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/* 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;
}
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