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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.
64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
// -*- C++ -*-
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/**
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* \file InsetMathFontOld.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 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_FONTOLDINSET_H
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#define MATH_FONTOLDINSET_H
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#include "InsetMathNest.h"
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namespace lyx {
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class latexkeys;
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/// Old-style font changes
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class InsetMathFontOld : public InsetMathNest {
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public:
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///
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explicit InsetMathFontOld(Buffer * buf, latexkeys const * key);
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/// we inherit the mode
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mode_type currentMode() const { return current_mode_; }
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/// we write extra braces in any case...
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bool extraBraces() const { return true; }
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///
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void metrics(MetricsInfo & mi, Dimension & dim) const;
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///
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void draw(PainterInfo & pi, int x, int y) const;
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///
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void metricsT(TextMetricsInfo const & mi, Dimension & dim) const;
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///
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void drawT(TextPainter & pi, int x, int y) const;
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///
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void write(WriteStream & os) const;
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///
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void normalize(NormalStream &) const;
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///
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void infoize(odocstream & os) const;
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///
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int kerning(BufferView const * bv) const { return cell(0).kerning(bv); }
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///
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InsetCode lyxCode() const { return MATH_FONTOLD_CODE; }
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private:
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std::string font() const;
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///
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virtual Inset * clone() const;
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/// the font to be used on screen
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latexkeys const * key_;
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/// the inherited mode
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mutable mode_type current_mode_;
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};
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} // namespace lyx
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#endif
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