src/mathed/math_decorationinset.C

   1 #ifdef __GNUG__
   2 #pragma implementation
   3 #endif
   4
   5 #include "math_decorationinset.h"
   6 #include "mathed/support.h"
   7 #include "math_parser.h"
   8 #include "support/LOstream.h"
   9
  10
  11 using std::ostream;
  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_ != "underline" && name_ != "underbrace";
  28 }
  29
  30
  31 bool MathDecorationInset::isScriptable() const
  32 {
  33         return
  34                         name_ == "overbrace" ||
  35                         name_ == "underbrace" ||
  36                         name_ == "overleftarrow" ||
  37                         name_ == "overrightarrow";
  38 }
  39
  40
  41 bool MathDecorationInset::protect() const
  42 {
  43         return
  44                         name_ == "overbrace" ||
  45                         name_ == "underbrace" ||
  46                         name_ == "overleftarrow" ||
  47                         name_ == "overrightarrow";
  48 }
  49
  50
  51 bool MathDecorationInset::wide() const
  52 {
  53         return
  54                         name_ == "overline" ||
  55                         name_ == "underline" ||
  56                         name_ == "overbrace" ||
  57                         name_ == "underbrace" ||
  58                         name_ == "overleftarrow" ||
  59                         name_ == "overrightarrow" ||
  60                         name_ == "widehat" ||
  61                         name_ == "widetilde";
  62 }
  63
  64
  65 void MathDecorationInset::metrics(MathMetricsInfo const & st) const
  66 {
  67         xcell(0).metrics(st);
  68         size_    = st;
  69         width_   = xcell(0).width();
  70         ascent_  = xcell(0).ascent();
  71         descent_ = xcell(0).descent();
  72
  73         dh_ = 5; //mathed_char_height(LM_TC_VAR, size(), 'I', ascent_, descent_);
  74
  75         if (upper()) {
  76                 dy_ = -ascent_ - dh_;
  77                 ascent_ += dh_ + 1;
  78         } else {
  79                 dy_ = descent_ + 1;
  80                 descent_ += dh_ + 2;
  81         }
  82 }
  83
  84
  85 void MathDecorationInset::draw(Painter & pain, int x, int y) const
  86 {
  87         xo(x);
  88         yo(x);
  89         xcell(0).draw(pain, x, y);
  90         if (wide())
  91                 mathed_draw_deco(pain, x, y + dy_, width_, dh_, name_);
  92         else {
  93                 int w = 2 + mathed_char_width(LM_TC_VAR, size(), 'x');
  94                 mathed_draw_deco(pain, x + (width_ - w) / 2, y + dy_, w, dh_, name_);
  95         }
  96 }
  97
  98
  99 void MathDecorationInset::write(MathWriteInfo & os) const
 100 {
 101         if (os.fragile && protect())
 102                 os << "\\protect";
 103         os << '\\' << name_ << '{' << cell(0) << '}';
 104 }
 105
 106
 107 void MathDecorationInset::writeNormal(ostream & os) const
 108 {
 109         os << "[" << name_ << " ";
 110         cell(0).writeNormal(os);
 111         os << "] ";
 112 }