src/mathed/math_decorationinset.C

   1 #include <config.h>
   2
   3 #ifdef __GNUG__
   4 #pragma implementation
   5 #endif
   6
   7 #include "math_decorationinset.h"
   8 #include "mathed/support.h"
   9 #include "math_parser.h"
  10 #include "support/LOstream.h"
  11 #include "support/lstrings.h"
  12
  13
  14 using std::ostream;
  15
  16
  17 MathDecorationInset::MathDecorationInset(int d)
  18         : MathInset("", LM_OT_DECO, 1), deco_(d)
  19 {
  20         upper_ = deco_ != LM_underline && deco_ != LM_underbrace;
  21 }
  22
  23
  24 MathInset * MathDecorationInset::clone() const
  25 {
  26         return new MathDecorationInset(*this);
  27 }
  28
  29
  30
  31 void MathDecorationInset::Metrics(MathStyles st)
  32 {
  33         int const h = 2 * mathed_char_height(LM_TC_VAR, size(), 'I',
  34                                              ascent_, descent_);
  35         xcell(0).Metrics(st);
  36         width_   = xcell(0).width();
  37         ascent_  = xcell(0).ascent();
  38         descent_ = xcell(0).descent();
  39
  40         int w = width() + 4;
  41
  42         dh_ = w / 5;
  43         if (dh_ > h)
  44                 dh_ = h;
  45
  46         if (upper_) {
  47                 ascent_ += dh_ + 2;
  48                 dy_ = -ascent_;
  49         } else {
  50                 dy_ = descent_ + 2;
  51                 descent_ += dh_ + 4;
  52         }
  53         width_ = w;
  54 }
  55
  56 void MathDecorationInset::draw(Painter & pain, int x, int y)
  57 {
  58         xo(x);
  59         yo(x);
  60         xcell(0).draw(pain, x, y);
  61         mathed_draw_deco(pain, x, y + dy_, width_, dh_, deco_);
  62 }
  63
  64
  65 void MathDecorationInset::Write(ostream & os, bool fragile) const
  66 {
  67         latexkeys const * l = lm_get_key_by_id(deco_, LM_TK_WIDE);
  68         if (fragile &&
  69             (compare(l->name, "overbrace") == 0 ||
  70              compare(l->name, "underbrace") == 0 ||
  71              compare(l->name, "overleftarrow") == 0 ||
  72              compare(l->name, "overrightarrow") == 0))
  73                 os << "\\protect";
  74         os << '\\' << l->name << '{';
  75         cell(0).Write(os, fragile);
  76         os << '}';
  77 }