fixes for navigation and button detection in SMO action guide

src/yuzu/applets/qt_web_browser.cpp

@@ -102,6 +102,18 @@ QtNXWebEngineView::~QtNXWebEngineView() {
     StopInputThread();
 }
 
+void QtNXWebEngineView::highlightFirstLink() {
+
+    QWebEngineScript highlight_element;
+
+    highlight_element.setName(QStringLiteral("highlight_element.js"));
+    highlight_element.setSourceCode(QString::fromStdString("document.getElementsByTagName(\"a\")[0].focus();"));
+    highlight_element.setWorldId(QWebEngineScript::MainWorld);
+    highlight_element.setInjectionPoint(QWebEngineScript::Deferred);
+    highlight_element.setRunsOnSubFrames(true);
+    default_profile->scripts()->insert(highlight_element);
+}
+
 void QtNXWebEngineView::LoadLocalWebPage(const std::string& main_url,
                                          const std::string& additional_args) {
     is_local = true;
@@ -112,6 +124,7 @@ void QtNXWebEngineView::LoadLocalWebPage(const std::string& main_url,
     SetExitReason(Service::AM::Applets::WebExitReason::EndButtonPressed);
     SetLastURL("http://localhost/");
     StartInputThread();
+    highlightFirstLink();
 
     load(QUrl(QUrl::fromLocalFile(QString::fromStdString(main_url)).toString() +
               QString::fromStdString(additional_args)));
@@ -128,6 +141,8 @@ void QtNXWebEngineView::LoadExternalWebPage(const std::string& main_url,
     StartInputThread();
 
     load(QUrl(QString::fromStdString(main_url) + QString::fromStdString(additional_args)));
+
+    highlightFirstLink();
 }
 
 void QtNXWebEngineView::SetUserAgent(UserAgent user_agent) {
@@ -206,11 +221,12 @@ template <HIDButton... T>
 void QtNXWebEngineView::HandleWindowFooterButtonPressedOnce() {
     const auto f = [this](HIDButton button) {
         if (input_interpreter->IsButtonPressedOnce(button)) {
+            int btn = (int)button; // button's getting changed somewhere so save the value
             page()->runJavaScript(
                 QStringLiteral("yuzu_key_callbacks[%1] == null;").arg(static_cast<u8>(button)),
                 [&](const QVariant& variant) {
                     if (variant.toBool()) {
-                        switch (button) {
+                        switch ((HIDButton)btn) { // to use here
                         case HIDButton::A:
                             SendMultipleKeyPressEvents<Qt::Key_A, Qt::Key_Space, Qt::Key_Return>();
                             break;

src/yuzu/applets/qt_web_browser.h

@@ -161,6 +161,9 @@ private:
     /// Loads the extracted fonts using JavaScript.
     void LoadExtractedFonts();
 
+    /// Focuses input on the first available link to permit controller input on linux.
+    void highlightFirstLink();
+
     InputCommon::InputSubsystem* input_subsystem;
 
     std::unique_ptr<UrlRequestInterceptor> url_interceptor;