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/* This file is part of the KDE project
Copyright (C) 2003-2005 Hamish Rodda <rodda@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 version 2 as published by the Free Software Foundation.
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 "smartcursor.h"
#include "document.h"
#include "smartrange.h"
using namespace KTextEditor;
SmartCursor::SmartCursor( const Cursor & position, Document * doc, InsertBehavior insertBehavior )
: Cursor(position)
, m_doc(doc)
, m_moveOnInsert(insertBehavior == MoveOnInsert)
{
Q_ASSERT(m_doc);
}
SmartCursor::~ SmartCursor( )
{
}
bool SmartCursor::isValid( ) const
{
return m_doc->cursorInText(*this);
}
bool SmartCursor::atEndOfDocument( ) const
{
return *this >= m_doc->documentEnd();
}
bool SmartCursor::isSmartCursor( ) const
{
return true;
}
bool SmartCursor::insertText( const QStringList & text, bool block )
{
return document()->insertText(*this, text, block);
}
QChar SmartCursor::character( ) const
{
return document()->character(*this);
}
SmartRange * SmartCursor::smartRange( ) const
{
return static_cast<SmartRange*>(m_range);
}
Document* SmartCursor::document() const
{
return m_doc;
}
bool SmartCursor::atEndOfLine( ) const
{
return column() == m_doc->lineLength(line());
}
SmartCursor::InsertBehavior SmartCursor::insertBehavior( ) const
{
return m_moveOnInsert ? MoveOnInsert : StayOnInsert;
}
void SmartCursor::setInsertBehavior( InsertBehavior insertBehavior )
{
m_moveOnInsert = insertBehavior == MoveOnInsert;
}
SmartCursor * SmartCursor::toSmartCursor( ) const
{
return const_cast<SmartCursor*>(this);
}
bool SmartCursor::advance(int distance, AdvanceMode mode)
{
Cursor c = *this;
if (mode == ByCharacter) {
while (distance) {
int lineLength = document()->lineLength(c.line());
if (distance > 0) {
int advance = qMin(lineLength - c.column(), distance);
if (distance > advance) {
if (c.line() + 1 >= document()->lines())
return false;
c.setPosition(c.line() + 1, 0);
// Account for end of line advancement
distance -= advance + 1;
} else {
c.setColumn(c.column() + distance);
distance = 0;
}
} else {
int back = qMin(c.column(), -distance);
if (-distance > back) {
if (c.line() - 1 < 0)
return false;
c.setPosition(c.line() - 1, document()->lineLength(c.line() - 1));
// Account for end of line advancement
distance += back + 1;
} else {
c.setColumn(c.column() + distance);
distance = 0;
}
}
}
} else {
// Not supported by the interface alone
return false;
}
setPosition(c);
return true;
}
// kate: space-indent on; indent-width 2; replace-tabs on;
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