Created
July 9, 2019 14:20
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retrieve width of space character and compute how many spaces are required to fill the gap
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| let spaceWidth = { () -> Double in | |
| let font = self.font! | |
| var spaceGlyph = CGGlyph() | |
| var space: UniChar = numericCast((" " as Unicode.Scalar).value) | |
| _ = CTFontGetGlyphsForCharacters(font, &space, &spaceGlyph, 1) | |
| return CTFontGetAdvancesForGlyphs(font, .horizontal, &spaceGlyph, nil, 1) | |
| }() | |
| // to be called from func layoutManager(_ layoutManager: NSLayoutManager, shouldSetLineFragmentRect lineFragmentRect: UnsafeMutablePointer<CGRect>, lineFragmentUsedRect: UnsafeMutablePointer<CGRect>, baselineOffset: UnsafeMutablePointer<CGFloat>, in textContainer: NSTextContainer, forGlyphRange glyphRange: NSRange) | |
| let addSpaces = Int(Double(lineFragmentRect.pointee.maxX - lineFragmentUsedRect.pointee.maxX) / spaceWidth) |
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