TextElement.cpp

#include "TextElement.hpp"
#include "RootDisplay.hpp"
#include <fstream>
 
const char *TextElement::fontPaths[] = {
    RAMFS "./res/fonts/OpenSans-Regular.ttf", // 0 = NORMAL
    RAMFS "./res/fonts/UbuntuMono-Regular.ttf", // 1 = MONOSPACED
    RAMFS "./res/fonts/oldmono.ttf", // 2 = OLD_MONOSPACED
    RAMFS "./res/fonts/PTSerif-Regular.ttf", // 3 = SERIF
    RAMFS "./res/fonts/NotoSansSC-Regular.ttf", // 4 = SIMPLIFIED_CHINESE
};
 
std::unordered_map<std::string, std::string> TextElement::i18nCache = {};
 
bool TextElement::useSimplifiedChineseFont = false;
 
TextElement::TextElement()
{
}
 
// static method to load i18n cache
void TextElement::loadI18nCache(std::string locale) {
    // en-us, zh-cn
    std::string localePath = RAMFS "res/i18n/" + locale + ".ini";
    std::ifstream file(localePath);
    // printf("Loading i18n cache from %s\n", localePath.c_str());
    if (file.is_open()) {
        std::string line;
        while (std::getline(file, line)) {
            size_t pos = line.find(" =");
            if (pos == std::string::npos) {
                continue; // bad format
            }
            std::string key = line.substr(0, pos);
            pos = line.find("= ");
            if (pos == std::string::npos) {
                continue;
            }
            std::string value = line.substr(pos + 2);
            TextElement::i18nCache[key] = value;
            // printf("Loaded i18n key %s with value %s\n", key.c_str(), value.c_str());
        }
        file.close();
 
        // if locale is zh-cn, we need to force the simple chinese font
        if (locale == "zh-cn") {
            printf("Overriding font choice\n");
            TextElement::useSimplifiedChineseFont = true;
        }
    }
}
 
TextElement::TextElement(std::string text, int size, CST_Color* color, int font_type, int wrapped_width)
{
    std::string sText = text;
    setText(sText);
    setSize(size);
    if (color) setColor(*color);
    setFont(font_type);
    setWrappedWidth(wrapped_width);
    update();
}
 
void TextElement::setText(const std::string& text)
{
    this->text = text;
}
 
void TextElement::setSize(int size)
{
    this->textSize = size;
}
 
void TextElement::setColor(const CST_Color& color)
{
    this->textColor = color;
}
 
void TextElement::setFont(int font_type)
{
    this->textFont = font_type;
}
 
void TextElement::setWrappedWidth(int wrapped_width)
{
    this->textWrappedWidth = wrapped_width;
}
 
void TextElement::update(bool forceUpdate)
{
    std::string key = text + std::to_string(textSize);
 
    clear();
 
    if (!loadFromCache(key) || forceUpdate)
    {
        if (TextElement::useSimplifiedChineseFont && textFont == NORMAL) {
            textFont = SIMPLIFIED_CHINESE;
        }
        auto fontPath = fontPaths[textFont % 5];
        if (customFontPath != "") {
            fontPath = customFontPath.c_str();
        }
        TTF_Font* font = TTF_OpenFont(fontPath, textSize);
 
        CST_Surface *textSurface = ((textFont == ICON) || (textWrappedWidth == 0)) ?
            TTF_RenderUTF8_Blended(font, text.c_str(), textColor) :
            TTF_RenderUTF8_Blended_Wrapped(font, text.c_str(), textColor, textWrappedWidth);
        if(textSurface==NULL) printf("TTF_GetError: %s\n", TTF_GetError());
 
        loadFromSurfaceSaveToCache(key, textSurface);
 
        CST_FreeSurface(textSurface);
        TTF_CloseFont(font);
    }
 
    getTextureSize(&width, &height);
}
 
std::string i18n(std::string key) {
    if (const auto& keyItr = TextElement::i18nCache.find(key); keyItr != TextElement::i18nCache.end()) {
        return keyItr->second;
    }
    return key;
}