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()
  40         : bv(0), font(), style(LM_ST_TEXT), fontname("mathnormal"), textwidth(0),
  41           solid_line_thickness_(1), solid_line_offset_(1), dotted_line_thickness_(1)
  42 {
  43         if (lyxrc.zoom >= 200) {
  44                 // derive the line thickness from zoom factor
  45                 // the zoom is given in percent
  46                 // (increase thickness at 250%, 450% etc.)
  47                 solid_line_thickness_ = (lyxrc.zoom + 50) / 200;
  48                 // adjust line_offset_ too
  49                 solid_line_offset_ = 1 + solid_line_thickness_ / 2;
  50         }
  51         if (lyxrc.zoom >= 100) {
  52                 // derive the line thickness from zoom factor
  53                 // the zoom is given in percent
  54                 // (increase thickness at 150%, 250% etc.)
  55                 dotted_line_thickness_ = (lyxrc.zoom + 50) / 100;
  56         }
  57 }
  58
  59
  60 MetricsBase::MetricsBase(BufferView * b, FontInfo f, int w)
  61         : MetricsBase()
  62 {
  63         bv = b;
  64         font = f;
  65         textwidth = w;
  66 }
  67
  68
  69 Changer MetricsBase::changeFontSet(docstring const & name, bool cond)
  70 {
  71         RefChanger<MetricsBase> rc = make_save(*this);
  72         if (!cond)
  73                 rc->keep();
  74         else {
  75                 ColorCode oldcolor = font.color();
  76                 docstring const oldname = from_ascii(fontname);
  77                 fontname = to_utf8(name);
  78                 font = sane_font;
  79                 augmentFont(font, name);
  80                 font.setSize(rc->old.font.size());
  81                 if (name != "lyxtex"
  82                     && ((isTextFont(oldname) && oldcolor != Color_foreground)
  83                         || (isMathFont(oldname) && oldcolor != Color_math)))
  84                         font.setColor(oldcolor);
  85         }
  86         return move(rc);
  87 }
  88
  89
  90 Changer MetricsBase::changeFontSet(char const * name, bool cond)
  91 {
  92         return changeFontSet(from_ascii(name), cond);
  93 }
  94
  95
  96 /////////////////////////////////////////////////////////////////////////
  97 //
  98 // MetricsInfo
  99 //
 100 /////////////////////////////////////////////////////////////////////////
 101
 102 MetricsInfo::MetricsInfo(BufferView * bv, FontInfo font, int textwidth,
 103                          MacroContext const & mc)
 104         : base(bv, font, textwidth), macrocontext(mc)
 105 {}
 106
 107
 108 /////////////////////////////////////////////////////////////////////////
 109 //
 110 // PainterInfo
 111 //
 112 /////////////////////////////////////////////////////////////////////////
 113
 114 PainterInfo::PainterInfo(BufferView * bv, lyx::frontend::Painter & painter)
 115         : pain(painter), ltr_pos(false), change_(), selected(false),
 116         do_spellcheck(true), full_repaint(true), background_color(Color_background)
 117 {
 118         base.bv = bv;
 119 }
 120
 121
 122 void PainterInfo::draw(int x, int y, char_type c)
 123 {
 124         pain.text(x, y, c, base.font);
 125 }
 126
 127
 128 void PainterInfo::draw(int x, int y, docstring const & str)
 129 {
 130         pain.text(x, y, str, base.font);
 131 }
 132
 133
 134 ColorCode PainterInfo::backgroundColor(Inset const * inset, bool sel) const
 135 {
 136         ColorCode const color_bg = inset->backgroundColor(*this);
 137
 138         if (selected && sel)
 139                 // This inset is in a selection
 140                 return Color_selection;
 141         else {
 142                 if (color_bg != Color_none)
 143                         // This inset has its own color
 144                         return color_bg;
 145                 else {
 146                         if (background_color == Color_none)
 147                                 // This inset has no own color and does not inherit a color
 148                                 return Color_background;
 149                         else
 150                                 // This inset has no own color, but inherits a color
 151                                 return background_color;
 152                 }
 153         }
 154 }
 155
 156
 157 Color PainterInfo::textColor(Color const & color) const
 158 {
 159         if (change_.changed())
 160                 return change_.color();
 161         if (selected)
 162                 return Color_selectiontext;
 163         return color;
 164 }
 165
 166
 167 Changer MetricsBase::changeScript(bool cond)
 168 {
 169         switch (style) {
 170         case LM_ST_DISPLAY:
 171         case LM_ST_TEXT:
 172                 return changeStyle(LM_ST_SCRIPT, cond);
 173         case LM_ST_SCRIPT:
 174         case LM_ST_SCRIPTSCRIPT:
 175                 return changeStyle(LM_ST_SCRIPTSCRIPT, cond);
 176         }
 177         //remove Warning
 178         LASSERT(false, return Changer());
 179 }
 180
 181
 182 Changer MetricsBase::changeFrac(bool cond)
 183 {
 184         switch (style) {
 185         case LM_ST_DISPLAY:
 186                 return changeStyle(LM_ST_TEXT, cond);
 187         case LM_ST_TEXT:
 188                 return changeStyle(LM_ST_SCRIPT, cond);
 189         case LM_ST_SCRIPT:
 190         case LM_ST_SCRIPTSCRIPT:
 191                 return changeStyle(LM_ST_SCRIPTSCRIPT, cond);
 192         }
 193         //remove Warning
 194         return Changer();
 195 }
 196
 197
 198 Changer MetricsBase::changeStyle(Styles new_style, bool cond)
 199 {
 200         static const int diff[4][4] =
 201                 { { 0, 0, -3, -5 },
 202                   { 0, 0, -3, -5 },
 203                   { 3, 3,  0, -2 },
 204                   { 5, 5,  2,  0 } };
 205         int t = diff[style][new_style];
 206         RefChanger<MetricsBase> rc = make_save(*this);
 207         if (!cond)
 208                 rc->keep();
 209         else {
 210                 if (t > 0)
 211                         while (t--)
 212                                 font.incSize();
 213                 else
 214                         while (t++)
 215                                 font.decSize();
 216                 style = new_style;
 217         }
 218         return move(rc);
 219 }
 220
 221
 222 } // namespace lyx