src/mathed/math_metricsinfo.C

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