libaegis/col/pretty.h

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//
//      aegis - project change supervisor
//      Copyright (C) 1999, 2002, 2005, 2006, 2008 Peter Miller
//
//      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 3 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, see
//      <http://www.gnu.org/licenses/>.
//

#ifndef LIBAEGIS_COL_PRETTY_H
#define LIBAEGIS_COL_PRETTY_H

#include <libaegis/col.h>
#include <libaegis/output.h>
#include <libaegis/wide_output/column.h>

class col_pretty:
    public col
{
public:
    virtual ~col_pretty();

private:
    col_pretty(const wide_output::pointer &deeper);

public:
    static pointer create(const wide_output::pointer &deeper);

protected:
    // See base class for documentation.
    output::pointer create(int, int, const char *);

    // See base class for documentation.
    void title(const char *, const char *);

    // See base class for documentation.
    void eoln();

    // See base class for documentation.
    void need(int);

    // See base class for documentation.
    void eject();

    // See base class for documentation.
    void flush();

    // See base class for documentation.
    void forget(const output::pointer &op);

private:
    wide_output::pointer deeper;
    bool need_to_emit_headers;
    size_t ncolumns;
    size_t ncolumns_max;

    struct column_ty
    {
        ~column_ty();
        column_ty();
        column_ty(const column_ty &);
        column_ty &operator=(const column_ty &);

        wide_output_column::cpointer header;
        wide_output_column::cpointer content;
        output::pointer content_filter;
        int left;
        int right;

        void clear();
    };

    column_ty *column;

    struct emit_ty
    {
        emit_ty() : left(0) { }

        wide_output_column::cpointer content;
        int left;
    };

    void emit(size_t argc, emit_ty *argv, int minlines, bool is_the_header);

    void emit_header();

    void emit_content();

    col_pretty();

    col_pretty(const col_pretty &);

    col_pretty &operator=(const col_pretty &);
};

#endif // LIBAEGIS_COL_PRETTY_H

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