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Fix vertical alignment of fractions
Fractions and binoms are vartically aligned with - Nicefracs are ascent-aligned with the surrounding text
This commit is contained in:
Guillaume Munch
parent
e449e70e38
commit
ad0a0e3b3c
@ -22,6 +22,7 @@
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#include "MetricsInfo.h"
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#include "TextPainter.h"
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#include "frontends/FontMetrics.h"
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#include "frontends/Painter.h"
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#include "support/lassert.h"
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@ -148,6 +149,31 @@ MathClass InsetMathFrac::mathClass() const
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}
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namespace {
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// align frac to minus character
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int dy_for_frac(MetricsBase & mb)
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{
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Changer dummy = mb.changeFontSet("mathnormal");
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return theFontMetrics(mb.font).ascent('-') - 1;
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}
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// align the top of M in the cell with the top of M in the surrounding font
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int dy_for_nicefrac(MetricsBase & mb)
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{
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// this is according to nicefrac.sty
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int big_m = theFontMetrics(mb.font).ascent('M');
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Changer dummy = mb.changeScript();
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int small_m = theFontMetrics(mb.font).ascent('M');
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return big_m - small_m;
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}
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} // anon namespace
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void InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Dimension dim0, dim1, dim2;
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@ -176,6 +202,7 @@ void InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
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case NICEFRAC: {
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// \unitfrac, \unitfracthree, \nicefrac
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dim.wid = 0;
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int const dy = dy_for_nicefrac(mi.base);
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// is there an extra cell holding the value being given a dimension?
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// (this is \unitfracthree)
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if (kind_ == UNITFRAC && nargs() == 3) {
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@ -188,8 +215,8 @@ void InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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dim.wid += dim0.wid + dim1.wid + 5;
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dim.asc = max(dim2.asc, dim0.height() + 5);
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dim.des = max(dim2.des, dim1.height() - 5);
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dim.asc = max(max(dim2.asc, dim0.asc + dy), dim1.asc);
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dim.des = max(max(dim2.des, dim0.des - dy), dim1.des);
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}
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break;
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@ -201,6 +228,7 @@ void InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
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case TFRAC:
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case OVER:
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case ATOP: {
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int const dy = dy_for_frac(mi.base);
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Changer dummy =
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// \tfrac is always in text size
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(kind_ == TFRAC) ? mi.base.font.changeStyle(LM_ST_SCRIPT) :
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@ -214,8 +242,8 @@ void InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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dim.wid = max(dim0.wid, dim1.wid) + 2;
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dim.asc = dim0.height() + 2 + 5;
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dim.des = dim1.height() + 2 - 5;
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dim.asc = dim0.height() + 2 + dy;
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dim.des = max(0, dim1.height() + 2 - dy);
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}
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} //switch (kind_)
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metricsMarkers(mi, dim);
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@ -248,6 +276,7 @@ void InsetMathFrac::draw(PainterInfo & pi, int x, int y) const
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case NICEFRAC: {
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// \unitfrac, \unitfracthree, \nicefrac
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int xx = x;
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int const dy = dy_for_nicefrac(pi.base);
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// is there an extra cell holding the value being given a dimension?
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// (this is \unitfracthree)
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if (kind_ == UNITFRAC && nargs() == 3) {
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@ -259,13 +288,9 @@ void InsetMathFrac::draw(PainterInfo & pi, int x, int y) const
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// nice fraction
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// FIXME:
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// * the solidus should be \kern-2mu/\kern-1mu.
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// * the vertical offset of the first cell should be such that the
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// top of M in the first cell matches the one of the
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// surrounding text.
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Changer dummy2 = pi.base.changeScript();
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cell(0).draw(pi, xx + 2, y - dim0.des - 5);
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Dimension const dim1 = cell(1).dimension(*pi.base.bv);
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cell(1).draw(pi, xx + dim0.wid + 5, y + dim1.asc / 2);
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cell(0).draw(pi, xx + 2, y - dy);
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cell(1).draw(pi, xx + dim0.wid + 5, y);
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// Diag line:
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pi.pain.line(xx + dim0.wid + 1, y + dim.des - 2,
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xx + dim0.wid + 6, y - dim.asc + 2,
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@ -281,6 +306,7 @@ void InsetMathFrac::draw(PainterInfo & pi, int x, int y) const
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case TFRAC:
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case OVER:
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case ATOP: {
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int const dy = dy_for_frac(pi.base);
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Changer dummy =
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// \tfrac is always in text size
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(kind_ == TFRAC) ? pi.base.font.changeStyle(LM_ST_SCRIPT) :
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@ -300,15 +326,13 @@ void InsetMathFrac::draw(PainterInfo & pi, int x, int y) const
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(kind_ == CFRACRIGHT) ? x + dim.wid - dim0.wid - 2 :
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// center
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m - dim0.wid / 2;
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// FIXME: vertical offset should be based on ex
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//int dy = theFontMetrics(pi.base.font).ex() / 2;
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cell(0).draw(pi, xx, y - dim0.des - 2 - 5);
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cell(0).draw(pi, xx, y - dim0.des - 2 - dy);
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// center
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 2 - 5);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 2 - dy);
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// horizontal line
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if (kind_ != ATOP)
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pi.pain.line(x + 1, y - 5,
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x + dim.wid - 2, y - 5, pi.base.font.color());
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pi.pain.line(x + 1, y - dy,
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x + dim.wid - 2, y - dy, pi.base.font.color());
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}
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} //switch (kind_)
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drawMarkers(pi, x, y);
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@ -601,14 +625,15 @@ int InsetMathBinom::dw(int height) const
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void InsetMathBinom::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Dimension dim0, dim1;
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int const dy = dy_for_frac(mi.base);
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Changer dummy =
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(kind_ == DBINOM) ? mi.base.font.changeStyle(LM_ST_DISPLAY) :
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(kind_ == TBINOM) ? mi.base.font.changeStyle(LM_ST_SCRIPT) :
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mi.base.changeFrac();
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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dim.asc = dim0.height() + 4 + 5;
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dim.des = dim1.height() + 4 - 5;
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dim.asc = dim0.height() + 4 + dy;
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dim.des = max(0, dim1.height() + 4 - dy);
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dim.wid = max(dim0.wid, dim1.wid) + 2 * dw(dim.height()) + 4;
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metricsMarkers2(mi, dim);
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}
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@ -619,6 +644,7 @@ void InsetMathBinom::draw(PainterInfo & pi, int x, int y) const
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Dimension const dim = dimension(*pi.base.bv);
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Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
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Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
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int const dy = dy_for_frac(pi.base);
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// define the binom brackets
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docstring const bra = kind_ == BRACE ? from_ascii("{") :
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kind_ == BRACK ? from_ascii("[") : from_ascii("(");
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@ -631,8 +657,8 @@ void InsetMathBinom::draw(PainterInfo & pi, int x, int y) const
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(kind_ == DBINOM) ? pi.base.font.changeStyle(LM_ST_DISPLAY) :
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(kind_ == TBINOM) ? pi.base.font.changeStyle(LM_ST_SCRIPT) :
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pi.base.changeFrac();
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cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - 5);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - 5);
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cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - dy);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - dy);
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}
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// draw the brackets and the marker
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mathed_draw_deco(pi, x, y - dim.ascent(), dw(dim.height()),
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@ -93,7 +93,10 @@ public:
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void htmlize(HtmlStream &) const;
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///
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void validate(LaTeXFeatures & features) const;
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public:
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private:
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/// vertical displacement
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int dy(FontInfo & fi) const;
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///
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Inset * clone() const;
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///
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Kind kind_;
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