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 MathScriptChanger::MathScriptChanger(MathMetricsBase & mb)
  53         : MathStyleChanger(mb, smallerScriptStyle(mb.style))
  54 {}
  55
  56
  57
  58 MathStyles smallerFracStyle(MathStyles st)
  59 {
  60         switch (st) {
  61                 case LM_ST_DISPLAY:
  62                         return LM_ST_TEXT;
  63                 case LM_ST_TEXT:
  64                         return LM_ST_SCRIPT;
  65                 case LM_ST_SCRIPT:
  66                 case LM_ST_SCRIPTSCRIPT:
  67                         return LM_ST_SCRIPTSCRIPT;
  68         }
  69         // shut up compiler
  70         lyxerr << "should not happen\n";
  71         return LM_ST_DISPLAY;
  72 }
  73
  74 MathFracChanger::MathFracChanger(MathMetricsBase & mb)
  75         : MathStyleChanger(mb, smallerFracStyle(mb.style))
  76 {}
  77
  78
  79
  80 MathShapeChanger::MathShapeChanger(LyXFont & font, LyXFont::FONT_SHAPE shape)
  81         : MathChanger<LyXFont, LyXFont::FONT_SHAPE>(font)
  82 {
  83         save_ = orig_.shape();
  84         orig_.setShape(shape);
  85 }
  86
  87 MathShapeChanger::~MathShapeChanger()
  88 {
  89         orig_.setShape(save_);
  90 }
  91
  92
  93
  94 MathStyleChanger::MathStyleChanger(MathMetricsBase & mb, MathStyles style)
  95         :       MathChanger<MathMetricsBase>(mb)
  96 {
  97         static const int diff[4][4]  = { { 0, 0, -3, -5 },
  98                                          { 0, 0, -3, -5 },
  99                                          { 3, 3,  0, -2 },
 100                                          { 5, 5,  2,  0 } };
 101         save_ = mb;
 102         int t = diff[mb.style][style];
 103         if (t > 0)
 104                 while (t--)
 105                         mb.font.incSize();
 106         else
 107                 while (t++)
 108                         mb.font.decSize();
 109         mb.style = style;
 110 }
 111
 112 MathStyleChanger::~MathStyleChanger()
 113 {
 114         orig_ = save_;
 115 }
 116
 117
 118
 119 MathFontSetChanger::MathFontSetChanger(MathMetricsBase & mb, char const * name)
 120         :       MathChanger<MathMetricsBase>(mb)
 121 {
 122         save_ = mb;
 123         mb.fontname = name;
 124         augmentFont(mb.font, name);
 125 }
 126
 127 MathFontSetChanger::~MathFontSetChanger()
 128 {
 129         orig_ = save_;
 130 }
 131
 132
 133 MathWidthChanger::MathWidthChanger(MathMetricsBase & mb, int w)
 134         :       MathChanger<MathMetricsBase>(mb)
 135 {
 136         save_ = mb;
 137         mb.restrictwidth = true;
 138         mb.textwidth     = w;
 139 }
 140
 141
 142 MathWidthChanger::~MathWidthChanger()
 143 {
 144         orig_ = save_;
 145 }
 146