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142 lines
3.3 KiB
C++
142 lines
3.3 KiB
C++
/* This file is part of the KDE project
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Copyright (C) 2003-2005 Hamish Rodda <rodda@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "smartcursor.h"
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#include "document.h"
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#include "smartrange.h"
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using namespace KTextEditor;
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SmartCursor::SmartCursor( const Cursor & position, Document * doc, InsertBehavior insertBehavior )
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: Cursor(position)
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, m_doc(doc)
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, m_moveOnInsert(insertBehavior == MoveOnInsert)
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{
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Q_ASSERT(m_doc);
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}
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SmartCursor::~ SmartCursor( )
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{
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}
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bool SmartCursor::isValid( ) const
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{
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return m_doc->cursorInText(*this);
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}
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bool SmartCursor::atEndOfDocument( ) const
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{
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return *this >= m_doc->documentEnd();
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}
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bool SmartCursor::isSmartCursor( ) const
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{
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return true;
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}
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bool SmartCursor::insertText( const QStringList & text, bool block )
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{
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return document()->insertText(*this, text, block);
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}
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QChar SmartCursor::character( ) const
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{
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return document()->character(*this);
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}
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SmartRange * SmartCursor::smartRange( ) const
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{
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return static_cast<SmartRange*>(m_range);
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}
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Document* SmartCursor::document() const
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{
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return m_doc;
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}
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bool SmartCursor::atEndOfLine( ) const
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{
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return column() == m_doc->lineLength(line());
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}
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SmartCursor::InsertBehavior SmartCursor::insertBehavior( ) const
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{
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return m_moveOnInsert ? MoveOnInsert : StayOnInsert;
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}
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void SmartCursor::setInsertBehavior( InsertBehavior insertBehavior )
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{
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m_moveOnInsert = insertBehavior == MoveOnInsert;
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}
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SmartCursor * SmartCursor::toSmartCursor( ) const
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{
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return const_cast<SmartCursor*>(this);
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}
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bool SmartCursor::advance(int distance, AdvanceMode mode)
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{
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Cursor c = *this;
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if (mode == ByCharacter) {
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while (distance) {
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int lineLength = document()->lineLength(c.line());
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if (distance > 0) {
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int advance = qMin(lineLength - c.column(), distance);
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if (distance > advance) {
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if (c.line() + 1 >= document()->lines())
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return false;
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c.setPosition(c.line() + 1, 0);
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// Account for end of line advancement
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distance -= advance + 1;
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} else {
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c.setColumn(c.column() + distance);
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distance = 0;
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}
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} else {
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int back = qMin(c.column(), -distance);
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if (-distance > back) {
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if (c.line() - 1 < 0)
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return false;
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c.setPosition(c.line() - 1, document()->lineLength(c.line() - 1));
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// Account for end of line advancement
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distance += back + 1;
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} else {
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c.setColumn(c.column() + distance);
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distance = 0;
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}
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}
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}
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} else {
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// Not supported by the interface alone
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return false;
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}
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setPosition(c);
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return true;
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}
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// kate: space-indent on; indent-width 2; replace-tabs on;
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