citra_qt/applets/swkbd: QtKeyboard and misc fixes

* Addressed comments and removed the applet interface

* swkbd: address @lioncash's comments

* core: more fixes

** Moved registered_swkbd to System

** Removed an usused virtual

** Removed functionality of DrawScreenKeyboard

** Removed src/core/settings.h change

* swkbd: address @lioncash's 2nd review

* swkbd: update logging macro

* QtKeyboard: Make dialog modal and hide help

src/citra_qt/CMakeLists.txt

@@ -7,6 +7,8 @@ add_executable(citra-qt
     Info.plist
     aboutdialog.cpp
     aboutdialog.h
+    applets/swkbd.cpp
+    applets/swkbd.h
     bootmanager.cpp
     bootmanager.h
     camera/camera_util.cpp

src/citra_qt/applets/swkbd.cpp

@@ -0,0 +1,127 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QDialogButtonBox>
+#include <QLabel>
+#include <QLineEdit>
+#include <QMessageBox>
+#include <QString>
+#include <QVBoxLayout>
+#include "citra_qt/applets/swkbd.h"
+
+QtKeyboardValidator::QtKeyboardValidator(QtKeyboard* keyboard_) : keyboard(keyboard_) {}
+
+QtKeyboardValidator::State QtKeyboardValidator::validate(QString& input, int& pos) const {
+    if (keyboard->ValidateFilters(input.toStdString()) == Frontend::ValidationError::None) {
+        return State::Acceptable;
+    } else {
+        return State::Invalid;
+    }
+}
+
+QtKeyboardDialog::QtKeyboardDialog(QWidget* parent, QtKeyboard* keyboard_)
+    : QDialog(parent), keyboard(keyboard_) {
+    using namespace Frontend;
+    KeyboardConfig config = keyboard->config;
+    layout = new QVBoxLayout;
+    label = new QLabel(QString::fromStdString(config.hint_text));
+    line_edit = new QLineEdit;
+    line_edit->setValidator(new QtKeyboardValidator(keyboard));
+    buttons = new QDialogButtonBox;
+    // Initialize buttons
+    switch (config.button_config) {
+    case ButtonConfig::Triple:
+        buttons->addButton(config.has_custom_button_text
+                               ? QString::fromStdString(config.button_text[2])
+                               : tr(BUTTON_OKAY),
+                           QDialogButtonBox::ButtonRole::AcceptRole);
+        buttons->addButton(config.has_custom_button_text
+                               ? QString::fromStdString(config.button_text[1])
+                               : tr(BUTTON_FORGOT),
+                           QDialogButtonBox::ButtonRole::HelpRole);
+        buttons->addButton(config.has_custom_button_text
+                               ? QString::fromStdString(config.button_text[0])
+                               : tr(BUTTON_CANCEL),
+                           QDialogButtonBox::ButtonRole::RejectRole);
+        break;
+    case ButtonConfig::Dual:
+        buttons->addButton(config.has_custom_button_text
+                               ? QString::fromStdString(config.button_text[1])
+                               : tr(BUTTON_OKAY),
+                           QDialogButtonBox::ButtonRole::AcceptRole);
+        buttons->addButton(config.has_custom_button_text
+                               ? QString::fromStdString(config.button_text[0])
+                               : tr(BUTTON_CANCEL),
+                           QDialogButtonBox::ButtonRole::RejectRole);
+        break;
+    case ButtonConfig::Single:
+        buttons->addButton(config.has_custom_button_text
+                               ? QString::fromStdString(config.button_text[0])
+                               : tr(BUTTON_OKAY),
+                           QDialogButtonBox::ButtonRole::AcceptRole);
+        break;
+    case ButtonConfig::None:
+        break;
+    }
+    connect(buttons, &QDialogButtonBox::accepted, this, [=] { Submit(); });
+    connect(buttons, &QDialogButtonBox::rejected, this, [=] {
+        button = QtKeyboard::cancel_id;
+        accept();
+    });
+    connect(buttons, &QDialogButtonBox::helpRequested, this, [=] {
+        button = QtKeyboard::forgot_id;
+        accept();
+    });
+    layout->addWidget(label);
+    layout->addWidget(line_edit);
+    layout->addWidget(buttons);
+    setLayout(layout);
+}
+
+void QtKeyboardDialog::Submit() {
+    auto error = keyboard->ValidateInput(line_edit->text().toStdString());
+    if (error != Frontend::ValidationError::None) {
+        HandleValidationError(error);
+    } else {
+        button = keyboard->ok_id;
+        text = line_edit->text();
+        accept();
+    }
+}
+
+void QtKeyboardDialog::HandleValidationError(Frontend::ValidationError error) {
+    using namespace Frontend;
+    const std::unordered_map<ValidationError, QString> VALIDATION_ERROR_MESSAGES = {
+        {ValidationError::FixedLengthRequired,
+         tr("Text length is not correct (should be %1 characters)")
+             .arg(keyboard->config.max_text_length)},
+        {ValidationError::MaxLengthExceeded,
+         tr("Text is too long (should be no more than %1 characters)")
+             .arg(keyboard->config.max_text_length)},
+        {ValidationError::BlankInputNotAllowed, tr("Blank input is not allowed")},
+        {ValidationError::EmptyInputNotAllowed, tr("Empty input is not allowed")},
+    };
+    QMessageBox::critical(this, tr("Validation error"), VALIDATION_ERROR_MESSAGES.at(error));
+}
+
+QtKeyboard::QtKeyboard(QWidget& parent_) : parent(parent_) {}
+
+void QtKeyboard::Setup(const Frontend::KeyboardConfig* config) {
+    SoftwareKeyboard::Setup(config);
+    if (this->config.button_config != Frontend::ButtonConfig::None) {
+        ok_id = static_cast<u8>(this->config.button_config);
+    }
+    QMetaObject::invokeMethod(this, "OpenInputDialog", Qt::BlockingQueuedConnection);
+}
+
+void QtKeyboard::OpenInputDialog() {
+    QtKeyboardDialog dialog(&parent, this);
+    dialog.setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint |
+                          Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint);
+    dialog.setWindowModality(Qt::WindowModal);
+    dialog.exec();
+    LOG_INFO(Frontend, "SWKBD input dialog finished, text={}, button={}", dialog.text.toStdString(),
+             dialog.button);
+    Finalize(dialog.text.toStdString(), dialog.button);
+}

