axmol/core/ui/UITextFieldEx.cpp

//
// Copyright (c) 2014-2022 @HALX99 - All Rights Reserved
//
#ifndef _UITEXTFIELD_CPP_H_
#define _UITEXTFIELD_CPP_H_
#include "UITextFieldEx.h"

#include "base/CCDirector.h"

/// cocos2d singleton objects
#define CCDIRECTOR axis::Director::getInstance()
#define CCRUNONGL CCDIRECTOR->getScheduler()->performFunctionInCocosThread
#define CCEVENTMGR CCDIRECTOR->getEventDispatcher()
#define CCSCHTASKS CCDIRECTOR->getScheduler()
#define CCACTIONMGR CCDIRECTOR->getActionManager()
#define CCFILEUTILS axis::FileUtils::getInstance()
#define CCAUDIO axis::SimpleAudioEngine::getInstance()
#define CCAPP axis::CCApplication::getInstance()

NS_AX_BEGIN

#ifdef _WIN32
#    define nxbeep(t) MessageBeep(t)
#else
#    define nxbeep(t)
#endif

static Label* createLabel(std::string_view text,
                          std::string_view font,
                          float fontSize,
                          const Vec2& dimensions    = Vec2::ZERO,
                          TextHAlignment hAlignment = TextHAlignment::LEFT,
                          TextVAlignment vAlignment = TextVAlignment::TOP)
{
    if (FileUtils::getInstance()->isFileExist(font))
    {
        return Label::createWithTTF(text, font, fontSize, dimensions, hAlignment, vAlignment);
    }
    else
    {
        return Label::createWithSystemFont(text, font, fontSize, dimensions, hAlignment, vAlignment);
    }
}

static bool engine_inj_checkVisibility(Node* theNode)
{
    // AX_ASSERT(theNode != NULL);
    bool visible = false;
    for (Node* ptr = theNode; (ptr != nullptr && (visible = ptr->isVisible())); ptr = ptr->getParent())
        ;
    return visible;
}

static bool engine_inj_containsTouchPoint(axis::Node* target, axis::Touch* touch)
{
    assert(target != nullptr);

    axis::Point pt = target->convertTouchToNodeSpace(touch);

    const Vec2& size = target->getContentSize();

    axis::Rect rc(0, 0, size.width, size.height);

    bool contains = (rc.containsPoint(pt));

    // CCLOG("check %#x coordinate:(%f, %f), contains:%d", target, pt.x, pt.y, contains);
    return contains;
}

static bool engine_inj_containsPoint(axis::Node* target, const axis::Vec2& worldPoint)
{
    axis::Point pt = target->convertToNodeSpace(worldPoint);

    const Vec2& size = target->getContentSize();

    axis::Rect rc(0, 0, size.width, size.height);

    bool contains = (rc.containsPoint(pt));

    // CCLOG("check %#x coordinate:(%f, %f), contains:%d", target, pt.x, pt.y, contains);
    return contains;
}

static uint32_t engine_inj_c4b2dw(const Color4B& value)
{
    auto rvalue = (uint32_t)value.a << 24 | (uint32_t)value.b << 16 | (uint32_t)value.g << 8 | (uint32_t)value.r;
    return rvalue;
}

static Sprite* engine_inj_create_lump(const Color4B& color, int height, int width)
{
    unsigned int* pixels((unsigned int*)malloc(height * width * sizeof(unsigned int)));

    // Fill Pixels
    uint32_t* ptr           = pixels;
    const Color4B fillColor = Color4B::WHITE;
    for (int i = 0; i < height * width; ++i)
    {
        ptr[i] = engine_inj_c4b2dw(fillColor);  // 0xffffffff;
    }

    // create cursor by pixels
    Texture2D* texture = new Texture2D();

    texture->initWithData(pixels, height * width * sizeof(unsigned int), backend::PixelFormat::RGBA8, width, height);

    auto cursor = Sprite::createWithTexture(texture);

    cursor->setColor(Color3B(color));
    cursor->setOpacity(color.a);

    texture->release();

    free(pixels);

    return cursor;
}

namespace ui
{

/// calculate the UTF-8 string's char count.
static int _calcCharCount(const char* text)
{
    int n   = 0;
    char ch = 0;
    while ((ch = *text) != 0x0)
    {
        AX_BREAK_IF(!ch);

        if (0x80 != (0xC0 & ch))
        {
            ++n;
        }
        ++text;
    }
    return n;
}

