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/**
* Yudit Unicode Editor Source File
*
* GNU Copyright (C) 1997-2023 Gaspar Sinai <gaspar@yudit.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* dated June 1991. See file COPYYING for details.
*
* 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.
*/
#include "stoolkit/sencoder/SB_BiDi.h"
#include "stoolkit/SString.h"
#include "stoolkit/SStringVector.h"
#include "stoolkit/STextData.h"
#define SS_ESC 27
/**
* @author: Gaspar Sinai <gaspar@yudit.org>
* @version: 2000-05-12
*/
/**
* This is a converter to import data that is supposed to
* be parsed with a bi-di parser.
* Yudit uses a less nasty format.
* Yudit's format is more consistent and almost
* compliant with unicode standard, and I think it is less ambiguous
* than the standard. SO you dont really need this class :)
*/
/**
*-----------------------------------------------------------------------------
*-----------------------------------------------------------------------------
*
* FOR IMPLEMENTORS:
* You only need to write 2 routines. You dont need any tables!
*
* 1. Take a look at Yudit BiDi in doc/Yudit.bidi.txt
* You will
* - SB_BiDi::decode to yudit format from utf-8
* - SB_BiDi::encode from yudit format to utf-8
*
* 2. Take a look at fribidi. I have one implementation at
* stoolkit/work. You dont need those huse tables.
* you can get the category with:
* SS_UCS2 u2 = category.encode (ucs4[i]);
* if (u2 == 0x4) // Mark, Non-Spacing
* see mytool/mys/category.mys
*
* Sorry I was too busy so I did not implement this.
*
* Gaspar Sinai <gaspar@yudit.org>
* 2001-11-25.
*-----------------------------------------------------------------------------
*-----------------------------------------------------------------------------
*/
/**
* TODO: implement this.
*/
SB_BiDi::SB_BiDi() : SBEncoder ("\n,\r\n,\r"), category ("category"), interface(false)
{
ok = false;
/* FIXME: remove comment
ok = category.isOK();
*/
}
SB_BiDi::~SB_BiDi ()
{
}
/**
* return false if this generic encoder does not exist.
*/
bool
SB_BiDi::isOK() const
{
return ok;
}
/**
* This is encoding a unicode string into a bytestring
* @param input is a unicode string.
*/
const SString&
SB_BiDi::encode (const SV_UCS4& input)
{
sstring = interface.encode (input);
/* TODO: do the fuzz here. use category. LRO RLO and PDF needs to be
* taken care. By default assume LRO.
*/
return sstring;
}
/**
* Decode an input string into a unicode string.
* @param input is a string.
* he output can be null, in this case a line is not
* read fully. If input size is zero output will be flushed.
*/
const SV_UCS4&
SB_BiDi::decode (const SString& _input)
{
ucs4string = interface.decode (_input);
/* TODO: do the fuzz here. use category. */
return ucs4string;
}
/**
* These methods guess the line delimiters for the input
* The one without arguments is giving the 'first approximation'
* It returns an inclusive list of all possibilities.
*/
const SStringVector&
SB_BiDi::delimiters ()
{
return realDelimiters;
}
/**
* These methods guess the line delimiters for the input
* The one without arguments is giving the 'first approximation'
* It returns an exact list
*/
const SStringVector&
SB_BiDi::delimiters (const SString& sample)
{
return sampleDelimiters;
}
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