lyx_mirror/src/ParagraphMetrics.h

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// -*- C++ -*-
/**
* \file ParagraphMetrics.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Asger Alstrup
* \author Lars Gullik Bj<EFBFBD>nnes
* \author John Levon
* \author Andr<EFBFBD> P<EFBFBD>nitz
* \author J<EFBFBD>rgen Vigna
* \author Abdelrazak Younes
*
* Full author contact details are available in file CREDITS.
*/
#ifndef PARAGRAPH_METRICS_H
#define PARAGRAPH_METRICS_H
#include "Paragraph.h"
namespace lyx {
class MetricsInfo;
class PainterInfo;
/// Helper class for Paragraph Metrics.
class ParagraphMetrics {
public:
/// Default constructor (only here for STL containers).
ParagraphMetrics(): par_(0) {};
/// The only useful constructor.
ParagraphMetrics(Paragraph const & par);
/// Copy operator.
/// Important note: We don't copy \c row_change_status_ and
/// \c row_signature_ because those are updated externally with
/// \c updateRowChangeStatus() in TextMetrics::redoParagraph().
ParagraphMetrics & operator=(ParagraphMetrics const &);
///
Row & getRow(pos_type pos, bool boundary);
///
Row const & getRow(pos_type pos, bool boundary) const;
///
size_t pos2row(pos_type pos) const;
/// BufferView::redoParagraph updates this
Dimension const & dim() const { return dim_; }
Dimension & dim() { return dim_; }
/// total height of paragraph
unsigned int height() const { return dim_.height(); }
/// total width of paragraph, may differ from workwidth
unsigned int width() const { return dim_.width(); }
/// ascend of paragraph above baseline
unsigned int ascent() const { return dim_.ascent(); }
/// descend of paragraph below baseline
unsigned int descent() const { return dim_.descent(); }
/// LyXText updates the rows using this access point
RowList & rows() { return rows_; }
/// The painter and others use this
RowList const & rows() const { return rows_; }
/// The painter and others use this
std::vector<bool> const & rowChangeStatus() const
{ return row_change_status_; }
///
void updateRowChangeStatus();
///
int rightMargin(Buffer const & buffer) const;
/// dump some information to lyxerr
void dump() const;
private:
///
size_type calculateRowSignature(Row const &);
///
mutable RowList rows_;
///
RowSignature row_signature_;
///
std::vector<bool> row_change_status_;
/// cached dimensions of paragraph
Dimension dim_;
///
Paragraph const * par_;
};
} // namespace lyx
#endif // PARAGRAPH_METRICS_H