_font';
+    css.innerText = `
+/* FontStandard */
+@font-face {
+    font-family: 'FontStandard';
+    src: url('%1') format('truetype');
+}
+
+/* FontChineseSimplified */
+@font-face {
+    font-family: 'FontChineseSimplified';
+    src: url('%2') format('truetype');
+}
+
+/* FontExtendedChineseSimplified */
+@font-face {
+    font-family: 'FontExtendedChineseSimplified';
+    src: url('%3') format('truetype');
+}
+
+/* FontChineseTraditional */
+@font-face {
+    font-family: 'FontChineseTraditional';
+    src: url('%4') format('truetype');
+}
+
+/* FontKorean */
+@font-face {
+    font-family: 'FontKorean';
+    src: url('%5') format('truetype');
+}
+
+/* FontNintendoExtended */
+@font-face {
+    font-family: 'NintendoExt003';
+    src: url('%6') format('truetype');
+}
+
+/* FontNintendoExtended2 */
+@font-face {
+    font-family: 'NintendoExt003';
+    src: url('%7') format('truetype');
+}
+`;
+
+    document.head.appendChild(css);
+})();
+)";
+
+constexpr char LOAD_NX_FONT[] = R"(
+(function() {
+    var elements = document.querySelectorAll("*");
+
+    for (var i = 0; i < elements.length; i++) {
+        var style = window.getComputedStyle(elements[i], null);
+        if (style.fontFamily.includes("Arial") || style.fontFamily.includes("Calibri") ||
+            style.fontFamily.includes("Century") || style.fontFamily.includes("Times New Roman")) {
+            elements[i].style.fontFamily = "FontStandard, FontChineseSimplified, FontExtendedChineseSimplified, FontChineseTraditional, FontKorean, NintendoExt003";
+        } else {
+            elements[i].style.fontFamily = style.fontFamily + ", FontStandard, FontChineseSimplified, FontExtendedChineseSimplified, FontChineseTraditional, FontKorean, NintendoExt003";
+        }
+    }
+})();
+)";
+
+constexpr char GAMEPAD_SCRIPT[] = R"(
+window.addEventListener("gamepadconnected", function(e) {
+    console.log("Gamepad connected at index %d: %s. %d buttons, %d axes.",
+        e.gamepad.index, e.gamepad.id, e.gamepad.buttons.length, e.gamepad.axes.length);
+});
+
+window.addEventListener("gamepaddisconnected", function(e) {
+    console.log("Gamepad disconnected from index %d: %s", e.gamepad.index, e.gamepad.id);
+});
+)";
+
+constexpr char WINDOW_NX_SCRIPT[] = R"(
+var end_applet = false;
+var yuzu_key_callbacks = [];
+
+(function() {
+    class WindowNX {
+        constructor() {
+            yuzu_key_callbacks[1] = function() { window.history.back(); };
+            yuzu_key_callbacks[2] = function() { window.nx.endApplet(); };
+        }
+
+        addEventListener(type, listener, options) {
+            console.log("nx.addEventListener called, type=%s", type);
+
+            window.addEventListener(type, listener, options);
+        }
+
+        endApplet() {
+            console.log("nx.endApplet called");
+
+            end_applet = true;
+        }
+
+        playSystemSe(system_se) {
+            console.log("nx.playSystemSe is not implemented, system_se=%s", system_se);
+        }
+
+        sendMessage(message) {
+            console.log("nx.sendMessage is not implemented, message=%s", message);
+        }
+
+        setCursorScrollSpeed(scroll_speed) {
+            console.log("nx.setCursorScrollSpeed is not implemented, scroll_speed=%d", scroll_speed);
+        }
+    }
+
+    class WindowNXFooter {
+        setAssign(key, label, func, option) {
+            console.log("nx.footer.setAssign called, key=%s", key);
+
+            switch (key) {
+                case "A":
+                    yuzu_key_callbacks[0] = func;
+                    break;
+                case "B":
+                    yuzu_key_callbacks[1] = func;
+                    break;
+                case "X":
+                    yuzu_key_callbacks[2] = func;
+                    break;
+                case "Y":
+                    yuzu_key_callbacks[3] = func;
+                    break;
+                case "L":
+                    yuzu_key_callbacks[6] = func;
+                    break;
+                case "R":
+                    yuzu_key_callbacks[7] = func;
+                    break;
+            }
+        }
+
+        setFixed(kind) {
+            console.log("nx.footer.setFixed is not implemented, kind=%s", kind);
+        }
+
+        unsetAssign(key) {
+            console.log("nx.footer.unsetAssign called, key=%s", key);
+
+            switch (key) {
+                case "A":
+                    yuzu_key_callbacks[0] = function() {};
+                    break;
+                case "B":
+                    yuzu_key_callbacks[1] = function() {};
+                    break;
+                case "X":
+                    yuzu_key_callbacks[2] = function() {};
+                    break;
+                case "Y":
+                    yuzu_key_callbacks[3] = function() {};
+                    break;
+                case "L":
+                    yuzu_key_callbacks[6] = function() {};
+                    break;
+                case "R":
+                    yuzu_key_callbacks[7] = function() {};
+                    break;
+            }
+        }
+    }
+
+    class WindowNXPlayReport {
+        incrementCounter(counter_id) {
+            console.log("nx.playReport.incrementCounter is not implemented, counter_id=%d", counter_id);
+        }
+
+        setCounterSetIdentifier(counter_id) {
+            console.log("nx.playReport.setCounterSetIdentifier is not implemented, counter_id=%d", counter_id);
+        }
+    }
+
+    window.nx = new WindowNX();
+    window.nx.footer = new WindowNXFooter();
+    window.nx.playReport = new WindowNXPlayReport();
+})();
+)";