/// calculate the UTF-8 string's char count.
static int _truncateUTF8String(const char* text, int limit, int& nb)
{
    int n   = 0;
    char ch = 0;
    nb      = 0;
    while ((ch = *text) != 0x0)
    {
        AX_BREAK_IF(!ch || n > limit);

        if (0x80 != (0xC0 & ch))
        {
            ++n;
        }
        ++nb;
        ++text;
    }
    return n;
}

static void internalSetLableFont(Label* l, std::string_view fontName, float fontSize)
{
    if (FileUtils::getInstance()->isFileExist(fontName))
    {
        TTFConfig config    = l->getTTFConfig();
        config.fontFilePath = fontName;
        config.fontSize     = fontSize;
        l->setTTFConfig(config);
    }
    else
    {
        l->setSystemFontName(fontName);
        l->requestSystemFontRefresh();
        l->setSystemFontSize(fontSize);
    }
}

static float internalCalcStringWidth(std::string_view s, std::string_view fontName, float fontSize)
{
    auto label = createLabel(std::string{s}, fontName, fontSize);
    return label->getContentSize().width;
}

static std::string internalUTF8MoveLeft(std::string_view utf8Text, int length /* default utf8Text.length() */)
{
    if (!utf8Text.empty() && length > 0)
    {

        // get the delete byte number
        int deleteLen = 1;  // default, erase 1 byte

        while (length >= deleteLen && 0x80 == (0xC0 & utf8Text.at(length - deleteLen)))
        {
            ++deleteLen;
        }

        return std::string{utf8Text.data(), static_cast<size_t>(length - deleteLen)};
    }
    else
    {
        return std::string{utf8Text};
    }
}

static std::string internalUTF8MoveRight(std::string_view utf8Text, int length /* default utf8Text.length() */)
{
    if (!utf8Text.empty() && length >= 0)
    {

        // get the delete byte number
        size_t addLen = 1;  // default, erase 1 byte

        while ((length + addLen) < utf8Text.size() && 0x80 == (0xC0 & utf8Text.at(length + addLen)))
        {
            ++addLen;
        }

        return std::string{utf8Text.data(), static_cast<size_t>(length + addLen)};
    }
    else
    {
        return std::string{utf8Text};
    }
}

//////////////////////////////////////////////////////////////////////////
// constructor and destructor
//////////////////////////////////////////////////////////////////////////
bool TextFieldEx::s_keyboardVisible = false;
TextFieldEx::TextFieldEx()
    : editable(true)
    , renderLabel(nullptr)
    , charCount(0)
    , inputText("")
    , placeHolder("")
    , colorText(Color4B::WHITE)
    , colorSpaceHolder(Color4B::GRAY)
    , secureTextEntry(false)
    , cursor(nullptr)
    , enabled(true)
    , touchListener(nullptr)
    , kbdListener(nullptr)
    , onTextModify(nullptr)
    , onOpenIME(nullptr)
    , onCloseIME(nullptr)
    , charLimit(std::numeric_limits<int>::max())
    , systemFontUsed(false)
    , fontSize(24)
    , insertPosUtf8(0)
    , insertPos(0)
    , cursorPos(0)
    , touchCursorControlEnabled(true)
    , cursorVisible(false)
    , _continuousTouchDelayTimerID(nullptr)
    , _continuousTouchDelayTime(0.6)
{}

TextFieldEx::~TextFieldEx()
{
    if (this->kbdListener != nullptr)
        CCEVENTMGR->removeEventListener(this->kbdListener);
    if (this->touchListener != nullptr)
        CCEVENTMGR->removeEventListener(this->touchListener);
}

