src/mathed/InsetMathUnderset.cpp

   1 /**
   2  * \file InsetMathUnderset.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathUnderset.h"
  14 #include "MathData.h"
  15 #include "MathStream.h"
  16
  17 #include "Cursor.h"
  18 #include "LaTeXFeatures.h"
  19
  20 using namespace std;
  21
  22 namespace lyx {
  23
  24 Inset * InsetMathUnderset::clone() const
  25 {
  26         return new InsetMathUnderset(*this);
  27 }
  28
  29
  30 void InsetMathUnderset::metrics(MetricsInfo & mi, Dimension & dim) const
  31 {
  32         Dimension dim1;
  33         cell(1).metrics(mi, dim1);
  34         FracChanger dummy(mi.base);
  35         Dimension dim0;
  36         cell(0).metrics(mi, dim0);
  37         dim.wid = max(dim0.width(), dim1.width()) + 4;
  38         dim.asc = dim1.ascent();
  39         dim.des = dim1.descent() + dim0.height() + 4;
  40         metricsMarkers(dim);
  41 }
  42
  43
  44 void InsetMathUnderset::draw(PainterInfo & pi, int x, int y) const
  45 {
  46         Dimension const dim = dimension(*pi.base.bv);
  47         Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
  48         Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
  49         int m  = x + dim.wid / 2;
  50         int yo = y + dim1.descent() + dim0.ascent() + 1;
  51         cell(1).draw(pi, m - dim1.width() / 2, y);
  52         FracChanger dummy(pi.base);
  53         cell(0).draw(pi, m - dim0.width() / 2, yo);
  54         drawMarkers(pi, x, y);
  55 }
  56
  57
  58 bool InsetMathUnderset::idxFirst(Cursor & cur) const
  59 {
  60         cur.idx() = 1;
  61         cur.pos() = 0;
  62         return true;
  63 }
  64
  65
  66 bool InsetMathUnderset::idxLast(Cursor & cur) const
  67 {
  68         cur.idx() = 1;
  69         cur.pos() = cur.lastpos();
  70         return true;
  71 }
  72
  73
  74 bool InsetMathUnderset::idxUpDown(Cursor & cur, bool up) const
  75 {
  76         idx_type target = up; // up ? 1 : 0, since upper cell has idx 1
  77         if (cur.idx() == target)
  78                 return false;
  79         cur.idx() = target;
  80         cur.pos() = cur.cell().x2pos(&cur.bv(), cur.x_target());
  81         return true;
  82 }
  83
  84
  85 void InsetMathUnderset::write(WriteStream & os) const
  86 {
  87         MathEnsurer ensurer(os);
  88         os << "\\underset{" << cell(0) << "}{" << cell(1) << '}';
  89 }
  90
  91
  92 void InsetMathUnderset::normalize(NormalStream & os) const
  93 {
  94         os << "[underset " << cell(0) << ' ' << cell(1) << ']';
  95 }
  96
  97
  98 void InsetMathUnderset::validate(LaTeXFeatures & features) const
  99 {
 100         features.require("amsmath");
 101         InsetMathNest::validate(features);
 102 }
 103
 104
 105 } // namespace lyx