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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Gilles Roux
* 2003 Garrett Derner
* 2010 Yoshihisa Uchida
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef PLUGIN_TEXT_VIEWER_PAGER_H
#define PLUGIN_TEXT_VIEWER_PAGER_H
#include "tv_screen_pos.h"
/* stuff for the paging */
/*
* initialize the pager module
*
* [In/Out] buf
* the start pointer of the buffer
*
* [In/Out] size
* buffer size
*
* return
* true initialize success
* false initialize failure
*/
bool tv_init_pager(unsigned char **buf, size_t *bufsize);
/* finalize the pager module */
void tv_finalize_pager(void);
/* reset the stored line positions */
void tv_reset_line_positions(void);
/*
* move to the next line
*
* [In] size
* the current line size
*/
void tv_move_next_line(int size);
/*
* return the distance from the top of the current page
*
* [In] offset
* the difference between the current line
*
* return
* difference between the current line + offset from the top of the current page
*/
int tv_get_line_positions(int offset);
/* change the new page */
void tv_new_page(void);
/*
* convert the given file position to the nearest the position (page, line)
*
* [In] fpos
* the file position which want to convert
*
* [Out] pos
* result
*/
void tv_convert_fpos(off_t fpos, struct tv_screen_pos *pos);
/*
* move to the given page and line
*
* [In] page_offset
* page offset
*
* [In] line_offset
* line offset
*
* [In] whence
* SEEK_CUR seek to the current page + offset page, the current line + offset line.
* SEEK_SET seek to the offset page, offset line.
* SEEK_END seek to the reading last page + offset page,
* the last line of the reading last page + offset line.
*/
void tv_move_screen(int page_offset, int line_offset, int whence);
#endif
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