//////////////////////////////////////////////////////////////////////////
// static constructor
//////////////////////////////////////////////////////////////////////////
TextFieldEx* TextFieldEx::create(std::string_view placeholder,
                                 std::string_view fontName,
                                 float fontSize,
                                 float cursorWidth,
                                 const Color4B& cursorColor)
{
    TextFieldEx* ret = new TextFieldEx();
    if (ret && ret->initWithPlaceHolder("", fontName, fontSize, cursorWidth, cursorColor))
    {
        ret->autorelease();
        if (placeholder.size() > 0)
        {
            ret->setPlaceholderText(placeholder);
        }
        return ret;
    }
    AX_SAFE_DELETE(ret);
    return nullptr;
}

//////////////////////////////////////////////////////////////////////////
// initialize
//////////////////////////////////////////////////////////////////////////
bool TextFieldEx::initWithPlaceHolder(std::string_view placeholder,
                                      std::string_view fontName,
                                      float fontSize,
                                      float cursorWidth,
                                      const Color4B& cursorColor)
{
    this->placeHolder = placeholder;

    this->renderLabel =
        createLabel(placeholder, fontName, fontSize, Vec2::ZERO, TextHAlignment::CENTER, TextVAlignment::CENTER);
    this->renderLabel->setAnchorPoint(Point::ANCHOR_MIDDLE_LEFT);
    this->addChild(this->renderLabel);

    CCRUNONGL([this] { renderLabel->setPosition(Point(0, this->getContentSize().height / 2)); });

    __initCursor(fontSize, cursorWidth, cursorColor);

    this->fontName       = fontName;
    this->fontSize       = fontSize;
    this->systemFontUsed = !FileUtils::getInstance()->isFileExist(fontName);

    return true;
}

std::string_view TextFieldEx::getTextFontName() const
{
    return this->fontName;
}

void TextFieldEx::setTextFontName(std::string_view fontName)
{
    if (FileUtils::getInstance()->isFileExist(fontName))
    {
        TTFConfig config    = renderLabel->getTTFConfig();
        config.fontFilePath = fontName;
        config.fontSize     = this->fontSize;
        renderLabel->setTTFConfig(config);
        systemFontUsed = false;
        _fontType      = 1;
    }
    else
    {
        renderLabel->setSystemFontName(fontName);
        if (!systemFontUsed)
        {
            renderLabel->requestSystemFontRefresh();
        }
        renderLabel->setSystemFontSize(this->fontSize);
        systemFontUsed = true;
        _fontType      = 0;
    }
    this->fontName = fontName;

    using namespace std::string_view_literals;
    this->asteriskWidth = internalCalcStringWidth("*"sv, this->fontName, this->fontSize);
}

void TextFieldEx::setTextFontSize(float size)
{
    if (this->systemFontUsed)
    {
        renderLabel->setSystemFontSize(size);
    }
    else
    {
        TTFConfig config = renderLabel->getTTFConfig();
        config.fontSize  = size;
        renderLabel->setTTFConfig(config);
    }

    this->fontSize = size;

    using namespace std::string_view_literals;
    this->asteriskWidth = internalCalcStringWidth("*"sv, this->fontName, this->fontSize);
}

float TextFieldEx::getTextFontSize() const
{
    return this->fontSize;
}

void TextFieldEx::enableIME(Node* control)
{
    if (touchListener != nullptr)
    {
        return;
    }
    touchListener = EventListenerTouchOneByOne::create();

    if (control == nullptr)
        control = this;

    touchListener->onTouchBegan = [=](Touch* touch, Event*) {
        bool focus = (engine_inj_checkVisibility(this) && this->editable && this->enabled &&
                      engine_inj_containsTouchPoint(control, touch));

        if (this->_continuousTouchDelayTimerID != nullptr)
        {
            stimer::kill(this->_continuousTouchDelayTimerID);
            this->_continuousTouchDelayTimerID = nullptr;
        }

        if (focus && this->cursorVisible)
        {
            auto worldPoint = touch->getLocation();
            if (this->_continuousTouchCallback)
            {
                this->_continuousTouchDelayTimerID = stimer::delay(
                    this->_continuousTouchDelayTime, [=]() { this->_continuousTouchCallback(worldPoint); });
            }
        }
        return true;
    };
    touchListener->onTouchEnded = [control, this](Touch* touch, Event* e) {
        if (this->_continuousTouchDelayTimerID != nullptr)
        {
            stimer::kill(this->_continuousTouchDelayTimerID);
            this->_continuousTouchDelayTimerID = nullptr;
        }

