Class FileSystemStd

ImGuiFileDialog.cpp:457–626

}

class FileSystemStd : public IGFD::IFileSystem {
public:
    bool IsDirectoryCanBeOpened(const std::string& vName) override {
        bool bExists = false;
        if (!vName.empty()) {
            namespace fs  = std::filesystem;
            auto pathName = stringToPath(vName);
            try {
                // interesting, in the case of a protected dir or for any reason the dir cant be opened
                // this func will work but will say nothing more . not like the dirent version
                bExists = fs::is_directory(pathName);
                // test if can be opened, this function can thrown an exception if there is an issue with this dir
                // here, the dir_iter is need else not exception is thrown..
                const auto dir_iter = fs::directory_iterator(pathName);
                (void)dir_iter;  // for avoid unused warnings
            } catch (const std::exception& /*ex*/) {
                // fail so this dir cant be opened
                bExists = false;
            }
        }
        return bExists;  // this is not a directory!
    }
    bool IsDirectoryExist(const std::string& vName) override {
        if (!vName.empty()) {
            namespace fs = std::filesystem;
            return fs::is_directory(stringToPath(vName));
        }
        return false;  // this is not a directory!
    }
    bool IsFileExist(const std::string& vName) override {
        namespace fs = std::filesystem;
        return fs::is_regular_file(stringToPath(vName));
    }
    bool CreateDirectoryIfNotExist(const std::string& vName) override {
        if (vName.empty()) return false;
        if (IsDirectoryExist(vName)) return true;

#if defined(__EMSCRIPTEN__)
        std::string str = std::string("FS.mkdir('") + vName + "');";
        emscripten_run_script(str.c_str());
        bool res = true;
#else
        namespace fs = std::filesystem;
        bool res     = fs::create_directory(stringToPath(vName));
#endif  // _IGFD_WIN_
        if (!res) {
            std::cout << "Error creating directory " << vName << std::endl;
        }
        return res;
    }

    std::vector<IGFD::PathDisplayedName> GetDevicesList() override {
        std::vector<IGFD::PathDisplayedName> res;
#ifdef _IGFD_WIN_
        const DWORD mydevices = 2048;
        char lpBuffer[2048];
#define mini(a, b) (((a) < (b)) ? (a) : (b))
        const DWORD countChars = mini(GetLogicalDriveStringsA(mydevices, lpBuffer), 2047);