Spacing control around custom text attributes in NSLayoutManager

Question

I have a custom subclass NSLayoutManagerthat I used to draw tablets in tablet form. I draw these tokens for substrings using a custom attribute ( TokenAttribute). I do not see a problem.

However, I need to add some spaces around the ranges with TokenAttribute(so that the round rectangle of the marker background will not intersect with the text).

In the above image, Im is painting a background with my gestures in orange, but I need an extra padding around 469so that the background doesn't match the text.

I'm really not sure how to do this. I tried overriding -boundingRectForGlyphRange:inTextContainer:to return a bounding box with a more horizontal fill, but it doesn't seem to be affected by the glyph layout.

How to increase the distance between glyphs / glyph ranges?

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Here is the code I use to paint the background in my subclass of the layout manager:

- (void)drawGlyphsForGlyphRange:(NSRange)glyphsToShow atPoint:(CGPoint)origin {

    NSTextStorage *textStorage = self.textStorage;
    NSRange glyphRange = glyphsToShow;

    while (glyphRange.length > 0) {

        NSRange characterRange = [self characterRangeForGlyphRange:glyphRange actualGlyphRange:NULL];
        NSRange attributeCharacterRange;
        NSRange attributeGlyphRange;

        id attribute = [textStorage attribute:LAYScrubbableParameterAttributeName 
                                      atIndex:characterRange.location 
                        longestEffectiveRange:&attributeCharacterRange 
                                      inRange:characterRange];

        attributeGlyphRange = [self glyphRangeForCharacterRange:attributeCharacterRange 
                                           actualCharacterRange:NULL];
        attributeGlyphRange = NSIntersectionRange(attributeGlyphRange, glyphRange);

        if (attribute != nil) {
            CGContextRef context = UIGraphicsGetCurrentContext();
            CGContextSaveGState(context);

            UIColor *backgroundColor = [UIColor orangeColor];
            NSTextContainer *textContainer = self.textContainers[0];
            CGRect boundingRect = [self boundingRectForGlyphRange:attributeGlyphRange inTextContainer:textContainer];

            // Offset this bounding rect by the `origin` passed in above
            // `origin` is the origin of the text container!
            // if we don't do this, then bounding rect is incorrectly placed (too high, in my case).
            boundingRect.origin.x += origin.x;
            boundingRect.origin.y += origin.y;

            [backgroundColor setFill];
            UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:boundingRect cornerRadius:boundingRect.size.height / 2.0];
            [path fill];

            [super drawGlyphsForGlyphRange:attributeGlyphRange atPoint:origin];
            CGContextRestoreGState(context);

        } else {
            [super drawGlyphsForGlyphRange:glyphsToShow atPoint:origin];
        }

        glyphRange.length = NSMaxRange(glyphRange) - NSMaxRange(attributeGlyphRange);
        glyphRange.location = NSMaxRange(attributeGlyphRange);
    }
}