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