File indexing completed on 2024-05-19 05:28:19

 /*
     This file is part of Konsole, an X terminal.
 
     SPDX-FileCopyrightText: 2006-2008 Robert Knight <robertknight@gmail.com>
     SPDX-License-Identifier: GPL-2.0-or-later
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as published by
     the Free Software Foundation; either version 2 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 Lesser General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
     02110-1301  USA.
 */
 
 // Own
 #include "TerminalCharacterDecoder.h"
 
 // stdlib
 #include <cwctype>
 
 // Qt
 #include <QTextStream>
 
 // KDE
 // #include <kdebug.h>
 
 // Konsole
 #include "konsole_wcwidth.h"
 
 #include <cwctype>
 
 using namespace Konsole;
 PlainTextDecoder::PlainTextDecoder()
     : _output(nullptr)
     , _includeTrailingWhitespace(true)
     , _recordLinePositions(false)
 {
 }
 void PlainTextDecoder::setTrailingWhitespace(bool enable)
 {
     _includeTrailingWhitespace = enable;
 }
 bool PlainTextDecoder::trailingWhitespace() const
 {
     return _includeTrailingWhitespace;
 }
 void PlainTextDecoder::begin(QTextStream *output)
 {
     _output = output;
     if (!_linePositions.isEmpty())
         _linePositions.clear();
 }
 void PlainTextDecoder::end()
 {
     _output = nullptr;
 }
 
 void PlainTextDecoder::setRecordLinePositions(bool record)
 {
     _recordLinePositions = record;
 }
 QList<int> PlainTextDecoder::linePositions() const
 {
     return _linePositions;
 }
 
 void PlainTextDecoder::decodeLine(std::span<const Character> characters, LineProperty /*properties*/)
 {
     Q_ASSERT(_output);
     int count = characters.size();
 
     if (_recordLinePositions && _output->string()) {
         int pos = _output->string()->size();
         _linePositions << pos;
     }
 
     // check the real length
     for (int i = 0; i < count; i++) {
         if (characters.subspan(i).empty()) {
             count = i;
             break;
         }
     }
 
     // TODO should we ignore or respect the LINE_WRAPPED line property?
 
     // note:  we build up a QString and send it to the text stream rather writing into the text
     // stream a character at a time because it is more efficient.
     //(since QTextStream always deals with QStrings internally anyway)
     QString plainText;
     plainText.reserve(count);
 
     int outputCount = count;
 
     // if inclusion of trailing whitespace is disabled then find the end of the
     // line
     if (!_includeTrailingWhitespace) {
         for (int i = count - 1; i >= 0; i--) {
             if (characters[i].character != u' ')
                 break;
             else
                 outputCount--;
         }
     }
 
     for (int i = 0; i < outputCount;) {
         plainText.push_back(characters[i].character);
         i += qMax(1, konsole_wcwidth(characters[i].character));
     }
     *_output << plainText;
 }