src/citra_qt/applets/swkbd.h

@@ -0,0 +1,65 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QDialog>
+#include <QValidator>
+#include "core/frontend/applets/swkbd.h"
+
+class QDialogButtonBox;
+class QLabel;
+class QLineEdit;
+class QVBoxLayout;
+class QtKeyboard;
+
+class QtKeyboardValidator final : public QValidator {
+public:
+    explicit QtKeyboardValidator(QtKeyboard* keyboard);
+    State validate(QString& input, int& pos) const override;
+
+private:
+    QtKeyboard* keyboard;
+};
+
+class QtKeyboardDialog final : public QDialog {
+    Q_OBJECT
+
+public:
+    QtKeyboardDialog(QWidget* parent, QtKeyboard* keyboard);
+    void Submit();
+
+private:
+    void HandleValidationError(Frontend::ValidationError error);
+    QDialogButtonBox* buttons;
+    QLabel* label;
+    QLineEdit* line_edit;
+    QVBoxLayout* layout;
+    QtKeyboard* keyboard;
+    QString text;
+    u8 button;
+
+    friend class QtKeyboard;
+};
+
+class QtKeyboard final : public QObject, public Frontend::SoftwareKeyboard {
+    Q_OBJECT
+
+public:
+    explicit QtKeyboard(QWidget& parent);
+    void Setup(const Frontend::KeyboardConfig* config) override;
+
+private:
+    Q_INVOKABLE void OpenInputDialog();
+
+    /// Index of the buttons
+    u8 ok_id;
+    static constexpr u8 forgot_id = 1;
+    static constexpr u8 cancel_id = 0;
+
+    QWidget& parent;
+
+    friend class QtKeyboardDialog;
+    friend class QtKeyboardValidator;
+};

src/citra_qt/main.cpp

@@ -16,6 +16,7 @@
 #include <QtGui>
 #include <QtWidgets>
 #include "citra_qt/aboutdialog.h"
+#include "citra_qt/applets/swkbd.h"
 #include "citra_qt/bootmanager.h"
 #include "citra_qt/camera/qt_multimedia_camera.h"
 #include "citra_qt/camera/still_image_camera.h"
@@ -1470,6 +1471,7 @@ int main(int argc, char* argv[]) {
 
     // Register frontend applets
     Frontend::RegisterDefaultApplets();
+    Frontend::RegisterSoftwareKeyboard(std::make_shared<QtKeyboard>(main_window));
 
     main_window.show();
     return app.exec();

src/core/CMakeLists.txt

@@ -70,8 +70,6 @@ add_library(core STATIC
     file_sys/title_metadata.h
     frontend/applets/default_applets.cpp
     frontend/applets/default_applets.h
-    frontend/applets/interface.cpp
-    frontend/applets/interface.h
     frontend/applets/swkbd.cpp
     frontend/applets/swkbd.h
     frontend/camera/blank_camera.cpp

src/core/core.cpp

@@ -199,6 +199,10 @@ const Service::SM::ServiceManager& System::ServiceManager() const {
     return *service_manager;
 }
 
+void System::RegisterSoftwareKeyboard(std::shared_ptr<Frontend::SoftwareKeyboard> swkbd) {
+    registered_swkbd = std::move(swkbd);
+}
+
 void System::Shutdown() {
     // Log last frame performance stats
     auto perf_results = GetAndResetPerfStats();

src/core/core.h

@@ -7,6 +7,7 @@
 #include <memory>
 #include <string>
 #include "common/common_types.h"
+#include "core/frontend/applets/swkbd.h"
 #include "core/loader/loader.h"
 #include "core/memory.h"
 #include "core/perf_stats.h"
@@ -150,6 +151,14 @@ public:
         return *app_loader;
     }
 
+    /// Frontend Applets
+
+    void RegisterSoftwareKeyboard(std::shared_ptr<Frontend::SoftwareKeyboard> swkbd);
+
+    std::shared_ptr<Frontend::SoftwareKeyboard> GetSoftwareKeyboard() const {
+        return registered_swkbd;
+    }
+
 private:
     /**
      * Initialize the emulated system.
@@ -180,6 +189,9 @@ private:
     /// Service manager
     std::shared_ptr<Service::SM::ServiceManager> service_manager;
 
+    /// Frontend applets
+    std::shared_ptr<Frontend::SoftwareKeyboard> registered_swkbd;
+
     static System s_instance;
 
     ResultStatus status = ResultStatus::Success;

src/core/frontend/applets/default_applets.cpp

@@ -3,11 +3,10 @@
 // Refer to the license.txt file included.
 
