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66fa801e74
The computation of length on screen depend in particular of the computation of the size of an em. Many places of the code used to rely on the width of the M character, which is not really correct: http://en.wikipedia.org/wiki/Em_%28typography%29 In digital typography, the best value to use is the point size of the font. * Implement FontMetrics::em(), which returns the value in pixels of the EM unit. Convert code to use it. * Introduce Length::inPixel(MetricsBase const &), which takes the textwidth and em information from the MetricsBase object. Convert code to use it. * Fix several places where Length::inPixel is used without a proper em value. * add mathed_font_em() helper function. It should eventually be removed like some other functions in MathSupport. * Add dummy implementation of FontMetrics to tex2lyx for linking purposes.
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
// -*- C++ -*-
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/**
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* \file MathSupport.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 Alejandro Aguilar Sierra
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* \author André Pönitz
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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 MATH_SUPPORT_H
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#define MATH_SUPPORT_H
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#include "MathParser_flags.h"
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#include "support/strfwd.h"
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namespace lyx {
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class MetricsInfo;
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class PainterInfo;
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class FontInfo;
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class Dimension;
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class MathData;
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class MathAtom;
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class InsetMath;
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int mathed_font_em(FontInfo const &);
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int mathed_char_width(FontInfo const &, char_type c);
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int mathed_char_kerning(FontInfo const &, char_type c);
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void mathed_draw_deco(PainterInfo & pi, int x, int y, int w, int h,
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docstring const & name);
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void mathed_string_dim(FontInfo const & font,
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docstring const & s,
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Dimension & dim);
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int mathed_string_width(FontInfo const &, docstring const & s);
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void metricsStrRedBlack(MetricsInfo & mi, Dimension & dim, docstring const & s);
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void drawStrRed(PainterInfo & pi, int x, int y, docstring const & s);
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void drawStrBlack(PainterInfo & pi, int x, int y, docstring const & s);
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void math_font_max_dim(FontInfo const &, int & asc, int & desc);
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void augmentFont(FontInfo & f, docstring const & cmd);
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bool isFontName(docstring const & name);
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bool isMathFont(docstring const & name);
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bool isTextFont(docstring const & name);
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bool isAlphaSymbol(MathAtom const & at);
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// converts single cell to string
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docstring asString(MathData const & ar);
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// converts single inset to string
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docstring asString(InsetMath const &);
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docstring asString(MathAtom const &);
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// converts string to single cell
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void asArray(docstring const &, MathData &, Parse::flags f = Parse::NORMAL);
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} // namespace lyx
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#endif
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