lang/include/basic_printers.hpp

#pragma once

#include "basic_nodes.hpp"
#include <iostream>

namespace printers {

class Printer {
public:
  Printer(std::ostream &output, size_t tab_width, size_t width_limit,
          bool print_words_instead_of_symbols)
      : output_(output), tab_width_(tab_width), width_limit_(width_limit),
        print_words_instead_of_symbols_(print_words_instead_of_symbols),
        current_position_(0), current_indentation_level_(0) {}

  void print_converted(const std::string &value) {
    for (auto &ch : value) {
      output_ << to_printable_symbol(ch);
      current_position_ += to_printable_symbol(ch).size();
    }
  }

  // value shouldn't contain '\n', '\t', etc.
  void print(const std::string &value) {
    output_ << value;
    current_position_ += value.size();
  }

  void column_down() {
    size_t current_position = current_position_;
    end_line();
    print_spaces(current_position);
  }

  void new_indent_line() {
    end_line();
    print_spaces(current_indentation_level_ * tab_width_);
  }

  void new_line(size_t indentation) {
    end_line();
    print_spaces(indentation);
  }

  void indent() { current_indentation_level_ += tab_width_; }

  void deindent() { current_indentation_level_ -= tab_width_; }

  void tab() { print_spaces(tab_width_); }

  void space() { print_spaces(1); }

  size_t current_position() const { return current_position_; }

  size_t width_limit() const { return width_limit_; }

  size_t width_left() const {
    return std::max(static_cast<int64_t>(width_limit_) -
                        static_cast<int64_t>(current_position_),
                    static_cast<int64_t>(0));
  }

  bool print_words_instead_of_symbols() const {
    return print_words_instead_of_symbols_;
  }

  size_t get_current_position() const { return current_position_; }

  size_t get_current_indentation_level() const {
    return current_indentation_level_;
  }

  size_t set_current_indentation_level(size_t indentation_level) {
    current_indentation_level_ = indentation_level;
  }

private:
  void end_line() {
    output_ << "\n";
    current_position_ = 0;
  }
  void print_spaces(size_t n) { print(std::string(n, ' ')); }

  static std::string to_printable_symbol(char ch) {
    switch (ch) {
    case '\a':
      return "\\a";
    case '\b':
      return "\\b";
    case '\e':
      return "\\e";
    case '\f':
      return "\\f";
    case '\n':
      return "\\n";
    case '\r':
      return "\\r";
    case '\t':
      return "\\t";
    case '\v':
      return "\\v";
    case '\'':
      return "\\\'";
    case '\"':
      return "\\\"";
    // case ' ':
    //   return "\\s";
    default:
      return std::string(1, ch);
    }
  }

private:
  std::ostream &output_;
  size_t tab_width_ = 0;
  size_t width_limit_ = 0;
  bool print_words_instead_of_symbols_ = false;

  size_t current_position_ = 0;
  size_t current_indentation_level_ = 0;
};

void print_literal(const nodes::Literal &literal, Printer &printer);

void print_identifier(const nodes::Identifier &identifier, Printer &printer);

void print_annotation(const std::string &annotation, Printer &printer);

} // namespace printers