2 * \file InsetMathStackrel.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
8 * Full author contact details are available in file CREDITS.
13 #include "InsetMathStackrel.h"
16 #include "LaTeXFeatures.h"
18 #include "MathStream.h"
24 InsetMathStackrel::InsetMathStackrel(Buffer * buf, bool sub)
25 : InsetMathFracBase(buf, sub ? 3 : 2)
29 Inset * InsetMathStackrel::clone() const
31 return new InsetMathStackrel(*this);
35 bool InsetMathStackrel::idxUpDown(Cursor & cur, bool up) const
41 if (cur.idx() + 1 == nargs())
44 InsetMath::idx_type target = up ? cur.idx() - 1 : cur.idx() + 1;
45 if (cur.idx() == target)
48 cur.pos() = cell(target).x2pos(&cur.bv(), cur.x_target());
53 void InsetMathStackrel::metrics(MetricsInfo & mi, Dimension & dim) const
56 cell(1).metrics(mi, dim1);
57 FracChanger dummy(mi.base);
59 cell(0).metrics(mi, dim0);
62 cell(2).metrics(mi, dim2);
63 dim.wid = max(max(dim0.width(), dim1.width()), dim2.width()) + 4;
64 dim.asc = dim1.ascent() + dim0.height() + 4;
65 dim.des = dim1.descent() + dim2.height() + dim2.descent() + 1;
67 dim.wid = max(dim0.width(), dim1.width()) + 4;
68 dim.asc = dim1.ascent() + dim0.height() + 4;
69 dim.des = dim1.descent();
75 void InsetMathStackrel::draw(PainterInfo & pi, int x, int y) const
77 Dimension const dim = dimension(*pi.base.bv);
78 Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
79 Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
80 int m = x + dim.width() / 2;
81 int yo = y - dim1.ascent() - dim0.descent() - 1;
82 cell(1).draw(pi, m - dim1.width() / 2, y);
83 FracChanger dummy(pi.base);
84 cell(0).draw(pi, m - dim0.width() / 2, yo);
86 Dimension const & dim2 = cell(2).dimension(*pi.base.bv);
87 int y2 = y + dim1.descent() + dim2.ascent() + 1;
88 cell(2).draw(pi, m - dim2.width() / 2, y2);
90 drawMarkers(pi, x, y);
94 void InsetMathStackrel::write(WriteStream & os) const
96 MathEnsurer ensurer(os);
99 os << '[' << cell(2) << ']';
100 os << '{' << cell(0) << "}{" << cell(1) << '}';
104 void InsetMathStackrel::normalize(NormalStream & os) const
106 os << "[stackrel " << cell(0) << ' ' << cell(1);
108 os << ' ' << cell(2);
113 void InsetMathStackrel::mathmlize(MathStream & ms) const
116 ms << "<munderover>" << cell(1) << cell(2) << cell(0) << "</munderover>";
118 ms << "<mover accent='false'>" << cell(1) << cell(0) << "</mover>";
122 void InsetMathStackrel::htmlize(HtmlStream & os) const
125 os << MTag("span", "class='underoverset'")
126 << MTag("span", "class='top'") << cell(0) << ETag("span")
127 << MTag("span") << cell(1) << ETag("span")
128 << MTag("span", "class='bottom'") << cell(2) << ETag("span");
130 // at the moment, this is exactly the same as overset
131 os << MTag("span", "class='overset'")
132 << MTag("span", "class='top'") << cell(0) << ETag("span")
133 << MTag("span") << cell(1) << ETag("span");
139 void InsetMathStackrel::validate(LaTeXFeatures & features) const
141 if (features.runparams().math_flavor == OutputParams::MathAsHTML) {
143 // FIXME: "vertical-align: middle" works only if the
144 // height of sub and super script is approximately equal.
145 features.addCSSSnippet(
146 "span.underoverset{display: inline-block; vertical-align: middle; text-align:center;}\n"
147 "span.underoverset span {display: block;}\n"
148 "span.bottom{font-size: 66%;}\n"
149 "span.top{font-size: 66%;}");
152 features.addCSSSnippet(
153 "span.overset{display: inline-block; vertical-align: bottom; text-align:center;}\n"
154 "span.overset span {display: block;}\n"
155 "span.top{font-size: 66%;}");
159 features.require("stackrel");
161 InsetMathNest::validate(features);