formatter.h

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// Copyright (C) 2004 Xavier Décoret <Xavier.Decoret@imag.fr>

// This program is free software; you can redistribute it and/or 
// modify it under the terms of the GNU General Public License 
// as published by the Free Software Foundation; either 
// version 2 of the License, or (at your option) any later 
// version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#ifndef XDKBIB_FORMATTER_H
#define XDKBIB_FORMATTER_H

#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <xdkbibtex/value.h>
#include <xdkbibtex/entry.h>
#include <iostream>

namespace xdkbib
{
  class Entry;
  class File;
  class Author;
  class AuthorList;
  class Text;
  //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  // Interface of Formatter
  //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  class Formatter
  {
  public:
    virtual ~Formatter();
    virtual std::ostream& operator()(std::ostream& s,const Entry* e) const = 0;
    virtual std::ostream& operator()(std::ostream& s,const File* e) const = 0;
    virtual std::ostream& operator()(std::ostream& s,
                                     const Author* a) const = 0;
    virtual std::ostream& operator()(std::ostream& s,
                                     const AuthorList* a) const = 0;
    virtual std::ostream& operator()(std::ostream& s, const Text* t) const = 0;
  };
  //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  // Interface of BibTeX
  //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  class BibTeX : public Formatter
  {
  public:
    BibTeX();
    virtual std::ostream& operator()(std::ostream& s,const Entry* e) const;
    virtual std::ostream& operator()(std::ostream& s,const File* e) const;
    virtual std::ostream& operator()(std::ostream& s,const Author* a) const;
    virtual std::ostream& operator()(std::ostream& s,
                                     const AuthorList* a) const;
    virtual std::ostream& operator()(std::ostream& s, const Text* t) const;
    template <class O>
    std::ostream& operator()(std::ostream& s,O first,O last) const;
  private:
    void movePos(std::ostream&,unsigned int) const;
    mutable int indent_;
    mutable int pos_;
    mutable bool isFirstWord_;
  };

  template <class F>
  std::pair<const Entry*,F> format(const Entry& e)
  {
    return std::make_pair(&e,F());
  }
  template <class F>
  std::pair<const File*,F> format(const File& f)
  {
    return std::make_pair(&f,F());
  }
  template <class F>
  std::pair<const Author*,F> format(const Author& a)
  {
    return std::make_pair(&a,F());
  }
  template <class F>
  std::pair<const AuthorList*,F> format(const AuthorList& l)
  {
    return std::make_pair(&l,F());
  }
  template <class F>
  std::pair<const Text*,F> format(const Text& t)
  {
    return std::make_pair(&t,F());
  }
  template <class F>
  std::ostream& operator<<(std::ostream& s,
                           const std::pair<const Entry*,F>& p)
  {
    return p.second(s,p.first);
  }
  template <class F>
  std::ostream& operator<<(std::ostream& s,
                           const std::pair<const File*,F>& p)
  {
    return p.second(s,p.first);
  }
  template <class F>
  std::ostream& operator<<(std::ostream& s,
                           const std::pair<const Author*,F>& p)
  {
    return p.second(s,p.first);
  }
  template <class F>
  std::ostream& operator<<(std::ostream& s,
                           const std::pair<const AuthorList*,F>& p)
  {
    return p.second(s,p.first);
  }
  template <class F>
  std::ostream& operator<<(std::ostream& s,
                           const std::pair<const Text*,F>& p)
  {
    return p.second(s,p.first);
  }
  //************************************************************
  // Implementation of BibTeX
  //************************************************************
  template <class O>
  std::ostream&
  BibTeX::operator()(std::ostream& s,O first,O last) const
  {
    for (O jter = first;jter != last;++jter)
    {
      if (jter != first)
      {
        s<<" # ";
        movePos(s,3);
      }
      std::string prefix="";
      std::string suffix="";
      switch (jter->type())
      {
      case Braced: prefix="{";suffix="}";break;
      case Quoted: prefix=suffix="\"";break;
      case Number:
      case String:
        break;
      }
      Text text;
      text.readFrom(jter->content());
      s<<prefix;
      indent_ += prefix.size();
      operator()(s,&text);
      indent_ -= prefix.size();
      s<<suffix;
    }
    return s;
  }
}

#endif // XDKBIB_FORMATTER_H

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