 #include "core/frontend/applets/default_applets.h"
-#include "core/frontend/applets/interface.h"
 #include "core/frontend/applets/swkbd.h"
 
 namespace Frontend {
 void RegisterDefaultApplets() {
-    RegisterFrontendApplet(std::make_shared<DefaultCitraKeyboard>(), AppletType::SoftwareKeyboard);
+    RegisterSoftwareKeyboard(std::make_shared<DefaultCitraKeyboard>());
 }
 } // namespace Frontend

src/core/frontend/applets/interface.cpp

@@ -1,24 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <unordered_map>
-#include "core/frontend/applets/interface.h"
-
-namespace Frontend {
-
-std::unordered_map<AppletType, std::shared_ptr<AppletInterface>> registered_applets;
-
-void RegisterFrontendApplet(std::shared_ptr<AppletInterface> applet, AppletType type) {
-    registered_applets[type] = applet;
-}
-
-void UnregisterFrontendApplet(AppletType type) {
-    registered_applets.erase(type);
-}
-
-std::shared_ptr<AppletInterface> GetRegisteredApplet(AppletType type) {
-    return registered_applets.at(type);
-}
-
-} // namespace Frontend

src/core/frontend/applets/interface.h

@@ -1,67 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <atomic>
-#include <memory>
-
-namespace Frontend {
-
-enum class AppletType {
-    SoftwareKeyboard,
-};
-
-class AppletConfig {};
-class AppletData {};
-
-// TODO(jroweboy) add ability to draw to framebuffer
-class AppletInterface {
-public:
-    virtual ~AppletInterface() = default;
-
-    /**
-     * On applet start, the applet specific configuration will be passed in along with the
-     * framebuffer.
-     */
-    virtual void Setup(const AppletConfig*) = 0;
-
-    /**
-     * Checked every update to see if the applet is still running. When the applet is done, the core
-     * will call ReceiveData
-     */
-    virtual bool IsRunning() {
-        return running;
-    }
-
-    /**
-     * Called by the core to receive the result data of this applet.
-     * Frontend implementation **should** block until the data is ready.
-     */
-    virtual const AppletData* ReceiveData() = 0;
-
-protected:
-    std::atomic<bool> running = false;
-};
-
-/**
- * Frontends call this method to pass a frontend applet implementation to the core. If the core
- * already has a applet registered, then this replaces the old applet
- *
- * @param applet - Frontend Applet implementation that the HLE applet code will launch
- * @param type - Which type of applet
- */
-void RegisterFrontendApplet(std::shared_ptr<AppletInterface> applet, AppletType type);
-
-/**
- * Frontends call this to prevent future requests
- */
-void UnregisterFrontendApplet(AppletType type);
-
-/**
- * Returns the Frontend Applet for the provided type
- */
-std::shared_ptr<AppletInterface> GetRegisteredApplet(AppletType type);
-
-} // namespace Frontend

src/core/frontend/applets/swkbd.cpp

@@ -2,13 +2,16 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <algorithm>
+#include <cctype>
 #include "common/assert.h"
 #include "common/logging/log.h"
+#include "core/core.h"
 #include "core/frontend/applets/swkbd.h"
 
 namespace Frontend {
 
-ValidationError SoftwareKeyboard::ValidateFilters(const std::string& input) {
+ValidationError SoftwareKeyboard::ValidateFilters(const std::string& input) const {
     if (config.filters.prevent_digit) {
         if (std::any_of(input.begin(), input.end(),
                         [](unsigned char c) { return std::isdigit(c); })) {
@@ -41,7 +44,7 @@ ValidationError SoftwareKeyboard::ValidateFilters(const std::string& input) {
     return ValidationError::None;
 }
 
-ValidationError SoftwareKeyboard::ValidateInput(const std::string& input) {
+ValidationError SoftwareKeyboard::ValidateInput(const std::string& input) const {
     ValidationError error;
     if ((error = ValidateFilters(input)) != ValidationError::None) {
         return error;
@@ -52,11 +55,9 @@ ValidationError SoftwareKeyboard::ValidateInput(const std::string& input) {
         return ValidationError::MaxLengthExceeded;
     }
 
