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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)), fontname("mathnormal"),
41           textwidth(w), macro_nesting(0),
42           solid_line_thickness_(1), solid_line_offset_(1), 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                 font.setStyle(rc->old.font.style());
75                 if (name != "lyxtex"
76                     && ((isTextFont(oldname) && oldcolor != Color_foreground)
77                         || (isMathFont(oldname) && oldcolor != Color_math)))
78                         font.setColor(oldcolor);
79         }
80         return move(rc);
81 }
82
83
84 /////////////////////////////////////////////////////////////////////////
85 //
86 // MetricsInfo
87 //
88 /////////////////////////////////////////////////////////////////////////
89
90 MetricsInfo::MetricsInfo(BufferView * bv, FontInfo font, int textwidth,
91                          MacroContext const & mc)
92         : base(bv, font, textwidth), macrocontext(mc)
93 {}
94
95
96 /////////////////////////////////////////////////////////////////////////
97 //
98 // PainterInfo
99 //
100 /////////////////////////////////////////////////////////////////////////
101
102 PainterInfo::PainterInfo(BufferView * bv, lyx::frontend::Painter & painter)
103         : pain(painter), ltr_pos(false), change_(), selected(false),
104         do_spellcheck(true), full_repaint(true), background_color(Color_background)
105 {
106         base.bv = bv;
107 }
108
109
110 void PainterInfo::draw(int x, int y, char_type c)
111 {
112         pain.text(x, y, c, base.font);
113 }
114
115
116 void PainterInfo::draw(int x, int y, docstring const & str)
117 {
118         pain.text(x, y, str, base.font);
119 }
120
121
122 ColorCode PainterInfo::backgroundColor(Inset const * inset, bool sel) const
123 {
124         ColorCode const color_bg = inset->backgroundColor(*this);
125
126         if (selected && sel)
127                 // This inset is in a selection
128                 return Color_selection;
129         else {
130                 if (color_bg != Color_none)
131                         // This inset has its own color
132                         return color_bg;
133                 else {
134                         if (background_color == Color_none)
135                                 // This inset has no own color and does not inherit a color
136                                 return Color_background;
137                         else
138                                 // This inset has no own color, but inherits a color
139                                 return background_color;
140                 }
141         }
142 }
143
144
145 Color PainterInfo::textColor(Color const & color) const
146 {
147         if (change_.changed()) 
148                 return change_.color();
149         if (selected)
150                 return Color_selectiontext;
151         return color;
152 }
153
154
155 Changer MetricsBase::changeScript(bool cond)
156 {
157         switch (font.style()) {
158         case LM_ST_DISPLAY:
159         case LM_ST_TEXT:
160                 return font.changeStyle(LM_ST_SCRIPT, cond);
161         case LM_ST_SCRIPT:
162         case LM_ST_SCRIPTSCRIPT:
163                 return font.changeStyle(LM_ST_SCRIPTSCRIPT, cond);
164         }
165         //remove Warning
166         LASSERT(false, return Changer());
167 }
168
169
170 Changer MetricsBase::changeFrac(bool cond)
171 {
172         switch (font.style()) {
173         case LM_ST_DISPLAY:
174                 return font.changeStyle(LM_ST_TEXT, cond);
175         case LM_ST_TEXT:
176                 return font.changeStyle(LM_ST_SCRIPT, cond);
177         case LM_ST_SCRIPT:
178         case LM_ST_SCRIPTSCRIPT:
179                 return font.changeStyle(LM_ST_SCRIPTSCRIPT, cond);
180         }
181         //remove Warning
182         return Changer();
183 }
184
185
186 } // namespace lyx