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// Scintilla source code edit control
/** @file Style.cxx
** Defines the font and colour style for a class of text.
**/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <string.h>
#include "Platform.h"
#include "Scintilla.h"
#include "Style.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
Style::Style() {
aliasOfDefaultFont = true;
Clear(ColourDesired(0, 0, 0), ColourDesired(0xff, 0xff, 0xff),
Platform::DefaultFontSize(), 0, SC_CHARSET_DEFAULT,
false, false, false, false, caseMixed, true, true, false);
}
Style::Style(const Style &source) {
Clear(ColourDesired(0, 0, 0), ColourDesired(0xff, 0xff, 0xff),
0, 0, 0,
false, false, false, false, caseMixed, true, true, false);
fore.desired = source.fore.desired;
back.desired = source.back.desired;
characterSet = source.characterSet;
bold = source.bold;
italic = source.italic;
size = source.size;
eolFilled = source.eolFilled;
underline = source.underline;
caseForce = source.caseForce;
visible = source.visible;
changeable = source.changeable;
hotspot = source.hotspot;
}
Style::~Style() {
if (aliasOfDefaultFont)
font.SetID(0);
else
font.Release();
aliasOfDefaultFont = false;
}
Style &Style::operator=(const Style &source) {
if (this == &source)
return * this;
Clear(ColourDesired(0, 0, 0), ColourDesired(0xff, 0xff, 0xff),
0, 0, SC_CHARSET_DEFAULT,
false, false, false, false, caseMixed, true, true, false);
fore.desired = source.fore.desired;
back.desired = source.back.desired;
characterSet = source.characterSet;
bold = source.bold;
italic = source.italic;
size = source.size;
eolFilled = source.eolFilled;
underline = source.underline;
caseForce = source.caseForce;
visible = source.visible;
changeable = source.changeable;
return *this;
}
void Style::Clear(ColourDesired fore_, ColourDesired back_, int size_,
const char *fontName_, int characterSet_,
bool bold_, bool italic_, bool eolFilled_,
bool underline_, ecaseForced caseForce_,
bool visible_, bool changeable_, bool hotspot_) {
fore.desired = fore_;
back.desired = back_;
characterSet = characterSet_;
bold = bold_;
italic = italic_;
size = size_;
fontName = fontName_;
eolFilled = eolFilled_;
underline = underline_;
caseForce = caseForce_;
visible = visible_;
changeable = changeable_;
hotspot = hotspot_;
if (aliasOfDefaultFont)
font.SetID(0);
else
font.Release();
aliasOfDefaultFont = false;
sizeZoomed = 2;
lineHeight = 2;
ascent = 1;
descent = 1;
externalLeading = 0;
aveCharWidth = 1;
spaceWidth = 1;
}
void Style::ClearTo(const Style &source) {
Clear(
source.fore.desired,
source.back.desired,
source.size,
source.fontName,
source.characterSet,
source.bold,
source.italic,
source.eolFilled,
source.underline,
source.caseForce,
source.visible,
source.changeable,
source.hotspot);
}
bool Style::EquivalentFontTo(const Style *other) const {
if (bold != other->bold ||
italic != other->italic ||
size != other->size ||
characterSet != other->characterSet)
return false;
if (fontName == other->fontName)
return true;
if (!fontName)
return false;
if (!other->fontName)
return false;
return strcmp(fontName, other->fontName) == 0;
}
void Style::Realise(Surface &surface, int zoomLevel, Style *defaultStyle, int extraFontFlag) {
sizeZoomed = size + zoomLevel;
if (sizeZoomed <= 2) // Hangs if sizeZoomed <= 1
sizeZoomed = 2;
if (aliasOfDefaultFont)
font.SetID(0);
else
font.Release();
int deviceHeight = surface.DeviceHeightFont(sizeZoomed);
aliasOfDefaultFont = defaultStyle &&
(EquivalentFontTo(defaultStyle) || !fontName);
if (aliasOfDefaultFont) {
font.SetID(defaultStyle->font.GetID());
} else if (fontName) {
font.Create(fontName, characterSet, deviceHeight, bold, italic, extraFontFlag);
} else {
font.SetID(0);
}
ascent = surface.Ascent(font);
descent = surface.Descent(font);
// Probably more typographically correct to include leading
// but that means more complex drawing as leading must be erased
//lineHeight = surface.ExternalLeading() + surface.Height();
externalLeading = surface.ExternalLeading(font);
lineHeight = surface.Height(font);
aveCharWidth = surface.AverageCharWidth(font);
spaceWidth = surface.WidthChar(font, ' ');
}