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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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/>.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/ustr.h"
#include "common/unicode-bidi.h"
#include "common/textconsole.h"
#ifdef USE_FRIBIDI
#include <fribidi/fribidi.h>
#endif
namespace Common {
uint32 GetFriBiDiParType(BiDiParagraph dir) {
#ifdef USE_FRIBIDI
if (dir == BIDI_PAR_ON) {
return FRIBIDI_PAR_ON;
} else if (dir == BIDI_PAR_RTL) {
return FRIBIDI_PAR_RTL;
} else if (dir == BIDI_PAR_LTR) {
return FRIBIDI_PAR_LTR;
}
#endif
return 0;
}
UnicodeBiDiText::UnicodeBiDiText(const Common::U32String &str, BiDiParagraph dir) :
logical(str), _pbase_dir(GetFriBiDiParType(dir)),
_log_to_vis_index(nullptr), _vis_to_log_index(nullptr) {
initWithU32String(str);
}
UnicodeBiDiText::UnicodeBiDiText(const Common::String &str, const Common::CodePage page,
uint32 *pbase_dir) : logical(str), _log_to_vis_index(nullptr), _vis_to_log_index(nullptr) {
_pbase_dir = *pbase_dir;
initWithU32String(str.decode(page));
*pbase_dir = _pbase_dir;
}
UnicodeBiDiText::~UnicodeBiDiText() {
delete[] _log_to_vis_index;
delete[] _vis_to_log_index;
}
uint32 UnicodeBiDiText::getVisualPosition(uint32 logicalPos) const {
if (nullptr != _log_to_vis_index && logicalPos < size()) {
return _log_to_vis_index[logicalPos];
}
return logicalPos;
}
uint32 UnicodeBiDiText::getLogicalPosition(uint32 visualPos) const {
if (nullptr != _log_to_vis_index && visualPos < size()) {
return _vis_to_log_index[visualPos];
}
return visualPos;
}
void UnicodeBiDiText::initWithU32String(const U32String &input) {
#ifdef USE_FRIBIDI
uint32 input_size = input.size();
uint32 buff_length = (input_size + 2) * 2; // it's more than enough, but it's better to be on the safe side
FriBidiChar *visual_str = new FriBidiChar[buff_length * sizeof(FriBidiChar)];
_log_to_vis_index = new uint32[input_size];
_vis_to_log_index = new uint32[input_size];
FriBidiParType pbase_dir = FriBidiParType(_pbase_dir);
if (!fribidi_log2vis(
/* input */
(const FriBidiChar *)input.c_str(),
input_size,
&pbase_dir,
/* output */
visual_str,
(FriBidiStrIndex *)_log_to_vis_index, // position_L_to_V_list,
(FriBidiStrIndex *)_vis_to_log_index, // position_V_to_L_list,
nullptr // embedding_level_list
)) {
warning("initWithU32String: calling fribidi_log2vis failed");
delete[] visual_str;
delete[] _log_to_vis_index;
delete[] _vis_to_log_index;
visual = input;
_log_to_vis_index = nullptr;
_vis_to_log_index = nullptr;
} else {
visual = U32String((uint32 *)visual_str, input.size());
delete[] visual_str;
}
_pbase_dir = pbase_dir;
#else
static bool fribidiWarning = true;
if (fribidiWarning) {
warning("initWithU32String: Fribidi not available, will use input strings as fallback.");
fribidiWarning = false;
}
visual = input;
#endif
}
Common::String bidiByLineHelper(Common::String line, va_list args) {
/* Common::CodePage is int
* GCC warns that using Common::CodePage in va_arg would abort program */
Common::CodePage page = (Common::CodePage) va_arg(args, int);
uint32 *pbase_dir = va_arg(args, uint32*);
return UnicodeBiDiText(line, page, pbase_dir).visual.encode(page);
}
String convertBiDiStringByLines(const String &input, const Common::CodePage page, BiDiParagraph dir) {
uint32 pbase_dir = GetFriBiDiParType(dir);
return input.forEachLine(bidiByLineHelper, page, &pbase_dir);
}
String convertBiDiString(const String &input, const Common::Language lang, BiDiParagraph dir) {
if (lang == Common::HE_ISR) {
return Common::convertBiDiString(input, kWindows1255, dir);
} else if (lang == Common::FA_IRN) {
return Common::convertBiDiString(input, kWindows1256, dir);
} else {
return input;
}
}
String convertBiDiString(const String &input, const Common::CodePage page, BiDiParagraph dir) {
return convertBiDiU32String(input.decode(page), dir).visual.encode(page);
}
UnicodeBiDiText convertBiDiU32String(const U32String &input, BiDiParagraph dir) {
return UnicodeBiDiText(input, dir);
}
} // End of namespace Common
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