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/**
* QuartzTextStyleAttribute.h
*
* Original Code by Evan Jones on Wed Oct 02 2002.
* Contributors:
* Shane Caraveo, ActiveState
* Bernd Paradies, Adobe
*
*/
#ifndef QUARTZTEXTSTYLEATTRIBUTE_H
#define QUARTZTEXTSTYLEATTRIBUTE_H
// Convert from a FontWeight value to a floating point value to pass to CoreText.
// This was defined based on Cocoa's NSFontWeight* values, discussion by other open
// source projects then tweaked until most values produced visibly different results.
inline double WeightFromEnumeration(Scintilla::FontWeight weight) {
switch (static_cast<int>(weight)/100) {
case 0: return -1.0;
case 1: return -0.7;
case 2: return -0.5;
case 3: return -0.23;
case 4: return 0.0;
case 5: return 0.2;
case 6: return 0.3;
case 7: return 0.4;
case 8: return 0.6;
case 9: return 0.8;
}
return 0.0;
}
// Convert from a FontStretch value to a floating point value to pass to CoreText.
// This was defined based on values used by other open source projects then tweaked
// until most values produced reasonable results.
inline double StretchFromEnumeration(Scintilla::FontStretch stretch) {
switch (stretch) {
case Scintilla::FontStretch::UltraCondensed: return -0.8;
case Scintilla::FontStretch::ExtraCondensed: return -0.3;
case Scintilla::FontStretch::Condensed: return -0.23;
case Scintilla::FontStretch::SemiCondensed: return -0.1;
case Scintilla::FontStretch::Normal: return 0.0;
case Scintilla::FontStretch::SemiExpanded: return 0.1;
case Scintilla::FontStretch::Expanded: return 0.2;
case Scintilla::FontStretch::ExtraExpanded: return 0.3;
case Scintilla::FontStretch::UltraExpanded: return 0.7;
}
}
class QuartzFont {
public:
/** Create a font style from a name. */
QuartzFont(const char *name, size_t length, float size, Scintilla::FontWeight weight, Scintilla::FontStretch stretch, bool italic) {
assert(name != NULL && length > 0 && name[length] == '\0');
CFStringRef fontName = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingMacRoman);
assert(fontName != NULL);
// Specify the weight, stretch, and italics
DictionaryForCF traits;
const double weightValue = WeightFromEnumeration(weight);
traits.SetItem(kCTFontWeightTrait, kCFNumberCGFloatType, &weightValue);
const double stretchValue = StretchFromEnumeration(stretch);
traits.SetItem(kCTFontWidthTrait, kCFNumberCGFloatType, &stretchValue);
if (italic) {
const int italicValue = kCTFontTraitItalic;
traits.SetItem(kCTFontSymbolicTrait, kCFNumberIntType, &italicValue);
}
// create a font decriptor and then a font with that descriptor
DictionaryForCF attributes;
attributes.SetValue(kCTFontTraitsAttribute, traits.get());
attributes.SetValue(kCTFontNameAttribute, fontName);
CTFontDescriptorRef desc = ::CTFontDescriptorCreateWithAttributes(attributes.get());
fontid = ::CTFontCreateWithFontDescriptor(desc, size, NULL);
CFRelease(desc);
if (!fontid) {
// Traits failed so use base font
fontid = ::CTFontCreateWithName(fontName, size, NULL);
}
if (!fontid) {
// Failed to create requested font so use font always present
fontid = ::CTFontCreateWithName((CFStringRef)@"Monaco", size, NULL);
}
CFRelease(fontName);
}
CTFontRef getFontID() {
return fontid;
}
private:
CTFontRef fontid;
};
#endif
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