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 "math_support.h"
   9 #include "math_parser.h"
  10 #include "math_mathmlstream.h"
  11 #include "math_streamstr.h"
  12
  13
  14 MathDecorationInset::MathDecorationInset(string const & name)
  15         : MathNestInset(1), name_(name)
  16 {}
  17
  18
  19 MathInset * MathDecorationInset::clone() const
  20 {
  21         return new MathDecorationInset(*this);
  22 }
  23
  24
  25 bool MathDecorationInset::upper() const
  26 {
  27         return name_.substr(0, 5) != "under";
  28 }
  29
  30
  31 bool MathDecorationInset::isScriptable() const
  32 {
  33         return
  34                         name_ == "overbrace" ||
  35                         name_ == "underbrace" ||
  36                         name_ == "overleftarrow" ||
  37                         name_ == "overrightarrow" ||
  38                         name_ == "underleftarrow" ||
  39                         name_ == "underrightarrow";
  40 }
  41
  42
  43 bool MathDecorationInset::protect() const
  44 {
  45         return
  46                         name_ == "overbrace" ||
  47                         name_ == "underbrace" ||
  48                         name_ == "overleftarrow" ||
  49                         name_ == "overrightarrow" ||
  50                         name_ == "underleftarrow" ||
  51                         name_ == "underrightarrow";
  52 }
  53
  54
  55 bool MathDecorationInset::wide() const
  56 {
  57         return
  58                         name_ == "overline" ||
  59                         name_ == "underline" ||
  60                         name_ == "overbrace" ||
  61                         name_ == "underbrace" ||
  62                         name_ == "overleftarrow" ||
  63                         name_ == "overrightarrow" ||
  64                         name_ == "widehat" ||
  65                         name_ == "widetilde" ||
  66                         name_ == "underleftarrow" ||
  67                         name_ == "underrightarrow";
  68 }
  69
  70
  71 void MathDecorationInset::metrics(MathMetricsInfo const & st) const
  72 {
  73         xcell(0).metrics(st);
  74         size_    = st;
  75         width_   = xcell(0).width();
  76         ascent_  = xcell(0).ascent();
  77         descent_ = xcell(0).descent();
  78
  79         dh_ = 6; //mathed_char_height(LM_TC_VAR, size(), 'I', ascent_, descent_);
  80
  81         if (upper()) {
  82                 dy_ = -ascent_ - dh_;
  83                 ascent_ += dh_ + 1;
  84         } else {
  85                 dy_ = descent_ + 1;
  86                 descent_ += dh_ + 2;
  87         }
  88 }
  89
  90
  91 void MathDecorationInset::draw(Painter & pain, int x, int y) const
  92 {
  93         xcell(0).draw(pain, x, y);
  94         if (wide())
  95                 mathed_draw_deco(pain, x, y + dy_, width_, dh_, name_);
  96         else {
  97                 int w = mathed_char_width(LM_TC_VAR, size_, 'x');
  98                 mathed_draw_deco(pain, x + (width_ - w) / 2, y + dy_, w, dh_, name_);
  99         }
 100 }
 101
 102
 103 void MathDecorationInset::write(WriteStream & os) const
 104 {
 105         if (os.fragile() && protect())
 106                 os << "\\protect";
 107         os << '\\' << name_ << '{' << cell(0) << '}';
 108 }
 109
 110
 111 void MathDecorationInset::normalize(NormalStream & os) const
 112 {
 113         os << "[deco " << name_ << ' ' <<  cell(0) << ']';
 114 }