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https://github.com/libretro/scummvm.git
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107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "common/ustr.h"
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#include "common/unicode-bidi.h"
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#include "common/textconsole.h"
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#ifdef USE_FRIBIDI
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#include <fribidi/fribidi.h>
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#endif
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namespace Common {
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UnicodeBiDiText::UnicodeBiDiText(const Common::U32String &str) : logical(str), _log_to_vis_index(NULL), _vis_to_log_index(NULL) {
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initWithU32String(str);
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}
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UnicodeBiDiText::UnicodeBiDiText(const Common::String &str, const Common::CodePage page) : logical(str), _log_to_vis_index(NULL), _vis_to_log_index(NULL) {
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initWithU32String(str.decode(page));
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}
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UnicodeBiDiText::~UnicodeBiDiText() {
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delete[] _log_to_vis_index;
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delete[] _vis_to_log_index;
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}
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uint32 UnicodeBiDiText::getVisualPosition(uint32 logicalPos) const {
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if (NULL != _log_to_vis_index && logicalPos < size()) {
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return _log_to_vis_index[logicalPos];
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}
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return logicalPos;
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}
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uint32 UnicodeBiDiText::getLogicalPosition(uint32 visualPos) const {
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if (NULL != _log_to_vis_index && visualPos < size()) {
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return _vis_to_log_index[visualPos];
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}
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return visualPos;
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}
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void UnicodeBiDiText::initWithU32String(const U32String &input) {
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#ifdef USE_FRIBIDI
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uint32 input_size = input.size();
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uint32 buff_length = (input_size + 2) * 2; // it's more than enough, but it's better to be on the safe side
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FriBidiChar *visual_str = new FriBidiChar[buff_length * sizeof(FriBidiChar)];
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_log_to_vis_index = new uint32[input_size];
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_vis_to_log_index = new uint32[input_size];
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FriBidiCharType pbase_dir = FRIBIDI_TYPE_ON;
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if (!fribidi_log2vis(
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/* input */
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(const FriBidiChar *)input.c_str(),
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input_size,
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&pbase_dir,
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/* output */
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visual_str,
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(FriBidiStrIndex *)_log_to_vis_index, // position_L_to_V_list,
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(FriBidiStrIndex *)_vis_to_log_index, // position_V_to_L_list,
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NULL // embedding_level_list
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)) {
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warning("initWithU32String: calling fribidi_log2vis failed");
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delete[] visual_str;
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delete[] _log_to_vis_index;
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delete[] _vis_to_log_index;
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visual = input;
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_log_to_vis_index = NULL;
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_vis_to_log_index = NULL;
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} else {
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visual = U32String(visual_str, input.size());
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delete[] visual_str;
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}
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#else
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warning("initWithU32String: Fribidi not available, using input string as fallback");
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visual = input;
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#endif
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}
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String convertBiDiString(const String &input, const Common::CodePage page) {
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return convertBiDiU32String(input.decode(page)).visual.encode(page);
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}
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UnicodeBiDiText convertBiDiU32String(const U32String &input) {
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return UnicodeBiDiText(input);
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}
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} // End of namespace Common
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