src/mathed/math_symbolinset.C

   1 #include "math_symbolinset.h"
   2 #include "math_parser.h"
   3 #include "support.h"
   4 #include "support/LOstream.h"
   5
   6
   7 using std::ostream;
   8
   9 MathSymbolInset::MathSymbolInset(const latexkeys * l)
  10         : sym_(l), h_(0) {}
  11
  12
  13 MathInset * MathSymbolInset::clone() const
  14 {
  15         return new MathSymbolInset(*this);
  16 }
  17
  18
  19 void MathSymbolInset::write(ostream & os, bool /* fragile */) const
  20 {
  21         os << '\\' << sym_->name << ' ';
  22 }
  23
  24
  25 void MathSymbolInset::writeNormal(ostream & os) const
  26 {
  27         os << "[" << sym_->name << "] ";
  28 }
  29
  30
  31 MathTextCodes MathSymbolInset::code() const
  32 {
  33         switch(sym_->token) {
  34         case LM_TK_CMR:
  35                 return LM_TC_CMR;
  36         case LM_TK_CMSY:
  37                 return LM_TC_CMSY;
  38         case LM_TK_CMM:
  39                 return LM_TC_CMM;
  40         case LM_TK_CMEX:
  41                 return LM_TC_CMEX;
  42         case LM_TK_MSA:
  43                 return LM_TC_MSA;
  44         case LM_TK_MSB:
  45                 return LM_TC_MSB;
  46         default:
  47                 return LM_TC_SYMB;
  48         }
  49 }
  50
  51
  52 MathTextCodes MathSymbolInset::code2() const
  53 {
  54         if (sym_->token == LM_TK_CMEX)
  55                 return LM_TC_BOLDSYMB;
  56         else
  57                 return LM_TC_SYMB;
  58 }
  59
  60
  61 void MathSymbolInset::metrics(MathStyles st) const
  62 {
  63         size_ = st;
  64         MathTextCodes Code = code();
  65         if (sym_->latex_font_id > 0 && math_font_available(Code)) {
  66                 mathed_char_dim(Code, size_, sym_->latex_font_id,
  67                                 ascent_, descent_, width_);
  68                 if (Code == LM_TC_CMEX) {
  69                         h_ = 4*descent_/5;
  70                         ascent_  += h_;
  71                         descent_ -= h_;
  72                 }
  73         } else if (sym_->id > 0 && sym_->id < 255 &&
  74                    math_font_available(LM_TC_SYMB)) {
  75                 mathed_char_dim(code2(), size_, sym_->id,
  76                                 ascent_, descent_, width_);
  77         } else {
  78                 mathed_string_dim(LM_TC_TEX, size_, sym_->name, ascent_, descent_, width_);
  79         }
  80 }
  81
  82
  83 void MathSymbolInset::draw(Painter & pain, int x, int y) const
  84 {
  85         xo(x);
  86         yo(y);
  87         MathTextCodes Code = code();
  88         if (sym_->latex_font_id > 0 && math_font_available(Code))
  89                 drawChar(pain, Code, size_, x, y - h_, sym_->latex_font_id);
  90         else if (sym_->id > 0 && sym_->id < 255 &&
  91                  math_font_available(LM_TC_SYMB))
  92                 drawChar(pain, code2(), size_, x, y, sym_->id);
  93         else
  94                 drawStr(pain, LM_TC_TEX, size_, x, y, sym_->name);
  95 }
  96
  97
  98 bool MathSymbolInset::isRelOp() const
  99 {
 100         return sym_->type == LMB_RELATION;
 101 }
 102
 103
 104 bool MathSymbolInset::isScriptable() const
 105 {
 106         return size_ == LM_ST_DISPLAY && sym_->token == LM_TK_CMEX;
 107 }
 108
 109
 110 bool MathSymbolInset::takesLimits() const
 111 {
 112         return sym_->token == LM_TK_CMEX;
 113 }