        bool focus = (engine_inj_checkVisibility(this) && this->editable && this->enabled &&
                      engine_inj_containsTouchPoint(control, touch));

        if (focus)
        {
            if (!s_keyboardVisible || !this->cursorVisible)
                openIME();
            if (this->touchCursorControlEnabled)
            {
                auto renderLabelPoint = renderLabel->convertToNodeSpace(touch->getLocation());
                __moveCursorTo(renderLabelPoint.x);
            }
        }
        else
        {
            closeIME();
        }
    };

    CCEVENTMGR->addEventListenerWithSceneGraphPriority(touchListener, this);

    /// enable use keyboard <- -> to move cursor.
    kbdListener               = EventListenerKeyboard::create();
    kbdListener->onKeyPressed = [this](EventKeyboard::KeyCode code, Event*) {
        if (this->cursorVisible)
        {
            switch (code)
            {
            case EventKeyboard::KeyCode::KEY_LEFT_ARROW:
                this->__moveCursor(-1);
                break;
            case EventKeyboard::KeyCode::KEY_RIGHT_ARROW:
                this->__moveCursor(1);
                break;
            case EventKeyboard::KeyCode::KEY_DELETE:
            case EventKeyboard::KeyCode::KEY_KP_DELETE:
                this->handleDeleteKeyEvent();
                break;
            default:;
            }
        }
    };

    CCEVENTMGR->addEventListenerWithSceneGraphPriority(kbdListener, this);
}

void TextFieldEx::disableIME(void)
{
    CCEVENTMGR->removeEventListener(kbdListener);
    CCEVENTMGR->removeEventListener(touchListener);

    kbdListener   = nullptr;
    touchListener = nullptr;
    closeIME();
}

Label* TextFieldEx::getRenderLabel()
{
    return this->renderLabel;
}

//////////////////////////////////////////////////////////////////////////
// IMEDelegate
//////////////////////////////////////////////////////////////////////////

bool TextFieldEx::attachWithIME()
{
    bool ret = IMEDelegate::attachWithIME();
    if (ret)
    {
        // open keyboard
        GLView* pGlView = _director->getOpenGLView();
        if (pGlView)
        {
            pGlView->setIMEKeyboardState(true);
        }
    }
    return ret;
}

bool TextFieldEx::detachWithIME()
{
    bool ret = IMEDelegate::detachWithIME();
    if (ret)
    {
        // close keyboard
        GLView* glView = _director->getOpenGLView();
        if (glView)
        {
            glView->setIMEKeyboardState(false);
        }
    }
    return ret;
}

void TextFieldEx::keyboardDidShow(IMEKeyboardNotificationInfo& /*info*/)
{
    s_keyboardVisible = true;
}

void TextFieldEx::keyboardDidHide(IMEKeyboardNotificationInfo& /*info*/)
{
    s_keyboardVisible = false;
}

void TextFieldEx::openIME(void)
{
    CCLOG("TextFieldEx:: openIME");
    this->attachWithIME();
    __updateCursorPosition();
    __showCursor();

    if (this->onOpenIME)
        this->onOpenIME();
}

void TextFieldEx::closeIME(void)
{
    CCLOG("TextFieldEx:: closeIME");
    __hideCursor();
    this->detachWithIME();

    if (this->onCloseIME)
        this->onCloseIME();
}

bool TextFieldEx::canAttachWithIME()
{
    return true;  //(_delegate) ? (! _delegate->onTextFieldAttachWithIME(this)) : true;
}

bool TextFieldEx::canDetachWithIME()
{
    return true;  //(_delegate) ? (! _delegate->onTextFieldDetachWithIME(this)) : true;
}

void TextFieldEx::insertText(const char* text, size_t len)
{
    if (!this->editable || !this->enabled)
    {
        return;
    }

    if (this->charLimit > 0 && this->charCount >= this->charLimit)
    {  // regard zero as unlimited
        nxbeep(0);
        return;
    }

    int nb;
    auto n = _truncateUTF8String(text, this->charLimit - this->charCount, nb);

    std::string insert(text, nb);

