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 {
  namespace 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;
    }
  }
}

#endif /* art_Framework_Art_detail_PrintFormatting_h */

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// mode: c++
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