-    auto is_blank = [&] {
+    bool is_blank =
-        return std::all_of(input.begin(), input.end(),
+        std::all_of(input.begin(), input.end(), [](unsigned char c) { return std::isspace(c); });
-                           [](unsigned char c) { return std::isspace(c); });
+    bool is_empty = input.empty();
-    };
-    auto is_empty = [&] { return input.empty(); };
     switch (config.accept_mode) {
     case AcceptedInput::FixedLength:
         if (input.size() != config.max_text_length) {
@@ -64,20 +65,20 @@ ValidationError SoftwareKeyboard::ValidateInput(const std::string& input) {
         }
         break;
     case AcceptedInput::NotEmptyAndNotBlank:
-        if (is_blank()) {
+        if (is_blank) {
             return ValidationError::BlankInputNotAllowed;
         }
-        if (is_empty()) {
+        if (is_empty) {
             return ValidationError::EmptyInputNotAllowed;
         }
         break;
     case AcceptedInput::NotBlank:
-        if (is_blank()) {
+        if (is_blank) {
             return ValidationError::BlankInputNotAllowed;
         }
         break;
     case AcceptedInput::NotEmpty:
-        if (is_empty()) {
+        if (is_empty) {
             return ValidationError::EmptyInputNotAllowed;
         }
         break;
@@ -85,15 +86,15 @@ ValidationError SoftwareKeyboard::ValidateInput(const std::string& input) {
         return ValidationError::None;
     default:
         // TODO(jroweboy): What does hardware do in this case?
-        NGLOG_CRITICAL(Frontend, "Application requested unknown validation method. Method: {}",
+        LOG_CRITICAL(Frontend, "Application requested unknown validation method. Method: {}",
-                       static_cast<u32>(config.accept_mode));
+                     static_cast<u32>(config.accept_mode));
         UNREACHABLE();
     }
 
     return ValidationError::None;
 }
 
-ValidationError SoftwareKeyboard::ValidateButton(u8 button) {
+ValidationError SoftwareKeyboard::ValidateButton(u8 button) const {
     switch (config.button_config) {
     case ButtonConfig::None:
         return ValidationError::None;
@@ -127,7 +128,32 @@ ValidationError SoftwareKeyboard::Finalize(const std::string& text, u8 button) {
         return error;
     }
     data = {text, button};
-    running = false;
+}
+
+void DefaultCitraKeyboard::Setup(const Frontend::KeyboardConfig* config) {
+    SoftwareKeyboard::Setup(config);
+    switch (this->config.button_config) {
+    case ButtonConfig::None:
+    case ButtonConfig::Single:
+        Finalize("Citra", 0);
+        break;
+    case ButtonConfig::Dual:
+        Finalize("Citra", 1);
+        break;
+    case ButtonConfig::Triple:
+        Finalize("Citra", 2);
+        break;
+    default:
+        UNREACHABLE();
+    }
+}
+
+void RegisterSoftwareKeyboard(std::shared_ptr<SoftwareKeyboard> applet) {
+    Core::System::GetInstance().RegisterSoftwareKeyboard(applet);
+}
+
+std::shared_ptr<SoftwareKeyboard> GetRegisteredSoftwareKeyboard() {
+    return Core::System::GetInstance().GetSoftwareKeyboard();
 }
 
 } // namespace Frontend

src/core/frontend/applets/swkbd.h

@@ -4,18 +4,15 @@
 
 #pragma once
 
-#include <codecvt>
-#include <locale>
 #include <unordered_map>
 #include <utility>
 #include <vector>
 #include "common/assert.h"
-#include "core/frontend/applets/interface.h"
 
 namespace Frontend {
 
 enum class AcceptedInput {
-    Anything = 0,        /// All inputs are accepted.
+    Anything,            /// All inputs are accepted.
     NotEmpty,            /// Empty inputs are not accepted.
     NotEmptyAndNotBlank, /// Empty or blank inputs (consisting solely of whitespace) are not
                          /// accepted.
@@ -26,25 +23,20 @@ enum class AcceptedInput {
 };
 
 enum class ButtonConfig {
-    Single = 0, /// Ok button
+    Single, /// Ok button
-    Dual,       /// Cancel | Ok buttons
+    Dual,   /// Cancel | Ok buttons
-    Triple,     /// Cancel | I Forgot | Ok buttons
+    Triple, /// Cancel | I Forgot | Ok buttons
-    None,       /// No button (returned by swkbdInputText in special cases)
+    None,   /// No button (returned by swkbdInputText in special cases)
 };
 
 /// Default English button text mappings. Frontends may need to copy this to internationalize it.
-static const char* BUTTON_OKAY = "Ok";
+constexpr char BUTTON_OKAY[] = "Ok";
-static const char* BUTTON_CANCEL = "Cancel";
+constexpr char BUTTON_CANCEL[] = "Cancel";
-static const char* BUTTON_FORGOT = "I Forgot";
+constexpr char BUTTON_FORGOT[] = "I Forgot";
-static const std::unordered_map<ButtonConfig, std::vector<std::string>> DEFAULT_BUTTON_MAPPING = {
-    {ButtonConfig::Single, {BUTTON_OKAY}},
-    {ButtonConfig::Dual, {BUTTON_CANCEL, BUTTON_OKAY}},
-    {ButtonConfig::Triple, {BUTTON_CANCEL, BUTTON_FORGOT, BUTTON_OKAY}},
-};
 
 /// Configuration thats relevent to frontend implementation of applets. Anything missing that we
 /// later learn is needed can be added here and filled in by the backend HLE applet
-struct KeyboardConfig : public AppletConfig {
+struct KeyboardConfig {
     ButtonConfig button_config;
     AcceptedInput accept_mode;   /// What kinds of input are accepted (blank/empty/fixed width)
     bool multiline_mode;         /// True if the keyboard accepts multiple lines of input
@@ -61,16 +53,13 @@ struct KeyboardConfig : public AppletConfig {
         bool prevent_backslash; /// Disallow the use of the \ sign.
         bool prevent_profanity; /// Disallow profanity using Nintendo's profanity filter.
         bool enable_callback;   /// Use a callback in order to check the input.
-    } filters;
+    };
+    Filters filters;
 };
 
