File indexing completed on 2024-05-12 16:34:58

 /* This file is part of the KDE project
  * Copyright (C) 2007 Thomas Zander <zander@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library 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
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "TextChanges.h"
 #include "TextChange.h"
 
 
 TextChanges::TextChanges()
         : m_root(0)
 {
 }
 
 TextChanges::~TextChanges()
 {
     TextChange *change = m_root;
     while (change) {
         TextChange *prev = change;
         change = change->next();
         delete prev;
     }
     m_root = 0;
 }
 
 void TextChanges::inserted(int position, const QString &text)
 {
     changed(position, QString(), text);
 }
 
 void TextChanges::changed(int position, const QString &former, const QString &latter)
 {
     TextChange *change = new TextChange();
     change->setPosition(position);
     change->setNewText(latter);
     change->setOldText(former);
     if (m_root == 0) {
         m_root = change;
         return;
     }
 
     TextChange *cursor = m_root;
     while (cursor->next()) {
         if (cursor->position() + cursor->length() >= position) break;
         cursor = cursor->next();
     }
     Q_ASSERT(cursor);
     if (cursor->position() > position) { // insert new one before.
         cursor->insertBefore(change);
         if (cursor == m_root)
             m_root = change;
     } else if (position >= cursor->position() && position <= cursor->position() + cursor->length()) {//merge
         cursor->merge(change);
         delete change;
     } else { // insert new one after.
         cursor->insertAfter(change);
         if (change->next())
             change->next()->move(change->length());
     }
 }
 
 bool TextChanges::hasText(int position, int length) const
 {
     Q_UNUSED(position);
     Q_UNUSED(length);
     return false;
 }
 
 QMap<int, const TextChange*> TextChanges::changes() const
 {
     QMap<int, const TextChange*> result;
     return result;
 }