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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@19833 a592a061-630c-0410-9148-cb99ea01b6c8
105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
// -*- C++ -*-
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/**
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* \file ParagraphMetrics.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Asger Alstrup
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* \author Lars Gullik Bjønnes
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* \author John Levon
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* \author André Pönitz
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* \author Jürgen Vigna
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* \author Abdelrazak Younes
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef PARAGRAPH_METRICS_H
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#define PARAGRAPH_METRICS_H
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#include "Paragraph.h"
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namespace lyx {
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/**
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* Each paragraph is broken up into a number of rows on the screen.
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* This is a list of such on-screen rows, ordered from the top row
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* downwards.
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*/
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typedef std::vector<Row> RowList;
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class MetricsInfo;
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class PainterInfo;
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/// Helper class for Paragraph Metrics.
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class ParagraphMetrics {
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public:
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/// Default constructor (only here for STL containers).
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ParagraphMetrics(): par_(0) {};
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/// The only useful constructor.
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ParagraphMetrics(Paragraph const & par);
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/// Copy operator.
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/// Important note: We don't copy \c row_change_status_ and
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/// \c row_signature_ because those are updated externally with
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/// \c updateRowChangeStatus() in TextMetrics::redoParagraph().
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ParagraphMetrics & operator=(ParagraphMetrics const &);
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void reset(Paragraph const & par);
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///
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Row & getRow(pos_type pos, bool boundary);
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///
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Row const & getRow(pos_type pos, bool boundary) const;
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///
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size_t pos2row(pos_type pos) const;
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/// BufferView::redoParagraph updates this
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Dimension const & dim() const { return dim_; }
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Dimension & dim() { return dim_; }
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/// total height of paragraph
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unsigned int height() const { return dim_.height(); }
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/// total width of paragraph, may differ from workwidth
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unsigned int width() const { return dim_.width(); }
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/// ascend of paragraph above baseline
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unsigned int ascent() const { return dim_.ascent(); }
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/// descend of paragraph below baseline
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unsigned int descent() const { return dim_.descent(); }
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/// Text updates the rows using this access point
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RowList & rows() { return rows_; }
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/// The painter and others use this
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RowList const & rows() const { return rows_; }
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/// The painter and others use this
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std::vector<bool> const & rowChangeStatus() const
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{ return row_change_status_; }
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///
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void updateRowChangeStatus();
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///
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int rightMargin(Buffer const & buffer) const;
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///
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int singleWidth(pos_type pos, Font const & Font) const;
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/// dump some information to lyxerr
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void dump() const;
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private:
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///
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typedef std::vector<size_type> RowSignature;
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///
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size_type calculateRowSignature(Row const &);
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///
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mutable RowList rows_;
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///
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RowSignature row_signature_;
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///
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std::vector<bool> row_change_status_;
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/// cached dimensions of paragraph
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Dimension dim_;
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///
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Paragraph const * par_;
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};
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} // namespace lyx
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#endif // PARAGRAPH_METRICS_H
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