src/mathed/math_decorationinset.C

   1 #ifdef __GNUG__
   2 #pragma implementation
   3 #endif
   4
   5 #include "math_decorationinset.h"
   6 #include "math_support.h"
   7 #include "math_parser.h"
   8 #include "math_mathmlstream.h"
   9
  10
  11 MathDecorationInset::MathDecorationInset(string const & name)
  12         : MathNestInset(1), name_(name)
  13 {}
  14
  15
  16 MathInset * MathDecorationInset::clone() const
  17 {
  18         return new MathDecorationInset(*this);
  19 }
  20
  21
  22 bool MathDecorationInset::upper() const
  23 {
  24         return name_ != "underline" && name_ != "underbrace";
  25 }
  26
  27
  28 bool MathDecorationInset::isScriptable() const
  29 {
  30         return
  31                         name_ == "overbrace" ||
  32                         name_ == "underbrace" ||
  33                         name_ == "overleftarrow" ||
  34                         name_ == "overrightarrow";
  35 }
  36
  37
  38 bool MathDecorationInset::protect() const
  39 {
  40         return
  41                         name_ == "overbrace" ||
  42                         name_ == "underbrace" ||
  43                         name_ == "overleftarrow" ||
  44                         name_ == "overrightarrow";
  45 }
  46
  47
  48 bool MathDecorationInset::wide() const
  49 {
  50         return
  51                         name_ == "overline" ||
  52                         name_ == "underline" ||
  53                         name_ == "overbrace" ||
  54                         name_ == "underbrace" ||
  55                         name_ == "overleftarrow" ||
  56                         name_ == "overrightarrow" ||
  57                         name_ == "widehat" ||
  58                         name_ == "widetilde";
  59 }
  60
  61
  62 void MathDecorationInset::metrics(MathMetricsInfo const & st) const
  63 {
  64         xcell(0).metrics(st);
  65         size_    = st;
  66         width_   = xcell(0).width();
  67         ascent_  = xcell(0).ascent();
  68         descent_ = xcell(0).descent();
  69
  70         dh_ = 5; //mathed_char_height(LM_TC_VAR, size(), 'I', ascent_, descent_);
  71
  72         if (upper()) {
  73                 dy_ = -ascent_ - dh_;
  74                 ascent_ += dh_ + 1;
  75         } else {
  76                 dy_ = descent_ + 1;
  77                 descent_ += dh_ + 2;
  78         }
  79 }
  80
  81
  82 void MathDecorationInset::draw(Painter & pain, int x, int y) const
  83 {
  84         xcell(0).draw(pain, x, y);
  85         if (wide())
  86                 mathed_draw_deco(pain, x, y + dy_, width_, dh_, name_);
  87         else {
  88                 int w = 2 + mathed_char_width(LM_TC_VAR, size_, 'x');
  89                 mathed_draw_deco(pain, x + (width_ - w) / 2, y + dy_, w, dh_, name_);
  90         }
  91 }
  92
  93
  94 void MathDecorationInset::write(MathWriteInfo & os) const
  95 {
  96         if (os.fragile && protect())
  97                 os << "\\protect";
  98         os << '\\' << name_.c_str() << '{' << cell(0) << '}';
  99 }
 100
 101
 102 void MathDecorationInset::writeNormal(NormalStream & os) const
 103 {
 104         os << "[deco " << name_.c_str() << ' ' <<  cell(0) << ']';
 105 }