    // insert \n means input end
    auto pos = insert.find('\n');
    if (insert.npos != pos)
    {
        len = pos;
        insert.erase(pos);
    }

    if (len > 0)
    {
        // if (_delegate && _delegate->onTextFieldInsertText(this, insert.c_str(), len))
        //{
        //     // delegate doesn't want to insert text
        //     return;
        // }

        charCount += n;  // _calcCharCount(insert.c_str());
        std::string sText(inputText);
        sText.insert(this->insertPos, insert);  // original is: sText.append(insert);

        // bool needUpdatePos
        this->setString(sText);
        while (n-- > 0)
            __moveCursor(1);

        // this->contentDirty = true;
        // __updateCursorPosition();

        if (this->onTextModify)
            this->onTextModify();
    }

    if (insert.npos == pos)
    {
        return;
    }

    // '\n' inserted, let delegate process first
    /*if (_delegate && _delegate->onTextFieldInsertText(this, "\n", 1))
    {
    return;
    }*/

    // if delegate hasn't processed, detach from IME by default
    this->closeIME();
}

void TextFieldEx::deleteBackward()
{
    if (!this->editable || !this->enabled || 0 == this->charCount)
    {
        nxbeep(0);
        return;
    }

    size_t len = inputText.length();
    if (0 == len || insertPos == 0)
    {
        nxbeep(0);
        // there is no string
        // __updateCursorPosition();
        return;
    }

    // get the delete byte number
    size_t deleteLen = 1;  // default, erase 1 byte

    while (0x80 == (0xC0 & inputText.at(insertPos - deleteLen)))
    {
        ++deleteLen;
    }

    // if (_delegate && _delegate->onTextFieldDeleteBackward(this, _inputText.c_str() + len - deleteLen,
    // static_cast<int>(deleteLen)))
    //{
    //     // delegate doesn't wan't to delete backwards
    //     return;
    // }

    // if all text deleted, show placeholder string
    if (len <= deleteLen)
    {
        __moveCursor(-1);

        this->inputText.clear();
        this->charCount = 0;
        this->renderLabel->setTextColor(colorSpaceHolder);
        this->renderLabel->setString(placeHolder);

        // __updateCursorPosition();

        // this->contentDirty = true;

        if (this->onTextModify)
            this->onTextModify();
        return;
    }

    // set new input text
    std::string text = inputText;  // (inputText.c_str(), len - deleteLen);
    text.erase(insertPos - deleteLen, deleteLen);

    __moveCursor(-1);

    this->setString(text);

    //__updateCursorPosition();
    // __moveCursor(-1);

    if (this->onTextModify)
        this->onTextModify();
}

void TextFieldEx::handleDeleteKeyEvent()
{
    if (!this->editable || !this->enabled || 0 == this->charCount)
    {
        nxbeep(0);
        return;
    }

    size_t len = inputText.length();
    if (0 == len || insertPosUtf8 == this->charCount)
    {
        nxbeep(0);
        // there is no string
        // __updateCursorPosition();
        return;
    }

    // get the delete byte number
    size_t deleteLen = 1;  // default, erase 1 byte

    while ((inputText.length() > insertPos + deleteLen) && 0x80 == (0xC0 & inputText.at(insertPos + deleteLen)))
    {
        ++deleteLen;
    }

    // if (_delegate && _delegate->onTextFieldDeleteBackward(this, _inputText.c_str() + len - deleteLen,
    // static_cast<int>(deleteLen)))
    //{
    //     // delegate doesn't wan't to delete backwards
    //     return;
    // }

    // if all text deleted, show placeholder string
    if (len <= deleteLen)
    {
        this->inputText.clear();
        this->charCount = 0;
        this->renderLabel->setTextColor(colorSpaceHolder);
        this->renderLabel->setString(placeHolder);

        __updateCursorPosition();

        // this->contentDirty = true;

        if (this->onTextModify)
            this->onTextModify();
        return;
    }

    // set new input text
    std::string text = inputText;  // (inputText.c_str(), len - deleteLen);
    text.erase(insertPos, deleteLen);