-class KeyboardData : public AppletData {
+struct KeyboardData {
-public:
     std::string text;
     u8 button{};
-
-    KeyboardData(std::string text, u8 button) : text(std::move(text)), button(button) {}
-    KeyboardData() = default;
 };
 
 enum class ValidationError {
@@ -91,35 +80,33 @@ enum class ValidationError {
     EmptyInputNotAllowed,
 };
 
-class SoftwareKeyboard : public AppletInterface {
+class SoftwareKeyboard {
 public:
-    explicit SoftwareKeyboard() : AppletInterface() {}
+    virtual void Setup(const KeyboardConfig* config) {
-    void Setup(const AppletConfig* config) override {
+        this->config = KeyboardConfig(*config);
-        this->config = KeyboardConfig(*static_cast<const KeyboardConfig*>(config));
     }
-    const AppletData* ReceiveData() override {
+    const KeyboardData* ReceiveData() {
         return &data;
     }
 
-protected:
     /**
      * Validates if the provided string breaks any of the filter rules. This is meant to be called
      * whenever the user input changes to check to see if the new input is valid. Frontends can
      * decide if they want to check the input continuously or once before submission
      */
-    ValidationError ValidateFilters(const std::string& input);
+    ValidationError ValidateFilters(const std::string& input) const;
 
     /**
      * Validates the the provided string doesn't break any extra rules like "input must not be
      * empty". This will be called by Finalize but can be called earlier if the frontend needs
      */
-    ValidationError ValidateInput(const std::string& input);
+    ValidationError ValidateInput(const std::string& input) const;
 
     /**
      * Verifies that the selected button is valid. This should be used as the last check before
      * closing.
      */
-    ValidationError ValidateButton(u8 button);
+    ValidationError ValidateButton(u8 button) const;
 
     /**
      * Runs all validation phases. If successful, stores the data so that the HLE applet in core can
@@ -127,29 +114,18 @@ protected:
      */
     ValidationError Finalize(const std::string& text, u8 button);
 
+protected:
     KeyboardConfig config;
     KeyboardData data;
 };
 
 class DefaultCitraKeyboard final : public SoftwareKeyboard {
 public:
-    void Setup(const AppletConfig* config) override {
+    void Setup(const KeyboardConfig* config) override;
-        SoftwareKeyboard::Setup(config);
-        switch (this->config.button_config) {
-        case ButtonConfig::None:
-        case ButtonConfig::Single:
-            Finalize("Citra", 0);
-            break;
-        case ButtonConfig::Dual:
-            Finalize("Citra", 1);
-            break;
-        case ButtonConfig::Triple:
-            Finalize("Citra", 2);
-            break;
-        default:
-            UNREACHABLE();
-        }
-    }
 };
 
+void RegisterSoftwareKeyboard(std::shared_ptr<SoftwareKeyboard> applet);
+
+std::shared_ptr<SoftwareKeyboard> GetRegisteredSoftwareKeyboard();
+
 } // namespace Frontend

src/core/hle/applets/swkbd.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <algorithm>
 #include <cstring>
 #include <string>
 #include "common/assert.h"
@@ -70,7 +71,7 @@ ResultCode SoftwareKeyboard::StartImpl(Service::APT::AppletStartupParameter cons
     DrawScreenKeyboard();
 
     using namespace Frontend;
-    frontend_applet = GetRegisteredApplet(AppletType::SoftwareKeyboard);
+    frontend_applet = GetRegisteredSoftwareKeyboard();
     if (frontend_applet) {
         KeyboardConfig frontend_config = ToFrontendConfig(config);
         frontend_applet->Setup(&frontend_config);
@@ -82,38 +83,38 @@ ResultCode SoftwareKeyboard::StartImpl(Service::APT::AppletStartupParameter cons
 
