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