Added Language setting and localization wrapper

plugins/libimhex/source/helpers/lang.cpp

@@ -0,0 +1,87 @@
+#include "hex/helpers/lang.hpp"
+
+#include "hex/helpers/shared_data.hpp"
+
+#include <nlohmann/json.hpp>
+#include <filesystem>
+#include <fstream>
+
+namespace hex {
+
+    LangEntry::LangEntry(const char *unlocalizedString) : m_unlocalizedString(unlocalizedString) { }
+
+    LangEntry::operator std::string() const {
+        return std::string(get());
+    }
+
+    LangEntry::operator std::string_view() const {
+        return get();
+    }
+
+    LangEntry::operator const char*() const {
+        return get().data();
+    }
+
+    std::string_view LangEntry::get() const {
+        auto &lang = SharedData::loadedLanguage;
+        if (lang.find(this->m_unlocalizedString) != lang.end())
+            return lang[this->m_unlocalizedString];
+        else
+            return this->m_unlocalizedString;
+    }
+
+    void LangEntry::loadLanguage(std::string_view language) {
+        SharedData::loadedLanguage.clear();
+
+        bool isDefaultLanguage = language == "en-US";
+
+        try {
+            std::ifstream languageFile("lang/" + std::string(language) + ".json");
+            nlohmann::json languageJson;
+
+            if (!languageFile.is_open() && !isDefaultLanguage)
+                languageFile.open("lang/en-US.json");
+
+            languageFile >> languageJson;
+
+            for (auto &[unlocalizedString, localizedString] : languageJson["lang"].items())
+                SharedData::loadedLanguage.insert({ unlocalizedString, localizedString });
+
+            if (!isDefaultLanguage) {
+                languageFile.open("lang/en-US.json");
+                if (!languageFile.good())
+                    return;
+
+                languageFile >> languageJson;
+
+                for (auto &[unlocalizedString, localizedString] : languageJson["lang"].items())
+                    SharedData::loadedLanguage.insert({ unlocalizedString, localizedString });
+            }
+        } catch (std::exception &e) {
+            printf("Language load error: %s\n", e.what());
+
+            if (!isDefaultLanguage)
+                loadLanguage("en-US");
+        }
+
+    }
+
+    const std::map<std::string, std::string>& LangEntry::getSupportedLanguages() {
+        static std::map<std::string, std::string> languages;
+
+        if (languages.empty()) {
+            for (auto &entry : std::filesystem::directory_iterator("lang")) {
+                try {
+                    std::ifstream file(entry.path());
+                    nlohmann::json json;
+                    file >> json;
+
+                    languages.insert({ json["name"].get<std::string>(), entry.path().stem().string() });
+                } catch (std::exception &e) {}
+            }
+        }
+
+        return languages;
+    }
+
+}

plugins/libimhex/source/helpers/shared_data.cpp

@@ -17,6 +17,7 @@ namespace hex {
     u32 SharedData::patternPaletteOffset;
     std::string SharedData::errorPopupMessage;
     std::list<ImHexApi::Bookmarks::Entry> SharedData::bookmarkEntries;
+    std::map<std::string, std::string> SharedData::loadedLanguage;
 
     imgui_addons::ImGuiFileBrowser SharedData::fileBrowser;
     imgui_addons::ImGuiFileBrowser::DialogMode SharedData::fileBrowserDialogMode;