    // __moveCursor(-1);

    this->setString(text);

    if (this->onTextModify)
        this->onTextModify();
}

std::string_view TextFieldEx::getContentText()
{
    return inputText;
}

void TextFieldEx::setTextColor(const Color4B& color)
{
    colorText = color;
    if (!this->inputText.empty())
        this->renderLabel->setTextColor(colorText);
}

const Color4B& TextFieldEx::getTextColor(void) const
{
    return colorText;
}

void TextFieldEx::setCursorColor(const Color3B& color)
{
    this->cursor->setColor(color);
}

const Color3B& TextFieldEx::getCursorColor(void) const
{
    return this->cursor->getColor();
}

const Color4B& TextFieldEx::getPlaceholderColor() const
{
    return colorSpaceHolder;
}

void TextFieldEx::setPlaceholderColor(const Color4B& color)
{
    colorSpaceHolder = color;
    if (this->inputText.empty())
        this->renderLabel->setTextColor(color);
}

//////////////////////////////////////////////////////////////////////////
// properties
//////////////////////////////////////////////////////////////////////////

// input text property
void TextFieldEx::setString(std::string_view text)
{
    static char bulletString[] = {(char)0xe2, (char)0x80, (char)0xa2, (char)0x00};

    this->inputText = text;

    std::string secureText;

    std::string* displayText = &this->inputText;

    if (!this->inputText.empty())
    {
        if (secureTextEntry)
        {
            size_t length = inputText.length();
            displayText   = &secureText;

            while (length > 0)
            {
                displayText->append(bulletString);
                --length;
            }
        }
    }

    // if there is no input text, display placeholder instead
    if (this->inputText.empty())
    {
        renderLabel->setTextColor(colorSpaceHolder);
        renderLabel->setString(placeHolder);
    }
    else
    {
        renderLabel->setTextColor(colorText);
        renderLabel->setString(*displayText);
    }

    bool bInsertAtEnd = (insertPosUtf8 == charCount);

    charCount = _calcCharCount(inputText.c_str());

    if (bInsertAtEnd)
    {
        insertPosUtf8 = charCount;
        insertPos     = inputText.length();
        cursorPos     = displayText->length();
    }
}

void TextFieldEx::updateContentSize(void)
{
    this->setContentSize(renderLabel->getContentSize());
}

std::string_view TextFieldEx::getString() const
{
    return inputText;
}

// place holder text property
void TextFieldEx::setPlaceholderText(std::string_view text)
{
    placeHolder = text;
    if (inputText.empty())
    {
        renderLabel->setTextColor(colorSpaceHolder);
        renderLabel->setString(placeHolder);
    }
}

std::string_view TextFieldEx::getPlaceholderText() const
{
    return placeHolder;
}

// secureTextEntry
void TextFieldEx::setPasswordEnabled(bool value)
{
    if (secureTextEntry != value)
    {
        secureTextEntry = value;
        this->setString(this->getString());
        __updateCursorPosition();
    }
}

bool TextFieldEx::isPasswordEnabled() const
{
    return secureTextEntry;
}

const Vec2& TextFieldEx::getContentSize() const
{
    // const_cast<TextFieldEx*>(this)->setContentSize(renderLabel->getContentSize());
    return Node::getContentSize();
}

void TextFieldEx::setEnabled(bool bEnabled)
{
    if (this->enabled != bEnabled)
    {
        if (!bEnabled)
        {
            this->closeIME();
        }
        this->enabled = bEnabled;
    }
}

bool TextFieldEx::isEnabled(void) const
{
    return this->enabled;
}

int TextFieldEx::getFontType() const
{
    return _fontType;
}

void TextFieldEx::__initCursor(int height, int width, const Color4B& color)
{
    this->cursor = engine_inj_create_lump(Color4B(color), height, width);

    this->addChild(this->cursor);

    this->cursor->setPosition(Point(0, this->getContentSize().height / 2));
    // nodes_layout::setNodeLB(this->cursor, axis::Point::ZERO);