src/yuzu/bootmanager.cpp

@@ -569,6 +569,10 @@ void GRenderWindow::CaptureScreenshot(u32 res_scale, const QString& screenshot_p
         layout);
 }
 
+bool GRenderWindow::IsLoadingComplete() const {
+    return first_frame;
+}
+
 void GRenderWindow::OnMinimalClientAreaChangeRequest(std::pair<u32, u32> minimal_size) {
     setMinimumSize(minimal_size.first, minimal_size.second);
 }

src/yuzu/bootmanager.h

@@ -162,6 +162,8 @@ public:
     /// Destroy the previous run's child_widget which should also destroy the child_window
     void ReleaseRenderTarget();
 
+    bool IsLoadingComplete() const;
+
     void CaptureScreenshot(u32 res_scale, const QString& screenshot_path);
 
     std::pair<u32, u32> ScaleTouch(const QPointF& pos) const;

src/yuzu/main.cpp

@@ -28,8 +28,6 @@
 #include "core/hle/service/am/applet_ae.h"
 #include "core/hle/service/am/applet_oe.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.
@@ -125,14 +123,6 @@ 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
@@ -190,6 +180,30 @@ static void InitializeLogging() {
 #endif
 }
 
+static void RemoveCachedContents() {
+    const auto offline_fonts = Common::FS::SanitizePath(
+        fmt::format("{}/fonts", Common::FS::GetUserPath(Common::FS::UserPath::CacheDir)),
+        Common::FS::DirectorySeparator::PlatformDefault);
+
+    const auto offline_manual = Common::FS::SanitizePath(
+        fmt::format("{}/offline_web_applet_manual",
+                    Common::FS::GetUserPath(Common::FS::UserPath::CacheDir)),
+        Common::FS::DirectorySeparator::PlatformDefault);
+    const auto offline_legal_information = Common::FS::SanitizePath(
+        fmt::format("{}/offline_web_applet_legal_information",
+                    Common::FS::GetUserPath(Common::FS::UserPath::CacheDir)),
+        Common::FS::DirectorySeparator::PlatformDefault);
+    const auto offline_system_data = Common::FS::SanitizePath(
+        fmt::format("{}/offline_web_applet_system_data",
+                    Common::FS::GetUserPath(Common::FS::UserPath::CacheDir)),
+        Common::FS::DirectorySeparator::PlatformDefault);
+
+    Common::FS::DeleteDirRecursively(offline_fonts);
+    Common::FS::DeleteDirRecursively(offline_manual);
+    Common::FS::DeleteDirRecursively(offline_legal_information);
+    Common::FS::DeleteDirRecursively(offline_system_data);
+}
+
 GMainWindow::GMainWindow()
     : input_subsystem{std::make_shared<InputCommon::InputSubsystem>()},
       config{std::make_unique<Config>()}, vfs{std::make_shared<FileSys::RealVfsFilesystem>()},
@@ -258,6 +272,9 @@ GMainWindow::GMainWindow()
         FileSys::ContentProviderUnionSlot::FrontendManual, provider.get());
     Core::System::GetInstance().GetFileSystemController().CreateFactories(*vfs);
 
