FormatterFwd.hpp

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// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
// under NSF AWARD 1414736 and by the respective contributors.
// All rights reserved.
//
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
// [CLI11:public_includes:set]
#include <functional>
#include <map>
#include <string>
#include <utility>
#include <vector>
// [CLI11:public_includes:end]
 
#include "StringTools.hpp"
 
namespace CLI {
// [CLI11:formatter_fwd_hpp:verbatim]
 
class Option;
class App;
 
 
enum class AppFormatMode {
    Normal,  
    All,     
    Sub,     
};
 
class FormatterBase {
  protected:
 
    std::size_t column_width_{30};
 
    std::map<std::string, std::string> labels_{};
 
 
  public:
    FormatterBase() = default;
    FormatterBase(const FormatterBase &) = default;
    FormatterBase(FormatterBase &&) = default;
 
    virtual ~FormatterBase() noexcept {}  // NOLINT(modernize-use-equals-default)
 
    virtual std::string make_help(const App *, std::string, AppFormatMode) const = 0;
 
 
    void label(std::string key, std::string val) { labels_[key] = val; }
 
    void column_width(std::size_t val) { column_width_ = val; }
 
 
    CLI11_NODISCARD std::string get_label(std::string key) const {
        if(labels_.find(key) == labels_.end())
            return key;
        return labels_.at(key);
    }
 
    CLI11_NODISCARD std::size_t get_column_width() const { return column_width_; }
 
};
 
class FormatterLambda final : public FormatterBase {
    using funct_t = std::function<std::string(const App *, std::string, AppFormatMode)>;
 
    funct_t lambda_;
 
  public:
    explicit FormatterLambda(funct_t funct) : lambda_(std::move(funct)) {}
 
    ~FormatterLambda() noexcept override {}  // NOLINT(modernize-use-equals-default)
 
    std::string make_help(const App *app, std::string name, AppFormatMode mode) const override {
        return lambda_(app, name, mode);
    }
};
 
class Formatter : public FormatterBase {
  public:
    Formatter() = default;
    Formatter(const Formatter &) = default;
    Formatter(Formatter &&) = default;
 
 
    CLI11_NODISCARD virtual std::string
    make_group(std::string group, bool is_positional, std::vector<const Option *> opts) const;
 
    virtual std::string make_positionals(const App *app) const;
 
    std::string make_groups(const App *app, AppFormatMode mode) const;
 
    virtual std::string make_subcommands(const App *app, AppFormatMode mode) const;
 
    virtual std::string make_subcommand(const App *sub) const;
 
    virtual std::string make_expanded(const App *sub) const;
 
    virtual std::string make_footer(const App *app) const;
 
    virtual std::string make_description(const App *app) const;
 
    virtual std::string make_usage(const App *app, std::string name) const;
 
    std::string make_help(const App * /*app*/, std::string, AppFormatMode) const override;
 
 
    virtual std::string make_option(const Option *opt, bool is_positional) const {
        std::stringstream out;
        detail::format_help(
            out, make_option_name(opt, is_positional) + make_option_opts(opt), make_option_desc(opt), column_width_);
        return out.str();
    }
 
    virtual std::string make_option_name(const Option *, bool) const;
 
    virtual std::string make_option_opts(const Option *) const;
 
    virtual std::string make_option_desc(const Option *) const;
 
    virtual std::string make_option_usage(const Option *opt) const;
 
};
 
// [CLI11:formatter_fwd_hpp:end]
}  // namespace CLI