libaegis/wide_output/truncate.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_WIDE_OUTPUT_TRUNCATE_H
#define LIBAEGIS_WIDE_OUTPUT_TRUNCATE_H

#include <common/wstring/accumulator.h>
#include <libaegis/wide_output.h>

class wide_output_truncate:
    public wide_output
{
public:
    virtual ~wide_output_truncate();

private:
    wide_output_truncate(const wide_output::pointer &deeper, int width);

public:
    static pointer open(const wide_output::pointer &deeper, int width);

protected:
    // See base class for documentation.
    nstring filename();

    // See base class for documentation.
    int page_width();

    // See base class for documentation.
    int page_length();

    // See base class for documentation.
    const char *type_name() const;

    // See base class for documentation.
    void write_inner(const wchar_t *data, size_t len);

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

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

private:
    wide_output::pointer deeper;

    int width;

    wstring_accumulator buf;

    int column;

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

#endif // LIBAEGIS_WIDE_OUTPUT_TRUNCATE_H