+    // Remove cached contents generated during the previous session
+    RemoveCachedContents();
+
     // Gen keys if necessary
     OnReinitializeKeys(ReinitializeKeyBehavior::NoWarning);
 
@@ -349,151 +366,142 @@ void GMainWindow::SoftwareKeyboardInvokeCheckDialog(std::u16string error_message
     emit SoftwareKeyboardFinishedCheckDialog();
 }
 
+void GMainWindow::WebBrowserOpenWebPage(std::string_view main_url, std::string_view additional_args,
+                                        bool is_local) {
 #ifdef YUZU_USE_QT_WEB_ENGINE
 
-void GMainWindow::WebBrowserOpenPage(std::string_view filename, std::string_view additional_args) {
-    NXInputWebEngineView web_browser_view(this);
+    if (disable_web_applet) {
+        emit WebBrowserClosed(Service::AM::Applets::WebExitReason::WindowClosed,
+                              "http://localhost/");
+        return;
+    }
+
+    QtNXWebEngineView web_browser_view(this, Core::System::GetInstance(), input_subsystem.get());
+
+    ui.action_Pause->setEnabled(false);
+    ui.action_Restart->setEnabled(false);
+    ui.action_Stop->setEnabled(false);
 
-    // Scope to contain the QProgressDialog for initialization
     {
-        QProgressDialog progress(this);
-        progress.setMinimumDuration(200);
-        progress.setLabelText(tr("Loading Web Applet..."));
-        progress.setRange(0, 4);
-        progress.setValue(0);
-        progress.show();
+        QProgressDialog loading_progress(this);
+        loading_progress.setLabelText(tr("Loading Web Applet..."));
+        loading_progress.setRange(0, 3);
+        loading_progress.setValue(0);
 
-        auto future = QtConcurrent::run([this] { emit WebBrowserUnpackRomFS(); });
+        if (is_local && !Common::FS::Exists(std::string(main_url))) {
+            loading_progress.show();
 
-        while (!future.isFinished())
-            QApplication::processEvents();
+            auto future = QtConcurrent::run([this] { emit WebBrowserExtractOfflineRomFS(); });
 
-        progress.setValue(1);
+            while (!future.isFinished()) {
+                QCoreApplication::processEvents();
+            }
+        }
 
-        // 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(QStringLiteral("nx_inject.js"));
-        nx_shim.setInjectionPoint(QWebEngineScript::DocumentCreation);
-        nx_shim.setRunsOnSubFrames(true);
-        web_browser_view.page()->profile()->scripts()->insert(nx_shim);
+        loading_progress.setValue(1);
 
-        web_browser_view.load(
-            QUrl(QUrl::fromLocalFile(QString::fromStdString(std::string(filename))).toString() +
-                 QString::fromStdString(std::string(additional_args))));
+        if (is_local) {
+            web_browser_view.LoadLocalWebPage(main_url, additional_args);
+        } else {
+            web_browser_view.LoadExternalWebPage(main_url, additional_args);
+        }
 
-        progress.setValue(2);
-
-        render_window->hide();
-        web_browser_view.setFocus();
+        if (render_window->IsLoadingComplete()) {
+            render_window->hide();
+        }
 
         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);
+                                       static_cast<qreal>(Layout::ScreenUndocked::Width));
 
