src/mathed/math_metricsinfo.C

   1
   2 #include <config.h>
   3
   4 #include "math_metricsinfo.h"
   5 #include "math_support.h"
   6 #include "debug.h"
   7 #include "frontends/Painter.h"
   8
   9
  10
  11 MathMetricsBase::MathMetricsBase()
  12         : font(), style(LM_ST_TEXT), fontname("mathnormal"),
  13           restrictwidth(false), textwidth(0)
  14 {}
  15
  16
  17
  18
  19 MathMetricsInfo::MathMetricsInfo()
  20         : fullredraw(false)
  21 {}
  22
  23
  24
  25
  26 MathPainterInfo::MathPainterInfo(Painter & p)
  27         : pain(p)
  28 {}
  29
  30
  31 void MathPainterInfo::draw(int x, int y, char c)
  32 {
  33         pain.text(x, y, c, base.font);
  34 }
  35
  36
  37 MathStyles smallerScriptStyle(MathStyles st)
  38 {
  39         switch (st) {
  40                 case LM_ST_DISPLAY:
  41                 case LM_ST_TEXT:
  42                         return LM_ST_SCRIPT;
  43                 case LM_ST_SCRIPT:
  44                 case LM_ST_SCRIPTSCRIPT:
  45                         return LM_ST_SCRIPTSCRIPT;
  46         }
  47         // shut up compiler
  48         lyxerr << "should not happen\n";
  49         return LM_ST_DISPLAY;
  50 }
  51
  52
  53 MathScriptChanger::MathScriptChanger(MathMetricsBase & mb)
  54         : MathStyleChanger(mb, smallerScriptStyle(mb.style))
  55 {}
  56
  57
  58
  59 MathStyles smallerFracStyle(MathStyles st)
  60 {
  61         switch (st) {
  62                 case LM_ST_DISPLAY:
  63                         return LM_ST_TEXT;
  64                 case LM_ST_TEXT:
  65                         return LM_ST_SCRIPT;
  66                 case LM_ST_SCRIPT:
  67                 case LM_ST_SCRIPTSCRIPT:
  68                         return LM_ST_SCRIPTSCRIPT;
  69         }
  70         // shut up compiler
  71         lyxerr << "should not happen\n";
  72         return LM_ST_DISPLAY;
  73 }
  74
  75
  76 MathFracChanger::MathFracChanger(MathMetricsBase & mb)
  77         : MathStyleChanger(mb, smallerFracStyle(mb.style))
  78 {}
  79
  80
  81
  82 MathShapeChanger::MathShapeChanger(LyXFont & font, LyXFont::FONT_SHAPE shape)
  83         : MathChanger<LyXFont, LyXFont::FONT_SHAPE>(font)
  84 {
  85         save_ = orig_.shape();
  86         orig_.setShape(shape);
  87 }
  88
  89 MathShapeChanger::~MathShapeChanger()
  90 {
  91         orig_.setShape(save_);
  92 }
  93
  94
  95
  96
  97 MathStyleChanger::MathStyleChanger(MathMetricsBase & mb, MathStyles style)
  98         :       MathChanger<MathMetricsBase>(mb)
  99 {
 100         static const int diff[4][4]  = { { 0, 0, -3, -5 },
 101                                          { 0, 0, -3, -5 },
 102                                          { 3, 3,  0, -2 },
 103                                          { 5, 5,  2,  0 } };
 104         save_ = mb;
 105         int t = diff[mb.style][style];
 106         if (t > 0)
 107                 while (t--)
 108                         mb.font.incSize();
 109         else
 110                 while (t++)
 111                         mb.font.decSize();
 112         mb.style = style;
 113 }
 114
 115
 116 MathStyleChanger::~MathStyleChanger()
 117 {
 118         orig_ = save_;
 119 }
 120
 121
 122
 123
 124 MathFontSetChanger::MathFontSetChanger(MathMetricsBase & mb, char const * name)
 125         :       MathChanger<MathMetricsBase>(mb)
 126 {
 127         save_ = mb;
 128         mb.fontname = name;
 129         augmentFont(mb.font, name);
 130 }
 131
 132 MathFontSetChanger::~MathFontSetChanger()
 133 {
 134         orig_ = save_;
 135 }
 136
 137
 138 MathWidthChanger::MathWidthChanger(MathMetricsBase & mb, int w)
 139         :       MathChanger<MathMetricsBase>(mb)
 140 {
 141         save_ = mb;
 142         mb.restrictwidth = true;
 143         mb.textwidth     = w;
 144 }
 145
 146
 147 MathWidthChanger::~MathWidthChanger()
 148 {
 149         orig_ = save_;
 150 }
 151