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b2b8733096
This requires to change many docstrings into std::strings. The logic behind that
is that they represent a fixed set of math fonts, and therefore “string” means
here “poor man's enum” rather than text (this is consistent with MetricsBase).
Profiling of scrolling inside a document over macro-instensive areas:
Before the patch:
44,1% BufferView::updateMetrics()
-> 34,8% InsetMathHull::metrics()
-> 9,8% FontSetChanger::FontSetChanger()
28,4% BufferView::draw()
After the patch:
35,3% BufferView::updateMetrics()
-> 27,2% InsetMathHull::metrics
-> 0,4% FontSetChanger::FontSetChanger()
47,5% BufferView::draw()
FontSetChanger::FontSetChanger() is made 41x less expensive (with reference
BV::draw()) just by removing this conversion. The remaining 0,4% could be
squished by replacing the strings with a proper enum, but this is premature. Of
course, this only treats the symptoms: there is no good reason that this
function is called 45500 times over the time of 40 repaints.
79 lines
1.9 KiB
C++
79 lines
1.9 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_thinmuskip(FontInfo font);
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int mathed_medmuskip(FontInfo font);
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int mathed_thickmuskip(FontInfo font);
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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, std::string const & cmd);
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bool isFontName(std::string const & name);
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bool isMathFont(std::string const & name);
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bool isTextFont(std::string 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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