 void SoftwareKeyboard::Update() {
     using namespace Frontend;
-    KeyboardData data(*static_cast<const KeyboardData*>(frontend_applet->ReceiveData()));
+    KeyboardData data(*frontend_applet->ReceiveData());
     std::u16string text = Common::UTF8ToUTF16(data.text);
     memcpy(text_memory->GetPointer(), text.c_str(), text.length() * sizeof(char16_t));
     switch (config.num_buttons_m1) {
-    case SoftwareKeyboardButtonConfig::SINGLE_BUTTON:
+    case SoftwareKeyboardButtonConfig::SingleButton:
-        config.return_code = SoftwareKeyboardResult::D0_CLICK;
+        config.return_code = SoftwareKeyboardResult::D0Click;
         break;
-    case SoftwareKeyboardButtonConfig::DUAL_BUTTON:
+    case SoftwareKeyboardButtonConfig::DualButton:
         if (data.button == 0)
-            config.return_code = SoftwareKeyboardResult::D1_CLICK0;
+            config.return_code = SoftwareKeyboardResult::D1Click0;
         else
-            config.return_code = SoftwareKeyboardResult::D1_CLICK1;
+            config.return_code = SoftwareKeyboardResult::D1Click1;
         break;
-    case SoftwareKeyboardButtonConfig::TRIPLE_BUTTON:
+    case SoftwareKeyboardButtonConfig::TripleButton:
         if (data.button == 0)
-            config.return_code = SoftwareKeyboardResult::D2_CLICK0;
+            config.return_code = SoftwareKeyboardResult::D2Click0;
         else if (data.button == 1)
-            config.return_code = SoftwareKeyboardResult::D2_CLICK1;
+            config.return_code = SoftwareKeyboardResult::D2Click1;
         else
-            config.return_code = SoftwareKeyboardResult::D2_CLICK2;
+            config.return_code = SoftwareKeyboardResult::D2Click2;
         break;
-    case SoftwareKeyboardButtonConfig::NO_BUTTON:
+    case SoftwareKeyboardButtonConfig::NoButton:
         // TODO: find out what is actually returned
-        config.return_code = SoftwareKeyboardResult::NONE;
+        config.return_code = SoftwareKeyboardResult::None;
         break;
     default:
-        NGLOG_CRITICAL(Applet_SWKBD, "Unknown button config {}",
+        LOG_CRITICAL(Applet_SWKBD, "Unknown button config {}",
-                       static_cast<int>(config.num_buttons_m1));
+                     static_cast<int>(config.num_buttons_m1));
         UNREACHABLE();
     }
 
-    config.text_length = static_cast<u16>(text.size() + 1);
+    config.text_length = static_cast<u16>(text.size());
     config.text_offset = 0;
 
     // TODO(Subv): We're finalizing the applet immediately after it's started,
@@ -122,13 +123,7 @@ void SoftwareKeyboard::Update() {
 }
 
 void SoftwareKeyboard::DrawScreenKeyboard() {
-    auto bottom_screen = Service::GSP::GetFrameBufferInfo(0, 1);
+    // TODO(Subv): Draw the HLE keyboard, for now just do nothing
-    auto info = bottom_screen->framebuffer_info[bottom_screen->index];
-
-    // TODO(Subv): Draw the HLE keyboard, for now just zero-fill the framebuffer
-    Memory::ZeroBlock(info.address_left, info.stride * 320);
-
-    Service::GSP::SetBufferSwap(1, info);
 }
 
 void SoftwareKeyboard::Finalize() {
@@ -144,7 +139,8 @@ void SoftwareKeyboard::Finalize() {
     is_running = false;
 }
 
-Frontend::KeyboardConfig SoftwareKeyboard::ToFrontendConfig(SoftwareKeyboardConfig config) {
+Frontend::KeyboardConfig SoftwareKeyboard::ToFrontendConfig(
+    const SoftwareKeyboardConfig& config) const {
     using namespace Frontend;
     KeyboardConfig frontend_config;
     frontend_config.button_config = static_cast<ButtonConfig>(config.num_buttons_m1);
@@ -152,32 +148,33 @@ Frontend::KeyboardConfig SoftwareKeyboard::ToFrontendConfig(SoftwareKeyboardConf
     frontend_config.multiline_mode = config.multiline;
     frontend_config.max_text_length = config.max_text_length;
     frontend_config.max_digits = config.max_digits;
-    std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> convert;
+    std::u16string buffer(config.hint_text.size(), 0);
-    frontend_config.hint_text =
+    std::memcpy(buffer.data(), config.hint_text.data(), config.hint_text.size() * sizeof(u16));
-        convert.to_bytes(reinterpret_cast<const char16_t*>(config.hint_text.data()));
+    frontend_config.hint_text = Common::UTF16ToUTF8(buffer);
     frontend_config.has_custom_button_text =
-        std::all_of(config.button_text.begin(), config.button_text.end(),
+        !std::all_of(config.button_text.begin(), config.button_text.end(),
-                    [](std::array<u16, HLE::Applets::MAX_BUTTON_TEXT_LEN + 1> x) {
+                     [](std::array<u16, HLE::Applets::MAX_BUTTON_TEXT_LEN + 1> x) {
-                        return std::all_of(x.begin(), x.end(), [](u16 x) { return x == 0; });
+                         return std::all_of(x.begin(), x.end(), [](u16 x) { return x == 0; });
-                    });
+                     });
     if (frontend_config.has_custom_button_text) {
         for (const auto& text : config.button_text) {
-            frontend_config.button_text.push_back(
+            buffer.resize(text.size());
-                convert.to_bytes(reinterpret_cast<const char16_t*>(text.data())));
+            std::memcpy(buffer.data(), text.data(), text.size() * sizeof(u16));
+            frontend_config.button_text.push_back(Common::UTF16ToUTF8(buffer));
         }
     }
     frontend_config.filters.prevent_digit =
-        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::DIGITS);
+        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::Digits);
     frontend_config.filters.prevent_at =
-        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::AT);
+        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::At);
     frontend_config.filters.prevent_percent =
-        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::PERCENT);
+        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::Percent);
     frontend_config.filters.prevent_backslash =
-        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::BACKSLASH);
+        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::Backslash);
     frontend_config.filters.prevent_profanity =
-        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::PROFANITY);
+        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::Profanity);
     frontend_config.filters.enable_callback =
-        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::CALLBACK);
+        static_cast<bool>(config.filter_flags & SoftwareKeyboardFilter::Callback);
     return frontend_config;
 }
 } // namespace Applets

src/core/hle/applets/swkbd.h

@@ -27,97 +27,97 @@ constexpr int MAX_CALLBACK_MSG_LEN = 256;
 
