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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 "TextChange.h"
TextChange::TextChange()
: m_formerPosition(0)
, m_position(0)
, m_previous(0)
, m_next(0)
{
}
int TextChange::length() const
{
return m_after.length() - m_before.length();
}
int TextChange::formerPosition() const
{
return m_formerPosition;
}
int TextChange::position() const
{
return m_position;
}
int TextChange::formerLength() const
{
// TODO
return -1;
}
void TextChange::setPosition(int pos)
{
m_position = pos;
m_formerPosition = pos;
}
void TextChange::setOldText(const QString &old)
{
m_before = old;
}
void TextChange::setNewText(const QString ¤t)
{
m_after = current;
}
void TextChange::setPrevious(TextChange *item)
{
m_previous = item;
}
void TextChange::setNext(TextChange *item)
{
m_next = item;
}
void TextChange::move(int length)
{
m_position += length;
if (m_next) {
m_next->move(length);
}
}
void TextChange::insertBefore(TextChange *node)
{
move(node->length());
node->setPrevious(previous());
node->setNext(this);
setPrevious(node);
if (node->previous()) {
node->previous()->setNext(node);
}
}
void TextChange::insertAfter(TextChange *node)
{
node->setPrevious(this);
node->setNext(next());
setNext(node);
if (node->next()) {
node->next()->setPrevious(node);
}
}
void TextChange::merge(TextChange *other)
{
// make sure the start of 'other' is within this change instance
Q_ASSERT(other->position() >= position() && other->position() <= position() + length());
/// this only does very simple merging for now.
m_after.insert(other->position() - m_position, other->after());
}
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