src/stc/scintilla/src/Style.cxx

   1 // Scintilla source code edit control
   2 // Style.cxx - defines the font and colour style for a class of text
   3 // Copyright 1998-2000 by Neil Hodgson <neilh@scintilla.org>
   4 // The License.txt file describes the conditions under which this software may be distributed.
   5
   6 #include <string.h>
   7
   8 #include "Platform.h"
   9
  10 #include "Style.h"
  11
  12 Style::Style() {
  13         Clear();
  14 }
  15
  16 Style::~Style() {
  17         font.Release();
  18 }
  19
  20 Style &Style::operator=(const Style &source) {
  21         if (this == &source)
  22                 return *this;
  23         Clear();
  24         fore.desired = source.fore.desired;
  25         back.desired = source.back.desired;
  26         bold = source.bold;
  27         italic = source.italic;
  28         size = source.size;
  29         strcpy(fontName, source.fontName);
  30         eolFilled = source.eolFilled;
  31         return *this;
  32 }
  33
  34 void Style::Clear(Colour fore_, Colour back_, int size_, const char *fontName_,
  35         bool bold_, bool italic_, bool eolFilled_) {
  36         fore.desired = fore_;
  37         back.desired = back_;
  38         bold = bold_;
  39         italic = italic_;
  40         size = size_;
  41         strcpy(fontName, fontName_);
  42         eolFilled = eolFilled_;
  43         font.Release();
  44 }
  45
  46 void Style::Realise(Surface &surface, int zoomLevel) {
  47         int sizeZoomed = size + zoomLevel;
  48         if (sizeZoomed <= 2)    // Hangs if sizeZoomed <= 1
  49                 sizeZoomed = 2;
  50
  51         int deviceHeight = (sizeZoomed * surface.LogPixelsY()) / 72;
  52         font.Create(fontName, deviceHeight, bold, italic);
  53
  54         ascent = surface.Ascent(font);
  55         descent = surface.Descent(font);
  56         // Probably more typographically correct to include leading
  57         // but that means more complex drawing as leading must be erased
  58         //lineHeight = surface.ExternalLeading() + surface.Height();
  59         externalLeading = surface.ExternalLeading(font);
  60         lineHeight = surface.Height(font);
  61         aveCharWidth = surface.AverageCharWidth(font);
  62         spaceWidth = surface.WidthChar(font, ' ');
  63 }