Method ReplaceExtentionWithCurrentFilterIfNeeded

ImGuiFileDialog.cpp:1658–1709

}

std::string IGFD::FilterManager::ReplaceExtentionWithCurrentFilterIfNeeded(const std::string& vFileName, IGFD_ResultMode vFlag) const {
    auto result = vFileName;
    if (!result.empty()) {
        const auto& current_filter = m_SelectedFilter.getFirstFilter();
        if (!current_filter.empty()) {
            Utils::ReplaceString(result, "..", ".");

            // is a regex => no change
            if (current_filter.find("((") != std::string::npos) {
                return result;
            }

            // contain .* => no change
            if (current_filter.find(".*") != std::string::npos) {
                return result;
            }

            switch (vFlag) {
                case IGFD_ResultMode_KeepInputFile: {
                    return vFileName;
                }
                case IGFD_ResultMode_OverwriteFileExt: {
                    const auto& count_dots = Utils::GetCharCountInString(vFileName, '.');
                    const auto& min_dots   = ImMin<size_t>(count_dots, m_SelectedFilter.count_dots);
                    const auto& lp         = Utils::GetLastCharPosWithMinCharCount(vFileName, '.', min_dots);
                    if (lp != std::string::npos) {  // there is a user extention
                        const auto& file_name_without_user_ext = vFileName.substr(0, lp);
                        result                                 = file_name_without_user_ext + current_filter;
                    } else {  // add extention
                        result = vFileName + current_filter;
                    }
                    break;
                }
                case IGFD_ResultMode_AddIfNoFileExt: {
                    const auto& count_dots = Utils::GetCharCountInString(vFileName, '.');
                    const auto& min_dots   = ImMin<size_t>(count_dots, m_SelectedFilter.count_dots);
                    const auto& lp         = Utils::GetLastCharPosWithMinCharCount(vFileName, '.', min_dots);
                    if (lp == std::string::npos ||        // there is no user extention
                        lp == (vFileName.size() - 1U)) {  // or this pos is also the last char => considered like no user extention
                        const auto& file_name_without_user_ext = vFileName.substr(0, lp);
                        result                                 = file_name_without_user_ext + current_filter;
                    }
                    break;
                }
                default: break;
            }

            Utils::ReplaceString(result, "..", ".");
        }
    }
    return result;
}

void IGFD::FilterManager::SetDefaultFilterIfNotDefined() {
    if (m_SelectedFilter.empty() &&                   // no filter selected