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758de9577d
This is preliminary work to make roots look more like in TeX output: * correct font size for root order * set minimum size of the root from the max ascent descent of the font. This is what TeX does. * fix drawing, and in particular horizontal size. More needs to be done, in particular: * handle zooming and dpi correctly by removing hardcoded pixel values. * factor the code for the two types of roots in one.
164 lines
3.7 KiB
C++
164 lines
3.7 KiB
C++
/**
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* \file InsetMathRoot.cpp
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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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#include <config.h>
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#include "InsetMathRoot.h"
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#include "MathData.h"
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#include "MathStream.h"
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#include "MathSupport.h"
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#include "Cursor.h"
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#include "LaTeXFeatures.h"
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#include "MetricsInfo.h"
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#include "frontends/Painter.h"
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using namespace std;
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namespace lyx {
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InsetMathRoot::InsetMathRoot(Buffer * buf)
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: InsetMathNest(buf, 2)
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{}
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Inset * InsetMathRoot::clone() const
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{
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return new InsetMathRoot(*this);
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}
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void InsetMathRoot::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Changer dummy = mi.base.changeEnsureMath();
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Dimension dim0;
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{
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Changer script = mi.base.font.changeStyle(LM_ST_SCRIPTSCRIPT);
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cell(0).metrics(mi, dim0);
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// make sure that the dim is high enough for any character
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Dimension fontDim;
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math_font_max_dim(mi.base.font, fontDim.asc, fontDim.des);
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dim0 += fontDim;
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}
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Dimension dim1;
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cell(1).metrics(mi, dim1);
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// make sure that the dim is high enough for any character
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Dimension fontDim;
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math_font_max_dim(mi.base.font, fontDim.asc, fontDim.des);
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dim1 += fontDim;
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dim.asc = max(dim0.ascent() + 5, dim1.ascent()) + 1;
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dim.des = max(dim0.descent() - 5, dim1.descent());
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dim.wid = dim0.width() + dim1.width() + 4;
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}
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void InsetMathRoot::draw(PainterInfo & pi, int x, int y) const
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{
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Changer dummy = pi.base.changeEnsureMath();
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Dimension const dim = dimension(*pi.base.bv);
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int const a = dim.ascent();
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int const d = dim.descent();
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Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
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int const w = dim0.width();
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// the "exponent"
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{
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Changer script = pi.base.font.changeStyle(LM_ST_SCRIPTSCRIPT);
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cell(0).draw(pi, x, y + (d - a)/2 - dim0.descent());
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}
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// the "base"
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cell(1).draw(pi, x + w + 4, y);
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int xp[4];
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int yp[4];
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pi.pain.line(x + dim.width(), y - a + 1,
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x + w + 4, y - a + 1, pi.base.font.color());
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xp[0] = x + w + 4; yp[0] = y - a + 1;
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xp[1] = x + w; yp[1] = y + d;
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xp[2] = x + w - 2; yp[2] = y + (d - a)/2 + 2;
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xp[3] = x + w - 5; yp[3] = y + (d - a)/2 + 4;
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pi.pain.lines(xp, yp, 4, pi.base.font.color());
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}
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void InsetMathRoot::write(WriteStream & os) const
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{
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MathEnsurer ensurer(os);
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os << "\\sqrt[" << cell(0) << "]{" << cell(1) << '}';
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}
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void InsetMathRoot::normalize(NormalStream & os) const
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{
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os << "[root " << cell(0) << ' ' << cell(1) << ']';
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}
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bool InsetMathRoot::idxUpDown(Cursor & cur, bool up) const
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{
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Cursor::idx_type const target = up ? 0 : 1;
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if (cur.idx() == target)
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return false;
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cur.idx() = target;
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cur.pos() = up ? cur.lastpos() : 0;
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return true;
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}
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void InsetMathRoot::maple(MapleStream & os) const
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{
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os << '(' << cell(1) << ")^(1/(" << cell(0) <<"))";
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}
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void InsetMathRoot::mathematica(MathematicaStream & os) const
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{
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os << '(' << cell(1) << ")^(1/(" << cell(0) <<"))";
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}
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void InsetMathRoot::octave(OctaveStream & os) const
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{
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os << '(' << cell(1) << ")^(1/(" << cell(0) <<"))";
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}
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void InsetMathRoot::mathmlize(MathStream & os) const
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{
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os << MTag("mroot") << cell(1) << cell(0) << ETag("mroot");
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}
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void InsetMathRoot::htmlize(HtmlStream & os) const
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{
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os << MTag("span", "class='root'")
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<< MTag("sup") << cell(0) << ETag("sup")
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<< from_ascii("√")
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<< MTag("span", "class='rootof'") << cell(1) << ETag("span")
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<< ETag("span");
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}
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void InsetMathRoot::validate(LaTeXFeatures & features) const
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{
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if (features.runparams().math_flavor == OutputParams::MathAsHTML)
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features.addCSSSnippet(
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"span.rootof{border-top: thin solid black;}\n"
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"span.root sup{font-size: 75%;}");
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InsetMathNest::validate(features);
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}
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} // namespace lyx
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