void LocalizationService::UpdateFontFamilyAndSize()

in src/CalcViewModel/Common/LocalizationService.cpp [268:371]
100 lines of code
14 McCabe index (conditional complexity)

void LocalizationService::UpdateFontFamilyAndSize(DependencyObject ^ target)
{
    FontFamily ^ fontFamily;
    FontWeight fontWeight;
    bool fOverrideFontWeight = false;
    double scaleFactor;

    auto service = LocalizationService::GetInstance();
    auto fontType = LocalizationService::GetFontType(target);

    if (service->GetOverrideFontApiValues())
    {
        fontFamily = ref new FontFamily(service->GetFontFamilyOverride());
        scaleFactor = service->GetFontScaleFactorOverride(fontType) / 100.0;
        fontWeight = service->GetFontWeightOverride();
        fOverrideFontWeight = true;
    }
    else
    {
        auto languageFont = service->GetLanguageFont(fontType);
        fontFamily = ref new FontFamily(languageFont->FontFamily);
        scaleFactor = languageFont->ScaleFactor / 100.0;
    }

    double sizeToUse = LocalizationService::GetFontSize(target) * scaleFactor;

    auto control = dynamic_cast<Control ^>(target);
    if (control)
    {
        control->FontFamily = fontFamily;
        if (fOverrideFontWeight)
        {
            control->FontWeight = fontWeight;
        }
        if (sizeToUse != 0.0)
        {
            control->FontSize = sizeToUse;
        }
        else
        {
            control->ClearValue(Control::FontSizeProperty);
        }
    }
    else
    {
        auto textBlock = dynamic_cast<TextBlock ^>(target);
        if (textBlock)
        {
            textBlock->FontFamily = fontFamily;
            if (fOverrideFontWeight)
            {
                textBlock->FontWeight = fontWeight;
            }
            if (sizeToUse != 0.0)
            {
                textBlock->FontSize = sizeToUse;
            }
            else
            {
                textBlock->ClearValue(TextBlock::FontSizeProperty);
            }
        }
        else
        {
            RichTextBlock ^ richTextBlock = dynamic_cast<RichTextBlock ^>(target);
            if (richTextBlock)
            {
                richTextBlock->FontFamily = fontFamily;
                if (fOverrideFontWeight)
                {
                    richTextBlock->FontWeight = fontWeight;
                }
                if (sizeToUse != 0.0)
                {
                    richTextBlock->FontSize = sizeToUse;
                }
                else
                {
                    richTextBlock->ClearValue(RichTextBlock::FontSizeProperty);
                }
            }
            else
            {
                TextElement ^ textElement = dynamic_cast<TextElement ^>(target);
                if (textElement)
                {
                    textElement->FontFamily = fontFamily;
                    if (fOverrideFontWeight)
                    {
                        textElement->FontWeight = fontWeight;
                    }
                    if (sizeToUse != 0.0)
                    {
                        textElement->FontSize = sizeToUse;
                    }
                    else
                    {
                        textElement->ClearValue(TextElement::FontSizeProperty);
                    }
                }
            }
        }
    }
}