ext/scintilla/src/Style.cxx

   1 // Scintilla source code edit control
   2 /** @file Style.cxx
   3  ** Defines the font and colour style for a class of text.
   4  **/
   5 // Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include <string.h>
   9
  10 #include "Platform.h"
  11
  12 #include "Scintilla.h"
  13 #include "Style.h"
  14
  15 #ifdef SCI_NAMESPACE
  16 using namespace Scintilla;
  17 #endif
  18
  19 FontAlias::FontAlias() {
  20 }
  21
  22 FontAlias::~FontAlias() {
  23         SetID(0);
  24         // ~Font will not release the actual font resource sine it is now 0
  25 }
  26
  27 void FontAlias::MakeAlias(Font &fontOrigin) {
  28         SetID(fontOrigin.GetID());
  29 }
  30
  31 void FontAlias::ClearFont() {
  32         SetID(0);
  33 }
  34
  35 bool FontSpecification::EqualTo(const FontSpecification &other) const {
  36         return bold == other.bold &&
  37                italic == other.italic &&
  38                size == other.size &&
  39                characterSet == other.characterSet &&
  40                fontName == other.fontName;
  41 }
  42
  43 FontMeasurements::FontMeasurements() {
  44         Clear();
  45 }
  46
  47 void FontMeasurements::Clear() {
  48         lineHeight = 2;
  49         ascent = 1;
  50         descent = 1;
  51         externalLeading = 0;
  52         aveCharWidth = 1;
  53         spaceWidth = 1;
  54         sizeZoomed = 2;
  55 }
  56
  57 Style::Style() : FontSpecification() {
  58         Clear(ColourDesired(0, 0, 0), ColourDesired(0xff, 0xff, 0xff),
  59               Platform::DefaultFontSize(), 0, SC_CHARSET_DEFAULT,
  60               false, false, false, false, caseMixed, true, true, false);
  61 }
  62
  63 Style::Style(const Style &source) : FontSpecification(), FontMeasurements() {
  64         Clear(ColourDesired(0, 0, 0), ColourDesired(0xff, 0xff, 0xff),
  65               0, 0, 0,
  66               false, false, false, false, caseMixed, true, true, false);
  67         fore.desired = source.fore.desired;
  68         back.desired = source.back.desired;
  69         characterSet = source.characterSet;
  70         bold = source.bold;
  71         italic = source.italic;
  72         size = source.size;
  73         eolFilled = source.eolFilled;
  74         underline = source.underline;
  75         caseForce = source.caseForce;
  76         visible = source.visible;
  77         changeable = source.changeable;
  78         hotspot = source.hotspot;
  79 }
  80
  81 Style::~Style() {
  82 }
  83
  84 Style &Style::operator=(const Style &source) {
  85         if (this == &source)
  86                 return * this;
  87         Clear(ColourDesired(0, 0, 0), ColourDesired(0xff, 0xff, 0xff),
  88               0, 0, SC_CHARSET_DEFAULT,
  89               false, false, false, false, caseMixed, true, true, false);
  90         fore.desired = source.fore.desired;
  91         back.desired = source.back.desired;
  92         characterSet = source.characterSet;
  93         bold = source.bold;
  94         italic = source.italic;
  95         size = source.size;
  96         eolFilled = source.eolFilled;
  97         underline = source.underline;
  98         caseForce = source.caseForce;
  99         visible = source.visible;
 100         changeable = source.changeable;
 101         return *this;
 102 }
 103
 104 void Style::Clear(ColourDesired fore_, ColourDesired back_, int size_,
 105         const char *fontName_, int characterSet_,
 106         bool bold_, bool italic_, bool eolFilled_,
 107         bool underline_, ecaseForced caseForce_,
 108         bool visible_, bool changeable_, bool hotspot_) {
 109         fore.desired = fore_;
 110         back.desired = back_;
 111         characterSet = characterSet_;
 112         bold = bold_;
 113         italic = italic_;
 114         size = size_;
 115         fontName = fontName_;
 116         eolFilled = eolFilled_;
 117         underline = underline_;
 118         caseForce = caseForce_;
 119         visible = visible_;
 120         changeable = changeable_;
 121         hotspot = hotspot_;
 122         font.ClearFont();
 123         FontMeasurements::Clear();
 124 }
 125
 126 void Style::ClearTo(const Style &source) {
 127         Clear(
 128             source.fore.desired,
 129             source.back.desired,
 130             source.size,
 131             source.fontName,
 132             source.characterSet,
 133             source.bold,
 134             source.italic,
 135             source.eolFilled,
 136             source.underline,
 137             source.caseForce,
 138             source.visible,
 139             source.changeable,
 140             source.hotspot);
 141 }
 142
 143 void Style::Copy(Font &font_, const FontMeasurements &fm_) {
 144         font.MakeAlias(font_);
 145 #if PLAT_WX
 146         font.SetAscent(fm_.ascent);
 147 #endif
 148         (FontMeasurements &)(*this) = fm_;
 149 }