    /*CCAction* blink = CCRepeatForever::create(
        (CCActionInterval *)CCSequence::create(CCFadeOut::create(0.25f),
        CCFadeIn::create(0.25f),
        NULL));*/

    __hideCursor();

    __updateCursorPosition();
}

void TextFieldEx::__showCursor(void)
{
    if (this->cursor)
    {
        this->cursorVisible = true;
        this->cursor->setVisible(true);
        this->cursor->runAction(RepeatForever::create(Blink::create(1, 1)));
    }
}

void TextFieldEx::__hideCursor(void)
{
    if (this->cursor)
    {
        this->cursor->setVisible(false);
        this->cursorVisible = false;
        this->cursor->stopAllActions();
    }
}

void TextFieldEx::__updateCursorPosition(void)
{
    if (this->cursor && this->insertPosUtf8 == this->charCount)
    {
        if (0 == this->getCharCount())
        {
            this->cursor->setPosition(Point(0, this->getContentSize().height / 2));
        }
        else
        {
            this->cursor->setPosition(Point(renderLabel->getContentSize().width, this->getContentSize().height / 2));
        }
    }
}

void TextFieldEx::__moveCursor(int direction)
{
    /*bool checkSupport = this->renderLabel->getLetter(0) != nullptr;
    if (!checkSupport)
    {
        MessageBeep(MB_ICONHAND);
        return;
    }*/

    auto newOffset = this->insertPosUtf8 + direction;

    if (newOffset > 0 && newOffset <= this->charCount)
    {

        std::string_view displayText;
        if (!secureTextEntry)
            displayText = this->getString();
        else if (!this->inputText.empty())
            displayText = renderLabel->getString();

        if (direction < 0)
        {
            this->insertPos = internalUTF8MoveLeft(this->inputText, this->insertPos).size();

            auto s = internalUTF8MoveLeft(displayText, this->cursorPos);

            auto width = internalCalcStringWidth(s, this->fontName, this->fontSize);
            this->cursor->setPosition(Point(width, this->getContentSize().height / 2));
            this->cursorPos = s.length();
        }
        else
        {
            this->insertPos = internalUTF8MoveRight(this->inputText, this->insertPos).size();

            auto s     = internalUTF8MoveRight(displayText, this->cursorPos);
            auto width = internalCalcStringWidth(s, this->fontName, this->fontSize);
            this->cursor->setPosition(Point(width, this->getContentSize().height / 2));
            this->cursorPos = s.length();
        }

        this->insertPosUtf8 = newOffset;
    }
    else if (newOffset == 0)
    {
        this->cursor->setPosition(Point(0, this->getContentSize().height / 2));
        this->insertPosUtf8 = newOffset;
        this->insertPos     = 0;
        this->cursorPos     = 0;
    }
    else
    {
        // MessageBeep(0);
    }
}

void TextFieldEx::__moveCursorTo(float x)
{  // test
    // normalized x
    float normalizedX = 0;

    std::string_view displayText;
    if (!secureTextEntry)
    {
        displayText = this->inputText;
    }
    else
    {
        if (!this->inputText.empty())
        {
            displayText = renderLabel->getString();
        }
    }

    int length = displayText.length();
    int n      = this->charCount;  // UTF8 char counter

    int insertWhere     = 0;
    int insertWhereUtf8 = 0;
    while (length > 0)
    {
        auto checkX = internalCalcStringWidth(displayText, this->fontName, this->fontSize);
        if (x >= checkX)
        {
            insertWhere     = length;
            insertWhereUtf8 = n;
            normalizedX     = checkX;
            break;
        }

        // clamp backward
        size_t backwardLen = 1;  // default, erase 1 byte
        while (0x80 == (0xC0 & displayText.at(displayText.length() - backwardLen)))
        {
            ++backwardLen;
        }

        --n;
        displayText.remove_suffix(backwardLen);

        length -= backwardLen;
    }

    this->insertPos     = !this->secureTextEntry ? insertWhere : insertWhereUtf8;
    this->cursorPos     = insertWhere;
    this->insertPosUtf8 = insertWhereUtf8;
    this->cursor->setPosition(Point(normalizedX, this->getContentSize().height / 2));
}
};  // namespace ui

NS_AX_END

#endif