src/MetricsInfo.cpp

   1 /**
   2  * \file MetricsInfo.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 "BufferView.h"
  14 #include "Color.h"
  15 #include "MetricsInfo.h"
  16
  17 #include "mathed/MathSupport.h"
  18
  19 #include "frontends/Painter.h"
  20
  21 #include <boost/assert.hpp>
  22
  23
  24 namespace lyx {
  25
  26 using std::string;
  27
  28
  29 MetricsBase::MetricsBase()
  30         : bv(0), font(), style(LM_ST_TEXT), fontname("mathnormal"),
  31           textwidth(0)
  32 {}
  33
  34
  35 MetricsBase::MetricsBase(BufferView * b, Font const & f, int w)
  36         : bv(b), font(f), style(LM_ST_TEXT), fontname("mathnormal"),
  37           textwidth(w)
  38 {}
  39
  40
  41
  42 MetricsInfo::MetricsInfo()
  43 {}
  44
  45
  46 MetricsInfo::MetricsInfo(BufferView * bv, Font const & font, int textwidth)
  47         : base(bv, font, textwidth)
  48 {}
  49
  50
  51
  52 PainterInfo::PainterInfo(BufferView * bv, lyx::frontend::Painter & painter)
  53         : pain(painter), ltr_pos(false), erased_(false)
  54 {
  55         base.bv = bv;
  56 }
  57
  58
  59 void PainterInfo::draw(int x, int y, char_type c)
  60 {
  61         pain.text(x, y, c, base.font);
  62 }
  63
  64
  65 void PainterInfo::draw(int x, int y, docstring const & str)
  66 {
  67         pain.text(x, y, str, base.font);
  68 }
  69
  70
  71 Styles smallerScriptStyle(Styles st)
  72 {
  73         switch (st) {
  74                 case LM_ST_DISPLAY:
  75                 case LM_ST_TEXT:
  76                         return LM_ST_SCRIPT;
  77                 case LM_ST_SCRIPT:
  78                 case LM_ST_SCRIPTSCRIPT:
  79                 default: // shut up compiler
  80                         return LM_ST_SCRIPTSCRIPT;
  81         }
  82 }
  83
  84 ScriptChanger::ScriptChanger(MetricsBase & mb)
  85         : StyleChanger(mb, smallerScriptStyle(mb.style))
  86 {}
  87
  88
  89
  90 Styles smallerFracStyle(Styles st)
  91 {
  92         switch (st) {
  93                 case LM_ST_DISPLAY:
  94                         return LM_ST_TEXT;
  95                 case LM_ST_TEXT:
  96                         return LM_ST_SCRIPT;
  97                 case LM_ST_SCRIPT:
  98                 case LM_ST_SCRIPTSCRIPT:
  99                 default: // shut up compiler
 100                         return LM_ST_SCRIPTSCRIPT;
 101         }
 102 }
 103
 104
 105 FracChanger::FracChanger(MetricsBase & mb)
 106         : StyleChanger(mb, smallerFracStyle(mb.style))
 107 {}
 108
 109
 110
 111 ArrayChanger::ArrayChanger(MetricsBase & mb)
 112         : StyleChanger(mb, mb.style == LM_ST_DISPLAY ? LM_ST_TEXT : mb.style)
 113 {}
 114
 115
 116
 117 ShapeChanger::ShapeChanger(Font & font, Font::FONT_SHAPE shape)
 118         : Changer<Font, Font::FONT_SHAPE>(font)
 119 {
 120         save_ = orig_.shape();
 121         orig_.setShape(shape);
 122 }
 123
 124
 125 ShapeChanger::~ShapeChanger()
 126 {
 127         orig_.setShape(save_);
 128 }
 129
 130
 131
 132 StyleChanger::StyleChanger(MetricsBase & mb, Styles style)
 133         :       Changer<MetricsBase>(mb)
 134 {
 135         static const int diff[4][4] =
 136                 { { 0, 0, -3, -5 },
 137                   { 0, 0, -3, -5 },
 138                   { 3, 3,  0, -2 },
 139                   { 5, 5,  2,  0 } };
 140         save_ = mb;
 141         int t = diff[mb.style][style];
 142         if (t > 0)
 143                 while (t--)
 144                         mb.font.incSize();
 145         else
 146                 while (t++)
 147                         mb.font.decSize();
 148         mb.style = style;
 149 }
 150
 151
 152 StyleChanger::~StyleChanger()
 153 {
 154         orig_ = save_;
 155 }
 156
 157
 158
 159 FontSetChanger::FontSetChanger(MetricsBase & mb, char const * name)
 160         :       Changer<MetricsBase>(mb)
 161 {
 162         save_ = mb;
 163         Font::FONT_SIZE oldsize = save_.font.size();
 164         mb.fontname = name;
 165         mb.font = Font();
 166         augmentFont(mb.font, from_ascii(name));
 167         mb.font.setSize(oldsize);
 168 }
 169
 170
 171 FontSetChanger::FontSetChanger(MetricsBase & mb, docstring const & name)
 172         :       Changer<MetricsBase>(mb)
 173 {
 174         save_ = mb;
 175         Font::FONT_SIZE oldsize = save_.font.size();
 176         mb.fontname = to_utf8(name);
 177         mb.font = Font();
 178         augmentFont(mb.font, name);
 179         mb.font.setSize(oldsize);
 180 }
 181
 182
 183 FontSetChanger::~FontSetChanger()
 184 {
 185         orig_ = save_;
 186 }
 187
 188
 189 WidthChanger::WidthChanger(MetricsBase & mb, int w)
 190         :       Changer<MetricsBase>(mb)
 191 {
 192         save_ = mb;
 193         mb.textwidth = w;
 194 }
 195
 196
 197 WidthChanger::~WidthChanger()
 198 {
 199         orig_ = save_;
 200 }
 201
 202
 203
 204
 205 ColorChanger::ColorChanger(Font & font, string const & color)
 206         : Changer<Font, string>(font)
 207 {
 208         save_ = lcolor.getFromLyXName(color);
 209         font.setColor(lcolor.getFromLyXName(color));
 210 }
 211
 212
 213 ColorChanger::~ColorChanger()
 214 {
 215         orig_.setColor(lcolor.getFromLyXName(save_));
 216 }
 217
 218
 219 } // namespace lyx