+        web_browser_view.setFocus();
         web_browser_view.show();
 
-        progress.setValue(3);
+        loading_progress.setValue(2);
 
-        QApplication::processEvents();
+        QCoreApplication::processEvents();
 
-        progress.setValue(4);
+        loading_progress.setValue(3);
     }
 
-    bool finished = false;
-    QAction* exit_action = new QAction(tr("Exit Web Applet"), this);
-    connect(exit_action, &QAction::triggered, this, [&finished] { finished = true; });
+    bool exit_check = false;
+
+    // TODO (Morph): Remove this
+    QAction* exit_action = new QAction(tr("Disable Web Applet"), this);
+    connect(exit_action, &QAction::triggered, this, [this, &web_browser_view] {
+        const auto result = QMessageBox::warning(
+            this, tr("Disable Web Applet"),
+            tr("Disabling the web applet will cause it to not be shown again for the rest of the "
+               "emulated session. This can lead to undefined behavior and should only be used with "
+               "Super Mario 3D All-Stars. Are you sure you want to disable the web applet?"),
+            QMessageBox::Yes | QMessageBox::No);
+        if (result == QMessageBox::Yes) {
+            disable_web_applet = true;
+            web_browser_view.SetFinished(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);
+    while (!web_browser_view.IsFinished()) {
+        QCoreApplication::processEvents();
 
-    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(key_code));
-    };
+        if (!exit_check) {
+            web_browser_view.page()->runJavaScript(
+                QStringLiteral("end_applet;"), [&](const QVariant& variant) {
+                    exit_check = false;
+                    if (variant.toBool()) {
+                        web_browser_view.SetFinished(true);
+                        web_browser_view.SetExitReason(
+                            Service::AM::Applets::WebExitReason::EndButtonPressed);
+                    }
+                });
 
-    QMessageBox::information(
-        this, tr("Exit"),
-        tr("To exit the web application, use the game provided controls to select exit, select the "
-           "'Exit Web Applet' option in the menu bar, or press the 'Enter' key."));
-
-    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;
+            exit_check = true;
         }
 
-        const auto input = npad.GetAndResetPressState();
-        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 (web_browser_view.GetCurrentURL().contains(QStringLiteral("localhost"))) {
+            if (!web_browser_view.IsFinished()) {
+                web_browser_view.SetFinished(true);
+                web_browser_view.SetExitReason(Service::AM::Applets::WebExitReason::CallbackURL);
             }
+
+            web_browser_view.SetLastURL(web_browser_view.GetCurrentURL().toStdString());
         }
 
-        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
+        std::this_thread::sleep_for(std::chrono::milliseconds(1));
     }
 
+    const auto exit_reason = web_browser_view.GetExitReason();
+    const auto last_url = web_browser_view.GetLastURL();
+
     web_browser_view.hide();
-    render_window->show();
+
     render_window->setFocus();
+
+    if (render_window->IsLoadingComplete()) {
+        render_window->show();
+    }
+
+    ui.action_Pause->setEnabled(true);
+    ui.action_Restart->setEnabled(true);
+    ui.action_Stop->setEnabled(true);
+
     ui.menubar->removeAction(exit_action);
 
-    // Needed to update render window focus/show and remove menubar action
-    QApplication::processEvents();
-    emit WebBrowserFinishedBrowsing();
-}
+    QCoreApplication::processEvents();
+
+    emit WebBrowserClosed(exit_reason, last_url);
 
