Old draw string method

draw_string.m

/* == Old draw string method
*/
- (CGFloat)drawString:(NSString*)ch font:(NSFont*)font context:(CGContextRef)context {
    NSMutableAttributedString *s = [[NSMutableAttributedString alloc] initWithString:ch];
    [s addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, 1)];
    [s addAttribute:NSForegroundColorAttributeName value:[NSColor blackColor] range:NSMakeRange(0, 1)];
    
    CFAttributedStringRef attrStr = (__bridge CFAttributedStringRef)(s);
    CTLineRef line = CTLineCreateWithAttributedString(attrStr);
    CTLineDraw(line, context);
    CFArrayRef runs = CTLineGetGlyphRuns(line);
    CTRunRef firstRun = CFArrayGetValueAtIndex(runs, 0);
    CGSize size;
    CTRunGetAdvances(firstRun, CFRangeMake(0, 1), &size);
    CFRelease(line);
    return size.width;
}