 /// Keyboard types
 enum class SoftwareKeyboardType : u32 {
-    NORMAL = 0, ///< Normal keyboard with several pages (QWERTY/accents/symbol/mobile)
+    Normal,  ///< Normal keyboard with several pages (QWERTY/accents/symbol/mobile)
-    QWERTY,     ///< QWERTY keyboard only.
+    QWERTY,  ///< QWERTY keyboard only.
-    NUMPAD,     ///< Number pad.
+    NumPad,  ///< Number pad.
-    WESTERN,    ///< On JPN systems, a text keyboard without Japanese input capabilities,
+    Western, ///< On JPN systems, a text keyboard without Japanese input capabilities,
-                /// otherwise same as SWKBD_TYPE_NORMAL.
+             /// otherwise same as SWKBD_TYPE_NORMAL.
 };
 
 /// Keyboard dialog buttons.
 enum class SoftwareKeyboardButtonConfig : u32 {
-    SINGLE_BUTTON = 0, ///< Ok button
+    SingleButton, ///< Ok button
-    DUAL_BUTTON,       ///< Cancel | Ok buttons
+    DualButton,   ///< Cancel | Ok buttons
-    TRIPLE_BUTTON,     ///< Cancel | I Forgot | Ok buttons
+    TripleButton, ///< Cancel | I Forgot | Ok buttons
-    NO_BUTTON,         ///< No button (returned by swkbdInputText in special cases)
+    NoButton,     ///< No button (returned by swkbdInputText in special cases)
 };
 
 /// Accepted input types.
 enum class SoftwareKeyboardValidInput : u32 {
-    ANYTHING = 0,      ///< All inputs are accepted.
+    Anything,         ///< All inputs are accepted.
-    NOTEMPTY,          ///< Empty inputs are not accepted.
+    NotEmpty,         ///< Empty inputs are not accepted.
-    NOTEMPTY_NOTBLANK, ///< Empty or blank inputs (consisting solely of whitespace) are not
+    NotEmptyNotBlank, ///< Empty or blank inputs (consisting solely of whitespace) are not
-                       /// accepted.
+                      /// accepted.
-    NOTBLANK, ///< Blank inputs (consisting solely of whitespace) are not accepted, but empty
+    NotBlank, ///< Blank inputs (consisting solely of whitespace) are not accepted, but empty
               /// inputs are.
-    FIXEDLEN, ///< The input must have a fixed length (specified by maxTextLength in
+    FixedLen, ///< The input must have a fixed length (specified by maxTextLength in
               /// swkbdInit).
 };
 
 /// Keyboard password modes.
 enum class SoftwareKeyboardPasswordMode : u32 {
-    NONE = 0,   ///< Characters are not concealed.
+    None,      ///< Characters are not concealed.
-    HIDE,       ///< Characters are concealed immediately.
+    Hide,      ///< Characters are concealed immediately.
-    HIDE_DELAY, ///< Characters are concealed a second after they've been typed.
+    HideDelay, ///< Characters are concealed a second after they've been typed.
 };
 
 /// Keyboard input filtering flags. Allows the caller to specify what input is explicitly not
 /// allowed
 namespace SoftwareKeyboardFilter {
 enum Filter {
-    DIGITS = 1,         ///< Disallow the use of more than a certain number of digits (0 or more)
+    Digits = 1,         ///< Disallow the use of more than a certain number of digits (0 or more)
-    AT = 1 << 1,        ///< Disallow the use of the @ sign.
+    At = 1 << 1,        ///< Disallow the use of the @ sign.
-    PERCENT = 1 << 2,   ///< Disallow the use of the % sign.
+    Percent = 1 << 2,   ///< Disallow the use of the % sign.
-    BACKSLASH = 1 << 3, ///< Disallow the use of the \ sign.
+    Backslash = 1 << 3, ///< Disallow the use of the \ sign.
-    PROFANITY = 1 << 4, ///< Disallow profanity using Nintendo's profanity filter.
+    Profanity = 1 << 4, ///< Disallow profanity using Nintendo's profanity filter.
-    CALLBACK = 1 << 5,  ///< Use a callback in order to check the input.
+    Callback = 1 << 5,  ///< Use a callback in order to check the input.
 };
 } // namespace SoftwareKeyboardFilter
 