 #else
 
-void GMainWindow::WebBrowserOpenPage(std::string_view filename, std::string_view additional_args) {
-#ifndef __linux__
-    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);
+    // Utilize the same fallback as the default web browser applet.
+    emit WebBrowserClosed(Service::AM::Applets::WebExitReason::WindowClosed, "http://localhost/");
+
 #endif
-
-    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);
@@ -993,7 +1001,6 @@ bool GMainWindow::LoadROM(const QString& filename, std::size_t program_index) {
 
     system.SetAppletFrontendSet({
         std::make_unique<QtControllerSelector>(*this), // Controller Selector
-        nullptr,                                       // E-Commerce
         std::make_unique<QtErrorDisplay>(*this),       // Error Display
         nullptr,                                       // Parental Controls
         nullptr,                                       // Photo Viewer
@@ -2102,6 +2109,7 @@ void GMainWindow::OnStartGame() {
     qRegisterMetaType<std::string>("std::string");
     qRegisterMetaType<std::optional<std::u16string>>("std::optional<std::u16string>");
     qRegisterMetaType<std::string_view>("std::string_view");
+    qRegisterMetaType<Service::AM::Applets::WebExitReason>("Service::AM::Applets::WebExitReason");
 
     connect(emu_thread.get(), &EmuThread::ErrorThrown, this, &GMainWindow::OnCoreError);
 

src/yuzu/main.h

@@ -55,6 +55,10 @@ namespace InputCommon {
 class InputSubsystem;
 }
 
+namespace Service::AM::Applets {
+enum class WebExitReason : u32;
+}
+
 enum class EmulatedDirectoryTarget {
     NAND,
     SDMC,
@@ -126,8 +130,8 @@ signals:
     void SoftwareKeyboardFinishedText(std::optional<std::u16string> text);
     void SoftwareKeyboardFinishedCheckDialog();
 
-    void WebBrowserUnpackRomFS();
-    void WebBrowserFinishedBrowsing();
+    void WebBrowserExtractOfflineRomFS();
+    void WebBrowserClosed(Service::AM::Applets::WebExitReason exit_reason, std::string last_url);
 
 public slots:
     void OnLoadComplete();
@@ -138,7 +142,8 @@ 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);
+    void WebBrowserOpenWebPage(std::string_view main_url, std::string_view additional_args,
+                               bool is_local);
     void OnAppFocusStateChanged(Qt::ApplicationState state);
 
 private:
@@ -321,6 +326,9 @@ private:
     // Last game booted, used for multi-process apps
     QString last_filename_booted;
 
+    // Disables the web applet for the rest of the emulated session
+    bool disable_web_applet{};
+
 protected:
     void dropEvent(QDropEvent* event) override;
     void dragEnterEvent(QDragEnterEvent* event) override;

src/yuzu/util/url_request_interceptor.cpp

@@ -0,0 +1,32 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#ifdef YUZU_USE_QT_WEB_ENGINE
+
+#include "yuzu/util/url_request_interceptor.h"
+
+UrlRequestInterceptor::UrlRequestInterceptor(QObject* p) : QWebEngineUrlRequestInterceptor(p) {}
+
+UrlRequestInterceptor::~UrlRequestInterceptor() = default;
+
+void UrlRequestInterceptor::interceptRequest(QWebEngineUrlRequestInfo& info) {
+    const auto resource_type = info.resourceType();
+
+    switch (resource_type) {
+    case QWebEngineUrlRequestInfo::ResourceTypeMainFrame:
+        requested_url = info.requestUrl();
+        emit FrameChanged();
+        break;
+    case QWebEngineUrlRequestInfo::ResourceTypeSubFrame:
+    case QWebEngineUrlRequestInfo::ResourceTypeXhr:
+        emit FrameChanged();
+        break;
+    }
+}
+
+QUrl UrlRequestInterceptor::GetRequestedURL() const {
+    return requested_url;
+}
+
+#endif

src/yuzu/util/url_request_interceptor.h

@@ -0,0 +1,30 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#ifdef YUZU_USE_QT_WEB_ENGINE
+
+#include <QObject>
+#include <QWebEngineUrlRequestInterceptor>
+
+class UrlRequestInterceptor : public QWebEngineUrlRequestInterceptor {
+    Q_OBJECT
+
+public:
+    explicit UrlRequestInterceptor(QObject* p = nullptr);
+    ~UrlRequestInterceptor() override;
+
+    void interceptRequest(QWebEngineUrlRequestInfo& info) override;
+
+    QUrl GetRequestedURL() const;
+
+signals:
+    void FrameChanged();
+
+private:
+    QUrl requested_url;
+};
+
+#endif