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102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
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// -*- C++ -*-
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/**
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* \file TextMetrics.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 Lars Gullik Bj<EFBFBD>nnes
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* \author John Levon
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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 TEXT_METRICS_H
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#define TEXT_METRICS_H
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#include "ParagraphMetrics.h"
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#include "support/types.h"
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#include <map>
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namespace lyx {
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class BufferView;
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class LyXText;
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class MetricsInfo;
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/// A map from a LyXText to the map of paragraphs metrics
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class TextMetrics
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{
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public:
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/// Default constructor (only here for STL containers).
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TextMetrics(): text_(0) {}
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/// The only useful constructor.
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TextMetrics(BufferView *, LyXText *);
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///
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ParagraphMetrics const & parMetrics(pit_type) const;
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///
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Dimension const & dimension() const;
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Dimension const & dimension();
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/// compute text metrics.
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bool metrics(MetricsInfo & mi, Dimension & dim);
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/// Rebreaks the given paragraph.
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/// \retval true if a full screen redraw is needed.
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/// \retval false if a single paragraph redraw is enough.
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bool redoParagraph(pit_type const pit);
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///
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int ascent() const { return dim_.asc; }
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///
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int descent() const { return dim_.des; }
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/// current text width.
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int width() const { return dim_.wid; }
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/// current text heigth.
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int height() const { return dim_.height(); }
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///
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int maxWidth() const { return max_width_; }
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///
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int rightMargin(ParagraphMetrics const & pm) const;
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int rightMargin(pit_type const pit) const;
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/** this calculates the specified parameters. needed when setting
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* the cursor and when creating a visible row */
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RowMetrics computeRowMetrics(pit_type pit, Row const & row) const;
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private:
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///
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ParagraphMetrics & parMetrics(pit_type, bool redo_paragraph);
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/// the minimum space a manual label needs on the screen in pixels
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int labelFill(Paragraph const & par, Row const & row) const;
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/// The BufferView owner.
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BufferView * bv_;
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/// The text contents (the model).
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/// \todo FIXME: this should be const.
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LyXText * text_;
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bool main_text_;
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/// A map from paragraph index number to paragraph metrics
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typedef std::map<pit_type, ParagraphMetrics> ParMetricsCache;
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///
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mutable ParMetricsCache par_metrics_;
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Dimension dim_;
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int max_width_;
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};
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/// return the default height of a row in pixels, considering font zoom
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int defaultRowHeight();
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} // namespace lyx
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#endif // TEXT_METRICS_H
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