From cbef6b1fca457b1a36df17c758eee94684020d6e Mon Sep 17 00:00:00 2001
From: Morph <39850852+Morph1984@users.noreply.github.com>
Date: Mon, 4 Jul 2022 05:39:27 -0400
Subject: [PATCH] qt_web_browser: Fix button inputs with QtWebEngine

Button inputs were broken as button was assumed to be the bit position of NpadButton prior to the input rewrite. Since this was changed to use NpadButton directly, we should count the number of trailing zeros to determine the bit position.
---
 src/yuzu/applets/qt_web_browser.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/yuzu/applets/qt_web_browser.cpp b/src/yuzu/applets/qt_web_browser.cpp
index 790edbb2a2..89bd482e00 100644
--- a/src/yuzu/applets/qt_web_browser.cpp
+++ b/src/yuzu/applets/qt_web_browser.cpp
@@ -2,6 +2,8 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #ifdef YUZU_USE_QT_WEB_ENGINE
+#include <bit>
+
 #include <QApplication>
 #include <QKeyEvent>
 
@@ -211,8 +213,10 @@ template <Core::HID::NpadButton... T>
 void QtNXWebEngineView::HandleWindowFooterButtonPressedOnce() {
     const auto f = [this](Core::HID::NpadButton button) {
         if (input_interpreter->IsButtonPressedOnce(button)) {
+            const auto button_index = std::countr_zero(static_cast<u64>(button));
+
             page()->runJavaScript(
-                QStringLiteral("yuzu_key_callbacks[%1] == null;").arg(static_cast<u8>(button)),
+                QStringLiteral("yuzu_key_callbacks[%1] == null;").arg(button_index),
                 [this, button](const QVariant& variant) {
                     if (variant.toBool()) {
                         switch (button) {
@@ -236,7 +240,7 @@ void QtNXWebEngineView::HandleWindowFooterButtonPressedOnce() {
 
             page()->runJavaScript(
                 QStringLiteral("if (yuzu_key_callbacks[%1] != null) { yuzu_key_callbacks[%1](); }")
-                    .arg(static_cast<u8>(button)));
+                    .arg(button_index));
         }
     };