Is there any easy way, maybe using NSGlyphInfoAttributeName, to have a glyph not be drawn at all? Like maybe replacing it with some kind of empty glyph?

You might read this post (and Aki's followup):

        http://www.cocoabuilder.com/archive/message/cocoa/2008/3/10/200928

The link for source code still seems to be working.

I should point out that I want to hide characters in a text view that do not cause any advancement: diacriticals and such.

Since that's the case, and your text isn't editable, it might be simplest to add a color attribute that matches the background color (eg: white) to all these characters. Certainly that would be easier than messing with the typesetter.

~Martin

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