src/mathed/InsetMathBig.cpp

   1 /**
   2  * \file InsetMathBig.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathBig.h"
  14
  15 #include "MathSupport.h"
  16 #include "MathStream.h"
  17 #include "MetricsInfo.h"
  18
  19 #include "frontends/FontMetrics.h"
  20
  21 #include "support/docstream.h"
  22 #include "support/lstrings.h"
  23
  24
  25 namespace lyx {
  26
  27
  28 InsetMathBig::InsetMathBig(docstring const & name, docstring const & delim)
  29         : name_(name), delim_(delim)
  30 {}
  31
  32
  33 docstring InsetMathBig::name() const
  34 {
  35         return name_;
  36 }
  37
  38
  39 Inset * InsetMathBig::clone() const
  40 {
  41         return new InsetMathBig(*this);
  42 }
  43
  44
  45 InsetMathBig::size_type InsetMathBig::size() const
  46 {
  47         // order: big Big bigg Bigg biggg Biggg
  48         //        0   1   2    3    4     5
  49         return name_[0] == 'B' ?
  50                 2 * (name_.size() - 4) + 1:
  51                 2 * (name_.size() - 4);
  52 }
  53
  54
  55 double InsetMathBig::increase() const
  56 {
  57         // The formula used in amsmath.sty is
  58         // 1.2 * (1.0 + size() * 0.5) - 1.0.
  59         // We use a smaller step and a bigger offset because our base size
  60         // is different.
  61         return (size() + 1) * 0.3;
  62 }
  63
  64
  65 void InsetMathBig::metrics(MetricsInfo & mi, Dimension & dim) const
  66 {
  67         double const h = theFontMetrics(mi.base.font).ascent('I');
  68         double const f = increase();
  69         dim.wid = 6;
  70         dim.asc = int(h + f * h);
  71         dim.des = int(f * h);
  72 }
  73
  74
  75 void InsetMathBig::draw(PainterInfo & pi, int x, int y) const
  76 {
  77         Dimension const dim = dimension(*pi.base.bv);
  78         // mathed_draw_deco does not use the leading backslash, so remove it
  79         // (but don't use ltrim if this is the backslash delimiter).
  80         // Replace \| by \Vert (equivalent in LaTeX), since mathed_draw_deco
  81         // would treat it as |.
  82         docstring const delim = (delim_ == "\\|") ?  from_ascii("Vert") :
  83                 (delim_ == "\\\\") ? from_ascii("\\") : support::ltrim(delim_, "\\");
  84         mathed_draw_deco(pi, x + 1, y - dim.ascent(), 4, dim.height(),
  85                          delim);
  86         setPosCache(pi, x, y);
  87 }
  88
  89
  90 void InsetMathBig::write(WriteStream & os) const
  91 {
  92         MathEnsurer ensurer(os);
  93         os << '\\' << name_ << delim_;
  94         if (delim_[0] == '\\')
  95                 os.pendingSpace(true);
  96 }
  97
  98
  99 void InsetMathBig::normalize(NormalStream & os) const
 100 {
 101         os << '[' << name_ << ' ' << delim_ << ']';
 102 }
 103
 104
 105 void InsetMathBig::infoize2(odocstream & os) const
 106 {
 107         os << name_;
 108 }
 109
 110
 111 bool InsetMathBig::isBigInsetDelim(docstring const & delim)
 112 {
 113         // mathed_draw_deco must handle these
 114         static char const * const delimiters[] = {
 115                 "(", ")", "\\{", "\\}", "\\lbrace", "\\rbrace", "[", "]",
 116                 "|", "/", "\\slash", "\\|", "\\vert", "\\Vert", "'",
 117                 "\\\\", "\\backslash",
 118                 "\\langle", "\\lceil", "\\lfloor",
 119                 "\\rangle", "\\rceil", "\\rfloor",
 120                 "\\downarrow", "\\Downarrow",
 121                 "\\uparrow", "\\Uparrow",
 122                 "\\updownarrow", "\\Updownarrow", ""
 123         };
 124         return support::findToken(delimiters, to_utf8(delim)) >= 0;
 125 }
 126
 127
 128 } // namespace lyx