PrintFormatting.h

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#ifndef art_Framework_Art_detail_PrintFormatting_h
#define art_Framework_Art_detail_PrintFormatting_h

#include "art/Framework/Art/detail/LibraryInfoCollection.h"
#include "cetlib/container_algorithms.h"

#include <ostream>
#include <string>
#include <utility>
#include <vector>

namespace art::detail {

  //==========================================================================

  inline std::string
  indent(std::size_t const i)
  {
    return std::string(i, ' ');
  }
  inline std::string
  indent0()
  {
    return indent(3);
  }
  inline std::string
  indent_1()
  {
    return indent(4);
  }
  inline std::string
  indent__2()
  {
    return indent(8);
  }

  //==========================================================================

  template <typename T, typename Elem>
  std::size_t
  columnWidth(T const& coll,
              std::string const Elem::*cp,
              std::string const& header)
  {
    std::size_t s{header.size()};
    cet::for_all(
      coll, [&s, cp](auto const& elem) { s = std::max(s, (elem.*cp).size()); });
    return s;
  }

  inline std::size_t
  columnWidth(LibraryInfoCollection const& coll,
              std::string const& (LibraryInfo::*fp)() const,
              std::string const& header)
  {
    std::size_t s{header.size()};
    cet::for_all(
      coll, [&s, fp](auto const& li) { s = std::max(s, (li.*fp)().size()); });
    return s;
  }

  //==========================================================================
  // horizontal rules

  using Widths = std::vector<std::size_t>;

  inline std::size_t
  rule_size(Widths const& widths)
  {
    std::size_t result{indent0().size()};
    for (std::size_t const w : widths)
      result += w;
    return result +=
           (widths.size() - 1) * 4u; // Account for space between columns;
  }
} // namespace art::detail

#endif /* art_Framework_Art_detail_PrintFormatting_h */

// Local variables:
// mode: c++
// End: