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 "ColorSet.h"
  15 #include "LyXRC.h"
  16 #include "MetricsInfo.h"
  17
  18 #include "insets/Inset.h"
  19
  20 #include "mathed/MathSupport.h"
  21
  22 #include "frontends/Painter.h"
  23
  24 #include "support/docstring.h"
  25 #include "support/lassert.h"
  26 #include "support/RefChanger.h"
  27
  28 using namespace std;
  29
  30
  31 namespace lyx {
  32
  33 /////////////////////////////////////////////////////////////////////////
  34 //
  35 // MetricsBase
  36 //
  37 /////////////////////////////////////////////////////////////////////////
  38
  39 MetricsBase::MetricsBase(BufferView * b, FontInfo f, int w)
  40         : bv(b), font(move(f)), style(LM_ST_TEXT), fontname("mathnormal"),
  41           textwidth(w), solid_line_thickness_(1), solid_line_offset_(1),
  42           dotted_line_thickness_(1)
  43 {
  44         if (lyxrc.zoom >= 200) {
  45                 // derive the line thickness from zoom factor
  46                 // the zoom is given in percent
  47                 // (increase thickness at 250%, 450% etc.)
  48                 solid_line_thickness_ = (lyxrc.zoom + 150) / 200;
  49                 // adjust line_offset_ too
  50                 solid_line_offset_ = 1 + solid_line_thickness_ / 2;
  51         }
  52         if (lyxrc.zoom >= 100) {
  53                 // derive the line thickness from zoom factor
  54                 // the zoom is given in percent
  55                 // (increase thickness at 150%, 250% etc.)
  56                 dotted_line_thickness_ = (lyxrc.zoom + 50) / 100;
  57         }
  58 }
  59
  60
  61 Changer MetricsBase::changeFontSet(string const & name, bool cond)
  62 {
  63         RefChanger<MetricsBase> rc = make_save(*this);
  64         if (!cond)
  65                 rc->keep();
  66         else {
  67                 ColorCode oldcolor = font.color();
  68                 string const oldname = fontname;
  69                 fontname = name;
  70                 if (isMathFont(name) || isMathFont(oldname))
  71                         font = sane_font;
  72                 augmentFont(font, name);
  73                 font.setSize(rc->old.font.size());
  74                 if (name != "lyxtex"
  75                     && ((isTextFont(oldname) && oldcolor != Color_foreground)
  76                         || (isMathFont(oldname) && oldcolor != Color_math)))
  77                         font.setColor(oldcolor);
  78         }
  79         return move(rc);
  80 }
  81
  82
  83 /////////////////////////////////////////////////////////////////////////
  84 //
  85 // MetricsInfo
  86 //
  87 /////////////////////////////////////////////////////////////////////////
  88
  89 MetricsInfo::MetricsInfo(BufferView * bv, FontInfo font, int textwidth,
  90                          MacroContext const & mc)
  91         : base(bv, font, textwidth), macrocontext(mc)
  92 {}
  93
  94
  95 /////////////////////////////////////////////////////////////////////////
  96 //
  97 // PainterInfo
  98 //
  99 /////////////////////////////////////////////////////////////////////////
 100
 101 PainterInfo::PainterInfo(BufferView * bv, lyx::frontend::Painter & painter)
 102         : pain(painter), ltr_pos(false), change_(), selected(false),
 103         do_spellcheck(true), full_repaint(true), background_color(Color_background)
 104 {
 105         base.bv = bv;
 106 }
 107
 108
 109 void PainterInfo::draw(int x, int y, char_type c)
 110 {
 111         pain.text(x, y, c, base.font);
 112 }
 113
 114
 115 void PainterInfo::draw(int x, int y, docstring const & str)
 116 {
 117         pain.text(x, y, str, base.font);
 118 }
 119
 120
 121 ColorCode PainterInfo::backgroundColor(Inset const * inset, bool sel) const
 122 {
 123         ColorCode const color_bg = inset->backgroundColor(*this);
 124
 125         if (selected && sel)
 126                 // This inset is in a selection
 127                 return Color_selection;
 128         else {
 129                 if (color_bg != Color_none)
 130                         // This inset has its own color
 131                         return color_bg;
 132                 else {
 133                         if (background_color == Color_none)
 134                                 // This inset has no own color and does not inherit a color
 135                                 return Color_background;
 136                         else
 137                                 // This inset has no own color, but inherits a color
 138                                 return background_color;
 139                 }
 140         }
 141 }
 142
 143
 144 Color PainterInfo::textColor(Color const & color) const
 145 {
 146         if (change_.changed())
 147                 return change_.color();
 148         if (selected)
 149                 return Color_selectiontext;
 150         return color;
 151 }
 152
 153
 154 Changer MetricsBase::changeScript(bool cond)
 155 {
 156         switch (style) {
 157         case LM_ST_DISPLAY:
 158         case LM_ST_TEXT:
 159                 return changeStyle(LM_ST_SCRIPT, cond);
 160         case LM_ST_SCRIPT:
 161         case LM_ST_SCRIPTSCRIPT:
 162                 return changeStyle(LM_ST_SCRIPTSCRIPT, cond);
 163         }
 164         //remove Warning
 165         LASSERT(false, return Changer());
 166 }
 167
 168
 169 Changer MetricsBase::changeFrac(bool cond)
 170 {
 171         switch (style) {
 172         case LM_ST_DISPLAY:
 173                 return changeStyle(LM_ST_TEXT, cond);
 174         case LM_ST_TEXT:
 175                 return changeStyle(LM_ST_SCRIPT, cond);
 176         case LM_ST_SCRIPT:
 177         case LM_ST_SCRIPTSCRIPT:
 178                 return changeStyle(LM_ST_SCRIPTSCRIPT, cond);
 179         }
 180         //remove Warning
 181         return Changer();
 182 }
 183
 184
 185 Changer MetricsBase::changeStyle(Styles new_style, bool cond)
 186 {
 187         static const int diff[4][4] =
 188                 { { 0, 0, -3, -5 },
 189                   { 0, 0, -3, -5 },
 190                   { 3, 3,  0, -2 },
 191                   { 5, 5,  2,  0 } };
 192         int t = diff[style][new_style];
 193         RefChanger<MetricsBase> rc = make_save(*this);
 194         if (!cond)
 195                 rc->keep();
 196         else {
 197                 if (t > 0)
 198                         while (t--)
 199                                 font.incSize();
 200                 else
 201                         while (t++)
 202                                 font.decSize();
 203                 style = new_style;
 204         }
 205         return move(rc);
 206 }
 207
 208
 209 } // namespace lyx