 /// Keyboard features.
 namespace SoftwareKeyboardFeature {
 enum Feature {
-    PARENTAL = 1,               ///< Parental PIN mode.
+    Parental = 1,             ///< Parental PIN mode.
-    DARKEN_TOP_SCREEN = 1 << 1, ///< Darken the top screen when the keyboard is shown.
+    DarkenTopScreen = 1 << 1, ///< Darken the top screen when the keyboard is shown.
-    PREDICTIVE_INPUT =
+    PredictiveInput =
-        1 << 2,           ///< Enable predictive input (necessary for Kanji input in JPN systems).
+        1 << 2,             ///< Enable predictive input (necessary for Kanji input in JPN systems).
-    MULTILINE = 1 << 3,   ///< Enable multiline input.
+    Multiline = 1 << 3,     ///< Enable multiline input.
-    FIXED_WIDTH = 1 << 4, ///< Enable fixed-width mode.
+    FixedWidth = 1 << 4,    ///< Enable fixed-width mode.
-    ALLOW_HOME = 1 << 5,  ///< Allow the usage of the HOME button.
+    AllowHome = 1 << 5,     ///< Allow the usage of the HOME button.
-    ALLOW_RESET = 1 << 6, ///< Allow the usage of a software-reset combination.
+    AllowReset = 1 << 6,    ///< Allow the usage of a software-reset combination.
-    ALLOW_POWER = 1 << 7, ///< Allow the usage of the POWER button.
+    AllowPower = 1 << 7,    ///< Allow the usage of the POWER button.
-    DEFAULT_QWERTY = 1 << 9, ///< Default to the QWERTY page when the keyboard is shown.
+    DefaultQWERTY = 1 << 9, ///< Default to the QWERTY page when the keyboard is shown.
 };
 } // namespace SoftwareKeyboardFeature
 
 /// Keyboard filter callback return values.
 enum class SoftwareKeyboardCallbackResult : u32 {
-    OK = 0,   ///< Specifies that the input is valid.
+    OK,       ///< Specifies that the input is valid.
-    CLOSE,    ///< Displays an error message, then closes the keyboard.
+    Close,    ///< Displays an error message, then closes the keyboard.
-    CONTINUE, ///< Displays an error message and continues displaying the keyboard.
+    Continue, ///< Displays an error message and continues displaying the keyboard.
 };
 
 /// Keyboard return values.
 enum class SoftwareKeyboardResult : s32 {
-    NONE = -1,          ///< Dummy/unused.
+    None = -1,         ///< Dummy/unused.
-    INVALID_INPUT = -2, ///< Invalid parameters to swkbd.
+    InvalidInput = -2, ///< Invalid parameters to swkbd.
-    OUTOFMEM = -3,      ///< Out of memory.
+    OutOfMem = -3,     ///< Out of memory.
 
-    D0_CLICK = 0, ///< The button was clicked in 1-button dialogs.
+    D0Click = 0, ///< The button was clicked in 1-button dialogs.
-    D1_CLICK0,    ///< The left button was clicked in 2-button dialogs.
+    D1Click0,    ///< The left button was clicked in 2-button dialogs.
-    D1_CLICK1,    ///< The right button was clicked in 2-button dialogs.
+    D1Click1,    ///< The right button was clicked in 2-button dialogs.
-    D2_CLICK0,    ///< The left button was clicked in 3-button dialogs.
+    D2Click0,    ///< The left button was clicked in 3-button dialogs.
-    D2_CLICK1,    ///< The middle button was clicked in 3-button dialogs.
+    D2Click1,    ///< The middle button was clicked in 3-button dialogs.
-    D2_CLICK2,    ///< The right button was clicked in 3-button dialogs.
+    D2Click2,    ///< The right button was clicked in 3-button dialogs.
 
-    HOMEPRESSED = 10, ///< The HOME button was pressed.
+    HomePressed = 10, ///< The HOME button was pressed.
-    RESETPRESSED,     ///< The soft-reset key combination was pressed.
+    ResetPressed,     ///< The soft-reset key combination was pressed.
-    POWERPRESSED,     ///< The POWER button was pressed.
+    PowerPressed,     ///< The POWER button was pressed.
 
-    PARENTAL_OK = 20, ///< The parental PIN was verified successfully.
+    ParentalOK = 20, ///< The parental PIN was verified successfully.
-    PARENTAL_FAIL,    ///< The parental PIN was incorrect.
+    ParentalFail,    ///< The parental PIN was incorrect.
 
-    BANNED_INPUT = 30, ///< The filter callback returned SoftwareKeyboardCallback::CLOSE.
+    BannedInput = 30, ///< The filter callback returned SoftwareKeyboardCallback::CLOSE.
 };
 
 struct SoftwareKeyboardConfig {
@@ -195,7 +195,7 @@ public:
     void Finalize();
 
 private:
-    Frontend::KeyboardConfig ToFrontendConfig(SoftwareKeyboardConfig config);
+    Frontend::KeyboardConfig ToFrontendConfig(const SoftwareKeyboardConfig& config) const;
 
     /// This SharedMemory will be created when we receive the LibAppJustStarted message.
     /// It holds the framebuffer info retrieved by the application with
@@ -208,7 +208,7 @@ private:
     /// Configuration of this instance of the SoftwareKeyboard, as received from the application
     SoftwareKeyboardConfig config;
 
-    std::shared_ptr<Frontend::AppletInterface> frontend_applet;
+    std::shared_ptr<Frontend::SoftwareKeyboard> frontend_applet;
 };
 } // namespace Applets
 } // namespace HLE

src/core/settings.h

@@ -96,9 +96,6 @@ struct Values {
     std::string motion_device;
     std::string touch_device;
 
-    // Frontend Devices
-    std::string applet_swkbd;
-
     // Core
     bool use_cpu_jit;