libs/textlayout/RunAroundHelper.h

0001 /* This file is part of the KDE project
0002  * Copyright (C) 2006-2007, 2010 Thomas Zander <zander@kde.org>
0003  * Copyright (C) 2010 Ko Gmbh <cbo@kogmbh.com>
0004  *
0005  * This library is free software; you can redistribute it and/or
0006  * modify it under the terms of the GNU Library General Public
0007  * License as published by the Free Software Foundation; either
0008  * version 2 of the License, or (at your option) any later version.
0009  *
0010  * This library is distributed in the hope that it will be useful,
0011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
0012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0013  * Library General Public License for more details.
0014  *
0015  * You should have received a copy of the GNU Library General Public License
0016  * along with this library; see the file COPYING.LIB.  If not, write to
0017  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0018  * Boston, MA 02110-1301, USA.
0019  */
0020 #ifndef RUNAROUNDHELPER_H
0021 #define RUNAROUNDHELPER_H
0022
0023 #include <QList>
0024 #include <QTextLine>
0025 #include <QRectF>
0026
0027 class KoTextLayoutArea;
0028 class KoTextLayoutObstruction;
0029
0030 class RunAroundHelper
0031 {
0032 public:
0033     RunAroundHelper();
0034     void setLine(KoTextLayoutArea *area, const QTextLine &l);
0035     void setObstructions(const QList<KoTextLayoutObstruction *> &obstructions);
0036     bool stayOnBaseline() const;
0037     void updateObstruction(KoTextLayoutObstruction *obstruction);
0038     bool fit(bool resetHorizontalPosition, bool isRightToLeft, const QPointF &position);
0039     QTextLine line;
0040 private:
0041     KoTextLayoutArea *m_area;
0042     QList<KoTextLayoutObstruction*> m_obstructions;
0043     QList<KoTextLayoutObstruction*> m_validObstructions;
0044     QVector<QRectF> m_lineParts;
0045     QRectF m_lineRect;
0046     qreal m_horizontalPosition;
0047     bool m_updateValidObstructions;
0048     bool m_stayOnBaseline;
0049     qreal m_textWidth;
0050     void validateObstructions();
0051     void validateObstruction(KoTextLayoutObstruction *obstruction);
0052     void createLineParts();
0053     QRectF minimizeHeightToLeastNeeded(const QRectF &lineRect);
0054     void updateLineParts(const QRectF &lineRect);
0055     QRectF getLineRectPart();
0056     void setMaxTextWidth(const QRectF &minLineRectPart, const qreal leftIndent, const qreal maxNaturalTextWidth);
0057     QRectF getLineRect(const QRectF &lineRect, const qreal maxNaturalTextWidth);
0058     void checkEndOfLine(const QRectF &lineRectPart, const qreal maxNaturalTextWidth);
0059 };
0060
0061 #endif